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The transmission method between the engine crankshaft and camshaft

Release time:

2024-05-24

The camshaft of a 4-stroke engine rotates 1 turn, while the crankshaft rotates 2 turns.

Transmission ratio

In a four-stroke engine, the camshaft rotates once while the crankshaft rotates twice.

This is determined by the working principle of the four-stroke engine.

The crankshaft makes two rotations, allowing each cylinder to perform work once, so one working cycle of the engine is two rotations.

However, within one working cycle, the valves only need to open and close once, so for the camshaft, it rotates once during one working cycle of the engine.

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The transmission method between the crankshaft and camshaft

There are three types: gear transmission, chain transmission, and toothed belt transmission.

The advantage of gear transmission is its accuracy and reliability, but it produces more noise.

The advantage of chain transmission is its low resistance and high reliability, but it also generates noise and requires lubrication.

The advantage of toothed belt transmission is that it produces less noise and does not require lubrication, but its lifespan is slightly shorter; generally requires replacement after about 30,000 kilometers.

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