– 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 Owner's Manual: Motor Driven Power Steering
(MDPS)
The system assists you with steering the
vehicle. If the vehicle is turned off or
if the power steering system becomes
inoperative, you may still steer the
vehicle, but it requires increased steering
effort.
If you notice any change in the effort
required to steer during normal vehicle ...
Hyundai Tucson (NX4) 2022-2025 Service Manual: Power Seat Motor
- Inspection
ower Seat Motor
1.Remove the front seat assembly.(Refer to Body - "Front Seat
Assembly")A: Slide motorB: Rear height motorC: Front height motorD:
Lumbar support motor E: Reclining motor
2.When the battery power is supplied to the motor connector, check the motor f ...