Kia Rio: CVVT (Continuously Variable Valve Timing) System: [CVVT System Mode] - Exhaust Emission Control System - Emission Control System - Kia Rio UB 2012-2019 Service ManualKia 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 ...

Engine Control / Fuel System
...

See also:

Removal
Engine removal is not required for this procedure.    • Use fender covers to avoid damaging pa ...

Vehicle load limit
Tire and loading information label The label located on the driver's door sill gives the original tire size, cold tire pressures recommended for your vehicle, the number of people that can be ...

SRS Control Module (SRSCM) Description
The primary purpose of the Supplemental Restraints System Control Module (SRSCM) is to discriminate between an event that warrants restraint system deployment and an event that does not. The ...

Copyright © www.kirmanual.com 2014-2019