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Occupant protection device

A technology for protecting devices and occupants, which is applied in the directions of pedestrian/occupant safety arrangement, transportation and packaging, and thin material handling.

Inactive Publication Date: 2013-12-04
DENSO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The inventors of the present disclosure have found the following disadvantages: in an occupant protection device such as an airbag, since the signal line and the ignition voltage line are arranged separately, the configuration requires more man-hours and is heavier and larger due to the line. installation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0022] (Configuration of the first embodiment)

[0023] Such as figure 1 As shown, the occupant protection device 1 according to the first embodiment of the present disclosure is provided with an airbag ECU 2 , a two-wire parallel connection bus 3 whose base part is connected to the ECU 2 , a plurality of auxiliary sensors connected in series to the parallel connection bus 3 41 , 42 , . . . , 4T-1 , 4TD and squib 6 connected to parallel connection bus 3 .

[0024] The technical feature of the first embodiment may be that the squib 6 connected in series to the accident prevention diode 4D is connected at the terminal of the parallel connection bus 3 and the ECU 2 is used to apply the ignition voltage to the squib 6 at the time of collision, so that the squib 6 applied to the squib The firing voltage of tube 6 has the opposite polarity to the sensor driving voltage. That is, in the case where the control board 24 of the ECU 2 determines that a collision has occurred based on t...

no. 2 example

[0050] (Configuration and technical effects of the second embodiment)

[0051] In the occupant protection device according to the second embodiment of the present disclosure, as image 3 As shown, an accident prevention diode 6D is included in a two-terminal squib 6A connected to a terminal of the parallel connection bus 3 .

[0052] Therefore, the auxiliary sensors 41 , 42 , and 4T constituting the auxiliary sensor array 4 can all have the same specifications. Compared to the first embodiment, there is no need to insert accident prevention diodes into auxiliary sensors in the terminals of the parallel connection bus 3 .

[0053] Therefore, according to the first modified example of the second embodiment, in addition to obtaining similar technical effects to those of the first embodiment, protection against accidental explosion can be improved when auxiliary sensors are added, for example, by design changes.

[0054] (First Modification of Second Embodiment)

[0055] As a f...

no. 3 example

[0058] (Configuration and Technical Effects of the Third Embodiment)

[0059] Such as Figure 5 As shown, the occupant protection device 1D according to the third embodiment of the present disclosure includes a four-terminal squib 6B connectable in the middle of the parallel connection bus 3 . The four-terminal squib 6B includes an accident prevention diode 6D. The squib 6B is inserted into the base portion of the parallel connection bus 3 and connected to the vicinity of the connection port 29 of the ECU 2 . According to the third embodiment, of the two lines 31 , 32 connecting the bus 3 in parallel, only the portion between the ECU 2 and the squib 6B can resist a large current.

[0060] According to the third embodiment, even when a large current flows to the squib 6B through the ignition voltage in a collision, the large current does not flow over the squib 6B to the auxiliary sensor array 4, so that the auxiliary sensor array 4 is protected from the large current . The...

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PUM

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Abstract

An occupant protection device includes (i) an electronic control unit having a control board, (ii) a parallel connection bus having two lines, (iii) multiple satellite sensors connected to the parallel connection bus, (iv) a squib connected to the parallel connection bus, and (v) an accident prevention diode located close to the squib. The control board includes an interface and a processor. Each of the satellite sensors includes a distributed system interface which is located between the two lines. The parallel connection bus is supplied with a sensor drive voltage. The electronic control unit starts to operate at least one of the occupant protection portions based on a result of the collision determination by the control board.

Description

technical field [0001] The present disclosure relates to a device for protecting an occupant from impact in the event of a collision or the like in a vehicle such as an automobile, an airplane, a boat, or the like. For example, the present disclosure may be applied to occupant protection devices including air bag systems for automobiles. Background technique [0002] In the technical field of such occupant protection devices, signal lines or communication buses are usually arranged separately from the ignition voltage line. Signal lines or communication buses are used by electronic control units (ECUs) to receive signals from sensors for detecting collisions. The ignition voltage line is connected to a squib which activates the inflator of the airbag and inflates the airbag. [0003] In JP-A-2006-015807 corresponding to US / 20060000948A, although a circuit configuration of an ECU for igniting a squib is disclosed, a description about a sensor system is omitted. Therefore, ...

Claims

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Application Information

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IPC IPC(8): B60R21/013
CPCB60R21/013Y10T137/1647B60R21/00B60R21/01B60R21/0176B60R21/02
Inventor 大薮真二
Owner DENSO CORP
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