Kia Rio: [CVVT System Mode] - CVVT & Camshaft - Cylinder Head Assembly - Engine Mechanical System - Kia Rio UB 2012-2020 Service ManualKia Rio: [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 ...

Removal
1. Remove the cyliner head cover. (Refer to Timing System) 2. Remove the timing chain cover. (Refer to Timing System) ...

See also:

Disassembly
1. Remove the rear cover (A) after removing nuts. 2. Remove the mounting bolts (A) and the brush holder assembly (B). ...

Special Service Tools
Tool (Number and name) Illustration Use 09411-1P000 Clutch disc guide Installation of the clutch disc. ...

Brake Booster Vacuum Pressure Sensor: Inspection
1. Check installation status of BBVPS and Vacuum hose or damage of vacuum hose. 2. Connect GDS to DLC (Data Link Cable). ...

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