What is the function of the pulley？

effect:

Drive the water pump, generator and air conditioning pump to work. The water pump is the water circulation to ensure the normal operation of the engine to achieve heat dissipation. The generator is to charge the battery to ensure the normal operation of various automobile circuits. The air conditioning pump is the compressor used in the air conditioning system.

The crankshaft pulley is the power source to drive other engine accessories. It relies on the transmission belt to drive the generator, water pump, booster pump, compressor, etc.

The crankshaft pulley was originally designed to drive the camshaft, and the belt called timing belt is used to connect them.

As the key function of the timing belt drive system, the tensioning wheel is used to adjust the tightness of the timing belt to make the drive system stable, safe and reliable.

The timing belt is an important part of the engine valve system. It is connected with the crankshaft and matched with a certain transmission ratio to ensure the accuracy of inlet and exhaust time. When the engine is running, the stroke of the piston (up and down movement), the opening and closing of the valve (time) and the ignition sequence (time) should always keep "synchronous" operation under the connection of "timing".