TORQUE CONVERTERS | How they Work

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  • Published: 04 July 2018
  • Torque converters use a simple idea to solve a complicated problem. This Science Garage goes over how a torque converter keeps your car from stalling, and how it can actually increase the torque coming from your engine.

    We also look at the unique system in the Koenigsegg Regera- that uses a transmissionless direct drive torque converter variation to get over 250 MPH!

    Bart teaches us how cars work by blowing stuff up and cutting things in half. It’s a science show for the car lover who’s easily bored. Join Bart as he explains the science behind everything automotive. This is cars down to the atom. This is Science Garage.

    Some of our best videos ever are coming out soon, stay tuned so you won't miss a thing!
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Comments • 1 540

  • BOBimus Rex
    BOBimus Rex  8 hours back

    There is no such thing as centrifugal force. There is only centripetal force pushing things outward, not around.

    • Dustin Wolf
      Dustin Wolf  3 days back

      We need more science garage. I’d love to do one of these. So get at me donut media lol I got plenty experience in the automotive field, enjoy explaining how everything in a car works and gots that donut media / car culture humor the ppl want lol

      • MechaHeretic
        MechaHeretic  4 days back

        Bring Back Science Garage! We need more "Two-Fan" Bart on the screen.

        • Riptide Gamer
          Riptide Gamer  4 days back

          I still can't wrap my mind around how 1500Hp could be transferred through oil...

          • MCR68136
            MCR68136  5 days back

            yet another reason i rather have a Koenigsegg over Bugatti

            • The Sethioz Project
              The Sethioz Project  5 days back

              It's well explained, but is this childish act really necessary? I don't find it funny at all (if that's what you trying to do). But good effort, I was trying to find some good examples on how this system works and this video explained it quite well. Before I wasn't exactly sure how it works. I guess good side of this system is that "clutch" never wears out as it's impossible to wear out the liquid .. or well I guess liquid can finally become contaminated and needs replacing, but it must be a lot easier to change liquid than entire clutch, like on regular car.

              I still don't understand the idea behind this tho, to me it seems like hydraulic clutch really. I mean i don't understand how is this better than normal gearbox. Engine has less power at lower revs, which is why cars have gearbox. so if you driving one of those cars at low speed (in city), then it only relies on the electric motors? doesn't the battery drain really fast, because it can't use combustion engine to charge it? Also isn't the idea of gearbox to keep engine at optimal revs, like 1500 - 3000rpm for city cars, this is because if you'd drive your car at high RPM, then engine's life would decrease a lot, but if you drive it at low rpm, then it has nearly no power and might even stall (so yeah once again i get this is why it uses electric motors), but does it really mean Regera can't drive long at low speeds cuz battery would run out?

              I must be missing something, I just don't see how Regera's torque converter can possibly be better than transmission. imagine a hybrid car with normal transmission, it should get even faster boost and higher top speeds, no?
              If you change the gear ratio, then you can get a lot higher top speeds (if engine is powerful enough and car is aerodynamic enough), it's like on a bicycle, the stronger your feet and faster you can move them, the faster your bike will go when you put it on highest gear, but torque converter seems something that is constantly stuck in mid-gear, so it needs boost of electric motors to get it started fast and at high speeds engine is at high revs, but just not enough "gears" to push it even further.
              but i guess you don't really need over 250mp/h anyways.

              • phxntkms
                phxntkms  6 days back

                I love Donut Media sm

                • arsasoor xantothecnique

                  How a regera goes in reverse gear?

                  • Fagy Sand321
                    Fagy Sand321  1 weeks back

                    How about reverse though

                    • Redtooth 75
                      Redtooth 75  5 days back

                      The reverse gear is located after the torque converter within the transmission. The torque converter will work the same regardless of the gear

                  • Mkiv_Bangbros
                    Mkiv_Bangbros  1 weeks back

                    Why does the video cut between the fan demonstration?

                    • Ryon Atkinson
                      Ryon Atkinson  2 weeks back

                      First clips are ageras

                      • Sam Sebastian
                        Sam Sebastian  2 weeks back

                        Take a shot whenever he says torque converter.

                        • Nicholas Hughes
                          Nicholas Hughes  2 weeks back

                          Really well explained, great stuff!

                          • Cole McCray
                            Cole McCray  3 weeks back

                            Love that audience gasp when Bart stops the fan 😂

                            • Faustin Gashakamba
                              Faustin Gashakamba  3 weeks back

                              That explanation was fun-tastic!

                              • thar34
                                thar34  3 weeks back

                                I love this guy and his vids😁 explains things really well, when you didn’t know fuk about shit before this vid? well you do now after this vid. And what ever level of learning and understanding you have, you’ll definitely get it watching this guys vids.

                                • William Peng
                                  William Peng  3 weeks back

                                  So why do most auto cars with torque converter still have gears?

                                  • NeedForSpeed2004
                                    NeedForSpeed2004  4 weeks back

                                    How does a top fuel dragster drive a 1/4mi in 3secs without a transmission?



                                    Clutch

                                    • 77772013
                                      77772013  4 weeks back

                                      Hey just thought you guys should know your videos are slowing creating a knowledgeable car guy thanks seriously

                                      • Charles Renzi Murphy
                                        Charles Renzi Murphy  4 weeks back

                                        Nursery children's Eeeewwwwww in the background!! 😑

                                        • Liam Harms
                                          Liam Harms  4 weeks back

                                          5:37 lowkey sounds like Steve-O laughing lmao

                                          • Yadvendra Meena
                                            Yadvendra Meena  1 months back

                                            You're trying too hard to reach 10min mark

                                            • Gabriel Palmar
                                              Gabriel Palmar  1 months back

                                              I love you

                                              • Sam Antoniak
                                                Sam Antoniak  1 months back

                                                I miss Bart.

                                                • Augusta Verbian
                                                  Augusta Verbian  1 months back

                                                  I missed this show Bart

                                                  • • Hustard Garage •
                                                    • Hustard Garage •  1 months back

                                                    What was that converter thing called again? 😂

                                                    • Douglas Myers
                                                      Douglas Myers  2 months back

                                                      does stall speed impact anything other than the RPMs at which the transmission engages? that is, does it affect either the torque multiplier or the torque lockout?

                                                      • Mad_Man322
                                                        Mad_Man322  2 months back

                                                        Image knowing you got beat by a car in first gear

                                                        • Wigo TV Allan Rey Bernardo

                                                          I learned a very important lesson in this video: Bart can afford two e-fans:) Great explanation guys!

                                                          • Luke Tony Denham
                                                            Luke Tony Denham  2 months back

                                                            You lost me at "How,"

                                                            • Topaz Lynx
                                                              Topaz Lynx  2 months back

                                                              Sadly I will never sub to you guys because you spelled your own name wrong.

                                                              You spelled it Donut instead of Doughnut.
                                                              Oh well, at least you guys are teaching me more about Torque Converters and Engines.
                                                              And, Cars... :'(

                                                              • It's Nemzy
                                                                It's Nemzy  2 months back

                                                                About to put a turbo into my Altima

                                                                • GunsWithGage
                                                                  GunsWithGage  2 months back

                                                                  Wow, your production level is seriously incredible. Great job you guys. Darn kids have it so easy these days! I had to read all that from a paper ASE manual...

                                                                  • Ashish
                                                                    Ashish  2 months back

                                                                    this is the amount of times he said torque converter
                                                                    |
                                                                    v

                                                                    • boim senju
                                                                      boim senju  2 months back

                                                                      How about DSG transmision???
                                                                      I like this show more than up to speed nolan.

                                                                      • freddy mabule
                                                                        freddy mabule  3 months back

                                                                        Torque converter !

                                                                        • Aaron Leidal
                                                                          Aaron Leidal  3 months back

                                                                          Stop talking about a stator moving. It's a stator it's literally in the name it's stationary.

                                                                          • gaedikus
                                                                            gaedikus  3 months back

                                                                            BART WE MISS YOU <3 :'C

                                                                            • Noob Gamer
                                                                              Noob Gamer  3 months back

                                                                              “And these springs help dampen that shit” 8:00

                                                                              • Alex Lara
                                                                                Alex Lara  3 months back

                                                                                Theoretically I could make a torque converter to into a direct drive transmission? I'm just asking because I'm looking at building an old school front engine dragster. Just as fun cheap project.

                                                                                • Henrique
                                                                                  Henrique  3 months back

                                                                                  5:24 So that's why stupid automatic cars move by themselves!

                                                                                  • io yo
                                                                                    io yo  3 months back

                                                                                    #rewatch

                                                                                    • piet skiet
                                                                                      piet skiet  3 months back

                                                                                      im more interested how u got to highschool

                                                                                      • Max Ferguson
                                                                                        Max Ferguson  3 months back

                                                                                        I wanna see a mid engine FWD car. Does it exist?

                                                                                        • Vipul Jani
                                                                                          Vipul Jani  3 months back

                                                                                          6:39 You said the Turbine moves faster...and for constant power ω*τ (speed*Torque) is constant..so torque should decrease if the speed goes up...not increase..right???

                                                                                          • Nathaniel Barraza
                                                                                            Nathaniel Barraza  3 months back

                                                                                            viscose force aka cumshot

                                                                                            • Your Mum
                                                                                              Your Mum  3 months back

                                                                                              I can’t help but feel like he’s trying to sell me something

                                                                                              • Aamir 1
                                                                                                Aamir 1  3 months back

                                                                                                What was that scene at the beginning