CVVT System Mode
| 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 |