EP0391977A1 - Device for transmitting and evaluating measurement signals for tyre pressure in motor vehicles - Google Patents

Device for transmitting and evaluating measurement signals for tyre pressure in motor vehicles

Info

Publication number
EP0391977A1
EP0391977A1 EP19890901843 EP89901843A EP0391977A1 EP 0391977 A1 EP0391977 A1 EP 0391977A1 EP 19890901843 EP19890901843 EP 19890901843 EP 89901843 A EP89901843 A EP 89901843A EP 0391977 A1 EP0391977 A1 EP 0391977A1
Authority
EP
European Patent Office
Prior art keywords
coil
rim
transmitter coil
hub
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.)
Ceased
Application number
EP19890901843
Other languages
German (de)
French (fr)
Inventor
Günter Schmid
Michael Genzel
Gerhard Hettich
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0391977A1 publication Critical patent/EP0391977A1/en
Ceased legal-status Critical Current

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
    • B60C23/005—Devices specially adapted for special wheel arrangements
    • B60C23/007—Devices specially adapted for special wheel arrangements having multiple wheels arranged side by side
    • 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
    • B60C23/0427—Near field transmission with inductive or capacitive coupling means
    • B60C23/0428—Near field transmission with inductive or capacitive coupling means using passive wheel mounted resonance circuits

Definitions

  • the invention is directed to a device for transmitting and evaluating measurement signals for the tire pressure of tubeless tires mounted on rims in the case of single and twin wheels of motor vehicles, comprising a pressure sensor arranged in the rim wall, which is electrically connected to a signal transmitter coil arranged on the rim and an RF oscillating circuit signal evaluation arrangement with a signal pick-up coil that is fixedly connected to the motor vehicle in the region of the axis.
  • Such a device is known for example from DE-OS 35 41 529.
  • the problem is already solved, a signal transmission independent of a swap of individual to be able to manage bikes.
  • signal transmission when the vehicle is stationary is not possible.
  • this is also of considerable importance in practical operation, because the driver should receive a warning signal before the start of the journey if the tire pressure is no longer at the required level after a break.
  • the invention is based on the object of designing a device of the type mentioned at the outset such that a structurally simple, reliable pressure signal transmission can be achieved both in the case of single and twin tires and also in the idle state.
  • a first transmitter coil is arranged in the area of the signal transmitter coil on the hub that carries the rim and is connected to it in a rotationally fixed manner.
  • the first transmitter coil is electrically connected to a second transmitter coil, the latter being designed as a ring coil.
  • the coil axis of which lies in the hub axis, and the signal pick-up coil of the fixed RF oscillating circuit signal evaluation arrangement is arranged in the magnetic field region of the second transmitter coil.
  • the second transmitter coil Due to the arrangement and design of the second transmitter coil, it is ensured that a measurement signal transmission from the sensor to the evaluation arrangement takes place not only in certain angular positions and accordingly only when the wheel is turned, that a continuous measurement signal transmission is guaranteed because "the signal transmitter coil and the first transmitter coil are not rotated relative to each other and the second transmitter coil can transmit signal to the evaluation arrangement independently of its angular position. All that is needed is the evaluation arrangement or the HF -Gender and receiving part of the evaluation arrangement to be magnetically coupled to the transmitter coil.
  • the signal transmitter coil and the first transmitter coil are arranged in the region of the rim pot base.
  • the rim is mechanically connected to the hub i by screws, so that in this area the close spatial proximity of the two coils, which is desirable for a safe transmission from the signal transmitter coil to the first transmitter coil, can also be realized.
  • mechanical locking devices are arranged on the rim or on the hub in such a way that the rim can only be mounted in a defined angular position relative to the hub. This ensures that when the rim is mounted on the hub, less knowledgeable or strange personnel ensure that the signaling coil and the first transmitter coil are preferably arranged opposite one another in a spatially adjacent manner.
  • a pin and a hole are already provided on the hub or rim, so that the rim bores when the rim is attached align with the threaded holes in the hub to insert the screw.
  • the device according to the invention can also be used with twin tires, it is provided that the signal transmitter coils of the inner and outer wheels are aligned with the first transmitter coil attached to the hub and thus form a magnetically coupled system. In this way it is possible to transmit the signals of the signal transmitter coil of the external and internal twin wheel to the first transmitter coil and from there to the second transmitter coil and thus also to the evaluation arrangement. Because of the design of the device according to the invention, an individual wheel and a twin wheel can be exchanged and monitored for one another.
  • the evaluation device has a discriminator arrangement for distinguishing at least three different frequency levels and for emitting corresponding output signals. These three different frequency levels are set as a function of whether only one of the pressure sensors designed as a pressure switch, for example, or both pressure sensors respond, or whether neither of the pressure switches is switched on.
  • the different frequencies when one or two pressure switches are switched on result from the fact that when the pressure sensors respond, the impedance at the first transmitter coil changes, which leads to a change in the resonance frequency due to detuning of the resonant circuit.
  • FIG. 1 is a schematic sectional view of an individual wheel of a motor vehicle with a device according to the invention
  • FIG. 1 is a schematic circuit diagram of the arrangement shown in FIG. 1,
  • Fig. 3 is a schematic sectional view of an inventive device on a twin wheel
  • Fig. 4 is a Fig. 3 corresponding schematic electrical circuit arrangement.
  • a wheel of a motor vehicle in particular a truck is shown.
  • the wheel 1 comprises a tubeless tire 2 which is on a Rim 3 is mounted.
  • a pressure sensor 6 which, in the simplest case, is a pressure-dependent switch which opens as soon as the air pressure in the tire 2 falls below a limit value.
  • This pressure sensor 6 is electrically connected to a signal transmitter coil 8 via a stainless steel line 7.
  • a pin 13 is provided on the hub 12, which engages in only a single corresponding bore 14 on the rim pot base 9.
  • the signal transmitter coil 8 formed with a U-shaped core directed towards the hub 12 comes to lie directly over a first transmitter coil 15 arranged on the hub 12 with a U-core directed towards the rim 3, " which is arranged in such a way that the axis of symmetry 10 of its core lies parallel to the longitudinal axis 11 of the hub 12.
  • the first transmitter coil 15 is connected via a line 16 to a second transmitter coil 17 designed as a ring coil.
  • the second transmitter coil 17 has an axis 18, which coincides with the axis 11 of the hub 12.
  • the evaluation arrangement 20 is attached to a wheel suspension or axle 19, which is designed in a conventional manner and is therefore only shown schematically, and which is non-rotatable and rotatably supports the hub 12, ie at least one RF receiver coil of the evaluation arrangement 20. This is arranged in the circumferential area of the ring coil forming the second transmitter coil 17 and is magnetically coupled to it.
  • a signal discriminator arrangement 21 is connected downstream of the receiver coil 2o or integrated therein.
  • FIG. 3 two Fig. 1 corresponding wheels 1 are combined into a so-called twin tire.
  • the components corresponding to FIG. 1 are identified in FIG. 3 by the same reference numerals, the parts designated with in each case belonging to the outer running un and the parts marked with b each belonging to the inner running twin tires.
  • the first transformer coils 15a, 15b lie directly next to one another and, accordingly, twice as wide on the hub 11 Arranged transmitter coil 17 are magnetically coupled, so that then signals of the Druck ⁇ sensor 6a from the wheel la via the signal transmitter coil 8 through the first transmitter coil 15 to the associated second transmitter coil 17 and the evaluation arrangement are transmitted.
  • the frequency discriminator 21 can output different output signals which enable the alarm to be displayed when the tire pressure in one or both tires falls below the setpoint.

Abstract

Un dispositif de transmission et d'évaluation de signaux de mesure de la pression de pneus sans chambre montés sur la jante de roues individuelles ou jumelées de véhicules à moteur comprend un manomètre (6) monté sur la paroi de la jante et électriquement connecté à une bobine génératrice de signaux (8), ainsi qu'une bobine réceptrice de signaux (20) fixée au niveau de l'essieu du véhicule et faisant partie d'un agencement d'évaluation de signaux à circuit résonant à haute fréquence. Afin de permettre la saisie de signaux même lorsque le véhicule est stationnaire et mêmem avec des pneus jumelés, une première bobine de transmission (15) est agencée au niveau de la bobine génératrice de signaux (8) sur le moyeu (12) de support de la jante (3) fixé à celle-ci. La première bobine de transmission (15) est électriquement connectée à une deuxième bobine de transmission (17) qui se présente sous forme d'une bobine toroïdale dont l'axe d'enroulement (18) coïncide avec l'axe (11) du moyeu, la bobine stationnaire (20) réceptrice de signaux étant agencée au niveau de la deuxième bobine de transmission (17).A device for transmitting and evaluating pressure measurement signals from tubeless tires mounted on the rim of single or twin wheels of motor vehicles comprises a pressure gauge (6) mounted on the wall of the rim and electrically connected to a signal generating coil (8) and a signal receiving coil (20) attached to the axle of the vehicle and forming part of a high frequency resonant circuit signal evaluation arrangement. In order to allow signals to be picked up even when the vehicle is stationary and even with twin tires, a first transmission coil (15) is arranged at the level of the signal generating coil (8) on the support hub (12). the rim (3) fixed thereto. The first transmission coil (15) is electrically connected to a second transmission coil (17) which is in the form of a toroidal coil whose winding axis (18) coincides with the axis (11) of the hub , the stationary coil (20) receiving signals being arranged at the level of the second transmission coil (17).

Description

Vorrichtung zur Übertragung und Auswertung von Meßsignalen für den Reifendruck von Kraftfahrzeugen Device for the transmission and evaluation of measurement signals for the tire pressure of motor vehicles
Die Erfindung richtet sich auf eine Vorrichtung zur Übertragung und Auswertung von Meßsignalen für den Reifendruck von auf Felgen aufgezogenen schlauchlosen Reifen bei Einzel- und Zwillingsrädern von Kraftfahr¬ zeugen umfassend einen in der Felgenwand angeordneten Drucksensor, der elektrisch mit einer an der Felge an geordneten Signalgeberspule verbunden ist sowie eine im Bereich der Achse ortsfest mit dem Kraftfahrzeug verbundene HF-Schwingkreis-Signalauswerteanordnung mi einer Signalaufnahmespule.The invention is directed to a device for transmitting and evaluating measurement signals for the tire pressure of tubeless tires mounted on rims in the case of single and twin wheels of motor vehicles, comprising a pressure sensor arranged in the rim wall, which is electrically connected to a signal transmitter coil arranged on the rim and an RF oscillating circuit signal evaluation arrangement with a signal pick-up coil that is fixedly connected to the motor vehicle in the region of the axis.
Eine derartige Vorrichtung ist z.B. aus der DE-OS 35 41 529 bekannt. Bei der vorbekannten Vorrichtung wird zwar bereits das Problem gelöst, eine Signalüber tragung unabhängig von einer Vertauschung von Einzel- rädern bewerkstelligen zu können. Jedoch ist bei der vorbekannten Vorrichtung eine Signalübertragung bei Stillstand des Fahrzeugs nicht möglich. Gerade dies ist aber im praktischen Betrieb auch von einer nicht unwesentlichen Bedeutung, weil der Fahrzeugführer schon vor Fahrtbeginn ein Warnsignal erhalten soll, wenn der Reifendruck nach einer Fahrtpause nicht mehr die erforderliche Höhe aufweist.Such a device is known for example from DE-OS 35 41 529. In the known device, the problem is already solved, a signal transmission independent of a swap of individual to be able to manage bikes. However, in the known device, signal transmission when the vehicle is stationary is not possible. However, this is also of considerable importance in practical operation, because the driver should receive a warning signal before the start of the journey if the tire pressure is no longer at the required level after a break.
Hiervon ausgehend liegt der Erfindung die Aufgabe zu¬ grunde, eine Vorrichtung der eingangs genannten Art s auszugestalten, daß eine konstruktiv einfache, zuver¬ lässige Drucksignalübertragung sowohl bei Einzel- als auch bei Zwillingsreifen auch im Ruhezustand erreich¬ bar ist.Proceeding from this, the invention is based on the object of designing a device of the type mentioned at the outset such that a structurally simple, reliable pressure signal transmission can be achieved both in the case of single and twin tires and also in the idle state.
Diese Aufgabe wird erfindungsgemäß dadurch gelöst, da im Bereich der- Signalgeberspule an der die Felge tra¬ genden, mit dieser drehfest verbundenen Nabe eine erste Übertragerspule angeordnet ist, welche elek¬ trisch mit einer zweiten Übertragerspule verbunden ist, wobei letztere als Ringspule ausgebildet ist, deren Spulenachse in der Nabenachse liegt, und wobei die Signalaufnahmespule der feststehenden HF-Schwing¬ kreis-Signalauswerteanordnung im Magnetfeldbereich de zweiten Übertragerspule angeordnet ist.This object is achieved according to the invention in that a first transmitter coil is arranged in the area of the signal transmitter coil on the hub that carries the rim and is connected to it in a rotationally fixed manner. The first transmitter coil is electrically connected to a second transmitter coil, the latter being designed as a ring coil. the coil axis of which lies in the hub axis, and the signal pick-up coil of the fixed RF oscillating circuit signal evaluation arrangement is arranged in the magnetic field region of the second transmitter coil.
Aufgrund der Anordnung und Ausgestaltung der zweiten Übertragerspule ist sichergestellt, daß eine Meßsig¬ nalübertragung von dem Sensor zur Auswerteanordnung nicht nur in bestimmten Winkelpositionen und dem¬ entsprechend nur beim Drehen des Rades erfolgt, son- dem daß eine kontinuierliche Meßsignalübertragung ge währleistet ist, weil" die Signalgeberspule und die erste Übertragerspule relativ zueinander nicht ver¬ dreht werden und die zweite Übertragerspule unabhängi von ihrer Winkellage Signal auf die Auswerteanordnung übertragen kann. Es braucht dabei lediglich die Aus¬ werteanordnung bzw der HF-Geber- und Empfangsteil der Auswerteanordnung magnetisch mit der Übertragerspule gekoppelt zu sein.Due to the arrangement and design of the second transmitter coil, it is ensured that a measurement signal transmission from the sensor to the evaluation arrangement takes place not only in certain angular positions and accordingly only when the wheel is turned, that a continuous measurement signal transmission is guaranteed because " the signal transmitter coil and the first transmitter coil are not rotated relative to each other and the second transmitter coil can transmit signal to the evaluation arrangement independently of its angular position. All that is needed is the evaluation arrangement or the HF -Gender and receiving part of the evaluation arrangement to be magnetically coupled to the transmitter coil.
In weiterer Ausgestaltung der Erfindung ist vorgese¬ hen, daß die Signalgeberspule und die erste Übertra¬ gerspule im Bereich des Felgentopfbodens angeordnet sind. In diesem Bereich wird die Felge mit der Nabe i üblicher Weise durch Schrauben mechanisch verbunden, so daß in diesem Bereich auch die für eine sichere Übertragung von der Signalgeberspule auf die erste Übertragerspule wünschenswerte enge räumliche Nähe de beiden Spulen realisierbar ist.In a further embodiment of the invention, it is provided that the signal transmitter coil and the first transmitter coil are arranged in the region of the rim pot base. In this area, the rim is mechanically connected to the hub i by screws, so that in this area the close spatial proximity of the two coils, which is desirable for a safe transmission from the signal transmitter coil to the first transmitter coil, can also be realized.
Günstigerweise ist vorgesehen, daß an der Felge bzw. an der Nabe mechanische Rasteinrichtungen derart ange ordnet sind, daß die Felge relativ zur Nabe jeweils nur in einer definierten Winkellage montierbar ist. Hierdurch wird erreicht, daß bei der Montage der Felg auf der Nabe auch durch weniger sachkundiges oder auf merksames Personal gewährleistet ist, daß Signalgeber spule und erste Übertragerspule räumlich benachbart zueinander vorzugsweise einander gegenüberstehend an¬ geordnet sind. Herkömmlicherweise sind an der Nabe bzw. Felge bereits ein Zapfen und ein Loch vorgesehen, um beim Aufstecken der Felge die Bohrungen der Felge mit den Gewindebohrungen der Nabe zum Einstecken der Schraube zur Deckung zai bringen. Zur Realisierung einer erfindungsgemäßen mechanischen Rasteinrichtung braucht demnach z.B. nur noch ein zweiter derartiger Zapfen mit einer korrespondierenden Bohrung vorgesehe zu werden, so daß dann die Felge nur noch in einer einzigen, vorgegebenen Winkellage aufsteckbar ist. Alternativ darf beim Vorsehen nur eines einzigen Zapfens an der Nabe bzw. an der Felge nur eine einzig hierfür passende Bohrung vorgesehen sein.It is advantageously provided that mechanical locking devices are arranged on the rim or on the hub in such a way that the rim can only be mounted in a defined angular position relative to the hub. This ensures that when the rim is mounted on the hub, less knowledgeable or strange personnel ensure that the signaling coil and the first transmitter coil are preferably arranged opposite one another in a spatially adjacent manner. Conventionally, a pin and a hole are already provided on the hub or rim, so that the rim bores when the rim is attached align with the threaded holes in the hub to insert the screw. To implement a mechanical latching device according to the invention, it is therefore only necessary to provide, for example, only a second such pin with a corresponding bore so that the rim can then only be plugged on in a single, predetermined angular position. Alternatively, if only a single pin is provided on the hub or on the rim, only a single hole suitable for this purpose may be provided.
Um ZΛI erreichen, daß die erfindungsgemäße Vorrichtung auch bei Zwillingsreifen eingesetzt werden kann, ist vorgesehen, daß die Signalgeberspulen des inneren und äußeren Rades mit der nabenseitig angebrachten ersten Übertragerspule fluchten und so ein magnetisch gekop¬ peltes System bilden. Auf diese Weise ist eine Über¬ tragung der Signale der Signalgeberspule des außen¬ liegenden und innenliegenden Zwillingsrades auf die erste Übertragerspule und von dort auf die zweite Übertragerspule und damit auch auf die Auswerteanord- nung möglich ist. Aufgrund der konstruktiven Ausge¬ staltung der erfindungsgemäßen Vorrichtung sind dabei ein Einzelrad und ein Zwillingsrad gegeneinander aus¬ tauschbar und überwachbar.In order to achieve that the device according to the invention can also be used with twin tires, it is provided that the signal transmitter coils of the inner and outer wheels are aligned with the first transmitter coil attached to the hub and thus form a magnetically coupled system. In this way it is possible to transmit the signals of the signal transmitter coil of the external and internal twin wheel to the first transmitter coil and from there to the second transmitter coil and thus also to the evaluation arrangement. Because of the design of the device according to the invention, an individual wheel and a twin wheel can be exchanged and monitored for one another.
Günstigerweise ist weiterhin vorgesehen, daß die Aus¬ werteeinrichtung eine Diskriminatoranordnung zur Unterscheidung von wenigstens drei unterschiedlichen Frequenzpegeln und zur Abgabe entsprechender Ausgangs- signale aufweist. Diese drei unterschiedlichen Fre¬ quenzpegel werden in Abhängigkeit davon eingestellt, ob nur einer der z.B. als Druckschalter ausgebildeten Drucksenεoren oder beide Drucksensoren ansprechen bzw ob keiner der Druckschalter eingeschaltet ist. Die un terschiedlichen Frequenzen bei Einschaltung von einem oder zwei Druckschaltern ergeben sich daraus, daß sic beim Ansprechen der Drucksensoren die Impedanz an der ersten Übertragerspule ändert, was zu einer Änderung der Resonanzfrequenz durch Verstimmung des Schwing¬ kreises führt.It is also advantageously provided that the evaluation device has a discriminator arrangement for distinguishing at least three different frequency levels and for emitting corresponding output signals. These three different frequency levels are set as a function of whether only one of the pressure sensors designed as a pressure switch, for example, or both pressure sensors respond, or whether neither of the pressure switches is switched on. The different frequencies when one or two pressure switches are switched on result from the fact that when the pressure sensors respond, the impedance at the first transmitter coil changes, which leads to a change in the resonance frequency due to detuning of the resonant circuit.
Weitere Merkmale, Vorteile und Einzelheiten der Erfin dung ergeben sich aus der folgenden Beschreibung eine bevorzugten Ausführungsform anhand der Zeichnung. Dabei zeigenFurther features, advantages and details of the inven tion result from the following description of a preferred embodiment with reference to the drawing. Show
Fig. 1 eine schematische Schnittdarstellung eines Ein zelrades eines Kraftfahrzeugs mit einer erfin- dungsgemäßen Vorrichtung,1 is a schematic sectional view of an individual wheel of a motor vehicle with a device according to the invention,
Fig. 2 ein schematisches Schaltbild der in Fig. 1 dar gestellten Anordnung,2 is a schematic circuit diagram of the arrangement shown in FIG. 1,
Fig. 3 eine schematische Schnittdarstellung einer er¬ findungsgemäßen 'Vorrichtung an einem Zwillings rad undFig. 3 is a schematic sectional view of an inventive device on a twin wheel and
Fig. 4 eine Fig. 3 entsprechende schematische elektri sche Schaltungsanordnung.Fig. 4 is a Fig. 3 corresponding schematic electrical circuit arrangement.
In Fig. 1 ist ein Rad eines Kraftfahrzeuges, insbeson dere eines Lastkraftwagens dargestellt. Das Rad 1 um- faßt einen schlauchlosen Reifen 2, der auf eine Felge 3 aufgezogen ist. In die Felgenwand 4 ist eine dort vorgesehene Ausnehmung 5 durchsetzend ein Druck sensor 6 eingesetzt, der im einfachsten Fall ein druckabhängiger Schalter ist, welcher öffnet, sobald der Luftdruck im Reifen 2 einen Grenzwert unterschre tet. Dieser Drucksensor 6 ist elektrisch über eine Edelstahlleitung 7 mit einer Signalgeberspule 8 ver¬ bunden.In Fig. 1, a wheel of a motor vehicle, in particular a truck is shown. The wheel 1 comprises a tubeless tire 2 which is on a Rim 3 is mounted. In the rim wall 4 there is a recess 5 penetrating a pressure sensor 6 which, in the simplest case, is a pressure-dependent switch which opens as soon as the air pressure in the tire 2 falls below a limit value. This pressure sensor 6 is electrically connected to a signal transmitter coil 8 via a stainless steel line 7.
Zur Erzielung einer Montage der Felge 3 in einer def nierten Winkellage relativ zu der Nabe 12 ist an der Nabe 12 ein Zapfen 13 vorgesehen, welcher in nur ein einzige korrespondierende Bohrung 14 am Felgentopf- boden 9 eingreift.In order to achieve assembly of the rim 3 in a defined angular position relative to the hub 12, a pin 13 is provided on the hub 12, which engages in only a single corresponding bore 14 on the rim pot base 9.
Hierdurch ist sichergestellt, daß die mit zur Nabe 12 hin gerichtetem U-förmigen Kern ausgebildete Signal¬ geberspule 8 unmittelbar über eine^ an der Nabe 12 angeordneten ersten Übertragerspule 15 mit entspre¬ chend zur Felge 3 hin gerichtetem U-Kern zu liegen kommt, "welche so angeordnet ist, daß die Symmetrie¬ achse lo ihres Kernes parallel liegt zu der Längsachs 11 der Nabe 12. Die erste Übertragerspule 15 ist über eine Leitung 16 mit einer als Ringspule ausgebildeten zweiten Übertragerspule 17 verbunden. Die zweite Über tragerspule 17 weist eine Achse 18 auf, welche mit de Achse 11 der Nabe 12 zusammenfällt.This ensures that the signal transmitter coil 8 formed with a U-shaped core directed towards the hub 12 comes to lie directly over a first transmitter coil 15 arranged on the hub 12 with a U-core directed towards the rim 3, " which is arranged in such a way that the axis of symmetry 10 of its core lies parallel to the longitudinal axis 11 of the hub 12. The first transmitter coil 15 is connected via a line 16 to a second transmitter coil 17 designed as a ring coil. The second transmitter coil 17 has an axis 18, which coincides with the axis 11 of the hub 12.
An einer in herkömmlicher Weise ausgebildeten, deshal nur schematisch dargestellten Radaufhängung bzw. Achs 19, welche drehfest ist und die Nabe 12 drehbar la¬ gert, ist die Auswerteanordnung 2o befestigt, d.h. zumindest eine HF-Empfänger-Spule der Auswerteanord¬ nung 2o. Diese ist im Umfangsbereich der die zweite Übertragerspule 17 bildenden Ringspule angeordnet un mit ihr magnetisch gekoppelt. Der Empfängerspule 2o nachgeschaltet oder in diese integriert ist eine Sig- naldiskriminatoranordnung 21.The evaluation arrangement 20 is attached to a wheel suspension or axle 19, which is designed in a conventional manner and is therefore only shown schematically, and which is non-rotatable and rotatably supports the hub 12, ie at least one RF receiver coil of the evaluation arrangement 20. This is arranged in the circumferential area of the ring coil forming the second transmitter coil 17 and is magnetically coupled to it. A signal discriminator arrangement 21 is connected downstream of the receiver coil 2o or integrated therein.
Aus Fig. 2 wird deutlich, daß in Abhängigkeit von de Öffnen oder Schließen des als Druckschalter ausgebil¬ deten Drucksensors 6 der Hochfrequenzschwingkreis ve stimmt wird, so daß je nach dem anliegenden Frequenz¬ pegel von der Diskriminatoranordnung 21 ein Ausgangs signal "Reifendruck normal" bzw. "Reifendruck abgefal len" abgegeben werden kann.From Fig. 2 it is clear that depending on the opening or closing of the pressure sensor 6, designed as a pressure switch, the high-frequency oscillating circuit ve is correct, so that, depending on the frequency level present, an output signal "tire pressure normal" or "Tire pressure dropped" can be delivered.
In Fig. 3 sind zwei Fig. 1 entsprechende Räder 1 zu einem sogenannten Zwillingsreifen zusammengefaßt. Die Fig. 1 entsprechenden Bauteile sind in Fig. 3 mit de gleichen Bezugszeichen gekennzeichnet, wobei die mit bezeichneten Teile jeweils zu dem außen laufenden un die mit b gekennzeichneten Teile jeweils zu dem inne laufenden Zwillingsreifen gehören.In Fig. 3 two Fig. 1 corresponding wheels 1 are combined into a so-called twin tire. The components corresponding to FIG. 1 are identified in FIG. 3 by the same reference numerals, the parts designated with in each case belonging to the outer running un and the parts marked with b each belonging to the inner running twin tires.
Aus der Darstellung in Fig. 3 ist erkennbar, daß dan wenn die Felgentopfböden 9a bzw. 9b der Reifen la bzw. 1b aneinander anliegen, die ersten Übertrager¬ spulen 15a,15b unmittelbar nebeneinander liegen und mit einer dementsprechend doppelt so breiten an der Nabe 11 angeordneten Übertragerspule 17 magnetisch gekoppelt sind, so daß dann auch Signale des Druck¬ sensors 6a aus dem Rad la über die Signalgeberspule 8 durch die erste Übertragerspule 15 auf die zugehörige zweite Übertragerspule 17 und die Auswerteanordnung übertragen werden.It can be seen from the illustration in FIG. 3 that when the rim well bottoms 9a and 9b of the tires la and 1b abut one another, the first transformer coils 15a, 15b lie directly next to one another and, accordingly, twice as wide on the hub 11 Arranged transmitter coil 17 are magnetically coupled, so that then signals of the Druck¬ sensor 6a from the wheel la via the signal transmitter coil 8 through the first transmitter coil 15 to the associated second transmitter coil 17 and the evaluation arrangement are transmitted.
Wie aus Fig. 4 ersichtlich ist, ergeben sich radseit unterschiedliche Impedanzen je nachdem, ob der Druck schalter des Sensors 6a geschlossen, der Druckschalt des Sensors 6b geschlossen oder beide geöffnet bzw. geschlossen sind. Hieraus ergeben sich verschiedene Frequenzpegel bzw. Resonanzfrequenzen, so daß je nac der Verstimmung des Schwingkreises der Auswerteanord nung 2o der Frequenzdiskriminator 21 unterschiedlich Ausgangssignale ausgeben kann, welche die Alarmanzei ermöglichen, wenn der Reifendruck in einem oder beid Reifen den Sollwert unterschreitet.As can be seen from FIG. 4, there are different impedances on the wheel side depending on whether the pressure switch of the sensor 6a is closed, the pressure switch of the sensor 6b is closed or both are open or closed. This results in different frequency levels or resonance frequencies, so that depending on the detuning of the resonant circuit of the evaluation device 2o, the frequency discriminator 21 can output different output signals which enable the alarm to be displayed when the tire pressure in one or both tires falls below the setpoint.
Aus der vorstehenden Beschreibung, insbesondere aus Fig. 3, wird auch deutlich, daß die erfindungsgemäße Vorrichtung gegen jede Manipulation von außen ge¬ schützt ist, weil sämtliche Vorrichtungsteile im Inneren der Felgentöpfe liegen. From the above description, in particular from FIG. 3, it is also clear that the device according to the invention is protected against any manipulation from the outside because all device parts are located inside the rim pots.

Claims

A n s p r ü c h e Expectations
1. Vorrichtung zur Übertragung und Auswertung von Me߬ signalen für den Reifendruck von auf Felgen aufgezo¬ genen schlauchlosen Reifen bei Einzel- und Zwillings¬ rädern von Kraftfahrzeugen umfassend einen in der Felgenwand angeordneten Drucksensor, der elektrisch mit einer an der Felge angeordneten Signalgeberspule verbunden ist sowie eine im Bereich der Achse ortsfest mit dem Kraftfahrzeug verbundene HF-Schwingkreis-Sig¬ nalauswerteanordnung mit einer Signalaufnähmespule, dadurch gekennzeichnet, daß im Bereich der Signalge¬ ber-Spule (8) an der die Felge (3) tragenden, mit dieser drehfest verbundenen Nabe (12) eine erste Über¬ tragerspule (15) angeordnet ist, welche elektrisch mit einer zweiten Übertragerspule (17) verbunden ist, wo¬ bei letztere als Ringspule ausgebildet ist, deren Spulenachse (18) in der Nabenachse (11) liegt, und wobei die Signalaufnahmespule der feststehenden HF-Schwingkreis-Ξignalauswerteanordnung im Magnetfeld¬ bereich der zweiten Übertragerspule (17) angeordnet ist.1. Device for transmitting and evaluating measurement signals for the tire pressure of tubeless tires mounted on rims in single and twin wheels of motor vehicles, comprising a pressure sensor arranged in the rim wall, which is electrically connected to a signal transmitter coil arranged on the rim and an RF oscillating circuit signal evaluation arrangement which is fixedly connected to the motor vehicle in the region of the axis and has a signal pick-up coil, characterized in that in the area of the signaling coil (8) on the rim (3) carrying the rim (3), connected to it in a rotationally fixed manner Hub (12) a first transformer coil (15) is arranged, which is electrically connected to a second transformer coil (17), the latter being designed as a ring coil, the Coil axis (18) lies in the hub axis (11), and the signal pick-up coil of the fixed RF oscillating circuit signal evaluation arrangement is arranged in the magnetic field region of the second transmitter coil (17).
2. Vorrichtung nach Anspruch 1, dadurch gekennzeich¬ net, daß die Signalgeberspule (8) und die erste Über¬ tragerspule (15) im Bereich des Felgentopfbodens (9) angeordnet sind.2. Device according to claim 1, characterized in that the signal transmitter coil (8) and the first transmitter coil (15) are arranged in the region of the rim pot base (9).
3. Vorrichtung nach Anspruch 1, dadurch gekennzeich¬ net, daß an der Felge (3) bzw. an der Nabe (12) mecha¬ nische Rasteinrichtungen (13,14) derart angeordnet sind, daß die Felge (3) relativ zu der Nabe (12) je¬ weils nur in einer solchen definierten Winkellage montierbar ist, in der sich Signalgeberspule (8) und erste Übertragerspule (1,5) gegenüber stehen.3. Device according to claim 1, characterized gekennzeich¬ net that on the rim (3) or on the hub (12) mechanical locking devices (13,14) are arranged such that the rim (3) relative to the hub (12) can only be installed in such a defined angular position in which the signal transmitter coil (8) and the first transmitter coil (1,5) are opposite each other.
4. Vorrichtung nach Anspruch 1, dadurch gekennzeich¬ net, daß die Signalgeberspule (8) und die erste Über¬ tragerspule (15) derart angeordnet sind, daß ihre Achsen (lo) radial zur Nabenachse (11) verlaufen und ihre einana cier gegenüberliegenden Stirnflächen mit¬ einander fluchten.4. The device according to claim 1, characterized gekennzeich¬ net that the signal transmitter coil (8) and the first transmitter coil (15) are arranged such that their axes (lo) are radial to the hub axis (11) and their einana cier opposite end faces aligned with each other.
5. Vorrichtung nach Anspruch 4, dadurch gekennzeich¬ net, daß bei Zwillingsreifen beide Signalgeberspulen (8) aufje einer Felge (3) derart nebeneinander ange¬ ordnet sind, daß sie mit einer gemeinsamen, ihnen gegenüberliegenden, auf der Nabe (12) angeordneten ersten Übertragerspule (17) magnetisch gekoppelt sind. 5. The device according to claim 4, characterized gekennzeich¬ net that in twin tires, both signal transmitter coils (8) on one rim (3) are arranged side by side such that they have a common, opposite, arranged on the hub (12) first Transmitter coil (17) are magnetically coupled.
6. Vorrichtung nach Anspruch 4, dadurch gekennzeich¬ net, daß die Auswerteeinrichtung (2o) eine Diskrimi- natoranordnung (21) zur Unterscheidung von wenigstens drei unterschiedlichen Frequenzpegeln und zur Abgabe entsprechender Ausgangssignale aufweist. 6. The device according to claim 4, characterized gekennzeich¬ net that the evaluation device (2o) has a discriminator arrangement (21) for distinguishing at least three different frequency levels and for outputting corresponding output signals.
EP19890901843 1988-05-04 1989-02-04 Device for transmitting and evaluating measurement signals for tyre pressure in motor vehicles Ceased EP0391977A1 (en)

Applications Claiming Priority (2)

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DE3815114 1988-05-04
DE3815114A DE3815114A1 (en) 1988-05-04 1988-05-04 DEVICE FOR TRANSMITTING AND EVALUATING MEASURING SIGNALS FOR THE TIRE PRESSURE OF MOTOR VEHICLES

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Families Citing this family (94)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2661642B1 (en) * 1990-05-04 1994-10-28 Jaeger PRESSURE SENSOR FOR TIRES.
DE4100472C1 (en) * 1991-01-09 1992-07-23 Texas Instruments Deutschland Gmbh, 8050 Freising, De
FR2706811A1 (en) * 1993-06-25 1994-12-30 Michelin & Cie
US5473938A (en) * 1993-08-03 1995-12-12 Mclaughlin Electronics Method and system for monitoring a parameter of a vehicle tire
FR2710144A1 (en) * 1993-09-13 1995-03-24 Bouzaglo Henri Sensor for deformation of the tyre of the wheel of a motor vehicle
US5585554A (en) * 1994-10-31 1996-12-17 Handfield; Michael System and method for monitoring a pneumatic tire
DE69618397T2 (en) * 1995-08-08 2002-08-22 Michelin & Cie Device for monitoring the tires of a vehicle
US5844130A (en) * 1996-04-03 1998-12-01 Ssi Technologies Apparatus for maintaining a constant radial distance between a transmitting circuit and an antenna coil
ES2164509B1 (en) * 1998-10-21 2003-06-01 Benimeli Fermin Jaime Loureiro DEVICE FOR PRESSURE CONTROL IN CAR TIRES AND ANALOG VEHICLES.
ATE276113T1 (en) * 1998-12-09 2004-10-15 Beru Ag METHOD FOR ASSOCIATING IDENTIFIERS IN SIGNALS FROM TRANSMITTERS IN A TIRE PRESSURE MONITORING SYSTEM TO THE WHEELS ON WHICH THE TRANSMITTERS ARE LOCATED
AU2452300A (en) 1999-02-11 2000-08-29 Emtop Limited Signal transmission in a tire pressure sensing system
FR2809674B1 (en) * 2000-06-05 2003-03-28 Labinal WHEEL ASSEMBLY WITH PRESSURE SENSOR
DE10029282A1 (en) 2000-06-14 2001-12-20 Bosch Gmbh Robert Loading state determining method for vehicle, involves detecting temporal change of measured tire pressure
US8266465B2 (en) 2000-07-26 2012-09-11 Bridgestone Americas Tire Operation, LLC System for conserving battery life in a battery operated device
US7161476B2 (en) 2000-07-26 2007-01-09 Bridgestone Firestone North American Tire, Llc Electronic tire management system
FR2825322B1 (en) * 2001-05-31 2003-09-05 Labinal WHEEL ASSEMBLY HAVING A PRESSURE SENSOR
FR2832272B1 (en) * 2001-11-09 2004-09-24 Commissariat Energie Atomique PASSIVE DEVICE FOR INCREASING TRANSMISSION EFFICIENCY OF RADIO FREQUENCY SYSTEMS
DE10311795B4 (en) * 2003-03-18 2012-09-27 Robert Bosch Gmbh Micromechanical pressure switch and method for manufacturing the micromechanical pressure switch
US7205885B2 (en) * 2003-08-25 2007-04-17 Siemens Vdo Automotive Corporation Tire sensor communication system
US6938468B1 (en) * 2004-02-27 2005-09-06 Trw Automotive U.S. Llc Tire parameter sensing system having a magnetically conductive rim and an associated method
US7825543B2 (en) 2005-07-12 2010-11-02 Massachusetts Institute Of Technology Wireless energy transfer
US7741734B2 (en) 2005-07-12 2010-06-22 Massachusetts Institute Of Technology Wireless non-radiative energy transfer
GB2446213B (en) * 2007-01-31 2012-02-22 Bf1Systems Ltd A wheel sensor
US8805530B2 (en) 2007-06-01 2014-08-12 Witricity Corporation Power generation for implantable devices
US9421388B2 (en) 2007-06-01 2016-08-23 Witricity Corporation Power generation for implantable devices
BRPI0909794B8 (en) 2008-03-21 2022-08-02 Eldec Corp AIRCRAFT TIRE PRESSURE LOOP LINK
US9601266B2 (en) 2008-09-27 2017-03-21 Witricity Corporation Multiple connected resonators with a single electronic circuit
US9318922B2 (en) 2008-09-27 2016-04-19 Witricity Corporation Mechanically removable wireless power vehicle seat assembly
US8598743B2 (en) 2008-09-27 2013-12-03 Witricity Corporation Resonator arrays for wireless energy transfer
US9106203B2 (en) 2008-09-27 2015-08-11 Witricity Corporation Secure wireless energy transfer in medical applications
US8643326B2 (en) 2008-09-27 2014-02-04 Witricity Corporation Tunable wireless energy transfer systems
US8907531B2 (en) 2008-09-27 2014-12-09 Witricity Corporation Wireless energy transfer with variable size resonators for medical applications
US8482158B2 (en) 2008-09-27 2013-07-09 Witricity Corporation Wireless energy transfer using variable size resonators and system monitoring
US8901778B2 (en) 2008-09-27 2014-12-02 Witricity Corporation Wireless energy transfer with variable size resonators for implanted medical devices
US8497601B2 (en) 2008-09-27 2013-07-30 Witricity Corporation Wireless energy transfer converters
US9105959B2 (en) 2008-09-27 2015-08-11 Witricity Corporation Resonator enclosure
US9246336B2 (en) 2008-09-27 2016-01-26 Witricity Corporation Resonator optimizations for wireless energy transfer
US8947186B2 (en) 2008-09-27 2015-02-03 Witricity Corporation Wireless energy transfer resonator thermal management
US8901779B2 (en) 2008-09-27 2014-12-02 Witricity Corporation Wireless energy transfer with resonator arrays for medical applications
US9184595B2 (en) 2008-09-27 2015-11-10 Witricity Corporation Wireless energy transfer in lossy environments
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US8946938B2 (en) 2008-09-27 2015-02-03 Witricity Corporation Safety systems for wireless energy transfer in vehicle applications
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US9744858B2 (en) 2008-09-27 2017-08-29 Witricity Corporation System for wireless energy distribution in a vehicle
US8963488B2 (en) 2008-09-27 2015-02-24 Witricity Corporation Position insensitive wireless charging
US8957549B2 (en) 2008-09-27 2015-02-17 Witricity Corporation Tunable wireless energy transfer for in-vehicle applications
US8912687B2 (en) 2008-09-27 2014-12-16 Witricity Corporation Secure wireless energy transfer for vehicle applications
US9577436B2 (en) 2008-09-27 2017-02-21 Witricity Corporation Wireless energy transfer for implantable devices
US8928276B2 (en) 2008-09-27 2015-01-06 Witricity Corporation Integrated repeaters for cell phone applications
US9601261B2 (en) 2008-09-27 2017-03-21 Witricity Corporation Wireless energy transfer using repeater resonators
US9093853B2 (en) 2008-09-27 2015-07-28 Witricity Corporation Flexible resonator attachment
US8922066B2 (en) 2008-09-27 2014-12-30 Witricity Corporation Wireless energy transfer with multi resonator arrays for vehicle applications
US8933594B2 (en) 2008-09-27 2015-01-13 Witricity Corporation Wireless energy transfer for vehicles
US9544683B2 (en) 2008-09-27 2017-01-10 Witricity Corporation Wirelessly powered audio devices
US8937408B2 (en) 2008-09-27 2015-01-20 Witricity Corporation Wireless energy transfer for medical applications
US9396867B2 (en) 2008-09-27 2016-07-19 Witricity Corporation Integrated resonator-shield structures
US9035499B2 (en) 2008-09-27 2015-05-19 Witricity Corporation Wireless energy transfer for photovoltaic panels
US9065423B2 (en) 2008-09-27 2015-06-23 Witricity Corporation Wireless energy distribution system
WO2010039967A1 (en) 2008-10-01 2010-04-08 Massachusetts Institute Of Technology Efficient near-field wireless energy transfer using adiabatic system variations
US7948385B2 (en) * 2008-12-09 2011-05-24 General Electric Company Systems and methods for using ferrite alignment keys in wireless remote sensors
US9602168B2 (en) 2010-08-31 2017-03-21 Witricity Corporation Communication in wireless energy transfer systems
US9948145B2 (en) 2011-07-08 2018-04-17 Witricity Corporation Wireless power transfer for a seat-vest-helmet system
CA2844062C (en) 2011-08-04 2017-03-28 Witricity Corporation Tunable wireless power architectures
CN103875159B (en) 2011-09-09 2017-03-08 WiTricity公司 Exterior object detection in wireless energy transmission system
US20130062966A1 (en) 2011-09-12 2013-03-14 Witricity Corporation Reconfigurable control architectures and algorithms for electric vehicle wireless energy transfer systems
US9318257B2 (en) 2011-10-18 2016-04-19 Witricity Corporation Wireless energy transfer for packaging
AU2012332131A1 (en) 2011-11-04 2014-05-22 Witricity Corporation Wireless energy transfer modeling tool
JP2015508987A (en) 2012-01-26 2015-03-23 ワイトリシティ コーポレーションＷｉｔｒｉｃｉｔｙ Ｃｏｒｐｏｒａｔｉｏｎ Wireless energy transmission with reduced field
US9343922B2 (en) 2012-06-27 2016-05-17 Witricity Corporation Wireless energy transfer for rechargeable batteries
US9287607B2 (en) 2012-07-31 2016-03-15 Witricity Corporation Resonator fine tuning
US9595378B2 (en) 2012-09-19 2017-03-14 Witricity Corporation Resonator enclosure
CN109969007A (en) 2012-10-19 2019-07-05 韦特里西提公司 External analyte detection in wireless energy transfer system
US9842684B2 (en) 2012-11-16 2017-12-12 Witricity Corporation Systems and methods for wireless power system with improved performance and/or ease of use
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US9780573B2 (en) 2014-02-03 2017-10-03 Witricity Corporation Wirelessly charged battery system
WO2015123614A2 (en) 2014-02-14 2015-08-20 Witricity Corporation Object detection for wireless energy transfer systems
US9892849B2 (en) 2014-04-17 2018-02-13 Witricity Corporation Wireless power transfer systems with shield openings
US9842687B2 (en) 2014-04-17 2017-12-12 Witricity Corporation Wireless power transfer systems with shaped magnetic components
US9837860B2 (en) 2014-05-05 2017-12-05 Witricity Corporation Wireless power transmission systems for elevators
EP3140680B1 (en) 2014-05-07 2021-04-21 WiTricity Corporation Foreign object detection in wireless energy transfer systems
US9954375B2 (en) 2014-06-20 2018-04-24 Witricity Corporation Wireless power transfer systems for surfaces
US10574091B2 (en) 2014-07-08 2020-02-25 Witricity Corporation Enclosures for high power wireless power transfer systems
US9842688B2 (en) 2014-07-08 2017-12-12 Witricity Corporation Resonator balancing in wireless power transfer systems
US9843217B2 (en) 2015-01-05 2017-12-12 Witricity Corporation Wireless energy transfer for wearables
US10248899B2 (en) 2015-10-06 2019-04-02 Witricity Corporation RFID tag and transponder detection in wireless energy transfer systems
CN108700620B (en) 2015-10-14 2021-03-05 无线电力公司 Phase and amplitude detection in wireless energy transfer systems
US10063110B2 (en) 2015-10-19 2018-08-28 Witricity Corporation Foreign object detection in wireless energy transfer systems
EP3365958B1 (en) 2015-10-22 2020-05-27 WiTricity Corporation Dynamic tuning in wireless energy transfer systems
US10075019B2 (en) 2015-11-20 2018-09-11 Witricity Corporation Voltage source isolation in wireless power transfer systems
KR20180101618A (en) 2016-02-02 2018-09-12 위트리시티 코포레이션 Control of wireless power transmission system
CN109075614B (en) 2016-02-08 2021-11-02 韦特里西提公司 Variable capacitance device, impedance matching system, transmission system, and impedance matching network
CN111108662B (en) 2017-06-29 2023-12-12 韦特里西提公司 Protection and control of wireless power systems
US10942078B2 (en) 2019-05-31 2021-03-09 TYCKit GmbH Measurement of pressure in pressure-filled containers with flexible walls, in particular tires

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1383265A (en) * 1971-12-17 1974-02-12 Whiteing R G Transmission of information
FR2212245B1 (en) * 1972-12-30 1976-11-19 Toyo Tire & Rubber Co
JPS49133672U (en) * 1973-03-19 1974-11-16
GB1539019A (en) * 1975-01-14 1979-01-24 Lucas Electrical Ltd Tyre pressure warning systems
US4334428A (en) * 1978-05-04 1982-06-15 Fima Raoul G Apparatus for indicating parameters sensed on a rotatable wheel
IT1146610B (en) * 1981-04-28 1986-11-12 Gianluigi Aguglia TIRE PRESSURE METER WITH MACHINE IN MOTION
US4389884A (en) * 1981-06-15 1983-06-28 Gianluigi Agulia Remote tire pressure indicator
DE3541529A1 (en) * 1985-11-23 1987-05-27 Bosch Gmbh Robert DEVICE FOR TRANSMITTING MEASURING SIGNALS, E.g. FOR TIRE PRESSURE, ON TWIN WHEELS OF MOTOR VEHICLES

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8910851A1 *

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