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Home >> Hyundai >> 2018 >> Kona Limited, FWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 11 (Cylinder Head Assembly - 2.0L) >> CVVT & Camshaft >> Description And Operation >> CVVT System Mode

CVVT System Mode

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G12606465Courtesy of HYUNDAI MOTOR AMERICA
G12606466Courtesy of HYUNDAI MOTOR AMERICA
Driving Condition Exhaust Valve Intake Valve
Valve
Timing
Effect Valve
Timing
Effect
(1) Low Speed
/Low Load
Completely
Advance
* Valve Under-lap
* Improvement of combustion stability
Completely
Retard
* Valve Under-lap
* Improvement of combustion stability
(2) Part Load Retard * Reduction of HC Retard * Delays the closing time of intake valve to reduce pumping loss
* Increases expansion work
(3) Low Speed
/High Load
Retard * Increase of expansion work Advance * Prevention of intake back flow (Improvement of volumetric efficiency)
(4) High Speed
/High Load
Advance * Reduction of pumping loss Retard * Improvement of volumetric efficiency