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METHOD AND DEVICE FOR TRIGGERING MOTOR VEHICLE SAFETY MECHANISMS

  • US 3,762,495 A
  • Filed: 04/15/1971
  • Issued: 10/02/1973
  • Est. Priority Date: 07/04/1970
  • Status: Expired due to Term
First Claim
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1. In a motor vehicle equipped with a safety device triggerable into a protective position in response to a trigger signal produced during an impact the motor vehicle and another object, a method for producing a triggering signal and supplying same to said safety device comprising:

  • detecting the magnitude of deceleration resulting from an impact between the motor vehicle and another object at an initial stage of the impact, producing a first signal voltage substantially proportional to said magnitude of the deceleration, comparing said first signal voltage with a first set of reference voltages representing different predetermined decelerating magnitudes and producing a second signal voltage representing any of said predetermined decelerating magnitudes when said first signal voltage is higher than the reference voltage representing said any of the predetermined decelerating magnitudes, differentiating said first signal voltage with respect to time for producing a third signal voltage substantially proportional to the rate of the deceleration at said initial stage of the impact, comparing said third signal voltage with a second set of reference voltages representing different predetermined decelerating rates and related respectively to said predetermined decelerating magnitudes and producing a fourth signal voltage representing any of said predetermined decelerating rates when said third signal voltage is lower than the reference voltage representing said any of the predetermined decelerating rates, coupling said second and fourth signal voltages for producing a fifth signal voltage when the second and fourth signal voltages are produced coincidently, comparing said third signal voltage with a reference voltage lower than said second set of the reference voltages and producing a sixth signal voltage when said third signal voltage is higher than said reference voltage coupling said sixth reference voltage with said fifth signal voltage for producing a seventh signal voltage when said fifth and sixth signal voltages are produced coincidently, and supplying said seventh signal voltage as a triggering signal to said safety device for triggering said safety device into its protective position.

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