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.