Wrong! All the power goes to the ice. Torsen is 3:1, you show 1:3, again incorrect. Open diff. is 100:0, all power to the ice!!! Engineer, you explained it wrong! Back to school!

@4x4.tests.on.rollers

5 ай бұрын

This is about *TORQUE* , not power so it's your time to go back to school. Lesson for you about open differential: kzread.info/dash/bejne/mqebo6OKZb3gd5M.htmlsi=L_gXMje-vDT3c4B2

Did anyone else want him to say “And now you are pressing accelerator pedal 100%”

I've been watching videos trying to comprehend how the differential could both differentiate speeds but also be able to "lock" to keep from getting stuck in low but non-zero traction situations and the "easy" ones to understand kept confusing me but this actually made it make sense

I don't have a 4x4, but I love your videos.

@4x4.tests.on.rollers

4 жыл бұрын

Thanks!

@jerryl6634

4 жыл бұрын

Lucky you! Four wheel drive cars are dangerous!

@jaahasjaahas8729

3 жыл бұрын

@@jerryl6634 Not if you know how to drive with one.

@dkdanis1340

3 жыл бұрын

@@jerryl6634 why the f would they be dangerous.

@melody3741

Жыл бұрын

This applies to all cars not 4x4

"at first you are pressing accelerator pedal gently like 20%" loved that

@4x4.tests.on.rollers

3 жыл бұрын

Is that wrong in terms of English language? 🙂

@rowanationer

3 жыл бұрын

@@4x4.tests.on.rollers ha yes it's when i realised that it was a translate thing. the guy speaks perfectly so you notice it. Great video though!

@bielik_2

3 жыл бұрын

@@rowanationer I think he used 20% as a reference because it would be easier to explain with the Nm values he used.

@mayankp1000

2 жыл бұрын

@@4x4.tests.on.rollers missing article "the " before accelerator

@funkypotamus

2 жыл бұрын

@@4x4.tests.on.rollers we understood you perfectly. Ignore these morons. Thanks for the great videos.

simple and clear👏

Fantastic explanation!!; Many thanks!.

It makes sense and it’s easy to understand.

Brilliant!! 🙌

Hello ! I want to put the diffential autolock Torsten on my duster because I put my car to the soft sand with my boat . It’s ok for me or no

@4x4.tests.on.rollers

5 ай бұрын

Hello, torsen is not a locking diff: kzread.info/dash/bejne/o6Z2stKBmLjKhLw.html

Awesome explanation! Thank you!

Love the channel! Now please demonstrate the theory in this video with real life scenarios.

@4x4.tests.on.rollers

4 жыл бұрын

Winter is coming, I'll think about that!

@MrSabaDap

3 жыл бұрын

@@4x4.tests.on.rollers there is always mud

I have one question , in clutch style lsd for example when taking turn lsd doesnt fully allow both wheels to rotate at completely different speeds , it still creates some bind due to being limited slip. Does torsen allow this like an open diff to take turns without any bind and when lets say traction is different it can send 3x torque to wheel with good grip while also allowing full speed difference between 2 tyres when taking a turn and not bind?

@4x4.tests.on.rollers

6 ай бұрын

Quotation from technical docs: "In turning situations, the outside wheels of a vehicle travel over more distance than the inside wheels. Accordingly, the inside and outside drive wheels must rotate at slightly different speeds (i.e., differentiate) to maintain rolling traction with the road. A torque division between drive axles at the bias ratio is a precondition for differentiation under all circumstances of operation. Essentially, in order for one drive wheel to rotate faster than the other, the drive wheel having greater resistance to rotation slows with respect to the differential case and transfers torque to the other wheel contributing to its faster rotation. The Torsen differential resists transfers of torque between drive wheels in proportion to the torque applied to the differential housing, and this results in a larger proportion of the applied torque being delivered to the slower rotating drive wheel. Therefore, bias ratio should be selected to provide the maximum traction advantage that will still allow both drive wheels to deliver significant portions of engine torque in turns. However, even in turning situations, the Torsen differential enhances traction management. Since torque is already distributed in increased proportion to the inside drive wheel, it is exceedingly unlikely that the outside drive wheel will ever exceed available traction and 'spin up'. Alternatively, should the torque of the inside wheel exceed available traction in a turn, it is equally unlikely for this wheel to 'spin up' since such a 'spin up' would still require a difference in traction between drive wheels which exceeds the bias ratio. Ordinarily, when the inside wheel exceeds available traction, differentiation ceases and torque is divided in more even proportion between drive axles determined by the maximum torque that can be sustained by the inside drive wheel. Thus, in all directions of travel, the Torsen differential will resist 'spin up' of either drive wheel by instantly dividing torque between drive axles in proportions up to the bias ratio to match prevailing traction conditions".

@288gto7

6 ай бұрын

@@4x4.tests.on.rollers thank you so much for the information 👍

I think you need a speed difference before the torque transfer occurs in the torsen diff. So that means you need to loose traction on the left wheel before the right wheel can get more.

@4x4.tests.on.rollers

4 жыл бұрын

There is kind of "initial lock" (up to TBR level), so torque is transfered asymmetrically if there is traction difference between left and right wheel.

@daniel.dybvik

4 жыл бұрын

Kind of a static fiction inside the diff that has to be overcome before the wheels can spin at different speeds?

@4x4.tests.on.rollers

4 жыл бұрын

@@daniel.dybvik Yes. It is clearly stated on torsen website and in some detailed technical descriptions from late '80s which I used for this video.

@daniel.dybvik

4 жыл бұрын

@@4x4.tests.on.rollers thanks for the clarification :)

@totaldla

Жыл бұрын

Somewhat confusing because you are thinking like a clutch-style LSD. Torsen or Truetrac, as soon as the wheels turn enough for the worm gears to react to a speed difference the torque split happens. Near zero. That is why a little parking brake can allow you to crawl out of a one wheel up situation.

My question is: prioritizing security in bad pavemented roads when you frequently have to pull the car to the sude of the road, so 2 wheels in pavement and 2 wheels in dirt, what system is kore secure? I had a Volkswagen Amarok that i just used for company trips and it saved me in this situation countless times.

@4x4.tests.on.rollers

4 ай бұрын

The situation you described is a job for front and rear differentials. These diffs are usually open, including Amarok, so everything is up to effective traction control system.

So, torsen diff only works when both wheels have any torque. In case that one wheel is in the air, loss of traction happen similary as a open dif?

@4x4.tests.on.rollers

Жыл бұрын

If one wheel is in the air then there's just a small value of torque needed to spin it. And even if this value is multiplied by TBR, it is still too low to spin the other wheel.

@galera_offroad

Жыл бұрын

@4x4 tests on rollers channel thank you! This is what I was looking for. So need to find other option for offroading .. as usually we have one wheel in air

Well explained

Does this scenario also apply to fwd or rwd vehicles with torsen differential? Torsen is said to work like an open differential when there is no traction (in mud, ice).

@4x4.tests.on.rollers

Жыл бұрын

Yes, of course, it applies to every application of torsen. Torsen never works like open differential, it is explained in the video (traction lost). Final result (only one wheel spinning) may be the same as with open differential but even then the torque split inside is very different.

@mtnturk

Жыл бұрын

Thanks for your relevant reply.

Does Torsen C have 3:1 ratio?

@4x4.tests.on.rollers

3 жыл бұрын

Yes, and due to asymmetric design it gives 70/30-15/85.

Hello guys, I wanted to make a silly question, if i choose to upgrade the differencial in my lada niva i need to do it both in the front and in the back differencial or only in the back?

@4x4.tests.on.rollers

Жыл бұрын

You mean replacing open by torsen? You can do rear, you can do both.

@leventis1991

Жыл бұрын

@@4x4.tests.on.rollers Thank you for your prompt response!

All I know is I have a 16’ RAM 2500 6.7L 4X4 Laramie Longhorn with the “anti spin” differential. (Verified via window sticker and VIN lookup.) Anyway, I turn traction control off, power brake to ~10psi and then let her eat. Driver side leaves a DARK strip while the passenger side leaves a much fainter one. Reason I’m here… Haha!

I have a question. In the open diff scenario, if I apply 50% throttle, the engine put out 50nM torque totally right. each wheels can maximumly receiving 15 nM, total is 30nM, so where does the 20NM go? or at this moment, is the engine sending out 50 NM torque or 30 NM torque even I apply 50% throttle?

@4x4.tests.on.rollers

Жыл бұрын

It's 30. If traction is lost then there is less resistance. Engine cannot generate more than the resistance (grip) allows. If you apply 50% then the only result will be faster spinning of the wheel with no grip.

@franklinchen2898

Жыл бұрын

@@4x4.tests.on.rollers Thank you very much! I've always confused about this, but now I understand. If the engine is just spinning without attach to any thing at 5000rpm, it's only delivering power but 0 torque right? Wish your channel grow to 100k soon😃

@4x4.tests.on.rollers

Жыл бұрын

@@franklinchen2898 Right 🙂 Well, zero is the theoretical value cause there is always some resistance but torque is very low. Thanks!

Czy to możliwe żeby przy paleniu gumy w torsenie kręciły się oba tylnie koła (samochód AWD z przewagą mocy na tył, nawet do ok. 90%)? Przy otwartym dyfrze kręci się tylko jedno, ale czy torsen umożliwia kręcenie się obu? Mowa o asfalcie, mocy ponad 400KM i może lekko zjechanych oponach 🤔

@4x4.tests.on.rollers

Жыл бұрын

Jeśli będzie miał wystarczająco wysoki TBR....

Does the Torsen lower the towing capacity of the vehicle it's on?

@jeffd1467

Жыл бұрын

It does not. It will actually greatly increase traction capability for the vehicle while towing. Especially at boat ramps or any off road scenario.

Czyli jeśli dobrze rozumiem... najlepiej jak taki Torsen, lub co popularniejsze, Torsen w centralnym dyferencjale, wspomagany jest hamulcami(kontrolą trakcji)?

@4x4.tests.on.rollers

4 жыл бұрын

Zgadza się, tak jak i otwarty dyfer. Aczkolwiek w najnowszych wersjach torsena są tarczki cierne, ale nie wiem jak się to ma do hamulców.

@krys8870

4 жыл бұрын

No tak, ale chyba w otwartym d. Hamulce mają więcej roboty (dla tego samego efektu muszą zadziałać silniej).

@4x4.tests.on.rollers

4 жыл бұрын

@@krys8870 Tak, zdecydowanie, chociaż to też zależy jaki TBR ma torsen.

i wonder would it be a good center diff(replace transfer case) if it was made with a torsen ? i wonder

@4x4.tests.on.rollers

4 жыл бұрын

There are many cars which has torsen as a center diff.

@buder5116

4 жыл бұрын

@@4x4.tests.on.rollers nice i wanna see 1 :D

@4x4.tests.on.rollers

4 жыл бұрын

@@buder5116 Many of Quattro systems are based on torsen, you can find them on my channel 🙂

@vadimnesen8060

2 жыл бұрын

@@4x4.tests.on.rollers 4runners audi porche have center torsens

@4x4.tests.on.rollers

2 жыл бұрын

@@vadimnesen8060 Volkswagen, Alfa Romeo, Mitsubishi, Lexus, Range Rover, Chevrolet...

Hey man, i think if %15 is the max torque of the rear left tire car will send %50 torque to the rear right and %50 torque to rear left tire and brake rear left tire to %15 with Electronic differential (brake controlled) what do you think?

@ozkanugurcetin2842

4 жыл бұрын

Cuz if you say no even with Electronic diff lock rear right tire will get %15 torque at max scenario car Electronic differential lock has no use

@ozkanugurcetin2842

4 жыл бұрын

Torsen has advantage for the scenario if left tire has max %20 torque limit not to slip, then 1:3 ratio torsen can send %60 power to the right tire but with edl max torque of right tire can be max %50 cuz this is an open differential

@4x4.tests.on.rollers

4 жыл бұрын

Hi, I do not understand your question. Any value above 15 for the left tire means slippage. If you apply brake to the left tire then you will increase the max value from 15 to 20 e.g. (brakes prevent from spinnning). So open diff will split 20/20 (max 40 from the engine) while torsen up to 20/60 (max 80 from the engine).

@ozkanugurcetin2842

4 жыл бұрын

@@4x4.tests.on.rollers if car has edl since max torque split of one tire can %50 with open diff, then car can able to send %50 of the power to one wheel and brake other %50 powered wheel to %15 to avoid the slip thats what i am saying

@4x4.tests.on.rollers

4 жыл бұрын

@@ozkanugurcetin2842 You can't "brake to 15". You have to "add" braking force and traction together. This will be one, increased value. And the same value will go to the right if it is an open diff. I will do another animation about it :)

With torsen, being mechanic, torque coming from crankshaft, the torque shift to the side with more grip cannot happen without wheelspin on the slippery side. Do we agree?

@4x4.tests.on.rollers

4 жыл бұрын

No, we don't 🙂 That is torque sensing diff, not speed sensing.

@samin2173

4 жыл бұрын

@@4x4.tests.on.rollers Awesome, love to discuss the matter! With torsen, can you please elaborate at what stage before the wheel slip does the torque split happen and what mechanical element decides which side gets more torque. With love, S

@4x4.tests.on.rollers

4 жыл бұрын

@@samin2173 The answer is in the video 🙂 Any stage above 15 units on the left wheel (so any above 30 units from the engine). When it comes to mechanics - that's more complicated, generally all elements...

@samin2173

4 жыл бұрын

At 2:05, I bet my hairy old dog that torque coming from crankshaft, the torsen rear diff cannot pre-see which side will slide. Yet you are stating that it can. It cannot. Therefore other side will slip first, then the worm gears with worm wheels will do their thing. The torsen thing. But you cannot state that torsen is pre-emptive, because it is not.

@4x4.tests.on.rollers

4 жыл бұрын

@@samin2173 Torsen is "locked" up to its TBR ratio. That's why it won't slip as soon as open diff. That's not any "pre-see" but initial "locking" effect. Everything is clearly stated on torsen website. Locked diff would do the same, you could even apply much more torque in such situation and left side would get only 15 (its TBR is infinity:1).

I still don't get one thing. Does the torsen or LSD have worse performance in turns than open differential? Lets say the both wheels are on dry asphalt road. IMO because the slip is limited, then in sharp turns the difference between speed of each wheel might be such high that wheels will behave like with welded differential which is something that I don't want in turns.

@4x4.tests.on.rollers

3 жыл бұрын

Torsen or lsd are not lockers, they won't behave like welded diffs. They may limit speed differentiation between the wheels but not lock them.

@jaromirandel543

3 жыл бұрын

@@4x4.tests.on.rollers I mean, what if the limit is too high?

@4x4.tests.on.rollers

3 жыл бұрын

@@jaromirandel543 That must be some really strong lsd, designed for some special purposes.

@jaromirandel543

3 жыл бұрын

@@4x4.tests.on.rollers O.k. Thanks.

What part consumes 70 - 52 = 18 Nm? Does it go to heat Torsen differential itself?

@4x4.tests.on.rollers

3 жыл бұрын

No, the point is that it is not possible to apply 70, not enough resistance.

@trippychips

2 жыл бұрын

@@4x4.tests.on.rollers how does people use torsen on their driftcars then? 🤔

@4x4.tests.on.rollers

2 жыл бұрын

@@trippychips I'm not in a drift thing but I suppose that they may be using torsen with high TBR ratio.

Why on left car , after the loss of traction , the wheel on tarmac goes from 45 to 39 nm ?

@4x4.tests.on.rollers

Жыл бұрын

1:45

I’ve watched this video a 100 times and still only slightly smarter then the previous time

@4x4.tests.on.rollers

Жыл бұрын

But is it clear?

@thatdonnyguy

Жыл бұрын

@@4x4.tests.on.rollers while I’m watching yes. It’s just easy to forget

Btw if you have an Audi with torsen diff, it doesn’t mean you have a torsen rear differential. Usually the torsen is central diferential so it sends power to the front and rear depending on settings in a similar way. The cars with rear LSD are usually sport models and you may need to buy that option. Otherwise, the central differential of an xDrive from BMW works similarly except it has different settings because of different weight distribution. But not sure for xDrive if the split occurs before loosing traction on one axle?! On low end models (audi and bmw) a cheaper differential is used that only drives the front axle most of the times (haldex or bmw similar awd).

@4x4.tests.on.rollers

4 жыл бұрын

Video is about torsen and open diff rules, if someone is wondering how that works as a center diff - just say in your head "front axle" instead of "right wheel" and "rear axle" instead of "left wheel". When it comes to xDrive - it doesn't have center differential.

@rotorblade9508

4 жыл бұрын

duszaniespokojna - 4x4 tests on rollers yes you are right. It’s called a transfer case, I thought it had a differential mechanism. Anyway it should perform similarly, not like an open differential but more like an lsd.

@4x4.tests.on.rollers

4 жыл бұрын

@@rotorblade9508 xDrive is Actimax (with some exceptions) from Magna Powertrain and actually it can lock itself.

@rotorblade9508

4 жыл бұрын

duszaniespokojna - 4x4 tests on rollers thanks, Yes. I just watched some animations with the xdrive and the torsen with the worm gears. So the xDrive has a locked rear and front torque is controlled through clutch plates.

Why is 13Nm torque applied instead of 15Nm after traction lost for the wheel on the ice

@4x4.tests.on.rollers

4 жыл бұрын

There must be a resistance too apply torque. Wheel which is already slipping has less resistance then before traction is lost, that's why torque decreases.

@rotorblade9508

4 жыл бұрын

The dynamic friction coefficient is smaller than static friction coefficient for smooth or relatively smooth surfaces. Dynamic=when the surfaces slide (wheel spin). However, on high snow and moderate mud, at higher spin, the coefficient increases again probably because the centrifugal force throws the snow/mud from between the tyre profile pattern.

@4x4.tests.on.rollers

4 жыл бұрын

@@rotorblade9508 Or the tyre diggs deeper to the surface with better traction 😉

@dogukancay

4 жыл бұрын

@@rotorblade9508 Thank you for the explanation that has so physics exactly:) for that reason ı can understand.

@dogukancay

4 жыл бұрын

@@4x4.tests.on.rollers Thank you so much. I love your every video these are so specific:))

I have f 150 2019 rwd and when i floor it the power go left then right then left then right then left then right

@Jack_sparrow-am-different

10 ай бұрын

Idk is it torsen or someone similar .i dud some research and i guess limited slip

Maybe i have the limited slip

I thought torsen was for drifting ?

Nice. but why will it be 13Nm at 3,08 min into the video.

@4x4.tests.on.rollers

3 ай бұрын

Because traction is lost so friction coefficient goes down.

Not only Torsen (TM) - almost all another limited slip differentional have the same characteristics. And all of them are "torque sensing" too.

@melody3741

Жыл бұрын

Yes, but in a much simpler way. They also create heat and friction when not necesarry on full grip surfaces.

@dmitrypopov2614

Жыл бұрын

@@melody3741, Heat is a consequence of friction, and friction is the basis of the blocking effect. It doesn't matter how friction is created, what matters is its presence. All lsd are the same in this. Unfortunately, they all have low friction on ice when needed, and high friction on pavement when not needed. This is due to the magnitude of the moment transmitted through the mechanism. The only difference is the preload. it is an attempt to correct the characteristic by creating friction when needed. But there are Torsen with preload, and for example, cam lsd without preload.

In case of open diff, lets say engine is producing 40 Nm torque. Now, since it splits equally, 20 Nm go to each wheel. The wheel on ice starts to spin whereas the other doesn't. On the left wheel, we have (20 Nm-15 Nm=5 Nm) of net drive torque which produces wheel angular acceleration. On the right side, since we don't cross static friction torque, 20 Nm is insufficient to spin it. Why would engine torque go down to 30 Nm? Engine torque produced should just depend on the rpm at which we are. Right?

@jasvirvirdi6744

Жыл бұрын

I am under the impression that the engine drive torque is split equally when open differentials are used. Is that right or is load torque split equally?

@4x4.tests.on.rollers

Жыл бұрын

@@jasvirvirdi6744 Engine cannot create torque if there is no resistance. Resistance comes from grip. Less grip means less torque can be generated. Torque split of an open diff is always 50/50, value is limited by the wheel with less grip.

@jasvirvirdi6744

Жыл бұрын

@@4x4.tests.on.rollers Thank you! I will read a bit more on this

Teraz pytanie, jak sobie poradzić z otwartym dyfrem, żeby jakoś go "przyblokować"? Oprócz spawania XD

@4x4.tests.on.rollers

4 жыл бұрын

To zadanie dla TC, EDL, BDL i całej masy innych nazw dla systemów wykorzystujących w tym celu układ hamulcowy 🙂

@patrykwitkowski2806

4 жыл бұрын

@@4x4.tests.on.rollers Tutaj bardziej myślę, aby wykorzystać przekazywanie momentu przy wyłączonych systemach bezpieczeństwa :). Nie sprecyzowałem, ale dzięki za tak szybką odpowiedź!

@4x4.tests.on.rollers

4 жыл бұрын

@@patrykwitkowski2806 W wielu dzisiejszych samochodach nie da się ich całkowicie wyłączyć. Ale otwarte dyfry wracają do łask z uwagi na rozwój elektroniki.

@patrykwitkowski2806

4 жыл бұрын

@@4x4.tests.on.rollers W moim z tego co wiem jest taka możliwość. Mowa o BMW E90 :). Problemem jest właśnie otwarty dyferencjał, przez co uślizg tylnej osi jest bardzo ograniczony i lepiej własnie to wychodzi z uśpionymi lekko systemami, gdzie hamulce będą ładnie dohamowywać. :)

Do Porsche AWD

Torsen is a tricky thing :)

@An.Individual

4 жыл бұрын

I agree it is but also interesting. The video is very simplified :-)

@4x4.tests.on.rollers

4 жыл бұрын

@@An.Individual Values are simplified, not the rules 🙂

@fabulousoffroaddesigns5080

3 жыл бұрын

@@4x4.tests.on.rollers good video. I will share it. You didn't mention that you can use ABS brakes to trick it to transferring more torque. I love mine in my F-150.

@4x4.tests.on.rollers

3 жыл бұрын

@@fabulousoffroaddesigns5080 Thanks. ABS/brake intervention will be in separate video some day 🙂

Put that pedal to 100%!!

@4x4.tests.on.rollers

3 жыл бұрын

Purpose?

"an open differential always sends 50% of the power to both wheels." Um, I'm not so sure about that. On a straight, equal traction surface? Yeah but if one wheel looses traction, that wheel will spin out and the other one will get far less power to it. It's kinda how an open differential is constructed. The wheel that moves faster, gets more power because it's what makes turning the vehicle left or right so effortless and not noticable. You don't have to adjust the position of the accelerator pedal to maintain speed throughout the turn, the diff does it for you automatically.

@4x4.tests.on.rollers

Жыл бұрын

Video is about torque split, not power split.

The situation with the open differential is far worse than demonstrated. An open diff will not "always split torque evenly"; that is what a spool, or fully locked differential does. Rather, an open differential will direct all torque to the wheel which has lost traction, so that once the traction limit for EITHER wheel connected to an open differential is exceeded, both wheels stop moving the vehicle (the slipping wheel because it is slipping and the wheel with traction because it is now stationary). That behavior is wonderful for road manners, as allowing the wheels to spin completely independently allows the different path lengths to direct how much each wheel spins, but it is beyond awful for off road. It is also important to note that if either wheel on a torsen diff loses ALL traction, then both will stop in the same manner as an open diff described above. However, even a tiny amount of resistance to the spinning wheel's rotation will cause the torsen to engage and direct torque, which allows for the technique of apply gentle brake while accelerating with a slipping torsen wheel to cause the diff to engage.

@4x4.tests.on.rollers

2 жыл бұрын

Not correct, that's a common mistake. Torque split of an open differential is always 50/50 (TBR 1:1). What varies is the rotational (angular) speed thus the power, not the torque. Torque split of a spool or locked differential is from 100/0 to 0/100 what means that all the torque can go to one wheel while rotational speed of both wheels remains the same. This video should help: kzread.info/dash/bejne/mqebo6OKZb3gd5M.html When it comes to torsen - it is explained in the video what will happen when traction is lost. That's not the same as open differential but the final effect may look the same.

@amschind

2 жыл бұрын

I understand what you are saying and agree, but in practice the power to the wheel with traction can fall to zero, such that the theoretical torque directed to the wheel with traction is meaningless because it has zero power.

@4x4.tests.on.rollers

2 жыл бұрын

@@amschind OK but the statement that _open differential will direct all torque to the wheel which has lost traction_ is completely false. What will happen when one wheel has zero traction is explained in 1:37. There's no theoretical torque directed to the wheel with traction, there's a real torque but with value limited by the wheel with no traction.

There is a physics error you made, power will always flow thru the path of least resistance, so therefore in an open differential power sent to the rear axle, say 50 the split should equal to the amount of torque given by the engine, in slippery conditions one wheel on snow the power should split 20:30 or 10:40 etc depending on the coefficient of friction, if both wheels are on tarmac power split is 25:25. An open differential(in slippery conditions) can loose power upto over 95%, it can never be 100% because some power is lost thru heat because of the moving parts, therefore, when an engine produces 50, in an ideal open differential the maximum power loss when one wheel is slipping should be about 47.5:2.5(case example) Please make the needed corrections.

@4x4.tests.on.rollers

4 жыл бұрын

I don't get your point. In this simplified model the amount going from the engine equals the amount on both rear wheels (sum). And in case of open differential 50% of torque goes to the left and 50% to the right. Always.

@dmitrypopov2614

4 жыл бұрын

This video is about TORQUE split, not POWER split. Power= torque x angular velocity (revolutions). Open differentional always has 50/50 torque split. And torque can be on a fixed wheel too.

@edu.g6082

4 жыл бұрын

@@4x4.tests.on.rollers True to your statement, however check your video at about 1:40, You say when 30Nm is produced from the engine due to loss of traction, power drops to 26Nm from the engine, Now power output from the engine does not in way rely on the traction of any of the wheels

@4x4.tests.on.rollers

4 жыл бұрын

@@edu.g6082 Everything is correct in the video. Listen to the full sentence and its correlation with animation, not just two seconds long part. If still something is not clear - please precise your question.

@edu.g6082

4 жыл бұрын

@@4x4.tests.on.rollers I REST MY CASE. Let somebody else be the judge.

There is a mistake. Open diff has 50 / 50 split only when both wheels has the same traction. So on the open diff picture max torque transferred to right wheel is equal to max torque of left wheel traction. For example, If engine produced 100nm (or 1000nm - no difference) - right wheel will get not more then 15nm - the min torque needed to left wheel to lose traction. So if your car will be on the lift - you hold the wheel by you hands even with engine being on the full throttle. The only resistance you get is torque needed to make wheel spin, and some mechanical loses.

@4x4.tests.on.rollers

3 жыл бұрын

No, there is no mistake. Torque split of open diff is *always* 50/50. Value on wheel with grip is limited and equal to value on wheel without grip. Locked diff has 50/50 torque split only when both wheels have the same traction and load.

@resistorstudios

2 жыл бұрын

@@4x4.tests.on.rollers i have open diff on my blazer. Its more like 100% traction on the passenger side, always. Period. Driver side NEVER turns under any circumstances. I know that its always 50%50% but it definitely doesn’t feel that way when you’re sitting there in ice or rain and one tire just spins.

@4x4.tests.on.rollers

2 жыл бұрын

@@resistorstudios That's the problem. Tire with good grip gets the same amount of torque as tire on ice. That's why only one spins.

Wrong. If the motor produces 200n of torque, do you think the Torsen magically "loses" the torque greater than the bias ratio?

@4x4.tests.on.rollers

Жыл бұрын

Nothing is wrong. Engine cannot create more than the grip allows.

@totaldla

Жыл бұрын

@@4x4.tests.on.rollers sorry, but you don't understand how the Torsen/Truetrac works. Your video is partially correct, but also very wrong.

@4x4.tests.on.rollers

Жыл бұрын

@@totaldla I understand it very well and I think you don't. But if you think I am wrong - explain it. FYI - video is entirely based on information provided by JTEKT and technical specifications of torsen from the 80's.

subaru awd with manual transmission better

Hello ! I want to put the diffential autolock Torsten on my duster because I put my car to the soft sand with my boat . It’s ok for me or no