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DE4020445A1 - SAFETY DEVICE FOR MOTOR VEHICLES - Google Patents

SAFETY DEVICE FOR MOTOR VEHICLES

Info

Publication number
DE4020445A1
DE4020445A1 DE4020445A DE4020445A DE4020445A1 DE 4020445 A1 DE4020445 A1 DE 4020445A1 DE 4020445 A DE4020445 A DE 4020445A DE 4020445 A DE4020445 A DE 4020445A DE 4020445 A1 DE4020445 A1 DE 4020445A1
Authority
DE
Germany
Prior art keywords
code signal
transponder
time window
safety device
stationary
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.)
Granted
Application number
DE4020445A
Other languages
German (de)
Other versions
DE4020445C2 (en
Inventor
Walter Weishaupt
Mario Neudold
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bayerische Motoren Werke AG
Original Assignee
Bayerische Motoren Werke AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6399407&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=DE4020445(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority to DE4003280A priority Critical patent/DE4003280C5/en
Application filed by Bayerische Motoren Werke AG filed Critical Bayerische Motoren Werke AG
Priority to DE4020445A priority patent/DE4020445C2/en
Publication of DE4020445A1 publication Critical patent/DE4020445A1/en
Application granted granted Critical
Publication of DE4020445C2 publication Critical patent/DE4020445C2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • G07C9/00182—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated with unidirectional data transmission between data carrier and locks
    • 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
    • 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
    • G07C9/00182—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated with unidirectional data transmission between data carrier and locks
    • G07C2009/00198—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated with unidirectional data transmission between data carrier and locks the keyless data carrier having more than one limited data transmission ranges
    • 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
    • G07C2009/00555—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 comprising means to detect or avoid relay attacks
    • 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
    • G07C2009/00793—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 by Hertzian waves
    • 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
    • G07C9/00896—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys specially adapted for particular uses
    • G07C2009/00928—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys specially adapted for particular uses for garage doors
    • 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
    • G07C2209/60—Indexing scheme relating to groups G07C9/00174 - G07C9/00944
    • G07C2209/63—Comprising locating means for detecting the position of the data carrier, i.e. within the vehicle or within a certain distance from the vehicle

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Lock And Its Accessories (AREA)
  • Selective Calling Equipment (AREA)

Abstract

The automobile anti-theft device uses a stationary transponder housed within the vehicle and a portable transponder carried by the vehicle owner, receiving an interrogation code, signal from the stationary trnasponder, to allow a response code signal to be transmitted, for comparison with an expected code signal. After the transmission of the interrogation code signal by the stationary transponder a specific time slot is provided for reception of the response code signal, any signal received outside this time slot being ignored. The time slot is pref. defined by the propogation time for the interrogation and response code signals when the portable transponder is immediately adjacent the vehicle. ADVANTAGE - Prevents insertion of intermediate transponders.

Description

Die Erfindung bezieht sich auf eine Sicherheitsein­ richtung nach dem Oberbegriff des Patentanspruchs 1. Gegenstand des Hauptpatents ist eine Sicherheits­ einrichtung, bei der im oder am Kraftfahrzeug ein stationärer Transponder installiert ist, mit dem ein Fragecodesignal erzeugt wird. Dieser Transponder korrespondiert mit einem tragbaren Transponder, der das Fragecodesignal empfängt und ein Anwortcodesi­ gnal aussendet, das in einem Codesignalvergleicher mit einem erwarteten Codesignal verglichen wird. Bei Übereinstimmung der beiden Codesignale wird ein Entsicherungssignal an eine Entsicherungseinrichtung erzeugt. Wesentlich beim Hauptpatent ist dabei, daß nur einer der Sender der beiden Transponder sein Codesignal über eine kurze Reichweite und der andere Sender sein entsprechendes Codesignal über eine relativ große Reichweite aussendet. Damit wird ein hohes Maß an Abhörsicherheit erzielt.The invention relates to security Direction according to the preamble of claim 1. The main patent deals with a security device in the in or on the motor vehicle stationary transponder is installed with the one Question code signal is generated. This transponder corresponds to a portable transponder that receives the question code signal and an answer code i gnal sends out that in a code signal comparator is compared with an expected code signal. At The two code signals match Unlocking signal to an unlocking device generated. It is essential with the main patent that only be one of the transmitters of the two transponders Short-range code signal and the other Sender sends its corresponding code signal via a sends out a relatively large range. So that becomes a achieved a high level of security against eavesdropping.

Aufgabe der vorliegenden Erfindung ist es, die Abhörsicherheit weiter zu steigern.The object of the present invention is that To further increase eavesdropping security.

Dies wird erreicht, mit den kennzeichnenden Merk­ malen des Patentanspruchs 1.This is achieved with the distinctive mark paint the patent claim 1.

Durch die Erfindung wird erreicht, daß auch unter besonderen Bedingungen die Abhörsicherheit gewährleistet ist. Dabei ist der Fall angenommen, bei dem das Codesignal geringer Reichweite auf einen Hilfsträger mit großer Reichweite umgesetzt wird. Dies kann beispielsweise mit Hilfe zweier zusätz­ licher tragbarer Transponder erfolgen. Befindet sich einer in der Nähe des Kraftfahrzeugs und der andere in der Nähe des berechtigten Benutzers des Kraft­ fahrzeugs, so kann die Reichweite des Codesignals mit eigentlich geringer Reichweite auf diese Weise beliebig vergrößert werden und der Reichweite des Codesignals mit großer Reichweite angepaßt werden. Auf diese Weise wäre es möglich, unbemerkt für den berechtigten Benutzer das Kraftfahrzeug zu öffnen.The invention ensures that also under Interception security under special conditions  is guaranteed. The case is assumed where the code signal has a short range to one Auxiliary carrier with a large range is implemented. This can be done, for example, with the help of two additional Licher portable transponder. Is located one near the motor vehicle and the other near the authorized user of the force vehicle, so the range of the code signal with actually short range in this way can be enlarged arbitrarily and the range of the Code signal can be adapted with a long range. This way it would be possible to go unnoticed for the authorized users to open the motor vehicle.

Die Erfindung macht sich nun die durch die Verlän­ gerung der Reichweite bedingte Verlängerung der Antwortzeit, d. h. der Zeit bis zum Eingang des Antwortcodesignal, zunutze. Es wird für den Eingang des Antwortcodesignals ein Zeitfenster bereitge­ stellt, das nur Antwortcodesignale berücksichtigt, die innerhalb der vorgegebenen Laufzeit am Kraft­ fahrzeug eintreffen. Diese Laufzeit ist ausgerichtet an der Zeit, die zwischen dem Aussenden des Frage- und dem Eingang des Antwortcodesignals vergeht, wenn sich der berechtigte Benutzer mit dem mobilen Transponder in der Nähe des Kraftfahrzeugs befindet. Anwortcodesignale, die nach Ablauf des Zeitfensters am Kraftfahrzeug ankommen, werden dann nicht mehr berücksichtigt. Auf diese Weise ist die mögliche Verlängerung der Reichweite des Codesignals mit geringer Reichweite unkritisch. The invention now makes itself through the extension extension of the range Response time, d. H. the time until the receipt of the Answer code signal, take advantage. It will be for the entrance a time window of the response code signal that only takes answer code signals into account, the within the given term at the force vehicle arrive. This term is aligned the time between sending out the question- and the input of the response code signal passes if the authorized user with the mobile Transponder is located near the motor vehicle. Response code signals after the time window then arrive at the motor vehicle will no longer be considered. In this way, the possible Extension of the range of the code signal with short range not critical.  

In den Patentansprüchen 2 bis 6 sind Möglichkeiten aufgezeigt, das Zeitfenster zu gestalten. So be­ inhalten die Merkmale des Patentanspruchs
2 die Möglichkeit, das Zeitfenster entsprechend den individuellen, bauteilabhängigen Bedin­ gungen zu justieren
3 die Einstellung eines zeitlich dann oder von vornherein unveränderlichen Zeitfensters
4 die Einstellung des minimalen Zeitfensters hierzu,
5 die hierzu alternative Form einer Variation der zeitlichen Länge des Zeitfensters und
6 die durch den stationären Transponder gesteu­ erte Variation des Zeitfensters im Gegensatz zu einer in definierter, beispielsweise starrer Weise veränderlichen Lage des Zeitfensters.In the claims 2 to 6 possibilities are shown to design the time window. So contain the features of the claim
2 the possibility to adjust the time window according to the individual, component-dependent conditions
3 the setting of a time window that cannot be changed from the start or from the start
4 the setting of the minimum time window for this,
5 the alternative form of variation of the temporal length of the time window and
6 the variation of the time window controlled by the stationary transponder, in contrast to a change in the position of the time window in a defined, for example rigid manner.

Letzteres kann beispielsweise durch eine Variation des Zeitfensters in definiertem Rhythmus bzw. abhängig von der Anzahl der Frage-/Antwort-Dialoge erfolgen.The latter can, for example, by a Variation of the time window in a defined Rhythm or depending on the number of Question / answer dialogues take place.

In jedem Fall wird durch die Erfindung verhindert, daß die Reichweite der Sicherheitseinrichtung durch die Verwendung spezieller zusätzlicher Transponder, die als tragbare Relaisstationen dienen, derart vergrößert wird, daß eine wirksame Kommunikation zwischen dem Kraftfahrzeug und dem mobilen Transponder abläuft.In any case, the invention prevents that the range of the safety device through the use of special additional transponders, which serve as portable relay stations, such that increases effective communication  between the motor vehicle and the mobile Transponder expires.

In der beigefügten Systemübersicht ist ein Ausfüh­ rungsbeispiel der Erfindung erläutert. Dabei ist im oberen Teil schematisch die Situation für eine zulässige Kommunikation zwischen dem Fahrzeug und dem Fahrzeugbenutzer dargestellt. Im mittleren Teil ist der Fall dargestellt, bei dem ein Unberechtigter versucht, das Fahrzeug zu benutzen. Schließlich ist im unteren Teil das Zeitdiagramm für die beiden betrachteten Benutzungsarten dargestellt.There is a version in the attached system overview Example of the invention explained. It is in upper part schematically the situation for a permissible communication between the vehicle and presented to the vehicle user. In the middle part the case is shown in which an unauthorized person tries to use the vehicle. Finally is in the lower part the time diagram for the two considered types of use.

Die "zulässige Kommunikation" wird zwischen dem als Funkschlüssel bezeichneten tragbaren Transponder und dem im Kraftfahrzeug vorhandenen, nicht darge­ stellten, stationären Transponder durchgeführt. Hierzu sendet der stationäre Transponder ein Frage­ codesignal aus, das im Funkschlüssel empfangen wird und selbsttätig mit einem Antwortcodesignal beant­ wortet wird. Der zeitliche Ablauf ist im Zeitdia­ gramm der Systemübersicht dargestellt und im we­ sentlichen durch die Zeiten t1 und t2 bestimmt. Der geringe zeitliche Abstand zwischen den beiden Zeiten t1 und t2 ist durch die Zeit bestimmt, die zum Umsetzen des Antwortcodesignals und Generieren des Fragecodesignals im Funkschlüssel erforderlich ist. Dabei ist für einen weitgehenden Schutz vor einer unberechtigten Benutzung eines der beiden Codesi­ gnale mit kurzer, das andere mit großer Reichweite versehen, wie es auch Gegenstand des Hauptpatents ist. The "permissible communication" is carried out between the portable transponder referred to as a radio key and the stationary transponder present in the motor vehicle, not shown. For this purpose, the stationary transponder sends out a question code signal, which is received in the radio key and is automatically answered with an answer code signal. The time sequence is shown in the time diagram of the system overview and is essentially determined by the times t 1 and t 2 . The short time interval between the two times t 1 and t 2 is determined by the time required to convert the answer code signal and generate the question code signal in the radio key. For extensive protection against unauthorized use, one of the two codes is provided with a short range, the other with a long range, as is also the subject of the main patent.

In einem Extremfall könnte dennoch eine Manipulation erfolgen. Diese ist in der Systemübersicht darge­ stellt. Wesentlich sind dabei zwei Transponder, die als "Funkbrücke" zwischen dem Kraftfahrzeug und dem Funkschlüssel dienen. Mit Hilfe dieser beiden Transponder wird das Fragecodesignal (t1) und/oder das Antwortcodesignal (t2) in seiner Reichweite verlängert. Das Fragecodesignal wird dabei mit Hilfe des ersten Transponders auf ein Codesignal umgesetzt, das auf einem Hilfsträger sitzt. Dieses Codesignal benötigt eine mit t3 bezeichnete Zeit, um zum zweiten Transponder zu gelangen, wird dort vom Hilfsträger genommen und in der Zeit t4 zum Funk­ schlüssel gesandt. Dort erfolgt, wie an sich üblich, die Umsetzung des Fragecodesignals und Aussendung des Anwortcodesignals, das nach Ablauf der Zeit t2 zum zweiten Transponder gelangt. Dort wird es wiederum auf einen bzw. den Hilfsträger gesetzt und zum ersten Transponder gesandt. Die Zeit hierfür ist mit t5 bezeichnet. Der zweite Transponder schließ­ lich sendet das "reine" Antwortcodesignal zum Kraftfahrzeug. Die Zeit hierfür ist mit t6 bezeich­ net.In an extreme case, manipulation could still occur. This is shown in the system overview. Two transponders are essential, which serve as a "radio bridge" between the motor vehicle and the radio key. The range of the question code signal (t 1 ) and / or the answer code signal (t 2 ) is extended with the aid of these two transponders. The question code signal is converted with the aid of the first transponder to a code signal which is seated on an auxiliary carrier. This code signal requires a time designated t 3 to get to the second transponder, is taken there by the subcarrier and sent to the radio key in time t 4 . There, as is customary per se, the question code signal is converted and the response code signal is transmitted, which reaches the second transponder after the time t 2 . There it is in turn placed on one or the auxiliary carrier and sent to the first transponder. The time for this is designated t 5 . The second transponder finally sends the "pure" response code signal to the motor vehicle. The time for this is denoted by t 6 .

Die Erfindung macht sich nun die mit der Verlänge­ rung der Reichweite verbundene zeitliche Verzögerung für den Eingang des Antwortcodesignals im statio­ nären Transponder des Kraftfahrzeugs zu nutze. Es wird für den Eingang des Anwortcodesignals im stationären Transponder nur ein Zeitfenster vorge­ sehen, das zwar ausreicht, das Antwortcodesignal bzw. dessen Anfang dann aufzunehmen, wenn eine zulässige Kommunikation, d. h. mit einem in der Nähe des Kraftfahrzeuge angeordneten mobilen Transponder (=Funkschlüssel) erfolgt. Antwortcodesignale, die nach Ablauf des Zeitfensters im stationären Transponder eingehen, werden nicht mehr berücksich­ tigt. Das bedeutet aber, daß das bei der Manipula­ tion erst nach Ablauf der Zeit t6 im Kraftfahrzeug eingehende Antwortcodesignal nicht mehr berücksich­ tigt wird. Manipulationen in der dargestellten Form können daher ausgeschlossen werden. Sie ermöglichen nicht eine unberechtigte Benutzung des Kraftfahr­ zeugs.The invention now makes use of the time delay associated with the extension of the range for the input of the response code signal in the stationary transponder of the motor vehicle. There will only be a time window for the receipt of the response code signal in the stationary transponder, which is sufficient to record the response code signal or its beginning when there is permissible communication, ie with a mobile transponder (= radio key) arranged near the motor vehicle . Response code signals that arrive in the stationary transponder after the time window has expired are no longer taken into account. However, this means that the response code signal received in the manipulation only after the time t 6 in the motor vehicle is no longer taken into account. Manipulations in the form shown can therefore be excluded. They do not allow unauthorized use of the motor vehicle.

Claims (6)

1. Sicherheitseinrichtung für Kraftfahrzeuge nach Patent .......... (Patentanmeldung P 40 03 280.9), dadurch gekennzeichnet, daß der stationäre Transponder nur innerhalb eines definierten Zeitfensters nach Aussenden des Fragecodesignals zum Empfang des Antwortcode­ signals bereit ist.1. Safety device for motor vehicles according to patent .......... (patent application P 40 03 280.9), characterized in that the stationary transponder is only ready to receive the response code signal within a defined time window after sending out the question code signal. 2. Sicherheitseinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Lage des Zeitfensters beim erstmaligen Dialog bestimmt ist.2. Safety device according to claim 1, characterized characterized that the location of the time window is determined during the first dialogue. 3. Sicherheitseinrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Lage die Zeitfensters fest ist.3. Safety device according to claim 1 or 2, characterized in that the location of the Time window is fixed. 4. Sicherheitseinrichtung nach Anspruch 3, dadurch gekennzeichnet, daß das Zeitfenster durch die Laufzeit von Frage- und Antwortcodesignal bei einem unmittelbar in der Nähe des Kraftfahr­ zeuge angeordneten tragbaren Transponder gegeben ist.4. Safety device according to claim 3, characterized characterized in that the time window through the Runtime of question and answer code signal at one in the immediate vicinity of the motor vehicle witness arranged portable transponder given is. 5. Sicherheitseinrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Lage des Zeitfensters in vorgegebener Weise variabel ist. 5. Safety device according to claim 1 or 2, characterized in that the location of the Time window variable in a given way is.   6. Sicherheitseinrichtung nach Anspruch 5, dadurch gekennzeichnet, daß die Lage des Zeitfensters durch einen Laufzeitbefehl bestimmt ist, der bei Aussenden des Fragecodesignals ausgesandt wird.6. Safety device according to claim 5, characterized characterized that the location of the time window is determined by a runtime command that sent out when the question code signal is sent becomes.
DE4020445A 1990-02-03 1990-06-27 Safety device for motor vehicles Expired - Lifetime DE4020445C2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE4003280A DE4003280C5 (en) 1990-02-03 1990-02-03 Safety device for motor vehicles
DE4020445A DE4020445C2 (en) 1990-02-03 1990-06-27 Safety device for motor vehicles

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4003280A DE4003280C5 (en) 1990-02-03 1990-02-03 Safety device for motor vehicles
DE4020445A DE4020445C2 (en) 1990-02-03 1990-06-27 Safety device for motor vehicles

Publications (2)

Publication Number Publication Date
DE4020445A1 true DE4020445A1 (en) 1992-01-02
DE4020445C2 DE4020445C2 (en) 1998-12-03

Family

ID=6399407

Family Applications (3)

Application Number Title Priority Date Filing Date
DE4003280A Expired - Lifetime DE4003280C5 (en) 1990-02-03 1990-02-03 Safety device for motor vehicles
DE4020445A Expired - Lifetime DE4020445C2 (en) 1990-02-03 1990-06-27 Safety device for motor vehicles
DE59009066T Expired - Lifetime DE59009066D1 (en) 1990-02-03 1990-12-21 Safety device for motor vehicles.

Family Applications Before (1)

Application Number Title Priority Date Filing Date
DE4003280A Expired - Lifetime DE4003280C5 (en) 1990-02-03 1990-02-03 Safety device for motor vehicles

Family Applications After (1)

Application Number Title Priority Date Filing Date
DE59009066T Expired - Lifetime DE59009066D1 (en) 1990-02-03 1990-12-21 Safety device for motor vehicles.

Country Status (3)

Country Link
EP (1) EP0440974B2 (en)
DE (3) DE4003280C5 (en)
ES (1) ES2071738T5 (en)

Cited By (22)

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DE19528445A1 (en) * 1994-08-03 1996-02-29 Mitsubishi Electric Corp Read/write unit for non-contact integrated circuit smart card
DE19531219C1 (en) * 1995-08-24 1996-12-05 Siemens Ag Vehicle anti-theft arrangement
DE19608777A1 (en) * 1996-03-07 1997-09-11 Telefunken Microelectron Road vehicle identification system
WO2000006858A1 (en) 1998-07-29 2000-02-10 Bayerische Motoren Werke Aktiengesellschaft A security system
GB2340169A (en) * 1998-07-29 2000-02-16 Rover Group A security system
EP0983916A1 (en) * 1998-09-02 2000-03-08 Marquardt GmbH Locking system, in particular for a motor vehicle
WO2000012846A1 (en) * 1998-08-27 2000-03-09 Robert Bosch Gmbh Security system
DE19854128A1 (en) * 1998-11-24 2000-05-31 Mannesmann Vdo Ag Method for unlocking an object, in particular a motor vehicle
EP1006248A1 (en) * 1998-12-04 2000-06-07 Siemens Aktiengesellschaft Remote-controlled access control device, in particular for a motor vehicle and portable transponder therefor
DE19941346A1 (en) * 1999-08-31 2001-03-01 Mannesmann Vdo Ag Security device
WO2001029352A1 (en) * 1999-10-16 2001-04-26 Volkswagen Aktiengesellschaft Method and device for controlling entry into a secured location, especially into a motor vehicle
EP0823520A3 (en) * 1996-08-08 2001-05-23 DaimlerChrysler AG Authentication device with electronic authentication communication
DE10004213A1 (en) * 2000-02-01 2001-08-02 Daimler Chrysler Ag Method for controlling the movement of at least one electromotive part of a motor-driven vehicle
DE10005503A1 (en) * 2000-02-08 2001-08-16 Atmel Germany Gmbh Increasing manipulation security for bidirectional, contactless data transfer for car door lock
EP1152107A1 (en) * 2000-05-03 2001-11-07 Delphi Technologies, Inc. Anti-fraud system for hands-free access to an automobile
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EP0440974B1 (en) 1995-05-10
DE4003280C2 (en) 1998-10-15
ES2071738T5 (en) 1999-12-16
ES2071738T3 (en) 1995-07-01
EP0440974A1 (en) 1991-08-14
EP0440974B2 (en) 1999-10-06
DE4003280A1 (en) 1991-08-08
DE4003280C5 (en) 2007-06-28
DE4020445C2 (en) 1998-12-03
DE59009066D1 (en) 1995-06-14

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