WO2006003095A1 - Circuit de commande d'un moyen de protection de personnes dans un vehicule automobile - Google Patents

Circuit de commande d'un moyen de protection de personnes dans un vehicule automobile Download PDF

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Publication number
WO2006003095A1
WO2006003095A1 PCT/EP2005/052865 EP2005052865W WO2006003095A1 WO 2006003095 A1 WO2006003095 A1 WO 2006003095A1 EP 2005052865 W EP2005052865 W EP 2005052865W WO 2006003095 A1 WO2006003095 A1 WO 2006003095A1
Authority
WO
WIPO (PCT)
Prior art keywords
energy storage
storage capacitor
ignition
arrangement according
arrangement
Prior art date
Application number
PCT/EP2005/052865
Other languages
German (de)
English (en)
Inventor
Christian Zelger
Original Assignee
Siemens Aktiengesellschaft
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 Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Publication of WO2006003095A1 publication Critical patent/WO2006003095A1/fr

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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
    • 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

Definitions

  • the invention relates to an arrangement for controlling a personal protection system of a motor vehicle, which has an energy storage capacitor which is arranged parallel to a series circuit comprising an ignition element and a controllable power stage.
  • Such an arrangement in which the personal protection system is designed as occupant protection system is known from DE 197 32 677 A1.
  • a circuit arrangement for controlling a personal protection system of a motor vehicle in which an energy storage capacitor is arranged parallel to a series circuit comprising a first controllable power stage, an ignition element of the occupant protection device and a further controllable power stage is known from EP 0 684 163 B1 .
  • one of the power stages, initiated by a control circuit is closed for test purposes, while at the same time the other power stage is in the blocking state remains so that in such a routine, the ignition element is not ignited.
  • a current sensor measures a power stage that is turned on for testing, so that the determined current allows a conclusion to be drawn on the functionality of the power stage.
  • the closing capacity of the power stage can be checked when discharged ⁇ nergie Eatkondensator when the series circuit of the ignition element and the power stage is acted upon by a current that does not ignite an ignition of the same when flowing through the ignition element.
  • the power supplied by the power source is dimensioned such that the energy storage capacitor is charged within half a very short time to its ignition voltage.
  • occupant protection means Controlling an occupant protection means with which the occupants of a motor vehicle are to be protected against injuries.
  • occupant protection means are the initially mentioned airbags, belt tensioners, roll bars or similar devices.
  • Occupant protection systems only require lower energies to activate the respective actuator.
  • EP 0 471 871 A1 discloses an arrangement for activating an occupant protection system of a motor vehicle, which has ignition units arranged in a decentralized manner by a control unit.
  • the control unit comprises the sensors and components necessary for the detection and evaluation of a collision.
  • the ignition units have the ignition capacitor, the ignition element and switching elements for triggering the ignition element.
  • the drive signal receive ignition units from the controller, which are connected to each other via an optical or electrical data line.
  • the attachment of the ignition capacitors contained in the ignitors allows kur ⁇ ze and relatively thin ignition cables between the capacitors and the ignition elements, whereby a low ohmic and in ⁇ dukommiesleiungswiderstand is achieved. As a result, high current pulses with steep rising edges can be realized.
  • the Heidelbergsanord ⁇ described in this document has the disadvantage that a review of Zünd ⁇ units by the control unit is not feasible, since the control unit and ignition units are each tennen only connected via a data line.
  • the object of the present invention is to provide an arrangement for driving a personal protection system ei ⁇ nes motor vehicle, which allows a functional check of the power level in the arrangement and at the same time allows the activation of actuators with high energy requirements.
  • the energy storage capacitor and the ignition element are arranged together in an ignition unit, which are arranged spatially separated from a control unit containing the controllable power stage.
  • the invention is thus based on the idea to shift the energy storage capacitor from the control unit into the ignition unit containing the ignition element.
  • the relocation brings considerable economic advantages, since energy storage capacitors, which must generate up to 25 amperes of drive current when activating an actuator, have such a size that they can not be economically integrated into the control unit. Nonetheless, the arrangement according to the invention furthermore makes it possible to check the line level for its functionality.
  • a line extending between the ignition unit and the control unit is provided for the charge and discharge of the energy storage capacitor.
  • the cable must be able to transmit the ignition current required to trip the actuator.
  • currents in the range of up to 25 amperes must be transmitted. This is necessary because the power stage necessary for the activation is spatially separated from the ignition unit in the control unit.
  • the voltage necessary for the charging and discharging of the energy storage capacitor is provided by an energy source of the control device.
  • control device for controlling the controllable switch on a control circuit, wherein a control is carried out in response to a signal evaluated by a sensor device.
  • the sensor device can be integrated in the control unit. It is also conceivable that the sensors and the evaluation of the signals supplied by the sensors are carried out in another device, only the result is transmitted to the control unit or the control circuit.
  • a decoupling resistor is connected in series with the parallel circuit of the energy storage capacitor and the series circuit of the ignition element and the power stage.
  • the arrangement according to the invention is designed in such a way that a test voltage dropping in the series circuit can be picked up and evaluated in the case of at least substantially discharged energy storage capacitor and lei ⁇ tend switched power stage by the test circuit is applied to the parallel circuit.
  • the test voltage is formed by a node, which is formed between the energy storage element and the ignition element, and a terminal of the energy source supplying the arrangement.
  • the test voltage can be absorbed by a device of the control device.
  • the test current can also be supplied by a power source in the controller.
  • the test current is smaller than an ignition current required for ignition of the ignition element.
  • the determination of the test current is carried out by the control unit so that unintentional ignition of the ignition element can be reliably prevented.
  • the power stage is switchable after its conductive switching for test purposes, after which the test voltage can be picked up and evaluated by the control unit.
  • Figure 1 shows an arrangement for driving a personal protection system according to a first variant
  • Figure 2 shows an arrangement for driving a Wegtress ⁇ system according to a second variant.
  • FIG. 1 shows the structure of an inventive arrangement for driving a personal protection system of a Kraftfahr ⁇ zeugs in a first variant.
  • the arrangement has a Ignition unit 10 and. a control unit 20, which are arranged spatially separated from each other in a motor vehicle.
  • Ignition units 10 and control unit 20 are connected to each other via a line 9, via which the control unit 20 can supply the ignition unit with a charging current and via wel ⁇ che on the other hand in the case of activation of the ignition unit, a correspondingly high drive current can flow.
  • the ignition unit 10 has an ignition element 2 and an energy storage capacitor 1 connected thereto.
  • the energy storage capacitor 1 contains the energy necessary for triggering the ignition element 2.
  • the Zündein ⁇ unit 10 is controlled by the control unit 20. This has a power stage 3, wherein this is connected in parallel with the ignition element 2 the energy storage capacitor 1 paral ⁇ lel.
  • a control circuit 4 is provided in the control unit 20, which can open or close the power stage 3 with a control signal ST.
  • the voltage for charging the energy storage capacitor 1 is provided via a charging resistor 5, which serves to limit the charging current, and a charging diode 6.
  • the triggering of the ignition element is caused by the control unit 20 by activating the trigger signal ST.
  • the energy storage capacitor 1 is then discharged by the ignition element 2 and the power stage 3 low impedance.
  • the second variant of the arrangement according to the invention shown in FIG. 2 also has a decoupling resistor 8 which is arranged in series with the series connection of the ignition element 2 and the power stage 3 for the parallel connection of energy storage capacitor 1.
  • the variants described above both allow An ⁇ control of a pedestrian protection system, which requires actuators that must be operated at very high currents.
  • the elements integrated in the ignition unit 10 can be integrated in an integrated manner. Det, wherein the controller 20 can be kept small. Due to the outsourcing of the energy storage capacitor from the control unit to the ignition unit, the control unit can be constructed more flexibly.
  • the adaptation of the energy storage capacitor to the requirements of the ignition element can be carried out independently of the control unit in the ignition unit itself, wherein a plurality of ignition units can be actuated with a single control unit.
  • the control unit can thereby, blocked ⁇ results regardless of the number of 1 to be controlled ignition units, always the same size.
  • the essential advantage of the invention is therefore that no space for the energy storage capacitor is to be provided in the control unit. This results in a significant cost reduction.
  • the power stage 3 is turned on and a voltage is applied to the terminal V.
  • the voltage at the terminal K1 must correspond to the potential which is applied to the terminal 7 (reference potential in the present example). However, if a voltage is detected at the terminal Kl, which is above the voltage applied to the terminal 7, this indicates a defect of the power level 3.
  • a differential voltage applied between the terminal K1 and a terminal K2 can furthermore be monitored and checked.
  • the ignition circuit resistance can be determined and diagnosed.
  • the variant shown in FIG. 2 has the advantage over the first variant of FIG. 1 that it is not only testable for its functionality, but is also short-circuit proof with respect to the supply or reference potential.
  • the variant shown according to FIG. 2 is therefore particularly suitable for actuators which are not reversible and for which special safety measures have to be taken.
  • the system reliability is not impaired if the terminal Kl has a short circuit to the supply voltage of the control unit 20.
  • the energy storage capacitor 1 will charge or discharge the battery voltage, depending on the prevailing voltage.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Air Bags (AREA)
  • Automotive Seat Belt Assembly (AREA)

Abstract

L'invention concerne un circuit de commande d'un moyen de protection de personnes dans un véhicule automobile, ce circuit comprenant un condensateur de stockage d'énergie (1) disposé parallèlement à un montage en série comprenant un élément d'allumage (2) et un étage de puissance réglable (3). L'invention se caractérise en ce que le condensateur de stockage d'énergie (1) et l'élément d'allumage (2) sont regroupés dans une unité d'allumage (10) qui est séparée spatialement d'un appareil de commande (20) contenant l'étage de puissance réglable (3).
PCT/EP2005/052865 2004-07-05 2005-06-21 Circuit de commande d'un moyen de protection de personnes dans un vehicule automobile WO2006003095A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200410032585 DE102004032585B4 (de) 2004-07-05 2004-07-05 Anordnung zum Steuern eines Personenschutzmittels eines Kraftfahrzeugs
DE102004032585.5 2004-07-05

Publications (1)

Publication Number Publication Date
WO2006003095A1 true WO2006003095A1 (fr) 2006-01-12

Family

ID=34979874

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2005/052865 WO2006003095A1 (fr) 2004-07-05 2005-06-21 Circuit de commande d'un moyen de protection de personnes dans un vehicule automobile

Country Status (2)

Country Link
DE (1) DE102004032585B4 (fr)
WO (1) WO2006003095A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008007286A1 (de) * 2008-02-02 2009-08-06 Conti Temic Microelectronic Gmbh Steuergerät für ein Insassenschutzsystem

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0471871A1 (fr) * 1990-08-22 1992-02-26 Siemens Aktiengesellschaft Disposition d'appareils pour la protection des passagers d'un véhicule
EP0684163A2 (fr) * 1994-05-26 1995-11-29 TEMIC TELEFUNKEN microelectronic GmbH Procédé pour l'activation d'un étage amplificateur de sortie d'un dispositif de sécurité pour véhicule
DE19732677A1 (de) * 1997-07-29 1999-03-04 Siemens Ag Anordnung und Verfahren zum Testen einer Schaltungsvorrichtung, die zum Steuern eines Insassenschutzmittels eines Kraftfahrzeugs vorgesehen ist
DE10022173A1 (de) * 2000-05-06 2001-11-15 Daimler Chrysler Ag Verfahren zur Auslösung von Insassenschutzeinrichtungen
US6332399B1 (en) * 1998-04-30 2001-12-25 Daimlerchrysler Ag Igniting element
DE10059949A1 (de) * 2000-12-02 2002-07-04 Conti Temic Microelectronic Elektronische Baugruppe für ein Kraftfahrzeug sowie Verfahren zum Betreiben einer solchen Baugruppe
US20030040860A1 (en) * 2000-03-29 2003-02-27 Christian Zelger Method and device for triggering at least one firing element for a restraining means in a motor vehicle

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0471871A1 (fr) * 1990-08-22 1992-02-26 Siemens Aktiengesellschaft Disposition d'appareils pour la protection des passagers d'un véhicule
EP0684163A2 (fr) * 1994-05-26 1995-11-29 TEMIC TELEFUNKEN microelectronic GmbH Procédé pour l'activation d'un étage amplificateur de sortie d'un dispositif de sécurité pour véhicule
DE19732677A1 (de) * 1997-07-29 1999-03-04 Siemens Ag Anordnung und Verfahren zum Testen einer Schaltungsvorrichtung, die zum Steuern eines Insassenschutzmittels eines Kraftfahrzeugs vorgesehen ist
US6332399B1 (en) * 1998-04-30 2001-12-25 Daimlerchrysler Ag Igniting element
US20030040860A1 (en) * 2000-03-29 2003-02-27 Christian Zelger Method and device for triggering at least one firing element for a restraining means in a motor vehicle
DE10022173A1 (de) * 2000-05-06 2001-11-15 Daimler Chrysler Ag Verfahren zur Auslösung von Insassenschutzeinrichtungen
DE10059949A1 (de) * 2000-12-02 2002-07-04 Conti Temic Microelectronic Elektronische Baugruppe für ein Kraftfahrzeug sowie Verfahren zum Betreiben einer solchen Baugruppe

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Publication number Publication date
DE102004032585B4 (de) 2008-09-11
DE102004032585A1 (de) 2006-02-09

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