System Description
SYSTEM DIAGRAM
| Component parts | Function |
|---|---|
| Crankshaft position sensor | Crankshaft Position Sensor . |
| Engine coolant temperature sensor 1 | Engine Coolant Temperature Sensor . |
| Engine oil temperature sensor | Engine Oil Temperature Sensor . |
| Accelerator pedal position sensor | Accelerator Pedal Position Sensor . |
| Knock sensor | Knock Sensor . |
| Combination meter | ECM receives the vehicle speed signal via CAN communication. |
| TCM | ECM receives the G sensor signal via CAN communication. |
| ECM | ECM . |
| VCR control module | Variable Compression Ratio Control Module . |
| VCR actuator | Variable Compression Ratio Actuator . |
*: Electric intake valve timing control motor is built in to the cam sprocket (INT).
SYSTEM DESCRIPTION
VCR system improves the fuel economy, engine output, and exhaust performance. by variably changing the compression ratio of the engine. VCR control module continuously controls the compression ratio of the engine by operating VCR actuator to change the angle of VCR control shaft. VCR control module controls VCR actuator according to a signal from ECM to change the compression ratio of the engine. VCR control module has a diagnostic function and transmits a DTC detection signal to ECM via CAN communication when detecting a system error.