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Home >> Genesis >> 2021 >> G90 5.0 Ultimate, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 7 (Cylinder Head Assembly - 3.3L) >> CVVT Assembly >> Description And Operation >> Operation Principle >> CVVT System Mode

CVVT System Mode

WARNING: This page is about a different variant/trim than selected.
G14207371Courtesy of HYUNDAI MOTOR AMERICA
G14207372Courtesy 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 * Increase of expansion work
* Reduction of pumping loss
* Reduction of HC
Retard * Reduction of pumping loss
(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