Active On-Demand Coupling
| ITEM | DESCRIPTION |
|---|---|
| 1 | Clutch assembly |
| 2 | Pressure relief/air bleed valve |
| 3 | Casing |
| 4 | Driveshaft flange |
| 5 | Electric motor and pump assembly |
| 6 | Active on-demand coupling control module |
| 7 | Pump housing |
| 8 | Electrical connectors |
The active on-demand coupling is an electronically controllable All Wheel Drive (AWD) coupling. An active on-demand coupling control module is located externally on the casing of the coupling. The control module uses control information from the Anti-lock Brake System (ABS) control module on the high speed Controller Area Network (CAN) chassis systems bus and the Engine Control Module (ECM) on the high speed CAN powertrain systems bus to operate a high pressure hydraulic pump to control a multi-plate clutch within the coupling.
The active on-demand coupling is attached to the front of the rear differential with four bolts.
The rear differential is connected via a wet multi-plate clutch within the active on-demand coupling which makes it possible to vary the torque distribution to the rear differential. The active on-demand coupling is independent of the differential speed between the front and rear differentials, full locking torque to the rear differential, if needed, is available at any given time and speed.