– 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 |
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|
(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: Care of Seat Belts
Seat belt systems should never be
disassembled or modified.
Periodic inspection
All seat belts should be inspected
periodically for wear or damage of any
kind. Any damaged parts should be
replaced as soon as possible.
Keep belts clean and dry
Seat belts should be kept clean and
dry. If ...
Hyundai Tucson (NX4) 2022-2025 Service Manual: Accelerator Position Sensor (APS)
- Description
Accelerator Position Sensor (APS) is installed on the accelerator pedal
module and detects the rotation angle of the accelerator pedal. The APS
is one of the most important sensors in engine control system, so it
consists of the two sensors which adapt individual sensor power ...