The role of automobile crankshaft pulley:


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


2. The crankshaft belt pulley is the power source for driving other engine accessories, relying on the transmission belt to drive the generator, pump, booster pump, compressor, etc.;


3. The crankshaft pulley was originally used to drive the camshaft, and the timing belt was used to connect the camshaft.