EP0711892B1 - Method to synchronise two conversational units on a code signal in a motor vehicle locking apparatus - Google Patents
Method to synchronise two conversational units on a code signal in a motor vehicle locking apparatus Download PDFInfo
- Publication number
- EP0711892B1 EP0711892B1 EP95115487A EP95115487A EP0711892B1 EP 0711892 B1 EP0711892 B1 EP 0711892B1 EP 95115487 A EP95115487 A EP 95115487A EP 95115487 A EP95115487 A EP 95115487A EP 0711892 B1 EP0711892 B1 EP 0711892B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- units
- locking system
- key
- motor vehicle
- code signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C9/00—Individual registration on entry or exit
- G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
- G07C9/00309—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated with bidirectional data transmission between data carrier and locks
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C9/00—Individual registration on entry or exit
- G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
- G07C2009/00753—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated by active electrical keys
- G07C2009/00769—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated by active electrical keys with data transmission performed by wireless means
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C2209/00—Indexing scheme relating to groups G07C9/00 - G07C9/38
- G07C2209/06—Involving synchronization or resynchronization between transmitter and receiver; reordering of codes
Definitions
- the invention relates to a method according to the
- the code signal of the So-called remote-controlled locking system can be radio, infrared or the like are transmitted.
- the problem of synchronizing the two transceiver units arises in the manufacture of the motor vehicle, each time the battery is changed, but also in the event of on-board electrical system malfunctions.
- One unit is arranged in the motor vehicle, while the other is connected to the portable mechanical or electronic key or integrated with it.
- the problem also arises when, as is customary, an alternating code is used, ie a constantly changing code signal.
- an alternating code is used, ie a constantly changing code signal.
- EP-A-0 215 291 describes a method for synchronizing a mobile and a transceiver unit provided in a motor vehicle a remote-controlled motor vehicle locking system known.
- the locking system When the locking system is operated, they exchange a code signal. After identifying the mobile transceiver unit as belonging the two transceiver units become the locking system after Switching on the ignition synchronized.
- the synchronization between the mobile transmitter-receiver unit and the locking system can be in done electromagnetic by radio or sound.
- the invention has for its object a method of the beginning to create a higher level of security against manipulation enabled during synchronization.
- This vote should be possible already during the manufacture of the motor vehicle or the initial installation of the Locking system, but also at any time in the event of an interruption of the Electrical system, in the event of a malfunction and the like. It should be possible if there is any asynchronicity, the two units in again Bring agreement. It should also be possible to have several transportable units and a fixed unit together synchronize.
- the method known in this context, the to synchronize the two transportable units with one another (DE 32 37 622 A1) mostly fails because the two units are separated are kept from each other or their users are different Times use the locking system.
- the invention is in a possibly nonexistent Synchronization of the two units a synchronization carried out when the locking system identified an associated key. With a mechanical Key this can be the case if the plant is properly unlocked. At a Electronic key can do this with the help of the preparatory Signal dialogs take place, as for example in the unpublished German patent application P 44 11 435.4 is described. Because of the nonexistent It is not possible to be synchronous Locking system using the code signal, i.e. by means of Remote control. The system can, however a mechanical key can be opened. The Loss of ease of use is offset by the security resulting from the synchronicity then made to any, not necessarily a relevant code signal following an education law results. This code signal cannot be transmitted through the Unauthorized be predetermined.
- the synchronization can be two-stage be made. For example, when pressed the locking system with a mechanical key a synchronization standby signal are generated, which at Actuation of the ignition lock again with the same mechanical Key connects the actual synchronization. It is also possible, preferably using a synchronization electronic key in one step. It can with the Actuation of the locking system or only when the ignition lock is actuated synchronization with the key. The latter offers the Possibility of anew each time the motor vehicle is operated Perform synchronization regardless of whether the two units are already synchronized with each other. In this case it is relevant code signal after each synchronization compared to the previous one relevant code signal changed.
- the motor vehicle Immobilizer with inductive coupling to the vehicle key ignition switched on.
- This inductive connection Transfer coding data for remote control.
- the prerequisite for this is the Identification of the key as belonging.
- the identification takes place with the help a dialogue between the locking system and the key.
- the dialogue takes place wirelessly, for example with the help of an inductive coupling is effective when the key is inserted in the ignition lock
- the key has a memory and a send and Receiving device with a corresponding device of Locking system communicates.
- It can also be a multi-level dialogue take place, i.e. to a first question of the locking system on the key If the key is answered correctly, a second question follows Lock system after a second answer. Only when both answers the locking system is unlocked.
- connection of a mechanical with an electronic key offers additional theft protection. Is it an unauthorized one User managed to copy the mechanical key, it is through the (correct) answers of the electronic that are then not available Key prevented from starting the motor vehicle.
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Lock And Its Accessories (AREA)
Description
Die Erfindung bezieht sich auf ein Verfahren nach dem Oberbegriff des Patentanspruchs 1. Das Codesignal der sog. fernbedienbaren Schließanlage kann per Funk, per Infrarot oder dgl. übertragen werden.The invention relates to a method according to the The code signal of the So-called remote-controlled locking system can be radio, infrared or the like are transmitted.
Bei der Fertigung des Kraftfahrzeugs, bei jedem Batteriewechsel, aber auch bei Bordnetzstörungen stellt sich das Problem der Synchronisierung der beiden Sender-Empfängereinheiten. Dabei ist eine Einheit im Kraftfahrzeug angeordnet, während die andere mit dem tragbaren mechanischen oder elektronischen Schlüssel verbunden bzw. mit diesem integriert ist. Das Problem stellt sich auch dann, wenn wie allgemein üblich mit einem Wechselcode gearbeitet wird, d.h. mit einem sich ständig ändernden Codesignal. Die Änderungen erfolgen zwar nach einem definierten Bildungsgesetz, doch liegt häufig der Fall vor, bei dem die Änderung nur für das von der tragbaren Einheit ausgesandte Codesignal aufgrund einer spielerischen Betätigung erfolgt. In diesem Fall wird zwar mit einem oder mehreren Fangbereichen gearbeitet, d.h. einer Anzahl von Codesignalen, die sich an das zuletzt empfangene aufgrund des Bildungsgesetzes anschließen, doch kann der gültige Fangbereich überschritten werden. Auch das Nachschieben eines zweiten, kleineren Fangbereichs führt nicht in jedem Fall zum gewünschten Erfolg (vgl. DE 35 36 378 A1). The problem of synchronizing the two transceiver units arises in the manufacture of the motor vehicle, each time the battery is changed, but also in the event of on-board electrical system malfunctions. One unit is arranged in the motor vehicle, while the other is connected to the portable mechanical or electronic key or integrated with it. The problem also arises when, as is customary, an alternating code is used, ie a constantly changing code signal. Although the changes are made in accordance with a defined education law, there is often the case in which the change only takes place for the code signal transmitted by the portable unit due to playful operation. In this case, although worked with one or more capture ranges, ie a number of C odesignalen, which connect to the last received due to the formation of the law, but the valid capture range can be exceeded. Even pushing a second, smaller catch area does not always lead to the desired success (cf. DE 35 36 378 A1).
Um diesen Problemen Rechnung zu tragen, ist es bekannt, die Synchronisation von einem vorbereitenden Auslösesignal abhängig zu machen, das aus einem ursprünglich gültigen Urcode abgeleitet ist. Dieses Verfahren ist nur in Werkstätten anwendbar. In den eingangs genannten Fällen, bei denen beispielsweise eine Unterbrechung des Bordnetzes vorliegt, besteht die Gefahr, dass es dem Fahrzeugbenutzer nicht oder nicht ohne weiteres möglich ist, sein Fahrzeug zu benutzen (vgl. DE 43 02 550 A1). Auch der aus der WO-A-92/15761 bekannte Weg, wonach die Synchronisierbereitschaft über ein Signal hergestellt wird, das über die Diagnoseschnittstelle eingegeben wird, ändert an dieser Situation nichts. Auch dieses Verfahren eignet sich lediglich für den Einsatz in Werkstätten und dgl..To address these issues, it is known that Synchronization dependent on a preparatory trigger signal make, which is derived from an originally valid original code. This The method can only be used in workshops. In the above Cases where, for example, an interruption in the vehicle electrical system there is a risk that the vehicle user may not or not it is easily possible to use his vehicle (cf. DE 43 02 550 A1). Also the way known from WO-A-92/15761, according to which the Readiness for synchronization is established via a signal which is transmitted via the Entered diagnostic interface does not change this situation. This method is also only suitable for use in workshops and the like ..
Aus der EP-A-0 215 291 ist ein Verfahren zum Synchronisieren einer mobilen und einer in einem Kraftfahrzeug vorgesehenen Sender-Empfängereinheit einer fembedienbaren Kraftfahrzeug-Schließanlage bekannt. Beim Betätigen der Schließanlage tauschen sie ein Codesignal aus. Nach dem Identifizieren der mobilen Sender-Empfängereinheit als zugehörig zur Schließanlage werden die beiden Sender-Empfängereinheiten nach dem Einschalten der Zündung synchronisiert. Die Synchronisierung zwischen der mobilen Sender-Empfängereinheit und der Schließanlage kann in elektromagnetischer Weise durch Funk oder Schall erfolgen.EP-A-0 215 291 describes a method for synchronizing a mobile and a transceiver unit provided in a motor vehicle a remote-controlled motor vehicle locking system known. When the locking system is operated, they exchange a code signal. After identifying the mobile transceiver unit as belonging the two transceiver units become the locking system after Switching on the ignition synchronized. The synchronization between the mobile transmitter-receiver unit and the locking system can be in done electromagnetic by radio or sound.
Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren der eingangs genannten Art zu schaffen, das eine höhere Sicherheit gegen Manipulation bei der Synchronisierung ermöglicht. Diese Abstimmung soll möglich sein bereits während der Fertigung des Kraftfahrzeugs bzw. dem Ersteinbau der Schliessanlage, aber auch jederzeit im Falle einer Unterbrechung des Bordnetzes, bei einer Betriebsstörung und dgl.. Es soll damit möglich sein, bei einer ggf. vorliegenden Asynchronizität die beiden Einheiten wieder in Übereinstimmung zu bringen. Auch soll es möglich sein, mehrere transportable Einheiten und eine feste Einheit miteinander zu synchronisieren. Das in diesem Zusammenhang bekannte Verfahren, die beiden transportablen Einheiten miteinander zu synchronisieren (DE 32 37 622 A1) scheitert zumeist daran, dass die beiden Einheiten getrennt voneinander aufbewahrt werden bzw. ihre Benutzer zu unterschiedlichen Zeiten die Schliessanlage benutzen. The invention has for its object a method of the beginning to create a higher level of security against manipulation enabled during synchronization. This vote should be possible already during the manufacture of the motor vehicle or the initial installation of the Locking system, but also at any time in the event of an interruption of the Electrical system, in the event of a malfunction and the like. It should be possible if there is any asynchronicity, the two units in again Bring agreement. It should also be possible to have several transportable units and a fixed unit together synchronize. The method known in this context, the to synchronize the two transportable units with one another (DE 32 37 622 A1) mostly fails because the two units are separated are kept from each other or their users are different Times use the locking system.
Die Erfindung löst diese Aufgabe durch die kennzeichnenden Merkmale des Patentanspruchs 1.The invention solves this problem by the characterizing Features of claim 1.
Durch die Erfindung wird bei einer ggf. nicht bestehenden Synchronisierung der beiden Einheiten eine Synchronisierung dann vorgenommen, wenn die Schließanlage den bzw. einen zugehörigen Schlüssel identifiziert. Bei einem mechanischen Schlüssel kann dies dann der Fall sein, wenn die Anlage ordnungsgemäß aufgeschlossen wird. Bei einem elektronischen Schlüssel kann dies mit Hilfe des vorbereitenden Signaldialogs erfolgen, wie er beispielsweise in der nicht vorveröffentlichten deutschen Patentanmeldung P 44 11 435.4 beschrieben ist. Aufgrund der nichtbestehenden Synchronizität ist es dabei nicht möglich, die Schließanlage mit Hilfe des Codesignals, d.h. mittels Fernbedienung zu betätigen. Die Anlage kann aber durch einen/den mechanischen Schlüssel geöffnet werden. Die Einbuße an Bedienungskomfort aber wird aufgehoben durch die Sicherheit, die sich aus der dann vorgenommenen Synchronizität auf ein beliebiges, nicht notwendigerweise einem Bildungsgesetz folgenden maßgeblichen Codesignal ergibt. Dieses Codesignal kann nicht durch den Unberechtigten vorherbestimmt werden. Sofern sich die bei jeder Synchronisation eingestellten Codesignale deutlich und nicht reproduzierbar voneinander unterscheiden, ist damit ein Höchstmaß an Abhörsicherheit erreicht. Gegenüber den bekannten Synchronisierverfahren, die einen Werkstattaufenthalt erforderlich machen, ergibt sich ein erheblicher Komfortgewinn, da die Synchronisierung ohne Zutun des Benutzers erfolgt.The invention is in a possibly nonexistent Synchronization of the two units a synchronization carried out when the locking system identified an associated key. With a mechanical Key this can be the case if the plant is properly unlocked. At a Electronic key can do this with the help of the preparatory Signal dialogs take place, as for example in the unpublished German patent application P 44 11 435.4 is described. Because of the nonexistent It is not possible to be synchronous Locking system using the code signal, i.e. by means of Remote control. The system can, however a mechanical key can be opened. The Loss of ease of use is offset by the security resulting from the synchronicity then made to any, not necessarily a relevant code signal following an education law results. This code signal cannot be transmitted through the Unauthorized be predetermined. If the at every synchronization set code signals clearly and not reproducibly different from each other thus achieving maximum security against eavesdropping. Across from the well-known synchronization method, the one Require a visit to the workshop Significant increase in comfort, since the synchronization without User action is taken.
Wesentlich für die Erfindung ist, daß bei jeder ordnungsgemäßen Benutzung des Kraftfahrzeugs diese Synchronisation vorgenommen wird. Die Synchronisation kann zweistufig vorgenommen werden. So kann beispielsweise bei Betätigen der Schließanlage mit einem mechanischen Schlüssel ein Synchronisation-Bereitschaftssignal erzeugt werden, dem sich beim Betätigen des Zündschlosses wiederum mit demselben mechanischen Schlüssel die eigentliche Synchronisation anschliesst. Es ist aber auch möglich, die Synchronisation vorzugsweise bei Verwendung eines elektronischen Schlüssels einstufig vorzunehmen. Dabei kann bei dem Betätigen der Schliessanlage bzw. allein beim Betätigen des Zündschlosses mit dem Schlüssel die Synchronisation erfolgen. Letzteres bietet die Möglichkeit, bei jedem Betrieb des Kraftfahrzeugs von neuem eine Synchronisation durchzuführen unabhängig davon, ob die beiden Einheiten bereits miteinander synchronisiert sind. In diesem Fall ist dann das massgebliche Codesignal nach jeder Synchronisation gegenüber dem vorher massgeblichen Codesignal verändert.It is essential for the invention that with any proper Use of the motor vehicle this synchronization is made. The synchronization can be two-stage be made. For example, when pressed the locking system with a mechanical key a synchronization standby signal are generated, which at Actuation of the ignition lock again with the same mechanical Key connects the actual synchronization. It is also possible, preferably using a synchronization electronic key in one step. It can with the Actuation of the locking system or only when the ignition lock is actuated synchronization with the key. The latter offers the Possibility of anew each time the motor vehicle is operated Perform synchronization regardless of whether the two units are already synchronized with each other. In this case it is relevant code signal after each synchronization compared to the previous one relevant code signal changed.
Durch die Synchronisation auf unterschiedliche Codesignale für Öffnen und Schliessen der Schliessanlage wird der Manipulationsschutz erhöht. Demselben Ziel dient auch die Synchronisation auf einen zufälligen Zahlenwert für das bzw. die massgeblichen Codesignale. In letzterem Fall unterscheiden sich die beiden Zahlenwerte voneinander. Sie können beispielsweise mit Hilfe eines Zufallsgenerators oder aber auch aus Kraftfahrzeugdaten gewonnen werden, die zu einem definierten Zeitpunkt, beispielsweise bei Abschalten des Antriebsaggregats vorliegen.By synchronization to different code signals for opening and Tamper protection is increased when the locking system is closed. The synchronization to a random serves the same goal Numerical value for the relevant code signal (s). In the latter case the two numerical values differ from each other. You can for example with the help of a random generator or also from Motor vehicle data are obtained that at a defined point in time, for example when the drive unit is switched off.
Auch hier ist es möglich, den massgeblichen Zahlenwert gemäss einem vorgegebenen Bildungsgesetz zu verändern. Gegenüber den bekannten Verfahren, bei denen ebenfalls mit einem Bildungsgesetz gearbeitet wird, unterscheidet sich die Erfindung dann in dem Ausgangswert, der nicht nach dem Bildungsgesetz, sondern zufällig bestimmt ist. Damit ist auch hier der Manipulationsschutz weiter verbessert. Here too it is possible to determine the relevant numerical value according to a to change the given education law. Compared to the known Procedures that also work with an education law The invention then differs in the initial value, which does not differ the Education Act, but is determined at random. So here is the Tamper protection further improved.
Bei der Erfindung befindet sich im Kraftfahrzeug eine elektronische Wegfahrsperre mit induktiver Kopplung zum Fahrzeugschlüssel bei eingeschalteter Zündung. Über diese induktive Verbindung werden Codierdaten für die Fembedienung übertragen. Voraussetzung hierfür ist die Identifizierung des Schlüssels als zugehörig. Bei einem mechanischen Schlüssel kann dies durch das ordnungsgemässe öffnen einer Fahrzeugtür und/oder Schliessen des Zündstromkreises erfolgen. Bei einem elektronischen Schlüssel, der alternativ oder ergänzend zu einem mechanischen Schlüssel vorgesehen ist, erfolgt die Identifizierung mit Hilfe eines Dialogs zwischen der Schliessanlage und dem Schlüssel. Der Dialog findet drahtlos, beispielsweise mit Hilfe einer induktiven Kopplung statt, die dann wirksam ist, wenn der Schlüssel in das Zündschloss eingesteckt ist.Der Schlüssel besitzt hierzu einen Speicher sowie eine Sende- und Empfangseinrichtung, die mit einer entsprechenden Einrichtung der Schliessanlage kommuniziert. Es kann dabei auch ein mehrstufiger Dialog stattfinden, d.h. auf eine erste Frage der Schliessanlage an den Schlüssel folgt bei "richtiger" Antwort des Schlüssels eine zweite Frage der Schliessanlage nach einer zweiten Antwort. Erst wenn beide Antworten richtig sind, wird die Schliessanlage entriegelt.In the invention there is an electronic in the motor vehicle Immobilizer with inductive coupling to the vehicle key ignition switched on. About this inductive connection Transfer coding data for remote control. The prerequisite for this is the Identification of the key as belonging. With a mechanical This can be key by properly opening a vehicle door and / or closing of the ignition circuit. At a electronic key that alternatively or in addition to a mechanical key is provided, the identification takes place with the help a dialogue between the locking system and the key. The dialogue takes place wirelessly, for example with the help of an inductive coupling is effective when the key is inserted in the ignition lock For this purpose, the key has a memory and a send and Receiving device with a corresponding device of Locking system communicates. It can also be a multi-level dialogue take place, i.e. to a first question of the locking system on the key If the key is answered correctly, a second question follows Lock system after a second answer. Only when both answers the locking system is unlocked.
Die Verbindung eines mechanischen mit einem elektronischen Schlüssels bietet einen zusätzlichen Diebstahlschutz. Ist es einem unberechtigten Benutzer gelungen, den mechanischen Schlüssel zu kopieren, wird er durch die dann nicht vorliegenden (richtigen) Antworten des elektronischen Schlüssels daran gehindert, das Kraftfahrzeug in Betrieb zu nehmen. The connection of a mechanical with an electronic key offers additional theft protection. Is it an unauthorized one User managed to copy the mechanical key, it is through the (correct) answers of the electronic that are then not available Key prevented from starting the motor vehicle.
Beim Einschalten der Zündung werden dann neue Daten an den Schlüssel übertragen, und zwar in Datenwort "A" zum Erzeugen des nächsten Codesignals für "Schließen" und ein Datenwort "B" zum Erzeugen des nächsten Codesignals "öffnen", die Datenworte "A und B" können von einem Zufallszahlengenerator erzeugt sein und werden in einer Steuereinheit sowohl innerhalb einer fahrzeugfesten Sender-Empfängereinheit als auch in einer beweglichen derartigen Einheit gespeichert. Beim nächsten Öffnen oder Schließen des Kraftfahrzeugs über Fernbedienung müssen oder werden diese Daten "A" bzw. "B" per Funk oder optisch übertragen. Als Verfeinerung dieses Verfahrens ist es auch möglich, diese Wert als Startwerte für ein Wechselcode zu benutzen. Damit wird es möglich, den Dialog zwischen den beiden Einheiten abhörsicher zu gestalten und auch dann, wenn keine Synchronisation vorliegt, diese nach dem Öffnen des Kraftfahrzeugs bzw. der Inbetriebnahme des Antriebsaggregats mit Hilfe des Schlüssels herzustellen.When the ignition is switched on, new data is then displayed transmit the key, namely in data word "A" to Generate the next code signal for "close" and on Data word "B" for generating the next code signal "Open", the data words "A and B" can be generated by a random number generator be generated and will be in one Control unit both within a vehicle-mounted transmitter-receiver unit as well as in a movable such Unit saved. The next time you open or Must close the motor vehicle via remote control or will this data be "A" or "B" by radio or optically transfer. As a refinement of this process, it is also possible to use this value as start values for an alternating code to use. This will make the dialogue possible tap-proof between the two units and even if there is no synchronization, this after opening the motor vehicle or starting up the drive unit using the key.
Claims (2)
- , Method for synchronising a mobile transceiver unit of a remotely controllable motor vehicle locking system and a transceiver unit provided in a motor vehicle, which transceiver units exchange a code signal on actuation of the locking system, and once the mobile transceiver unit has been identified as being associated with the locking system, the two transceiver units are synchronised after the ignition has been switched on, the synchronisation between the mobile transceiver unit and the locking system takes place by means of an inductive coupling provided by an electronic immobiliser, the coupling is then effective when the lgnition key is inserted in the ignition lock, characterised in that the two units are synchronised to different code signals for locking and opening the locking system.
- Method according to claim 1, characterised in that the mobile transceiver unit is provided with a mechanical key, the mechanical key is inserted in a mechanical ignition lock and the two units are only synchronlsed via the inductive coupling when the key and ignition lock fit together mechanically.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4440349A DE4440349A1 (en) | 1994-11-11 | 1994-11-11 | Method for synchronizing two dialog-capable transceiver units for a code signal in a motor vehicle locking system |
| DE4440349 | 1994-11-11 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0711892A1 EP0711892A1 (en) | 1996-05-15 |
| EP0711892B1 true EP0711892B1 (en) | 2004-11-24 |
Family
ID=6533087
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP95115487A Expired - Lifetime EP0711892B1 (en) | 1994-11-11 | 1995-09-29 | Method to synchronise two conversational units on a code signal in a motor vehicle locking apparatus |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0711892B1 (en) |
| DE (2) | DE4440349A1 (en) |
| ES (1) | ES2227534T3 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2774121B1 (en) * | 1998-01-29 | 2000-04-07 | Siemens Automotive Sa | LOCKING SYSTEM FOR MOTOR VEHICLE WITH SCALABLE CODE AND IDENTIFICATION |
| FR2774120B1 (en) * | 1998-01-29 | 2000-04-07 | Siemens Automotive Sa | LOCKING SYSTEM FOR MOTOR VEHICLE WITH SCALABLE CODE AND IDENTIFICATION |
| ES2183738B1 (en) * | 2001-08-03 | 2004-01-01 | Talleres Escoriaza Sa | ASynchronous COMMUNICATIONS PROTOCOL FOR ELECTRONIC KEYS OF LOCKS AND SECURITY SYSTEMS. |
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|---|---|---|---|---|
| DE3234539A1 (en) * | 1982-09-17 | 1984-03-22 | Siemens AG, 1000 Berlin und 8000 München | METHOD FOR SECURING THE CODE OF AN ELECTRONIC KEY |
| DE3237622A1 (en) | 1982-10-11 | 1984-04-12 | Bayerische Motoren Werke AG, 8000 München | SECURITY DEVICE |
| DE3313098C1 (en) * | 1983-04-12 | 1984-10-11 | Daimler-Benz Ag, 7000 Stuttgart | Electronic lock system |
| DE3529882A1 (en) * | 1985-08-21 | 1987-02-26 | Vdo Schindling | SYSTEM FOR LOCKING AND / OR UNLOCKING A SECURITY DEVICE |
| DE3677676D1 (en) * | 1985-09-10 | 1991-04-04 | Huelsbeck & Fuerst | ELECTRONIC LOCKING DEVICE FOR MOTOR VEHICLES. |
| DE3536378A1 (en) * | 1985-10-11 | 1987-04-16 | Bayerische Motoren Werke Ag | SAFETY DEVICE FOR A MOTOR VEHICLE |
| DE3636822C2 (en) * | 1986-10-29 | 1993-12-23 | Ruf Kg Wilhelm | Electronic remote control device, in particular for central locking systems of motor vehicles |
| GB2198779B (en) * | 1986-12-06 | 1990-07-04 | Kokusan Kinzoku Kogyo Kk | Vehicle anti-theft arrangement |
| JP2546842B2 (en) * | 1987-06-16 | 1996-10-23 | 日産自動車株式会社 | Vehicle locking / unlocking control device |
| DE3905651A1 (en) * | 1989-02-24 | 1990-08-30 | Daimler Benz Ag | METHOD FOR SECURING CODE WORDS OF A REMOTE CONTROL SYSTEM AND REMOTE CONTROL SYSTEM WITH CODE TRANSFERABLE BY CODE WORDS |
| DE4025229A1 (en) * | 1990-08-09 | 1992-02-20 | Uwe Heyer | Universally applicable coding system - accepts bar code or laser reader for automatic contactless code read=out |
| WO1992015761A1 (en) * | 1991-03-07 | 1992-09-17 | Siemens Aktiengesellschaft | System with optical or radio remote control for closing motor vehicles |
| DE4236863A1 (en) * | 1992-01-22 | 1994-05-05 | Vdo Schindling | Vehicle active-key programming for central door-locking system - involves encoding key with unique fixed and variable component data-set for subsequent transfer to, and matching of, lock control unit. |
| DE4236862A1 (en) * | 1992-01-22 | 1994-05-05 | Vdo Schindling | Individualising and synchronising vehicle central door-locking unit - involves battery powered active key transmitting fixed and variable components of recognition code data-set for lock control unit programming. |
| GB2265412A (en) * | 1992-03-27 | 1993-09-29 | Ian Francis Deviny | Electronic key and lock |
| DE4242231C3 (en) * | 1992-12-15 | 1997-01-16 | Diehl Gmbh & Co | Remote control device |
| DE4302550C2 (en) * | 1993-01-29 | 1997-02-20 | Siemens Ag | Vehicle locking system |
| DE4308899C1 (en) * | 1993-03-19 | 1994-02-03 | Siemens Ag | Remote-controlled vehicle locking using dialogue method - transmitting successive signals having respective codes between key transmitter and lock, each code being verified |
| DE4317117C1 (en) * | 1993-05-21 | 1994-07-21 | Audi Ag | Remote-controlled central locking system for automobile |
-
1994
- 1994-11-11 DE DE4440349A patent/DE4440349A1/en not_active Ceased
-
1995
- 1995-09-29 EP EP95115487A patent/EP0711892B1/en not_active Expired - Lifetime
- 1995-09-29 DE DE59510972T patent/DE59510972D1/en not_active Expired - Lifetime
- 1995-09-29 ES ES95115487T patent/ES2227534T3/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| DE4440349A1 (en) | 1996-05-15 |
| EP0711892A1 (en) | 1996-05-15 |
| DE59510972D1 (en) | 2004-12-30 |
| ES2227534T3 (en) | 2005-04-01 |
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