Example: 4-stroke engine : 7200 RPM Crankshaft Speed 7200 RPM 2 full rotations = 1 cycle Camshaft Speed 3600 RPM 1 full rotation = 1 cycle Ratio (Crank:Cam) 2:1 Required for valve timing Power Strokes 3600 per min 1 power stroke per 2 revolutions
Example: 4-stroke engine : 7200 RPM Crankshaft Speed 7200 RPM 2 full rotations = 1 cycle Camshaft Speed 3600 RPM 1 full rotation = 1 cycle Ratio (Crank:Cam) 2:1 Required for valve timing Power Strokes 3600 per min 1 power stroke per 2 revolutions
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