The body of the camshaft is a cylindrical rod approximately the same length as the cylinder bank. There are several cams on it, which are used to drive the valves. The camshaft is supported in the camshaft bearing hole through the camshaft journal, so the number of camshaft journals is an important factor affecting the rigidity of the camshaft support. If the rigidity of the camshaft is insufficient, it will bend and deform during operation, which will affect the timing of gas distribution.
The sides of the cam are egg-shaped. The purpose of its design is to ensure sufficient intake and exhaust of the cylinder. In addition, considering the durability of the engine and the smoothness of operation, the valve should not have too much impact due to the acceleration and deceleration process during the opening and closing actions, otherwise it will cause serious valve wear, increased noise or other serious consequences. Therefore, there is a direct relationship between the cam and the engine’s power, torque output, and smoothness of operation.