Ford Kuga

 Service Manual

Rear Drive Axle/Differential » Rear Drive Axle and Differential (System Operation and Component Description)
Design of the 3rd generation Haldex clutch

The Haldex clutch is based on the principle of a simple wet clutch that distributes the torque variably between the front and rear axles.

Three components are linked within the Haldex clutch:

• A mechanical component, comprising input and output shafts, the plate assembly (clutch) as well as the cam plate and the roller bearing.
• A hydraulic component, essentially comprising pressure valves, a pressure accumulator, the control valve, the ring pistons and a fluid filter.
• The electronic control comprises the electric fluid pump and the all-wheel drive control unit with integrated pressure/temperature sensor and an actuator motor for the control valve.

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