WO2007014596A1 - Procede pour surveiller la pression de pneus de vehicules avec un appareil de commande, une memoire electronique et un module de pneu monte dans un pneu de vehicule - Google Patents

Procede pour surveiller la pression de pneus de vehicules avec un appareil de commande, une memoire electronique et un module de pneu monte dans un pneu de vehicule Download PDF

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Publication number
WO2007014596A1
WO2007014596A1 PCT/EP2006/005822 EP2006005822W WO2007014596A1 WO 2007014596 A1 WO2007014596 A1 WO 2007014596A1 EP 2006005822 W EP2006005822 W EP 2006005822W WO 2007014596 A1 WO2007014596 A1 WO 2007014596A1
Authority
WO
WIPO (PCT)
Prior art keywords
tire
pressure
value
temperature
warning
Prior art date
Application number
PCT/EP2006/005822
Other languages
German (de)
English (en)
Inventor
Adrian Cyllik
Jörg HANNA
Jörg Lehmann
Original Assignee
Continental Aktiengesellschaft
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 Continental Aktiengesellschaft filed Critical Continental Aktiengesellschaft
Priority to EP06754421A priority Critical patent/EP1912805A1/fr
Publication of WO2007014596A1 publication Critical patent/WO2007014596A1/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
    • B60C23/02—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

Definitions

  • a method of tire pressure monitoring of vehicles having a controller, an electronic memory, and a tire module disposed in a vehicle tire
  • the invention relates to a method for tire pressure monitoring of vehicles having a control unit, an electronic memory and a tire module arranged in a vehicle tire.
  • Transponder-equipped tire modules are used in the tire for various tasks. This includes in particular a tire identification, with the one
  • Car manufacturer u. a. quickly and automatically determine from which tire plant a particular tire was delivered and to which vehicle the tire was mounted. Other tasks are usually an air pressure monitoring, a temperature measurement or the measurement of mechanical stress conditions in the tire.
  • Modern transponders consist of an electronic component or chip in which sensor elements can be arranged as well as of an antenna connected to this electronic component. An example of such a transponder is disclosed in DE 102 43 441 A1.
  • the object of the invention was to provide a method with which the warning strategy for warning the driver is improved in a simple manner and the number of false warnings is reduced.
  • Vehicles having a control unit, an electronic memory and a tire module arranged in a vehicle tire, comprising the following steps:
  • An advantage of the invention is to be seen in particular in that by the parallel interrogation of two critical pressure thresholds, a more accurate monitoring of a pressure loss takes place and thereby the warning strategy of the tire pressure monitoring is considerably improved.
  • the temperature-compensated and non-temperature-compensated pressure value are checked in parallel in the process, so to speak.
  • the non-temperature-compensated pressure calculation or the absolute pressure method is set such that the warning is output as soon as the second critical pressure value is undershot, regardless of the currently measured temperature.
  • Both pressure value comparisons with the first critical pressure threshold value and the second critical pressure threshold value are logically linked to one another via an OR operation.
  • the warning thresholds with the associated critical pressure thresholds can be specified more precisely, so that the number of false alarms are significantly reduced.
  • the temperature-compensated second pressure value can be determined in a simple manner.
  • the temperature value and the pressure value are stored again in a reset of the memory and these values are used as input values for the pressure determination equation. This ensures that the algorithm always works with current reference values.
  • the first critical pressure threshold is determined during the reset of the memory and stored in the memory. This ensures that the first critical pressure threshold takes into account the corresponding boundary conditions.
  • the first critical pressure threshold value comprises two pressure threshold values "low” and “high”, wherein the pressure threshold value "low” is 90% of the recommended tire pressure value and triggers a first low warning level when exceeded and the pressure threshold value , "high” is 80% of the recommended tire pressure value and, if exceeded, a second high warning level is triggered.
  • the low pressure threshold is usually sufficient to trigger a first low warning level
  • the second high level warning signal indicates that the driver is promptly correcting the tire pressure.
  • the second critical pressure threshold is stored permanently in the memory and this is about 70% of the recommended tire pressure value. At this pressure threshold, a second high warning level would be activated immediately, prompting the driver to promptly correct the tire pressure.
  • a temperature sensor is arranged on the tire inner side and thereby temperature changes of the tread are detected.
  • temperature measurements are usually made with modules mounted to the rim.
  • the measured temperatures are strongly influenced by the heat radiation and heat conduction of the brake disc.
  • the displayed values do not correspond to the temperatures at the critical points in the tire.
  • the temperature measurement on the inside of the tire for example, in the zenith on the inside of the tire, however, can detect changes in temperature of the tread very accurately. In this way, a critical operating condition caused by underpressure or overload that heats the tire above normal operating temperature can be detected quickly.
  • a separate temperature measurement takes place and a warning is issued, provided that a temperature of one tire deviates by more than 10% compared to the other.
  • Another criterion for a critical tire condition is the large deviation in temperature of a single tire compared to all other tires on the vehicle. Thus, by this comparison, a critical tire condition of a tire can be easily determined.
  • Fig. 1 is a warning strategy for the tire pressure control and Fig. 2 shows the temperature influence on the tire pressure.
  • the primary task of the tire module is to monitor the air pressure and temperature of a tire.
  • a transponder tire module with pressure and temperature sensor in the tire This tire module has a size of approx. 30 * 30 mm 2 and is firmly connected to the tire on the inside of the tire.
  • the receiving unit is an approx. 160 * 160 mm 2 large antenna module with evaluation electronics.
  • MM master module
  • SM slave module
  • Each vehicle has only one master module. It contains a more powerful microcontroller than the slave modules, which handles the control of all other modules, processes the measured values and ensures the data connection to the vehicle via the CAN bus.
  • Slave modules are attached to the remaining wheel positions, which are connected to the master module via the LIN bus.
  • the master module has control over the slave modules and runs the software for monitoring the pressure and temperature of each tire. If values are identified that indicate an unsafe or even dangerous operation, the master module places this information on the CAN bus, so that corresponding warnings can be displayed in the dashboard or instrument panel of the vehicle.
  • the driver is informed by two different warnings, a first low warning level or a second high warning level, in the dashboard about the condition of the tires.
  • the first low warning also called yellow warning, appears, for example, when the tire pressure has dropped by approx. 10%, ie is less than 90% of the recommended tire pressure. With such a reduced pressure, the tire can be operated safely for a certain tolerance time interval.
  • the first low warning prompts the driver to replenish the tire pressure at his next scheduled break or next gas station visit.
  • the second high warning level which is displayed as a red warning in the dashboard, for example, is displayed at a pressure loss of 20% and more. If the pressure of a tire has dropped so much, then the driver must immediately use the next opportunity to hold to correct the tire pressure.
  • step 1.1 the main loop is started first.
  • step 2.1 measured values of the individual tire modules are then interrogated and read into the master module.
  • step 3.1 the calculation of averages takes place.
  • step 4.1 a compensation calculation is performed with the pressure calculation equation of the second pressure value with the temperature measured in parallel.
  • step 5.1 the first pressure value is first checked without temperature compensation.
  • step 5.2 it is checked whether the current temperature-compensated second pressure value has fallen below one of the pressure threshold values for the first low warning level or the second high warning level.
  • step 5.3 the pressure gradient value is checked and it is determined whether it has adhered to the specified tolerance values.
  • step 5.4 it is checked whether the driver has already long ignored the first low warning level. This is the case when z. B. the predetermined tolerance distance or the predetermined tolerance time interval is exceeded.
  • step 5.5 it is further checked whether the measured tire temperature has exceeded a certain critical value. If the critical value is exceeded, the second high warning level is also activated.
  • step 5.6 the load history of each individual vehicle tire is summed and stored in non-erasable memory. By evaluating the load history, it can later be determined over which distance and over what time interval the corresponding tire has been operated with reduced pressure.
  • step 6.1 it is checked whether one of the two warning levels is activated. Subsequently, either the first low or second high warning level is activated if one of the criteria of steps 5.1 to 5.6 is met. Finally, in step 6.2, the main loop is restarted.
  • FIG. 2 shows the temperature influence on the tire pressure. On the y-axis the tire pressure is in bar and on the x-axis the temperature is plotted in degrees Celsius.
  • the curve 1 shows the curve of a tire that was filled at 60 ° C with a pressure of 8 bar. With decreasing temperature also decreases the measured

Landscapes

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

Abstract

L'invention concerne un procédé permettant de surveiller la pression de pneus de véhicules avec un appareil de commande, une mémoire électronique et un module de pneu monté dans un pneu de véhicule. L'invention vise à mettre au point un procédé permettant d'améliorer la stratégie d'avertissement pour avertir le conducteur et de réduire le nombre de messages d'avertissement erronés. A cet effet, il est prévu le procédé comprenant les étapes suivantes: déterminer une première valeur de pression dans le pneu du véhicule concerné; calculer une seconde valeur de pression compensée en température, dans laquelle la valeur de température actuelle est prise en compte dans une équation conditionnelle de pression; comparer la seconde valeur de pression avec une première valeur-seuil de pression critique; déclencher un message d'avertissement à condition que la seconde valeur de pression se situe en dessous de la première valeur-seuil de pression critique ou que la première valeur de pression se situe en dessous d'une seconde valeur-seuil de pression critique.
PCT/EP2006/005822 2005-08-01 2006-06-17 Procede pour surveiller la pression de pneus de vehicules avec un appareil de commande, une memoire electronique et un module de pneu monte dans un pneu de vehicule WO2007014596A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP06754421A EP1912805A1 (fr) 2005-08-01 2006-06-17 Procede pour surveiller la pression de pneus de vehicules avec un appareil de commande, une memoire electronique et un module de pneu monte dans un pneu de vehicule

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005036594.9 2005-08-01
DE200510036594 DE102005036594A1 (de) 2005-08-01 2005-08-01 Verfahren zur Reifendrucküberwachung von Fahrzeugen mit einem Steuergerät, einem elektronischen Speicher und einem in einem Fahrzeugreifen angeordneten Reifenmodul

Publications (1)

Publication Number Publication Date
WO2007014596A1 true WO2007014596A1 (fr) 2007-02-08

Family

ID=36752001

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2006/005822 WO2007014596A1 (fr) 2005-08-01 2006-06-17 Procede pour surveiller la pression de pneus de vehicules avec un appareil de commande, une memoire electronique et un module de pneu monte dans un pneu de vehicule

Country Status (3)

Country Link
EP (1) EP1912805A1 (fr)
DE (1) DE102005036594A1 (fr)
WO (1) WO2007014596A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006039518A1 (de) * 2006-08-23 2007-11-22 Siemens Ag Verfahren und Anordnung zum Überwachen des Reifendrucks eines Fahrzeuges
GB0706092D0 (en) * 2007-03-29 2007-05-09 Schrader Electronics Ltd Apparatus and method for adaptive temperature compensation in a presure monitoring system
JP6252579B2 (ja) * 2015-11-10 2017-12-27 トヨタ自動車株式会社 タイヤ空気圧監視装置
DE102016225429A1 (de) 2016-12-19 2018-06-21 Continental Automotive Gmbh Steuereinrichtung und elektronische Radeinheit für ein Radüberwachungssystem eines Fahrzeuges, Radüberwachungssystem eines Fahrzeuges und Verfahren zur Radüberwachung in einem Fahrzeug

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4909074A (en) * 1985-11-07 1990-03-20 Uniroyal Englebert Reifen Gmbh Method of determining a variable air pressure value of a pneumatic vehicle tire and indicating a pressure value
EP1384604A1 (fr) 2002-07-24 2004-01-28 The Goodyear Tire & Rubber Company Méthode pour traiter d'information dans un système de surveillance de la pression d'un pneu
DE10243441A1 (de) 2002-09-18 2004-04-01 Continental Aktiengesellschaft Transponder für Reifen

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1309460B1 (fr) * 2000-07-26 2010-08-25 Bridgestone Americas Tire Operations, LLC Systeme electronique de gestion de pneus
US6854324B2 (en) * 2002-12-20 2005-02-15 The Goodyear Tire & Rubber Company Tire monitoring apparatus

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4909074A (en) * 1985-11-07 1990-03-20 Uniroyal Englebert Reifen Gmbh Method of determining a variable air pressure value of a pneumatic vehicle tire and indicating a pressure value
EP1384604A1 (fr) 2002-07-24 2004-01-28 The Goodyear Tire & Rubber Company Méthode pour traiter d'information dans un système de surveillance de la pression d'un pneu
DE10243441A1 (de) 2002-09-18 2004-04-01 Continental Aktiengesellschaft Transponder für Reifen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP1912805A1 *

Also Published As

Publication number Publication date
EP1912805A1 (fr) 2008-04-23
DE102005036594A1 (de) 2007-02-08

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