WO2002014119A1 - Systeme de coussin gonflable - Google Patents

Systeme de coussin gonflable Download PDF

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Publication number
WO2002014119A1
WO2002014119A1 PCT/JP2000/005378 JP0005378W WO0214119A1 WO 2002014119 A1 WO2002014119 A1 WO 2002014119A1 JP 0005378 W JP0005378 W JP 0005378W WO 0214119 A1 WO0214119 A1 WO 0214119A1
Authority
WO
WIPO (PCT)
Prior art keywords
ecu
pattern
signal
bit
ignition
Prior art date
Application number
PCT/JP2000/005378
Other languages
English (en)
Japanese (ja)
Inventor
Manabu Sunami
Original Assignee
Mitsubishi Denki Kabushiki Kaisha
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Denki Kabushiki Kaisha filed Critical Mitsubishi Denki Kabushiki Kaisha
Priority to PCT/JP2000/005378 priority Critical patent/WO2002014119A1/fr
Publication of WO2002014119A1 publication Critical patent/WO2002014119A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/01—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
    • B60R21/017—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents including arrangements for providing electric power to safety arrangements or their actuating means, e.g. to pyrotechnic fuses or electro-mechanic valves
    • B60R21/0173—Diagnostic or recording means therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/33—Arrangements for non-electric triggering of inflation

Definitions

  • the present invention relates to an airbag system for transmitting a normal signal and an ignition signal between a side ECU and a main ECU through a bit panel.
  • airbag systems on both sides of a vehicle are equipped with a side impact sensor and a side ECU, and exchange signals with a main ECU located near the driver's seat to ignite the airbag.
  • a signal is sent.
  • a normal signal is transmitted from the side ECU to the main ECU in a bit pattern of 8 bits + parity bit.
  • a side impact sensor detects a shock to the vehicle, and this detection signal is transmitted from the side ECU to the main ECU, and it is determined whether or not the side ECU should ignite the side airbag.
  • an ignition signal is transmitted to the side ECU, and the squib of the side airbag is ignited by a signal from the side ECU.
  • the normal signal and the ignition signal are composed of a 9-bit pattern of 8 bits + parity bit as shown in FIG. 1, and these patterns are only one type. It is.
  • the ignition signal sent from the main ECU can be changed from a regular pattern to one bit. If there is an error, the side ECU will not be able to detect the ignition signal, and there will be a problem in that the ignition timing will be delayed and the airbag will not operate properly during repeated detection operations.
  • the present invention has been made to solve the above-described problem, and has a plurality of types of ignition signal patterns, so that a slight error pattern can be determined as an ignition signal to perform an ignition operation.
  • the purpose is to obtain an airbag system. Disclosure of the invention
  • An air bag system stores a regular ignition signal pattern and an ignition signal pattern having a 1-bit error with respect to the regular ignition signal pattern in a storage means of the side ECU, and stores the same in the storage means.
  • the squib is ignited when the stored ignition signal pattern matches the ignition signal pattern from the main ECU.
  • the bit pattern of the ignition signal pattern is 9 bits of 8 bits + parity bit, and the ignition signal pattern of the 1-bit error is 9 patterns It is.
  • a plurality of types of normal signal patterns whose normal signal patterns are different by two bits each correspond to a vehicle type.
  • a normal signal pattern specific to the vehicle type is output from the ECU for the side, and the normal ECU stores the normal signal pattern from the ECU for the side in the storage means. By comparing the obtained normal signal pattern, it is determined whether or not the ECU is a side ECU corresponding to the vehicle type.
  • FIG. 1 is a diagram showing a normal signal pattern and an ignition signal pattern of a conventional air paging system.
  • FIG. 2 is a block diagram of an airbag system according to Embodiment 1 of the present invention.
  • FIG. 3 is an ignition signal pattern diagram of the first embodiment.
  • FIG. 4 is a flowchart showing the operation of the airbag system according to the first embodiment.
  • FIG. 5 is a normal signal pattern diagram according to the second embodiment. BEST MODE FOR CARRYING OUT THE INVENTION
  • FIG. 2 is a block diagram of the airbag system according to Embodiment 1 of the present invention
  • FIG. 3 is a pattern diagram of a normal signal and an ignition signal
  • FIG. 4 is a flowchart showing an operation of the airbag system.
  • reference numeral 1 denotes a side ECU, which is provided with a microcomputer 2, a left squib 3, a right squib 4, a voltage regulator 5, and an acceleration switch 6.
  • a DC power supply 7 is connected to the voltage regulator 5 to supply low-voltage power to the microcomputer 2 and the squibs 3 and 4.
  • Air bags 8 and 9 are connected to the squibs 3 and 4, respectively.
  • a side impact sensor 10 is connected to the microcomputer 2.
  • Reference numeral 1 denotes a main ECU, which exchanges signals with the microcomputer 2 of the side ECU 1.
  • the normal signal Q1 from the microcomputer 2 of the side ECU 1 is transmitted in the form of a 9-bit pattern consisting of 8 bits of "10111001" and a parity bit of "0". Sending in.
  • a detection signal Q 2 is transmitted from the microcomputer 2 of the side ECU 1 to the main ECU 11, and the main ECU 1 If 1 determines that the airbags 8, 9 should be ignited, an ignition signal Q3 is sent from the main ECU 11 to the side ECU 1.
  • This ignition signal Q3 is normally transmitted by communication of 8 bits of "010111010" and a 9-bit pattern with a "1" knowledge bit. .
  • this data is determined by the microcomputer 2 of the side ECU 1 to be the ignition signal Q3, a signal is sent to the squibs 3 and 4 to ignite and the airbags 8 and 9 are activated.
  • the ECU 1 for the side will judge that it is not an ignition signal, and the ignition timing may be delayed before repeating the judgment operation several times.
  • a slight error is determined to be an ignition signal as described below to eliminate timing delay and ensure safety.
  • nine 1-bit error patterns (a) to (i) are created and stored in the ROM (storage means) 2 a of the microcomputer 2. That is, for example, in the pattern of (a), the first bit becomes 0 ⁇ 1, in the pattern of (b), the second bit becomes 10, and so on in (c). Bit is 01, the fourth bit is 10 in (d), the fifth bit is 1-0 in (e), and the sixth bit is 0 in (: f). 1, the seventh bit is 10 in (g), the eighth bit is 01 in (h), and the parity bit is 10 in (i). It's a night.
  • step ST 1 when the ignition signal Q 3 is input from the main ECU 11 to the microcomputer 2 (step ST 1), it is determined whether or not the pattern matches the pattern stored in the ROM of the microcomputer 11. (Step ST 2), and if they match, a signal is sent to the squibs 3 and 4 to ignite (Step ST 3), the air bags 8 and 9 are activated, and if they do not match, it is determined that there is no ignition signal. It is turned off (step ST 4).
  • FIG. 5 is a normal signal pattern diagram according to the second embodiment.
  • the normal signal Q1 always has the same pattern even if the type of vehicle is different.
  • the eight bits of “101111001” and the parity bit of “0” are used.
  • 9-bit pattern (same as before).
  • the airbag system is necessarily different, so a different side ECU is used.
  • the normal signal pattern is the same, so that there is a possibility that the error may not be noticed. In such a case, the side airbag system may cause malfunction such as ignition delay.
  • the normal signal path is different for each vehicle type.
  • the two-bit change pattern (a) in which the first and second normal signal patterns of “101 1 1 0 0 1“ + ”0” are changed The two-bit change pattern of (b) with the fourth change, the two-bit change pattern of (c) with the fifth and sixth changes, and any other two-bit change pattern are stored in the main ECU 11 Store it in storage means.
  • a normal signal pattern is determined for each vehicle type, for example, the pattern of (a) is an X car, the pattern of (b) is a Y car, and the pattern of (c) is a Z car.
  • the ECU 1 for the side outputs a normal signal pattern specific to the vehicle type. Then, when the power is turned on with the ECU1 for side mounted, the normal signal pattern from the ECU1 for side is judged by the main ECU1'1 and whether or not it is of the model concerned Is determined. As described above, in the second embodiment, if the ECU 1 for the side in which the pattern (a) is stored by mistake is attached to the Y car, the ECU for the side immediately becomes the wrong ECU. This can be determined by the main ECU 11 and the inconveniences described above can be prevented. Industrial applicability
  • the airbag system according to the present invention is suitable for an airbag system that transmits a normal signal and an ignition signal in a bit pattern between a side ECU and a main ECU.
  • the bit pattern of the ignition signal pattern is 8 bits + 9 bits of parity bit, and the ignition signal pattern of 1 bit error is 9 patterns.
  • a plurality of normal signal patterns with different normal signal patterns by two bits are stored in the storage means of the main ECU corresponding to each vehicle type, and the side ECU outputs a normal signal pattern specific to the vehicle type.
  • the main ECU compares the normal signal pattern from the ECU for the side with the normal signal pattern stored in the storage means to determine whether or not the ECU is a side ECU for the vehicle type.
  • a plurality of types of normal signal patterns having different normal signal patterns by two bits are stored in the storage means of the main ECU, and are stored by the side ECU.
  • the main ECU is configured to output a normal signal pattern, and the main ECU determines a normal signal pattern from the side ECU and determines whether the ECU is a side ECU of the model. 3.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Air Bags (AREA)

Abstract

Cette invention concerne un motif de signal d'allumage contenant un bit erroné, différent du bit correct d'un motif d'allumage normal, qui est stocké dans un support de stockage d'une unité de commande électronique (ECU) latérale (1). Lorsque le motif du signal d'allumage dans le dispositif de stockage concorde avec les signal d'allumage provenant d'une unité de commande électronique principale (11), une amorce est allumée. Il est possible de traiter facilement le signal par évaluation du motif renfermant un bit erroné, ce qui évite de devoir faire intervenir un circuit complexe de traitement du signal.
PCT/JP2000/005378 2000-08-10 2000-08-10 Systeme de coussin gonflable WO2002014119A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2000/005378 WO2002014119A1 (fr) 2000-08-10 2000-08-10 Systeme de coussin gonflable

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2000/005378 WO2002014119A1 (fr) 2000-08-10 2000-08-10 Systeme de coussin gonflable

Publications (1)

Publication Number Publication Date
WO2002014119A1 true WO2002014119A1 (fr) 2002-02-21

Family

ID=11736346

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2000/005378 WO2002014119A1 (fr) 2000-08-10 2000-08-10 Systeme de coussin gonflable

Country Status (1)

Country Link
WO (1) WO2002014119A1 (fr)

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05294207A (ja) * 1992-02-18 1993-11-09 Hitachi Ltd エアバッグ装置及び作動方法
WO1997021565A1 (fr) * 1995-12-12 1997-06-19 Siemens Aktiengesellschaft Systeme pour declencher un element de retenue dans une automobile
JPH09247139A (ja) * 1996-03-01 1997-09-19 Canon Inc パターン検出装置
US5760489A (en) * 1996-10-04 1998-06-02 Motorola, Inc. Method for transmitting signals between a microprocessor and an interface circuit
JPH10154926A (ja) * 1996-11-22 1998-06-09 Fujitsu Ten Ltd シリアル信号発生装置
JPH10194075A (ja) * 1997-01-06 1998-07-28 Nec Home Electron Ltd エアバッグ用起爆装置
WO1998043853A1 (fr) * 1997-03-31 1998-10-08 Nissan Motor Co., Ltd. Appareil de commande destine a des dispositifs de securite de retenue de passagers
JPH1159323A (ja) * 1997-08-26 1999-03-02 Toyota Motor Corp 乗員保護装置
US5916290A (en) * 1994-05-26 1999-06-29 Nippondenso Co., Ltd. Airbag device having combined fault diagnosis and type signaling indicator

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05294207A (ja) * 1992-02-18 1993-11-09 Hitachi Ltd エアバッグ装置及び作動方法
US5916290A (en) * 1994-05-26 1999-06-29 Nippondenso Co., Ltd. Airbag device having combined fault diagnosis and type signaling indicator
WO1997021565A1 (fr) * 1995-12-12 1997-06-19 Siemens Aktiengesellschaft Systeme pour declencher un element de retenue dans une automobile
JPH09247139A (ja) * 1996-03-01 1997-09-19 Canon Inc パターン検出装置
US5760489A (en) * 1996-10-04 1998-06-02 Motorola, Inc. Method for transmitting signals between a microprocessor and an interface circuit
JPH10154926A (ja) * 1996-11-22 1998-06-09 Fujitsu Ten Ltd シリアル信号発生装置
JPH10194075A (ja) * 1997-01-06 1998-07-28 Nec Home Electron Ltd エアバッグ用起爆装置
WO1998043853A1 (fr) * 1997-03-31 1998-10-08 Nissan Motor Co., Ltd. Appareil de commande destine a des dispositifs de securite de retenue de passagers
JPH1159323A (ja) * 1997-08-26 1999-03-02 Toyota Motor Corp 乗員保護装置

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