![Kia Rio: [CVVT System Mode] - CVVT & Camshaft - Cylinder Head Assembly - Engine Mechanical System - Kia Rio UB 2012-2024 Service Manual](images/pages/small/3.png)
Kia 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:
Special Service Tools
Tool (Number and name)
Illustration
Use
Alternator pulley remover wrench
(09373-27000)
Removal and installation of alternator pulley
...
Seat Heater Switch Installation
1.
Install the seat heater switch.
2.
Install the console assembly.
3.
Connect the battery (-) terminal.
...
Front Wheel Speed Sensor Inspection
1.
Measure the output voltage between the terminal of the wheel speed
sensor and the body ground.
...
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