I decided to try out a non-white background as some viewers say it's hard on the eyes in the dark. So what do you think, this background or the usual white?

@wojtech270

2 жыл бұрын

I really like the new one, its very fresh

@marioep18

2 жыл бұрын

I like this background too.

@danielkaruga7770

2 жыл бұрын

New one is even visible

@JK061996

2 жыл бұрын

The new background is nice and easier on the eyes

@johnnyblue4799

2 жыл бұрын

Looks good.

I like the relative simplicity of an oil cooled engine like the one in my 2001 Bandit, the fact that leaking gaskets will never result in water contaminating the engine oil, and that there are no water pumps or coolant hoses to corrode or fail. An ideal engine for me would be an oil cooled, fuel injected triple with a thermostat and a fan.

@beaterbikechannel2538

2 жыл бұрын

That's the most sense I've read on here for a long time

@soldrier

2 жыл бұрын

An oil cooled engine requires a higher volume oil pump and the increased temperature change of the oil leads to faster degradation. Almost all oil cooled engines have a thermostat. Ideally for power you need to go the liquid cooling path or if reliability is your thing then air it is. Oil is something in between.

@remedia1200

2 жыл бұрын

@@soldrier Degradation only for the oil. I'm running a suzuki oil burner on 15 psi of boost putting down 250 wheel - 250% of stock power. Oil lasts the same, and the only cooling mod is a larger 19 row racing transmission cooler repirposed to replace the stock one. I had the opposite problem where in fall the bike struggled to keep operating temp from the larger cooler. AFAIK no SACS motors used thermostats, not the 1157s 1127s 750s ect. EXTREMELY reliable, you can be pissing oil and aslong as it's topped off there's no issues. It's also better to not have to worry about deck types and headgasket issues without the waterjackets, never underestimate an old oilboiler.

@Ijusthopeitsquick

2 жыл бұрын

@@soldrier Something in between suits me fine :)

@soldrier

2 жыл бұрын

@@remedia1200 Yes indeed, only oil degradation failed to mention that. Now I don't know what engine we are talking about. I'm only aware of late 80s early 90s sport bikes being oil cooled. I mean in an essence all engines are oil cooled even the 2cv had a radiator. You're right about that it's harder to reach operating temps :).. Now from an engineering standpoint. Having more oil to cool the engine only leads to slower warmup time influencing emissions. Wear in modern engines is not so of a problems as KZread mechanics would lead you to be. Also heat in an ICE is highly localised. Yes you can use your bike at 250% power but for how long? Those new castings, open block designs etc. While bad for reliability, are an excellent solution to keep heat down on high powered engines. No wonder nothing else caught on. :)

In the 80's. There were two 911SCRS rally cars in the middle east. One was a factory car, the other a prodrive. The fatory 911 used to overheat in the Gulf rallies. Prodrive simply installed a huge oil cooler, problem was solved.Car won the championship for multiple years.

@scasny

2 жыл бұрын

well the more hotter the oil is it give less protection and lubrication that make more heat and create heat loop. Breaking the oil film loosing compression and power.

@theEVILone0130

3 ай бұрын

I've always wondered about super cooling an engine. I know it's not cost effective but if you could use liquid nitrogen cooling for the exhaust and cylinder head combustion chamber. And for that matter if you could use it on intercoolers for turbos and blowers where it ran through the equivalent of a intercooler that fits in a area below the throttle body so the intake air is cooled to close to 0°C before the fuel is injected.

@Barkevshadian

3 ай бұрын

@@theEVILone0130 That will be very interesting to see, I hope it's tested one day!

@MediocreTwink

2 ай бұрын

@@theEVILone0130Think about the drawbacks. If you carry Nitrogen as a coolant, it would have to have a compressor and a complex system to get low-pressure and high pressure zones to obtain said cooling and recycle the nitrogen. And if you just release the Nitrogen, you'd have to carry a heavy tank to store it, and be recharging the Nitrogen constantly. Sounds like a cool concept though.

When I was trained as an aircraft engine fitter, one of the first questions we were asked was 'what does the oil do?' and we were told that apart from lubrication it was used to cool the engine. With some large air-cooled aircraft engines the oil tank itself was 24 gallons or so and even though these engines used a lot of oil, the oil was cooled by an oil cooler and also by air flow around the tank. Notably gas turbine engines do run hotter in the turbine area but do not use the oil to cool the parts very much. The oil is often used to heat the incoming fuel as kerosene is not good at very low temperatures. However these turbine engines have very small oil tanks, normally only a gallon or two. As they don't use much oil, this is fine. Oil in modern turbocharged engines is also used to cool the turbine and compressor bearings but many of them also use water cooling of the turbocharger. These are especially useful on shut down where the oil can boil in the bearings and cause damage. But you are correct in saying that eventually the engine and its parts are cooled by ambient air.

@olafzijnbuis

2 жыл бұрын

For my Private Pilot License, I learned that oil: - lubricates - seals - cools - removes contaminants

@BeKindToBirds

2 жыл бұрын

There is a point in which oil is no longer sufficient for cooking either. After that the most common method is liquid cooling with the fuel. This is jet and rocket territory now but most turbines have a cycle to bring fuel through the engine to cool the turbine as well. Mainly again, in very very powerful turbopump engines and the like. Well past oil at that power level.

@davidkuhn3970

2 жыл бұрын

@@olafzijnbuis Beat me to it. Yeah learned that in high school mechanics class.

@fuzzy1dk

2 жыл бұрын

in gas turbine engines the oil is pretty much only to remove heat from the bearings, it's all ball and roller bearings so there is no sliding friction. The oil is also very thin

@leneanderthalien

2 жыл бұрын

aircraft air cooled engines are someting special because air cooling is not the best choice: at climb at full power is the cooling too low because low speed, at level flight is the cooling perfect but the badest moment is the descend before landing: oil is very hot, the engine is reduced to idle, then the cooling is much to high= the pistons are grow from the oil heat and cylinders shrink due to the airflow and the low heat in the combustion chamber= high risks to size the engine.To avoid this, are air cooled engines made with very large gaps between piston and cyclinder, this increase the overall oil consumption and increase the blow back in cold condition (and make the engine difficult to start in cold condition). A liquid cooled engine avoid such problems because a much better t° regulation, this explain why air cooled engines tend to disapear because they emissions are much higher on such engines because oil consumption+ run rich to avoid knoking...

Some nuclear reactors used by soviet submarines went as far as to use molten metal as the fluid for their cooling system for the sake of compactness. This meant that they could under no circumstance stop the reactor during the submarines' lifespan or else it would solidify.

@Franko384

2 жыл бұрын

That sounds insane. Is there any article, that can give me more information on that?

@juanordonezgalban2278

2 жыл бұрын

@@Franko384 en.wikipedia.org/wiki/Liquid_metal_cooled_reactor

@furkanfpv677

2 жыл бұрын

@@juanordonezgalban2278 thank you very much sir

@Jupiter__001_

2 жыл бұрын

Usually it was sodium or some other alkali metal. There were also sodium-cooled valves used in piston engines, which are not so common nowadays.

@iiii4047

Жыл бұрын

What the actual fuck

As usual your videos are great. I'm a mechanical engineer but since I'm from Italy this videos helps me to learn A LOT of technical words about engineering. Your videos are clear even for a beginner like me 🤣 Thanks for sharing your time with us and create these masterpieces!

@nanab256

2 жыл бұрын

"but since I'm from Italy this videos helps me to learn A LOT of technical words about engineering." Same with me from Poland :D

@fabiotiburzi

2 жыл бұрын

Ti consiglio il libro "motori endotermici" di dante giacosa. Un pò datato ma molto utile

@emanuele8226

2 жыл бұрын

Are you a mechanical engineer OR a beginner?

There is so much afford in each of your videos, always a pleasure to see a new one uploaded.

@quinndenver4075

2 жыл бұрын

What?

@teadrinkingilluminati9173

2 жыл бұрын

@@quinndenver4075 effort

@MurCurieux

2 жыл бұрын

The grammar and spelling is weak with this one.

@jort93z

2 жыл бұрын

@@MurCurieux true

I remember talking to a Porsche 911 930 owner. He told me, that the engine is oil-cooled, not air-cooled, because there is 14 liters of oil in the system. When normally in water-cooled 6 cylinder engines it's 6-8 and maybe sometimes up to 10 liters of oil.

@alienpoker

2 жыл бұрын

I like the comment ‘it’s blurry’ between Air/Oil cooled. I don’t think it has anything to do with there being an oil cooler. The Porsche 911 is both oil cooled and air cooled.

@3800S1

2 жыл бұрын

I think you are exaggerating those oil capacities by a few L.

@808bigisland

2 жыл бұрын

Those 3l Porsche engines are air-cooled. Compare a 6l small block uses ça 5l of oil, 6l if it got an oil cooler, 7l of oil if external filter and external oil cooler are present. 9l if you add a vaccum reservoir for the oil. I build my street racing small blocks with 7l capacity and a very flat oil pan and increased the water circuit by 4l with an external tank riding in the airstream. It's essentially a dry sump and heat radiation from the pan is lower. A finned sump cover could help but in my climate this was not needed. My cars run cool on a 35 Celsius day. 14l oil capacity on a Porsche means that the engine has some serious engineering defects. That's why I stayed away from racing Porsche and my motors and cars are simply better than what Porsche does. 500hp at 5600 and 900kg is fun. A 1800kg Porsche with 400hp/7000 is boring.

@soisaidtogod4248

Жыл бұрын

@@alienpoker Yup, air for cylinder heads, oil for block.

@soisaidtogod4248

Жыл бұрын

@@3800S1 No, my 911 from 1977 holds 13 litres.

I really wasn't expecting this video to be that dense of information and everything to be explained so well. Really good content keep up the good work!

I've been a subscriber for a while now. Your videos lately have been top notch! This channel will continue growing fast if you just keep up the good work.

8:57 Classic British bikes used a similar dual oil pump, but the high volume side was to scavenge oil from the sump to the oil tank. In my 1966 Norton 650SS high pressure oil is directed at the underside of the piston crowns to provide cooling, with the heat being dissipated to some extent by the oil tank.

I already knew this stuff, saw the video in my recommended and decided to watch out of curiosity and im positively suprised. Everything is explained simply and clearly. so much info for a 14 minute youtube video, it would take me likely something closer to and hour to actually explain all this stuff to someone who doesnt know it. thumbs up.

Always something of value to learn from your excellent presentations. I catch very few misstatements very occasionally and mostly pick up some facts or perspectives. Thanks. You start this presentation with a curious attribution of friction as the primary cause of excess heat. The rest of your presentation shows you know that combustion produces the lion's share of excess heat--the sixty to seventy percent inefficiency of the cycle. Friction's contribution is miniscule compared with that of combustion. In 1971, in a first-year thermodynamics class toward my mechanical engineering major, the professor asked this very question, that is, where does an internal combustion engine's excess heat come from. One of us students immediately answered, "friction." I vividly remember the professor's astonishment at our ignorance. He said something to the effect that if friction were producing anywhere near (within two orders of magnitude) the heat of combustion, the metals subject to such friction would quickly melt, bearing in mind that the local interface of frictional heat generation is instantaneously very small. Remember, too, that gas flow and introduction of evaporative fuel (as you detail) carries off most of the excess heat of inefficiency. Still, as you show, engine cooling is concentrated around the combustion chambers and exhaust ports. Along these lines, Rotax 900 series aviation engines utilize a hybrid cooling system; liquid cooled heads and finned, dry cylinder barrels sufficient to remove the residual heat of combustion carried into the cylinder walls (and, ok, that little bit of ring/wall frictional heat).

@vincentminarelli3217

2 жыл бұрын

Another thing i found strange is that he mentioned the fuel evaporation cooling effect, but not that the flame of the rich mixture itself burns cooler

@pacovuk123

2 жыл бұрын

Your comment is to the point, it was really a bizzare intro stating that friction is key heat generator in the internal combustiin engine. Total loss of credibility

@timduncan8450

Жыл бұрын

Totally agree with your comments about heat sources in ICE. But “Excess heat of inefficiency”? What are you trying to say on this?

Very nice presentation of the subject! Good balance between illustration and narrative. Audio quality is a treat.

Thank you for another informative quality video. These videos make my sundays perfect. Looking forward for the next one.

This is my new favorite channel. There is so much information in these videos

Hey D4A, really enjoying your videos. You could do a video about different petrol fuels, E5, E10 and E85 and what the difference is, how it affects combustion, when to use what and so on. I guess that would be quite interesting.

This man somehow makes my ADHD brain keep focused for more than 2 minutes on a complex engineering topic, puts it in a way I actually understand (I'm quite stupid) and makes it enjoyable in the process.

Most of the heat in the engine is from the combustion... Compressors that is basically the same as an engine but without the combustion do not get nearly as hot as a similar sized engine.

@samwilson8047

2 жыл бұрын

Friction is only a miniscule percentage of the heat rejection of an internal combustion engine. This kind of ignorance of basic thermodynamics drives me crazy.

Change is awesome when its good 👌🏽 Loved that you changed the background

Love the animations. Make it very easy to understand how internal processes work in engines. You always go above and beyond.

I love that you greet us as Engineers, I’m really a technician but I LOVE how educational your content is

Super clear and super interesting! Thanks a lot for the good work!

Another brilliant video Thank you for your time and effort.

Superb vid again. Excellent graphics and, as we have come to expect, clear and brilliantly thorough explanation. Also particularly nice to see the Suzuki engines and oil coolers pictured: I used to have a GSX-R1100G slab-side with the engine being talked-of in the vid (they have long-since gone to water). It was certainly light compared to its direct contemporaries, but I think I recall Suzuki claiming it as running cooler etc. If so, they must have been comparing against air-cooling only, as it ran a good deal hotter than any water-cooled bike I ever had, even at the time! (Still one of my faves...)

I’m a BIG fan of your channel. Your automotive presentations are the best balance of accuracy and accessibility on the web. Having said that, I was surprised to see what I consider a bit of a stumble in this video (engine cooling). Please tell me if you agree with these criticisms of this episode: Combustion, not friction, is the major source of engine heat. Lubrication, not cooling, is the major defense against friction. The function of engine cooling is to remove combustion heat from the engine. Properly lubricated piston rings don’t create engine-damaging heat, rather, they transfer combustion heat to the cylinder walls which are cooled by air or liquid. So, I think your focus on friction in relation to cooling is misplaced and potentially confusing to the uninitiated. No amount of cooling will save a poorly-lubricated engine. Please keep up the good work producing informative, no nonsense automotive videos!

Awesome video, thanks for the going so in depth on Air cooled engines

Nice video explained very well in a basic easy to understand way for the guys who are gaining experience. Good stuff 🙂

Very interesting and helpful video, thank you for posting!

Cool video as usual, gotta love your chill and breezy explanations ;)

I had a Suzuki that go around the problem with uneven cooling on the rear of the engine on an air cooled engine in an interesting way - the front cylinder was air cooled, but the rear cylinder was air/oil cooled. I have a DR650 now, and it has a weirdly large oil cooler for a 650cc engine. But that thing just won't overheat. I'm really digging the new background. I'd love to see more of this.

Very informative and detailed video. Love it.

Absolutely best explanation I've seen on the subject. Great!

This was an informative, and very compact video, packed with useful info. The sponsor spot was in a good place, but most importantly, the green background really felt good on the eye. Edit for spelling errors

Excellent comparison and explanation, many thanks!

This video is so interesting and well explained that I’ve even put lot of attention to the Squarespace sponsor ad included

Great video, and nice graphics with well-sorted dialog.

Thanks bro for this Detailed knowledge 🥰🥰🥰

I love this channel, the best explanations for many car engine topics, great videos my friend, Im a fan

I never thought all that much about my Suzuki bandit having an oil cooler but the details were even cooler than I thought. Great video, another interesting video with some new information.

You make automotive educational content that's very easy to digest, and as a young car enthusiast I sincerely thank you for that!

Great video!! Great explanation.

Really good job on your channel and videos!

Excellent upload, extremely informative, thank you. 👍

Very interesting and well presented....thank you Sir.

Great information! Thank you!

thank you for explaining it. easy to understand 😄😊

Great explanation thanks!!

amazing videos, interesting and informative, thank you 👍

I’d imagine that friction is a pretty small amount of the total heat rejected by a typical engine. Heat absorbed from compression and combustion will be the lion’s share of heat rejection.

@andrebello4191

7 ай бұрын

Exactly

Interesting and easy to understand video like always. I have owned several motorcycles and scooters since I was young. Some of them were air cooled, other water cooled... but I loved them all! I would like to share two ideas: some scooters have a special type of cooling system, "forced air cooling system". The forced air is provided by a small fan moved by the engine. The old Vespino had that interesting system. And many current scooters use that technology. The Spanish engineeres of the humble Vespino were very creative and invented the continously variable transmission. That mechanism is nowadays very common in the scooters and even cars. Nobody knows that this transmission method was created for this low displacement vehicle.

Another great example of your teaching skill.

excellent explanation

Great video, I didn`t know that there were engines actually circulating oil around the combustion chambers. I would add that the biggest advantage water has over oil as a cooling fluid is it`s thermal conductivity. Combined with the thermal capacity it makes water about 8 or so times better as a cooling medium. Keep up the great content, I am learning tons from each of your videos.

You explained it so well. I actually learned something; thank ya :)

Thanks, I learned some new things !

This channel is gold

very nice explanation.

This was the first video that I saw from you. Result: subscribed!

Excellent as always. Thanks

I have only watched a handfull of your vids which were good, you seemed to haved missed some important points early on but i will continue to watch

One more excellent learning video ! 👍🏻 Thanks so much

Your channel is excellent - thank you.

Another great video bro! I didn't know about the "oil cooled" engines with the dual chamber oil pump. That's really interesting. 👍

Impressive how much he knows and prepares for his videos. Top notch expert.

Fantastic video. The other disadvantage of air cooling (and advantage of water cooling) is increased engine noise as the cylinders aren't surrounded by a water jacket which acts to muffle combustion noise.

Great presentation thank you

Great information. Well done

This is premium content, thanks and keep it up!

Great video with much detail and simplicity of information digestion. I’m surprised you didn’t discuss how oil or liquid cool radiators needs a way to mimic air blowing into it while stuck in traffic or idling on a hot day which is where the radiator fans come in. I was so shocked not to see it discussed but still a great video none the less!

Amazing video. Thx

Another Gold Star...thanks...Looks better.

Great explanations, as usual 🎉

This channel is amazing in it's presentation and engineering content! Great to watch and learn!! 👍

@vincedibona4687

4 ай бұрын

*its - no apostrophe necessary

@johng.4959

4 ай бұрын

@@vincedibona4687 Correct!!

It's excellent, thank you!

I enjoy your videos and this time I actually have an addition to add. :) The VW air cooled engines are actually air cooled/oil cooled. They actually have a oil cooling tower in the fan shroud assembly. You can increase the cooling by adding an external oil cooler as well. This increases the oil capacity by ~ 1 - 1.2 quarts depending on the system, as you mentioned. It is a common practice in hotter climates and racing.

Fantastic explanation;!

beautifull video!

This video so easily understanding although my english bad, nice keep it up

Good video! As usual

Because of you I am going to mechanic school thank u

The best explain ever, Nice

your videos are very good , fantastic stuff.

I enjoyed this video

I love and enjoy your videos very much!! As physicist I'm of the opinion that in the present video the specific heat capacity, J/(K*kg) could explain matters better! Thanks a lot for your nice work!

@federicopelizza9563

2 жыл бұрын

i think that the numbers showed here were already specific heats, he probably forgot the kg part in the animation

Very interesting! Big LIKE

I just watched this video, one more from you, you are a genius to explain, thank you so much 🙂

I went in to this video just cause I was bored not thinking I was goin to learn, but I did. I thought oil cooled motors were basically just air cooled but they just passed through a radiator on the path to lubricate, i didn’t realize they had cutouts for the flow as well. Thanks for that knowledge

Very informative for a guy that just bought his first motorcycle and didn`t realize that it doesn`t have a fan until he brought it home.

You even covered Suzuki's SOCS which were used on their older bikes and the new GIXXER 250, nice!

great video

I love your videos by the way. What about coolant fluids that you can use instead of water?

Yeah, green is the go! Another great video you utter champion!

Yay! I understood everything!

Air cooled fan here! I love this System. Sincerely, every system has disadvantages, we need to choice one who has disadvantages that are not bad for us.

The heat of combustion is by far the biggest source of heat in an internal combustion engine - friction accounts for about 5% of heat generated in an engine. It is possible, at ambient temperatures, to only convert about 25% of the combustion heat into mechanical movement. This was first theoretically understood by Léonard Carnot. The rest has to be dissipated. Typically about 40% of the heat of combustion goes into the exhaust gases, 30% into the cooling medium (air, oil or water), 5% into friction, and the remaining 25% as mechanical energy.

I own suzuki bandit….such a good engine

He didn’t say it directly but did imply that running lean makes things run hot. I just want to put out there that very clearly running lean DOES NOT MAKE YOUR ENGINE RUN HOT. Engineering Explained has an amazing video that breaks down the whole situation. The TLDR version of EEs video is running leaner then what your currently at (usually 12-10:1 afr) will mark things hotter until you hit 14.7:1 and then it cools back down and once your at like 16-20:1 your actually running really cool as well. I really like this video over all its very informative and well put together I’m not trying to hate on D4A I just want clear accurate information available to everyone.

Thanks for educating me, I knew the original Porsche 6 had a enormous amount of Oil in the engine, now I know why. When Tucker starting using the Hughes Helicopter engine they first add a water jacket to aid in cooling

👍 Thanks very much!