Kia Rio Manuals

Kia Rio: [CVVT System Mode] - CVVT & Camshaft - Cylinder Head Assembly - Engine Mechanical System - Kia Rio UB 2012-2026 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:

Positive Crankcase Ventilation (PCV) Valve: Inspection
1. Insert a thin stick (A) into the PCV valve (B) from the threaded side to check that the plunger movement.    ...

Inspection
Rear Brake Disc Thickness Check 1. Check the brake pads for wear and fade. 2. Check the brake disc for damage and cracks. ...

Interior Trim Components
[5 Door, 4 Door] 1 . Front pillar trim 2 . Center pillar upper trim 3 . Center pillar lower trim 4 . Rear pillar trim [5 Door] 5 . Front door scuff trim 6 . ...

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