EP1566505B1 - Security device for a vehicle - Google Patents
Security device for a vehicle Download PDFInfo
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- EP1566505B1 EP1566505B1 EP20050001160 EP05001160A EP1566505B1 EP 1566505 B1 EP1566505 B1 EP 1566505B1 EP 20050001160 EP20050001160 EP 20050001160 EP 05001160 A EP05001160 A EP 05001160A EP 1566505 B1 EP1566505 B1 EP 1566505B1
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- Prior art keywords
- safety
- safety device
- vehicle
- state variable
- doors
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B77/00—Vehicle locks characterised by special functions or purposes
- E05B77/02—Vehicle locks characterised by special functions or purposes for accident situations
- E05B77/12—Automatic locking or unlocking at the moment of collision
Definitions
- the invention relates to a safety device for a motor vehicle with at least one control unit for a door unlocking system over which the vehicle doors are automatically unlocked when needed, which control unit is designed such that the doors at a detected exceeding of a safety threshold or a detected hazard situation separately without compelling actuation unlocked by another active or passive security system.
- the locking of the doors of motor vehicles while driving is usually carried out by an autolock function, by which the doors are automatically locked at a certain speed, when engaging a gear, when braking or when switching on the ignition.
- the doors can be locked by a manual locking device such as a button in the interior or a door knob to prevent unwanted opening of the doors from the outside.
- a passive safety system such as Airbag or belt tensioner by the control unit unlocks the doors to allow the rescue of the vehicle occupants from the outside.
- a door unlocking takes place only when an airbag or other passive safety system such as a belt tensioner was triggered.
- a safety device for a motor vehicle having the features of the preamble of claim 1 is known from DE 195 48 562 A1 known.
- this solution causes considerable design effort.
- she suffers from the mentioned disadvantage that the doors are not automatically opened in light accidents.
- a door lock with a fuse will be in the DE 102 08 195 A1 described. It is an additional security device that prevents the door opening in unlocked position even when unlocked door lock and can be used for example as a child safety lock. For this backup, a triggering device is provided which cancels the fuse in an accident above a characteristic threshold or switches to the release position.
- the US 5,574,315 relates to a method and apparatus enabling emergency activated control of an electric door lock in a motor vehicle.
- an emergency detector is provided which outputs a corresponding signal in the event of an accident, so that, for example, the doors are unlocked or the window is cranked down.
- the invention has for its object to provide a safety device for a motor vehicle, which allows the opening of the doors from the outside after an accident, even if no airbag deployment or belt tensioner release has taken place.
- a safety device for a motor vehicle of the type mentioned that the control device is designed so that when detected exceeding a safety threshold or in the detected danger situation, the vehicle doors in a detected front or rear impact, especially with Airbag deployment, immediately and otherwise unlocked after the lapse of a specified or definable delay time.
- the door lock is opened independently of the triggering of another safety system, for example an airbag system.
- another safety system for example an airbag system.
- This makes it possible to open the vehicle doors even with less severe crashes or accidents. It is essential that the unlocking of the doors takes place completely independently of any eventual airbag deployment or the activation of a belt tensioner system.
- sensors monitor the accelerations of the vehicle in several directions or around different axes. If a certain limit is exceeded or a certain time lasts, it can be concluded that a collision has occurred and the airbag is triggered.
- the door unlocking by the safety device according to the invention is not based on this limit value for the collision event, but a separate safety threshold is set, which is independent of the limit value for the airbag deployment or the triggering of a belt tensioner.
- the control unit is designed such that the vehicle doors are unlocked immediately or after the lapse of a defined or definable delay time. This prevents the doors from being opened during the accident due to external influences.
- control unit unlocks the doors in a front or rear impact without delay.
- front crash operations with a considerable degree of destruction.
- the excess of the safety threshold value can be determined by comparing with a state variable of the vehicle or a value derived therefrom, which can be supplied to the control device by an active or passive safety system. It is advantageous that the corresponding state variable is already stored in a control device anyway, so that no additional hardware for detecting the state variable is required.
- the state variable may be a measured value detected by a sensor or a variable derived therefrom.
- the state variable is an acceleration in a certain direction, in particular in the transverse or longitudinal direction of the vehicle. If the lateral acceleration is used as a state variable, accidents with rollover and rollover events can be detected, so that even in these cases the doors are unlocked.
- the state quantity is a rotation speed which is detected by a rotation rate sensor.
- the state quantity that is compared to the safety threshold may be a pressure limit sensed by a pressure sensor of the vehicle.
- each state variable is assigned to a security system.
- a security system For example, it is possible, for example, to monitor the lateral acceleration, the value of which is supplied by the airbag system, at the same time the distance to an adjacent or approaching vehicle can be monitored, which is supplied by a camera system or a radar system of the vehicle. In this way, several safety thresholds are monitored in parallel.
- a driving state in particular a recognized critical driving state as a state variable.
- This procedure is particularly useful in active safety systems that constantly monitor the driving condition and intervene in the event of imminent danger, for example by a braking operation.
- the critical driving state can be compared with the corresponding safety threshold for the door opening system, which is independent of the triggering threshold of the active safety system, so that the doors are unlocked if the safety threshold value is exceeded.
- the door unlocking system can be triggered depending on the situation before, simultaneously or after the active safety system.
- the state variable is a signal of an airbag system and / or belt tensioner system and / or ESP system and / or ASR system and / or ABS system or a signal derived therefrom. These systems are available anyway, so that the signals and information recorded there can be used.
- the delay time can be approximately 3 to 7 seconds, preferably 4 to 6 seconds, more preferably 5 seconds. After the lapse of this delay time, accidents with flashovers are also typically over. After expiration of the time constant, the doors are unlocked to allow access to the vehicle occupants from the outside. Before the end of the movement, the doors remain closed within the defined time window in order to prevent inadvertent opening of the door.
- a further improvement of the invention can be achieved if the control device of the safety device is designed such that the doors are initially locked when the safety threshold value is exceeded. This process can be realized by a lock signal, which is sent by the control unit via a bus line to the door locks. This ensures that the doors are locked at the beginning of the collision, if an excess of the safety threshold has been detected to prevent unwanted door opening due to external influences during the accident.
- the invention also relates to a motor vehicle.
- the motor vehicle has a safety device of the type described.
- the figure illustrates the operation of the safety device according to the invention in the form of a flow chart.
- the door opening and locking control is performed by an algorithm implemented in an airbag control apparatus in this embodiment. After the start of the algorithm 1 is first checked in step 2, whether the current, supplied by the airbag control unit sensor signal, which serves as a state variable, exceeds the door opening threshold.
- the door opening threshold is a safety threshold associated with the airbag control unit, which is a lateral acceleration limit.
- the interrogation loop is updated with an updated state variable, i. an updated acceleration value, go through again. This is always the case during normal driving, since the accelerations occurring there are typically less than 1 g.
- the safety threshold for the door opening in this embodiment has the value 4 g. If the lateral acceleration of the vehicle exceeds 4 g, the control unit detects that an accident involving a rollover may be imminent.
- the function of the safety device does not depend on whether the airbag is actually deployed because the safety device operates independently of the airbag safety system.
- step 3 the doors are locked so that they can not unintentionally open themselves during the impact process due to external influences if it is not known at start 1 of the algorithm whether the doors are currently locked or unlocked. It is therefore necessary to send the lock signal to the door lock of the vehicle in step 3, the control signals for locking and unlocking the doors being transmitted via bus lines of the vehicle such as the CAN bus or direct connections such as cables.
- step 6 the doors are unlocked. If it has been determined in query 4 that the airbag has been triggered by a front or rear crash, a branch is made directly to step 6 in order to unlock the doors.
- the following query 7 is used to distinguish accidents with and without airbag deployment. If no airbag has been deployed, there is usually a minor accident, such as a crash barrier crash. In these cases, the algorithm is terminated in step 9. The door opening made by the driver is not perceived as undesirable.
- the controller sends one or more signals over the appropriate bus lines, which, as shown in step 8, can turn off the engine, stop the fuel supply, and turn on the hazard warning lights.
- This safety device can be implemented comparatively easily by modifications of the software of the passive safety systems (airbag, belt) or the control units of the active safety systems (ESP, ASR, ABS).
Description
Die Erfindung betrifft eine Sicherheitseinrichtung für ein Kraftfahrzeug mit wenigstens einem Steuergerät für ein Türentriegelungssystem, über das die Fahrzeugtüren bei Bedarf automatisch entriegelbar sind, welches Steuergerät derart ausgebildet ist, dass die Türen bei einer erfassten Überschreitung eines Sicherheitsschwellwerts oder bei einer erkannten Gefahrensituation separat ohne zwingende Betätigung eines anderen aktiven oder passiven Sicherheitssystems entriegelbar sind.The invention relates to a safety device for a motor vehicle with at least one control unit for a door unlocking system over which the vehicle doors are automatically unlocked when needed, which control unit is designed such that the doors at a detected exceeding of a safety threshold or a detected hazard situation separately without compelling actuation unlocked by another active or passive security system.
Das Verriegeln der Türen von Kraftfahrzeugen während der Fahrt erfolgt üblicherweise durch eine Autolock-Funktion, durch die die Türen bei einer bestimmten Fahrgeschwindigkeit, beim Einlegen einer Fahrstufe, beim Bremsen oder beim Einschalten der Zündung automatisch verriegelt werden. Daneben können die Türen durch eine manuelle Verriegelungsvorrichtung wie einen Taster im Innenraum oder einen Türknopf verriegelt werden, um ein unerwünschtes Öffnen der Türen von außen zu verhindern. Bei einem Unfall werden bei der Auslösung eines passiven Sicherheitssystems, wie z.B. Airbag oder Gurtstraffer durch das Steuergerät die Türen entriegelt, um die Rettung der Fahrzeuginsassen von außen zu ermöglichen. Eine Türentriegelung findet jedoch nur dann statt, wenn ein Airbag oder ein anderes passives Sicherheitssystem wie ein Gurtstraffer ausgelöst wurde. Bei leichteren Unfällen werden die Türen hingegen nicht geöffnet, da das Airbagsteuergerät den Unfall nicht als schwerwiegend erkennt. Allerdings können auch derartige leichtere Unfälle dazu führen, dass Fahrzeuginsassen bewusstlos werden oder unter Schock stehen. In diesem Fall besteht die Möglichkeit, dass die Helfer wegen der verriegelten Türen nicht sofort in das Fahrzeug gelangen können.The locking of the doors of motor vehicles while driving is usually carried out by an autolock function, by which the doors are automatically locked at a certain speed, when engaging a gear, when braking or when switching on the ignition. In addition, the doors can be locked by a manual locking device such as a button in the interior or a door knob to prevent unwanted opening of the doors from the outside. In the event of an accident, when a passive safety system is triggered, such as Airbag or belt tensioner by the control unit unlocks the doors to allow the rescue of the vehicle occupants from the outside. However, a door unlocking takes place only when an airbag or other passive safety system such as a belt tensioner was triggered. In the case of minor accidents, on the other hand, the doors are not opened because the airbag control unit does not recognize the accident as serious. However, even such lighter accidents can cause vehicle occupants to become unconscious or in shock. In this case, there is the possibility that the helpers because of the locked doors can not get into the vehicle immediately.
Eine Sicherheitseinrichtung für ein Kraftfahrzeug mit den Merkmalen des Oberbegriffs des Anspruchs 1 ist aus der
Ein Türschloss mit einer Sicherung wird in der
Die
Der Erfindung liegt die Aufgabe zugrunde, eine Sicherheitseinrichtung für ein Kraftfahrzeug anzugeben, die nach einem Unfall das Öffnen der Türen von außen ermöglicht, auch wenn keine Airbagauslösung oder Gurtstrafferauslösung stattgefunden hat.The invention has for its object to provide a safety device for a motor vehicle, which allows the opening of the doors from the outside after an accident, even if no airbag deployment or belt tensioner release has taken place.
Zur Lösung dieser Aufgabe ist bei einer Sicherheitseinrichtung für ein Kraftfahrzeug der eingangs genannten Art erfindungsgemäß vorgesehen, dass das Steuergerät so ausgebildet ist, dass bei der erfassten Überschreitung eines Sicherheitsschwellwerts oder bei der erkannten Gefahrensituation, die Fahrzeugtüren bei einem erkannten Front- oder Heckaufprall, insbesondere mit Airbagauslösung, sofort und andernfalls nach dem Verstreichen einer festgelegten oder festlegbaren Verzögerungszeit entriegelt werden.To solve this problem is provided according to the invention in a safety device for a motor vehicle of the type mentioned that the control device is designed so that when detected exceeding a safety threshold or in the detected danger situation, the vehicle doors in a detected front or rear impact, especially with Airbag deployment, immediately and otherwise unlocked after the lapse of a specified or definable delay time.
Erfindungsgemäß erfolgt ein Öffnen der Türverriegelung unabhängig von der Auslösung eines anderen Sicherheitssystems, beispielsweise eines Airbagsystems. Dadurch ist es möglich, die Fahrzeugtüren auch bei weniger schweren Aufprallvorgängen oder Unfällen zu öffnen. Wesentlich ist dabei, dass die Entriegelung der Türen vollkommen unabhängig von einer eventuellen erfolgenden Airbagauslösung oder der Aktivierung eines Gurtstraffersystems stattfindet. Bei Airbagsystemen werden durch Sensoren die Beschleunigungen des Fahrzeugs in mehreren Richtungen bzw. um verschiedene Achsen überwacht. Wenn ein bestimmter Grenzwert überschritten wird oder eine bestimmte Zeit andauert, kann daraus geschlossen werden, dass eine Kollision stattgefunden hat und der Airbag wird ausgelöst. Die Türentriegelung durch die erfindungsgemäße Sicherheitseinrichtung beruht nicht auf diesem Grenzwert für das Kollisionsereignis, sondern es wird ein eigener Sicherheitsschwellwert festgelegt, der unabhängig von dem Grenzwert für die Airbagauslösung oder der Auslösung eines Gurtstraffers ist.According to the invention, the door lock is opened independently of the triggering of another safety system, for example an airbag system. This makes it possible to open the vehicle doors even with less severe crashes or accidents. It is essential that the unlocking of the doors takes place completely independently of any eventual airbag deployment or the activation of a belt tensioner system. In airbag systems, sensors monitor the accelerations of the vehicle in several directions or around different axes. If a certain limit is exceeded or a certain time lasts, it can be concluded that a collision has occurred and the airbag is triggered. The door unlocking by the safety device according to the invention is not based on this limit value for the collision event, but a separate safety threshold is set, which is independent of the limit value for the airbag deployment or the triggering of a belt tensioner.
Mit besonderem Vorteil können durch die Überwachung des Sicherheitsschwellwerts Unfälle wie eine Kollision auf eine Leitplanke oder ein Überschlag ohne harten Kontakt erkannt werden. Da in diesen Fällen kein harter Kontakt vorliegt, wird kein Airbag oder Gurtstraffer ausgelöst und es kommt bei der herkömmlichen Sicherheitseinrichtung nicht zu einer Türentriegelung. Erfindungsgemäß erfolgt jedoch auch bei diesen vergleichsweise weniger schwerwiegenden Unfällen eine Türentriegelung, da der Sicherheitsschwellwert überschritten worden ist, so dass Helfer die Türen von außen problemlos öffnen können.With particular advantage, by monitoring the safety threshold, accidents such as a crash on a crash barrier or a rollover without hard contact can be detected. Since there is no hard contact in these cases, no airbag or belt tensioner is triggered and it does not come in the conventional safety device to a door unlocking. According to the invention, however, even with these comparatively less serious accidents door unlocking, since the safety threshold has been exceeded, so that helpers can open the doors from the outside easily.
Das Steuergerät ist so ausgebildet, dass die Fahrzeugtüren sofort oder nach dem Verstreichen einer festgelegten oder festlegbaren Verzögerungszeit entriegelt werden. Dadurch wird verhindert, dass die Türen während des Unfallablaufs durch äußere Einflüsse geöffnet werden.The control unit is designed such that the vehicle doors are unlocked immediately or after the lapse of a defined or definable delay time. This prevents the doors from being opened during the accident due to external influences.
Es ist vorgesehen, dass das Steuergerät die Türen bei einem Front- oder Heckaufprall ohne Verzögerungszeit entriegelt. Hier ist es sinnvoll, die Türen sofort zu entriegeln, da in diesen Unfallkonstellationen ein unbeabsichtigtes Türöffnen von außen unwahrscheinlich ist. Dasselbe gilt für Frontcrashvorgänge mit einem erheblichen Zerstörungsgrad.It is envisaged that the control unit unlocks the doors in a front or rear impact without delay. Here it makes sense to unlock the doors immediately, as in these accident constellations an unintentional Door opening from the outside is unlikely. The same applies to front crash operations with a considerable degree of destruction.
Es ist besonders zweckmäßig, wenn die Überschreitung des Sicherheitsschwellwerts durch Vergleichen mit einer Zustandsgröße des Fahrzeugs oder einem daraus abgeleiteten Wert feststellbar ist, die bzw. der dem Steuergerät von einem aktiven oder passiven Sicherheitssystem zuführbar ist. Dabei ist es von Vorteil, dass die entsprechende Zustandsgröße ohnehin bereits in einem Steuergerät gespeichert ist, so dass keine zusätzliche Hardware zur Erfassung der Zustandsgröße erforderlich ist. Die Zustandsgröße kann ein durch einen Sensor erfasster Messwert oder eine daraus abgeleitete Größe sein.It is particularly expedient if the excess of the safety threshold value can be determined by comparing with a state variable of the vehicle or a value derived therefrom, which can be supplied to the control device by an active or passive safety system. It is advantageous that the corresponding state variable is already stored in a control device anyway, so that no additional hardware for detecting the state variable is required. The state variable may be a measured value detected by a sensor or a variable derived therefrom.
In weiterer Ausgestaltung der Erfindung kann es vorgesehen sein, dass die Zustandsgröße eine Beschleunigung in einer bestimmten Richtung, insbesondere in Quer- oder Längsrichtung des Fahrzeugs ist. Wenn die Querbeschleunigung als Zustandsgröße verwendet wird, können Unfälle mit Überschlag- und Überrollvorgängen erkannt werden, so dass auch in diesen Fällen die Türen entriegelt werden.In a further embodiment of the invention, it may be provided that the state variable is an acceleration in a certain direction, in particular in the transverse or longitudinal direction of the vehicle. If the lateral acceleration is used as a state variable, accidents with rollover and rollover events can be detected, so that even in these cases the doors are unlocked.
Es ist auch möglich, dass die Zustandsgröße eine Drehgeschwindigkeit ist, die von einem Drehratensensor erfasst wird. Ferner kann es sich bei der Zustandsgröße, die mit dem Sicherheitsschwellwert verglichen wird, um einen Druckgrenzwert handeln, der durch einen Drucksensor des Fahrzeugs erfasst wird.It is also possible that the state quantity is a rotation speed which is detected by a rotation rate sensor. Further, the state quantity that is compared to the safety threshold may be a pressure limit sensed by a pressure sensor of the vehicle.
Als weitere Alternative besteht die Möglichkeit, den Abstand zu einem anderen Fahrzeug und/oder ein von einer fahrzeugeigenen Kamera oder einem Radarsystem geliefertes Signal als Zustandsgröße zu verwenden. Diese Informationen werden von anderen Sicherheitssystem des Fahrzeugs geliefert und mit dem jeweiligen Sicherheitsschwellwert verglichen.As a further alternative, it is possible to use the distance to another vehicle and / or a signal supplied by an on-board camera or a radar system as a state variable. This information is provided by the vehicle's other security system and compared to its security threshold.
Gemäß einer Weiterbildung der Erfindung kann es vorgesehen sein, die Überschreitung mehrerer Sicherheitsschwellwerte durch Vergleichen mit jeweils einer zugeordneten Zustandsgröße zu überwachen, wobei jede Zustandsgröße einem Sicherheitssystem zugeordnet ist. Es ist also beispielsweise möglich, die Querbeschleunigung zu überwachen, deren Wert vom Airbagsystem geliefert wird, gleichzeitig kann der Abstand zu einem benachbarten oder sich nähernden Fahrzeug überwacht werden, der von einem Kamerasystem oder einem Radarsystem des Fahrzeugs geliefert wird. Auf diese Weise werden mehrere Sicherheitsschwellwerte parallel überwacht.According to one embodiment of the invention, it may be provided to monitor the exceeding of several safety thresholds by comparing each with an associated state variable, each state variable is assigned to a security system. Thus, it is possible, for example, to monitor the lateral acceleration, the value of which is supplied by the airbag system, at the same time the distance to an adjacent or approaching vehicle can be monitored, which is supplied by a camera system or a radar system of the vehicle. In this way, several safety thresholds are monitored in parallel.
Als weitere Alternative ist es möglich, einen Fahrzustand, insbesondere einen erkannten kritischen Fahrzustand als Zustandsgröße zu verwenden. Dieses Vorgehen ist insbesondere bei aktiven Sicherheitssystemen sinnvoll, die den Fahrzustand laufend überwachen und bei einer drohenden Gefahr eingreifen, beispielsweise durch einen Bremsvorgang. Unabhängig von dem Eingreifen des aktiven Sicherheitssystems kann erfindungsgemäß der kritische Fahrzustand mit dem entsprechenden Sicherheitsschwellwert für das Türöffnungssystem, der unabhängig von der Auslöseschwelle des aktiven Sicherheitssystems ist, verglichen werden, so dass bei Überschreitung des Sicherheitsschwellwerts die Türen entriegelt werden. Das Türentriegelungssystem kann dabei situationsabhängig vor, gleichzeitig oder nach dem aktiven Sicherheitssystem ausgelöst werden.As a further alternative, it is possible to use a driving state, in particular a recognized critical driving state as a state variable. This procedure is particularly useful in active safety systems that constantly monitor the driving condition and intervene in the event of imminent danger, for example by a braking operation. Independently of the intervention of the active safety system, according to the invention, the critical driving state can be compared with the corresponding safety threshold for the door opening system, which is independent of the triggering threshold of the active safety system, so that the doors are unlocked if the safety threshold value is exceeded. The door unlocking system can be triggered depending on the situation before, simultaneously or after the active safety system.
Besonders vorteilhaft ist es, wenn die Zustandsgröße ein Signal eines Airbagsystems und/oder Gurtstraffersystems und/oder ESP-Systems und/oder ASR-Systems und/oder ABS-Systems oder ein daraus abgeleitetes Signal ist. Diese Systeme sind ohnehin vorhanden, so dass die dort erfassten Signale und Informationen genutzt werden können.It is particularly advantageous if the state variable is a signal of an airbag system and / or belt tensioner system and / or ESP system and / or ASR system and / or ABS system or a signal derived therefrom. These systems are available anyway, so that the signals and information recorded there can be used.
Bei der erfindungsgemäßen Sicherheitseinrichtung kann die Verzögerungszeit näherungsweise 3 bis 7 Sekunden, vorzugsweise 4 bis 6 Sekunden, weiter vorzugsweise 5 Sekunden betragen. Nach dem Verstreichen dieser Verzögerungszeit sind auch Unfälle mit Überschlägen typischerweise beendet. Nach Ablauf der Zeitkonstante werden die Türen entriegelt, um den Zugang zu den Fahrzeuginsassen von außen zu ermöglichen. Vor dem Ende des Bewegungsablaufs bleiben die Türen innerhalb des definierten Zeitfensters verschlossen, um eine unbeabsichtigte Türöffnung zu verhindern.In the safety device according to the invention, the delay time can be approximately 3 to 7 seconds, preferably 4 to 6 seconds, more preferably 5 seconds. After the lapse of this delay time, accidents with flashovers are also typically over. After expiration of the time constant, the doors are unlocked to allow access to the vehicle occupants from the outside. Before the end of the movement, the doors remain closed within the defined time window in order to prevent inadvertent opening of the door.
Eine weitere Verbesserung der Erfindung lässt sich erzielen, wenn das Steuergerät der Sicherheitseinrichtung derart ausgebildet ist, dass die Türen beim Überschreiten des Sicherheitsschwellwerts zunächst verriegelt werden. Dieser Vorgang kann durch ein Verriegelungssignal realisiert werden, das von dem Steuergerät über eine Busleitung an die Türverriegelungen gesendet wird. Dadurch ist sichergestellt, dass die Türen zu Beginn der Kollision verriegelt werden, wenn eine Überschreitung des Sicherheitsschwellwerts erfasst worden ist, um eine unerwünschte Türöffnung durch äußere Einflüsse während des Unfallablaufs zu vermeiden.A further improvement of the invention can be achieved if the control device of the safety device is designed such that the doors are initially locked when the safety threshold value is exceeded. This process can be realized by a lock signal, which is sent by the control unit via a bus line to the door locks. This ensures that the doors are locked at the beginning of the collision, if an excess of the safety threshold has been detected to prevent unwanted door opening due to external influences during the accident.
Die Erfindung betrifft ferner auch ein Kraftfahrzeug. Erfindungsgemäß weist das Kraftfahrzeug eine Sicherheitseinrichtung der beschriebenen Art auf.The invention also relates to a motor vehicle. According to the invention, the motor vehicle has a safety device of the type described.
Weitere Vorteile und Einzelheiten der Erfindung werden anhand eines Ausführungsbeispiels unter Bezugnahme auf die Figur beschrieben.Further advantages and details of the invention will be described with reference to an embodiment with reference to the figure.
Die Figur stellt die Wirkungsweise der erfindungsgemäßen Sicherheitseinrichtung in der Form eines Flussdiagramms dar.The figure illustrates the operation of the safety device according to the invention in the form of a flow chart.
Die Steuerung der Türöffnung und -verriegelung erfolgt durch einen Algorithmus, der bei diesem Ausführungsbeispiel in einem Steuergerät für einen Airbag implementiert ist. Nach dem Start 1 des Algorithmus wird im Schritt 2 zunächst geprüft, ob das aktuelle, vom Airbagsteuergerät gelieferte Sensorsignal, das als Zustandsgröße dient, den Türöffnungsschwellwert überschreitet. Der Türöffnungsschwellwert ist ein Sicherheitsschwellwert, der dem Airbagsteuergerät zugeordnet ist, es handelt sich dabei um einen Grenzwert für die Querbeschleunigung. Daneben existieren weitere Sicherheitsschwellwerte, die dem ESP-, ASR- bzw. dem ABS-System zugeordnet sind und jeweils parallel überwacht werden.The door opening and locking control is performed by an algorithm implemented in an airbag control apparatus in this embodiment. After the start of the algorithm 1 is first checked in step 2, whether the current, supplied by the airbag control unit sensor signal, which serves as a state variable, exceeds the door opening threshold. The door opening threshold is a safety threshold associated with the airbag control unit, which is a lateral acceleration limit. In addition, there are other safety thresholds that are assigned to the ESP, ASR or the ABS system and are monitored in parallel.
Falls die im Schritt 2 dargestellte Bedingung nicht erfüllt ist, wird die Abfrageschleife mit einer aktualisierten Zustandsgröße, d.h. einem aktualisierten Beschleunigungswert, erneut durchlaufen. Dies ist beim normalen Fahrbetrieb immer der Fall, da die dort auftretenden Beschleunigungen typischerweise geringer als 1 g sind. Der Sicherheitsschwellwert für die Türöffnung hat in diesem Ausführungsbeispiel den Wert 4 g. Wenn die Querbeschleunigung des Fahrzeugs 4 g überschreitet, erkennt das Steuergerät, dass möglicherweise ein Unfall mit einem Überschlag droht. Für die Funktion der Sicherheitseinrichtung kommt es nicht darauf an, ob der Airbag tatsächlich ausgelöst wird, da die Sicherheitseinrichtung unabhängig von dem Airbagsicherheitssystem arbeitet.If the condition illustrated in step 2 is not met, the interrogation loop is updated with an updated state variable, i. an updated acceleration value, go through again. This is always the case during normal driving, since the accelerations occurring there are typically less than 1 g. The safety threshold for the door opening in this embodiment has the value 4 g. If the lateral acceleration of the vehicle exceeds 4 g, the control unit detects that an accident involving a rollover may be imminent. The function of the safety device does not depend on whether the airbag is actually deployed because the safety device operates independently of the airbag safety system.
Im Schritt 3 werden die Türen verriegelt, damit diese sich während des Aufprallvorgangs nicht unbeabsichtigt durch äußere Einflüsse öffnen können, wenn es beim Start 1 des Algorithmus nicht bekannt ist, ob die Türen gegenwärtig ver- oder entriegelt sind. Es ist daher erforderlich, das Verriegelungssignal im Schritt 3 an die Türverriegelung des Fahrzeugs zu senden, wobei die Steuersignale zum Ver- und Entriegeln der Türen über Busleitungen des Fahrzeugs wie den CAN-Bus oder direkte Verbindungen wie Kabel übertragen werden.In step 3, the doors are locked so that they can not unintentionally open themselves during the impact process due to external influences if it is not known at start 1 of the algorithm whether the doors are currently locked or unlocked. It is therefore necessary to send the lock signal to the door lock of the vehicle in step 3, the control signals for locking and unlocking the doors being transmitted via bus lines of the vehicle such as the CAN bus or direct connections such as cables.
In der sich daran anschließenden Abfrage 4 wird geprüft, ob es sich um einen Front- oder Heckcrash mit Airbagauslösung handelt. Wenn der Airbag nicht ausgelöst wurde, wird im Schritt 5 die Verzögerungszeit von 5 Sekunden abgewartet, nach der das Fahrzeug üblicherweise zum Stehen gekommen ist. Dabei kann es sich um einen Aufprall mit einer Überrollbewegung, dem sogenannten "Rollover", handeln, bei der der kein Airbag ausgelöst wird. Andererseits könnte es sich auch um einen Seitencrash mit Airbagauslösung handeln. In beiden Fällen werden anschließend im Schritt 6 die Türen entriegelt. Falls bei der Abfrage 4 festgestellt wurde, dass der Airbag durch einen Front- oder Heckcrash ausgelöst wurde, wird direkt zum Schritt 6 verzweigt, um die Türen zu entriegeln.In the subsequent query 4 is checked whether it is a front or rear crash with airbag deployment. If the airbag has not been triggered, the delay time of 5 seconds is waited in
Die darauf folgende Abfrage 7 dient zur Unterscheidung von Unfällen mit und ohne Airbagauslösung. Wenn kein Airbag ausgelöst wurde, liegt zumeist ein weniger schwerer Unfall vor, beispielsweise ein Anprall gegen eine Leitplanke. In diesen Fällen wird der Algorithmus im Schritt 9 beendet. Die vorgenommene Türöffnung wird vom Fahrer dabei nicht als unerwünscht empfunden.The following query 7 is used to distinguish accidents with and without airbag deployment. If no airbag has been deployed, there is usually a minor accident, such as a crash barrier crash. In these cases, the algorithm is terminated in
Andernfalls, wenn der Airbag ausgelöst wurde, werden von dem Steuergerät ein oder mehrere Signale über die entsprechenden Busleitungen gesendet, die, wie im Schritt 8 dargestellt ist, den Motor ausschalten, die Kraftstoffzufuhr stoppen und die Warnblinkanlage einschalten können.Otherwise, when the airbag is deployed, the controller sends one or more signals over the appropriate bus lines, which, as shown in
Diese Sicherheitseinrichtung kann durch Modifikationen der Software des oder der Steuergeräte für die passiven Sicherheitssysteme (Airbag, Gurt) oder der Steuergeräte der aktiven Sicherheitssysteme (ESP, ASR, ABS) vergleichsweise leicht realisiert werden.This safety device can be implemented comparatively easily by modifications of the software of the passive safety systems (airbag, belt) or the control units of the active safety systems (ESP, ASR, ABS).
Claims (11)
- Safety device for a motor vehicle with at least one control unit for a door unlocking system by means of which the doors of the vehicle can be unlocked automatically when required, the control unit being configured so that the doors are independently unlockable, without requiring operation of any other active or passive safety system, upon detection of the overstepping of a safety threshold value or recognition of a dangerous situation,
characterized in that
the control unit is configured so that upon detection of the overstepping of the safety threshold value or recognition of the dangerous situation, the doors of the vehicle are unlocked immediately in the event of a recognized front or rear impact, particularly with airbag actuation, and otherwise after a defined or definable time-lag has elapsed. - Safety device according to Claim 1,
characterized in that
the overstepping of the safety threshold value is ascertainable by comparison with a state variable of the vehicle or a value derivable therefrom that can be fed to the control unit by an active or passive safety system. - Safety device according to Claim 2,
characterized in that
the state variable is an acceleration in a specific direction, in particular the transverse or longitudinal direction of the vehicle. - Safety device according to Claim 2,
characterized in that
the state variable is an angular velocity and/or pressure limit value. - Safety device according to Claim 2,
characterized in that
the state variable is the distance from another vehicle and/or a signal supplied by a camera belonging to the vehicle and/or by a radar system. - Safety device according to Claim 2,
characterized in that '
the state variable is a driving state, in particular a recognized critical driving state. - Safety device according to any one of Claims 2 to 6,
characterized in that
the state variable is a signal of an airbag system and/or seat-belt tightening system and/or ESP system and/or ASR system and/or ABS system, or a signal derived therefrom. - Safety device according to any one of the preceding claims,
characterized in that
the time-lag is approximately 3 to 7 seconds, preferably 4 to 6 seconds, and more preferably 5 seconds. - Safety device according to any one of the preceding claims,
characterized in that
the control unit is configured so that the doors are initially lockable upon detection of the overstepping of the safety threshold value. - Safety device according to any one of the preceding claims,
characterized in that
the at least one control unit is configured for monitoring the overstepping of a plurality of safety threshold values by respective comparison with an assigned state variable, each state variable being assigned to a safety system. - Motor vehicle,
characterized in that
it has a safety device according to any one of Claims 1 to 10.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
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| DE200410008507 DE102004008507B4 (en) | 2004-02-20 | 2004-02-20 | Safety device for a motor vehicle |
| DE102004008507 | 2004-02-20 |
Publications (2)
| Publication Number | Publication Date |
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| EP1566505A1 EP1566505A1 (en) | 2005-08-24 |
| EP1566505B1 true EP1566505B1 (en) | 2008-07-23 |
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| EP20050001160 Active EP1566505B1 (en) | 2004-02-20 | 2005-01-21 | Security device for a vehicle |
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| DE (2) | DE102004008507B4 (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102005049438A1 (en) * | 2005-10-15 | 2007-04-19 | Bayerische Motoren Werke Ag | Central locking device for a vehicle comprises a control unit for locking and unlocking doors of a vehicle |
| DE102008040038B4 (en) | 2007-12-19 | 2019-10-17 | Volkswagen Ag | Rear impact precrash and crash system |
| DE102012002148A1 (en) | 2012-02-04 | 2013-08-08 | Audi Ag | Motor car, has door control apparatus formed such that door lock is directly locked by signal delivered by door contact sensor and indicating closing operation of door so that locking noise is overlapped by closing noise of door |
| DE102013110559A1 (en) * | 2013-09-24 | 2015-03-26 | Brose Fahrzeugteile Gmbh & Co. Kommanditgesellschaft, Hallstadt | Method for operating a motor vehicle lock arrangement |
| DE102014002999A1 (en) | 2014-02-28 | 2014-08-21 | Daimler Ag | Method for operating vehicle with safety device for automatic locking and unlocking of vehicle doors, involves automatically locking vehicle door while detecting rollover of vehicle, and unlocking vehicle door after specific time |
| WO2017104024A1 (en) * | 2015-12-16 | 2017-06-22 | 三井金属アクト株式会社 | Automobile door lock device |
| DE102019208564B4 (en) * | 2019-06-12 | 2023-08-10 | Volkswagen Aktiengesellschaft | Safety and rescue system for use in a vehicle |
| CN112942989B (en) * | 2021-02-08 | 2022-04-01 | 南京鼎山信息科技有限公司 | Method and system for alarming by using wearable device and intelligent door lock |
| DE102021206913A1 (en) | 2021-07-01 | 2023-01-05 | Volkswagen Aktiengesellschaft | Emergency unlocking system for a vehicle |
| DE102021208068B4 (en) | 2021-07-27 | 2024-04-25 | Volkswagen Aktiengesellschaft | Method for proactively controlling a locking system of a vehicle |
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|---|---|---|---|---|
| DE4322141A1 (en) * | 1993-07-02 | 1995-01-19 | Siemens Ag | Arrangement and method for activating a central locking system in a motor vehicle |
| DE4425307A1 (en) * | 1994-07-18 | 1996-01-25 | Bayerische Motoren Werke Ag | Electrical safety switch for motor vehicle airbag system |
| GB2292126B (en) * | 1994-08-11 | 1997-12-17 | Rover Group | A motor vehicle |
| US5574315A (en) * | 1995-01-17 | 1996-11-12 | Weber; Harold J. | Method and apparatus enabling emergency activated control of electrically operated door lock and window regulator systems in a motor vehicle |
| DE19602990B4 (en) * | 1995-02-04 | 2005-10-06 | Volkswagen Ag | Device for detecting a crash impact of a vehicle |
| DE29505269U1 (en) * | 1995-03-28 | 1995-08-03 | Vinzl Arthur Ing | Delay sensors |
| JP3463423B2 (en) * | 1995-09-26 | 2003-11-05 | 日産自動車株式会社 | Passenger escape support device |
| DE19537619C2 (en) * | 1995-10-09 | 1997-09-18 | Rolf Dipl Ing Schiller | Monitoring device for opening (motor vehicle) doors |
| DE19548562B4 (en) * | 1995-12-23 | 2004-12-16 | Siemens Ag | Device for unlocking the doors of a motor vehicle |
| DE19611578B4 (en) * | 1996-03-23 | 2008-03-06 | Bayerische Motoren Werke Ag | Circuit arrangement for windows of vehicles |
| DE29617425U1 (en) * | 1996-10-08 | 1996-11-28 | Postler Karl Dipl Ing | Installation of an automatic control of electrical locking devices on vehicles to "open" with a given time delay and negative acceleration after an accident |
| DE19725792A1 (en) * | 1997-06-18 | 1998-12-24 | Stefan Kiessling | Unit for door locking at cars with additional child protection for back or rear doors |
| DE19736840B4 (en) * | 1997-08-23 | 2006-01-26 | Volkswagen Ag | Method for situation-dependent triggering of a restraint system and restraint system |
| DE19750979C2 (en) * | 1997-11-18 | 2000-09-14 | Daimler Chrysler Ag | Procedure for accident-related emergency unlocking of a vehicle |
| DE19811865A1 (en) * | 1998-03-18 | 1999-09-23 | Siemens Ag | Motor vehicle occupant protection device operation control method e.g. for airbag |
| DE19822548A1 (en) * | 1998-05-20 | 1999-11-25 | Bluszis Klaus Dieter | Control for safety belts and vehicle doors |
| JP3764101B2 (en) * | 1999-06-25 | 2006-04-05 | 三菱電機株式会社 | Automatic door lock release device |
| DE10039693A1 (en) * | 2000-08-14 | 2002-03-07 | Werner D Bockelmann | Operating accident consequence alleviation device of vehicle with occupant protection arrangement involves operating it when occupant protection arrangement actuated |
| DE10163880A1 (en) * | 2001-12-22 | 2003-07-10 | Volkswagen Ag | Motor vehicle with device for detecting seat occupancy, derives control parameter from operating current drawn by electric motor during seat adjustment |
| DE10208195A1 (en) * | 2002-02-20 | 2003-08-28 | Siemens Ag | Security door lock for a motor vehicle, has emergency self releasing system |
| JP2003269028A (en) * | 2002-03-18 | 2003-09-25 | Aisin Seiki Co Ltd | Door lock releasing device |
| DE10219536A1 (en) * | 2002-05-02 | 2003-11-20 | Opel Adam Ag | Control device for a motor vehicle |
| DE10229033A1 (en) * | 2002-06-28 | 2004-01-22 | Robert Bosch Gmbh | Method and device for recognizing an accident risk |
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- 2004-02-20 DE DE200410008507 patent/DE102004008507B4/en not_active Expired - Fee Related
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- 2005-01-21 EP EP20050001160 patent/EP1566505B1/en active Active
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| Publication number | Publication date |
|---|---|
| DE102004008507A1 (en) | 2005-09-08 |
| EP1566505A1 (en) | 2005-08-24 |
| DE102004008507B4 (en) | 2006-05-18 |
| DE502005004764D1 (en) | 2008-09-04 |
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