Briefly describe the function of the valve train?

[SanMadelyn]

The function of the valve train: to open and close the intake and exhaust valves of each cylinder at the right time, so that fresh combustible mixture (gasoline engine) or air (diesel engine) can enter the cylinder in time, and exhaust gas can be discharged from the cylinder in time. During the compression and power strokes, the valves are closed to ensure the sealing of the combustion chamber. More information about the valve train is as follows: 1. The requirements of the valve train are that the structural parameters and form should help reduce intake and exhaust resistance, and the opening time and duration of the intake and exhaust valves should be appropriate, so that intake and exhaust are as sufficient as possible to obtain greater power torque and emission performance. 2. Various valve trains can be divided into two main parts: the valve group and the valve drive group. The valve group includes the valve and its related parts, and its composition is basically independent of the form of the valve train.