VARIABLE VALVE TIMING MECHANISM CONSTRUCTION [Z6]
B3E011012111T07
• The variable valve timing mechanism consists of a variable valve timing actuator, OCV, CKP sensor, CMP sensor, and the PCM.
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1
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Electric signal
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2
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Hydraulic pressure
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3
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CMP sensor
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4
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Variable valve timing actuator
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5
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CKP sensor
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Hydraulic Pressure Flow Diagram
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1
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Engine front cover
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2
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Camshaft cap
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3
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Cylinder head cover
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4
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Variable valve timing actuator
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5
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Intake camshaft
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6
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Cylinder head
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7
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Drain
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8
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Oil passage in engine front cover
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9
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Cylinder block
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10
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Oil filter
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11
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Oil pump
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12
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Oil pan
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13
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Oil
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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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