DE3741818C1 - Device for checking vehicle tires - Google Patents

Device for checking vehicle tires

Info

Publication number
DE3741818C1
DE3741818C1 DE19873741818 DE3741818A DE3741818C1 DE 3741818 C1 DE3741818 C1 DE 3741818C1 DE 19873741818 DE19873741818 DE 19873741818 DE 3741818 A DE3741818 A DE 3741818A DE 3741818 C1 DE3741818 C1 DE 3741818C1
Authority
DE
Germany
Prior art keywords
wheel
measured values
sensors
temperature sensors
actuators
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
DE19873741818
Other languages
German (de)
Inventor
Gerhard Dipl-Ing Kaelberer
Hans Spies
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.)
SPIES, HANS, 8068 PFAFFENHOFEN, DE KAELBERER, GERH
Original Assignee
Messerschmitt Bolkow Blohm 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
Application filed by Messerschmitt Bolkow Blohm AG filed Critical Messerschmitt Bolkow Blohm AG
Priority to DE19873741818 priority Critical patent/DE3741818C1/en
Priority to PCT/EP1988/001046 priority patent/WO1989005238A1/en
Application granted granted Critical
Publication of DE3741818C1 publication Critical patent/DE3741818C1/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M17/00—Testing of vehicles
    • G01M17/007—Wheeled or endless-tracked vehicles
    • G01M17/02—Tyres
    • G01M17/025—Tyres using infrasonic, sonic or ultrasonic vibrations
    • 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
    • B60C23/06—Signalling devices actuated by deformation of the tyre, e.g. tyre mounted deformation sensors or indirect determination of tyre deformation based on wheel speed, wheel-centre to ground distance or inclination of wheel axle
    • B60C23/061—Signalling devices actuated by deformation of the tyre, e.g. tyre mounted deformation sensors or indirect determination of tyre deformation based on wheel speed, wheel-centre to ground distance or inclination of wheel axle by monitoring wheel speed
    • 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
    • B60C23/06—Signalling devices actuated by deformation of the tyre, e.g. tyre mounted deformation sensors or indirect determination of tyre deformation based on wheel speed, wheel-centre to ground distance or inclination of wheel axle
    • B60C23/061—Signalling devices actuated by deformation of the tyre, e.g. tyre mounted deformation sensors or indirect determination of tyre deformation based on wheel speed, wheel-centre to ground distance or inclination of wheel axle by monitoring wheel speed
    • B60C23/062—Frequency spectrum analysis of wheel speed signals, e.g. using Fourier transformation
    • 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
    • B60C23/20—Devices for measuring or signalling tyre temperature only
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M17/00—Testing of vehicles
    • G01M17/007—Wheeled or endless-tracked vehicles
    • G01M17/02—Tyres

Abstract

A device for monitoring vehicle tires, in particular pneumatic tyres, when the vehicle is moving comprises at least one measuring sensor for each wheel to be monitored. Sonic sensors (103, 104) and/or temperature sensors (111) record together changes in the corresponding measured values in the tyre/wheel by temporal comparison or by comparison of these measured values and supply them to a measurement signal processing and evaluation processor (108) which sends a warning to a display unit (109) or sends controlled pulses to actuators if the permissible limits of deviation are exceeded.

Description

Die Erfindung betrifft eine Vorrichtung zur Kontrolle von Fahrzeugreifen gemäß dem Oberbegriff des Patentanspruchs 1.The invention relates to a device for checking vehicle tires according to the preamble of claim 1.

Eine solche ist aus der DE 34 12 949 A1 bekannt. Dort wird um die Sicherheit und Einsatzbereitschaft von Fahrzeugbereifung zu überprüfen und zu gewährleisten der Reifendruck gemessen. Dazu werden Druckmeßelemente verwendet, die in einer Kammer einen Vergleichsdruck einschließen. Die Kammer ist dabei von einer Membran abgeschlossen, die dem Reifendruck ausgesetzt ist. Bei Verringerung des Reifendruckes verschiebt sich die Membran. Ein in dem Druckmeßelement integrierter Schwingkreis wird dadurch unterbrochen. Bis heute hat sich dieses Verfahren nicht besonders durchgesetzt, weil der Luftdruck nur ein Kriterium bei der Beurteilung der Betriebssicherheit darstellt.Such is known from DE 34 12 949 A1. There will be around to check the safety and operational readiness of vehicle tires and ensure the tire pressure measured. For this purpose, pressure measuring elements are used which have a reference pressure in a chamber lock in. The chamber is closed by a membrane that is exposed to tire pressure. Shifts when tire pressure is reduced the membrane. An integrated in the pressure measuring element The resonant circuit is interrupted. To date has this procedure is not particularly popular because of air pressure is only one criterion when assessing operational safety.

Es ist aus der JP 61/21 11 08 A eine Vorrichtung mit Mitteln zur Drehzahlerfassung am Rad durch Sensoren bekannt, die ihre Meßwerte einer Auswertung durch einen Mikroprozessor zuführen.From JP 61/21 11 08 A it is a device with means for speed detection on the wheel by sensors known that their measured values one Perform evaluation by a microprocessor.

Aufgabe der Erfindung ist es, eine Vorrichtung zur Kontrolle von Fahrzeugreifen der eingangs genannten Art so weiterzuentwickeln, daß sie nicht nur auf Luftdruckunterschiede anspricht, sondern auch auf andere Belastungen der Reifen, unter anderem schlechte Auswuchtung der Räder und Überlastung.The object of the invention is a device for checking vehicle tires to further develop the type mentioned at the outset in such a way that it not only responds to differences in air pressure, but also also on other loads on the tires, including poor balancing of the Wheels and overload.

Gelöst wird diese Aufgabe durch die im Kennzeichen des Patentanspruchs 1 angegebenen Merkmale.This problem is solved by the in the characterizing part of patent claim 1 specified characteristics.

Aus- und Weiterbildungen der Erfindung sind in den Unteransprüchen gekennzeichnet.Training and further developments of the invention are characterized in the subclaims.

Im Gegensatz zu einer reinen Kontrolle des Luftdruckes ist mit der erfindungsgemäßen Überwachungsvorrichtung durch prozessorgesteuerte Auswertung verschiedener Reifen-Informationen während der Fahrt sichere Fehler-Erkennung und Warnsignalgebung möglich bei:In contrast to a pure control of the air pressure with the invention Monitoring device through processor-controlled evaluation various tire information while driving Error detection and warning signaling possible with:

- Überladung
- ungleicher Lastverteilung
- schlechter Auswuchtung
- ungünstiger Belastung in Parkstellung
- Stoßdämpferschäden
- Federbruch bzw. -ermüdung
- Rahmenverwindungen
- Reifenpannen, -platzen, -ablösen
- Achsbruch
- Radlagerschaden
- Bremsschaden
- ungleicher Reifenabnützung.- Overload
- uneven load distribution
- poor balancing
- unfavorable load in park position
- Damage to the shock absorber
- spring breakage or fatigue
- frame twists
- Tire punctures, bursts, or detachments
- broken axle
- Wheel bearing damage
- brake damage
- uneven tire wear.

Selbstverständlich sind diese Belastungen mit den erfindungsgemäßen Mitteln zusätzlich zu Luftdruckunterschieden erfaßbar, ohne hierauf beschränkt zu sein. Auch andere statische oder dynamische Effekte können (während der Fahrt) erkannt und ihre Auswirkungen vermindert oder ganz verhindert werden.Of course, these loads are with the means according to the invention detectable in addition to air pressure differences, without being limited to this to be. Other static or dynamic effects can also (while driving) recognized and their effects reduced or completely be prevented.

Ausführungsbeispiele der Erfindung sind in den beigefügten Zeichnungen rein schematisch dargestellt. Es zeigtEmbodiments of the invention are in the accompanying drawings shown purely schematically. It shows

Fig. 1 ein Blockschaltbild einer Ausführungsform des im Fahrzeug integrierten Systems; Fig. 1 is a block diagram of an embodiment of the integrated system in the vehicle;

Fig. 2 eine Einzelheit an einem Rad; Figure 2 shows a detail on a wheel.

Fig. 3 eine Signalverarbeitungs- und Übertragungsart. Fig. 3 shows a signal processing and transmission type.

Entsprechend Fig. 1 sind z. B. am Rahmen des Fahrzeuges Mikrophone 1 bis n, 101 und 102 in der Nähe jedes Rades angebracht und/oder Körperschallsensoren 1 bis n, 103 und 104 mit den jeweiligen Vorverstärkern 101 a bis 104 a. Darüber hinaus kann über Sensoren 111 eine Temperaturmessung auf Abstand an den Reifen erfolgen. According to Fig. 1, z. B. attached to the frame of the vehicle microphones 1 to n , 101 and 102 near each wheel and / or structure-borne noise sensors 1 to n , 103 and 104 with the respective preamplifiers 101 a to 104 a . In addition, sensors 111 can be used to measure the temperature at a distance from the tires.

Aus dem Getriebe oder dem Antiblockiersystem (ABS) können noch die jeweiligen Drehzahlen 1 bis n in 105 ermittelt werden.The respective speeds 1 to n in 105 can also be determined from the transmission or the anti-lock braking system (ABS).

Alle diese Informationen gehen entweder einer elektrischen oder optischen Schnittstelle 106 und einem Spektrumanalysator 107 zu. Dieser führt die ohne oder mit Drehzahlinformation gewonnenen Schallspektren und/oder induzierten Körperschallspektren jedes Rades dem Auswerteprozessor 108 zu. In diesem Auswerteprozessor 108 werden die Spektren der Räder untereinander und/oder mit der gespeicherten Vorgeschichte verglichen. Dasjenige Rad mit einem defekten, fehlerhaften oder z. B. durch Deformation oder Abnützung, Ermüdung oder anders belasteten oder beschädigtem Reifen wird identifiziert, und das Ergebnis kommt beim Fahrer als Warnung zur Anzeigeeinheit 109. Ansonsten können über die so gewonnenen Informationen auch Stellglieder 110 betätigt werden, die z. B. bei einem Reifendefekt die Einspritzung einer Reifenlösung in das Reifeninnere bewirken.All this information goes to either an electrical or optical interface 106 and a spectrum analyzer 107 . This feeds the sound spectra obtained with or without speed information and / or induced structure-borne sound spectra of each wheel to the evaluation processor 108 . In this evaluation processor 108 , the spectra of the wheels are compared with one another and / or with the stored history. The wheel with a broken, faulty or z. B. by deformation or wear, fatigue or otherwise loaded or damaged tire is identified, and the result comes to the driver as a warning to the display unit 109 . Otherwise, actuators 110 can also be actuated via the information obtained in this way. B. in the event of a tire defect, the injection of a tire solution into the tire interior.

Neben dieser Messung von Größen durch Sensoren am Fahrzeugaufbau kann entsprechend Fig. 2 auch ein Testgerät 204 in die Nabe 20 des mit einer Felge 202 bzw. einer weiteren Felge 203 versehenen Fahrzeuges eingebaut werden.In addition to this measurement of variables by sensors on the vehicle body, a test device 204 can also be installed in the hub 20 of the vehicle provided with a rim 202 or a further rim 203 , as shown in FIG. 2.

Dieses Testgerät 204 stellt über eine exzentrische Masse die Energieversorgung während der Fahrt durch einen Generator 30 sicher, der zugleich eine Information über die echte Drehzahl an einen Mikroprozessor 304 abgibt. Es können damit direkt am Reifen oder der Felge z. B. Sensoren für Körperschall 302 und Temperatur 303 angebracht werden. Die Nutz-Information wird über den Mikroprozessor 304 vorselektiert und über eine IR-Diode 305 einer oder mehreren Empfangsdioden 306 übermittelt und von dort an die Anzeigeeinheit 109 oder die Stellglieder 110 geleitet.This test device 204 uses an eccentric mass to ensure the energy supply while driving through a generator 30 , which at the same time provides information about the real speed to a microprocessor 304 . It can directly on the tire or the rim z. B. sensors for structure-borne noise 302 and temperature 303 are attached. The useful information is preselected via the microprocessor 304 and transmitted via an IR diode 305 to one or more receiving diodes 306 and from there to the display unit 109 or the actuators 110 .

Diese Information kann im Gesamtsystem 307 entsprechend Fig. 1 ausgewertet werden.This information can be evaluated in the overall system 307 according to FIG. 1.

Claims (5)

1. Vorrichtung zur Kontrolle von Fahrzeugreifen, insbesondere Luftreifen, während der Fahrt mit wenigstens einem Meßfühler je zu überwachendem Rad, dadurch gekennzeichnet, daß
  • - Schallsensoren oder Temperatursensoren (111), die Veränderungen diesbezüglicher Meßwerte am Reifen/Rad - wie an sich bekannt - durch zeitlichen Vergleich oder Vergleich dieser Meßwerte untereinander erfassen und einem Auswerteprozessor (108) zuführen, der bei Überschreiten bestimmter Grenzen zulässiger Abweichungen dieser Meßwerte eine Anzeigeeinheit (109) auslöst oder Steuerimpulse an Stellglieder (110) abgibt;
  • - in der Radnabe (201) oder am Rahmen des Fahrzeuges in der unmittelbaren Nähe jeden Rades Mikrophone (101 und 102) und/oder Körperschallsensoren (103 und 104) als Schallsensoren und/oder die Temperatursensoren (111) angeordnet sind;
  • - die Schallsensoren und/oder Temperatursensoren (111) mit einer elektrischen oder optischen Schnittstelle (106) und diese mit einem Spektrumanalysator (107) und letzterer mit dem Auswerteprozessor (108) über Datenleitungen (Bus) verbunden sind.
1. Device for checking vehicle tires, in particular pneumatic tires, while driving with at least one sensor per wheel to be monitored, characterized in that
  • - Sound sensors or temperature sensors ( 111 ), which detect changes in the relevant measured values on the tire / wheel - as is known per se - by comparing them in time or comparing these measured values with one another and feeding them to an evaluation processor ( 108 ) which, when certain limits of permissible deviations of these measured values are exceeded, a display unit ( 109 ) triggers or delivers control pulses to actuators ( 110 );
  • - In the wheel hub ( 201 ) or on the frame of the vehicle in the immediate vicinity of each wheel microphones ( 101 and 102 ) and / or structure-borne noise sensors ( 103 and 104 ) are arranged as sound sensors and / or the temperature sensors ( 111 );
  • - The sound sensors and / or temperature sensors ( 111 ) with an electrical or optical interface ( 106 ) and these are connected to a spectrum analyzer ( 107 ) and the latter to the evaluation processor ( 108 ) via data lines (bus) .
2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß zusätzlich Raddrehzahlen, als Meßwerte erfaßt, zu Signalen verarbeitet (in 105) und ausgewertet werden (in 108).2. Device according to claim 1, characterized in that in addition wheel speeds, detected as measured values, processed into signals (in 105 ) and evaluated (in 108 ). 3. Vorrichtung nach einer der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß ein Rad ein Testgerät (204) in die Nabe (201) eingebaut enthält. 3. Device according to one of the preceding claims, characterized in that a wheel contains a test device ( 204 ) built into the hub ( 201 ). 4. Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, daß das Testgerät (204) eine exzentrische Masse aufweist, die bewirkt, daß bei sich drehendem Rad in einem Generator (301) oder in einem Drehzahlgeber eine Spannung induziert wird.4. The device according to claim 3, characterized in that the test device ( 204 ) has an eccentric mass, which causes a voltage is induced in a generator ( 301 ) or in a speed sensor when the wheel is rotating. 5. Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, daß der Generator (301) oder der Drehzahlgeber die in ihm induzierte Spannung an einen Mikroprozessor (304) abgibt, und ein daraus gebildetes Nutzsignal am Ausgang des Prozessors (304) über einen IR-Sender (305) und einem oder mehreren Empfängern (306) an die Anzeigeeinheit (109) oder die Stellglieder (110) übermittelt werden.5. The device according to claim 4, characterized in that the generator ( 301 ) or the speed sensor outputs the voltage induced in it to a microprocessor ( 304 ), and a useful signal formed therefrom at the output of the processor ( 304 ) via an IR transmitter ( 305 ) and one or more receivers ( 306 ) are transmitted to the display unit ( 109 ) or the actuators ( 110 ).
DE19873741818 1987-12-10 1987-12-10 Device for checking vehicle tires Expired DE3741818C1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE19873741818 DE3741818C1 (en) 1987-12-10 1987-12-10 Device for checking vehicle tires
PCT/EP1988/001046 WO1989005238A1 (en) 1987-12-10 1988-11-18 Device for monitoring vehicle tyres

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19873741818 DE3741818C1 (en) 1987-12-10 1987-12-10 Device for checking vehicle tires

Publications (1)

Publication Number Publication Date
DE3741818C1 true DE3741818C1 (en) 1989-05-11

Family

ID=6342263

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19873741818 Expired DE3741818C1 (en) 1987-12-10 1987-12-10 Device for checking vehicle tires

Country Status (2)

Country Link
DE (1) DE3741818C1 (en)
WO (1) WO1989005238A1 (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4009540A1 (en) * 1990-03-24 1991-09-26 Teves Gmbh Alfred TIRE PRESSURE MONITORING METHOD AND SYSTEM
EP0578826A4 (en) * 1991-11-11 1993-11-15 Nippon Denso Co Tire pneumatic pressure sensor.
DE19618659A1 (en) * 1996-05-09 1997-11-13 Continental Ag Air pressure control system
DE19618658A1 (en) * 1996-05-09 1997-11-13 Continental Ag Air pressure control system
EP0808731A2 (en) * 1996-05-23 1997-11-26 Toyota Jidosha Kabushiki Kaisha Apparatus for estimating vehicle tire air pressure from not only tired wheel motion but also tire temperature
WO2001097159A1 (en) 2000-06-12 2001-12-20 Foster-Miller, Inc. Tire defect detection system and method
WO2005035279A1 (en) * 2003-10-09 2005-04-21 Societe De Technologie Michelin Acoustic signal monitoring system for a tire
DE102018219669A1 (en) * 2018-11-16 2020-05-20 Zf Friedrichshafen Ag Method and system for determining tire parameters of a vehicle

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0016991A2 (en) * 1979-03-12 1980-10-15 Siemens Aktiengesellschaft Tyre pressure monitoring device
DE3412949A1 (en) * 1984-04-06 1985-10-17 Dr.Ing.H.C. F. Porsche Ag, 7000 Stuttgart DEVICE FOR CONTROLLING THE AIR PRESSURE OF VEHICLE TIRES
DE3446248A1 (en) * 1984-12-19 1986-06-19 Robert Bosch Gmbh, 7000 Stuttgart SENSOR FOR MEASURING PHYSICAL SIZES AND METHOD FOR ADJUSTING THE SENSOR
US4695823A (en) * 1984-04-27 1987-09-22 Vernon Roger W Vehicle tire monitoring apparatus

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2536332C2 (en) * 1975-08-14 1977-10-20 Gebr Hofmann GmbH & Co KG, Maschinen fabrik 6100 Darmstadt Method and device for checking the uniformity of bodies of revolution, in particular motor vehicle tires
SE416919B (en) * 1979-04-03 1981-02-16 Brajnandan Sinha DEVICE FOR INDICATING CHANGE IN PRESSURE IN VEHICLE TIRES
US4425798A (en) * 1980-03-26 1984-01-17 Kawasaki Steel Corporation Apparatus for diagnosing abnormalities in rotating machines
GB2088607B (en) * 1980-11-20 1984-08-08 Dunlop Ltd Tyre failure warning systems
DE3236520A1 (en) * 1982-10-02 1984-04-05 Robert Bosch Gmbh, 7000 Stuttgart Device for indicating the state of vehicle tyres

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0016991A2 (en) * 1979-03-12 1980-10-15 Siemens Aktiengesellschaft Tyre pressure monitoring device
DE3412949A1 (en) * 1984-04-06 1985-10-17 Dr.Ing.H.C. F. Porsche Ag, 7000 Stuttgart DEVICE FOR CONTROLLING THE AIR PRESSURE OF VEHICLE TIRES
US4695823A (en) * 1984-04-27 1987-09-22 Vernon Roger W Vehicle tire monitoring apparatus
DE3446248A1 (en) * 1984-12-19 1986-06-19 Robert Bosch Gmbh, 7000 Stuttgart SENSOR FOR MEASURING PHYSICAL SIZES AND METHOD FOR ADJUSTING THE SENSOR

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
JP 61-211108A. In: Patents Abstracts of Japan, Sect. M, Vol.11 (1987), Nr.48 (M-561) *

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4009540A1 (en) * 1990-03-24 1991-09-26 Teves Gmbh Alfred TIRE PRESSURE MONITORING METHOD AND SYSTEM
EP0578826A4 (en) * 1991-11-11 1993-11-15 Nippon Denso Co Tire pneumatic pressure sensor.
EP0783982A1 (en) * 1991-11-11 1997-07-16 Nippondenso Co., Ltd. Tire air pressure detecting device
DE19618659B4 (en) * 1996-05-09 2004-10-28 Continental Aktiengesellschaft Air pressure control system
DE19618658A1 (en) * 1996-05-09 1997-11-13 Continental Ag Air pressure control system
DE19618659A1 (en) * 1996-05-09 1997-11-13 Continental Ag Air pressure control system
EP0808731A2 (en) * 1996-05-23 1997-11-26 Toyota Jidosha Kabushiki Kaisha Apparatus for estimating vehicle tire air pressure from not only tired wheel motion but also tire temperature
EP0808731A3 (en) * 1996-05-23 1998-08-12 Toyota Jidosha Kabushiki Kaisha Apparatus for estimating vehicle tire air pressure from not only tired wheel motion but also tire temperature
WO2001097159A1 (en) 2000-06-12 2001-12-20 Foster-Miller, Inc. Tire defect detection system and method
EP1299846A1 (en) * 2000-06-12 2003-04-09 Foster-Miller, Inc. Tire defect detection system and method
EP1299846A4 (en) * 2000-06-12 2006-07-05 Foster Miller Inc Tire defect detection system and method
WO2005035279A1 (en) * 2003-10-09 2005-04-21 Societe De Technologie Michelin Acoustic signal monitoring system for a tire
DE102018219669A1 (en) * 2018-11-16 2020-05-20 Zf Friedrichshafen Ag Method and system for determining tire parameters of a vehicle

Also Published As

Publication number Publication date
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D1 Grant (no unexamined application published) patent law 81
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Owner name: SPIES, HANS, 8068 PFAFFENHOFEN, DE KAELBERER, GERH

8339 Ceased/non-payment of the annual fee