![Kia Optima: [CVVT System Mode] - CVVT (Continuously Variable Valve Timing) System. Description
and Operation - Exhaust Emission Control
System - Emission Control System - Kia Optima TF 2011-2024 Service Manual](images/pages/small/3.png)
Kia Optima: [CVVT System Mode]
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(1) Low Speed / Low Load |
(2) Part Load |
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(3) Low Speed / High Load |
(4) High Speed / High Load |
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Driving Condition |
Exhaust Valve |
Intake Valve |
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Valve Timing |
Effect |
Valve Timing |
Effect |
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(1) Low Speed /Low Load |
Completely Advance |
* Valve Under-lap * Improvement of combustion stability |
Completely Retard |
* Valve Under-lap * Improvement of combustion stability |
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(2) Part Load |
Retard |
* Increase of expansion work * Reduction of pumping loss * Reduction of HC |
Retard |
* Reduction of pumping loss |
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(3) Low Speed /High Load |
Retard |
* Increase of expansion work |
Advance |
* Prevention of intake back flow (Improvement of volumetric
efficiency) |
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(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 contro ...
Engine Control/Fuel System
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See also:
Inhibitor Switch. Description and Operation
Description
Inhibitor Switch monitors the lever's position(PRND) and is used to control gear
setting signals.
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Chart 5
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Trip Interruption
Trip interruption expense benefits are provided in the event that a warranty-related
disablement occurs more than 150 miles from your home, and the repairs require more
than 24 hours to complete. ...
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