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Accessories - ASR system

ASR adjustment drive (Antriebs-Schlupf-Regelung: ASR) is a logical development of ABS.

ABS prevents the wheels from locking during braking. With this car under braking remains manageable and does not change direction.

ASR system prevents slippage of the drive wheels when starting, set the speed during the trip, for example, different traction, cornering and sudden maneuvers to change direction. So it carried optimal traction.

ASR operates in two different planes, if one or both skids wheel corresponding to the wheel is braked. This automatically reduces the engine power.

Available in the ABS components are complemented by ASR systems for hydraulics, electronics and electronic accelerator pedal (E - Gas). When you e-pedal the throttle is electronically controlled electric motor.

Using four sensors common to ABS and ASR device measures the speed of all four wheels, and processes information.

At the beginning of the slip in the corresponding brake pressure is increased, and the wheel is braked automatically. If the brake pressure reaches the wheel brakes. It is kept constant. If the number of turns close to the optimum, the pressure decreases. With this wheel works in an optimum range of adhesion. Braking wheels while pulling away acts as differential lock. If the second wheel slips and it is regulated in the same manner.

When starting on the wheel, standing on cohesive soils, can be transferred most of the drive torque, it is also possible to pull away with a unilateral slippery road.

The same thing happens during a trip when the stalled one or both wheels and by automatically braking the vehicle driving stability is maintained.

If the rear wheel slippage leads to the automatic braking, the second wheel is on the border of slip, electronic system determines the force on the wheel as too big and in a matter of milliseconds via e-pedal produces less gas. This occurs when the driver in an emergency situation is gunning. Thanks to the electronic management of the engine torque is reduced, and on two wheels it is passed unchanged.

ASR The logic is that when wheel slip at low speeds, first-wheel brakes (adjustable brake circuit), and high speed is first reduced engine power (adjustment of drive torque).

Simultaneously, the system constantly checks to see whether improved, for example, the quality of traction with the ground and improving the entire wheel transmits power from the engine.

ASR operation indicator informs the driver that the system begins to adjust, and that the driving conditions are approaching the boundary.

The work of the ABS system does not depend on the ASR, the two systems complement each other.

When the snow is deep and the use of tire chains, as well as, for example, when driving on soft sand on all-terrain tires fine adjustment wheel slippage effect negatively on driving conditions. In such cases, a special program of work for control, selectable by the driver with the switch "Schneekettenschalter" (switch chains). This may be an increased wheel slip, the car was able to "burrow" in the above situations. Since such adjustment adversely affects driving stability at high speeds, it acts only to a speed of 38 km / h. Upon reaching a speed of 60 km / h "logic chains" is disabled. When the mode is lit sign on the switch.

The ASR system is also integrated control system probuksovochnogo torque (MSR). This prevents too much zatormozhivanie wheels when braking the motor and slip if, for example, on a slippery road to change to a lower gear in low gear or abruptly discharged gas. When starting slippage decreases the braking torque of the engine due to the automatic throttle priotkryvaniya. With this car is stabilized, which means that the effectiveness of the rear drive.