Gasoline engine camshaft
The camshaft structure of gasoline engine requires a metal connecting rod between the cam of the bottom camshaft and the valve rocker arm. The cam lifts the connecting rod to push the rocker arm to open and close the valve. However, too high speed is easy to cause the ejector rod to break, so this design is mostly applied to engines with large displacement, low speed and high torque output. The overhead camshaft can omit the ejector pin to simplify the transmission mechanism from camshaft to valve, which is more suitable for the dynamic performance of the engine at high speed. The overhead camshaft is widely used.
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Camshaft

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The camshaft structure of gasoline engine requires a metal connecting rod between the cam of the bottom camshaft and the valve rocker arm. The cam lifts the connecting rod to push the rocker arm to open and close the valve. However, too high speed is easy to cause the ejector rod to break, so this design is mostly applied to engines with large displacement, low speed and high torque output. The overhead camshaft can omit the ejector pin to simplify the transmission mechanism from camshaft to valve, which is more suitable for the dynamic performance of the engine at high speed. The overhead camshaft is widely used.
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