WO2020052720A1 - Module de coussin gonflable de sécurité et système de coussin gonflable de sécurité - Google Patents

Module de coussin gonflable de sécurité et système de coussin gonflable de sécurité Download PDF

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Publication number
WO2020052720A1
WO2020052720A1 PCT/DE2019/200100 DE2019200100W WO2020052720A1 WO 2020052720 A1 WO2020052720 A1 WO 2020052720A1 DE 2019200100 W DE2019200100 W DE 2019200100W WO 2020052720 A1 WO2020052720 A1 WO 2020052720A1
Authority
WO
WIPO (PCT)
Prior art keywords
airbag
solenoid valve
valve
gas
movement
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.)
Ceased
Application number
PCT/DE2019/200100
Other languages
German (de)
English (en)
Inventor
Andreas MÜLLER
Matthias Bleeck
Andreas Forster
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.)
Aumovio Germany GmbH
Original Assignee
Continental Automotive Technologies 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 Continental Automotive Technologies GmbH filed Critical Continental Automotive Technologies GmbH
Publication of WO2020052720A1 publication Critical patent/WO2020052720A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • B60R21/02—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
    • B60R21/26—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow
    • B60R21/263—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow using a variable source, e.g. plural stage or controlled output
    • 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
    • B60R21/26—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow
    • B60R21/268—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow using instantaneous release of stored pressurised gas
    • 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
    • B60R21/26—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow
    • B60R2021/26094—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow characterised by fluid flow controlling 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
    • B60R21/02—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
    • B60R21/26—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow
    • B60R21/263—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow using a variable source, e.g. plural stage or controlled output
    • B60R2021/2633—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow using a variable source, e.g. plural stage or controlled output with a plurality of inflation levels
    • B60R2021/2636—The volume of gas being continuously adjustable

Definitions

  • the invention relates to an airbag module and an airbag system, which usually form part of an occupant restraint system in motor vehicles.
  • Airbag systems usually have a plurality of airbag modules, each of which comprises at least one airbag sack, which is filled with an airbag gas if an impact occurs.
  • the airbag sack unfolds within a short time interval from 10 ms to 50 ms between an occupant and parts of an interior of the motor vehicle, and forms a cushion. This prevents the occupant from hitting hard parts of the interior, such as a steering wheel or dashboard.
  • the airbag gas is provided in a gas generator, for example in a cold gas generator, with a high pressure between 50 bar and 1000 bar.
  • Airbag systems furthermore have at least one sensor which detects an instant tO in the event of an impact. After a certain time (ms range) after this impact time tO, the airbag deployment is started.
  • the airbag modules have, for example, a cold gas generator which provides the airbag gas with which the airbag bag is to be filled.
  • the airbag gas from the cold gas generator flows into the airbag sack, fills it and ensures its deployment.
  • the airbag system currently triggers shortly after the impact tO, ie only after the impact has already occurred.
  • it is planned to recognize a point in time tn by suitable sensors and evaluation of their signals at which an impact is unavoidable. It is planned to activate the airbag system before the impact, in order to be able to protect the occupant or occupants of a motor vehicle even better from injuries.
  • a valve arrangement is provided in a gas supply line between the cold gas generator and the airbag bag, via which it is possible to specifically adapt the filling of the airbag bag with the airbag gas to an impact course in the event of an accident.
  • the object of the invention is to propose an airbag module that functions reliably even with a small amount of electrical energy that can be supplied.
  • An airbag module has an airbag bag, which is filled with a pressurized airbag gas during operation, and a cold gas generator for providing the pressurized airbag gas. Furthermore, the airbag module has a gas supply between the cold gas generator and the airbag bag for supplying the pressurized airbag gas from the cold gas generator into the airbag bag. A valve arrangement for releasing a predefined mass flow m of the pressurized airbag gas from the gas generator is arranged in the gas supply.
  • the mass flow m of the airbag gas is defined by the
  • the valve arrangement has an electrically controllable solenoid valve which is designed as a bistable valve.
  • an electrically controllable solenoid valve is provided in the gas supply between the cold gas generator and the airbag bag, it is possible to specifically adapt the filling of the airbag bag with the airbag gas to an impact course in the event of an accident.
  • control of the mass flow m of the airbag gas from the cold gas generator is required.
  • the electrically controllable solenoid valve can be specifically controlled at any time before, during and after the impact of the mass flow iii, and thus the filling of the airbag bag can be regulated at any time. This makes it possible to adapt the filling of the airbag bag to the course of the impact.
  • the solenoid valve is formed as a bistable valve, it has two positions that the valve can hold independently, ie without the supply of external energy. This makes it possible to maintain an open or a closed position of the solenoid valve in a targeted manner, even if because of a Interruption of the power supply, no electrical energy is available.
  • the bistable valve preferably has an actuator element which can be moved along an axis of movement, two holding positions for the actuator element which are located opposite one another along the axis of movement and in which the actuator element is held without electrical energy supply.
  • bistable valve therefore limits the amount of energy required to operate the solenoid valve. Only when the bistable valve has to switch between its two holding positions - open position and closed position - is there a current flow, i.e. H. an electrical power supply, necessary. For the rest of the time, the bistable valve remains in one of the two holding positions without additional energy being supplied from outside.
  • a current flow i.e. H. an electrical power supply
  • An electrical energy supply is only required at the time of activation or deactivation of the valve. It is possible to activate the bistable valve via the small electrical energy reserve in the control device. As a result, the airbag module can be operated safely without the supply of external energy and is therefore independent of an energy supply.
  • the bistable valve can be deactivated, for example, after the external energy supply has been reactivated.
  • an airbag system which has the airbag module as described above has a control device for driving the solenoid valve, the control device having an electrical energy reserve which can be supplied to the solenoid valve in order to induce movement of the actuator element along the movement axis .
  • the control device for driving the solenoid valve is advantageously designed such that the solenoid valve for Inducing the movement of the actuator element is only subjected to an electrical pulse.
  • the electrical impulse is sufficient to move the actuator element from one of the two holding positions towards the other holding position.
  • FIG. 1 is a schematic representation of an airbag system with an airbag bag, a cold gas generator, a gas supply between the cold gas generator and airbag bag and a bistable valve in the gas supply.
  • FIG. 2 shows a schematic illustration of a current flow to a solenoid valve in the airbag system from FIG. 1, wherein in a) the solenoid valve is designed as a normal valve and in b) the solenoid valve is designed as a bistable valve.
  • FIG. 1 shows a schematic illustration of an airbag system 10 which is part of occupant protection in a motor vehicle.
  • the airbag system 10 has an airbag module 12 and a control device 14 which specifically controls the airbag module 12.
  • the airbag module 12 comprises a cold gas generator 16 and an airbag bag 18, in which a pressurized airbag gas 20 is provided in the cold gas generator 16, which inflates the airbag bag 14 during operation of the airbag module 12, whereby it unfolds, forms a cushion and occupants of hard parts of the Motor vehicle separates. Injuries to the occupants can thereby be avoided.
  • the control device 14 detects the signals from the sensors and determines the expected impact course from these signals. In this way, the control device 14 can define which mass flow m of the airbag gas 20 must be supplied to the airbag bag 18.
  • the airbag module 12 has a gas supply 22, via which the airbag gas 20 can be guided from the cold gas generator 16 to the airbag bag 18.
  • a valve arrangement 24 is provided in the gas supply 22, which has an electrically controllable solenoid valve 26 which can be controlled via the control device 14 in such a way that the gas supply 22 can be opened or closed in a targeted manner.
  • a mass flow iii of the airbag gas 20 supplied from the cold gas generator 16 to the airbag bag 18 can be controlled in a predefined manner.
  • the solenoid valve 26 has a valve region 28, in which a closing element 30 cooperates with a valve seat 32 in order to hold the solenoid valve 26 in a closed position.
  • the closing element 30 is coupled to an actuator element 34 of the solenoid valve 26, which exerts a movement force F B on the closing element 30 in an electrically controlled state, so that the closing element 30 moves between its closed position and its open position.
  • the anchor element 34 moves along a movement axis 36 and takes the closing element 30 with it in each case.
  • the actuator element 34 is set in motion along the movement axis 36 in that it receives an electrical energy supply from the control device 14 by applying a current I to it.
  • the solenoid valve 26 in FIG. 1 is designed as a bistable valve 38. This means that the actuator element 34 can assume two stable holding positions 40, 42 along the movement axis 36, which are opposite each other along the movement axis 36.
  • the actuator element 34 is in one of these holding positions 40, 42, no external electrical energy supply, for example via the control device 14, is required so that the actuator element 34 remains in the respective holding position 40, 42. I.e. in these two holding positions 40, 42 the sol enoid valve 26 is stable.
  • the solenoid valve 26 does not have to be continuously supplied with a current I in order to be able to change from the closed position to the open position and vice versa.
  • the solenoid valve 26 is therefore particularly energy-efficient.
  • the solenoid valve 26 cannot be supplied via the “normal” current flow, for example via a functional battery. If the solenoid valve 26, as was previously the case, is designed as a “normal” valve, it is often no longer possible after an accident to selectively control the solenoid valve 26.
  • FIG. 2a This situation is shown in the schematic illustration in FIG. 2a), which corresponds to the prior art.
  • a current I flows via the control device 14 to the solenoid valve 26, which, as is known from the prior art, is designed as a “normal” solenoid valve.
  • the power supply from the battery 44 now becomes due to an accident interrupted, the solenoid valve 26 is no longer supplied with electrical energy and can therefore no longer be controlled by the control device 14.
  • 2b) shows an airbag system 10 in which a bistable valve 38 is used instead of a “normal” solenoid valve 26.
  • an energy reserve 46 that is present in the control device 14 is sufficient here, so that normal control of the bistable valve 38 is possible even with an interrupted power supply from the battery 44.

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Air Bags (AREA)

Abstract

L'invention concerne un module (12) de coussin gonflable de sécurité, ainsi qu'un système (10) de coussin gonflable de sécurité, qui comporte un module (12) de coussin gonflable de sécurité de ce type. Le module (12) de coussin gonflable de sécurité comporte un ensemble formant soupape (24) comprenant une soupape solénoïde (26), qui est réalisée sous la forme d'une soupape bistable (38).
PCT/DE2019/200100 2018-09-13 2019-08-22 Module de coussin gonflable de sécurité et système de coussin gonflable de sécurité Ceased WO2020052720A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018215570.4 2018-09-13
DE102018215570.4A DE102018215570A1 (de) 2018-09-13 2018-09-13 Airbagmodul und Airbagsystem

Publications (1)

Publication Number Publication Date
WO2020052720A1 true WO2020052720A1 (fr) 2020-03-19

Family

ID=67953508

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2019/200100 Ceased WO2020052720A1 (fr) 2018-09-13 2019-08-22 Module de coussin gonflable de sécurité et système de coussin gonflable de sécurité

Country Status (2)

Country Link
DE (1) DE102018215570A1 (fr)
WO (1) WO2020052720A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005016826A1 (de) * 2005-04-12 2006-10-19 Trw Automotive Gmbh Ansteuerschaltung für einen impulsgesteuerten Aktor
WO2008033110A1 (fr) * 2006-09-14 2008-03-20 Mykola Serghiyovych Babych Dispositif de sécurité à coussin gonflable et soupape assurant son fonctionnement
DE10296907B4 (de) * 2001-07-13 2016-03-10 Sergji Nikolaevič Isakov Sicherheitsgerät zur Installation in einem Verkehrsmittel

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10296907B4 (de) * 2001-07-13 2016-03-10 Sergji Nikolaevič Isakov Sicherheitsgerät zur Installation in einem Verkehrsmittel
DE102005016826A1 (de) * 2005-04-12 2006-10-19 Trw Automotive Gmbh Ansteuerschaltung für einen impulsgesteuerten Aktor
WO2008033110A1 (fr) * 2006-09-14 2008-03-20 Mykola Serghiyovych Babych Dispositif de sécurité à coussin gonflable et soupape assurant son fonctionnement

Also Published As

Publication number Publication date
DE102018215570A1 (de) 2020-03-19

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