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Home >> Kia >> 2023 >> Sorento Plug-In Hybrid SX Prestige >> Repair and Diagnosis >> External Pages >> Different car >> Section 88 (Exhaust Emission Control System (PHEV)) >> CVVT (Continuously Variable Valve Timing) System >> Description And Operation >> Operation Principle >> [CVVT System Mode]

[CVVT System Mode]

WARNING: This page is about a different car, the 2024 Kia Sorento. However, it is still accessible from the selected car via links, so may be relevant.
G14956861Courtesy of KIA MOTORS AMERICA, INC.
(1) Low Speed/Low Load (2) Part Load
G14956862Courtesy of KIA MOTORS AMERICA, INC.
G14956863Courtesy of KIA MOTORS AMERICA, INC.
(3) Low Speed/High Load (4) High Speed/High Load
G14956864Courtesy of KIA MOTORS AMERICA, INC.
G14956865Courtesy of KIA MOTORS AMERICA, INC.
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
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