From what I understand, differential gears were not created by any one person. It was independently created multiple times in multiple regions across Eurasia at multiple points in history (eg. the ancient Greeks, ancient Chinese kingdoms, etc independently developed it as early as 2000 years ago). So it was already an old and well known concept by the premodern era.
@@Intranetusa I guess I'm not well versed in history that far back, but, as I understand it, it was also used as a multiplier gear in mechanical adding machines before it was in cars.
This is the best animation I've ever seen that demonstrates how a differential works. It allows the viewer to visually sense how the torque is transmitted at the two different speeds.
It's how challenging the engineering of just moving a car is, we see these things all our lives but don't come across how these things work. Truly amazing.
For Christmas 1962 I got a large scale model car. Although I had to assemble the differential I didn't completely understand the mechanics. After all these years it is nice to have such a clear explanation and animated illustration of its operation.
It’s one of these things that is so simple once you understand it if u know what I mean. I was looking at the diff in my Ford anglia think8ng how in the hell does this allow the thing to go round corners aha
@@cameronrichardson3108 I was able to keep up until he started explaining how the spider gear works. I still can't understand how one axle can turn slower than the other when both are meshed to one piece.
@@RichardFStripeRendezvous so when its going straight, both wheels want to slow down so they both exert a force backwards on the spider wheel but they cancel out. Image just the left wheel trying to slow down, it would push back on the spider wheel and rotate it counter clockwise. If the two wheels are doing this theyll try to rotate it opposite ways and it cancels out. (This is about why they dont rotate when going straight) Now for turning, the spider wheel is pushing both wheels forwards still because of the larger gear it is mounted on, but the wheel on the right needs to spin less and if it didnt it would have to slip and drag along the ground. This is friction. Instead of this friction happening to the rubber of the wheel it carries through the axle to the spider gear. Remember what we learned about both wheels equally pushing back on it? Well now this added friction causes the spider wheel to rotate. If you look at just the sides of it where it connects to the wheel axles, on the right side the larger ring gear rotation will be rotating the right wheel, but the spider wheel’s side that we are looking at is moving the opposite way. For the left side its the same, but since the friction is rotating the spider wheel on the right this rotation is added to the left axle. You really just have to think about the gears colliding and pushing.
Wow… Fantastic! My husband is an airplane mechanic and loves watching these kind of videos. When I was a child, my dad was in charge of tractor drivers when part of the Federal route of Brazil Rio/Bahia was building, around 1950’s, and he had a room just for his tools and equipment that he had to work with, so I always enjoyed being around heavy machinery, tractors and its equipments and tools.. loved this video.. thanks a lot, it brought me back good memories of my dad, which I miss a lot!
There are endless possibilities when it comes to physics and engineering... the design of the differential is very clever! Hats off to whoever came up with the design! I know that one wasn't a simple idea thrown together overnight
I never even would have thought about the back wheels needing to go through turns, let alone figuring out a solution like this. Holy crap people are smart.
There's a rear end called a "Detroit Locker" that locks the gears so they turn at the same speed. I don't know it's origins but's used for drag racing so power goes to both wheels evenly at all times. If the racing car turns a corner the inside wheel typically chirps as it rounds the corner because the weight is on the outer wheel and the inner wheel has to spin freely by doing short little wheel hops.
See, this is the kind of clear and well-explained and depicted animation that is needed for these kinds of things. I've heard of WHAT differentials are, and what they're meant to do, but could never visualize them and see them in action to really understand how the motion is working. This was great.
Differential? More like "Intriguing and substantial!" This video is truly one of the most educationally valuable and compact things on TH-cam. Maybe it's just because I'm a nerd (but in the comments on this video, aren't we all?), but that thumbnail was as good to me as any other clickbait.
Hello everyone, this video is a re-release of our old differential video with better visuals. Please watch our old video here - th-cam.com/video/SOgoejxzF8c/w-d-xo.html
@@shlokjadhav8253 Varying speeds in the axles. If the ring gear is static, you can rotate a wheel and the other wheel will rotate in the opposite direction.
I think most inventor and or engineers simply wanted more efficient ways so they come up with rough ideas until we finally get what we have now. They're goal is to solve problems first. Then they can improve on that I suspect.
I am 78 years old and am cleaning up voids in my knowledge that have always bothered me. Three of which are how a differential works, how an automatic transmission works and algebra. Thank you very much for your excellent presentation.
I know this has been around for a long time but whoever thought of this is probably not around anymore but they were nothing less than a total genius and if it was more than one person they all were.
I'm 40 years old and know my auto-mechanics... This video revealed to me that I knew what Differential is for but not how it works. I love the feeling of being smarter now than I was five minutes ago :)
This is such a good explanation. As someone who wasn't privileged to learn this stuff growing up, I really appreciate when someone makes something so easy to follow along.
This is such an amazing invention. I remember discovering this when I was playing with LEGO Technic sets as a kid and being impressed with the functionality.
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It's brilliantly simple. It just finally clicked in my head. If one side turns lets say a quarter turn more then it's going to cause the gears to spin which has the opposite effect on the other side so it would turn a quarter turn less relative to the other side Now it also makes perfect sense why if you have a car lifted in the air and spin the tire by hand it causes the other tire to spin in the other way, it's just simply because it has to have the opposite effect on the other side and because the other wheel is stopped the only way it can "slow down" is to turn backwards because the equation goes negative
It became clear to me how it worked at 0:55. Great animation makes it perfectly apparent how the spider gear accommodates the increased spin as a result of taking turns.
The force vectors on two sides of the spider gear decide the turning of spider gear. If the forces are same, the probability of rotation becomes 0. Sounds esoteric but thats how its embedded in our physics.
A differential is a gear train with three shafts that has the property that the rotational speed of one shaft is the average of the speeds of the others, or a fixed multiple of that average. The following description of a differential applies to a traditional rear-wheel-drive car or truck with an open or limited slip differential combined with a reduction gearset using bevel gears (these are not strictly necessary - see spur-gear differential): Thus, for example, if the car is making a turn to the right, the main ring gear may make 10 full rotations. During that time, the left wheel will make more rotations because it has farther to travel, and the right wheel will make fewer rotations as it has less distance to travel. The sun gears (which drive the axle half-shafts) will rotate at different speeds relative to the ring gear (one faster, one slower) by, say, 2 full turns each (4 full turns relative to each other), resulting in the left wheel making 12 rotations, and the right wheel making 8 rotations. The rotation of the ring gear is always the average of the rotations of the side sun gears. This is why if the driven roadwheels are lifted clear of the ground with the engine off, and the drive shaft is held (say, leaving the transmission in gear preventing the ring gear from turning inside the differential), manually rotating one driven roadwheel causes the opposite roadwheel to rotate in the opposite direction by the same amount. When the vehicle is traveling in a straight line there will be no differential movement of the planetary system of gears other than the minute movements necessary to compensate for slight differences in wheel diameter, undulations in the road which make for a longer or shorter wheel path, etc.
Great animation! Just the one correction towards the end of the video: an open differential, by design, *always* sends equal torque to the left and right sides. There are inherent manufacturing imperfections and other issues that contribute to 'torque steer' and 'torque wander', which is why in practice any road load data will not show a perfect 50:50 split. When one wheel is on ice, for example, the loading on the engine drops, so the overall torque being sent through the driveshaft drops, but is still split nearly equally across the halfshafts. Another way to understand the torque path is through classical mechanics: the pinion gear applies a force (N) on the ring gear, which gets multiplied by the length from the center/pivot (m). This gets applied to the side gears via the spider gear. When the car is moving in a straight line, the force is equally applied in the same direction to the left and right side gears. When a wheel begins to slip, the force is still equally split left to right, but the direction changes (one sees the force in the opposite direction). This video has a great representation of that around the 3:00 minute mark. However, since the same force is being applied on both sides and at the same distance to the pivot point (but in reversed directions), the torque applied to both halfshafts is the same.
You are both correct. He says all the POWER goes to the right wheel. In the situation shown, torque is the same, but rpm of the right wheel is significantly higher than that of the left wheel. So both wheels receive the same torque, but the right wheel expends way more of the horsepower (torque x rpm) in doing so
power stays the same but torque doesnt. Power is based on rpm as well and since 1 half shaft is goinng faster itll have more power at higher rpm but less torque
This popped up on my feed and am I glad I clicked it. I've heard the term before but that was about it. Fascinating stuff and the very detailed explanation with graphics was perfect. You earned a subscriber.
I would have loved such videos back when I was studying mechanical engineering. Particularly in my turbine design classes. They would have helped in my electrical engineering classes too!
I love learning about the engineering of cars, but often I get bored due to long unclear explanation, unknown terms without description, and lack of visual presentation. But this one kept my eyes wide the whole time. Well done
Wow…after so many years now I understand why I experienced rear wheel slippage with my Xterra when I parked it on a large snow mogul. Thank you. That was beautifully explained and animated.
This was a good video as always but you guys could have mentioned that, to overcome the problem at 4:15, cars computers use the brakes to brake the wheel with no traction to force the other wheel with traction to spin as well. This is known as "Traction Control"
What you describe is called brake based limited slip differential. Traction Control existed before those brake based LSD’s and only reduced engine power to create enough traction.
It's amazing that somebody's mind came up with this. I think about the genius of people like Benjamin Franklin and Thomas Edison. Brilliant Minds that come up with these kind of inventions. 🙂 It wasn't mentioned in the video, but the gears have a helical cut to provide more contact surface area for strength.
Would this work in reverse, where two separate engines power one single axis, connected to like a single propeller? Two counter spinning engines with variabel output could power a heli rotor perhaps, of even four engines on four sides working together Powering one single vertical axis... or two counter spinning heli blades....
Thats the best representation of the power train n how its divided by a differential based on your curve of travel. It does well to convey how the free spinning gears simultaneous apply power but allow each axle to spin as need.
That is so smart ! I never even considered that the wheels have to travel at different rpm’s to accommodate a turn, something so simple I overlooked that blew my mind and the solution is so brilliant 👌
Amazing animations help make this quite clear. However, the part about velocity (of spider and side gears) was a bit opaque (again the animation helped, but the terms and the arrows shown from an isometric angle were not the easiest to grasp intuitively)--maybe rotating the view to on top during that section might help?
@@dodzb7362 what does it mean by strength?? Both wheels will have equal strength. By taking turn it doesn't mean one will lose the strength and other will gain🙄🙄
When travelling in a straight line: The rolling resistance of each wheel is near equal, and the spider gear will not rotate about its own axis. There is no net force that will cause the spider gear to rotate on its axis. When negotiating a turn: The rolling resistance of the inside wheel increases. The outside wheel begins to move a higher speed. The spider gear will begin to move on its own axis as the two axle shaft gears rotate at different speeds. The spider gears are not powered to move on their own axis. They move on their own axis only when the rolling resistance of one wheel increases vs the other wheel. Think of the spider gear as: a way to apply constant power to the wheels as they slip. Instead of the false notion that: the spider gear rotating on its own axis then causes the output axles to move at different speeds. If this is still insufficient or does not answer your question, watch US Auto Industry's How a differential works. Its a 7 minute commercial from General Motors corporation that explains a differential beautifully through real examples.
Whoever created the differential is a genius. I didn't think that differentials were this simple and compact.
From what I understand, differential gears were not created by any one person. It was independently created multiple times in multiple regions across Eurasia at multiple points in history (eg. the ancient Greeks, ancient Chinese kingdoms, etc independently developed it as early as 2000 years ago). So it was already an old and well known concept by the premodern era.
Creative.
@@Intranetusa Oh wow, that's interesting
To my mind, this is more beautiful and profound than any work of art.
@@Intranetusa I guess I'm not well versed in history that far back, but, as I understand it, it was also used as a multiplier gear in mechanical adding machines before it was in cars.
The differential is probably the most neglected and under appreciated, yet absolutely essential part of a vehicle.
@Michael Dale . I suspect Alien Brownies has neither rubber tires nor tacos.
@@ThatControlUser he was being sarcastic, he was referring to a horse drawn carriage🤣🤣🤣
@@timothygeiger8271 ah my bad
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This is the best animation I've ever seen that demonstrates how a differential works.
It allows the viewer to visually sense how the torque is transmitted at the two different speeds.
try this one...th-cam.com/video/yYAw79386WI/w-d-xo.html
@@timn4481 yup That is the ultimate video on this subject!
@@timn4481 yeah the oldie is better in this case
It explains how the spider gear allows it to happen, but not why it happens.
Not even! There's a way better video that was made in the 1930s. th-cam.com/video/yYAw79386WI/w-d-xo.html
It's how challenging the engineering of just moving a car is, we see these things all our lives but don't come across how these things work. Truly amazing.
Didn't really plan on learning about differentials today, however this is just beautifully explained and animated!
TH-cam recommendations were what dragged me here 😆
And an awesomely simple design!
just wait for limited slip differentials!
Lol same here but couldn’t help but watch it
Me too 🙋🏽♂️☺️
I'm not a mechanic, but I love that I learned this. I never knew the wheels moved at different speeds during turns
yea u wont ever notice it but when you think about it you might have doubts
For Christmas 1962 I got a large scale model car. Although I had to assemble the differential I didn't completely understand the mechanics. After all these years it is nice to have such a clear explanation and animated illustration of its operation.
It’s one of these things that is so simple once you understand it if u know what I mean. I was looking at the diff in my Ford anglia think8ng how in the hell does this allow the thing to go round corners aha
@@cameronrichardson3108 I was able to keep up until he started explaining how the spider gear works. I still can't understand how one axle can turn slower than the other when both are meshed to one piece.
how old are u?
@@RichardFStripeRendezvous Maybe this one explains better: th-cam.com/video/yYAw79386WI/w-d-xo.html
@@RichardFStripeRendezvous so when its going straight, both wheels want to slow down so they both exert a force backwards on the spider wheel but they cancel out. Image just the left wheel trying to slow down, it would push back on the spider wheel and rotate it counter clockwise. If the two wheels are doing this theyll try to rotate it opposite ways and it cancels out. (This is about why they dont rotate when going straight)
Now for turning, the spider wheel is pushing both wheels forwards still because of the larger gear it is mounted on, but the wheel on the right needs to spin less and if it didnt it would have to slip and drag along the ground. This is friction. Instead of this friction happening to the rubber of the wheel it carries through the axle to the spider gear. Remember what we learned about both wheels equally pushing back on it? Well now this added friction causes the spider wheel to rotate. If you look at just the sides of it where it connects to the wheel axles, on the right side the larger ring gear rotation will be rotating the right wheel, but the spider wheel’s side that we are looking at is moving the opposite way.
For the left side its the same, but since the friction is rotating the spider wheel on the right this rotation is added to the left axle. You really just have to think about the gears colliding and pushing.
After trying to get my head around this for years I finally understand thanks to the time you took to create these super clear animations. Thank you
Wow… Fantastic!
My husband is an airplane mechanic and loves watching these kind of videos. When I was a child, my dad was in charge of tractor drivers when part of the Federal route of Brazil Rio/Bahia was building, around 1950’s, and he had a room just for his tools and equipment that he had to work with, so I always enjoyed being around heavy machinery, tractors and its equipments and tools.. loved this video.. thanks a lot, it brought me back good memories of my dad, which I miss a lot!
This was great. My dad tried to verbally explain it once but went over my head. Now it makes perfect sense.
And i have just learned in less than five minutes what people in the past have taken hours to try to explain. Excellent diagram and graphics 👍🏿
There are endless possibilities when it comes to physics and engineering... the design of the differential is very clever! Hats off to whoever came up with the design! I know that one wasn't a simple idea thrown together overnight
I never even would have thought about the back wheels needing to go through turns, let alone figuring out a solution like this. Holy crap people are smart.
There's a rear end called a "Detroit Locker" that locks the gears so they turn at the same speed. I don't know it's origins but's used for drag racing so power goes to both wheels evenly at all times. If the racing car turns a corner the inside wheel typically chirps as it rounds the corner because the weight is on the outer wheel and the inner wheel has to spin freely by doing short little wheel hops.
بتوفيق
@@scottheywood6502 а некоторые заваривают стабилизирущию деференциала
@@scottheywood6502 для дрифта 🤪
See, this is the kind of clear and well-explained and depicted animation that is needed for these kinds of things. I've heard of WHAT differentials are, and what they're meant to do, but could never visualize them and see them in action to really understand how the motion is working. This was great.
I've wondered my entire adult life how these things worked and you have now taught me - THANK YOU !!
Baffled me for 58 years, and then this video has made it so clear!!!!! Thank you!
One of the best ways to learn english and engineering 👍🏼
U guys have my respect
Not quite. The best way to learn English (capital E) is from an Englishman!
Brilliant. Simple enough that our 9 and 11 year old understood. Now using your videos for every car related query
Simply an outstanding instructional. Where was TH-cam back in 1969 when I was taking my first automotive class? Thank you for putting this together.
there was video of it in 1937.. th-cam.com/video/yYAw79386WI/w-d-xo.html
@@DMAX-tp4pc 2:06 the spider gear pushes on the two axles in opposite directions, so it doesn't spin when both rear wheels are the same speed
Differential? More like "Intriguing and substantial!" This video is truly one of the most educationally valuable and compact things on TH-cam. Maybe it's just because I'm a nerd (but in the comments on this video, aren't we all?), but that thumbnail was as good to me as any other clickbait.
Hello everyone, this video is a re-release of our old differential video with better visuals. Please watch our old video here - th-cam.com/video/SOgoejxzF8c/w-d-xo.html
How spider gear is rotated to spin, by motor or any other medium?
Hi, amazing video! may I ask with which programme you made this video?
@@shlokjadhav8253 Varying speeds in the axles. If the ring gear is static, you can rotate a wheel and the other wheel will rotate in the opposite direction.
Good job thank You.
@@sfoti6973 SIR, can you explain simply because I am beginner but enthusiast to learn? Pls sir
How did somebody envision this before it existed? I mean that is an absolutely incredible invention. Some people out there are brilliant.
Can we give the guy who invented the differential some kind of award please.
Nah maybe not for the fill plug. It's a pain in the butt to get off
He was probably awarded with a shit ton of money.
@@rogerwalker2224 You think so?
Cleanest explanation of how a punkin works I've ever seen. Thank you!
Really great video. If you uploaded such type of videos 10 yrs ago I would have been an engineer rather than Admin officer.
Lol
A demonstration of the best part of humanity.
“The spider gear plays a pivotal role here.” Outstanding!
🤣👌
I paused there to comment :)
I checked before I commented. Good pun from an educational channel!
🤣🤣😂👍
Weld it in place.
Excellent video , top quality, no annoying music either . Thank you .
"The differential is an integral part..."
That's some clever wordplay lmao. Also, how do engineers think of these things?!
I think most inventor and or engineers simply wanted more efficient ways so they come up with rough ideas until we finally get what we have now. They're goal is to solve problems first. Then they can improve on that I suspect.
There's another one in the video: "The spider gear plays a pivotal role here."
They got big brain
if a differential is part of an integral, it would came back to its original value, plus the c i gues :))
And later, "the spider gear plays a pivotal role here"
Man this video was clear and concise, I don't even know why I clicked it, but now I am subscribed!
Im a marine engineer.. But this chanel always been my favorite
Are you sure P.hub isn’t first on your list?
And I'm a computer engineer but I like this channel too.
I'm a school janitor but this channel never stops to amaze me
I am 78 years old and am cleaning up voids in my knowledge that have always bothered me. Three of which are how a differential works, how an automatic transmission works and algebra. Thank you very much for your excellent presentation.
I know this has been around for a long time but whoever thought of this is probably not around anymore but they were nothing less than a total genius and if it was more than one person they all were.
I'm 40 years old and know my auto-mechanics... This video revealed to me that I knew what Differential is for but not how it works. I love the feeling of being smarter now than I was five minutes ago :)
Can you please explain to me that how and when the spider gear "Knows" which direction the vehicle is turning?
I just love these educational videos. Knowing my car is essential to improve my driving style and to extend its lifetime. 👍👍👍👍
This is such a good explanation. As someone who wasn't privileged to learn this stuff growing up, I really appreciate when someone makes something so easy to follow along.
Our sme sir suggested this video. Life changing
Same,one of the moments of all time.
@@aryanjha8344 ifkr
Sme much kaam ka nahi hai bhai mere saath thela lagao
4:46 best part of the video
Одно из самых простых и понятных видео об устройстве редуктора.
This is such an amazing invention. I remember discovering this when I was playing with LEGO Technic sets as a kid and being impressed with the functionality.
This is the best explanaition of a differential I've seen so far.
I saw the older video of this years ago on your channel. It looks better and explained well in this new video. Next video will be good to
th-cam.com/video/9yJ1H33jzLY/w-d-xo.html
@@n4murr I saw this video too.
@@n4murr 9 zs
せめて日本語字幕つけてください。
Good to what?
This is simply the best video I've seen on explaining differentials.
This has some real How It's Made vibes, yet is somehow even higher quality!
I work as a cnc operator grinding pinions and matching them with ring gears. This came up in my recommended videos and I needed it xD
Love these videos, no nonsense straight talking factual information makes learning so much easier
th-cam.com/video/9yJ1H33jzLY/w-d-xo.html
Bahut din se ye confusion thi
But ab achche se samaj aa gaya
Thanks 👍👍👍
Enfin le vultech sur le différentiel !
i've lost hope I could understand how this works before - but now it seems very clear. thank you!!
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Absolutely beautiful video. Very informative, clear, visually entertaining, and precise. Amazing!
Best explaination ever seen, thank you and keep doing good stuff
It's brilliantly simple. It just finally clicked in my head. If one side turns lets say a quarter turn more then it's going to cause the gears to spin which has the opposite effect on the other side so it would turn a quarter turn less relative to the other side
Now it also makes perfect sense why if you have a car lifted in the air and spin the tire by hand it causes the other tire to spin in the other way, it's just simply because it has to have the opposite effect on the other side and because the other wheel is stopped the only way it can "slow down" is to turn backwards because the equation goes negative
Thanks for your animations, now I can know how few complex things work in real life. 😊 Well done bro keep it up! Hoping more videos from you.😊
This was so eye opening I’m glad that I know how important a spider gear is now!
Ingenuity is always mesmerising, no matter the subject.
Que maravillosa explicación, gracias.
Saludos desde BOGOTÁ 🇨🇴👏👏🇨🇴🇨🇴
It became clear to me how it worked at 0:55. Great animation makes it perfectly apparent how the spider gear accommodates the increased spin as a result of taking turns.
Wow! I never thought that I'd understand how an open differential works. Great video.
Parfait pour le prochain Vultech sur le différentiel 🤣
Really didn't expect this in my TH-cam feed but I'm glad I clicked on it!
It's still black magic even after having seen this video.
The force vectors on two sides of the spider gear decide the turning of spider gear. If the forces are same, the probability of rotation becomes 0. Sounds esoteric but thats how its embedded in our physics.
@@6s9hcr2 thanks
th-cam.com/video/yYAw79386WI/w-d-xo.html might help
@@Kuak_Kuak Only reason I'm watching this video about differentials is because I watched that first video you linked. Old videos explain it better
Nah, try automatic transmission and all that planetary gears stuff.
Your explainer videos are top notch. When I want to learn some engineering subject, I always look for your videos first ❤
"The differential is an integral part of all four wheelers"
Nice.
Student from Technical School, contents well put across, Bravo!!!!
A differential is a gear train with three shafts that has the property that the rotational speed of one shaft is the average of the speeds of the others, or a fixed multiple of that average.
The following description of a differential applies to a traditional rear-wheel-drive car or truck with an open or limited slip differential combined with a reduction gearset using bevel gears (these are not strictly necessary - see spur-gear differential):
Thus, for example, if the car is making a turn to the right, the main ring gear may make 10 full rotations. During that time, the left wheel will make more rotations because it has farther to travel, and the right wheel will make fewer rotations as it has less distance to travel. The sun gears (which drive the axle half-shafts) will rotate at different speeds relative to the ring gear (one faster, one slower) by, say, 2 full turns each (4 full turns relative to each other), resulting in the left wheel making 12 rotations, and the right wheel making 8 rotations.
The rotation of the ring gear is always the average of the rotations of the side sun gears. This is why if the driven roadwheels are lifted clear of the ground with the engine off, and the drive shaft is held (say, leaving the transmission in gear preventing the ring gear from turning inside the differential), manually rotating one driven roadwheel causes the opposite roadwheel to rotate in the opposite direction by the same amount.
When the vehicle is traveling in a straight line there will be no differential movement of the planetary system of gears other than the minute movements necessary to compensate for slight differences in wheel diameter, undulations in the road which make for a longer or shorter wheel path, etc.
@DO NOT BE DECEIVED: THE WICKED WONT ENTER HEAVEN. Jesus was a Prophet. Period
The best channel of explanation✌️
Great animation! Just the one correction towards the end of the video: an open differential, by design, *always* sends equal torque to the left and right sides. There are inherent manufacturing imperfections and other issues that contribute to 'torque steer' and 'torque wander', which is why in practice any road load data will not show a perfect 50:50 split.
When one wheel is on ice, for example, the loading on the engine drops, so the overall torque being sent through the driveshaft drops, but is still split nearly equally across the halfshafts.
Another way to understand the torque path is through classical mechanics: the pinion gear applies a force (N) on the ring gear, which gets multiplied by the length from the center/pivot (m). This gets applied to the side gears via the spider gear. When the car is moving in a straight line, the force is equally applied in the same direction to the left and right side gears. When a wheel begins to slip, the force is still equally split left to right, but the direction changes (one sees the force in the opposite direction). This video has a great representation of that around the 3:00 minute mark. However, since the same force is being applied on both sides and at the same distance to the pivot point (but in reversed directions), the torque applied to both halfshafts is the same.
You are both correct. He says all the POWER goes to the right wheel. In the situation shown, torque is the same, but rpm of the right wheel is significantly higher than that of the left wheel. So both wheels receive the same torque, but the right wheel expends way more of the horsepower (torque x rpm) in doing so
power stays the same but torque doesnt. Power is based on rpm as well and since 1 half shaft is goinng faster itll have more power at higher rpm but less torque
also not sure why they call it a pinion on the drive shaft, typically pinions are the driven gear(s), and the drive gear is the bull
This popped up on my feed and am I glad I clicked it. I've heard the term before but that was about it. Fascinating stuff and the very detailed explanation with graphics was perfect. You earned a subscriber.
I would have loved such videos back when I was studying mechanical engineering. Particularly in my turbine design classes. They would have helped in my electrical engineering classes too!
Reeyil
Funny how my buddies and I build cars in Forza horizon and I never knew how differentials function and now I'm seeing this. Thank you!
It's so amazing How simple things are sometimes. You'd think it'd be much more complex..
I knew what a differntial does but never how it works. That was simple easy and very teaching!
I love learning about the engineering of cars, but often I get bored due to long unclear explanation, unknown terms without description, and lack of visual presentation.
But this one kept my eyes wide the whole time. Well done
this is the video for you.. th-cam.com/video/yYAw79386WI/w-d-xo.html
I love this guys because when its animated you can see inside instead of in real life.
And he makes everything more simpler.
Wow…after so many years now I understand why I experienced rear wheel slippage with my Xterra when I parked it on a large snow mogul. Thank you. That was beautifully explained and animated.
Man talk about something we take for granted…. Excellent video
This was a good video as always but you guys could have mentioned that, to overcome the problem at 4:15, cars computers use the brakes to brake the wheel with no traction to force the other wheel with traction to spin as well. This is known as "Traction Control"
What you describe is called brake based limited slip differential. Traction Control existed before those brake based LSD’s and only reduced engine power to create enough traction.
It's amazing that somebody's mind came up with this. I think about the genius of people like Benjamin Franklin and Thomas Edison.
Brilliant Minds that come up with these kind of inventions. 🙂
It wasn't mentioned in the video, but the gears have a helical cut to provide more contact surface area for strength.
Yes and they are conical helical.
Thanks!
Would this work in reverse, where two separate engines power one single axis, connected to like a single propeller? Two counter spinning engines with variabel output could power a heli rotor perhaps, of even four engines on four sides working together Powering one single vertical axis... or two counter spinning heli blades....
Yes, it's called a planetary gear set. It is used in that way e.g. in Toyota Prius
This channel has a video about planetary gears as well th-cam.com/video/ARd-Om2VyiE/w-d-xo.html
Involuntarily stumbled upon this video and learned something fascinating. Made my day. Now onto your Limited Slip Differential video. THANKS!!!!!
Enfin le vultech les loulous !!!! wait ..
ça leur fait des belles animations pour illustrer, ils auront plus d'excuse
@@Methar39 il faut encore avoir les droits ahah
Haha je cherchais les commentaires qui allaient faire allusion à Vilebrequin ^^
Grade 10 auto class just came roaring back. Nice to re-learn this, thanks!
3:21 what control the direction and how fast the spider gear rotates?
Thats the best representation of the power train n how its divided by a differential based on your curve of travel. It does well to convey how the free spinning gears simultaneous apply power but allow each axle to spin as need.
Impressive that in its essence the spider gear is an inactive passive part that is automatically activated during different rpm in the wheels. genius!
Why is it called a spider gear?
Your explanation is outstanding bro…. Love from Indian
I just want to say "KUDOS TO THOSE SPIDER GEAR DUDES".
what a thorough explanation of a complex topic. This channel is awesome. I'm surprised it only has 5 million subscribers.
Everybody gangsta until they try to understand a planetary gear engine.
Basically a planetary gear is a differential where all the shafts are aligned in one direction
That is so smart ! I never even considered that the wheels have to travel at different rpm’s to accommodate a turn, something so simple I overlooked that blew my mind and the solution is so brilliant 👌
We need 2 french dude to do a vidéo on it , vilebrequin
this is what engineering is all about........ differential is such a simple mechanism but just using it in such a way is just unimaginable
Vilebrequin : référencement
c'etait évident de croiser des loulous sur cette vidéo
Awesome video. Love these animated videos - learning differently types of engineering masteries in a matter of minutes.
Amazing animations help make this quite clear. However, the part about velocity (of spider and side gears) was a bit opaque (again the animation helped, but the terms and the arrows shown from an isometric angle were not the easiest to grasp intuitively)--maybe rotating the view to on top during that section might help?
Crystal clear explanation✌️
How does the spider gear know when to rotate clockwise or counterclockwise?
02:17 "spider gear rotates on its own axis. In fact it's forced to rotate because of different speeds of the wheels."
@@balasubramanianp1372 so the difference in wheel speeds decide which way it rotates?
@@therandomchannel02 Yes. During right turn, left wheel moves faster, moving the spider gear clockwise (when on top)..
Sending all the power to the wheel that slips. A favorite of anyone living with snow.
But, How does the spider gear get to know that wether he has to rotate about its own axis when the vehicle is turning or not??
Strength of resistance of each wheel. If right has resistance, the spider gear will rotate and transfer more rpm to left side.
@@dodzb7362 by resistance you mean friction from the road right?
@@dodzb7362 what does it mean by strength?? Both wheels will have equal strength. By taking turn it doesn't mean one will lose the strength and other will gain🙄🙄
When travelling in a straight line:
The rolling resistance of each wheel is near equal, and the spider gear will not rotate about its own axis. There is no net force that will cause the spider gear to rotate on its axis.
When negotiating a turn:
The rolling resistance of the inside wheel increases. The outside wheel begins to move a higher speed. The spider gear will begin to move on its own axis as the two axle shaft gears rotate at different speeds.
The spider gears are not powered to move on their own axis. They move on their own axis only when the rolling resistance of one wheel increases vs the other wheel. Think of the spider gear as: a way to apply constant power to the wheels as they slip. Instead of the false notion that: the spider gear rotating on its own axis then causes the output axles to move at different speeds.
If this is still insufficient or does not answer your question, watch US Auto Industry's How a differential works. Its a 7 minute commercial from General Motors corporation that explains a differential beautifully through real examples.
@@gunshipproduct2 great explanation dude!!