General

GENERAL




The Driver's Control Center Differential (DCCD) system consists of the sensors and switches such as steering angle sensor, yaw rate and lateral G sensor, or stop light switch, the planetary gear type center differential (with built-in the LSD clutch), and the DCCD control module.

The center differential of single pinion gear type planetary unit distributes the engine torque to the front wheels and rear wheels at the torque ratio of 41:59.




- The controllability of the vehicle with accelerator operation has been improved more, because the timing of the differential restriction of LSD and the acceleration of the vehicle synchronizes almost completely by combining the torque sensing type mechanical LSD mechanism with the conventional electromagnetic clutch LSD mechanism.
- With the yaw rate and lateral G sensor and the newly adopted steering angle sensor, the traveling line which the driver aims at is detected, and the differential restriction force in response to the behavior of the vehicle is adjusted. This makes it possible to reduce the understeer or oversteer tendency, and to actualize vehicle behavior that the driver intends it to be.
- In manual mode, the engagement power of electromagnetic clutch LSD can be adjusted with the DCCD control dial within the range of free to lock. However, even when the engagement power of electromagnetic clutch LSD is in the free condition, the differential restriction with mechanical LSD is done.
- When a malfunction occurs in the system, the fail-safe control may be performed that releases the electromagnetic clutch LSD so as to maintain safe conditions. At this time, the Subaru Select Monitor can be used for the system diagnosis.