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ASR-Traction Control, State of the Art and Some Prospects
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English
Abstract
Closed loop vehicle control comprising of the driver, the vehicle and the environment is now achieved by the automatic wheel slip control combination of ABS and ASR.
To improve directional control during acceleration, the Robert Bosch Corporation has introduced five ASR-Systems into series production. In one system, the electronic control unit works exclusively with the engine management system to assure directional control. In two other systems, brake intervention works in concert with throttle intervention.
For this task, it was necessary to develop different highly sophisticated hydraulic units. The other systems improve traction by controlling limited slip differentials. The safety concept for all five systems includes two redundant micro controllers which crosscheck and compare input and output signals.
A Traction Control System can be achieved through a number of torque intervention methods. The most important are the ability to:
- adjust throttle angle
- interrupt fuel injection
- brake the drive wheels.
Within future traction control concepts priorities of traction, directional control, comfort and cost objectives will be influenced by the individual drivetrain (FWD, RWD, 4WD).
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Authors
Topic
Citation
Sigl, A. and Demel, H., "ASR-Traction Control, State of the Art and Some Prospects," SAE Technical Paper 900204, 1990, https://doi.org/10.4271/900204.Also In
References
- Maisch Wolfgang Dr. Jonner Wolf-Dieter Sigl Alfred Traction Control - A Logical Addition to ABS SAE International Congress and Exposition February 23 - 27 1987 Detroit, Michigan
- Kolberg Gerhard 1985
- Demel Herbert Hemming Herbert ABS and ASR for Passenger Cars - Goals and Limits SAE International Congress and Exposition February 27 March 1989 Detroit, Michigan
- Demel Herbert Sigl Alfred Possible approaches to a traction control system EAEC Conference June 14 - 16 1989 Palais des Congres, Strasbourg