Features/Functions:

1. The opening and closing timing of the valve, as well as the size of the gas flow cross-section are determined by the height and profile of the cam.The profile of the cam should be designed to ensure the valve moves smoothly. The valve can open and close quickly enough under the inertia force allowed for normal operation；

2. The camshaft is to control the movement of the valve. The intake and exhaust cams of each cylinder are arranged onto the camshaft according to the valve timing and firing sequence; The number of camshafts on the shaft is determined by the number of cylinders and their transmission type.