Ford Kuga

 Service Manual

Rear Drive Axle/Differential » Rear Drive Axle and Differential (System Operation and Component Description)
Increased base pressure (preload)

To ensure very fast torque transmission, a higher voltage is applied to the electric feed pump and the control valve fully closed before the shaft-driven pump is brought into operation. As a result, the maximum pressure is raised above the base pressure, and a torque of up to 80 Nm applied to the multi-plate clutch. This achieves significantly faster pressure build-up than with older systems (second generation). To protect the pump from overloading, the pressure is restricted to approx.

10 bar by the pressure relief valve. The hydraulic fluid flows back into the sump via the pressure accumulator.

General Information

Driving situations

Haldex clutch

Design of the 3rd generation Haldex clutch

Design of the multi-plate clutch

All-wheel drive control unit

Electric feed pump

Pressure control - 3rd generation Haldex clutch

Base pressure

Increased base pressure (preload)

Pressure build-up

Design of the 4th generation Haldex clutch

Pressure control - 4th generation Haldex clutch