SSP 206 – Four-Wheel Drive with Haldex Coupling
In the Lupo, Volkswagen is expanding its range of petrol engines with a new 1.0-litre engine featuring an aluminium block and a camshaft-in-block (OHV) design.
It complies with EU III and D3 exhaust emission standards.
This compact and lightweight engine is an in-house Group development and is based on proven engine components.
The viscous coupling previously used by Volkswagen was only able to detect wheel slip, but not its cause.
The development of the Haldex coupling represents a major step forward in modern all-wheel-drive technology.
The Haldex coupling is electronically controllable. A processor also takes additional information into account during control. Slip is no longer the sole decisive factor in the distribution of drive forces; the vehicle’s dynamic state is also considered. The processor accesses the ABS wheel speed sensors and the engine control unit (accelerator pedal signal) via the CAN bus.
This data provides the processor with all the necessary information on vehicle speed, cornering, overrun, or traction mode, enabling it to respond optimally to any driving situation.
Advantages of the Haldex coupling
Permanent all-wheel drive with an electronically controlled multi-plate clutch
Front-wheel-drive driving characteristic
Fast response
No clutch strain during parking and manoeuvring
Compatible with different tyre sizes (e.g. emergency spare wheel)
No restrictions on towing with one axle raised off the ground
Fully compatible with traction control systems such as ABS, EDL, TCS, EBD, and ESP