Hyundai Accent: Description

Continuous Variable Valve Timing (CVVT) system advances or retards the valve timing of the intake and exhaust valve in accordance with the ECM control signal which is calculated by the engine speed and load.

By controlling CVVT, the valve over-lap or under-lap occurs, which makes better fuel economy and reduces exhaust gases (NOx, HC) and improves engine performance through reduction of pumping loss, internal EGR effect, improvement of combustion stability, improvement of volumetric efficiency, and increase of expansion work.

This system consist of

The engine oil getting out of the CVVT oil control valve varies the cam phase in the direction (Intake Advance/Exhaust Retard) or opposite direction (Intake Retard/Exhaust Advance) of the engine rotation by rotating the rotor connected with the camshaft inside the cam phaser.

CVVT (Continuously Variable Valve Timing) System. Description and Operation

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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 ...

See also:

Lighting control
The light switch has a Headlight and a Parking light position. To operate the lights, turn the knob at the end of the control lever to one of the following positions: (1) OFF position (2) Parki ...

To turn cruise control off, do one of the following
Push the cruise ON/OFF button (the CRUISE indicator light in the instrument cluster will go off). Turn the ignition off. Both of these actions cancel cruise control operation. If you want ...

Push-starting
Your manual transaxle-equipped vehicle should not be push-started because it might damage the emission control system. Vehicles equipped with automatic transaxle cannot be push-started. Follow the ...