Hydraulic torque wrench structure

The main body of the camshaft is a cylindrical rod with the same length as the cylinder. A number of cams are set above to drive the valve. One end of the camshaft is the bearing support point, and the other end is connected to the driving wheel.

The side of the CAM is egg-shaped. The purpose of its design is to ensure adequate intake and exhaust of the cylinder, specifically in the shortest possible time to complete the valve opening and closing action. In addition, considering the durability of the engine and 

the smoothness of operation, the valve can not produce too much impact due to the acceleration and deceleration process in the opening and closing action, otherwise it will cause serious wear of the valve, noise increase or other serious consequences.

In inline engines, each CAM corresponds to one valve, while in V-type or horizontally opposed engines, two valves share one CAM. The rotor engine and valveless valve distribution engine do not need CAM because of their special structure.