– the CVVT Oil Control Valve (OCV) which supplies the engine oil to the cam phaser or takes out the engine oil from the cam phaser in accordance with the ECM PWM (Pulse With Modulation) control signal,
– the CVVT Oil Temperature Sensor (OTS) which measures the engine oil temperature,
– and the Cam Phaser which changes the cam phase by using the hydraulic force of the engine oil.
The engine oil which is supplied from the CVVT oil control valve changes the cam phase in the direction (Intake Advance/Exhaust Retard) or opposite direction (Intake Retard/Exhaust Advance) of the engine rotation by rotating the rotor connected with the camshaft inside the cam phaser.
• The variable force solenoid (VFS) changes its force depending on the PWM duty to control the stroke of the OCV.
• It also controls the lock, unlock, advanced, retarded, and holding functions.
[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 | Middle | * Valve Under-lap * Improvement of combustion stability |
(2) Part Load | Retard | * Reduction of HC | Retard | * Reduction of pumping loss |
(3) Low Speed /High Load | Completely Advance | * Reduction of pumping loss | Advance | * Prevention of intake back flow (Improvement of volumetric efficiency) |
(4) High Speed/High Load | Completely Advance | * Reduction of pumping loss | Advance | * Prevention of intake back flow (Improvement of volumetric efficiency) |
Hyundai Tucson (NX4) 2022-2025 Service Manual: Rear Washer Motor
- Inspection
1.With the washer motor connected to the reservoir tank, fill the reservoir tank with water.
Before filling the reservoir tank with water, check the filter for
foreign material or contamination. if necessary, clean the filter.
2.Connect positive (+) and negative ...
Hyundai Tucson (NX4) 2022-2025 Owner's Manual: 4 Wheel Drive (AWD) warning
light. 4 Wheel Drive (AWD) LOCK
indicator light
4 Wheel Drive (AWD) warning
light
This warning light illuminates:
Whenever a malfunction with the AWD
system is detected.
If this occurs, have the vehicle inspected
by an authorized HYUNDAI dealer.
For more information, refer to the "4
Wheel Drive (AWD)" section in Chapter 6.
4 Wheel ...