Fault detection device for occupant protective systems

Details Fault detection device for occupant protective systems Fault detection device for occupant protective systems

1990-03-28

1992-06-16

Ng, Jin F.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

180282, 280735, 340436, B60Q 100

Patent

active

051227800

ABSTRACT:
A fault detection device for an occupant protective system for use in an automotive vehicle, which has a plurality of squibs connected in parallel with each other. A common signal is generated for actuating the squibs to operate the system when the vehicle undergoes deceleration in excess of a predetermined value. A squib circuit has the squibs, at least one resistance connected to the squibs in such a manner that a slight amount of current flows through the squibs, and a unilateral conductive element connected to the squibs and the resistance in such a manner that the slight amount of current flows through the squibs in a predetermined single direction. A fault detection circuit detects a fault in any of the squibs based on a potential at a predetermined location in the squib circuit.

REFERENCES:
patent: 3622974 (1971-11-01), Best et al.
patent: 3818431 (1974-06-01), Hosaka
patent: 4641041 (1987-02-01), Mattes et al.
patent: 4893109 (1990-01-01), Vrabel et al.

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