The Audi Quattro car has another additional differential, the so-called. middle or intermediate, located between the front and rear axles and designed to equalize the difference in the speed of the front and rear wheels.
Differential locks are activated at the moment when, for example, the wheel of one axle begins to turn on a slippery section of the road at a time when the other wheels at that moment are on a hard surface and do not slip.
There is an undesirable difference in the speed of the wheels of the two axles. To prevent and even out this difference, an additional automatic differential lock is designed, which, in the current traffic situation, automatically blocks the slipping wheel, and at the same time transfers the driving force to another axle, where the wheels have good grip on the road.
A similar principle of operation of the rear axle differential lock.
This blocker is primarily designed for smooth starting and acceleration of the car.
Procedure for switching on the rear axle differential lock
Differential lock actuated by pressing a button "DIFF", located on the center console next to the parking brake lever. It can turn on or off both before the start of the movement, and while driving at speeds up to 25 km / h.
Pressing the key only turns on the device. The blocking works only in appropriate conditions, when there is a big difference in the speed of rotation of the rear wheels. As soon as the vehicle speed exceeds 25 km/h, the blocking is automatically deactivated.
At the same time, remember that when the vehicle speed drops below these indicators, the system does not automatically turn on.
The operation of the differential lock is monitored by a control lamp located on the panel in front of the key "DIFF". It lights up when the locking device is actually turned on.
At the same time, the control lamp lights up "ABS", since when the differential lock is activated, the anti-lock braking system "ABS" turns off. After the blocker is turned off, the lamp will go out. If this control lamp does not light up when the blocking device is turned on, check the electrical equipment for proper operation.
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