Hyundai Accent Manuals

Hyundai Accent: [CVVT System Mode] - CVVT (Continuously 
Variable Valve Timing) System. Description and Operation - Exhaust Emission Control System - Emission Control SystemHyundai Accent: [CVVT System Mode]

(1) Low Speed / Low Load
(2) Part Load


(3) Low Speed / High Load
(4) High Speed / High Load



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
Operation Principle
The CVVT has the mechanism rotating the rotor vane with hydraulic force generated by the engine oil supplied to the advance or retard chamber in accordance with the CVVT oil control valve con ...

Engine Control/Fuel System
...

See also:

Removal and Installation
1. Disconnect the battery negative terminal. Tightening torque (-) terminal : 4.0 ~ 6.0N.m (0.4 ~ 0.6kgf.m, 3.0 ~ 4.4l ...

Component(2)
...

Adjustment
How To Initialize Motor 1. Check that the glass has been installed. A. Finished height adjustment. 2. ...

Hyundai Accent Manuals

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