Device for protecting passenger in vehicle
First Claim
Patent Images
1. A device for protecting a passenger in a vehicle comprising:
- a squib which is ignited when an electric current flows thereto;
a plurality of switching elements connected in series with the squib, at least one of the switching elements being a current control switching element for controlling the electric current to a predetermined value; and
control means for controlling the current controlling switching element so that a predetermined electric current flows into the squib,wherein the control means turns on the current control switching element after the plurality of switching elements except the current control switching element have been turned on.
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Abstract
An airbag device includes an airbag control IC constructed with a control signal generating circuit, a high-side switching element and a low-side switching element. Based on a signal for controlling the low-side switching element, on a signal for controlling a safety switching element and on a check mode signal, the control signal generating circuit adjusts the timing of the signal for controlling the high-side switching element so that the high-side switching element is turned on last. Therefore, the high-side switching element is turned on last. This suppresses the occurrence of an overshoot current.
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Citations
10 Claims
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1. A device for protecting a passenger in a vehicle comprising:
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a squib which is ignited when an electric current flows thereto; a plurality of switching elements connected in series with the squib, at least one of the switching elements being a current control switching element for controlling the electric current to a predetermined value; and control means for controlling the current controlling switching element so that a predetermined electric current flows into the squib, wherein the control means turns on the current control switching element after the plurality of switching elements except the current control switching element have been turned on.
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2. A device for protecting a passenger on a vehicle comprising:
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a squib that is ignited when an electric current flows thereto; a first switching element connected to a terminal of the squib; a second switching element connected to the other terminal of the squib to ground the squib; a safety switching element, arranged between a power source and the first switching element, for connecting the power source to the first switching element; and control means for controlling the first switching element so that a predetermined electric current flows into the squib, wherein the control means turns on the first switching element after the safety switching element and the second switching element have been turned on. - View Dependent Claims (3, 4, 5, 6)
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7. A device for protecting a passenger in a vehicle comprising:
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a power source; a collision sensor that generates an output indicative of a collision of a vehicle; an electric actuator that is driven to protect a passenger when an electric current is supplied thereto; a plurality of switching elements connected in series with the electric actuator and turned on to supply the electric current to the electric actuator; and a control unit connected between the collision sensor and the plurality of switching elements to turn on the switching elements in response to the output of the collision sensor, wherein the control unit is constructed to turn on the plurality of switching elements at different time points in response to the output of the collision sensor. - View Dependent Claims (8, 9, 10)
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Specification