OIL CONTROL VALVE (OCV) [SKYACTIV-G (WITHOUT CYLINDER DEACTIVATION (US))]
OIL CONTROL VALVE (OCV) [SKYACTIV-G (WITHOUT CYLINDER DEACTIVATION (US))]
SM2565227
id0110u0001600
Purpose, Function
• The OCV switches the oil passage to the hydraulic variable valve timing actuator to control the opening/closing period of the exhaust valve.
Construction
• The OCV is installed to the exhaust camshaft cap (No.1).
• The OCV consists of a spool valve which switches the engine oil passage and a plunger, coil, and return spring which operate the spool valve.
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Operation
At retard
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• The spool valve is moved to the retard side by the signal from the PCM and engine oil is lead to the retard oil passage of the exhaust camshaft.
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At advance
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• The spool valve is moved to the advance side by the signal from the PCM and engine oil is lead to the advance oil passage of the exhaust camshaft.
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Middle point maintenance
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• The spool valve is moved to the closed position of the oil passage to the exhaust camshaft by the signal from the PCM.• The construction is designed to supply a small amount of oil to the advance and retard oil passages even while the middle point is maintained, improving holding stability while at low oil pressure.
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