Fig. 2.29. Diagram of the valve timing mechanism: 1 – torque; 2 – engine speed; 3 – low and medium speed engine; 4 – high speed engine; 5 – engine with variable valve timing mechanism
The variable valve timing mechanism ensures the optimum valve opening and closing moment according to engine operating conditions by continuously changing the phases of the intake valve camshaft and crankshaft (Fig. 2.29).
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