DE102004042600A1 - Device and method for controlling an airbag system - Google Patents

Device and method for controlling an airbag system

Info

Publication number
DE102004042600A1
DE102004042600A1 DE102004042600A DE102004042600A DE102004042600A1 DE 102004042600 A1 DE102004042600 A1 DE 102004042600A1 DE 102004042600 A DE102004042600 A DE 102004042600A DE 102004042600 A DE102004042600 A DE 102004042600A DE 102004042600 A1 DE102004042600 A1 DE 102004042600A1
Authority
DE
Germany
Prior art keywords
stage
airbag
delay time
information
vehicle
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
DE102004042600A
Other languages
German (de)
Inventor
Timur von Dipl.-Ing. Drach
Werner Dipl.-Ing. Steiner
Helmut Dipl.-Ing. Steurer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Conti Temic Microelectronic GmbH
Original Assignee
Conti Temic Microelectronic GmbH
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 Conti Temic Microelectronic GmbH filed Critical Conti Temic Microelectronic GmbH
Priority to DE102004042600A priority Critical patent/DE102004042600A1/en
Publication of DE102004042600A1 publication Critical patent/DE102004042600A1/en
Application status is Withdrawn legal-status Critical

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60RVEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/01Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
    • B60R21/013Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents including means for detecting collisions, impending collisions or roll-over
    • B60R21/0136Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents including means for detecting collisions, impending collisions or roll-over responsive to actual contact with an obstacle, e.g. to vehicle deformation, bumper displacement or bumper velocity relative to the vehicle
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60RVEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/01Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
    • B60R21/013Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents including means for detecting collisions, impending collisions or roll-over
    • B60R21/0132Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents including means for detecting collisions, impending collisions or roll-over responsive to vehicle motion parameters, e.g. to vehicle longitudinal or transversal deceleration or speed value
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60RVEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/01Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
    • B60R21/015Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents including means for detecting the presence or position of passengers, passenger seats or child seats, and the related safety parameters therefor, e.g. speed or timing of airbag inflation in relation to occupant position or seat belt use
    • B60R21/01512Passenger detection systems

Abstract

The invention relates to a device (1) for controlling an airbag system of a vehicle, wherein the airbag system has at least one airbag with a first stage (5.1) and at least one second stage (5.2) and the device (1) is formed, depending on at least one Sensor signal (2) first the first stage (5.1) and after a delay time (5.3) to control the at least one second stage (5.2) of the airbag. The device (1) is also designed to determine the delay time (5.3) for controlling the at least one second stage (5.2) of the airbag as a function of intrinsic speed information (6) of the vehicle.

Description

  • The The invention relates to a device for controlling an airbag system according to the generic term of claim 1 and a corresponding method according to claim 8th.
  • Out WO 2004/033260 is a device for controlling an airbag system known in which a second stage of an airbag in dependence from a shortcut at least one of an acceleration signal derived criterion and an impact velocity is controlled. This gives the device the impact speed of a pre-crash sensor, so the relative speed between a vehicle and an obstacle. The at least one criterion is, for example, a first trip time for the first stage of the airbag. Due to the impact speed, the tripping time for the second Airbag stage exactly in terms of optimally to the crash course adapted triggering of the airbag. For However, this device is a complex pre-crash sensor required in the vehicle.
  • task The present invention is therefore an apparatus and a To propose method for controlling an airbag system, the no require complex pre-crash systems or sensors and nevertheless, as much as possible an activation of the vehicle adapted to the respective accident situation Airbag system allow.
  • These The object is achieved by a device for controlling an airbag system with the features of claim 1 and by a corresponding method solved with the features of claim 8. Preferred embodiments The invention will become apparent from the dependent claims.
  • One essential idea of the invention is the tripping time of a second stage of an airbag as a function of airspeed to realize a vehicle. This is no time-consuming pre-crash sensor for the Impact speed required but it can be a speed information used by already existing in a vehicle Measuring means of the airspeed is generated, such as from Wheel sensors or a tachometer. It has been shown that one Such in almost every vehicle existing airspeed information for the exact determination of the tripping time with regard to one possible good adaptation of the triggering the second airbag stage to a crash course perfectly sufficient is. As a result, the invention can also be used in vehicles, the no pre-crash sensor systems exhibit.
  • The The invention now relates to a device for controlling an airbag system a vehicle, wherein the airbag system at least one airbag having a first stage and at least a second stage and the device is designed, depending on at least one sensor signal first the first stage and after a delay the minimum to control a second stage of the airbag. The device is further trained, the delay time for controlling the at least one second stage of the airbag depending on to determine an intrinsic speed information of the vehicle.
  • Especially If the device is designed, the delay time by a logical shortcut an airspeed information of the vehicle and a seat occupancy information determine. This is an even better adjustment of the triggering time the at least one second airbag stage in situations possible at for example, where a person is not wearing a belt, unfavorable in terms of the protective effect of an airbag sits or a child seat on a vehicle seat is located.
  • For example For example, the device may be configured to set the delay time such that no activation of the at least one second stage of the airbag occurs when the seat occupancy information is a predetermined value signaled. This predetermined value can be, for example, information about that be that e.g. a child seat is located on the vehicle seat and therefore triggering the at least one second airbag stage should not take place.
  • The Alternatively, however, the device can also be designed, the delay time according to a given function depends from the airspeed information when the seat occupancy information signaled a predetermined value. This is advantageous for cases in which the seat occupancy information For example, signaling that a person is in the seat is located, but not in an optimal position regarding of the usual Airbag is located. By setting the delay time according to a certain given function, this person can do better than with conventional independently airbag deployment algorithms operating from seat occupancy information protected become.
  • Finally, the device can also be designed in a further alternative embodiment, the delay time as a function of the egg gengeschwindigkeitsinformation to determine. Here, therefore, the delay time is determined independently of any seat occupancy information or other information except the vehicle's own speed. There is therefore no seat occupancy information for the determination of the delay of the triggering of the at least one second airbag stage required, as may be the case for example in the driver's seat, since this must always be occupied in a moving vehicle.
  • The Function of the airspeed information, for example a stepped or have linear course. A non-linear course would also be conceivable the function, but usually a larger amount of computation to determine the delay time based on the airspeed information required.
  • The Airspeed information is provided by at least one measuring means to disposal which may be a wheel sensor or a tachometer. These Measuring equipment is available in almost every vehicle, so the Airspeed information in a cost effective manner while avoiding more elaborate for For this purpose provided measuring means can be obtained.
  • The The invention further relates to a method for controlling an airbag system a vehicle, wherein the airbag system with at least one airbag a first stage and at least a second stage, and dependent of at least one sensor signal first the first stage and after a delay time the at least one second stage of the airbag is activated. The Delay time to Control of the at least one second stage of the airbag is dependent on this determined by an intrinsic speed information of the vehicle.
  • The Delay Time can for example by a logical combination of airspeed information the vehicle and a seat occupancy information are determined an optimally adapted triggering to effect the at least one second airbag stage.
  • The Delay Time can also be set so that no control of at least a second stage of the airbag occurs when the seat occupancy information signaled a predetermined value. This is for example then advantageous when a child seat or luggage is on a vehicle seat and a trigger the at least one second airbag stage is not required.
  • alternative can the delay time according to a given function depends be set from the airspeed information, if the seat occupancy information signals a predetermined value.
  • The Delay Time can be determined as a function of the airspeed information be, by at least one measuring means of the airspeed a vehicle is delivered.
  • in this connection For example, the function of the airspeed information may be stepwise or linear Have history with as possible low computational effort the delay time to determine from the airspeed information.
  • Further Advantages and applications The present invention will become apparent from the following description in conjunction with the embodiments illustrated in the drawings.
  • In the description, in the claims, in the abstract and in the drawings are those in the listed below List of reference symbols used terms and associated reference numerals used.
  • The Drawings show in:
  • 1 a block diagram of an embodiment of erfindungemäßen device for controlling an airbag system of a vehicle; and
  • 2 a diagram showing the course of two exemplary functions for determining the delay time from the airspeed information of a motor vehicle.
  • In 1 is a device 1 for controlling an airbag system of a vehicle, such as a passenger car (PKW) shown. The device 1 includes acceleration sensors for signal acquisition 2 which, in the event of a collision of the vehicle with an obstacle, emit signals to trigger restraints such as airbags. Furthermore, a control unit which has a powerful μP, for example, for the airbag system with an implementing algorithm for signal processing, in particular the signals of the acceleration sensors 2 and for generating airbag deployment signals.
  • At least one of the device 1 controlled airbags includes several, in particular two airbag stages, as in 1 by a first and a second airbag stage 5.1 respectively. 5.2 implied is. These stages mean that the airbag receives, for each stage from the controller, a trigger signal that "fires" a particular stage, in the example shown receives a first airbag stage 5.1 a first trigger signal 5.1.1 and a second airbag stage 5.2 a second trigger signal 5.2.1 , The stages are usually realized by multi-stage, eg two-stage gas generators of an airbag. By such multi-stage gas generators, the deployment of an airbag can be controlled more accurately than in single-stage gas generators. As a result, the protective effect of the airbag can be better adapted to the course of an accident.
  • The device 1 also includes measuring equipment 6 for the vehicle's own speed and a seat occupancy detection circuit 4 , The measuring means comprise a wheel sensor 6.1 and a speedometer 6.2 , both of which measure the speed of the vehicle (airspeed, not the relative speed as in a pre-crash sensor). The seat occupancy detection circuit 4 detects the occupancy of a seat, for example, the passenger seat. In this case, as seat occupancy information, it can not only provide occupancy of the seat, but also information about how the seat is occupied. This allows a more targeted setting of a delay time 5.3 of the second trigger signal 5.2.1 the second airbag stage 5.2 be made. For example, to the controller 3 the information transmitted that the front passenger seat is occupied, but the person in the seat is "out of position", so is not completely in the seat, the in the control unit 3 implemented trigger algorithm the delay time 5.3 adjust accordingly, for example, such that the second airbag stage 5.2 is ignited earlier than in a fully seated person to avoid serious injury.
  • The delay time 5.3 is in the control unit 3 depending on the supplied signals and information. For example, it may depend on the supplied airspeed information according to an in 2 shown function 3.1 be determined. The function 3.1 is in 2 as a stepped function 3.1.1 and as a linear function 3.1.2 shown. For both functions 3.1.1 and 3.1.2 takes the deceleration time shown on the ordinate with increasing speed of the vehicle as shown on the abscissa, in the case of the function 3.1.1 leaps and bounds in the case of function 3.1.2 steadily. The implementation of the function 3.1 in the control unit 3 can be done for example in the form of a table in which different speeds and the associated delay times are stored. Also conceivable is the realization in the form of a calculation of the delay time from the speed, which can be found in both functional examples 3.1.1 and 3.1.2 proves to be feasible with relatively little technical effort. Of course, in such a calculation nor the seat occupancy information flow, for example by the delay time is set to "infinity" in a non-existent seat occupancy, so that the second airbag stage is not ignited or activated.
  • 1
    contraption for controlling an airbag system of a vehicle
    2
    accelerometers
    3
    Control unit for the airbag system to implement with one
    algorithm for signal processing and generation of
    Trip signals of the first and second airbag stage 5.1 respectively. 5.2
    3.1
    function the delay time depending on of the
    Airspeed information of the vehicle
    3.1.1
    step-shaped function
    3.1.2
    linear function
    4
    Seat occupancy detection circuit
    5.1
    first airbag stage
    5.1.1
    first triggering signal for the first airbag stage 5.1
    5.2
    second airbag stage
    5.2.1
    second trigger signal for the second airbag stage 5.2
    5.3
    Delay time between first and second trip signal 5.1.1
    and 5.2.1
    6
    measuring Equipment for the Airspeed of the vehicle
    6.1
    wheel sensor
    6.2
    speedometer
    7
    logical shortcut the airspeed information of the
    vehicle and seat occupancy information

Claims (13)

  1. Contraption ( 1 ) for controlling an airbag system of a vehicle, wherein the airbag system comprises at least one airbag with a first stage ( 5.1 ) and at least a second stage ( 5.2 ) and the device ( 1 ) is formed, depending on at least one sensor signal ( 2 ) first the first stage ( 5.1 ) and after a delay time ( 5.3 ) the at least one second stage ( 5.2 ) of the airbag, characterized in that the device ( 1 ) is further configured, the delay time ( 5.3 ) for controlling the at least one second stage ( 5.2 ) of the airbag depending on an airspeed information ( 6 ) of the vehicle.
  2. Device according to Claim 1, characterized in that it is designed to reduce the delay time ( 5.3 ) by a logical link ( 7 ) an airspeed information ( 6 ) of the vehicle and a seat occupancy information ( 4 ).
  3. Device according to Claim 2, characterized in that it is designed to reduce the delay time ( 5.3 ) such that no activation of the at least one second stage ( 5.2 ) of the airbag takes place when the seat occupancy information ( 4 ) signals a predetermined value.
  4. Device according to Claim 2, characterized in that it is designed to reduce the delay time ( 5.3 ) according to a predetermined function ( 3.1.1 . 3.1.2 ) depending on the airspeed information ( 6 ) when the seat occupancy information ( 4 ) signals a predetermined value.
  5. Device according to Claim 1 or 2, characterized in that it is designed to reduce the delay time ( 5.3 ) as a function of the airspeed information ( 3.1.1 . 3.1.2 ).
  6. Device according to claim 5, characterized in that the function of the airspeed information comprises a stepped ( 3.1.1 ) or linear course ( 3.1.2 ) having.
  7. Device according to one of the preceding claims, characterized in that the intrinsic speed information of at least one measuring means ( 6 ) the intrinsic speed of a vehicle is provided, wherein the at least one measuring means is a wheel sensor ( 6.1 ) or a speedometer ( 6.2 ).
  8. Method for controlling an airbag system of a vehicle, wherein the airbag system comprises at least one airbag with a first stage ( 5.1 ) and at least a second stage ( 5.2 ) and dependent on at least one sensor signal ( 2 ) first the first stage ( 5.1 ) and after a delay time ( 5.3 ) the at least one second stage ( 5.2 ) of the airbag, characterized in that the delay time ( 5.3 ) for controlling the at least one second stage ( 5.2 ) of the airbag depending on an airspeed information ( 6 ) of the vehicle is determined.
  9. Method according to Claim 8, characterized in that the delay time ( 5.3 ) by a logical link ( 7 ) an airspeed information ( 6 ) of the vehicle and a seat occupancy information ( 4 ) is determined.
  10. Method according to Claim 9, characterized in that the delay time ( 5.3 ) is set such that no activation of the at least one second stage ( 5.2 ) of the airbag takes place when the seat occupancy information ( 4 ) signals a predetermined value.
  11. Method according to Claim 9, characterized in that the delay time ( 5.3 ) according to a predetermined function ( 3.1.1 . 3.1.2 ) depending on the airspeed information ( 6 ) is set when the seat occupancy information ( 4 ) signals a predetermined value.
  12. Method according to claim 8 or 9, characterized in that the delay time ( 5.3 ) as a function of the airspeed information ( 3.1.1 . 3.1.2 ) is determined.
  13. Method according to claim 12, characterized in that the function of the speed information is a stepped ( 3.1.1 ) or linear course ( 3.1.2 ) having.
DE102004042600A 2004-09-03 2004-09-03 Device and method for controlling an airbag system Withdrawn DE102004042600A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE102004042600A DE102004042600A1 (en) 2004-09-03 2004-09-03 Device and method for controlling an airbag system

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102004042600A DE102004042600A1 (en) 2004-09-03 2004-09-03 Device and method for controlling an airbag system
PCT/DE2005/001365 WO2006024255A1 (en) 2004-09-03 2005-08-03 Device and method for triggering an airbag system
DE112005001839T DE112005001839A5 (en) 2004-09-03 2005-08-03 Device and method for controlling an airbag system

Publications (1)

Publication Number Publication Date
DE102004042600A1 true DE102004042600A1 (en) 2006-03-09

Family

ID=35276574

Family Applications (2)

Application Number Title Priority Date Filing Date
DE102004042600A Withdrawn DE102004042600A1 (en) 2004-09-03 2004-09-03 Device and method for controlling an airbag system
DE112005001839T Withdrawn DE112005001839A5 (en) 2004-09-03 2005-08-03 Device and method for controlling an airbag system

Family Applications After (1)

Application Number Title Priority Date Filing Date
DE112005001839T Withdrawn DE112005001839A5 (en) 2004-09-03 2005-08-03 Device and method for controlling an airbag system

Country Status (2)

Country Link
DE (2) DE102004042600A1 (en)
WO (1) WO2006024255A1 (en)

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4498258T1 (en) * 1993-10-29 1996-01-25 Bosch Gmbh Robert Airbag system for a motor vehicle
DE19647660A1 (en) * 1996-11-19 1998-05-20 Daimler Benz Ag Triggering device for occupant restraint systems in a vehicle
DE19740020A1 (en) * 1997-09-11 1999-03-25 Siemens Ag Apparatus and method for controlling a gas bag arrangement in a motor vehicle
DE19816989A1 (en) * 1998-04-17 1999-11-04 Daimler Chrysler Ag Method for triggering a two-stage airbag gas generator
DE19855077A1 (en) * 1998-11-28 2000-06-08 Daimler Chrysler Ag Multistage gas generator
DE19932520A1 (en) * 1999-07-12 2001-02-01 Hirschmann Austria Gmbh Rankwe An apparatus for controlling a security system
DE69611314T2 (en) * 1995-03-22 2001-08-09 Autoliv Asp Inc Multi-stage airbag inflation system
DE10059426A1 (en) * 2000-11-30 2002-06-13 Bosch Gmbh Robert Process for triggering restraining means in a motor vehicle
DE10116926A1 (en) * 2001-04-05 2002-10-17 Daimler Chrysler Ag Control system for vehicle airbag gas generator, employs sensor to assess collision and deliver alternating control signal, which matches bag filling to severity of impact
DE10246055A1 (en) * 2002-10-02 2004-04-15 Robert Bosch Gmbh Protection device for a vehicle occupant
DE10304142A1 (en) * 2003-02-03 2004-08-05 Robert Bosch Gmbh Device and method for controlling a gas generator for inflating an airbag

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10246800A1 (en) * 2002-10-08 2004-04-22 Robert Bosch Gmbh Device for controlling restraining system in a vehicle, controls second airbag stage depending on combination of at least one derived criterion, impact speed that device receives from pre-crash sensing arrangement

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4498258T1 (en) * 1993-10-29 1996-01-25 Bosch Gmbh Robert Airbag system for a motor vehicle
DE69611314T2 (en) * 1995-03-22 2001-08-09 Autoliv Asp Inc Multi-stage airbag inflation system
DE19647660A1 (en) * 1996-11-19 1998-05-20 Daimler Benz Ag Triggering device for occupant restraint systems in a vehicle
DE19740020A1 (en) * 1997-09-11 1999-03-25 Siemens Ag Apparatus and method for controlling a gas bag arrangement in a motor vehicle
DE19816989A1 (en) * 1998-04-17 1999-11-04 Daimler Chrysler Ag Method for triggering a two-stage airbag gas generator
DE19855077A1 (en) * 1998-11-28 2000-06-08 Daimler Chrysler Ag Multistage gas generator
DE19932520A1 (en) * 1999-07-12 2001-02-01 Hirschmann Austria Gmbh Rankwe An apparatus for controlling a security system
DE10059426A1 (en) * 2000-11-30 2002-06-13 Bosch Gmbh Robert Process for triggering restraining means in a motor vehicle
DE10116926A1 (en) * 2001-04-05 2002-10-17 Daimler Chrysler Ag Control system for vehicle airbag gas generator, employs sensor to assess collision and deliver alternating control signal, which matches bag filling to severity of impact
DE10246055A1 (en) * 2002-10-02 2004-04-15 Robert Bosch Gmbh Protection device for a vehicle occupant
DE10304142A1 (en) * 2003-02-03 2004-08-05 Robert Bosch Gmbh Device and method for controlling a gas generator for inflating an airbag

Also Published As

Publication number Publication date
DE112005001839A5 (en) 2007-05-31
WO2006024255A1 (en) 2006-03-09

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