Use:
Timing belt Timing belt plays a connecting role. The upper part is connected with the timing wheel of the engine cylinder head, and the lower part is connected with the crankshaft timing wheel. The timing wheel is connected with the camshaft, which has a cam, and its contact point is a small rocker arm, which generates pressure through the power brought by the timing belt and plays a top role.
The function of jacking up the intake valve is to let atomized gasoline enter the cylinder, and when jacking up the exhaust valve, it is to let exhaust gas out of the cylinder; When the concave part (note: not the convex part) of the camshaft touches the small rocker arm at the same time, the intake valve and exhaust valve are closed at this time, resulting in compression ratio, ignition of the distributor, and internal combustion and power generation!