JP2014094613A - Air bag disposal controller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the reliability of an air bag disposal controller by stopping actuation of an air bag device due to execution of a disposal program at unintended timing and thereby preventing erroneous expansion of the air bag.SOLUTION: An air bag disposal controller is provided with disposal control means of expanding forcibly an air bag of a disused air bag device and an external device to be connected to the disposal control means on execution of a disposal operation. After connected to the disposal control means, the external device transmits a preliminarily stored disposal program for actuating the air bag device to the disposal control means through a transmission means, and the disposal control means actuates the disused air bag to expand the air bag forcibly according to the disposal program transmitted by the transmission means.

Description

  The present invention relates to an airbag discard control device, and more particularly to an airbag discard control device that prevents malfunction of an airbag device caused by a discard program for forcibly deploying an airbag.

When discarding an unnecessary airbag device, the airbag device is operated by the airbag disposal control device to forcibly deploy the airbag device.
In a conventional airbag disposal control device, in Japanese Patent Application Laid-Open No. 11-301389, a disposal command is written from the outside to a storage means (EEPROM) at the time of disposal processing of the airbag device, and the disposal processing control means is stored when the ignition switch is turned on. A system for forcibly deploying an airbag by operating an airbag device based on a discard program when a discard command is written with reference to a written value of a discard command of the means is disclosed.

Japanese Patent Laid-Open No. 11-301395

However, in the conventional airbag discard control device, there is a discard program for operating the airbag device inside the discard processing control means.
As shown in FIG. 4, in the airbag discard control device, when a control program starts (A01), the ignition switch is turned on (A02), and a malfunction such as runaway occurs in the discard processing control means (A03: YES), the disposal processing control means executes the disposal program existing inside (A04), the disposal processing control means sends an ON signal to the safety circuit / drive circuit (A05), and supplies power to the inflator of the airbag device Then, the airbag is inflated to cause a misdeployment of the airbag (A06), and the program ends (A07).
For this reason, an airbag disposal control device having a disposal processing control means having a disposal program executes the disposal program at an unintended timing due to a failure of the disposal processing control means, and operates the airbag device to erroneously detect the airbag. There is a possibility to deploy.

  The present invention prevents the airbag device from being actuated by executing a disposal program for forcibly deploying the airbag of the airbag device that is no longer needed at an unintended timing, thereby preventing erroneous deployment of the airbag. The object is to improve the reliability of the bag disposal control device.

  The present invention relates to an airbag disposal control device including a disposal processing control means for forcibly deploying an airbag of an airbag device that is no longer needed, and an external device connected to the disposal processing control means when performing the disposal processing. And, after connecting the external device to the disposal processing control means, the external device comprises transmission means for transmitting a disposal program for operating the airbag device stored in advance to the disposal processing control means, The discard processing control means operates the airbag device that is no longer necessary based on the discard program transmitted by the transmission means to forcibly deploy the airbag.

  In the present invention, since the disposal program exists in the disposal processing control means only when the disposal process is executed, the operation of the airbag device resulting from the execution of the disposal program at an unintended timing is prevented, and the airbag is erroneously deployed. Can be prevented, and the reliability of the airbag disposal control device can be improved.

FIG. 1 is a system configuration diagram of an airbag disposal control device. (Example) FIG. 2 is a control flowchart of the disposal process. (Example) FIG. 3 is a control flowchart when a failure occurs in the disposal processing control means. (Example) FIG. 4 is a control flowchart when a failure occurs in the disposal processing control means. (Conventional example)

  Embodiments of the present invention will be described below with reference to the drawings.

1 to 3 show an embodiment of the present invention. In FIG. 1, a vehicle airbag device 1 includes an inflator 2 for deploying an airbag. The airbag disposal control device 3 that performs disposal processing of the airbag device 1 that is no longer required includes a power supply circuit 4, a safety circuit 5, two drive circuits 6 and 7, and a disposal processing control means 8. Yes. The power supply circuit 4, the safety circuit 5, the two drive circuits 6 and 7, and the inflator 2 are connected in series between the ignition switch 10 and the ground 11 by an electric circuit 9.
The power supply circuit 4 supplies and stops power to the electric circuit 9 by turning on and off the ignition switch 10. The safety circuit 5 turns off (cuts off) the electric circuit 9 during normal traveling of the vehicle, and turns on (connects) the electric circuit 9 when excessive acceleration is applied to the vehicle. The drive circuits 6 and 7 turn on (connect) the electric circuit 9 when an excessive acceleration action is applied to the vehicle. The disposal control means 8 sends an ON signal to the safety circuit 5 and the two drive circuits 6 and 7 when operating the airbag device 1 that is no longer needed, supplies power to the inflator 2 and inflates it, Force the airbag to deploy.

The airbag disposal control device 3 includes a disposal tool 12 as an external device connected to the disposal processing control means 8. The disposal tool 12 communicates by connecting to the disposal processing control means 8 via the connection line 13 when executing the disposal processing of the airbag device 2. The disposal tool 12 includes a storage unit 14 and a transmission unit 15. The storage unit 14 stores in advance a discard program for operating the airbag device 1 to forcibly deploy the airbag. The transmission unit 15 transmits the discard program stored in advance in the storage unit 14 to the discard process control unit 8.
The discard processing control unit 8 includes a receiving unit 16 and a storage unit 17. The receiving unit 16 receives the discard program transmitted via the connection line 13 by the transmitting unit 15 of the discard tool 12. The storage unit 17 stores the received discard program. The discard processing control means 8 executes the discard program stored in the storage unit 17 in accordance with a discard command from the discard tool 12. The disposal processing control means 8 transmits an ON signal to the safety circuit 5 and the drive circuits 6 and 7 based on the disposal program, and supplies the power of the power circuit 4 to the inflator 2 of the airbag apparatus 1 that is no longer needed. Then, a disposal process for forcibly deploying the airbag is executed.
The discard processing control unit 8 includes an erasing unit 18. The erasing unit 18 erases the discard program stored in the storage unit 17 after normally operating the inflator 2 of the airbag apparatus 1 that is no longer needed by executing the discard program to forcibly deploy the airbag. To do. As a result, the discard program erases from the storage unit 17 in the discard processing control means 8 after the airbag apparatus 1 that has become unnecessary by the discard processing control means 8 is operated normally and the airbag is forcibly deployed. Is done.

Next, the operation will be described.
The airbag disposal control device 3 connects the disposal tool 12 to the disposal processing control means 8 when the airbag device 1 is disposed. As shown in FIG. 2, in the airbag disposal control device 3, the disposal processing control program of the airbag device 1 is started by the disposal processing control means 8 (B01), the ignition switch 10 is turned on (B02), and the disposal is performed. The processing control means 8 determines whether or not the reception of the discard program transmitted from the discard tool 12 has been completed (B03).
If this determination (B03) is NO, this determination (B03) is repeated. The discard processing control means 8 completes reception of the discard program and stores it in the storage unit 17. If this determination (B03) is YES, a discard command is transmitted from the discard tool 12 to the discard processing control means 8 ( B04), the discard processing control means 8 that has received this discard command executes the discard program stored in the storage unit 17 (B05), and transmits an ON signal to the safety circuit 5 and the drive circuits 6 and 7 (B06). The power supply is supplied to the inflator 2 of the airbag device 1 to inflate it to complete the deployment of the airbag (B07), and it is determined whether the ignition switch 10 is turned off (B08).
If this determination (B08) is NO, this determination (B08) is repeated. If this determination (B08) is YES, the discard program stored in the storage unit 17 of the discard processing control means 8 is deleted (B09), and the program is ended (B10).

  The airbag discard control device 3 erases the discard program stored in the storage unit 17 when the ignition switch 10 is turned off. Then, as shown in FIG. 3, the control program starts (C01), and the ignition switch 10 is turned on. (C02) If a failure occurs in the discard processing control means 8 (C03: YES), the discard program stored in the storage unit 17 in the discard processing control means 8 is erased and does not exist (C04). Is not executed, there is no misdeployment of the airbag (C05), and the program ends (C06).

Thus, the airbag discard control device 3 transmits the discard program from the discard tool 12 to the discard processing control means 8, and the discard program exists in the discard processing control means 8 only when the discard processing is executed. The operation of the airbag device 1 due to execution at an unintended timing of the airbag can be prevented to prevent the airbag from being erroneously deployed. Thereby, the reliability of the airbag disposal control device 3 can be improved.
The disposal processing control unit 8 deletes the disposal program from the storage unit 17 in the disposal processing control unit 8 after normally operating the airbag apparatus 1 that is no longer necessary to forcibly deploy the airbag. As a result, there is no discard program for business affairs other than at the time of executing the discard process, so that the reliability of the operation of the airbag apparatus 1 can be improved.
In FIG. 1, the airbag disposal control device 3 that controls disposal development by one of the disposal processing control means 8 is illustrated, but the airbag disposal control device having redundancy by the safety control means is also shown in this figure. The invention is applicable. The discard program may be transmitted via a personal computer instead of the discard tool 12.

  The present invention prevents the airbag from being erroneously deployed due to execution of the discard program at an unintended timing by causing the discard processing control means to have a discard program only when executing the discard processing. The present invention can be applied not only to a device but also to a control device that receives an execution command from an external device and executes an internal program.

DESCRIPTION OF SYMBOLS 1 Airbag apparatus 2 Inflator 3 Airbag disposal control apparatus 4 Power supply circuit 5 Safety circuit 6/7 Drive circuit 8 Discarding control means 9 Electric circuit 10 Ignition switch 11 Grounding 12 Discarding tool 13 Connection line 14 Storage part 15 Transmission means 16 Reception means 17 Memory 18 Erasing means

Claims (2)

  An airbag disposal control device comprising a disposal processing control means for forcibly deploying an airbag of an airbag device that is no longer needed, comprising an external device connected to the disposal processing control means when performing the disposal processing, After the apparatus is connected to the disposal processing control means, the external device includes a transmission means for transmitting a disposal program for operating the airbag device stored in advance to the disposal processing control means, and the disposal processing control The means operates the airbag apparatus that is no longer necessary based on the discard program transmitted by the transmitting means to forcibly deploy the airbag.   The discard program is erased from the discard process control unit after the airbag apparatus that has become unnecessary by the discard process control unit is normally operated to forcibly deploy the airbag. The airbag disposal control device according to claim 1.

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