The working principle of camshaft gear is to transfer the power of the crankshaft timing gear to the camshaft through the timing tooth belt, to ensure the precise synchronization of the crankshaft and camshaft, so as to drive the valve to open and close in time. This precise linkage mechanism ensures the smooth stroke of the piston in the engine, the timely opening and closing of the valve and the precise ignition sequence, ensuring that the engine is in the best coordinated operation at every moment
The materials of automobile camshaft gear mainly include cast iron, cast steel and steel forgings. Cast iron is widely used because of its low price, good wear resistance and thermal stability. Cast steel is suitable for high-power engines because of its high strength; Steel forgings are suitable for high performance and high speed engines ， because of their very high wear and corrosion resistance. In addition, the camshaft is usually made of high-quality carbon steel or alloy steel, after forging processing, there are also alloy cast iron or ductile cast iron casting examples
