DE10300778A1 - Tire pressure monitoring device for a motor vehicle - Google Patents
Tire pressure monitoring device for a motor vehicle Download PDFInfo
- Publication number
- DE10300778A1 DE10300778A1 DE2003100778 DE10300778A DE10300778A1 DE 10300778 A1 DE10300778 A1 DE 10300778A1 DE 2003100778 DE2003100778 DE 2003100778 DE 10300778 A DE10300778 A DE 10300778A DE 10300778 A1 DE10300778 A1 DE 10300778A1
- Authority
- DE
- Germany
- Prior art keywords
- control device
- air pressure
- tire air
- pressure control
- tire
- 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.)
- Ceased
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C23/00—Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
- B60C23/02—Signalling devices actuated by tyre pressure
- B60C23/04—Signalling devices actuated by tyre pressure mounted on the wheel or tyre
- B60C23/0408—Signalling devices actuated by tyre pressure mounted on the wheel or tyre transmitting the signals by non-mechanical means from the wheel or tyre to a vehicle body mounted receiver
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C23/00—Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
- B60C23/02—Signalling devices actuated by tyre pressure
- B60C23/04—Signalling devices actuated by tyre pressure mounted on the wheel or tyre
- B60C23/0408—Signalling devices actuated by tyre pressure mounted on the wheel or tyre transmitting the signals by non-mechanical means from the wheel or tyre to a vehicle body mounted receiver
- B60C23/0422—Signalling devices actuated by tyre pressure mounted on the wheel or tyre transmitting the signals by non-mechanical means from the wheel or tyre to a vehicle body mounted receiver characterised by the type of signal transmission means
- B60C23/0433—Radio signals
- B60C23/0447—Wheel or tyre mounted circuits
- B60C23/045—Means for detecting electromagnetic field changes being not part of the signal transmission per se, e.g. strength, direction, propagation or masking
-
- 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
- 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
- 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)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Electromagnetism (AREA)
- Computer Networks & Wireless Communication (AREA)
- General Physics & Mathematics (AREA)
- Measuring Fluid Pressure (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
Die Erfindung betrifft eine Reifenluftdruck-Kontrolleinrichtung für ein Kraftfahrzeug mit mehreren mit je einem Luftreifen ausgerüsteten Rädern, umfassend zumindest ein mit einer HF-Sende/Empfangseinrichtung versehenes Steuergerät sowie an jedem überwachten Luftreifen vorhandene, mit einem Druckmessmodul gekoppelte und zur bidirektionalen Kommunikation mit dem zentralen Steuergerät vorgesehene HF-Sende/Empfangseinrichtungen. DOLLAR A Vorteilhaft im Vergleich zum Stand der Technik ist bei dieser Einrichtung, dass eine Positionsbestimmung sowohl der Räder des Fahrzeugs als auch weiterer mit HF-Sende/Empfangseinrichtungen versehener Komponenten wie etwa denen eines tragbaren ID-Gebers einer schlüssellosen Zugangs- bzw. Fahrberechtigungs-Kontrolleinrichtung zu einem beliebigen Zeitpunkt möglich ist. DOLLAR A Dies wird dadurch erreicht, daß die HF-Sende/Empfangseinrichtungen zusätzlich mit Mitteln versehen sind, die die Bestimmung des Abstandes zwischen jeweils zwei HF-Sende/Empfangseinrichtungen ermöglichen.The invention relates to a tire air pressure control device for a motor vehicle with a plurality of wheels each equipped with a pneumatic tire, comprising at least one control unit provided with an HF transceiver and to each pneumatic tire monitored and coupled to a pressure measurement module and for bidirectional communication with the central control unit intended RF transmitters / receivers. DOLLAR A Compared to the prior art, this device has the advantage that the position of both the wheels of the vehicle and other components provided with HF transceivers, such as those of a portable ID transmitter of a keyless entry or driving authorization control device, is determined is possible at any time. DOLLAR A This is achieved in that the RF transmit / receive devices are additionally provided with means which enable the distance between two RF transmit / receive devices to be determined.
Description
Die Erfindung betrifft eine Reifenluftdruck-Kontrolleinrichtung für ein Kraftfahrzeug mit mehreren mit je einem Luftreifen ausgerüsteten Rädern, umfassend zumindest ein mit einer HF-Sende/Empfangseinrichtung versehenes Steuergerät sowie an jedem überwachten Luftreifen vorhandene, mit einem Druckmessmodul gekoppelte und zur bidirektionalen Kommunikation mit dem zentralen Steuergerät vorgesehene HF-Sende/Empfangseinrichtungen.The invention relates to a tire air pressure control device for a Motor vehicle with several wheels each equipped with a pneumatic tire, comprising at least one provided with an RF transceiver control unit as well as monitored at everyone Pneumatic tires available, coupled with a pressure measuring module and for provided bidirectional communication with the central control unit RF transmitting / receiving devices.
Derartige Reifenluftdruck-Kontrollsysteme finden immer häufiger, auch durch den Gesetzgeber gefordert, Einsatz in Kraftfahrzeugen. In heutigen Fahrzeugen kommen verschiedenartige Systeme zum Einsatz: Teilweise werden die Sensoren in den einzelnen Rädern durch induktive Felder gezielt geweckt. Dabei ist jedem Rad ein induktiver Sender zugeordnet, welcher i.d.R. im Radkasten bzw. dessen Nähe angeordnet ist und den NF-Empfänger des entsprechenden Rades ansteuert. Die Übermittlung des eigentlichen Druckwertes erfolgt dann mittels eines hochfrequenten Trägers. Dieses HF-Signal wird dann entweder über einzelne, den jeweiligen Rädern zugeordnete und z.B. in den Radkästen vorhandene HF-Empfänger empfangen, oder sie werden mittels mindestens eines im Fahrzeug angeordneten HF-Empfängers empfangen zur weiteren Verarbeitung in einem Steuergerät. Andere Systeme verzichten aus Kostengründen auf die spezifische Ansteuerung eines Rades per niederfrequentem, induktivem Signal zum Zwecke der Druckwertübermittlung. Stattdessen senden diese Reifendrucksensoren die Informationen nur aufgrund von Druckschwankungen, oder durch Beschleunigungssensoren oder zeitlich gesteuert per Funk an einen oder mehrere Empfänger im Fahrzeug.Find such tire pressure monitoring systems more frequently, also required by law, use in motor vehicles. Various types of systems are used in today's vehicles: Some of the sensors in the individual wheels are caused by inductive fields deliberately awakened. Each wheel is assigned an inductive transmitter which usually is arranged in the wheel arch or its vicinity and the NF receiver of the controls the corresponding wheel. The transmission of the actual The pressure is then measured using a high-frequency carrier. This RF signal is then either over individual, the respective wheels assigned and e.g. in the wheel arches receive existing RF receivers, or they are received by means of at least one RF receiver arranged in the vehicle for further processing in a control unit. No other systems for cost reasons on the specific control of a wheel by low-frequency, inductive signal for the purpose of pressure value transmission. Send instead these tire pressure sensors the information only due to pressure fluctuations, or by means of acceleration sensors or time-controlled by radio to one or more recipients in the vehicle.
Die
Heutige Fahr- und Zugangsberechtigungs-Kontrollsysteme (z.B. KeylessGo) bestehen aus unterschiedlichen Funktionsblöcken; so findet in aller Regel ein bidirektionaler Datenaustausch zwischen dem Fahrzeug und einem ID-Geber statt, welcher mit Hilfe niederfrequenter und/oder hochfrequenter Signale durchgeführt wird. Bei höhenwertigen Systemen ist eine Ausstattung des Fahrzeugs mit mehreren niederfrequenten induktiven Sendespulen üblich. Über diese Spulen, welche an bestimmten Positionen im Fahrzeug angebracht sind, wird das NF-Signal ausgesendet, welches wiederum von einem ID-Geber empfangen wird. Abhängig von der Empfangsfeldstärke am Ort des ID-Gebers bzw. der Stärke des empfangenen Signals im ID-Geber kann dann auf eine relative oder sogar absolute Position zum Fahrzeug geschlossen werden. Diese Positionsbestimmung im ID-Geber kann dann wiederum dem Fahrzeug mitgeteilt werden, wodurch bestimmte Funktionen gesteuert werden.Today's driving and access authorization control systems (e.g. KeylessGo) consist of different function blocks; so there is usually a bidirectional data exchange between the vehicle and an ID transmitter, which with the help of low-frequency and / or high-frequency signals is carried out. With high quality Systems is equipment of the vehicle with several low-frequency inductive transmitter coils common. About these Coils, which are attached to certain positions in the vehicle the LF signal is transmitted, which in turn is received by an ID transmitter becomes. Dependent on the reception field strength at the location of the ID transmitter or the strength the received signal in the ID transmitter can then be relative or even absolute position to the vehicle. This Position determination in the ID transmitter can then turn the vehicle be communicated through which certain functions are controlled.
So kann z.B. die Feststellung, ob sich der ID-Geber innerhalb oder außerhalb des Fahrzeugs befindet, dazu benutzt werden, zu entscheiden, ob eine Startfreigabe des Motors erteilt wird oder nicht. Weiterhin kann z.B. die Öffnung einer bestimmten Tür von der Position des ID-Gebers relativ zum Fahrzeug abhängig gemacht werden (rechts oder links).For example, determining whether the ID transmitter is inside or outside the vehicle, used to decide whether to enable the engine to start is granted or not. Furthermore e.g. the opening of a certain door made dependent on the position of the ID transmitter relative to the vehicle be (right or left).
Die Reifenluftdruck-Kontrolleinrichtung nach der vorliegenden Erfindung hat gegenüber dem Stand der Technik den Vorteil, eine Positionsbestimmung eines jeweiligen Rades zu einem beliebigen Zeitpunkt zu ermöglichen, so daß auch nach einem Vertauschen der Räder stets sichergestellt ist, daß die richtige Zuordnung des Luftdruckwertes zu der jeweiligen Radposition gegeben ist. Darüberhinaus ermöglicht die Einrichtung auch die Positionsbestimmung weiterer mit HF-Sende/Empfangseinrichtungen versehener Komponenten wie etwa eines tragbaren ID-Gebers einer schlüssellosen Zugangs- bzw. Fahrberechtigungskontrolleinrichtung.The tire air pressure control device according to the present invention compared to the prior art Advantage of determining the position of a respective wheel in relation to one to allow any point in time so that too after swapping the wheels it is always ensured that the correct allocation of the air pressure value to the respective wheel position given is. Furthermore allows the device also determines the position of other RF transmitters / receivers provided components such as a portable ID transmitter keyless Access or driving authorization control device.
Dies wird dadurch erreicht, daß die HF-Sende/Empfangseinrichtungen zusätzlich mit Mitteln versehen sind, die die Bestimmung des Abstandes zwischen jeweils zwei HF-Sende/Empfangseinrichtungen ermöglichen.This is achieved in that the RF transceivers additionally are provided with means for determining the distance between Allow two RF transmitters / receivers.
Durch die Bestimmung der Abstände der HF-Sende/Empfangseinrichtungen der Räder zu zumindest einer im Fahrzeug außermittig und asymmetrisch positionierten HF-Sende/Empfangseinrichtung oder durch Bestimmung mehrerer solcher Abstände zu verschiedenen HF-Sende/Empfangseinrichtungen ist eine Positionsbestimmung des jeweiligen Rades relativ zum Fahrzeug möglich. Zusätzlich kann eine Abstandsmessung der Räder untereinander vorgenommen werden. Ebenso ist die eindeutige Bestimmung der Position eines ID-Gebers relativ zum Fahrzeug möglich, indem dessen jeweiliger Abstand zu zumindest drei in ihrer Postion bezüglich des Fahrzeugs bekannten HF-Sende/Empfangseinrichtungen bestimmt wird.By determining the distances between the RF transmitters / receivers of the wheels at least one off-center and asymmetrical in the vehicle positioned RF transceiver or by determination several such distances different RF transmitters / receivers is a position determination of the respective wheel relative to the vehicle. In addition, a distance measurement of the wheels among themselves. The same is true the position of an ID transmitter relative to the vehicle possible by its respective distance to at least three in their position with respect to the vehicle known RF transmitters / receivers is determined.
Ein weiterer Vorteil der erfindungsgemäßen Einrichtung gegenüber dem Stand der Technik besteht überdies in einem verbesserten Schutz gegenüber Manipulationsversuchen von außen, wobei etwa ein Fahrer durch eine von außerhalb des Fahrzeugs veranlaßte, fälschliche Anzeige eines Reifendruckverlustes in Diebstahlsabsicht zum Anhalten bestimmt wird.Another advantage of the device according to the invention over the prior art is, moreover, improved protection against via attempts at manipulation from the outside, for example a driver being determined to stop by an incorrect display of a tire pressure loss caused by theft from outside the vehicle.
Die Abstandsmessung erfolgt bei der
erfindungsgemäßen Einrichtung
z.B. durch die Ermittlung einer Signallaufzeit. Die Signallaufzeit
kann dabei etwa durch ein einen Vergleich der Modulationsvariablen
einer modulierten Trägerwelle
beinhaltendes Verfahren bestimmt werden, wie es in der
Die Erfindung wird im folgenden anhand des in der Zeichnung schematisch dargestellten Ausführungsbeispiels näher erläutert.The invention is illustrated below of the embodiment shown schematically in the drawing explained in more detail.
Das zentrale Steuergerät Z1 sowie
optionale weitere Steuergeräte
Z2,... befinden sich ebenso, wie die vier Räder VL, VR, HL, HR bezüglich des
Fahrzeugs
Zur Positionsbestimmung eines einem schlüssellosen
Zugangsberechtigungssystems zugehörigen ID-Gebers
Da bei einem Fahrzeug die Eckpunkte
der Karosse die am weitesten voneinander entfernten Punkte darstellen,
kommen die Radpositionen dieser Forderung in beinahe idealer Weise
nach. Die Räder sind
jeweils mit einer dem Reifenluftdruck-Kontrollsystem zugehörigen Sensor-Elektronik
sowie einer HF-Sende/Empangseinrichtung, die die Möglichkeit der
bidirektionalen Kommunikation bietet, ausgestattet. Darüberhinaus
verfügen
sie jeweils über
eine Einrichtung zur Messung der Abstände zu anderen HF-Sende/Empangseinrichtungen.
Wird nun von allen 4 Rädern
eine Abstandsmessung zu einem in der unbekannten Position (x,y,z)
befindlichen ID-Geber vorgenommen, so können die jeweils ermittelten
Abstände
L1, L2, L3 und L4 zwischen dem betreffenden Rad und dem ID-Geber
Durch diese 4 Abstands-Informationen
kann dann eine eindeutige Aussage über die Position (x,y,z) des
ID-Gebers
Eine Anwendung der Positionsbestimmung des ID-Gebers kann natürlich auch die Unterscheidung der Position zwischen Innen- und Außenbereich des Fahrzeugs sein. Es kann jedoch auch schon bei Annäherung eines Nutzers/Trägers des ID-Gebers dessen Richtung vom Fahrzeug erkannt werden, und abhängig von dieser Richtung nur die entsprechend selektierte Tür geöffnet werden, z.B. die Fahrertür oder der Kofferraum.An application of the position determination of the ID transmitter can of course also differentiating the position between indoor and outdoor of the vehicle. However, it can also occur when one approaches User / carrier of the ID transmitter whose direction is recognized by the vehicle, and depending on only the correspondingly selected door is opened in this direction, e.g. the driver's door or the trunk.
Jegliche andere Steuerungen in Abhängigkeit der Position des ID-Gebers, oder aber der Richtung der Annäherung oder des Entfernens des ID-Gebers vom Fahrzeug, sind damit denkbar.Any other controls depending the position of the ID transmitter, or the direction of approach or removal of the ID transmitter from the vehicle are conceivable.
Die Möglichkeit, die Position der Räder bezüglich des Fahrzeugs zu ermitteln eröffnet auch Anwendungen im Rahmen einer Diebstahlwarnanlage, indem Manipulationen an den Rädern, wie z.B. das unerlaubte Entfernen derselben vom Fahrzeug registriert werden und zu einer entsprechenden Anzeige bzw. zu einer Alarmauslösung herangezogen werden können.The possibility of the position of the wheels Determining the vehicle also opens up applications in the context of an anti-theft alarm system in that manipulations on the wheels, such as the unauthorized removal of the same from the vehicle, are registered and can be used for a corresponding display or for triggering an alarm.
Claims (6)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2003100778 DE10300778A1 (en) | 2003-01-11 | 2003-01-11 | Tire pressure monitoring device for a motor vehicle |
PCT/EP2004/000097 WO2004062948A1 (en) | 2003-01-11 | 2004-01-09 | Tyre pressure monitoring device for a motor vehicle |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2003100778 DE10300778A1 (en) | 2003-01-11 | 2003-01-11 | Tire pressure monitoring device for a motor vehicle |
Publications (1)
Publication Number | Publication Date |
---|---|
DE10300778A1 true DE10300778A1 (en) | 2004-07-22 |
Family
ID=32519841
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE2003100778 Ceased DE10300778A1 (en) | 2003-01-11 | 2003-01-11 | Tire pressure monitoring device for a motor vehicle |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE10300778A1 (en) |
WO (1) | WO2004062948A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102017206361A1 (en) * | 2017-04-13 | 2018-10-18 | Continental Automotive Gmbh | Access system and access control method for a vehicle |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0791488A1 (en) * | 1995-09-01 | 1997-08-27 | Fast Air, S.L. | Method and system for measuring and adjusting pressure of tyres |
DE19720123A1 (en) * | 1997-01-17 | 1998-07-23 | Doduco Gmbh | Method and device for transmitting telecontrol commands and measurement data to one or more actuators or monitoring devices in an automobile |
DE10012113A1 (en) * | 2000-03-13 | 2001-10-04 | Siemens Ag | Data transmission and/or distance measurement between base unit and mobile key unit of access authorization monitoring system involves modulating carrier signal with identification signal |
DE10014076A1 (en) * | 2000-03-22 | 2001-10-04 | Nolex Ag St Moritz | Tire Air Pressure Indicator |
DE10032936A1 (en) * | 2000-07-06 | 2002-02-07 | Siemens Ag | Car security system has two antennas improves code unit location and security |
EP1211104A2 (en) * | 2000-11-29 | 2002-06-05 | Trw Inc. | Vehicle communication for tire sensor initiation and vehicle keyless entry via a shared resource |
DE10203624A1 (en) * | 2001-01-31 | 2002-08-01 | Lear Corp | System and method for joint monitoring of a vehicle's tire pressure, remote keyless entry and vehicle immobilization |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2816775A1 (en) * | 2000-11-10 | 2002-05-17 | Michelin Soc Tech | Vehicle wheel tyre monitor system comprises first and second radio reception chain defining axis, and comparator determining phase relationships with result processing position relative to antenna |
-
2003
- 2003-01-11 DE DE2003100778 patent/DE10300778A1/en not_active Ceased
-
2004
- 2004-01-09 WO PCT/EP2004/000097 patent/WO2004062948A1/en active Application Filing
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0791488A1 (en) * | 1995-09-01 | 1997-08-27 | Fast Air, S.L. | Method and system for measuring and adjusting pressure of tyres |
DE19720123A1 (en) * | 1997-01-17 | 1998-07-23 | Doduco Gmbh | Method and device for transmitting telecontrol commands and measurement data to one or more actuators or monitoring devices in an automobile |
DE10012113A1 (en) * | 2000-03-13 | 2001-10-04 | Siemens Ag | Data transmission and/or distance measurement between base unit and mobile key unit of access authorization monitoring system involves modulating carrier signal with identification signal |
DE10014076A1 (en) * | 2000-03-22 | 2001-10-04 | Nolex Ag St Moritz | Tire Air Pressure Indicator |
DE10032936A1 (en) * | 2000-07-06 | 2002-02-07 | Siemens Ag | Car security system has two antennas improves code unit location and security |
EP1211104A2 (en) * | 2000-11-29 | 2002-06-05 | Trw Inc. | Vehicle communication for tire sensor initiation and vehicle keyless entry via a shared resource |
DE10203624A1 (en) * | 2001-01-31 | 2002-08-01 | Lear Corp | System and method for joint monitoring of a vehicle's tire pressure, remote keyless entry and vehicle immobilization |
Non-Patent Citations (2)
Title |
---|
DUVENHAGE,Fanie: Schlüsselloser Zugang und Reifendruckmessung mit nur einem Mikrocontroller. In: Elektronik Informationen, Nr.11,2002,S.82-84 * |
DUVENHAGE,Fanie: Schlüsselloser Zugang und Reifendruckmessung mit nur einem Mikrocontroller. In: Elektronik Informationen, Nr.11,2002,S.82-84; |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102017206361A1 (en) * | 2017-04-13 | 2018-10-18 | Continental Automotive Gmbh | Access system and access control method for a vehicle |
Also Published As
Publication number | Publication date |
---|---|
WO2004062948A1 (en) | 2004-07-29 |
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