Kia Sorento: [CVVT System Mode] - Exhaust Emission Control System - Emission Control System - Kia Sorento XM 2011-2019 Service ManualKia Sorento: [CVVT System Mode]

Second Generation XM (2011-2019) / Kia Sorento XM 2011-2019 Service Manual / Emission Control System / Exhaust Emission Control System / [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
CVVT (Continuously Variable Valve Timing) System 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:

Idler Removal and Installation
1. Remove the drive belt. (Refer to Timing System - "Drive Belt") 2. Remove the idler(A). Tightenin ...

Transmitter Inspection
1. Check that the red light flickers when the door lock or unlock button is pressed on the transmitter. 2. Remove the battery (A) and check ...

Owner maintenance
The following lists are vehicle checks and inspections that should be performed by the owner or an authorized Kia dealer at the frequencies indicated to help ensure safe, dependable operation of you ...

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