UPGRADED BOSCH ABS GOES INTO PRODUCTION
08 February 2006 - Bosch

Smaller, lighter, quieter and more efficient

Bosch has started producing a new up rated version of its Antilock Braking System (ABS). The unit is 20% smaller, lighter, quieter and more efficient in operation than previous versions. The new Bosch ABS 8.1 unit has also succeeded in further reducing braking distances, particularly on slippery surfaces, and produces less brake pedal vibrations. ''This new version meets the objectives of the OEMs for a greater reduction in weight and installation space of every single unit'' explains Klaus Meder, vice president development of the Bosch Division Chassis Systems Control.

The main improvement with the new ABS 8.1 unit is a more efficient control loop for the return pump motor, the speed of which can now be adjusted according to the driving position. This improvement has allowed engineers to use a smaller electric motor, the decisive factor in achieving a downsizing of the unit. The pump and valve triggering were also optimized during the course of the product’s development. In its most compact version, the box volume of the hydraulic unit and add-on ECU now falls below the one litre mark and weighs only 1.4 kilograms.

The variable speed control provides a further reduction in pedal vibrations and noise. Bosch engineers have also succeeded in noticeably suppressing the intensity of the high- frequency noise from the unit. The result is improvement in driver and passenger in-vehicle comfort and convenience.

On wet, snow or icy road conditions ABS 8.1 reduces stopping distance even further and because the new pump unit consumes less power than previous units, the system will not drain the vehicle’s electrical systems.

Bosch was the first supplier worldwide to offer an electronically controlled, mass-produced antilock braking system. It was first installed in 1978 in the Mercedes-Benz S-Class followed shortly after by the BMW 7-Series. Since its introduction, Bosch has produced and delivered over 130 million brake control systems with the ABS function to OEM’s all over the world.

www.bosch-presse.de

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