proxlamus© Posted May 11, 2008 Share Posted May 11, 2008 I've noticed WRC cars and F1 cars for example have a semi-automatic transmission with the flappy paddle gear box.. but they also have a clutch pedal and clutch for launches or tight handbrake turns so they don't stall out. VIDEO example about 5 min in I realize there is obviously a clutch and pressure plate, but is there also a torque converter?! If this system used JUST a clutch.. how does the transmission shift under load and full throttle for example without "disengaging?" from one gear to the next. Im puzzled. I found this "dual-clutch" transmission link on how stuff works http://auto.howstuffworks.com/dual-clutch-transmission.htm If you have a dual clutch system... is there a primary clutch and pressure plate between the engine and the transmission, as well as the 2nd and 3rd clutches built into the transmission that are hydraulically controlled? Quote Link to comment Share on other sites More sharing options...
Challenger Posted May 11, 2008 Share Posted May 11, 2008 From what I know they are air actuated.... but thats something Ive "heard". Id be interested in how it actually works. Quote Link to comment Share on other sites More sharing options...
TrumpetRhapsody Posted May 11, 2008 Share Posted May 11, 2008 I believe the transmissions you are referring to are "sequential" gearboxes. I'm not sure how they work, but they sound like what you are trying to describe. I'm sure google or wiki could shed some light using that term. Quote Link to comment Share on other sites More sharing options...
ZDrifter Posted May 12, 2008 Share Posted May 12, 2008 Im pretty sure the WRC Cars use a sequential transmission which means move the gearshift forward and you up shift, backwards and downshift. There is still a clutch pedal, its just all in the transmission. Then there is flappy paddle transmission. Im a Ferrari tech so Ill offer my input. These transmissions do have clutches like any standard transmission yet they are electronically controlled when you hit the paddle then the information is sent to a TCU (Transmission control unit) then the TCU procedes to disengage the clutch hydraulically, switch gears and re-engage the clutch. Now for you who havent heard about the Ferrari F430 Scuderia, its shift times are almost as fast as a F1 Car. I havent been able to drive one, but have been in the presence of one and heard it drive off when the owner picked it up. First one in Oregon Quote Link to comment Share on other sites More sharing options...
proxlamus© Posted May 12, 2008 Author Share Posted May 12, 2008 Yes the transmission is called a Sequential gear box with a dog ring engagement. Im just curious how it works Quote Link to comment Share on other sites More sharing options...
ZDrifter Posted May 12, 2008 Share Posted May 12, 2008 I personally love this video. And sorry I got it wrong, push forward is downshift and backwards is up shift. Heres the video Quote Link to comment Share on other sites More sharing options...
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