WO2022268268A1 - Verfahren zur auslösung von insassenschutzeinrichtungen in einem kraftfahrzeug auf basis der signale zumindest eines rechten und zumindest eines linken upfrontsensors sowie des signals zumindest eines zentral im fahrzeug angeordneten aufprallsensors - Google Patents
Verfahren zur auslösung von insassenschutzeinrichtungen in einem kraftfahrzeug auf basis der signale zumindest eines rechten und zumindest eines linken upfrontsensors sowie des signals zumindest eines zentral im fahrzeug angeordneten aufprallsensors Download PDFInfo
- Publication number
- WO2022268268A1 WO2022268268A1 PCT/DE2022/200109 DE2022200109W WO2022268268A1 WO 2022268268 A1 WO2022268268 A1 WO 2022268268A1 DE 2022200109 W DE2022200109 W DE 2022200109W WO 2022268268 A1 WO2022268268 A1 WO 2022268268A1
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- WO
- WIPO (PCT)
- Prior art keywords
- signal
- sensor
- fcs
- upfront
- triggering
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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
- B60R21/013—Electrical 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
- B60R21/0132—Electrical 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
-
- 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
- B60R21/013—Electrical 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
- B60R21/0136—Electrical 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
-
- 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
- B60R2021/0002—Type of accident
- B60R2021/0009—Oblique collision
-
- 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
- B60R2021/01013—Means for detecting collision, impending collision or roll-over
-
- 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
- B60R2021/01034—Controlling a plurality of restraint devices
Definitions
- the invention relates to a method for triggering occupant protection devices in a motor vehicle based on the signals of at least one right and at least one left upfront sensor and the signal of at least one impact sensor arranged centrally in the vehicle.
- the triggering of occupant protection devices in a motor vehicle on the basis of the signals of at least one right and at least one left upfront sensor and the signal of at least one impact sensor arranged centrally in the vehicle have been known per se for decades, with the signals being compared to thresholds and an impact type and impact severity being derived therefrom will.
- a plurality of triggering paths with different criteria are provided in order to do justice, for example, to the different types of impact or requirements for the decision to trigger or not to trigger certain occupant protection devices and with regard to the triggering time. Precisely because of the partial overlaps in the signal behavior between triggering and non-triggering cases, as well as the requirement for the earliest possible triggering decision and thus case differentiation, leads to the majority of triggering paths and the respective optimization.
- Acceleration sensors integrated in the control unit of the occupant protection system are generally used as central impact sensors in the vehicle, although the use of central acceleration sensors from other control units or a sensor cluster is also conceivable.
- For the so-called upfront sensors i.e. sensors relocated to the front of the vehicle, e.g Pressure changes inside a cavity, such as an elastic hose.
- EP 1028039 A2 describes a device for activation control of a passenger safety system for controlling activation of the passenger safety system mounted on a vehicle in the event that the vehicle collides with an obstacle, the device for activation control having a plurality of upfront sensors, i.e. impact detection means, which placed in several different positions in a front portion of the vehicle.
- collision type identification means for identifying a collision type of the vehicle based on values which are detected by the plurality of impact detection means are already known per se. At this time, the collision type identifying means identifies the collision type as an oblique collision when there is a time difference between increases in the values detected by the right and left collision detecting means after the collision of the vehicle.
- EP 2504201 A1 proposes a method for detecting the width of an impact area of an object in the front area of a vehicle, which has a step of receiving a first deformation element signal, which represents a change in the distance between components of a first deformation element installed in the left front area of the vehicle .
- the method also includes a step of obtaining a second deformation element signal, which represents a change in the distance between components of a second deformation element installed in the right front area of the vehicle.
- these two deformation elements with their corresponding sensors also represent an embodiment of upfront sensors.
- Deformation element signal differs by more than a predefined threshold level from the second deformation element signal.
- the object of the present invention is to further increase safety in road traffic and to present a method that enables early and at the same time safe triggering of certain selected occupant protection devices in certain oblique impact events with the appropriate intensity, without also triggering typical non-triggering cases or known total triggering cases already address.
- Oblique impact events with high collision energy, i.e. high relative speed between the collision objects, require a very special optimization of the protective effect of certain
- Occupant protection devices ie their early triggering as defined in the previously known crash scenarios or triggering paths.
- An essential idea of the invention is that the signals from the two upfront sensors are evaluated in relation to the signal from the central sensor and at the same time this ratio is also evaluated in relation to the two upfront sensors.
- a predefined selection of occupant protection devices is triggered early when the signal from one of the two upfront sensors in relation to the signal from the central sensor already exceeds a second threshold value, while the signal from the other upfront sensor in relation to the signal from the central sensor is still below a first threshold value and, moreover, the signal from the upfront sensor, which exceeds the second threshold in relation to the signal from the central sensor, also exceeds a predetermined characteristic curve. It should be pointed out again that there is of course usually a plurality of there are other triggering paths and the threshold values there are different and then become active for other triggering cases.
- the specified characteristic curve has at least a first section, as long as the signal from the central sensor is at least smaller than a specified limit value and triggering occurs in this section if one of the two upfront sensors exceeds the second threshold while the other upfront sensor is still is below the first threshold and otherwise no tripping occurs in this section via this tripping path and this section.
- at least one further section is provided in which the triggering via this triggering path is suppressed as soon as the signal from the central sensor is greater than a predetermined limit value.
- a further middle section in which the second threshold value for the upfront sensor also increases with increasing value for the central sensor, from which point triggering occurs, i.e. the two sections are more or less converted into one another via this middle section will.
- the signal from the two upfront sensors is preferably integrated via a short-time integral, while the signal from the central sensor is fed to double integration and the signals obtained in this way are evaluated in relation to one another. From a purely physical point of view, this may not be to be expected, but in this case this unequal treatment is advantageous for crash detection.
- the method is preferably used to trigger a first of a plurality of stages of a driver and/or front passenger airbag and a side or window airbag on that side on which the upfront sensor shows the correspondingly large signal.
- a control unit for occupant protection devices has corresponding connections for the occupant protection devices and connections for the signals of at least two upfront sensors and at least one central impact sensor and a memory which contains an algorithm for carrying out the method according to the invention.
- a control unit for occupant protection devices has corresponding connections for the occupant protection devices and connections for the signals of at least two upfront sensors and at least one central impact sensor and a memory which contains an algorithm for carrying out the method according to the invention.
- other triggering paths are also implemented in the algorithm.
- 1A shows a known structure of an occupant protection system for a motor vehicle with a central control unit for occupant protection devices ACU and integrated at least one impact sensor G and an upfront sensor FCS_R arranged on the right-hand side and an upfront sensor FCS_L arranged on the left-hand side with respect to the direction of travel.
- further sensors can be installed in the front area, side area or centrally in the vehicle, in particular also having axes of sensitivity other than those directed only in the direction of travel, but reference is made to their signal component in the direction of travel for the relevant method here.
- FIG. 1A shows in somewhat more detail the relevant crash test setup of a so-called oblique test, which, above a certain level, triggers the activation of the airbags that protect the body, especially the head, at the side, i.e. side, window or so-called curtain airbags, particularly early on.
- FIG. 1C shows a so-called SOT small-overlap test, for which the signal curve is also explained in FIG.
- FIG. 1D shows a so-called ODB Offset Deformable Barrier Test, ie a deformable barrier which is also only partially hit and for which the signal curve is explained in FIG.
- FIG. 1E shows a different form of an oblique impact and for which the signal curve is explained in FIG.
- FIGS. 2A to 2C now outline the course of the signals from the two upfront sensors FCS_L and FCS_R and from the central impact sensor G im central airbag control unit ACU for the very early and short time window of 0 to 35 ms from the beginning of the collision in a particularly critical oblique test.
- the signals are not compared with a threshold in relation to time, but evaluated in relation to the signal from the central impact sensor. Therefore, FIGS. 2D and 2E show the value X of the double integral of the central impact sensor plotted on their X-axis and the value of the short-time integral of the respective upfront sensors on their Y-axis.
- the signal profile thus changes in relation to the signal from the central impact sensor with regard to the profile.
- FIGS. 2A to 2E serve purely to clarify and visualize the derivation of this synopsis from the respective time profiles of the sensor signals based on these impact events.
- Figures 3A to 3D now outline the evaluation of this synopsis below, with Figures 3A and 3C showing the curve of the short-time integral of the signal of the left upfront sensor FCS_L and Figures 3B and 3D the curve of the short-time integral of the signal of the right upfront sensor FCS_R.
- FIGS. 3A and 3B illustrate the evaluation with regard to the offset characteristic with 1. and 2nd threshold values th1 ⁇ th2, whereby for the side affected by the impact, i.e. here on the left, the 2nd, i.e. higher threshold value th2 (drawn in the figures dash-dot-dash) must be exceeded, while on the opposite side, i.e. here right side the signal is still below a first threshold value th1 (shown in broken lines in the figures).
- th1 shown in broken lines in the figures.
- the second threshold value is very low, but very early in relation to the signal of the central sensor G, i.e. the signal ACU X, which then speaks again for the particular crash severity.
- the signal ACU X which then speaks again for the particular crash severity.
- the lower limit Xmin is intended to compensate for or eliminate the signal fluctuations, which can sometimes be physically difficult to explain, especially at the beginning of the impact, and to avoid false triggering.
- the upper limit Xmax limits the application of this triggering path to the particular oblique impacts of particular severity.
- the signal of the upfront sensor hit more directly by the impact here FCS_L in the case according to Figures 1-3 namely in relation to the signal of the central sensor (G) must also exceed the second threshold (th2) exceeds, also exceeds a predetermined characteristic (th3).
- the specified characteristic curve (th3) delimits a triggering area, which is also filled with dots, from the remaining non-triggering area expressly exclusively for this triggering path, i.e. correspondingly large signals, especially at the central sensor, would of course also trigger triggering up to the total triggering of the entire system in the later course of the crash Lead occupant protection system, the characteristic curve specified here is optimized for the particularly early triggering of these severe oblique collisions.
- This characteristic curve th3 has this preferred embodiment of the first section (th3.1) as long as the signal from the central sensor (G) is at least smaller than a predetermined limit value (2.5) and in this section th3.1 a triggering occurs, if one of the two upfront sensors (FCS_L) also exceeds characteristic th3.
- the affected upfront sensor (FCS_L) must also exceed the second threshold (th2), while the other upfront sensor (FCS_R) is still below the first threshold (th1) and otherwise in this section (th3.1) there is no tripping via this tripping path and this section (th3.1) - as already explained in relation to Figures 3A and 3B and purely for the sake of clarity here in the Figures pulled apart to facilitate clarity.
- at least one further section (th3.3) is provided, in which the triggering via this triggering path is suppressed as soon as the signal from the central sensor (G) is greater than a predetermined limit value.
- FIGS. 3C and 3D also show another middle section th3.2, in which the second threshold value for the upfront sensor (FCS_L, FCS_R) also increases with the increasing value for the central sensor (G). which is triggered, as the figures make clear.
- FIGS. 3A to 3D show the typical course of an oblique collision of particular severity, for which particularly early triggering requires the specified selection of occupant protection devices, in particular exclusively a first of a plurality of stages of a driver and/or Includes passenger airbags and a side or window airbag on that side and is triggered exactly on that side in which the upfront sensor (FCS_L) shows the correspondingly large signal.
- FIG. 3A shows the corresponding function curve F on the left and the second, higher threshold value being exceeded, while in FIG. 3B the signal from the right upfront sensor is within the relevant range between Xmin and Xmax below the first threshold value.
- FIG. 3D is also shown purely for the sake of completeness, but is not significant for the triggering decision in this exemplary embodiment or impact events.
- the specific time curves and the amplitude level are obtained from real simulations, but are only intended as examples and to clarify the function in principle.
- FIGS. 4 et seq. sketch further, different crash courses for the exemplary embodiment and are intended to sketch the functioning and delimitation of the triggering decision for this triggering case in more detail, but reference is made accordingly to FIGS. 3A to 3D, which have already been explained in detail.
- FIGS. 4A to 4D show a so-called SOT 64kph, small overlap test according to FIG not at the moment this particularly sensitive tripping path is to be used.
- the signal curve above the second threshold value th2 in Figure 4A is again on the left of the hit side, the third characteristic curve th3 within the triggering window (dotted) is just not fulfilled on this side of the vehicle on the left, even if the severity is of course straight later in the course of the crash is also very clear on the central sensor - but then other trigger paths intervene.
- FIGS. 4B and 4D again show the atypical signals, which can only be explained by indirect deformations of the front of the vehicle and which are by no means negligible, on the side that was actually not hit here on the right, whereby these partly do not fall into the triggering decision at all due to the limitation Xmin.
- Xmin the limitation of the limitation
- the case of an oblique impact according to FIG. 1E shown in FIGS. 6A to 6D is significantly more difficult in terms of case selection, which shows clearly recognizable deflections of the upfront sensors despite a significantly lower speed of “only” 40 km/h.
- the right side of the vehicle is hit first, but again atypically the opposite, i.e. left upfront sensor system initially shows a deflection.
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Abstract
Description
Claims
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US18/570,308 US20240383430A1 (en) | 2021-06-21 | 2022-06-09 | Method for triggering occupant protection devices in a motor vehicle |
| JP2023569670A JP7631557B2 (ja) | 2021-06-21 | 2022-06-09 | 右側の少なくとも一つの、及び、左側の少なくとも一つのアップフロントセンサの信号、並びに、車両中央に配置された少なくとも一つの衝突センサの信号を基に動力車両内の搭乗者保護手段を作動させるための方法 |
| MX2023014839A MX2023014839A (es) | 2021-06-21 | 2022-06-09 | Metodo para la activacion de dispositivos de proteccion de los ocupantes en un vehiculo de motor a partir de las se?ales de como minimo un sensor delantero derecho y de como minimo un sensor delantero izquierdo, asi como de la se?al de como minimo un sensor de impacto dispuesto en el centro del vehiculo. |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP21465529.2 | 2021-06-21 | ||
| EP21465529 | 2021-06-21 | ||
| DE102021206363.2 | 2021-06-22 | ||
| DE102021206363.2A DE102021206363B4 (de) | 2021-06-21 | 2021-06-22 | Verfahren zur Auslösung von Insassenschutzeinrichtungen in einem Kraftfahrzeug auf Basis der Signale zumindest eines rechten und zumindest eines linken Upfrontsensors sowie des Signals zumindest eines zentral im Fahrzeug angeordneten Aufprallsensors |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2022268268A1 true WO2022268268A1 (de) | 2022-12-29 |
Family
ID=82117301
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/DE2022/200109 Ceased WO2022268268A1 (de) | 2021-06-21 | 2022-06-09 | Verfahren zur auslösung von insassenschutzeinrichtungen in einem kraftfahrzeug auf basis der signale zumindest eines rechten und zumindest eines linken upfrontsensors sowie des signals zumindest eines zentral im fahrzeug angeordneten aufprallsensors |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20240383430A1 (de) |
| JP (1) | JP7631557B2 (de) |
| MX (1) | MX2023014839A (de) |
| WO (1) | WO2022268268A1 (de) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19751336A1 (de) * | 1996-11-20 | 1998-06-04 | Toyota Motor Co Ltd | Einrichtung und Verfahren zur Einschaltsteuerung einer Fahrzeuginsassen-Sicherheitsvorrichtung |
| EP1028039A2 (de) | 1999-02-09 | 2000-08-16 | Toyota Jidosha Kabushiki Kaisha | Zündvorrichtung für ein Rückhaltesystem mit einer Aufprallerkennungsvorrichtung |
| JP2002178872A (ja) * | 2000-12-08 | 2002-06-26 | Toyota Motor Corp | 衝突形態判定装置及び乗員保護装置の起動制御装置 |
| DE19936819B4 (de) * | 1999-03-02 | 2004-11-11 | Mitsubishi Denki K.K. | Kollisions-Erfassungsvorrichtung für ein Fahrzeug |
| DE10223522B4 (de) * | 2001-10-16 | 2009-02-12 | Mitsubishi Denki K.K. | Kollisionsform-Entscheidungseinrichtung |
| JP4250787B2 (ja) * | 1998-08-07 | 2009-04-08 | 株式会社デンソー | 車両用乗員保護システム及びその衝突判定装置 |
| EP2504201A1 (de) | 2009-11-24 | 2012-10-03 | Robert Bosch GmbH | Verfahren und steuergerät zur erkennung einer breite eines aufprallbereiches eines objektes im frontbereich eines fahrzeugs |
| EP2928730B1 (de) * | 2012-12-06 | 2018-11-28 | TRW Automotive U.S. LLC | Verfahren und vorrichtung zur steuerung einer betätigbaren rückhaltevorrichtung mithilfe einer verbesserten mehrzonenunterscheidung |
| US20190016286A1 (en) * | 2017-07-17 | 2019-01-17 | Trw Automotive U.S. Llc | Enhanced discrimination method and apparatus for controlling an actuatable restraining device |
| DE102017102751B4 (de) * | 2016-02-15 | 2020-07-09 | Toyota Jidosha Kabushiki Kaisha | Aktivierungssteuervorrichtung und Aktivierungssteuerverfahren für Insassenschutzvorrichtung |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP3541211B2 (ja) * | 1997-09-17 | 2004-07-07 | オートリブ・ジャパン株式会社 | エアバッグの作動判断装置 |
| JP2001030873A (ja) * | 2000-01-01 | 2001-02-06 | Toyota Motor Corp | 乗員保護装置の起動制御装置 |
| JP4417200B2 (ja) * | 2004-08-04 | 2010-02-17 | カルソニックカンセイ株式会社 | 乗員保護装置の展開判断方法及びその方法を用いる乗員保護装置 |
| US8463500B2 (en) * | 2006-03-30 | 2013-06-11 | Ford Global Technologies | Method for operating a pre-crash sensing system to deploy airbags using inflation control |
| US11560108B2 (en) * | 2020-03-19 | 2023-01-24 | Zf Friedrichshafen Ag | Vehicle safety system and method implementing weighted active-passive crash mode classification |
-
2022
- 2022-06-09 WO PCT/DE2022/200109 patent/WO2022268268A1/de not_active Ceased
- 2022-06-09 JP JP2023569670A patent/JP7631557B2/ja active Active
- 2022-06-09 MX MX2023014839A patent/MX2023014839A/es unknown
- 2022-06-09 US US18/570,308 patent/US20240383430A1/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19751336A1 (de) * | 1996-11-20 | 1998-06-04 | Toyota Motor Co Ltd | Einrichtung und Verfahren zur Einschaltsteuerung einer Fahrzeuginsassen-Sicherheitsvorrichtung |
| JP4250787B2 (ja) * | 1998-08-07 | 2009-04-08 | 株式会社デンソー | 車両用乗員保護システム及びその衝突判定装置 |
| EP1028039A2 (de) | 1999-02-09 | 2000-08-16 | Toyota Jidosha Kabushiki Kaisha | Zündvorrichtung für ein Rückhaltesystem mit einer Aufprallerkennungsvorrichtung |
| DE19936819B4 (de) * | 1999-03-02 | 2004-11-11 | Mitsubishi Denki K.K. | Kollisions-Erfassungsvorrichtung für ein Fahrzeug |
| JP2002178872A (ja) * | 2000-12-08 | 2002-06-26 | Toyota Motor Corp | 衝突形態判定装置及び乗員保護装置の起動制御装置 |
| DE10223522B4 (de) * | 2001-10-16 | 2009-02-12 | Mitsubishi Denki K.K. | Kollisionsform-Entscheidungseinrichtung |
| EP2504201A1 (de) | 2009-11-24 | 2012-10-03 | Robert Bosch GmbH | Verfahren und steuergerät zur erkennung einer breite eines aufprallbereiches eines objektes im frontbereich eines fahrzeugs |
| EP2928730B1 (de) * | 2012-12-06 | 2018-11-28 | TRW Automotive U.S. LLC | Verfahren und vorrichtung zur steuerung einer betätigbaren rückhaltevorrichtung mithilfe einer verbesserten mehrzonenunterscheidung |
| DE102017102751B4 (de) * | 2016-02-15 | 2020-07-09 | Toyota Jidosha Kabushiki Kaisha | Aktivierungssteuervorrichtung und Aktivierungssteuerverfahren für Insassenschutzvorrichtung |
| US20190016286A1 (en) * | 2017-07-17 | 2019-01-17 | Trw Automotive U.S. Llc | Enhanced discrimination method and apparatus for controlling an actuatable restraining device |
Also Published As
| Publication number | Publication date |
|---|---|
| US20240383430A1 (en) | 2024-11-21 |
| JP2024517306A (ja) | 2024-04-19 |
| MX2023014839A (es) | 2024-01-15 |
| JP7631557B2 (ja) | 2025-02-18 |
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