timing belt and timing chain

The term cam belt is often used interchangeably with timing belt. However, it specifically refers to the same component's function in controlling the camshaft's movement. The camshaft is responsible for opening and closing the engine’s intake and exhaust valves. The precise timing of these events is crucial for optimal engine performance. A well-functioning cam belt ensures the engine runs smoothly, efficiently, and with minimal emissions.


...

The mechanism for varying the pulley diameter can take many forms, including adjustable sheaves or conical pulleys. By changing the effective diameter of the pulleys, the system can alter the speed ratio between the input and output. As the diameter of the driving pulley decreases, the speed of the driven pulley increases, and vice versa. This principle allows for smooth transitions in speed and ensures that the system can operate efficiently under varying loads.


...