Hitachi Automotive Systems
 VCR actuator |  |
VCR (Variable Compression Ratio)
Slim brushless motor
Harmonic Drive reduction gear
Harmonic Drive reduction gear
 VCR control module |  CAN communication |
As use of VCR makes it possible to achieve both the fuel economy of a naturally aspirated engine and the output of a turbocharged engine, the technique is extremely useful when turbocharging is used to downsize engines for higher efficiency.
