How a Torque Converter Works
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- เผยแพร่เมื่อ 23 ก.ค. 2024
- Here's how a the torque converter works in vehicles with an automatic transmission.
The torque converter is responsible for transferring torque from the engine to the transmission. It has three main functions:
1. Allow slippage: when the wheels are stopped, the engine can remain running.
2. Torque multiplication: the stator provides multiplication at low engine RPM's to help the car get off the line easier.
3. Converter lockup: To lock the input and outputs to provide a 1:1 ratio with no loss or slip.
The converter consists of four main components:
1. The housing, or pump. This is responsible for throwing transmission fluid up through its vanes through centrifugal force toward the outside edge of the converter. This is the input and rotates with the engine.
2. The turbine. This picks up the fluid flung by the pump and changes its direction of flow, causing a torque. The torque causes the turbine to rotate, and is the output of the converter, which connects to the input shaft of the transmission to turn the gears.
3. The stator. This redirects fluid flow once again to allow the pump to recirculate the fluid. It also contains a one way clutch and is responsible for torque multiplication at lower RPM's.
4. The lockup clutch. This locks the input and output of the converter together for zero loss while at cruising speed.
The torque converter was removed and cut open for demonstration from a 2001 Toyota Corolla with the 4 speed automatic transmission. - ยานยนต์และพาหนะ
The inside of a torque converter is beautiful. Looks like art.
best car youtuber by far
+Odddit Haha maybe, thanks for the encouragement.
ya its really
@@speedkar99 definitely one of the best..keep the good work
I think I need to watch this a few more times to wrap my head around all the info and visualize as you explain.
Some is missing - SpeedKar did a fair job (he always does excellent jobs) here, but the way the torque converter multiplies torque at stall is not explained here for brevity I'm sure, so you will have to see several explanations to piece the exact theory/mechanism together.
Fantastic description. Very clear and concise.
Thanks
I know this is 5 years old, but I've watched several videos (mostly animations or way oversimplified explanations) and it never clicked for me, this video finally made it make sense
Really cool, i always hear about this but nobody explain that it is, i tried to watch a lot of videos about it and just made me more confuse, you're the only one that helped, thanks
Great video! I was having a hard time, but this quick video helped clear things up
Awesome video! You have a great talent in explaining things efficiently
Glad you like my video style
Best explanation I can find on TH-cam.
Thanks I'm glad it helped
There is no best video of torque converter explanation video on TH-cam.
Thanks
I understand now, thanks toothbrush man
You welcome
Thank you for that! I’ve been a Toyota tech for over 15 years and only just realized I don’t know how a torque converter does it’s magic.
Excellent explanation and demonstration.
Wonderful, even if faster than I could always grasp. (My fault, not yours.) Watching the video, I'm again reminded of man's amazing ingenuity. Also, that electric cars like the Tesla or Bolt have no need for any of this magic.
+Steve Kohn thanks
And yes its quite a complex system that I compliment those who designed it many years ago
You are the best auto technician on TH-cam
Well done, best explanation I've heard. Thanks.
Excellent explanation and video! Thanks!
You are welcome
Man I've been twistin' wrenches for over forty years and had always planned to tear one of these suckers apart to see that damn clutch; thank you.
thank you for explaining this so precise.......awesome!
Very good details and explanation! Thank you!
Excellent video! Thank you!
Great video as usual.
+Martin Evan thanks.
You sr are gifted.. great video
Thank you!
Good day Boy that is complicated especially with lock up Thanks
Great video content. Well done.
Hats off man!!!
Great video 👍
Thank you
Another excellent video!
Thanks
Pretty good, thanks
great video, thanks
Awesome thanks
looks so clean on such an old car
so is transmission fluid the same as the fluid used in the torque converter? my old corolla got transmission fluid replaced at 100K. I don't know if that goes inside the auto transmission gear box, the torque converter or both
+protoslashwyl Yes its the same fluid. But when you drain, your not draining the torque converter.
engineering marvel . exquisite
Awesome
one of the best torque converter explainations i"ve seen, but there is one error, at the 5 min mark you say the fluid that goes all around the back of the clutch locks up the torque converter, I think incorrect, that fluid in fact keeps the clutch away from the back plate! The solenoid when applied stops that fluid flow, and the pressure already developed by the blades is what puts pressure on the clutch onto the back plate. But really top notch video, better than those fancy ones done by big companies.
Thanks, you may be right
Excellent. Now I get it
直观，清晰，但是要多看几遍才能慢慢加深理解。
Very informative and practicle video.
+Kushantha Weragama thank you
You are the best!!!
I like your video
Bro you are so awesome
what is the proper face clearance between impeller and turbine ....please ?
Amazing
Cool. So if my transmission is experiencing slippage all I need to do is replace the torque converter due to the clutch plate being worn down.
that really helped
Thanks
Crazy good. You keep mentioning "fluid" or "oil" are you referring to transmission fluid in the torque converter?
+AutOdometer yes. Transmission oil or fluid. Same thing.
As simple as it can be said.
Simple is my style
Great clarifying and summarizing pro. Here's a stupid question do the lock up clutch affected by coolant water .u gusted it (my trans oil mixed with coolant) and if it doesn't could it be saved by traditional flushing.
Flush as much as possible. Any water could cause corrosion
Question: Do AT pump rotates when "N" is selected since the AT pump it's connected to the stator of the Converter and not the Housing(rotating at engine RPM)?
+Petar The pump always rotates. See my transmission video for details
Was it difficult to cut the converter apart? Great Vidya as always man. You have to love Toyota's 6 bolt converters too.
+John it did take a while and a lot of blade but I got it eventually.
The smell of bullshit and progress at the same time!
Do aisin torque converter AQ250 gearbox is reliable as used in volkswagen cars??
Are the fins / vanes in there welded anywhere or are they all just bent? It looks ilke the reinforcement in the center just has the little tabs bent down.
+John Hmm I didn't pay attention to how they were attached, I assume they have to be welded to transfer that much torque.
You know your stuff..😊😮
Which is better dsg gearbox or torque converter. Coz I was planning to buy polo gt tsi, earlier it had dsg gearbox now it has torque converter combined with a three cylinder tsi engine compared to four cylinders. I know dsg is a better and advanced gearbox but now torque converter really bothers me. Please make a video comparing both the gearboxs.
In the process of doing a transmission fluid flush I mistakenly drained out a little more than I had put in and caused the pump to run nearly dry for a few seconds (less than 5 seconds). I know this because it stopped coming out of the drain hose in a full stream but rather spitting it out. I immediately turned the car off and add more fluid. Would this have damaged the transmission in just a few seconds? Of course it was in park at the moment it was being drained/refilled.
No
How is the oil flowing through the torque converter? I see only one way at the shaft itself, but where does it come out?
Theres still some thing in that corrolla OMG😲
+pétri pat there's tons of parts from that corolla I still have sitting...
3:25 how do you know how much fluid goes in the converter
Good
Does anything in the torque converter still spin when the vehicle is turned off?
Very nice, but you should discuss torque converter shudder. Sometimes there is a bit of slip designed into lockup too. If the fluid is worn you get shudder, depending on the application.
+alb12345672 thanks, I didn't know about that. I heard some newer accord and Camrys were having that issue.
Yes, modern ATF has friction modifiers. It is similar to limited slip additive. Dr Tranny instant shudder fix can help sometimes. It used to be a big problem on Fords. I saw some guys on the Lexus GS forum have the issue. Not common, but it happens.
I’m experiencing some shudder on my 2011 RX350 and I’m thinking it’s the torque converter. I had a fluid exchange about 2k miles ago but it’s still there. Hopefully, it’ll diminish over time because I don’t really want to replace it. I have 262k miles on the vehicle so far
@@watso014 Some misfires are directly related to ignition. Modern cars have a pulse strategy and it requires clean torque from the engine. Was a very big issue on Ford Cars years back. Touch the brake pedal, that unlocks the converter.
Hey, where did you find my travel toothbrush? I've been looking for it everywhere!
Great explanation and video! How does act on deceleration? Does the slippage allowance prevent damage to the transmission/engine?
On deceleration the torque converter unlocks so it doesn't engine brake
@@speedkar99 thanks for the reply! By unlocks, you mean the clutch unlocks, right? The impeller and turbine spin freely but at different speeds?
I didn’t understand, from all that, if the trans. fluid exits the torque converter again, & is it a 1 direction process, aside from all those direction diverts, - MEANING in partiqular, if someone does a DIY trans flush does that flush out torque conv.?, hmnnn?🤔
Is it the tc locked when you accelerate in full throttle? As i understant it isn't but why ? Logic tells me that when you want full acceleration you do not want any slippage..
+Adrian Tc no the TC locks when your cruising
If it locked during acceleration it might stall the engine or burn too much rubber. This is why manual cars used to be faster than automatics because of the slippage.
speedkar99 locking during full throttle acceleration in 4th gear from 80 kmh (just an example) won t burn any rubber, and the engine will not stall (as it doesnt in a manual transmission).. so i still don t understand the logic behind this.
So then how does the term (over drive) fit into this concept
What is the sign that converter is going bad?Once in a while my car hesitates specially when I'm on a third gear change on a 5 speed Honda automatic transmission.The power is delayed and like slipping on the third gear.I had this rebuild 2 years ago for $2,000 and put 15,000 miles on it.Can I just ignore this?
Honda's have inherit problems with the transmissions. The 2nd gear would burn out or overheat.
Well done
+انا من الموصل عاشت الذهبيه و الجيش والحشد والشرطه thank you
How automatic gearbox engage to the gear?
It has an oil pump shaft and inside there's the torque converter Shaft
@@speedkar99 so it’s the oil pushes the clutch pack to change gear?
So that means there is a clutch inside the transmission,right?
this is an awesome video. also, i want that fucking toothbrush.
Thanks. Go steal a toothbrush from your brother
Looks like a jet engine inside.
Turbine
TH-cam don't put ad in hindi
One more thing that isn't there in an electric car. Hope they become practical for me soon.
+wholeNwon true, emerging technology.
I just want a doughnut.
+123kspencer a spare wheel for your car?
Glazed, powder or chocolate?
Did you sell toyota Corolla? And i play instagram
+KennyTheFoxySFM1 - FNAF and MC Corolla's body has been scrapped but the guts remain.
#torus #toroidal #thor #
This is why I could never be an engineer. I'm nowhere near being smart enough to think up how this should work and be designed. 🤣😕
Loose the toothbrush.👎
Use a hot dog.👍
Then I'd have a different type of audience
@@speedkar99 Hey...🤔, I never thought about that. Stick with the toothbrush😉👍.
what is the proper face clearance between impeller and turbine .....please ?
what is the proper face clearance between impeller and turbine...please ?
+rodelio roa that I'm not sure.
Oil viscosity in the torque converter directly administers face clearance parameters