WO1991014586A1 - Procede et systeme de surveillance de la pression des pneus - Google Patents

Procede et systeme de surveillance de la pression des pneus Download PDF

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Publication number
WO1991014586A1
WO1991014586A1 PCT/EP1991/000150 EP9100150W WO9114586A1 WO 1991014586 A1 WO1991014586 A1 WO 1991014586A1 EP 9100150 W EP9100150 W EP 9100150W WO 9114586 A1 WO9114586 A1 WO 9114586A1
Authority
WO
WIPO (PCT)
Prior art keywords
tire
air pressure
wheel
function block
vehicle
Prior art date
Application number
PCT/EP1991/000150
Other languages
German (de)
English (en)
Inventor
Hubertus VON GRÜNBERG
Michael Hoffmann
Ulrich Neumann
Peter Rieth
Original Assignee
Alfred Teves 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 Alfred Teves Gmbh filed Critical Alfred Teves Gmbh
Publication of WO1991014586A1 publication Critical patent/WO1991014586A1/fr

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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
    • B60C23/06—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

Definitions

  • the invention relates to a method and to a system for monitoring the air pressure in the tires mounted on a vehicle.
  • Maintaining and monitoring the prescribed air pressure in the tires of a vehicle is particularly important for the driving behavior of the vehicle, for the life of the tire and for the fuel consumption.
  • the object of the invention is therefore to overcome this disadvantage and to develop a method for monitoring the tire pressure which works reliably and can nevertheless be carried out with an inexpensive arrangement or inexpensive components.
  • the respective spring rate taking into account vehicle-specific measurement data, such as loading, vehicle speed, slip angle, camber angle or the like, is used to infer the air pressure in the tires.
  • vehicle-specific measurement data such as loading, vehicle speed, slip angle, camber angle or the like.
  • the instantaneous air pressure in the individual tires can, for example, be displayed directly on a display panel in the dashboard of a motor vehicle.
  • tire-specific and vehicle-specific data influencing tire pressure such as tire temperature, vehicle loading, vehicle speed, operating time, brake actuation, etc.
  • tire pressure setpoint is measured as a function of these measured values ⁇ values or the limit values of the target pressure varies.
  • the data influencing the tire pressure are calculated approximately from the vehicle speed, the brake actuation or from other data already present, instead of a direct measurement with the aid of corresponding sensors, and these values are then calculated when determining the tire pressure. Setpoint or limit values are taken into account.
  • a further simplification, the tire pressure monitoring and savings is obtained if, as before, the vertical vibration method of the individual vehicle wheels is measured first and the natural frequencies of the wheel vertical movements are determined, and if the vibration behavior of the individual vehicle wheels or the respectively determined are then determined directly Natural frequencies are compared on an axis basis and warning signals are triggered as soon as the deviations exceed predetermined limit values.
  • the calculation and display of the air pressure in the individual tires is dispensed with in favor of less effort, and instead a different behavior of the two wheels of an axle is evaluated to detect a tire defect or pressure loss.
  • An arrangement or an air pressure monitoring system for carrying out the method according to the invention essentially consists of sensors for direct or indirect, wheel-specific measurement of the vertical wheel accelerations or corresponding quantities, such as the spring travel or spring travel, as well as an electronic circuit for evaluating the measurement signals and for generating warning signals when the tire pressure is not permitted.
  • Sensors for determining one or more of the following measured variables are expediently connected to the electronic evaluation circuit of the monitoring system:
  • characteristic values and characteristic fields for one or more of the following variables are stored in the evaluation circuit:
  • a particularly low production outlay for the air pressure monitoring system according to the invention results when it is combined with a 4-channel damping force control system and / or with an anti-lock or traction control system.
  • some of the information required for tire pressure monitoring can be obtained with the help of the sensors already required for the damping force control system or ABS / ASR, such as wheel sensors, acceleration sensors, etc.
  • the evaluation electronics can also be largely combined with the controller electronics.
  • FIG. 1 is a block diagram of the basic function of a monitoring system according to the invention
  • the invention is based on the knowledge that the desired information about the tire pressure can be obtained from an analysis of the vertical vibration behavior of the individual wheels. Therefore, in a first stage, which is symbolized by function block 1, the vertical vibration behavior of the wheel is analyzed. The natural frequencies of the wheel vertical movements are determined by means of a frequency analysis of the wheel vertical accelerations or analog variables such as the spring travel. The tire spring rate c R is then determined in function block 2 from these natural frequencies. This tire spring rate can be approximated using the formula
  • K (D) is a constant dependent on the damping measure
  • ⁇ is a measure of the unsprung mass of the wheel
  • £ is the natural wheel frequency
  • the tire pressure is then calculated from the tire spring rate c R in accordance with functional block 3. It becomes knowledge exploited that the tire spring rate is essentially dependent on fol lowing factors, namely
  • the prescribed operating pressure or the target value of the tire pressure is determined and compared with the current tire pressure.
  • the setpoint value of the tire pressure depends on the type and structure of the respective tire and on the tire temperature, that is to say on tire-specific data, also on the loading of the vehicle or the load on the wheel and on the driving speed. These are the most important influencing factors.
  • Function block ' 1 which is responsible for frequency analysis, in the present exemplary embodiment is supplied with the measured variables, symbolized by block 5, obtained with the aid of wheel-specific vertical acceleration sensors, symbolized by block 5. The same information can be obtained by measuring the spring travel. Characteristic values about the wheel mass and the damping of the wheel are required when calculating the tire spring rate. These characteristic values, symbolized by block 6, are stored in the electronics.
  • the vehicle or wheel speed, the load, the slip angle and the camber angle - these measured variables are symbolized by block 7 - can be determined with the aid of appropriate sensors. This information is required to calculate the tire pressure in the function block 3. When calculating the tire pressure, tire-specific variables must also be taken into account, which are stored in the electronics in the form of a tire map 8.
  • the tire maps symbolized by 8 ', are also required to determine the prescribed operating pressure or the desired value of the tire pressure.
  • the function block 4 is supplied with measured variables 9, namely via the vehicle and / or wheel speed, loading and tire temperature.
  • the accuracy in determining the tire pressure and the air pressure setpoint can be increased by further information, for example on the brake actuation, outside temperature, etc.
  • this information can either be obtained by measurement using appropriate sensors, or can be derived from other information or approximately determined.
  • the tire temperature can be approximated from the vehicle speed, the operating time, and information about the brake application etc. are derived.
  • sensors can be saved if necessary or replaced by sensors that are already present; This is particularly important if the vehicle is already equipped with a control system, such as a damping control, with an ABS or an ASR.
  • the tire pressure i.e. the actual tire pressure, possibly additionally the respective target value of the operating pressure and / or the deviation between the two variables, is displayed. If the deviation between the tire pressure determined and the air pressure setpoint exceeds predetermined limit values, optical and / or acoustic warning signals are triggered.
  • Fig. 3 illustrates a simplification of the described monitoring method and a corresponding monitoring system.
  • the natural frequencies of the vertical wheel movements are also determined in function block 1, to which sensors for the wheel-individual measurement of the wheel vertical accelerations or the spring travel are connected.
  • a function block 11 it is then only determined axially whether the natural frequencies of the two wheels of one axle (approximately) are the same. If the deviations exceed predetermined limits, this is interpreted and signaled as an indication of faulty tire pressure in one of the two compared wheels. The actual tire pressure is not displayed. In this way, the electronics and thus the entire tire pressure monitoring system can be considerably simplified and made cheaper.
  • the method according to the invention can be used particularly advantageously with the aid of appropriately programmed microprocessors. or microcomputers. By changing the stored characteristic values, it is very easy to adapt to the special conditions in this case when changing the tire or changing other parameters.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Measuring Fluid Pressure (AREA)
  • Vehicle Body Suspensions (AREA)

Abstract

Pour surveiller la pression des pneus, le comportement vibratoire vertical de chaque roue du véhicule est mesuré (bloc fonctionnel 5) et analysé. Les fréquences propres des mouvements verticaux des roues sont déterminées (bloc fonctionnel 1). La constante de flexibilité (bloc fonctionnel 2) est déduite de ces fréquences propres et la pression du pneu (bloc fonctionnel 3) est déduite de cette valeur caractéristique. La pression du pneu effective à un moment précis est comparée avec la valeur prescrite (bloc fonctionnel 4). Si l'écart est important, un signal d'alarme est déclenché (bloc 10).
PCT/EP1991/000150 1990-03-24 1991-01-26 Procede et systeme de surveillance de la pression des pneus WO1991014586A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19904009540 DE4009540A1 (de) 1990-03-24 1990-03-24 Verfahren und system zur reifendruckueberwachung
DEP4009540.1 1990-03-24

Publications (1)

Publication Number Publication Date
WO1991014586A1 true WO1991014586A1 (fr) 1991-10-03

Family

ID=6403005

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1991/000150 WO1991014586A1 (fr) 1990-03-24 1991-01-26 Procede et systeme de surveillance de la pression des pneus

Country Status (2)

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DE (1) DE4009540A1 (fr)
WO (1) WO1991014586A1 (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0578826A4 (fr) * 1991-11-11 1993-11-15 Nippon Denso Co Capteur de pression pour pneumatiques.
FR2694398A1 (fr) * 1992-08-03 1994-02-04 Michelin & Cie Procédé et dispositifs de détection de la mise en appui d'un pneumatique sur un appui de sécurité.
GB2270167A (en) * 1992-08-29 1994-03-02 Bosch Gmbh Robert Method and apparatus for the evaluation of wheel speed data in a motor vehicle
US5497657A (en) * 1991-11-11 1996-03-12 Nippondenso Co., Ltd. Tire air pressure detecting device
WO1996010505A1 (fr) * 1994-09-30 1996-04-11 Continental Aktiengesellschaft Procede et dispositif pour regler le patinage et/ou determiner la force longitudinale ou une grandeur proportionnelle au travail de flexion, et pneumatiques correspondants
US5553491A (en) * 1991-11-11 1996-09-10 Nippondenso Co., Ltd. Tire air pressure detecting device
EP0743202A1 (fr) * 1995-05-15 1996-11-20 General Motors Corporation Surveillance de la pression des pneus
US5596141A (en) * 1994-08-04 1997-01-21 Nippondenso Co., Ltd. Tire resonance frequency detecting system having inter-wheel noise elimination and method for the same
US5606122A (en) * 1994-09-09 1997-02-25 Nippondenso Co., Ltd. Tire pneumatic pressure detector

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4330617A1 (de) * 1993-09-09 1995-03-16 Bayerische Motoren Werke Ag Verfahren zur Bestimmung des Reifenluftdrucks von Fahrzeugrädern
DE4432892A1 (de) * 1994-09-15 1996-03-21 Bayerische Motoren Werke Ag Verfahren zum Ermitteln des Zustands einer Radaufhängungskomponente
DE19645897B4 (de) * 1996-11-07 2004-09-16 Daimlerchrysler Ag Fahrzeug mit den Rädern zugeordneten Lagegebern
DE19651968B4 (de) * 1996-12-13 2004-04-22 Continental Teves Ag & Co. Ohg Regelsystem für ein Fahrzeug mit gummibereiften Rädern
CA2226829C (fr) * 1997-03-11 2000-08-29 John Mantini Dispositif d'alerte rapide pour jantes de pneus et ensembles des moyeux
DE10044128A1 (de) * 2000-09-06 2002-05-29 Continental Ag Fahrwerk für Fahrzeuge und Verfahren zur Erkennung von Druckänderungen an Fahrzeugreifen
WO2003016115A1 (fr) * 2001-07-30 2003-02-27 Continental Teves Ag & Co. Ohg Procede destine a determiner la charge imposee a un pneumatique de vehicule
DE10140436A1 (de) * 2001-08-17 2003-03-06 Porsche Ag Anzeigevorrichtung für den Reifeninnendruck
DE10218781A1 (de) * 2002-04-26 2003-11-13 Tuev Automotive Gmbh Auf einer Felge montierbarer Luftreifen, Sensornetz, Umdrehungsmesseinheit und Fahrzeugüberwachungssystem
DE60331108D1 (de) 2003-07-04 2010-03-11 Pirelli Verfahren und system zum bestimmen einer reifenbelastung während des fahrens eines kraftfahrzeugs
DE10331585A1 (de) * 2003-07-08 2005-03-31 Continental Teves Ag & Co. Ohg Verfahren zur Ermittlung des Innendrucks eines Fahrzeugreifens
DE102005004955A1 (de) * 2005-02-03 2006-08-17 Daimlerchrysler Ag Verfahren zur Reifendruckregelung bei einem Kraftfahrzeug
FR2889111B1 (fr) * 2005-07-26 2007-10-19 Peugeot Citroen Automobiles Sa Systeme de determination de la pression de gonflage de pneumatiques montes sur des roues avant et arriere d'un vehicule automobile
FR2891055B1 (fr) * 2005-09-16 2007-12-28 Peugeot Citroen Automobiles Sa Dispositif et procede de mesure d'une quantite representative de la vitesse de rotation d'une roue de vehicule automobile et systeme et procede utilisant un tel dispositif et un tel procede.
DE102006006947A1 (de) * 2006-02-14 2007-08-23 Daimlerchrysler Ag Verfahren und Vorrichtung zur Erkennung des Luftdrucks eines Fahrzeugreifens
DE102019209137A1 (de) * 2019-06-25 2020-12-31 Zf Friedrichshafen Ag Verfahren zum Prüfen des Reifendrucks eines Fahrzeugs
DE102019219526B4 (de) * 2019-12-13 2021-07-22 Volkswagen Aktiengesellschaft Verfahren, Computerprogramm und Vorrichtung zum Bereitstellen einer Masse eines Rades eines Kraftfahrzeugs
DE102020123278B4 (de) 2020-09-07 2024-03-07 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Verfahren zur Detektion einer Zustandsänderung eines Kraftfahrzeugs und Kraftfahrzeug
DE102022127443A1 (de) 2022-10-19 2024-04-25 Bayerische Motoren Werke Aktiengesellschaft Verfahren zum Prognostizieren eines Drucks in einem Fahrzeugreifen sowie Fahrzeug

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Publication number Priority date Publication date Assignee Title
EP0022096A2 (fr) * 1979-04-03 1981-01-07 Brajnandan Sinha Dispositif d'indication de pression de pneumatiques de véhicule
US4574267A (en) * 1982-05-06 1986-03-04 Trw Inc. Tire pressure warning system
WO1988008593A1 (fr) * 1987-04-30 1988-11-03 Lehn F Heinrich Dispositif de controle des vibrations dans des vehicules a moteur en marche

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DE2905931C2 (de) * 1979-02-16 1985-12-19 Daimler-Benz Ag, 7000 Stuttgart Vorrichtung zur Überwachung von Stoßdämpfern und Reifenluftdruck von Fahrzeugrädern
US4355294A (en) * 1980-05-02 1982-10-19 Automation Industries, Inc. Altitude alert system
DE3151254C2 (de) * 1981-12-24 1984-04-26 Bayerische Motoren Werke AG, 8000 München Prüfvorrichtung für den Reifenluftdruck von Rädern an Fahrzeugen und Verfahren für eine derartige Vorrichtung
DE3236594A1 (de) * 1982-10-02 1984-04-05 Wabco Westinghouse Fahrzeugbremsen GmbH, 3000 Hannover Reifendruck-regelanlage
DE3541494A1 (de) * 1985-11-23 1987-05-27 Continental Gummi Werke Ag Vorrichtung zur reifendruckueberwachung an fahrzeugen
DE3741818C1 (de) * 1987-12-10 1989-05-11 Messerschmitt Boelkow Blohm Vorrichtung zur Kontrolle von Fahrzeugreifen

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0022096A2 (fr) * 1979-04-03 1981-01-07 Brajnandan Sinha Dispositif d'indication de pression de pneumatiques de véhicule
US4574267A (en) * 1982-05-06 1986-03-04 Trw Inc. Tire pressure warning system
WO1988008593A1 (fr) * 1987-04-30 1988-11-03 Lehn F Heinrich Dispositif de controle des vibrations dans des vehicules a moteur en marche

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0578826A4 (fr) * 1991-11-11 1993-11-15 Nippon Denso Co Capteur de pression pour pneumatiques.
EP0578826A1 (fr) * 1991-11-11 1994-01-19 Nippondenso Co., Ltd. Capteur de pression pour pneumatiques
US5497657A (en) * 1991-11-11 1996-03-12 Nippondenso Co., Ltd. Tire air pressure detecting device
EP0783982A1 (fr) * 1991-11-11 1997-07-16 Nippondenso Co., Ltd. Appareil de détection de la pression de pneumatiques
US5553491A (en) * 1991-11-11 1996-09-10 Nippondenso Co., Ltd. Tire air pressure detecting device
FR2694398A1 (fr) * 1992-08-03 1994-02-04 Michelin & Cie Procédé et dispositifs de détection de la mise en appui d'un pneumatique sur un appui de sécurité.
WO1994003338A1 (fr) * 1992-08-03 1994-02-17 Compagnie Generale Des Etablissements Michelin-Michelin & Cie Procede et dispositifs de detection de la mise en appui d'un pneumatique sur un appui de securite
GB2270167A (en) * 1992-08-29 1994-03-02 Bosch Gmbh Robert Method and apparatus for the evaluation of wheel speed data in a motor vehicle
US5596141A (en) * 1994-08-04 1997-01-21 Nippondenso Co., Ltd. Tire resonance frequency detecting system having inter-wheel noise elimination and method for the same
US5606122A (en) * 1994-09-09 1997-02-25 Nippondenso Co., Ltd. Tire pneumatic pressure detector
WO1996010505A1 (fr) * 1994-09-30 1996-04-11 Continental Aktiengesellschaft Procede et dispositif pour regler le patinage et/ou determiner la force longitudinale ou une grandeur proportionnelle au travail de flexion, et pneumatiques correspondants
US5913240A (en) * 1994-09-30 1999-06-15 Continental Aktiengesellschaft Method and device for controlling slip and/or for determining the longitudinal force or a flex work-proportional parameter, and vehicle tire therefore
EP0743202A1 (fr) * 1995-05-15 1996-11-20 General Motors Corporation Surveillance de la pression des pneus
US5604482A (en) * 1995-05-15 1997-02-18 General Motors Corporation Tire pressure monitor

Also Published As

Publication number Publication date
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