Robert Boschgmbh

Hans-Peter Lang

Bernhard Mattes

Kosmas Knoedler

Juergen Kissner

Walter Wottreng

Joachim Bauer

Volker Breunig

In order to perform a simple plausibility check of a rollover decision which is as reliable as possible, an arrangement is provided which signal plausibility of the rollover decision if an acceleration measured in the direction of the vertical axis of the vehicle is either above a preset upper threshold or below a preset lower threshold, or if the acceleration measured in the direction of the vertical axis is between the two thresholds, but an acceleration measured in the direction of the transverse axis of the motor vehicle simultaneously exceeds a threshold which depends on the acceleration measured in the direction of the vertical axis.

Arrangement for plausibilizing a rollover decision

The system is intended to have the ability to differentiate between various characteristic driving maneuvers, so that a special triggering algorithm of restraint devices can be initiated for each class of driving maneuvers. This system has an acceleration sensor that measures the acceleration of the vehicle in the direction of its vertical axis. A classifier is provided which, when the measured acceleration is above a threshold of 1 g, decides on a driving maneuver in which the vehicle lifts upward on one side, as when driving on a ramp. If the measured acceleration is between 0 g and 1 g, then the classifier decides on a driving maneuver during which the vehicle tips downward on one side, as when driving on a slope.

Device for classifying various driving manoeuveres

The arrangement is to allow timely rollover recognition in the event of tipping over an embankment. For this purpose, the arrangement determines a predictive value of the yaw rate of the vehicle after a fictitious impact of the wheels on one longitudinal side of the vehicle against the ground from a yaw rate prevailing prior to the fictitious impact, the momentum of the vehicle in the direction of its vertical axis, and the angular momentum of the center of gravity of the vehicle prior to the fictitious impact. In addition, using the currently measured angle of inclination of the vehicle, it determines a critical yaw rate of the vehicle about its longitudinal axis instantaneously measured by the arrangement, which would be required to cause the vehicle to roll over. A conclusion is drawn about an imminent rollover if the predictive value of the yaw rate exceeds the critical yaw rate.

Device for recognizing an overturn process of a vehicle

Arrangement for detecting motor-vehicle roll-overs

Growing community of inventors

Ludwigsburg, Germany

Hans-Peter Lang