Cc, clear the gas. Why does the engine speed increase when shifting gears and stepping on the clutch?

First, because there will be impurities in the intake process, these impurities will accumulate at the throttle for a long time, and the carbon deposition will be more and more after a long time. When the throttle valve reciprocates, it will be resisted. If this situation persists for a long time, the engine computer will adjust the position of the accelerator pedal. That is to say, the position of carbon deposition is regarded as the ontology, that is to say, the throttle valve is not at all but near the position of carbon deposition. Second, the solution is as follows: after the vehicle cleans the intake valve, the flap still moves in the original formation, which means that it is not in place, but the difference is that the carbon deposit has been cleaned. So the air intake will be a little more than usual. This will lead to high idle speed. Thirdly, the idle speed can be adjusted by adjusting the throttle opening and idling oil supply. Generally speaking, the minimum idle speed is the best when the engine does not shake in the idle speed range and the acceleration performance is good.