Tykkelse Egnet bilmodificeret udstødningsrør--begrebet ventiloverlap

It is very important to introduce a concept of "valve overlap" here! It must be designed to ensure sufficient air intake, otherwise the engine air intake will be insufficient, the combustion efficiency will be low, and the torque will be low. This valve overlap means that at the last step of a cycle, when the process of exhausting exhaust gas has not been completed, that is to say, when the piston has not moved up to the top dead center (that is, the uppermost end) in the exhaust process, the intake air The door has opened. This is the first time for the intake valve to open early, and the first time for the cylinder to start inhaling after reaching the top dead center instantaneously, to ensure that the intake valve is already open and in a standby state. The intake valve opens early, and the exhaust valve is in the open state, which is called valve overlap.

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