VARIABLE VALVE TIMING MECHANISM CONSTRUCTION [ZY, Z6]
id0110b0120700
• The variable valve timing mechanism consists of a variable valve timing actuator, OCV, CKP sensor, CMP sensor, and the PCM.
Hydraulic Pressure Flow Diagram
Component and function
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Variable valve timing actuator
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• Continuously modifies the phases of the intake camshaft and crankshaft at the forward end of the intake camshaft using hydraulic pressure from the OCV.
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OCV
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• Operated by current (duty signal) from the PCM. Controls the hydraulic oil passages to the variable valve timing actuator.
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CKP sensor
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• Inputs engine revolution signal to the PCM.
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CMP sensor
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• Inputs cylinder identification signal to the PCM.
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PCM
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• Controls the OCV so that optimum valve timing is obtained according to engine operation conditions.
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