Method and device for controlling occupant protection means in a vehicle
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Abstract
The invention relates to a method and a device for controlling occupant protection means in a vehicle. According to said method, a first crash variable (AAA), derived from the absolute value for the crash signal of a crash sensor, preferably from the acceleration signal of an acceleration sensor, is compared with a first firing threshold (th1a, th1b, th1c). In addition, a second crash variable (wj, wv, ws), derived in a different manner from the crash signal (a) of the crash sensor (1) is compared with a second firing threshold (th2a, th2b, th2c). The occupant protection means is only fired if the first crash variable (AAA) exceeds the first firing threshold value (th1a, th1b, th1c) and simultaneously the second crash variable (wj, wv, ws) exceeds the second firing threshold (th2a, th2b, th2c).
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Citations
26 Claims
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1-11. -11. (canceled)
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12. A method for controlling an occupant protection device in a motor vehicle, which comprises the steps of:
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delivering, via a crash sensor, a crash signal;
deriving a first crash variable being an absolute value of the crash signal;
comparing the first crash variable with a first firing threshold;
comparing a second crash variable derived from the crash signal with a second firing threshold; and
controlling the occupant protection device in dependence on whether the first and second firing thresholds are exceeded. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A device for controlling an occupant protection device in a motor vehicle, the device comprising:
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an acceleration sensor for capturing accelerations during a motor vehicle crash and generating an acceleration signal;
acceleration signal processing units coupled to said acceleration sensor for converting the acceleration signal generated by the acceleration sensor into a number of crash variables, said acceleration signal processing units each having a signal output;
an activation unit;
an evaluation unit having first and second signal inputs each respectfully connected to said signal output of each of said acceleration signal processing units, said evaluation unit evaluating the crash variables fed to it, said evaluation unit outputting a firing signal to said activation unit if at least two of the crash variables exceed a firing threshold in each case;
said acceleration signal processing units containing;
a first acceleration signal processing unit having a signal output and an absolute value generator with a first input receiving the acceleration signal and a first signal output outputting an absolute value of the acceleration signal to the signal output of said first acceleration signal processing unit, the absolute value of the acceleration signal being a first crash variable; and
a second acceleration signal processing unit having an input receiving the acceleration signal from said acceleration sensor and a signal output outputting a second crash variable derived from the acceleration signal, the second crash variable being fed to said second input of said evaluation unit. - View Dependent Claims (23, 24, 25, 26)
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Specification