Toyota
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

Design of the 3rd generation Haldex clutch

Item Description
1 Multiplate clutch
2 Ring piston pump
3 All-wheel drive control unit
4 Pressure relief valve (high pressure)
5 Input shaft
6 Electric feed pump
7 Fluid filter
8 Pressure accumulator
9 Pressure relief valve (low pressure)
10 Preload valve
11 High-pressure valves

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.
    More about «Rear Drive Axle and Differential (System Operation and Component Description)»:

    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

    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

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