DE102015220531A1 - Method for controlling occupant protection devices of a motor vehicle as a function of a brake signal - Google Patents
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- DE102015220531A1 DE102015220531A1 DE102015220531.2A DE102015220531A DE102015220531A1 DE 102015220531 A1 DE102015220531 A1 DE 102015220531A1 DE 102015220531 A DE102015220531 A DE 102015220531A DE 102015220531 A1 DE102015220531 A1 DE 102015220531A1
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- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000011156 evaluation Methods 0.000 claims abstract description 8
- 230000001960 triggered effect Effects 0.000 claims abstract 2
- 230000001133 acceleration Effects 0.000 claims description 14
- 238000006073 displacement reaction Methods 0.000 claims description 8
- 230000010354 integration Effects 0.000 claims description 7
- 230000004044 response Effects 0.000 claims description 3
- 230000001419 dependent effect Effects 0.000 abstract description 2
- 238000012937 correction Methods 0.000 description 8
- 230000003213 activating effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000013519 translation Methods 0.000 description 2
- BUHVIAUBTBOHAG-FOYDDCNASA-N (2r,3r,4s,5r)-2-[6-[[2-(3,5-dimethoxyphenyl)-2-(2-methylphenyl)ethyl]amino]purin-9-yl]-5-(hydroxymethyl)oxolane-3,4-diol Chemical compound COC1=CC(OC)=CC(C(CNC=2C=3N=CN(C=3N=CN=2)[C@H]2[C@@H]([C@H](O)[C@@H](CO)O2)O)C=2C(=CC=CC=2)C)=C1 BUHVIAUBTBOHAG-FOYDDCNASA-N 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
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Classifications
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- 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
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
- B60T17/18—Safety devices; Monitoring
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
- B60T17/18—Safety devices; Monitoring
- B60T17/22—Devices for monitoring or checking brake systems; Signal devices
-
- 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
- B60R2021/01311—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 monitoring the braking system, e.g. ABS
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T2201/00—Particular use of vehicle brake systems; Special systems using also the brakes; Special software modules within the brake system controller
- B60T2201/02—Active or adaptive cruise control system; Distance control
- B60T2201/024—Collision mitigation systems
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transportation (AREA)
- Regulating Braking Force (AREA)
- Air Bags (AREA)
Abstract
Es wird ein Verfahren zur Steuerung von Insassenschutzeinrichtungen eines Kraftfahrzeugs beschrieben, bei welchem zumindest ein Signal zumindest eines Aufprallsensors und/oder zumindest ein daraus abgeleitetes Signal ausgewertet und mit zumindest einer Auslösebedingung verglichen und entsprechend die Insassenschutzeinrichtungen ausgelöst werden, wobei die Steuerung in Abhängigkeit von einem Bremssignal angepasst wird. Bisher erfolgte eine Anpassung der Auslöseschwelle bei einem Notbrems- oder ESP-Eingriff. Es wird hier jedoch vorgeschlagen, zumindest eines der Signale von dem zumindest einen Aufprallsensors oder zumindest ein daraus abgeleitetes Signal in Abhängigkeit von dem Bremssignal anzupassen und das so angepasste Signal der weiteren Auswertung zuzuführen.A method for controlling occupant protection devices of a motor vehicle is described in which at least one signal of at least one impact sensor and / or at least one signal derived therefrom are evaluated and compared with at least one triggering condition and the occupant protection devices are triggered accordingly, the control being dependent on a brake signal is adjusted. So far, an adjustment of the tripping threshold in an emergency brake or ESP intervention. However, it is proposed here to adapt at least one of the signals from the at least one impact sensor or at least one signal derived therefrom as a function of the braking signal and to supply the signal thus adapted for further evaluation.
Description
Die Erfindung betrifft ein Verfahren zur Steuerung von Insassenschutzeinrichtungen eines Kraftfahrzeugs gemäß dem Oberbegriff von Anspruch 1. The invention relates to a method for controlling occupant protection devices of a motor vehicle according to the preamble of
Aus einer Reihe von Schriften, bspw. der
Gemäß der
Ziel ist dabei, aufgrund der bereits erkannten Gefahrensituation durch Herabsetzen der Auslöseschwelle eine frühzeitigere Auslösung zu ermöglichen. Nachteilig dabei ist, dass diese Ansätze eigentlich nur in besonderen Extremsituationen zum Einsatz kommen und aufgrund der Herabsetzung der Auslöseschwelle auch bei insgesamt schwachem Crashverlauf, also letztlich auch bei eigentlichen Nicht-Auslösefällen zur Auslösung führen können, sofern denn die anderen Bedingungen, also Notbrems- oder ESP-Eingriff eintreten. Optimaler Weise sorgen diese Maßnahmen aber ja gerade dazu, die Crashschwere so weit zu reduzieren.The goal here is to enable earlier triggering due to the already recognized danger situation by reducing the triggering threshold. The disadvantage here is that these approaches are actually used only in special extreme situations and due to the reduction of the triggering threshold even with a total weak crash course, so ultimately lead to actual non-triggering cases to trigger, if then the other conditions, ie emergency braking or ESP intervention occur. Optimally, however, these measures ensure that the crash severity is reduced so far.
Zudem wird in der
Es wird vorgeschlagen, die Translationsbeschleunigung des Fahrzeugs bei der Auswertung des Drehratensensorsignals zu berücksichtigen, insbesondere die erfasste Drehrate zumindest für ein vorgegebenes Zeitintervall zu ignorieren, wenn aufgrund der erfassten Translationsbeschleunigung vom Vorliegen einer Crash-Situation ausgegangen wird, um zu vermeiden, dass Störungen in der Funktionsweise des Drehratensensors, die durch extreme Translationsbeschleunigungen verursacht worden sind, zum fälschlichen Auslösen von Rückhaltemitteln für einen Überrollvorgang führen.It is proposed to take into account the translation acceleration of the vehicle in the evaluation of the rotation rate sensor signal, in particular to ignore the detected rotation rate at least for a predetermined time interval, if it is assumed due to the detected translation acceleration from the presence of a crash situation, to avoid that disturbances in the Operation of the rotation rate sensor, which have been caused by extreme translational accelerations, lead to the false triggering of retaining means for a rollover process.
Die
Die Aufgabe der vorliegenden Erfindung ist es, ein Verfahren zur Steuerung von Insassenschutzeinrichtungen eines Kraftfahrzeugs anzugeben, bei welchem die Entscheidungssicherheit zur Auslösung weiter erhöht wird. Diese Aufgabe wird durch die Merkmale der unabhängigen Ansprüche gelöst. Vorteilhafte Weiterbildungen der Erfindung ergeben sich aus den Unteransprüchen, wobei auch Kombinationen und Weiterbildungen einzelner Merkmale miteinander denkbar sind.The object of the present invention is to provide a method for controlling occupant protection devices of a motor vehicle, in which the decision reliability for triggering is further increased. This object is solved by the features of the independent claims. Advantageous developments of the invention will become apparent from the dependent claims, and combinations and developments of individual features are conceivable with each other.
Ein wesentlicher Gedanke der Erfindung besteht darin, dass ein Bremseingriff vor und während einer Kollision das Signal des Aufprallsensors, also insbesondere eines Beschleunigungssensors zwangsläufig beeinflusst. Zwar gibt es die Möglichkeit, durch Tiefpassfilterung, Rechenstart erst ab einer Grundschwelle oder generellem Ignorieren des unteren Amplitudenbereichs diesen Einfluss in der sensorinternen oder steuergeräteseitigen Auswertung zu reduzieren, doch schwächt dies aber auch die Empfindlichkeit des Gesamtalgorithmus. An essential idea of the invention is that a braking intervention before and during a collision inevitably affects the signal of the impact sensor, that is, in particular of an acceleration sensor. Although there is the possibility to reduce this influence in the sensor-internal or ECU-side evaluation by low-pass filtering, computational start only from a basic threshold or general ignoring the lower amplitude range, but this also weakens the sensitivity of the overall algorithm.
Entsprechend werden in heutigen Insassenschutzeinrichtungen zumindest einzelne Parameter laufend auch während des Fahrtbetriebs auf Basis der Rohbeschleunigung mit berechnet.Accordingly, in today's occupant protection devices, at least individual parameters are also continuously calculated during the drive operation on the basis of the raw acceleration.
Entsprechend wird vorgeschlagen, zumindest eines der Signale von dem zumindest einen Aufprallsensors oder zumindest ein daraus abgeleitetes Signal in Abhängigkeit von dem Bremssignal anzupassen und das so angepasste Signal der weiteren Auswertung zuzuführen wird. Im Gegensatz zu einer Korrektur einer Auslöseschwelle wird also das Signal angepasst, was insbesondere dann einen signifikanten Unterschied macht, wenn das Signal vor einem Schwellenvergleich noch durch Rechenschritte, bspw. Filter und Integrationsstufen weiterverarbeitet wird.Accordingly, it is proposed to adapt at least one of the signals from the at least one impact sensor or at least one signal derived therefrom as a function of the braking signal and to supply the signal thus adapted to the further evaluation. In contrast to a correction of a triggering threshold so that Adjusted signal, which makes a significant difference in particular, if the signal before a threshold comparison is still processed by computational steps, for example. Filter and integration levels.
So wird in einer ersten Ausgestaltung als Signal aus einem Beschleunigungssignal über ein gleitendes Zeitfenster zumindest während der Fahrt permanent ein Integrationswert bestimmt und zumindest bei Überschreiten einer Schwelle für ein vorgegebenes Signal dieser Integrationswert in Abhängigkeit vom Bremssignal angepasst und so angepasst der weiteren Auswertung zugeführt.Thus, in a first refinement, an integration value is permanently determined as a signal from an acceleration signal over a sliding time window at least during travel, and at least when a threshold for a given signal is exceeded, this integration value is adjusted as a function of the brake signal and adapted for further evaluation.
Aus dem Bremssignal wird vorzugsweise neben der Stärke des Bremseingriffs des aktuellen Bremseingriffs auch ein Wert für die Stärke des Bremseingriffs innerhalb eines vorgegebenen, zurückliegenden Zeitraums berücksichtigt.From the brake signal, a value for the strength of the braking intervention within a predetermined, past period is preferably taken into account in addition to the strength of the braking intervention of the current braking intervention.
Dadurch wird vorzugsweise der Einfluss des vorangehenden Eingriffs des Fahrers oder eben auch der automatische Eingriff eines Fahrerassistenzsystems, insbesondere Bremseingriffs auf das Signal des Aufprallsensors, insbesondere der Inertialsensoren korrigiert.As a result, the influence of the driver's previous intervention or even the automatic intervention of a driver assistance system, in particular braking intervention, on the signal of the impact sensor, in particular of the inertial sensors, is preferably corrected.
Zudem wird vorzugsweise auch aus zumindest einem Beschleunigungssignal eine bereits erfolgte Insassenverlagerung abgeleitet, wobei anhand des Bremssignals berücksichtigt und entsprechend korrigiert wird, wenn bzw. inwieweit diese Insassenverlagerung auf einem Bremseingriff des Fahrers oder Fahrerassistenzsystems beruht.In addition, it is also preferable to derive an occupant shift that has already taken place from at least one acceleration signal, taking account of the brake signal and correspondingly correcting it when or to what extent this occupant displacement is based on a braking intervention of the driver or driver assistance system.
Die Erfindung wird nachfolgend noch anhand zweier Ausführungsbeispiele und Figuren näher erläutert. Es zeigen:The invention will be explained in more detail below with reference to two embodiments and figures. Show it:
Bremseingriffsbrake intervention
S2 skizziert dabei den Verlauf ohne Bremseingriff und S1 den Verlauf mit Bremseingriff, aber ohne Korrektur. Deutlich ist zu erkennen, dass das Zeitfensterintegralsignal bei S1 bereits zum Zeitpunkt 0 des Beginns des Aufpralls durch den Bremseingriff signifikant vorgefüllt ist. Der resultierende weitere Geschwindigkeitsabbau würde den Auslöseschwellwert T damit überschreiten. Deshalb wird in diesem Ausführungsbeispiel bei einem erkannten Crash-Algoeinstieg, also bspw. Überschreiten einer Startschwelle durch das Beschleunigungssignal, die bisher im Fenster integrierte Geschwindigkeit als Korrekturwert bewertet und zumindest anteilig abgezogen (vgl. S3 zu Zeitpunkt 0). Weiterhin wird zudem vorzugsweise der Korrekturwert mit steigender Crashdauer reduziert. Dies geschieht durch Abzug derjenigen Beschleunigungswerte aus dem Zeitfensterintegralsignal, welche das Integrationsfenster verlassen.S2 outlines the course without braking intervention and S1 the course with braking intervention, but without correction. It can clearly be seen that the time window integral signal at S1 is already prefilled significantly at the
Diese Korrektur geschieht nur bei einer Bremsung. Die Beschleunigungswerte während der Bremsung kann man direkt vom Bremssteuergerät über einen Bus erhalten oder über low-g Sensorik messen. This correction only happens during braking. The acceleration values during braking can be obtained directly from the brake control unit via a bus or measured via low-g sensors.
Auch hier kann durch Berücksichtigung eines Bremseingriffs eine Verbesserung erreicht werden. Die Vorverlagerung wird beispielsweise aus einer Doppelintegration der Beschleunigung abgeleitet und hat natürlich bei einem Bremseingriff vor dem eigentlichen Aufprall bereits zu einer gewissen Vorverlagerung geführt. Startet man die Auswertung erst mit Crashbeginn, würde gemäß x2 später die Schwelle Tx erreicht als mit Berücksichtigung der bereits erfolgten Vorverlagerung in x1.Here too, an improvement can be achieved by taking into account a braking intervention. The forward displacement is derived for example from a double integration of acceleration and has of course already led to a certain forward displacement at a braking intervention before the actual impact. If one starts the evaluation only with the beginning of the crash, the threshold Tx would be reached later according to x2 than with consideration of the already preceding forward displacement in x1.
ZITATE ENTHALTEN IN DER BESCHREIBUNG QUOTES INCLUDE IN THE DESCRIPTION
Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.
Zitierte PatentliteraturCited patent literature
- DE 102006051787 A1 [0002, 0002, 0002] DE 102006051787 A1 [0002, 0002, 0002]
- DE 10317640 A1 [0003] DE 10317640 A1 [0003]
- DE 10118062 A1 [0005] DE 10118062 A1 [0005]
- DE 102006045682 B3 [0007] DE 102006045682 B3 [0007]
Claims (6)
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DE102015220531.2A DE102015220531B4 (en) | 2015-10-21 | 2015-10-21 | Method for controlling occupant protection devices of a motor vehicle as a function of a brake signal |
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DE102015220531.2A DE102015220531B4 (en) | 2015-10-21 | 2015-10-21 | Method for controlling occupant protection devices of a motor vehicle as a function of a brake signal |
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DE102015220531B4 DE102015220531B4 (en) | 2024-07-04 |
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Citations (10)
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---|---|---|---|---|
DE4330486A1 (en) * | 1993-09-09 | 1995-03-16 | Daimler Benz Ag | Method for deploying an airbag in a motor vehicle |
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DE10118062A1 (en) | 2001-04-11 | 2002-10-24 | Bosch Gmbh Robert | Method for recognizing rollover processes in a motor vehicle |
DE10317640A1 (en) | 2003-04-17 | 2004-11-04 | Robert Bosch Gmbh | Device for controlling restraint devices |
DE10360769A1 (en) * | 2003-12-23 | 2005-07-28 | Conti Temic Microelectronic Gmbh | Triggering at least one vehicle occupant protection device involves varying triggering threshold depending on vehicle speed if measured speed is checked using further available speed-relevant information and threshold change is enabled |
DE102006045682B3 (en) | 2006-09-27 | 2008-02-07 | Siemens Ag | Passenger protective system releasing method for e.g. minivan, involves raising and lowering criterion during travel on slop on detecting impact in which distance between threshold value and variable is reduced and increased respectively |
DE102006054092B3 (en) * | 2006-11-16 | 2008-04-17 | Siemens Ag | Device for releasing occupants-protection system in vehicle, particularly active headrest, has acceleration sensor for detecting acceleration signal of vehicle and corrective element for continuous zero correction |
DE102006051787A1 (en) | 2006-11-03 | 2008-05-08 | Daimler Ag | A method for controlling occupant protection means in a vehicle having a predictive environment detection unit |
DE102010009667A1 (en) * | 2010-02-27 | 2011-09-01 | Audi Ag | A method for determining a severity of a collision of a motor vehicle with an object |
-
2015
- 2015-10-21 DE DE102015220531.2A patent/DE102015220531B4/en active Active
Patent Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4330486A1 (en) * | 1993-09-09 | 1995-03-16 | Daimler Benz Ag | Method for deploying an airbag in a motor vehicle |
DE4334671A1 (en) * | 1993-10-12 | 1995-04-13 | Bosch Gmbh Robert | Restraining system |
DE4335991A1 (en) * | 1993-10-21 | 1995-04-27 | Telefunken Microelectron | Tripping device for vehicle security systems |
DE10118062A1 (en) | 2001-04-11 | 2002-10-24 | Bosch Gmbh Robert | Method for recognizing rollover processes in a motor vehicle |
DE10317640A1 (en) | 2003-04-17 | 2004-11-04 | Robert Bosch Gmbh | Device for controlling restraint devices |
DE10360769A1 (en) * | 2003-12-23 | 2005-07-28 | Conti Temic Microelectronic Gmbh | Triggering at least one vehicle occupant protection device involves varying triggering threshold depending on vehicle speed if measured speed is checked using further available speed-relevant information and threshold change is enabled |
DE102006045682B3 (en) | 2006-09-27 | 2008-02-07 | Siemens Ag | Passenger protective system releasing method for e.g. minivan, involves raising and lowering criterion during travel on slop on detecting impact in which distance between threshold value and variable is reduced and increased respectively |
DE102006051787A1 (en) | 2006-11-03 | 2008-05-08 | Daimler Ag | A method for controlling occupant protection means in a vehicle having a predictive environment detection unit |
DE102006054092B3 (en) * | 2006-11-16 | 2008-04-17 | Siemens Ag | Device for releasing occupants-protection system in vehicle, particularly active headrest, has acceleration sensor for detecting acceleration signal of vehicle and corrective element for continuous zero correction |
DE102010009667A1 (en) * | 2010-02-27 | 2011-09-01 | Audi Ag | A method for determining a severity of a collision of a motor vehicle with an object |
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