Method for releasing an airbag in a motor vehicle

Details Method for releasing an airbag in a motor vehicle Method for releasing an airbag in a motor vehicle

1994-09-09

1995-08-29

Rice, Kenneth R.

Land vehicles

Wheeled

Attachment

180268, 36442405, B60R 2132, G01P 1500, G01D 104

Patent

active

054454131

ABSTRACT:
A method and system for releasing an airbag in a motor vehicle utilizes an acceleration signal which is measured and processed for the formation of a release criterion. An impact causes an initial increase in the release readiness, which is cancelled after a short period of time if no release has taken place up to that time. In particular in the case of impact processes with moderate acceleration values, such as for example in an offset pole crash, there is the risk that the airbag is released so late that an occupant who has already been substantially displaced forwards towards the steering wheel is additionally endangered by the explosive opening of the airbag. The cancellation of the increased release readiness is controlled by a state variable which corresponds to the forward displacement of an occupant and is obtained by double integration from the acceleration signal with respect to time. The cancellation takes place when the forward displacement exceeds a critical value.

REFERENCES:
patent: 4985835 (1991-01-01), Sterler et al.
patent: 5014810 (1991-05-01), Mattes et al.

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