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The paper begins with an overview of the history of ABS for commercial vehicles followed by a brief description of the technology of the BOSCH ABS at the time it went into mass production in 1981. Subsequently it describes the field experiences with ABS including the experiences of drivers and operators. These experiences are reflected in the equipment which BOSCH offers today. Additional functions such as ASR (traction control) have been integrated. The paper provides an overview of the functions available today and their implementation. The paper concludes with a discussion on potential continued developments and an attempt to describe the systems which will be required by the mid 9os.

The antilock system (ABS) for commercial vehicles and buses has become increasingly popular since its market introduction in 1981. Several vehicle manufacturers already equip their vehicles with ABS as standard, instead of only if specifically requested, and have been doing so for some years now. The advantages of ABS have become clear during the 7 years of field operation; Increase in safety for all traffic participants. High system availability. Economy of vehicle operation

The major progress in braking systems in the last years has been the introduction of ABS. Since literature regarding antiskid braking systems for commercial vehicles is available in growing numbers, the objective of this paper is to deepen the knowledge of components. In terms of ABS the different concepts of pneumatic pressure modulation valves and their advantages are compared. There is a discussion on further improvements in air brake systems, such as reducing of response time of pneumatic braking by means of an entirely new approach. The paper continues with traction control and deals with improvements of the efficiency of air compressors. Also the market of commercial vehicles is evaluated.