The Scotch Yoke Engine is Alive! 8 Pistons, 4 Rods

Автокөліктер мен көлік құралдары

A video that can help you better understand engine balance and the difference between flat boxer and flat non-boxer engines: • Deep Dive: Inline 4 vs...
Last week I made a video explaining scotch yoke engines and I did a bit of an update on Alfadan, the company that is planning to release a scotch yoke inline four engine in the future.
But after making the video I was still thinking a bit about the scotch yoke design and it’s related balance so I decided to do some research. Now on the Wikipedia page for scotch yoke I found this interesting chunk of text that mentions the Bourke engine as well hot air and steam engines, that’s all pretty well known stuff. But what I never heard about before is this, something called the sytech engine. And as you can see this is not hyperlinked…there’s no wiki page on sytech engine.
So I google sytech engine and eventually ended up on this page right here, and boy was I surprised. Look! This is not a 3d render. This is a photo of an actual engine. This thing is real. And it’s incredibly interesting. Now before we go any further, I just want to say that this is not in any way a sponsored video. I have not even gotten in touch with this company. I’m not promoting anything. This is just me exploring and sharing something really really interesting that I found purely by chance. And as you will see I didn't need to get in touch with these guys because all the information you could possibly want, they have already published it, they have done all the testing, this is pretty much a production ready engine. Honestly this whole page really made my day as it’s been a long time that I stumbled onto something this new and this interesting. Look, they even made a flat 8-cylinder non-boxer scotch yoke engine
And as you can see the engine in this video is a scotch yoke flat four non-boxer opposed piston engine, which interestingly enough is a completely different approach to Alfadan which aims to make a inline four scotch yoke engine.
Now this is extremely interesting because a flat four non-boxer engine is a stupid idea from the perspective of engine balance. Now as you have seen from my previous video the scotch yoke design completely eliminates secondary balance issues which means that a four cylinder now becomes the lowest number of cylinder needed to achieve perfect balance without balance shafts, whereas with a conventional crank and rod the lowest number of cylinders needed to achieve this is 6.
A scotch yoke inline four has perfect primary and secondary balance. But a flat four non-boxer does not, regardless if it’s scotch yoke or not.
The four cylinder scotch yoke engine is supposed to be a range extender and when you take this into account the flat four non-boxer configuration really starts making sense because this is overall the most compact possible four cylinder engine configuration.
And if we scroll down to the bottom of the website we can find three very interesting PDFs. If we open the first one we will find an incredible wealth of data among which is also this page. And here you can see that a very compact flat four engine enables placement almost anywhere in the car or in the words of sytech “the engine can be placed in areas of the vehicle that other engines cannot”.
As you can see a flat four scotch yoke beats other four cylinders in terms of size. In the boxer each rod gets its own crankpin but in the flat engine we put two rods on one crank pin. This is why a flat non-boxer engine is noticeably shorter than a flat boxer engine. But the scotch yoke design takes this a step further. In conventional flat non boxer we have to stack the rods side by side but in a scotch yoke the engine is constructed in such a way that the pistons are perfectly opposed which means that a scotch yoke flat four can be shorter than any conventional four cylinder engine configuration.
Another interesting thing to observe Is that this is a modular engine. According to this Sytech is planning to offer a 2 a 4 and an 8 cylinder version. Modularity means high parts commonality and this means reduced costs and increased market coverage. The 2 cylinder version can for example be used for home generators, the four cylinder is a great range extender whereas the 8 cylinder is likely intended for performance oriented combustion only or hybrid vehicles. I have to say that the 8 cylinder is extremely interesting as this is a true engine-head configuration. I’m pretty sure they went for 8 cylinders because this configuration enables perfect balance out of the box without balancing shafts. Judging from the engine codes the 8 cylinder is a 3.0 liter engine and in turbocharged form it churns out 335 horsepower which isn’t especially impressive by modern standards but it’s still definitely respectable.
A special thank you to my patrons:
Daniel
Pepe
Brian Alvarez
Peter Della Flora
Dave Westwood
Joe C
Zwoa Meda Beda
Toma Marini
Cole Philips
#d4a #scotchyoke

Пікірлер: 2 100

  • @inertiaMS
    @inertiaMS11 ай бұрын

    Some times people need to relax their expectation of every idea needing to become a commercial success to be considered anything but a failure or scam. Whether it becomes a relavant piece of technology going forward we should all just enjoy this process or seeing and working through this engineering challenges

  • @d4a

    @d4a

    11 ай бұрын

    Thank you for that!

  • @piccalillipit9211

    @piccalillipit9211

    11 ай бұрын

    I completely agree

  • @kricker8562

    @kricker8562

    11 ай бұрын

    @@d4a I was wondering, if the scotch yoke is allowed to tilt by using a wrist pin, how is it then any different to a normal engine with con-rods?

  • @GCS88

    @GCS88

    11 ай бұрын

    @@kricker8562 It's all about the pull, a traditional piston on conrods gets pulled on an angle so 'side thrusts' occurs when the rings glide on the cylinder walls, I can imagine that the scotch yoke would also have this but in a very miniscule amount as it moves in a vertical manner

  • @geemy9675

    @geemy9675

    11 ай бұрын

    ​​​​@@kricker8562hink the Conrod is guided and actually not supposed to rotate more than within the tolerances. the pin is just to spread the side load and friction of the piston on all the contact surface with the cylinder instead of just the edge. think a hundredth of a degree of rotation if the Conrod is free to rotate then you have one to many degree of freedom and no more direct relation between the pistons position and crank position. the crank could rotate without moving the piston! the engine won't spin predictably, you don't have accurate timing and an engine that wouldn't even start and would lock itself

  • @thevoiceofcake
    @thevoiceofcake11 ай бұрын

    Huge props to the company for posting their data.

  • @markm0000
    @markm000011 ай бұрын

    This guy has unlocked the ability to love engines more than most guys love women.

  • @d4a

    @d4a

    11 ай бұрын

    😂😂😂

  • @BloodyMobile

    @BloodyMobile

    11 ай бұрын

    Only a true engineer can properly admire engineering achievements. Most things aren't impressive unless you understand /why/ they /are/ impressive. The best example are CPUs. What our phones can do in the size and energy footprint today, would've been a borderline mini (not just in the literal sense) super-computer a quarter century ago. Back when CPU speeds were 3 digit *mega*hertz and some computers even had a "Turbo" key, which is basically the ancestor of on-demand overclocking. Today CPUs do that constantly on their own, because why run at 2.5 Ghz when there's nothing to do? Literal waste of power. Same goes for engines. The engineering to get them as efficient as they are today went equally far, but you need to understand how intricate the balance of all parts in relation to each other is, before it becomes truly impressive. An example here would by my '18 VW Polo vs an original VW Beetle: the Beetle needs 3x the fuel of my Polo to create 1/3 of the power. My Polo can go +180 km/h with the consumption that the Beetle had on *average*. If that progression over the decades isn't impressive, then nothing in the engineering world is. Probably. But it's not impressive unless one really builds an understanding for the "how" and "why" of these examples. Without that, it's just numbers.

  • @VintageSG

    @VintageSG

    11 ай бұрын

    Cars don't get jealous if you look at another car. Cars don't stab you if you take another for a test drive. Cars don't care if you're polycarous ( polygamy with cars? ) Own two cars?, sleep well. Cars don't care if you replace them with a younger, slimmer model. Cars don't take your house and savings if you get another one. Cars don't gossip if you take a motorbike for a ride. Cars shut up when you turn them off and walk away. Cars are easy to turn on when you want. Cars don't care if you fart. Cars don't have psycho mothers.

  • @toejamr1

    @toejamr1

    11 ай бұрын

    Yes. We call this autism

  • @OldSchoolZ-wy2yx

    @OldSchoolZ-wy2yx

    11 ай бұрын

    ​@@toejamr1 wtf are you on

  • @Taliyon
    @Taliyon11 ай бұрын

    I've studied engine balance for over a decade. You consistently break it down in a way I've never been able to translate to others.

  • @user-ec9bs4df1q

    @user-ec9bs4df1q

    11 ай бұрын

    What did you study? These engines are a balance nightmare. If you were that knowledgeable you would know how much bs this guy spits out

  • @Wtfinc

    @Wtfinc

    11 ай бұрын

    @@user-ec9bs4df1qhe just says he studied it, not went to school. U need to calm down. And dude explained it great, there was no BS. If you anything about anything you would not have latched onto that. Since you know everything, why does he keep clarifying the flat 4 as “non-boxer” when a boxer engine is just a Subaru flat 4, its not an engine type. If it is, what makes a boxer different from any other flat 4? Different ignition cycles? Idk

  • @kadmow

    @kadmow

    11 ай бұрын

    @@Wtfinc : Boxer engine - also typical of Porsche 911 (Boxter, Cayman, Spyder) flat engines (aero derived) - typified by offset cylinders with conrods on individual crankshaft journals - moving with with opposing directions (matched pairs moving out or inwards simultaneously - Apparently it is a very old design, from back in 1887 (Karl Benz), long before Ferdinand became chief automaker to Herr H. Commonly adopted in Aircraft applications - ie. Lycoming, Continental, etc.. Other flat 4's use common journals and evenly-opposed cylinders - both cylinders motion being constrained by the common crank journal.. (as per the graphics in this video) - the Flat "non-boxer" is commonly described as a 180 degree 'V' engine - any angle could be used for packaging needs (Ferrari flat 12 is an example (used in the Berlinetta Boxer, which funny enough didn't have a Boxer Engine).. - note; flat plane and cross plane cranks could be used in either v or flat engines - as well as individual or shared journals, there may not be a pet name for every variant, Boxer is just one which stuck. NB, all of this could well be wrong, do your own research, it is fairly easy these days, lol...

  • @colinfitzsimons3409

    @colinfitzsimons3409

    11 ай бұрын

    ​@@Wtfinc is that comment for real? What a joke!

  • @colinfitzsimons3409

    @colinfitzsimons3409

    11 ай бұрын

    ​@@Wtfinc the "dude" got it completely wrong yet again.

  • @alfadanhighperformanceoutb8416
    @alfadanhighperformanceoutb841611 ай бұрын

    At ALFADAN we looked at this same design given that the owner personally owned the only Bourke 400 ever built. The Bourke 400 was this same flat 4 design but in a two stroke, 400 cubic inch version. The ALFADAN outboard project required a 7.5 Liter displacement and the i4 was the best platform that gave us the smallest engine possible. Although our design ideas originated from the Scotch Yoke we had to take a completely different design approach due the weak lower end of the rod as described in this video. In summary, the ALFADAN design achieves large displacement in a small engine package operating under perfect primary and secondary balance without the added friction and complexity of balance shafts. Great video D4A!

  • @rickcollins1825

    @rickcollins1825

    Ай бұрын

    Why couldn't ALFADAN strengthen the bottom of the Scotch Yoke? It's only loaded on the intake stroke of the cycle.

  • @FarhadB-og9js

    @FarhadB-og9js

    Ай бұрын

    این پروژه هم شکست خورده هست. بیخود تلاش نکنید

  • @horrorhotel1999

    @horrorhotel1999

    25 күн бұрын

    This commercial brought to you by investor-money which was meant to go towards developing the final product, but goes to PR-salaries instead ❤

  • @albertaraujo6358

    @albertaraujo6358

    25 күн бұрын

    We have no affiliation or business with D4A. Nevertheless, D4A has done a great job at describing the SY engine. With regards to strengthening the bottom of the SY rod it does not solve the problem. As weight increases in trying to add strength, the reciprocating mass also increases which further increases the load on the rod and bearing. We worked on this design and decided to opt for a new design with no lower rod end and therefore solved this issue.

  • @eTiMaGo
    @eTiMaGo11 ай бұрын

    Looks like it could drop into a Subaru :D

  • @Athiril

    @Athiril

    11 ай бұрын

    Yeah I think a scotch yoke boxer would be pretty cool. We might as well go all the way. Dimpled pistons. Some kind of freevalve for full timing control.

  • @mikewallace8087

    @mikewallace8087

    11 ай бұрын

    @@Athiril the problem with all these I.C.E. is they are energy sinks that reject energy to the surrounding air . No ceramic engine revolution yet.

  • @Vel1ar

    @Vel1ar

    11 ай бұрын

    @@Athiril well, 4cyl seems to peak in power at 4500 rpm, which is disappointing. If 8cyl redlines in same rpm range, it'll be one boring-ass engine.

  • @budthecyborg4575

    @budthecyborg4575

    11 ай бұрын

    My first thought. I would cry tears of joy if this can revive the WRX STI.

  • @2b134

    @2b134

    11 ай бұрын

    @@Vel1ar yeah, but I assume that might be due to the efficiency-oriented cam profile, maybe with a more aggressive profile it could be much better at higher rpm

  • @myhandleurl
    @myhandleurl11 ай бұрын

    Thank you. As someone who had to leave behind mechanical engineering to pursue IT, your amazing channel helps me stay up to date with the field I truly love.

  • @shampoo4273

    @shampoo4273

    11 ай бұрын

    Same lol

  • @alphaforce6998

    @alphaforce6998

    11 ай бұрын

    What is it with people not being able to accept responsibility for the decisions they make. Who put a gun to your head or otherwise coerced you into choosing IT, where you will soon be replaced by an AI chatbot, instead of sticking with the thing you enjoyed?

  • @myhandleurl

    @myhandleurl

    11 ай бұрын

    @@alphaforce6998 No one put a gun to my head. I chose IT bcos it provides a good income and the demand for mechanical engineerings in auto industry is dropping (at least in my part of the world). Sometimes one can’t always follow their passion. I have to also say, IT is not as boring as I assumed it might be.

  • @alphaforce6998

    @alphaforce6998

    11 ай бұрын

    @@myhandleurl If you are a decent mechanical engineer, what is stopping you from independently applying your skills to design and sell things OR plans for other people to build things?

  • @artlewellan2294

    @artlewellan2294

    11 ай бұрын

    @@myhandleurl A flaw in the presentation of this engine type may be a lack of thorough analysis of its "extended range" plug-in hybrid (PHEV) applications. PHEV engines achieve highest fuel economy (100mpg -150mpg) when their modest battery packs (Prius 5kwh vs Chevy Volt 18kwh) drive the car while the ICEngine is off. The ICEngine of a PHEV drivetrain is designed for fuel economy, not maximum horsepower nor torque. There are many, many benefits PHEV tech offers that deserve mention more than how their ICEngines achieve fantastic fuel economy. Another benefit is public safety. PHEVs can be driven by reckless speeders but their fuel economy plummets from 100-150mpg to 40-50mpg. Keeping a light touch on the gas pedal can teach idiot motorists how to drive defensively while spending less on gas. While BEV & HFCEV tech emphasize maximum driving range (say 300 miles) the limited all-electric range PHEVs offer (20-50 miles) encourages shorter drives which supports local economies whereby more trips eventually become possible without having to drive.

  • @shootadeah
    @shootadeah11 ай бұрын

    Dude your videos are LITERALLY the most detailed and informative videos on KZread!! And you’re the only one who can keep me completely attentive even with A.D.D. 🤣😂

  • @apparentlysmarterthanyou3446

    @apparentlysmarterthanyou3446

    Ай бұрын

    I hear you about the ADD, something makes me think that this guy suffers from a neurodivergence himself. Not always a bad thing,unlike what people think! Besides, having ADD, if we like a subject we will focus on it intensely, normally its only a hinderance if you're trying to focus on something you dont like but need to do XD

  • @maccaberry1041
    @maccaberry104111 ай бұрын

    The grin on your face shows how excited your are and is so fun to watch. The ICE is not dead, and your enthusiasm for it brings a smile to my face too. I bet when you discovered this, it even exceeded the joy of your first motorcycle ride.

  • @johnburns4017

    @johnburns4017

    11 ай бұрын

    The ICE is slowly dying. The end will be quick.

  • @cerseonbrassmann5222
    @cerseonbrassmann522211 ай бұрын

    I just love your expressions. you actually really glow up/ geek out over it. it's fascinating

  • @fredericocorrea9814
    @fredericocorrea9814Ай бұрын

    I love this guy's zeal and understanding of engines and engineering. He singlehandedly has caused me to look forward to new technology in the world of engines. The way he breaks down the science and evolution is incredible. Thank you so much for sharing your knowledge, I am in your debt. Another great video.

  • @JeffreyClark-fp5up
    @JeffreyClark-fp5up10 ай бұрын

    I am a private pilot that owns a single opposing piston engine airplane in a land configuration, My airplane is a 1949 North American, Ryan Navion which is powered by a Teledyne Continental E-225-4 over head valve opposing 6 cylinder engine with a 5in bore and a 4in stroke, which means that this engine is not a boxer. This engine has 470 cubic in displacement and gives 225 HP at 2,600 RPM. The engine in my airplane works well and is proven dependable after decades or application. The continental engine company has the only engine that has a 8 cylinder version of this design, which supply's an impressive 400 HP and to my knowledge is only in one airplane and that is a Piper Comanche 400. All that being said, this Scotch Yoke engine would be a great engine for the aviation industry. I would love to see this happen. So thank you for your video and update on a modern tech improvement in my opinion.

  • @budthecyborg4575
    @budthecyborg457511 ай бұрын

    The flat non-boxer addresses basically all of the flaws mentioned in the first video. Bravo to the Sytech engineers. Let's hope Porsche and Subaru can adopt this configuration ASAP.

  • @Wingnut353

    @Wingnut353

    11 ай бұрын

    It absolutely does not address all the problems... that engine is obviously going to have high wear on that scotch yoke.... and probably need replacement every few tens of k of miles... while normal boxer engines last hundreds of thousands of miles with minimal maintenance.

  • @Imagineering100

    @Imagineering100

    11 ай бұрын

    @@Wingnut353 Yes it will it looks to me it has more surface area to wear out. I don't see the big car company use this they have too much invested in normal engine design and put this into production yes billion$ and 5 years and then if they have problems with it when they have sold 100000s of them well say goodbye. Not just that the car companies have known about this for decades if it was good, they would have done this decades ago.

  • @CountChokcula

    @CountChokcula

    11 ай бұрын

    @@Wingnut353 they can make it a roller bearing

  • @michaelpielorz9283

    @michaelpielorz9283

    11 ай бұрын

    The internet is floodet with new engine designs that have one thing in common: even Wile E. Coyote wouldnt adopt them (:-)Dear boys, before praising them like a golden calf sit down and THINK for one miute (only if it is possible for you!!

  • @michaelpielorz9283

    @michaelpielorz9283

    11 ай бұрын

    @@WaldemarPerezJr Please stop taking those colorful pills !!

  • @wingnut2893
    @wingnut289311 ай бұрын

    The overwhelming enthusiasm is contagious.

  • @der_kanadier
    @der_kanadier10 ай бұрын

    I think you might have missed an aspect of the cylinder wall forces @12:30. In the boxer configuration, the piston leaning force during the compression stroke is shared with the non-combustion cylinder through the single connecting rod. This should roughly half the twisting load between the cylinders and spread the wear from this friction to both sides of the cylinder. This could reduce overall wear due to these forces. Great video!

  • @raptorjesus5488

    @raptorjesus5488

    Ай бұрын

    I don't know how the i4 will solve yoke lean all I can think of is guides in the block on either side of the big end of the yoke or a guide rod on the yoke sticking into the oil pan through a girdle or something

  • @rickcollins1825

    @rickcollins1825

    Ай бұрын

    Yes, the Scotch Yoke as show in the video would not only create friction on the piston skirt and cylinder walls, it creates a twisting motion on the piston, since there is nothing else to keep the piston straight. By adding a wrist pin, the twisting force is eliminated, leaving only the sideways push from the offset force of the crank bearing.

  • @almostbutnotentirelyunreas166
    @almostbutnotentirelyunreas16611 ай бұрын

    Been watching this channel for some time now, going from strength to strength, focusing on FACTS, rather than hype. There's an engineer in there somewhere, directing the excelelnce of the information and the video quality....Congratulations, keep this up! A credit to YT.

  • @foolicooli
    @foolicooli11 ай бұрын

    A 3.0L puting out 335 is pretty good for what is essentially a experimental design.

  • @didjterminator808

    @didjterminator808

    11 ай бұрын

    ikr!? and with how small and light it is you could probably fit it into many cars that shouldn't be able to fit a 3L F8 engine. I honestly kinda wanna see someone tune that engine up for a semi-race endurance build in a super compact ultra light car and absolutely send it. Like Rob Dahm but with a scotch yoke.

  • @rdallas81

    @rdallas81

    11 ай бұрын

    Only under very specific circumstances. The engine probably can not be directly connected to a typical transmission. The linkage looks weak and probably loses a lot of potential energy through that. I don't believe it will go anywhere. A range extension engine should be a diesel. Actually mazda did a rotor engine for a range extender and its hooked to a generator that charges its battery ONLY. Its not connected to the wheels at all. They did a pretty good job with it.

  • @didjterminator808

    @didjterminator808

    11 ай бұрын

    @@rdallas81 that do be true - but we can still dream

  • @foolicooli

    @foolicooli

    11 ай бұрын

    @@rdallas81 rotary engines aren't used because their oil consumption fuel economy and poor emissions. Diesels are good work horses but generally heavy weight. The geometry of the 3.0l V8 on a light frame say 90s Miata would probably handle it fine. I don't see these engines going in anything trying to be a tow vehicle or similar work load. But a few years in the market they may redesign the pistols to be stouter etc. These have great race potential imo. Slap on some solenoids for the variable timing and other things becoming more common in the race scene like the newer F1s with the weight savings I could see these maybe being banned like the old road runners did from nascar being too aerodynamic

  • @rdallas81

    @rdallas81

    11 ай бұрын

    @@didjterminator808 I do. So many ideas. I have ideas! Just crazy this world is dominated by substances, drugs, violence, media, etc etc. All revolves around government, money, lies. We need a new coalition. We need new people to provoke involvement like it used to be. Now, with media and "independence" people have grown apart. A great falling away it seems. Imagine a world where China, Russia, Japan, UK, can go work together and invent new technologies together. Imagine what problems we could all solve. Instead- people choose to make enemies out of their neighbors. And they expect their children to do "the right thing"? Sorry. Just venting. I like these engines and technologies because we can have 20 different people from 20 different countries and its like it doesn't even matter. We all speak the same language when it comes to technologies.

  • @argledotorg
    @argledotorg11 ай бұрын

    The bearing surface is probably made of a relatively soft metal, since it appears to be made for "easy" replacement

  • @wobblysauce

    @wobblysauce

    11 ай бұрын

    Just a bearing material…

  • @micgalovic

    @micgalovic

    11 ай бұрын

    Easy replacement is arguably more important than maximizing wear life. Doing an easy replacement job twice is better than doing a hard replacement job once.

  • @IIGrayfoxII

    @IIGrayfoxII

    11 ай бұрын

    @@micgalovic Stripping down the engine is still costly for the customer

  • @budthecyborg4575

    @budthecyborg4575

    11 ай бұрын

    In high end pocket knives they like to use phosphor bronze washers to make a smooth pivot, not sure if those are up for the heat though.

  • @flexairz

    @flexairz

    11 ай бұрын

    I am sure the designers have thought of this too...

  • @max_power8510
    @max_power851011 ай бұрын

    Seeing your happiness and enthusiasm is what makes the heart of this channel beat. We feel just as enthusiastic as you about seeing new engine technology become available and the exciting possibilities of adding more power! Your smile at the end of the video really summed up why I started watching this channel.

  • @concoat
    @concoat9 ай бұрын

    I believe Commer commercial vehicles made a similar diesel truck engine back in the seventies, sounded amazing.

  • @alanbunder9068
    @alanbunder906811 ай бұрын

    I love how excited you were scrolling through all the data on the website, great video!

  • @originalni_popisovac

    @originalni_popisovac

    11 ай бұрын

    no u dont

  • @hasanimam3102
    @hasanimam310211 ай бұрын

    Once again this guy is here with knowledge that even your bachelor's in Automotive Engineering course won't provide

  • @BitchinSpectre

    @BitchinSpectre

    11 ай бұрын

    Must have gone to csu.

  • @AlexTrull
    @AlexTrull11 ай бұрын

    Your honesty and interest always shine through, thank you.

  • @brendonrenken6811
    @brendonrenken68117 ай бұрын

    Also YOU! YOU ARE THE BEST GUY ON THE INTERNET! I have learned more from your videos then any other source or any kinda experience! Keep doing your thing!

  • @GL0BETREKKER
    @GL0BETREKKER11 ай бұрын

    the low center of gravity seems great for sports car applications, and so compact too. Cant wait to see more of this engine

  • @JohnKickboxing

    @JohnKickboxing

    6 ай бұрын

    This engine would get worn fast and badly, due to high friction. They need to add some rollers there to solve this problem.

  • @blackfrost273industries4
    @blackfrost273industries411 ай бұрын

    I hope you also add in that I am also very, very satisfied that they shared so much information. That is awesome that they publish all of that on their website ! That made my whole month

  • @user-hb8sq6ce9u

    @user-hb8sq6ce9u

    11 ай бұрын

    But can you trust that information - are the curves in the graphs really measured or are they only sketched.

  • @thomaswomack3888
    @thomaswomack38887 ай бұрын

    I really appreciate how well you have presented all of this information in a way that is understandable and digestible. And props to Sytech for making this engine design work. I'd love to try one of their 8 cylinder engines in my old subaru and see what kind of lovely monster it would be. :)

  • @pugnate666
    @pugnate66611 ай бұрын

    Thanks for the update! Great to see a more mature version with extensive documentation.

  • @howardking3601
    @howardking360111 ай бұрын

    Really interesting and fun! You are a great presenter. You break things down very well and keep them simple. Thanks!

  • @nhand42
    @nhand4211 ай бұрын

    This engine was developed by CMC Research Australia over two decades ago. There were plans to put it into a hybrid concept car back in the early 2000s but that never happened. I would wager good money in the past two decades they tried shopping it to the well known manufacturers - Ford, Toyota, VAG - who all looked at this and decided against it. Selling it into China means they've hit rock bottom.

  • @andgate2000

    @andgate2000

    11 ай бұрын

    Just in time for the elec invasion.

  • @68404

    @68404

    11 ай бұрын

    Actually, the only game in town is China. It is now the biggest car market in the world. China has evolved. It seems your prejudices have not.

  • @frutt5k

    @frutt5k

    11 ай бұрын

    @@68404 You just don't understand things, do you?

  • @mikescherrer4923

    @mikescherrer4923

    7 ай бұрын

    @@68404China has evolved? Ok, Chinese bot. Tell Xi the propaganda isn't working. China is a doomed cesspool full of rats clawing at each other to stay above the rising water of the CCP's war on it's own people.

  • @javabean215
    @javabean21511 ай бұрын

    The single piston rod weakness issue, you spoke about in the first video. And my immediate thought was to add a piston to both sides. This is pretty cool, and I'm hoping to see it get some production time to see how it does in the real world.

  • @chrisbaker2903
    @chrisbaker290311 ай бұрын

    I remember my dad telling me about scotch yoke engines at least 60 years ago and the biggest problem he told me about what the amount of instantaneous torque. He told me about a two cylinder version hooked to a car transmission and it would sheer the splines off the input shaft to the clutch. He also told me about a 4 cylinder version that they put a propeller on, 8 bolts around the hub and they ran it up to half power and when they put full power it sheered all 8 bolts. I hadn't heard anything else about them since then and this must have happened in the 1950s or late 40s. I look forward to learning more.

  • @Chris-oj7ro
    @Chris-oj7ro11 ай бұрын

    This engine is completely new to me also and I thank you for going over it in detail! Maybe you could make a video on other promising engine designs that still have potential, whether or not we can expect some commercial release in the near future.

  • @zaccheus
    @zaccheus4 ай бұрын

    If the engine is designed from the start as a range extender, it would certainly be possible that it could have an oil priming system that developed oil pressure before a start. Engine start is where a lot of bearing wear comes from because there is only an oil film, at best, to lubricate the journal bearings.

  • @Eikenhorst

    @Eikenhorst

    3 ай бұрын

    You could solve that by starting an oil pump for this oil a few seconds before starting the main engine. Startup goes from 1 second to a second or 5, but that is not critical if that is what is needed to use an engine with plenty of advantages. But I agree that a range extender application makes more sense

  • @zaccheus

    @zaccheus

    3 ай бұрын

    @Eikenhorst A delayed start doesn't seem critical. But we live in a world where CVT transmissions still shift through fixed ratios because customers don't like it when the can't feel the car shift 🤷‍♂️

  • @MrChancebozey
    @MrChancebozey11 ай бұрын

    There was a radial four piston two stroke motorcycle using a similar concept to a Scotch Yoke design almost 20 years ago called the JJ2S X4 500. Great vids and content.

  • @PetarMakTeacher
    @PetarMakTeacherАй бұрын

    Some years ago I worked with CMC research where the SyTech engine was designed and built, in conjunction with Melbourne University. The engine was incredibly smooth running and it was very compact due to the short conrods. Side forces on the pistons is negligible due to the solid connection on the conrod. Our test vehicle was a Subaru as it used Subaru heads and bolted directly into it. We fitted a test engine into a passenger vehicle (Passat) as VW were interested in the concept. Unfortunately, like so many other research groups, the funding dried up and it was shelved. It's great to see it appear again, as I know there was an enormous amount of work done by very dedicated engineers to make it run so smoothly and reliably.

  • @Nafeels
    @Nafeels11 ай бұрын

    Between this, Mazda’s SkyActiv, Alfadan, and LiquidPiston, I’m psyched that ICE engineers won’t go down without a fight. I’m super hoping that the Flat-8 engine makes it into production, which would make them one of the first company in decades besides Porsche and Lycoming to pursue this ultra-rare layout. If they do, I’d buy a sports car just to fit one.

  • @virtusetglorie

    @virtusetglorie

    11 ай бұрын

    And free valve

  • @joshuasimmons2412

    @joshuasimmons2412

    11 ай бұрын

    Check out achetes opposed piston engine it's a awesome design.

  • @tommynobaka

    @tommynobaka

    11 ай бұрын

    Realistically ICE will not be phased out like everyone thinks. The market will shrink, but ICE will have its place. I think its great that as consumers, we will have the freedom to either buy electric or stay ICE. Gas and Diesel stations will not go anywhere

  • @harrywalker968

    @harrywalker968

    11 ай бұрын

    i have a 351 c ford v8.. its 50 yrs old, no issues.. why do we need this bs.. all engines will run on lpg & produce oxygen out the pipe..so why spend trillions on all this inovative bs, hybrids, solar, EV,s wind, . its all garbage..endless power comes from sodium reactors,, we only have nuke because of weapons.. fact..

  • @NathanaelNaused

    @NathanaelNaused

    9 ай бұрын

    All they need to do is use hydrogen

  • @_miobrot_603
    @_miobrot_60311 ай бұрын

    That flat 8 engine looks legit! I sure hope the production run is successful for them so they can expand their market to USA and Canada etc. Truly exciting, and thanks for the update and continuation of the scotch yoke engines. I hope that the flat bearings are made to last, maybe a titanium alloy to withstand the heat and load?

  • @jonskid8929
    @jonskid892911 ай бұрын

    You are an engineer. Loved the design and your concise description, knowing the plethora of information you sifted through.

  • @shriramvenu
    @shriramvenu11 ай бұрын

    really great explanation of an interesting engine design! I wish SYTEC all the best.

  • @matthewbeasley7765
    @matthewbeasley776511 ай бұрын

    In your free body diagram at 13:30 - your missing the reaction force. You've caught that the piston is driven to one side, but you're missing that there is an equal and opposite force that's trying to push the yoke to the right. It would cause the yoke to pivot, and that's not good. It would turn the yoke effectively into a rod because it would come to rest with the yoke placing the pin / block in line with the wrist pin. In old steam engines, they resolved this one of two ways: - In single cylinders per throw, they put guides on the sides of the yoke that resisted lateral movement of the yoke. - In tandem opposed cylinders, the piston rods had guides. (Remember, old steam engines were double acting). In the modern equivalent, the opposed pistons are going to provide the bearing surface to resist the lateral force.

  • @haphazard1342

    @haphazard1342

    11 ай бұрын

    Thank you for pointing this out. It was a glaring omission from the explanation in the previous video as to how this force could be controlled. In the single-acting design, he has completely ignored the guide surfaces required for the yoke. This represents a second planar bearing surface that is subject to the same engineering constraints as the primary inside the yoke. It is admittedly easier to lubricate as one side is stationary, but represents a second wear surface and source of friction. As you point out, the double acting opposed piston design solves this problem by using the opposite piston to control the lateral forces. This introduces a potential torsion at the point where the pistons attach to the yoke "rod", which coupled with ease of manufacture makes a wrist pin sensible. I would not want to be the machine shop tasked with manufacturing the rod-yoke assembly if it were integral to the piston, and I would not want to be the mechanic who has to replace the entire rod-yoke assembly in the case of damage to the piston alone. Overall, the double acting design seems efficient in terms of reducing wear surfaces and efficient packaging. Whether the lateral forces on the piston can be managed effectively in practice is another matter.

  • @jebise1126
    @jebise112611 ай бұрын

    and i said 8 piston flat one would be perfect sense for it in that previous video

  • @TheDryOneGaming
    @TheDryOneGaming9 ай бұрын

    This is awesome. I just made a scotch yoke reciprocating saw for my senior project. Definitely didn't know that mechanism was being used for engines, super cool.

  • @unvaxxeddoomerlife6788
    @unvaxxeddoomerlife678827 күн бұрын

    I remember reading about these flat four scotch yoke engines in an Australian Fast Fours magazine in the late 90s. The Aussies have been working on these for a while.

  • @shimy333
    @shimy33311 ай бұрын

    Please do a video on Radial motion from Australia... I have been obsessed with their three piston radial engine ever since I saw a few days ago on Jay Leno with the new Myers Manx buggy... It sounds more amazing than anything I've heard in many years

  • @bondisteve3617
    @bondisteve361711 ай бұрын

    Thanks King. Really enjoyed this. Well done!

  • @thatotherguy4245
    @thatotherguy42453 ай бұрын

    An amazingly insightful and well researched video as always. Thank you for making this.

  • @incolink
    @incolink11 ай бұрын

    about 20+ years ago I had a job interview with CMC power systems and discussed the engine and its development don't think i got the job but the coolness of it has haunted me ever since I'm really glad to see it went a bit further I remember them saying they used Subaru heads for a few porotypes

  • @padders1068
    @padders106811 ай бұрын

    Great video and as ever very well explained! Keep up the good work! 🙂

  • @armandtdupreez1026
    @armandtdupreez102611 ай бұрын

    Awesome video. This is the nerd-out content that I enjoy the most, I'm so excited that there are still new combustion engine innovations that are being developed and proof tested. Thank you for the information and explaining it so thoroughly and passionately 👍

  • @paulcooper9011
    @paulcooper901111 ай бұрын

    I'm glad you acknowledged the off-centred crank position in the scotch yoke engine. I had thought that after a while and it bothered me with no way to see how this could be eliminated. The flat arrangement in this engine might help it a little by putting that friction across two cylinders but probably not by much.

  • @brianohehir9515
    @brianohehir95159 ай бұрын

    Man are you ever into engines, love your presentation!

  • @cannaroe1213
    @cannaroe121311 ай бұрын

    What a fantastic video, you were the perfect chap to document this engine, good job :) Your excitement reminds me of how excited I got when i first learned about sleeve valves, or the PatCam system, rabbit holes rabbit holes rabbit holes

  • @chrismckay3868
    @chrismckay386811 ай бұрын

    To overcome the rocking of the pistons during a power pulse it might be easier to create a double scotch design with guides to locate the rod and prevent it from rocking.

  • @wernertschan320
    @wernertschan3205 ай бұрын

    So much learning. With every video you post. Thank you so much for enlightening me!

  • @mattd1188
    @mattd118811 ай бұрын

    I want to love anything half as much as this guy loves engines.

  • @chir0pter
    @chir0pter11 ай бұрын

    D4A you really raise the bar with your videos. Thanks for all your hard work that I'm sure it takes to make such smooth and informative videos! 11:52 this is why ICEs will always be more interesting than EVs...designing, engineering & building parts that have to work in atom-space over millions of cycles is just inherently more aesthetic and fascinating

  • @connorbingel7134

    @connorbingel7134

    11 ай бұрын

    Motors are cool but not that cool. They also aren’t at all intuitive. Engines are just way more interesting

  • @nickrider5220
    @nickrider522011 ай бұрын

    Great find and very well explained.....this will be interesting 👍

  • @gregstandish6439
    @gregstandish643911 ай бұрын

    I am as excited as you are Mr. Driving 4 Answers. Very cool information.

  • @c.a.r.s.carsandrelevantspecs
    @c.a.r.s.carsandrelevantspecs11 ай бұрын

    Thanks for this fantastic video! This is the kind of engine technology that gets me excited for the future! Keep up the awesome work! 😃🚗🚙

  • @phantomforester9337
    @phantomforester933711 ай бұрын

    Thank you for extensively researching and pulling out the key factors that make the concept work. You have saved a lot of time for a Web explorer.

  • @S.ASmith
    @S.ASmith11 ай бұрын

    I think that bearing plate being made from Incoly or Inconel would work fine. Hard wearing, good temperature properties and they don't expand much when heated either.

  • @rocknral
    @rocknral11 ай бұрын

    Thankyou for correcting the friction issue that you missed. ( 12:23 ) I pointed out in your initial video this problem with a fixed piston/ rod arrangement.

  • @nickname3471
    @nickname347111 ай бұрын

    Thankyou for this fantastic content, 1st time I've seen this channel. Very well explained video.. I've subed.. Thanks again.. Cheers from Australia.👍

  • @RobertDerusha
    @RobertDerusha11 ай бұрын

    I think your explanation of the wrist pin might be negated by the opposed piston resisting any tilting of the scotch yoke. My guess for including the wrist pin is just to aid in maintenance and parts commonality. Love the vids bud 👍

  • @user-wf3fn6fy7i
    @user-wf3fn6fy7i3 ай бұрын

    Thank you @d4a for another great and educting video! I don't know if you are a contributer to wikipedia, but as you note there is no article on this engine, and I think it would be awesome if you would improve that marvelous encyclopedia with such an article. With your knowledge and talent in explaining complex topics, you could probably contribute to a heap of other existing and not-yet-existing articles as well. The wiki will only be as good as its users make it, you know😉 Keep up the good work!

  • @intrigue175175
    @intrigue17517511 ай бұрын

    Well done! Thanks for sharing, this is exciting!

  • @Hodenmaffia
    @Hodenmaffia11 ай бұрын

    Like always a really good and informative video. Keep it up mate! Greetings from germany.

  • @DJAizakku
    @DJAizakku11 ай бұрын

    The flat 8 is giving me massive 60s prototype racecar vibes. Im intrigued to see what it could do in a performance application.

  • @felixbaum48
    @felixbaum4811 ай бұрын

    Holy cow! Three Liter 8 Cylinder Engine at 130KG is amazing! Lighter than the lightest 8cyl mass produced, the Buick 215, by a huge margin!

  • @BuzzLOLOL

    @BuzzLOLOL

    11 ай бұрын

    A properly designed aluminum V6 would have been even lighter... as typical of Buick, they did it wrong...

  • @phugwad

    @phugwad

    11 ай бұрын

    I am quite familiar with the Buick, Olds, Pontiac, Rover, 215, 3500-4600cc engine, having swapped one into a Datsun 510 back in the late 70s. That engine weighed less than 144kg, fully dressed, not more.

  • @phugwad

    @phugwad

    11 ай бұрын

    If the point of this engine was to make electricity for range extender use, why use a crankshaft at all. Linear engines, no crankshaft, just a piston connected to rods with magnets, driving a linear generator, get rid of a huge amount of complexity and weight.

  • @BuzzLOLOL

    @BuzzLOLOL

    11 ай бұрын

    @@stevel6660 - The Buick V6 was a shiiite engine for it's first 25 years... ran like a V8 with 2 bad sparkplugs... shook back and forth 6 inches at idle... until 1988 when it got balance shafts to help smooth it out some... better idea would have been a crankshaft with 120 degree throws... then natural balance with no extra shafts or weak split rod journals needed... except it would have been so smooth would make it difficult to sell most people a V8 upgrade...

  • @BuzzLOLOL

    @BuzzLOLOL

    11 ай бұрын

    @@stevel6660 - Millions of aluminum engines were made for WWII aircraft... there should have been someone around to consult with... Britain found them... and the Buick 215" aluminum V8 started in 1950 for use in concept cars... hence why they had rocker shafts instead of individual rocker arms on studs...

  • @fredericrike5974
    @fredericrike597411 ай бұрын

    Awesome find and follow up on this one! Loved your take on "high tech" entries to the market place. I wouldn't have understood half of it if it hadn't been for your "long , boring , tutorials"- all your words, btw- on the vagaries of engine balance. Did the Sytech ("Scotch Yoke tech?) material have any comments on weight? I'm thinking a limited rpm engine could also have air applications as well.

  • @Cap.jose.Espinoza
    @Cap.jose.Espinoza11 ай бұрын

    Love your videos dude , really great edited and informative , it would be great if hou could talk about advantages and possible disadvantages of the Liquid piston engine and or the REX engine from INNE Engine sounds really intresting !!!

  • @redshift6170
    @redshift617011 ай бұрын

    The engine was used as a range extender engine back in… 2000. I thought it looked familiar, it was a concept car called the “aXcessaustralia II”. Not sure it has come very far in the last nearly 25 years since then unfortunately.

  • @DrTheRich

    @DrTheRich

    11 ай бұрын

    Could also be other issues, battery technology might not have been good enough for it to make a sellable car

  • @jimmydesouza4375

    @jimmydesouza4375

    11 ай бұрын

    @@DrTheRich Battery tech hasn't improved since the 90's.

  • @DrTheRich

    @DrTheRich

    11 ай бұрын

    @@jimmydesouza4375 ah yes, how could I have missed all hose lithium ion battery cars driving everywhere 30 years ago...

  • @jimmydesouza4375

    @jimmydesouza4375

    11 ай бұрын

    @@DrTheRich No idea, but you did. The original ranger EV which started selling in 97 had Lead acid (obviously), NiMH and Li-Ion options (though I beleive due to a lack of sales the Li-Ion option never went in to production). GM EV-1 (96) also had the same, was originally released with lead acid but was sold to buyers with the idea that they'd be able to replace the lead acid with NiMH after gen 2 (1999) came in to production (which happened) and then to Li-Ion when gen 3 (planned 2002) came in to production (once again due to a lack of sales never happened). Again, the technology hasn't changed, all that has changed is the marketing. Even the purported range increases only come about due to massive increases to the physical size and weight of the battery packs in newer EVs, because once again it's the same tech.

  • @DrTheRich

    @DrTheRich

    11 ай бұрын

    @@jimmydesouza4375 i never said liithium ion battery didn't exist back then. The technology back then to produce them at a viable scale, reliability and prive wasn't good enough to make it a sellable car... You point out yourself that all these cars that were promised to drive on lithium ion cars didn't actually go into production. So somehow it's weird for me to miss cars that weren't actually driving around. Probably because the technology to make those batteries back the wasn't good enough. Battery technology doesn't just include only the technology of the battery itself. It also means the means to maken them. Example: we know how to make graphite Right now. What we don't know is how to make it on a scale that's useful for any practical application. Aka the technology isn't good enough yet.

  • @frostyl4269
    @frostyl426911 ай бұрын

    your channel really is the best educational automotive channel out there imo. really clear explanations, detailed descriptions and diagrams to help understand stuff. been watching for a couple of years now and every video is just as engaging and fascinating as the first one i ever watched when i knew so little about cars. keep up the awesome content, it rly is top notch :D

  • @VadoVoodoo
    @VadoVoodoo11 ай бұрын

    Thank you for your educational and erudite introduction to this fascinating new engine.

  • @kevinmurimi2176
    @kevinmurimi217611 ай бұрын

    Trying to imagine the sound of a flat 8 cylinder engine makes me smile. Great video

  • @reisman44
    @reisman4411 ай бұрын

    Please look into the Taurozzi engine.The Petronas University of Malasya conducted tests to confirm its efficiency.Would really love a video from you on that engine.Great job as always.

  • @MadRat70

    @MadRat70

    11 ай бұрын

    Yes, these engines are much better than a scottish yoke. The concept hasn't even been given a real chance to strut its stuff. So simple yet ignored.

  • @ryndrssn

    @ryndrssn

    8 ай бұрын

    Malaysia*

  • @bardocz
    @bardocz11 ай бұрын

    I think one of the main reason, that the rod and piston is not a one piece unit is simply assembly. With the piston rings, it would be pretty hard (maybe kinda impossible) to assembly the piston into the cylinders.

  • @Bobdibob
    @Bobdibob11 ай бұрын

    My narrator - you're an absolute scholar, thanks for the vids!

  • @PikemanLures
    @PikemanLures11 ай бұрын

    I never knew I needed it, but I really need a 2-Stroke, Diesel, Scotch-Yoke engine.

  • @user-lo4er8wy9l
    @user-lo4er8wy9l11 ай бұрын

    Great content and an interesting engine. If the primary use case of this scotch yoke engine is range extension, then it is likely not going to succeed due to the added cost and complexity of having two power trains in car as well as the continued expansion of charging locations. Range anxiety for most consumers is overstated. As a generator, it may have some value.

  • @coltonkarges2656
    @coltonkarges265611 ай бұрын

    Couple other very interesting engines to look at… delta hawk inverted v4 twin charged (turbo and supercharger) 2stroke compression ignition received FAA certification last week… and the Higgs diesel 2 stage 2stoke.. currently doing engine testing… keep the new ideas coming!!!!

  • @jlo13800

    @jlo13800

    6 ай бұрын

    All these new 2 strokes are coming!

  • @tonyjennings8199
    @tonyjennings81999 ай бұрын

    Wow, what an awesome bit of tech!

  • @DoReid0
    @DoReid09 ай бұрын

    What an exciting time we live in, high horsepower in such a compact form. I'm very excited!

  • @user-ru3bv1bo8i
    @user-ru3bv1bo8i11 ай бұрын

    Amazing video and very interesting as always! Id like to know why the teeth of the gear box gears are in angle. Just a video idea. Again great video!!!

  • @d4a

    @d4a

    11 ай бұрын

    Mostly to reduce noise. This is why you get that sound when you drive in reverse. The reverse gear teeth are usually straight.

  • @patturk7408

    @patturk7408

    11 ай бұрын

    Yup. Straight cut gears do get noisy. I have fond memories of a straight cut M22 from the old days.

  • @DanielFrost79

    @DanielFrost79

    11 ай бұрын

    ​@@d4a Hence the sound of many racing gearboxes. No idea about you, but i love that sound. 😍

  • @DrTheRich

    @DrTheRich

    11 ай бұрын

    @@d4a Also reduced wear, constant contact means less vibrations to cause wear on the teeth.

  • @CyberChrist

    @CyberChrist

    11 ай бұрын

    @@DrTheRich Don't they also offer better strength?

  • @FallsGaming
    @FallsGaming11 ай бұрын

    Wow cant wait to see what Car manufacturer would implement this into their lineup!

  • @krisztiantkacs

    @krisztiantkacs

    11 ай бұрын

    Only Mazda is stupid enough for something like this 😅

  • @danhammond8406

    @danhammond8406

    11 ай бұрын

    It's been over 20 years since it was made. I'm betting it has been turned down by all of the manufacturers

  • @dcxplant
    @dcxplant11 ай бұрын

    Very informative! I really enjoy your content. Who do you think the CMC is on the intake of the flat-8? I'm curious to know the timing between Alfadan's contracting the EU engineering firm and Sytech's development schedule. 😉

  • @PDLM1221
    @PDLM1221Ай бұрын

    Yes this is great news ! Thanks for finding this as it’s not very common information. Rey good information that needs to be put out there for people to know who are looking to use this in their inventions that might end this motor to help bring to the market.

  • @connorruss5976
    @connorruss597611 ай бұрын

    Another reason for the the wrist pin you may have overlooked is for modularity reasons, allowing different pistons for different bore size or different piston crown design

  • @pizzablender

    @pizzablender

    11 ай бұрын

    Also manufacturing is a lot easier with wrist pins.

  • @idrifted1
    @idrifted111 ай бұрын

    You could probable model these 3 engines in the Engine Sound Simulator to find out how they'll sound.

  • @haphazard1342

    @haphazard1342

    11 ай бұрын

    Somebody page @AngeTheGreat!

  • @flyingfisherman100
    @flyingfisherman1004 ай бұрын

    Awesome, great find. Thanks for the video.

  • @kylesharp9771
    @kylesharp977111 ай бұрын

    God dammit this guy has to be the best engineheads from a physics standpoint and design analysis standpoint nobody does it better. Hats off

  • @torque350hp
    @torque350hp11 ай бұрын

    I can't help think having a wrist pin at this stage is just the easiest step in development to connect them.

  • @user-hb8sq6ce9u

    @user-hb8sq6ce9u

    11 ай бұрын

    yes, are the piston and crankshaft different material - at least they might be easier manufacture as separate parts and then should be connected in some way.

  • @asdf8asdf8asdf8asdf
    @asdf8asdf8asdf8asdf11 ай бұрын

    Great find. Shows you how much information could be hiding out there in the open despite having easy access to "everything" -- sometimes it takes awhile to find "everything" 😊 .... really appreciate the in-depth discussion But also curious how this relates to the more conventional "liquid piston" engine design.

  • @albertaraujo6358
    @albertaraujo635825 күн бұрын

    D4A, when our engineering team designed the ALFADAN piston rod assembly, they designed it in a way that almost eliminates the side loads and the twisting of the rod.

  • @Georgiaguntraining
    @Georgiaguntraining11 ай бұрын

    Excellent analysis. Thank you.

  • @taylorboultinghouse8296
    @taylorboultinghouse829611 ай бұрын

    Hello everyone! An excellent material for bearings and surfaces experiencing high friction is molybdenum disulfide. It is applied with vapor deposition. I found this material while dealing with LS7 8452 cylinder head issues. Specifically around the valves. This substance does not need to be applied with VD and can be used in powder form. With the valves, I can apply MoS with an abrasive on the valve guides and gain a margin of reduced friction. Power to the nerds!

  • @bigblue729
    @bigblue72911 ай бұрын

    I don’t think they necessarily need the wrist pin in this case. Since the engine now has two opposing cylinders, the rod flex or twist is now supported by two cylinders. That being said I’m glad you mentioned it because it was my first thought in your first video and absolutely would be a bigger factor on an in-line engine. The wrist pin could still be useful in assembly/disassembly as well as servicing the engine. A piston/rod assembly would be an expensive part to have to replace due to the complexity of it. The ability to use different materials from the piston to rod may also be a reason to split the two. You could also use commercially available pistons, reducing machining and repair costs. I’m curious to see the long term reliability of the sliding bearing since that seems to be the biggest question for whether or not this is really commercially viable. 500hrs of run time really isn’t that much and if it needs rebuilt soon after that time frame then maintenance costs will likely kill the engine design for most applications.

  • @MrJamesBanana

    @MrJamesBanana

    11 ай бұрын

    Yeah, 500hrs is nothing for an engine. Especially if that is in multiple different test cycles. Also, the two cylinder version will probably vibrate a lot since there is no way to get even firing intervalls for it. At least without making a two stroke engine of it. Also highly doubt an engine like this will be able to handle euro 7, those rules seems kind of strict.

  • @blinkybagger8342

    @blinkybagger8342

    4 ай бұрын

    Though the double ended scotch yoke rod has another piston attached (presumably )at an opposite point of the combustion cycle, the forces may be less even momentarily as the combustion forces do their thing. Wrist pins may reduce friction and improve assembly & servicing.

  • @finophile
    @finophile11 ай бұрын

    stunning stuff, thanks for posting

  • @Grateful.For.Everything
    @Grateful.For.Everything10 ай бұрын

    I feel like this Range Extender term is like a marketing pitch that paints a new picture of combustion engines, instead of being this thing people are rebelling against it gets hidden away in the back somewhere as this backup servant within an “electric vehicle” like it’s just some other component rather than the electric vehicle actually being ran by combustion. It will be exciting to see how this progresses.

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