why do we leave the clutch as we step on the accelerator when we start from the first gear?

Question

well, why don't we do so when we change gears from other gears?

i am an enginering students and the more in depth u go the better ur chances of getting th best answer award!

thanks anyway for helping me out!

Answer 1

Are you asking why we "ride" the clutch leaving from a stop in first gear. If thats it, the main reason is to keep the engine in the proper powerband and to prevent overlugging the engine. This is only required from a dead stop because its the only time the engine is required to move the entire mass of the car at one time. Once moving, the clutch can be quickly released after changing gears as the car already has kintetic energy in the direction of travel. You also don't have to ride the clutch while downshifting as the cars mass is pushing the engine to a higher RPM and is being put under a different type of load.

Answer 2

the student that you are must know a mass at rest tends to stay at rest ad a mass at movement tends to stay moving until a force acts upon it,..so that said ( maybe not in the proper words but you know what the quote is ) your engine goes from linear motion to circular motion that moves the clutch plates and also when you press the peddle it disengages the transmission form the engine, then as you slowly release the pedal, you need to raise the engine RPM a little so you can get the vehicle to begin to move, ( the force acting on the non moving mass) then you release the pedal, and your in first gear, ( as you know) you need to shift gears to second, and the vehicle is in MOTION all ready, and the momentum keep the vehicle moving for the second it takes to shift to second and the other gears as well, and with the engagement of the clutch plates you need to bring the engine RPMs up to at least the RPM it was before you shifted so you keep accelerating, the only reason you increase the engines RPM is so you get the heavy mass moving..that is all, so the clutch slips a little until the vehicle is moving fast enough so you can let it engage completely..and you do not need to do this with the other gears, because like I said the momentum... the reason you press the clutch peddle in other gears is so to disengage the engine and the transmission and rear end from each other.... it is just physics...


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Answer 3

But we do this every time we change gears! Letting go engages the clutch, and stepping on the accelerator gives the necessary push to keep going.
If you have a vehicle where you don't depress the clutch when chaging gears in higher gears, it means that you have an old, unsynchronized truck transmission on your hands,. They can be worked that way, although it isn't recommended.

Answer 4

Why do you think you don't have to "leave" the clutch pedal after each gear? That's how it works.

Answer 5

i guess i don't know how to answer this other then that's because that's how it needs to be done:) lol in order for the clutch plates to engage and disengage properly with the timing to the motor you just have to:)

Answer 6

http://en.wikibooks.org/wiki/Transwiki:Manual_transmission_driving_technique

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