WO1997023369A1 - Airbagsystem - Google Patents
Airbagsystem Download PDFInfo
- Publication number
- WO1997023369A1 WO1997023369A1 PCT/DE1996/002376 DE9602376W WO9723369A1 WO 1997023369 A1 WO1997023369 A1 WO 1997023369A1 DE 9602376 W DE9602376 W DE 9602376W WO 9723369 A1 WO9723369 A1 WO 9723369A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- airbag system
- connection
- control
- switching
- port
- Prior art date
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
Definitions
- Airbag systems are, for example, from the magazine 1141 Ingenieurs de 1'Automobile (1982) No. 6, page 69 ff. From DE 28 51 333 AI of the applicant, an airbag system is also known in which two independently controllable switching means are provided in an ignition circuit. An ignition pill arranged in the ignition circuit is only supplied with an ignition current if both switching means are controlled to be conductive.
- the present invention aims to further improve the airbag system mentioned in the last-mentioned publication with the aim of increasing operational safety by avoiding false tripping. This is particularly important in modern
- microcomputers tend to have uncontrolled states. These can be accompanied by unwanted control impulses for the final stages of the airbag system, which create the risk of the airbag being triggered incorrectly.
- the invention offers a solution to avoid this risk.
- FIG. 1 shows the circuit diagram of an airbag system
- FIG. 2 shows a flow diagram. 7/23369 PO7DE96 / 02376
- FIG. 1 shows the circuit diagram of an airbag system 1.
- This comprises at least one acceleration sensor 2, which is connected to a control unit 3.
- the control unit 3 is connected to assemblies 9a, 9b, which will be explained in more detail below.
- the airbag system 1 comprises at least one ignition circuit la for actuating an ignition pill 6.
- the ignition pill 6 is operatively connected to an airbag 7.
- two switching elements 5, 16 are further arranged which enclose the ignition pill 6 between them.
- a commercially available n-channel field effect transistor of higher power with a SOT 223 housing is particularly suitable as switching element 5.
- a commercially available p-channel field effect transistor of higher power with an SOT 223 housing is advantageously used as the switching element 16.
- An energy source 8 usually the battery of the vehicle, is provided for the power supply of the airbag system 1.
- An energy source 8 usually the battery of the vehicle, is provided for the power supply of the airbag system 1.
- the assembly 9a consists of a microcomputer.
- the commercially available type HC 11 E 20 is suitable as a microcomputer, for example, which, in addition to the usual other components, has in particular a serial interface 17 and, in a subassembly 18, a plurality of ports 18/1, 18/2, 18/3, 18/4.
- the assembly 9b comprises a serial interface 10, a decoder 11, a watchdog circuit 12, a reset circuit 13, logic
- Logic circuits 14, 15, and the switching element 16 assigned to the ignition circuit la The output terminal of a logic element 4, which has two input terminals, is connected to the control terminal of the switching element 5. One of the input connections is connected to the assembly 9a, 9b.
- the assemblies 9a, 9b are connected to one another via a plurality of connecting lines.
- Line 10/17 thus connects serial interfaces 10, 17.
- Port 18/1 is connected via line 14/18 to an input connection of logic element 14, the output connection of which is connected to the control connection of switching element 16.
- Port 18/2 is connected to watchdog circuit 12 via line 12/18.
- Port 18/3 is connected to reset circuit 13 via line 13/18.
- One input connection each of the logic logic elements 144, 15 are connected both to one another and to the reset circuit 12.
- a second input connection of the logic element 15 and a third input connection of the logic element 14 are each connected to the decoder 11.
- the switching elements 5, 16 of the ignition circuit 1 a are blocked by a reset signal from the reset circuit 13. In this state, activation of the squib 6 is excluded. Removing the reset state brings the airbag system into the normal state, in which the assemblies 9a, 9b for one
- Control of the switching elements 5, 16 are prepared. See step 21 in the flow chart according to FIG. 2.
- the switching elements 5, 16 are released for a future ignition process in such a way that an input connection of the logic element 14 via the port 18/1 and the line 14/18 with a (Static) control signal and the link 4 via the decoder 11, the link 15 and the line 4/15 with a dynamic control signal.
- both switching elements 5, 16 are activated in order to close the ignition circuit. For this purpose, a static one is created via port 18/4 of subassembly 18 Signal to the second input terminal of the
- Logic element 4 placed, with the result that a control signal is applied to the control connection of the switching element 4 via its output connection. As a result, the switching element 4 is controlled in the conductive state.
- a control command in the form of a digital signal is transmitted from the serial interface 17 to the serial interface 10 via the line 10/17.
- This signal is decoded in decoder 11 and fed to the third input terminal of logic element 14.
- a control signal is then applied to the control connection of the switching element 16 via the output connection of the logic element 14, which has the consequence that the switching element 16 switches through and closes the ignition circuit 1 a.
- the inventive solution provides that each of the switching elements 5, 16 must be controlled in two different ways in order to get into the conductive state. On the one hand by a signal which inevitably causes a certain switching state due to the hardware wiring.
- a coded software command that is only generated in a strictly defined functional area of the airbag system.
- the system is controlled by three main functions, which are processed cyclically one after the other. These three main functions are:
- the cycle time is advantageously 500 microseconds to about 1 millisecond.
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/091,718 US6097284A (en) | 1995-12-21 | 1996-12-11 | Airbag system |
EP96946067A EP0868328A1 (de) | 1995-12-21 | 1996-12-11 | Airbagsystem |
AU18693/97A AU1869397A (en) | 1995-12-21 | 1996-12-11 | Airbag system |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19547840 | 1995-12-21 | ||
DE19547840.1 | 1995-12-21 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1997023369A1 true WO1997023369A1 (de) | 1997-07-03 |
Family
ID=7780818
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE1996/002376 WO1997023369A1 (de) | 1995-12-21 | 1996-12-11 | Airbagsystem |
Country Status (5)
Country | Link |
---|---|
US (1) | US6097284A (de) |
EP (1) | EP0868328A1 (de) |
AU (1) | AU1869397A (de) |
DE (1) | DE19651452C2 (de) |
WO (1) | WO1997023369A1 (de) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2333875A (en) * | 1998-01-29 | 1999-08-04 | Sagem Autoliv | Vehicle safety system switching arrangement |
WO1999050105A1 (de) * | 1998-03-28 | 1999-10-07 | Temic Telefunken Microelectronic Gmbh | Steuerverfahren und modul für insassenschutzsysteme mit sperrung einer verbindung vom bussystem zur insassenschutzeinrichtung, insbesondere in kraftfahrzeugen |
US6647886B2 (en) | 1998-01-29 | 2003-11-18 | Autoliv Development Ab | Vehicle system |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100517793B1 (ko) * | 2000-06-05 | 2005-10-04 | 지멘스 악티엔게젤샤프트 | 자동차내의 승객 보호 장치의 능동 소자 제어 장치 |
DE102004036291B4 (de) * | 2004-07-27 | 2008-11-06 | Conti Temic Microelectronic Gmbh | Schaltungsanordnung und Verfahren zum Steuern einer Sicherheitseinrichtung für ein Fahrzeug |
US9039038B2 (en) | 2010-06-02 | 2015-05-26 | Automotive Technologies International, Inc. | Steering wheel mounted aspirated airbag system |
US8801033B2 (en) * | 2010-06-02 | 2014-08-12 | Automotive Technologies International, Inc. | Airbag system |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0283737A1 (de) * | 1987-03-26 | 1988-09-28 | Siemens Aktiengesellschaft | Schaltungsanordnung zum Betätigen eines Schutzsystems |
DE4212337A1 (de) * | 1992-04-13 | 1993-10-14 | Bosch Gmbh Robert | Sicherheitsanlage für ein Fahrzeug |
DE4237404A1 (de) * | 1992-11-05 | 1994-05-11 | Base Ten Systems Electronics G | Seitenairbag-Auslösesteuerung |
DE19515190A1 (de) * | 1994-04-28 | 1995-11-02 | Nippon Denso Co | Fehlbetätigungs-Verhinderungseinrichtung für einen Rechner |
DE19547307A1 (de) * | 1995-07-07 | 1997-01-09 | Mitsubishi Electric Corp | Passagierschutzvorrichtung und zugehörige Betätigungsvorrichtung |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2851333A1 (de) * | 1978-11-28 | 1980-06-12 | Bosch Gmbh Robert | Pruefschaltung fuer die ausloesevorrichtung einer den schutz der insassen eines fahrzeugs waehrend eines unfalles dienenden sicherheitseinrichtung |
JP2853511B2 (ja) * | 1993-04-27 | 1999-02-03 | 三菱電機株式会社 | 乗員保護装置の故障診断装置 |
US5646454A (en) * | 1994-09-24 | 1997-07-08 | Robert Bosch Gmbh | Electronic safety device for vehicle occupants including a memory device for storing fault conditions and associated control commands |
JP3011092B2 (ja) * | 1995-06-12 | 2000-02-21 | 株式会社デンソー | 安全装置の起動装置 |
-
1996
- 1996-12-11 US US09/091,718 patent/US6097284A/en not_active Expired - Lifetime
- 1996-12-11 WO PCT/DE1996/002376 patent/WO1997023369A1/de not_active Application Discontinuation
- 1996-12-11 AU AU18693/97A patent/AU1869397A/en not_active Abandoned
- 1996-12-11 EP EP96946067A patent/EP0868328A1/de not_active Withdrawn
- 1996-12-11 DE DE19651452A patent/DE19651452C2/de not_active Expired - Lifetime
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0283737A1 (de) * | 1987-03-26 | 1988-09-28 | Siemens Aktiengesellschaft | Schaltungsanordnung zum Betätigen eines Schutzsystems |
DE4212337A1 (de) * | 1992-04-13 | 1993-10-14 | Bosch Gmbh Robert | Sicherheitsanlage für ein Fahrzeug |
DE4237404A1 (de) * | 1992-11-05 | 1994-05-11 | Base Ten Systems Electronics G | Seitenairbag-Auslösesteuerung |
DE19515190A1 (de) * | 1994-04-28 | 1995-11-02 | Nippon Denso Co | Fehlbetätigungs-Verhinderungseinrichtung für einen Rechner |
DE19547307A1 (de) * | 1995-07-07 | 1997-01-09 | Mitsubishi Electric Corp | Passagierschutzvorrichtung und zugehörige Betätigungsvorrichtung |
Non-Patent Citations (2)
Title |
---|
BERGFRIED D E ET AL: "ELECTRONIC CRASH SENSORS FOR RESTRAINT SYSTEMS", VERHICLE ELCTRONICS IN THE 90'S, DEARBORN, OCT. 15 - 17, 1990, no. -, 1 October 1990 (1990-10-01), INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS, pages 169 - 177, XP000223541 * |
HAERTL A ET AL: "AIRBAG SYSTEMS - THEIR PERMANENT MONITORING AND ITS MEANING TO THE USER", VERHICLE ELCTRONICS IN THE 90'S, DEARBORN, OCT. 15 - 17, 1990, no. -, 1 October 1990 (1990-10-01), INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS, pages 187 - 193, XP000223543 * |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2333875A (en) * | 1998-01-29 | 1999-08-04 | Sagem Autoliv | Vehicle safety system switching arrangement |
GB2333875B (en) * | 1998-01-29 | 2002-04-03 | Sagem Autoliv | Improvements in or relating to a vehicle safety system |
US6647886B2 (en) | 1998-01-29 | 2003-11-18 | Autoliv Development Ab | Vehicle system |
WO1999050105A1 (de) * | 1998-03-28 | 1999-10-07 | Temic Telefunken Microelectronic Gmbh | Steuerverfahren und modul für insassenschutzsysteme mit sperrung einer verbindung vom bussystem zur insassenschutzeinrichtung, insbesondere in kraftfahrzeugen |
AU739590B2 (en) * | 1998-03-28 | 2001-10-18 | Robert Bosch Gmbh | Control method and module for occupant protection systems with an action which blocks a connection from the bus system to the occupant protection device, especially in motor vehicles |
US6477456B1 (en) | 1998-03-28 | 2002-11-05 | Temic Telefunken Microelectronic Gmbh | Control method and module for occupant protection systems with an action to prevent premature triggering |
Also Published As
Publication number | Publication date |
---|---|
DE19651452C2 (de) | 2003-10-30 |
US6097284A (en) | 2000-08-01 |
AU1869397A (en) | 1997-07-17 |
DE19651452A1 (de) | 1997-06-26 |
EP0868328A1 (de) | 1998-10-07 |
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