![Kia Rio: CVVT (Continuously Variable Valve Timing) System: [CVVT System Mode] - Exhaust Emission Control System - Emission Control System - Kia Rio UB 2012-2025 Service Manual](images/pages/small/3.png)
Kia Rio: CVVT (Continuously Variable Valve Timing) System: [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 |
CVVT (Continuously Variable Valve Timing) System: 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 ...
See also:
SRS Control Module (SRSCM) Installation
1.
Remove the ignition key from the vehicle.
2.
Disconnect the battery negative cable and wait for at least three
minutes before beginning ...
Oil Pump Unit (OPU) Installation
1.
Installation is the reverse of removal.
...
Antenna Coil Installation
1.
Install the antenna coil.
2.
Connect the antenna coil connector.
3.
Install the crash pad lower panel.
...
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