Kia Optima Manuals

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

Second generation YD (2014-2018) / Kia Forte TD 2014-2018 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
   • Use fender covers to avoid damaging painted surfaces. • ...

See also:

Intake Actuator Replacement
1. Disconnect the negative (-) battery terminal. 2. Remove the glove box housing. (Refer to Body -"Glove Box Housing") ...

Basic method of USE :
Audio CD / MP3 CD / USB / iPod® / My Music Press the key to change the mod mode in order of CD ➟ USB(iPod®) ➟ AUX ➟ My Music ➟ BT Audio. The folder/file name is displa ...

Opening the fuel filler lid
The fuel filler lid must be opened from inside the vehicle by pulling up the fuel filler lid opener. If the fuel filler lid does not open because ice has formed around it, tap lightly or push o ...

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