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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.

Today, the term “suspension control” includes both damping control and spring control. Only special forms of springs are easy to control, for instance air-suspension springs or hydropneumatic springs. Apart from this, a spring's control range and its dynamic forces are smaller in comparison to those of a damper. The following article confines itself therefore to the description of a damping-control system, and applies the term “damping control” in all cases in which the term is technically applicable. This paper describes the new discrete semi-active damping control (System I) which is being developed jointly by BOSCH and MONROE to the series-production stage. This system uses dampers which are adjustable in two stages, and which provide for improved passenger-car ride safety and ride comfort.

This address presents the ongoing development of the commercial-vehicle braking system, over and beyond ABS/ASR, towards a brake by wire system (electronically controlled braking system ELB) with pressure-regulating circuit and additional functions. Following the discussion and selection of various concepts, we will present different versions with individual and combined components for the towing vehicle and for the trailer. The safety concept of a pneumatic back-up circuit will be dealt with, as well as the communication through data bus (CAN) both within the braking system itself and with other vehicle systems. The improvement possibilities inherent in ELB will be detailed, with the emphasis on increasing road and traffic safety, on reducing operating costs, and on future vehicle-guidance functions.

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.

Bosch's antilock braking system (ABS) is available for any type of vehicle design. It has been developed in cooperation with vehicle manufacturers and users. Safety and reliability were the eminent targets of this development. A new feature is a self-diagnostic system.