Triggering circuit for a crash sensor-controlled protective system in a vehicle
First Claim
1. In a vehicle including an electrical system and a vehicle occupant protective system having at least one gas generator, a triggering circuit for the protective system, comprising:
- a plurality of firing capacitors connected to the electrical system and to the at least one gas generator of the vehicle, said firing capacitors being charged before an accident to a capacitor voltage from the electrical system, as an energy source for firing the at least one gas generator; and
at least one crash sensor connected to said firing capacitors controlling the protective system by detecting an occurrence of sensor values triggering the firing and having at least one single contact controlling the firing of the at least one gas generator by discharging a respective one of said firing capacitors;
said plurality of firing capacitors being connected in parallel before the accident and then charged to a capacitor voltage corresponding to the voltage of the electrical system, and being switched-over to be connected in series with low-impedance upon the occurrence of the accident, by said at least one single contact, for setting an instantaneous total voltage through said series connection to be greater than individual capacitor voltages, at least at the start of firing; and
said at least a single contact feeding the total voltage to the at least one gas generator with low-impedance.
1 Assignment
0 Petitions
Accused Products
Abstract
A triggering circuit for a crash sensor-controlled protective system for the occupant of a vehicle includes a firing capacitor being charged to a capacitor voltage by the electrical system of the vehicle before an accident, as an energy source for firing a gas generator, that is for firing an explosive charge or for firing a firing cap of an explosive charge. At least one crash sensor detects the occurrence of the sensor values that trigger the firing and controls the firing of the gas generator by one or more contacts by discharging the firing capacitor. A plurality of firing capacitors which are provided in a switching-over manner are connected in parallel before an accident and then charged to a capacitor voltage corresponding to the voltage of the electrical system of the vehicle and in the case of an accident are connected in series in a low-impedance manner by at least one single contact in such a way that, at least at the start of firing, the instantaneous total voltage through the series connection is greater than the individual capacitor voltages in themselves. The total voltage can be fed to the gas generator in a low-impedance manner by at least one single contact.
19 Citations
15 Claims
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1. In a vehicle including an electrical system and a vehicle occupant protective system having at least one gas generator, a triggering circuit for the protective system, comprising:
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a plurality of firing capacitors connected to the electrical system and to the at least one gas generator of the vehicle, said firing capacitors being charged before an accident to a capacitor voltage from the electrical system, as an energy source for firing the at least one gas generator; and at least one crash sensor connected to said firing capacitors controlling the protective system by detecting an occurrence of sensor values triggering the firing and having at least one single contact controlling the firing of the at least one gas generator by discharging a respective one of said firing capacitors; said plurality of firing capacitors being connected in parallel before the accident and then charged to a capacitor voltage corresponding to the voltage of the electrical system, and being switched-over to be connected in series with low-impedance upon the occurrence of the accident, by said at least one single contact, for setting an instantaneous total voltage through said series connection to be greater than individual capacitor voltages, at least at the start of firing; and said at least a single contact feeding the total voltage to the at least one gas generator with low-impedance. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification