Wabco Gmbh

Frank Pietsch

Detlev Neuhaus

Wolfgang Stehr

Jochen Kalter

A method and device prevents damage to a vehicle approaching an obstacle, such as, for example, a loading ramp, while traveling in reverse. When a vehicle, particularly a vehicle train consisting of a towing vehicle and a trailer or semi-trailer, approaches an obstacle in reverse travel, there exists the possibility that the vehicle may impact the obstacle as a result of an erroneous estimation or inappropriate driving maneuver, potentially resulting in damage to the vehicle and/or to the obstacle. This problem occurs with relative frequency, particularly when approaching a loading ramp. In accordance with the invention, the driver of the vehicle is assisted during reverse travel such that damage due to excessive impact is automatically avoided, independently of the driver's actions. A distance sensor is installed on the vehicle, near the tail, which transmits a signal representative of the distance from an obstacle to an electronic control device. The electronic control device evaluates the distance value measured by the distance sensor and adapts the speed of the vehicle during reverse travel in accordance with a predetermined algorithm in such manner that the approach to the obstacle takes place without damage to the vehicle and/or the obstacle. The control device advantageously influences the braking system of the vehicle and, if necessary, the drive engine, in a suitable manner.

Method and device for assisting a driver during reverse travel

A star coupler for serial bus systems operates in compliance with the carrier sense multiple access (CSMA) method. The star coupler connects a plurality of individual bus systems to corresponding T-drivers and associated logic circuits, so that arbitration is performed within the total bus system in which all individual bus systems are included. Feedback suppression is used to assure unidirectional data flow, while error detection is combined with switching logic to disable faulty individual bus systems without affecting the other connected individual bus systems.

Growing community of inventors

Ronnenberg, Germany

Frank Pietsch