Продукция бренда Audi

Multi-plate clutch

At the heart of the system is a multi-plate clutch, which is control-

led electronically and actuated hydraulically. The clutch control

unit permanently analyses the driving conditions. If slip occurs at

the front wheels, an electrically driven annular piston pump

almost instantaneously generates the oil pressure needed by the

clutch to divert the drive torque almost entirely from the front to

the rear wheels.

Thanks to a high-performance pressure reservoir, all of this hap-

pens within a matter of milliseconds.

To make the already good axle load distribution even better, the

clutch is now mounted on the end of the prop shaft in front of the

rear axle differential. This clutch is likewise a recently developed,

highly compact component, and it designed to withstand the rig-

ours of heavy use.

Reference

The design and function of the generation IV all-wheel-drive clutch are described in Self-Study Programme 414 "4MOTION

with generation IV all-wheel-drive clutch".

451_063

Drive shaft All-wheel drive control unit J492

Rear axle differential drive pinion Crown wheel

Rear axle differential

All-wheel drive

clutch plate

assembly

All-wheel drive clutch oil

reservoir