Active On-Demand Coupling

When starting the vehicle, the electric motor is started, operating the hydraulic pump to swiftly to provide the system with pressurized hydraulic fluid and making the system ready for operation. The hydraulic pump sets the pressure to the clutch piston which compresses the clutch plates. The level of pressure set depends on the torque level needed and on the driving situation. In traction/high slip conditions, a high pressure is delivered providing partial or full all wheel drive. In tight curves (for example parking) or at high speeds, a much lower pressure is delivered providing partial or full front wheel drive.