Hyundai Venue: Exhaust Emission Control System / CVVT (Continuously Variable Valve Timing) System. Description and operation

Continuous Variable Valve Timing (CVVT) system advances or retards the valve timing of the intake and exhaust valve in accordance with the ECM control signal which is calculated by the engine speed and load.

By controlling CVVT, the valve over-lap or under-lap occurs, which makes better fuel economy and reduces exhaust gases (NOx, HC) and improves engine performance through reduction of pumping loss, internal EGR effect, improvement of combustion stability, improvement of volumetric efficiency, and increase of expansion work.

This system consist of the CVVT Oil Control Valve (OCV) which supplies the engine oil to the cam phaser or runs 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 varies the cam phase by using the hydraulic force of the engine oil.

The engine oil getting out of the CVVT oil control valve varies 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 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 control.

[CVVT System Mode]

Catalytic Converter. Description and operation

Description The catalytic converter of the gasoline engine is a three way catalyst. It oxidizes carbon monoxide and hydrocarbons (HC), and separates oxygen from the oxides of nitrogen (NOx)...

Engine Control / Fuel System

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Hyundai Venue (QX) (2020-2025) Owners Manual: Low Aspect Ratio Tires

The aspect ratio is lower than 50 on low aspect ratio tires. Because low aspect ratio tires are optimized for handling and braking, their sidewall is a little stiffer than a standard tire. Also low aspect ratio tires tend to be wider and consequently have a greater contact patch with the road surface...

Hyundai Venue (QX) (2020-2025) Service Manual: Engine Control Module (ECM). Schematic diagrams

Engine Control Module (ECM) [M/T] ECM Terminal Function [M/T] Connector [A] Pin No Description Connected to 1 Injector (Cylinder #1) control output Injector (Cylinder #1) 2 Sensor power (+5V) Throttle Position Sensor (TPS) # 1, 2 [ETC module] 3 Sensor power (+5V) Accelerator Position Sensor (APS) 1 4 Main Relay control output Main Relay 5 - - 6 Alternator signal input [FR] Alternator 7 Engine coolant temperature sensor (ECTS) signal input Engine coolant temperature sensor (ECTS) 8 Sensor ground Manifold absolute pressure sensor (MAPS) 9 - 10 Sensor ground Heated Oxygen Sensor (HO2S) [Bank 1 / Sensor 2] 11 - 12 - 13 CVVT Oil Control (OCV) Valve [Bank 1/Intake] control output CVVT Oil Control Valve (OCV) [Bank 1 / Intake] 14 Sensor power (+5V) Manifold absolute pressure sensor (MAPS) 15 Sensor power (+5V) Accelerator Position Sensor (APS) #2 A/C Pressure Transducer (APT) 16 Sensor power (+5V) CMPS [Bank 1 / Intake] CMPS [Bank 1 / Exhaust] 17 Vehicle speed signal input ABS/ESP Control Module [With ABS / ESP] 18 Battery voltage supply after ignition switch Ignition Switch 19 Sensor ground Camshaft Position Sensor (CMPS) [Bank 1 / Exhaust] 20 Sensor ground A/C Pressure Transducer (APT) 21 Sensor ground Battery sensor 22 - 23 - 24 - 25 Injector (Cylinder #2) control output Injector (Cylinder #2) 26 Cooling Fan Relay [High] control output Cooling Fan Relay [High] 27 Start relay control output (With smart key) Start relay 28 Alternator control output [COM] Alternator 29 C-CAN [Low] Other control module, Data Link Connector (DLC), 30 - 31 Camshaft Position Sensor (CMPS) [Bank 1 / Exhaust] signal input Camshaft Position Sensor (CMPS) [Bank 1 / Exhaust] 32 Sensor ground Crankshaft Position Sensor (CKPS) 33 Crankshaft Position Sensor (CKPS) signal input Crankshaft Position Sensor (CKPS) 34 Sensor ground Throttle Position Sensor (TPS) 1, 2 35 Sensor ground Accelerator Position Sensor (APS) 2 36 Sensor ground Accelerator Position Sensor (APS) 1 37 Injector (Cylinder #4) control output Injector (Cylinder #4) 38 - 39 Engine RPM signal output Smart key Control Module 40 Immobilizer communication line Immobilizer Control module [Without Smart Key] Smart Key Control module [With Smart Key] 41 C-CAN [High] Other control module, Data Link Connector (DLC) 42 - 43 Purge Control Solenoid Valve control output Purge Control Solenoid Valve (PCSV) 44 - 45 Injector (Cylinder #3) control output Injector (Cylinder #3) 46 Cooling Fan Relay [Low] control output Cooling Fan Relay [Low] 47 Camshaft Position Sensor (CMPS) [Bank 1 / Intake] signal input haft Position Sensor (CMPS) [Bank 1 / Intake] 48 Battery power (B+) Battery 49 Heated Oxygen Sensor [Bank 1 / Sensor 1] Heater control output Heated Oxygen Sensor [Bank 1 / Sensor 1] 50 Power Ground Chassis Ground 51 - 52 Power Ground Chassis Ground 53 Heated Oxygen Sensor [Bank 1 / Sensor 2] Heater control output Heated Oxygen Sensor [Bank 1 / Sensor 2] 54 CVVT Oil Control (OCV) Valve [Bank 1 / Exhaust] control output CVVT Oil Control Valve (OCV) [Bank 1 / Exhaust] 55 Battery voltage supply after main relay Main relay 56 Battery voltage supply after main relay Main relay Connector [B] Pin No Description Connected to 1 Sensor ground Engine Coolant Temperature Sensor (ECTS) 2 Throttle position sensor (TPS) #2 signal input Throttle position sensor (TPS) #2 [ETC Module] 3 Manifold absolute pressure sensor (MAPS) signal input Manifold absolute pressure sensor (MAPS) 4 A/C Pressure Transducer (APT) signal input A/C Pressure Transducer (APT) 5 - 6 - 7 Accelerator Position Sensor (APS) #1 signal input Accelerator Position Sensor (APS) #1 8 - 9 - 10 - 11 Electric Load signal input (Defrost) A/C Control Module, Outside Mirror 12 Brake switch 1 signal input Brake lamp swtich , Brake switch 13 Heated Oxygen Sensor [Bank 1 / Sensor 2] signal input Heated Oxygen Sensor [Bank 1 / Sensor 2] 14 Battery Sensor Temperature signal input Battery sensor 15 Intake air temperature sensor (IATS) signal input Intake Air temperature sensor (IATS) 16 Battery Sensor Current Direct signal input Battery sensor 17 - 18 Accelerator Position Sensor (APS) #2 signal input Accelerator Position Sensor (APS) #2 19 - 20 - 21 - 22 Throttle position sensor (TPS) #1 signal input Throttle position sensor (TPS) #1 23 Brake Lamp Switch signal input Brake Switch 24 Start switch signal input Ignition switch 25 Sensor ground Heated Oxygen Sensor [Bank 1 / Sensor 1] 26 - 27 Sensor ground Knock sensor (KS) 28 - 29 Wheel speed sensor [B] signal input Front wheel speed sensor (RH) [Without ABS] 30 Wheel speed sensor [A] signal input Front wheel speed sensor (RH) [Without ABS] 31 - 32 Sensor ground Camshaft Position Sensor (CMPS) [Bank 1 / Intake] Camshaft Position Sensor (CMPS) [Bank 1 / Exhaust] 33 Power Ground Chassis Ground 34 Clutch Switch signal input Clutch switch [M...