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Airbag safety arrangement

IP.com Disclosure Number: IPCOM000124712D
Publication Date: 2005-May-04
Document File: 2 page(s) / 36K

Publishing Venue

The IP.com Prior Art Database

Abstract

An airbag that for safety reasons is provided in a driver's compartment of a vehicle also poses a potential risk, should it accidentally be released under incorrect circumstances, e.g. during work being performed in the driver's compartment. Such accidental release of the airbag could be fatal to a person performing work in the compartment. The present invention utilizes signals from a speed sensor (ABS-sensor) provided in the vehicle to prevent the airbag from being released when the vehicle is standing still or moves backwards. The signal from the ABS sensor is hereby used to verify movement of the vehicle and the direction of movement. The triggering of the airbag is according to the invention controlled by an airbag control unit that receives two independent signals, i.e. both the signal from a retardation sensor and the signal from the ABS sensor that indicates forward movement of the vehicle.

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Airbag safety arrangement

Many vehicles today are for safety reasons provided with one or more airbags in the driver’s compartment. The airbag is triggered by an airbag sensor, e.g a retardation sensor, so that the airbag is released and inflated in case of strong retardation. However, the airbag also poses a potential risk, should it accidentally be released under incorrect circumstances, e.g. during work being performed in the driver’s compartment, during performance of workshop service or when the vehicle moves backwards in order to connect a trailer. Such accidental release of the airbag could for example be caused by static electricity and could be fatal to a person performing work in the compartment. It is therefore desirable to provide a safety arrangement to prevent the airbag from being released when the vehicle is standing still or moves backwards.

In order to prevent locking of the wheels during braking operation, many vehicles are provided with an antilock break system (ABS). Such system utilizes at least one speed sensor (ABS sensor) that detects the movements of the wheels. It is known in the art to use the signal from such speed sensor provided in the vehicle in order to improve the function of an airbag in case of a collision. The present invention, however, utilizes signals from the speed sensor (ABS-sensor) of the vehicle to prevent the airbag from being released when the vehicle is standing still or moves backwards. The signal from the ABS sensor is hereby used to verify movement of the vehicle and the direction of movement. The triggering of the airbag is according to the invention controlled by an airbag control unit that receives two independent signa...