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Timing Chain: The timing chain has two types. Roller Chain and Silent Chain. The Timing Chain controls when the intake and exhaust valves open in relation to the position of the crankshaft by turning the camshaft at a precise rate. When the valves are opened and closed is determined by the position of the camshaft in relation to the position of the crankshaft. The timing chain maintains this synchronization between the crank and camshaft as it transmits the rotation of the crankshaft to the camshaft.

Timing Belt: Some engines use belts instead of chains to control the operation of the camshaft. Instead of a metal chain, a rubber belt reinforced with fiberglass or other materials is mounted on ribbed gears at the ends of the crank and camshafts. Timing belts operate in the same manner as timing chains and perform the same functions.

Sprockets:In timing chain drive systems, sprockets mesh with chains to transmit rotations accurately to camshafts.

Tensioners：Tensioners make a significant contribution to noise reduction by counteracting chain vibration and elongation in all operational conditions.

Levers and Guides：Levers and guides perform a vital role in mitigating chain vibration and ensuring accurate valve timing.