Air-bag control circuit
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Sep 26, 2000
Issued Date -
N/A
app pub date -
Apr 23, 1998
filing date -
Aug 24, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A control circuit for an air-bag mounted in a motor vehicle comprises an acceleration sensor for producing an acceleration signal indicative of acceleration of the vehicle, an ignition timing circuit for processing the acceleration signal to predict the time when a passenger's head will reach a front surface of the air-bag in fully deployed condition and producing a first air-bag deploying signal in accordance with the predicted time, and a damage discrimination circuit for processing the acceleration signal and judging the need of activation of the air-bag when the cumulative effect of the acceleration exceeds a predetermined limit. The damage discrimination circuit produces a second air-bag deploying signal when judging the need of activation of the air-bag. A so-called AND circuit is further employed which actually activates the air-bag when receiving the first and second air-bag deploying signals concurrently.
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