3310013 - E7021 ASR / TCS - Description (VDC, Automatic transmission)
Description
The AntiSlip Regulation function (ASR) controls car traction by cutting in automatically whenever one or both drive wheels begin to slip.The system uses the ABS sensors to detect when one or both side wheels are beginning to slip and reduce power transmitted by the engine in order to adjust to road surface grip.One of two different control systems is activated according to the slip conditions:
- If the slip affects both drive wheels and is caused by too much transmitted power, the ASR system intervenes to reduce engine power.
- If only one drive wheel is slipping, the ASR system cuts in to brake the slipping wheel automatically in much the same way as a self-locking differential.
The ASR system helps increase car stability and active safety during driving, particularly under the following conditions:
- Wheel slip on bends, due to the effect of dynamic load changes or excessive acceleration.
- Too much power transmitted to the wheels, especially when the road surface is slippery.
- Acceleration over loose, snow-covered or icy road surfaces.
- If grip is lost on wet ground (acquaplaning)