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Home >> Kia >> 2009 >> Optima LX, 2.7 4 >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 8 (Engine Control System - 2.4L) >> CVVT Oil Control Valve (OCV) >> Description And Operation >> Function And Operation Principle
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Function And Operation Principle

WARNING: This page is about a different variant/trim than selected.

The Continuously Variable Valve Timing (CVVT) system controls the amount of valve over-lap or under-lap by varying the amount of oil flow into an assembly mounted on the intake/exhaust camshaft. The PCM controls the oil control valve. As oil is directed into the chambers of the CVVT assembly, the cam phase is changed to suit various performance and emissions requirements.

  1. When camshaft rotates engine rotation-wise: Intake-Advance/Exhaust-Retard
  2. When camshaft rotates counter engine rotation-wise: Intake - Retard/Exhaust - Advance
Fig 1: Identifying CVVT Oil Control Valve Location
G06361952Courtesy of KIA MOTORS AMERICA, INC.
Fig 2: Identifying CVVT Oil Control Valve Location
G06361953Courtesy of KIA MOTORS AMERICA, INC.
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