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 l

Method used

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Examples

Experimental program
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Example

[0021] (First embodiment)

[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 ECU2, a two-wire parallel connection bus 3 whose base part is connected to the ECU2, and a plurality of auxiliary sensors connected in series to the parallel connection bus 3 41, 42,..., 4T-1, 4TD and the detonator 6 connected to the parallel connection bus 3.

[0024] The technical feature of the first embodiment may be that the detonating tube 6 connected in series to the accident prevention diode 4D is connected to the terminal of the parallel connection bus 3 and the ECU 2 is used to apply an ignition voltage to the detonating tube 6 in the event of a collision, so that the The ignition voltage of the 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...

Example

[0049] (Second embodiment)

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

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

[0052] Therefore, the auxiliary sensors 41, 42, 4T constituting the auxiliary sensor array 4 can all have the same specifications. Compared with the first embodiment, it is not necessary to insert the accident prevention diode into the auxiliary sensor in the terminal connected to the bus 3 in parallel.

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

[0054] (First modification of the second e...

Example

[0057] (Third embodiment)

[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 that can be connected in the middle of the parallel connection bus 3. The four-terminal squib 6B includes an accident prevention diode 6D. The detonator 6B is inserted into the base part 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, only the portion between the ECU 2 and the squib 6B of the two wires 31, 32 connecting the bus 3 in parallel can resist a large current.

[0060] According to the third embodiment, even when a relatively large current flows through the ignition voltage to the detonator 6B in a collision, the relatively large current will not jump over the detonator 6B and flow to the auxiliary sensor array 4, so that the a...

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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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