Kia Soul: [CVVT System Mode] - Cylinder Head Assembly - Engine Mechanical System - Kia Soul 2014-2018 PS Service ManualKia Soul: [CVVT System Mode]

Second generation PS (2014-2018) / Kia Soul 2014-2018 PS Service Manual / Engine Mechanical System / Cylinder Head Assembly / [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 & Camshaft 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 ...

    CVVT & Camshaft Removal
    1. Remove the cylinder head cover. (Refer to Cylinder Head Assembly - "Cylinder Head Cover") 2. Turn the crankshaft damper pu ...

    See also:

    Tire maintenance
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    Changing the engine oil and filter
    Have engine oil and filter changed by an authorized Kia dealer according to the Maintenance Schedule at the beginning of this chapter. CALIFORNIA PROPOSITION 65 WARNING Engine oil contains chemica ...

    Relay Box (Engine Compartment) Inspection
    1. Disconnect the negative (-) battery terminal. 2. Pull out the relay from the engine compartment relay box. ...