DE10007558A1 - Device or system for detecting optimum tire inflation pressure has evaluation unit for assessing tire pressure sensor and further sensor measurement values - Google Patents
Device or system for detecting optimum tire inflation pressure has evaluation unit for assessing tire pressure sensor and further sensor measurement valuesInfo
- Publication number
- DE10007558A1 DE10007558A1 DE2000107558 DE10007558A DE10007558A1 DE 10007558 A1 DE10007558 A1 DE 10007558A1 DE 2000107558 DE2000107558 DE 2000107558 DE 10007558 A DE10007558 A DE 10007558A DE 10007558 A1 DE10007558 A1 DE 10007558A1
- Authority
- DE
- Germany
- Prior art keywords
- tire
- sensor
- values
- evaluation unit
- air pressure
- 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.)
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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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
Description
Der Erfindung liegt die Aufgabe zugrunde, den für eine bestimmte Fahrweise und Nutzungsart eines Kraftfahrzeugs optimalen Reifenluftdruck dynamisch zu bestimmen.The invention has for its object the one for a certain driving style and use To determine the vehicle's optimum tire pressure dynamically.
Bisher wird der für einen bestimmten Kraftfahrzeugtyp erforderliche Reifenluftdruck zumeist an hand einer Tabelle eingestellt, die in vielen Versuchsreihen vom Fahrzeughersteller oder Reifenher steller ermittelt wurde. Diese Tabelle enthält üblicherweise Angaben zur Beladung, berücksichtigt aber weder die individuelle Fahrweise noch zum Beispiel die im üblichen Nutzungsbereich des Kraftfahrzeugs vorkommenden Straßenverhältnisse. Auch typische witterungsbedingte Einflüsse wie ein Betrieb des Fahrzeugs im Hochgebirge bleiben in der Tabelle im allgemeinen unberücksich tigt.So far, the tire air pressure required for a certain type of motor vehicle has mostly been indicated hand a table set, in many test series by the vehicle manufacturer or tire manufacturer was determined. This table usually contains information about the loading but neither the individual driving style nor, for example, that in the usual area of use of the Motor vehicle occurring road conditions. Also typical weather-related influences Like operating the vehicle in high mountains, the table generally does not take into account does.
Aus dem Rennsport ist jedoch bekannt, daß eine individuelle Anpassung des Reifenluftdrucks an die Strecke und die individuelle Fahrweise des Fahrers erhebliche Vorteile zum Beispiel in Hinblick auf das Traktionsverhalten oder das Bremsverhalten hat. Daneben bedeuten weichere Reifen einen erhöhten Abrollkomfort, der allerdings wieder zu Lasten des Verbrauchs geht.However, it is known from racing that an individual adjustment of the tire air pressure takes place the route and the individual driving style of the driver, for example, have considerable advantages on the traction behavior or the braking behavior. In addition, softer tires mean one increased rolling comfort, which, however, is at the expense of consumption.
Eine individuelle Ermittlung des für den jeweiligen Fahrstil und die übliche Nutzungsweise sinn vollen Reifenluftdrucks ist jedoch für den Normalfahrer nicht zumutbar. Eine automatische Ermitt lung wäre daher ebenso wünschenswert wie auch Warnhinweise zum Reifenzustand oder Vorschlä ge zur Auswahl geeigneter Reifen oder zur Erneuerung dieser.An individual determination of the sense for the respective driving style and the usual use full tire pressure is not reasonable for normal drivers. An automatic investigation It would therefore be just as desirable as warnings about the condition of the tires or suggestions to select suitable tires or to renew them.
Das Problem wird erfindungsgemäß durch das in Patentanspruch 1. beschriebene System gelöst, dessen Funktion im folgenden anhand eines Ausführungsbeispiels erläutert wird:According to the invention, the problem is solved by the system described in claim 1, whose function is explained below using an exemplary embodiment:
Das System erhält ständig Informationen über den aktuellen Reifenluftdruck sowie Informationen von weiteren Fahrwerkssensoren. In Zeichnung 1 ist dies beispielhaft für ein einzelnes Rad darge stellt. Der Reifendruck kann beispielsweise drahtlos kontinuierlich von der Auswerteeinheit abge fragt werden, ein solches System ist im Patent DE 197 02 768 desselben Erfinders beschrieben. Im Rahmen dieser Übertragung kann ebenfalls die Reifenlufttemperatur übertragen werden. In der Zeichnung ist dies durch die drahtlos angebundenen Sensoren DS1 für den Reifenluftdruck und TS1 für die Reifenlufttemperatur sowie den gemeinsamen Empfänger E1 symbolisch dargestellt. Dane ben wird beispielsweise das Tachosignal vom Sensor VS1 ebenfalls an die Auswerteeinheit R1 (Rechner mit Mikrocomputer) übermittelt.The system constantly receives information about the current tire pressure as well as information from further chassis sensors. In Figure 1, this is an example of a single wheel Darge poses. The tire pressure can, for example, be continuously monitored wirelessly by the evaluation unit be asked, such a system is described in patent DE 197 02 768 by the same inventor. in the The tire air temperature can also be transmitted as part of this transmission. In the This is shown by the wireless sensors DS1 for tire pressure and TS1 for the tire air temperature and the common receiver E1. Dane For example, the tachometer signal from sensor VS1 is also sent to evaluation unit R1 (Computer with microcomputer) transmitted.
In einer besonders bevorzugten Ausgestaltung der Erfindung werden zudem Signale über den aktu ellen Federweg in die Auswerteeinheit übertragen. In a particularly preferred embodiment of the invention, signals via the actu Transfer the spring travel to the evaluation unit.
Im Speicher des Mikrocomputers der Auswerteeinheit sind nun Kennfelder abgelegt, welche anhand von Versuchsreihen ermittelt wurden. Mit diesen Kennfeldern sowie der Gleichung des allgemeinen Gasgesetzes wird nun durch einen zeitlichen Vergleich der gemessenen Temperatursteigerung im Reifen nach Fahrtantritt mit der voreilenden Drucksteigerung ebenfalls infolge der Temperaturer höhung und der Fahrtgeschwindigkeit sowie deren Zeitableitung zur Bestimmung der Beschleuni gungs- und Bremsvorgänge abgelesen, inwieweit die Temperaturerhöhung im Reifen direkt durch die lokale Erwärmung der Lauffläche oder durch die Erwärmung der Felge infolge insbesondere von Bremsvorgängen und der Abstrahlung der Bremsleistung auf die Felgen resultiert. Da in beiden Fällen ein jeweils anderer Wärmetransportmechanismus vorliegt, wird sich dies an einem unter schiedlichen Zeitverhalten, insbesondere im Verhältnis der lokalen Temperaturmessung des Reifen luftdrucksensors an der Felge im Vergleich zur indirekten Messung der Lufttemperatur im Reifen über das allgemeine Gasgesetz mittels des Reifenluftdrucks bemerkbar machen. Aus diesem Unterschied kann die direkt in der Lauffläche erzeugte Walkleistung errechnet werden und bei zu hoher Walkleistung ein Hinweis zur Erhöhung des Luftdrucks gegeben werden.Characteristic maps are now stored in the memory of the microcomputer of the evaluation unit, which are based on of series of experiments were determined. With these maps as well as the general equation Gas law is now by a time comparison of the measured temperature increase in the Tires after driving with the leading pressure increase also due to the temperature elevation and the speed of travel as well as their time derivation to determine the acceleration and braking processes read to what extent the temperature increase in the tire directly the local warming of the tread or due to the warming of the rim in particular of braking processes and the radiation of braking power on the rims results. Because in both If there is a different heat transport mechanism in each case, this will affect one of the different time behavior, especially in relation to the local temperature measurement of the tire air pressure sensor on the rim compared to the indirect measurement of the air temperature in the tire make it noticeable via the general gas law by means of tire air pressure. For this Difference can be calculated directly in the tread generated walking performance and at too high flexing performance an indication to increase the air pressure can be given.
Um eine möglichst direkte Messung der Felgentemperatur zu ermöglichen, wird der Sensor ver nünftigerweise auf die Felge geklebt, z. B. mittels einer Abziehklebefolie. Denkbar ist auch ein wei terer Temperaturkanal, z. B. für die getrennte Übertragung der Felgentemperatur und der sensor nahen Reifenlufttemperatur, um den Wärmefluss kontrollieren zu können und gleichzeitig über den verzögerten Temperaturanstieg eine Überwachung des temperaturbedingten Druckanstiegs und somit der insgesamt vorhandenen Luftmasse im Reifen durchführen zu können. Sollte die Luft masse unerwartet abnehmen, so kann schon sehr frühzeitig eine Warnmeldung gegeben werden.In order to enable the rim temperature to be measured as directly as possible, the sensor is ver glued to the rim in the future, e.g. B. by means of a peel-off adhesive film. A white is also conceivable terer temperature channel, e.g. B. for the separate transmission of the rim temperature and the sensor near tire air temperature in order to be able to control the heat flow and at the same time via the delayed temperature rise a monitoring of the temperature-related pressure rise and to be able to carry out the total air mass in the tire. Should the air weight unexpectedly decrease, so a warning can be given very early.
In einer besonders bevorzugten Ausgestaltung der Erfindung wird die so ermittelte Walkleistung zusammen mit der mittleren Fahrgeschwindigkeit, der Spitzengeschwindigkeit und dem Beladungs zustand in ein mathematisches Fahrwerksmodell eingespeist, um so zum Beispiel bei hoher Bela dung den Hinweis zur Druckerhöhung noch frühzeitiger geben zu können. Umgekehrt kann dieses Modell bei zu heftigen Federschlägen, welche sich aus den von den Federwegsensoren gelieferten Daten und deren ersten und zweiten Zeitableitungen ergeben können, eine Komforterhöhung durch Absenkung des Reifenluftdrucks vorschlagen.In a particularly preferred embodiment of the invention, the flexing power determined in this way is together with the average driving speed, the top speed and the load state fed into a mathematical chassis model, for example with a high load to be able to provide information on increasing the pressure even earlier. Conversely, this can Model in case of too violent spring strokes, which result from those supplied by the travel sensors Data and their first and second time derivatives can result in an increase in comfort Propose a reduction in tire pressure.
Dazu kann dieses Modell im Rahmen einer was-wäre-wenn-Optimierung auch mit verschiedenen theoretischen Reifenluftdruckwerten die Folgen für das Fahrverhalten durchspielen und dieses gegen Zielwerte vergleichen. Mittels der aus der Mathematik und Informatik bekannten Opti mierungsmethoden, insbesondere Gradientenverfahren, evolutionären Algorithmen, dynamischer Optimierung oder neuronaler Netzwerke läßt sich dann ein Reifenluftdruckwert nahe dem Optimum ermitteln.For this purpose, this model can also be used with different as part of what-if optimization theoretical tire pressure values play through the consequences for driving behavior and this compare against target values. Using the Opti known from mathematics and computer science mation methods, especially gradient methods, evolutionary algorithms, more dynamic Optimization or neural networks can then achieve a tire air pressure value close to the optimum determine.
Natürlich kann ein solches Modell andererseits auch genutzt werden, um die Kennfelder zur Ermitt lung der Walkleistung und anderer Parameter durch eine genauere Lösung zu ersetzen. Dabei können auch Korrelationsverfahren, insbesondere Kreuz- und Autokorrelationen zum Einsatz kommen, welche wiederum auch die Modellparameter verbessern helfen können, bis hin zu einem selbstlernenden System, welches sich an die typische Nutzungsart und Fahrweise dieses Fahrzeugs anpaßt.Of course, such a model can also be used to determine the maps to replace the flexing performance and other parameters with a more precise solution. there can also use correlation methods, especially cross and auto correlations come, which in turn can also help to improve the model parameters, down to one self-learning system, which is based on the typical use and driving style of this vehicle adjusts.
Zusammen mit den Korrelationsverfahren können für diese Erfindung auch bevorzugt Prädiktor filter zur Vorhersage von Größen verwendet werden, hier sind als Basis Wiener-Hopf und Kalman- Filter sowie deren dynamische Anpassung mittels der Autokorrelationsfunktionen besonders gut ge eignet. Together with the correlation methods, this invention can also be used as a preferred predictor Filters for predicting sizes can be used, as a basis here Wiener-Hopf and Kalman- Filters and their dynamic adjustment using the autocorrelation functions are particularly good is suitable.
Die aus den Fahrwerksmodell resultierenden Ergebnisse werden sinnvollerweise noch einer statisti schen Behandlung, insbesondere Mittelwertbildung und Kontrolle der Standardabweichung unterzo gen, um kurzeitige Ausreißer zu unterdrücken. Danach können die Ergebnisse zur Generierung von Hinweisen und Warnmeldungen an den Fahrer genutzt werden, in der Zeichnung ist dies durch das Display D1 symbolisiert, auf dem gleichzeitig der Soll- und der Istwert des Reifenluftdrucks gegen übergestellt werden. Dabei sollte sich der vorgeschlagene Reifenluftdruck nur innerhalb eines fahr werkspeziflschen Wertebereichs bewegen, diese Einschränkung kann leicht mittels Software pro grammiert werden.The results resulting from the chassis model are usefully a statistical treatment, in particular averaging and control of the standard deviation to suppress short-term outliers. After that, the results for generating Notes and warning messages to the driver are used, in the drawing this is due to the Display D1 symbolizes the simultaneous setpoint and actual value of the tire air pressure be transferred. The suggested tire air pressure should only change within one drive move the specific range of values, this limitation can easily be changed using software pro be grammed.
Als Warnmeldungen bieten sich insbesondere Hinweise zur Reduzierung der Höchstgeschwindig keit bei drohender Strukturüberlastung des Reifens infolge hoher Walkleistung oder übermäßiger Belastung an, daneben sind Aquaplaningwarnungen bei an der Verschleißgrenze befindlichen. Reifen sowie Wechselhinweise zu den Reifen denkbar. Ebenso könnte die erwartete Restlebens dauer angezeigt werden und ein Hinweis bei einer Fahrweise gegeben werden, die die Gefahr einer Vergeringerung der Reifenlebensdauer birgt.As warning messages there are in particular instructions for reducing the maximum speed speed in the event of an impending structural overload of the tire due to high flexing performance or excessive Load on, next to it are aquaplaning warnings for those at the wear limit. Tires and changing instructions for the tires are conceivable. Likewise, the expected remaining life are displayed and a note is given for a driving style that presents the risk of a A reduction in tire life harbors.
Dazu kann auch die Information von Gierraten- und Beschleunigungssensoren zur weiteren Erken nung der Ursache der Erwärmung der Lauffläche besonders vorteilhaft sein, besonders um ein Driften des Fahrzeugs quer zur Laufrichtung zu erkennen. Der Außenluftdruck kann dabei ebenso wie die Außentemperatur zur Korrektur der gemessenen Größen nach dem Gasgesetz herangezogen werden. Daneben bietet sich auch an, einen Betrieb des Fahrzeugs im Hochgebirge ebenfalls anhand des Außenluftdrucks zu erkennen und im Fahrwerksmodell, insbesondere bei zudem niedriger Außentemperatur, beispielsweise durch höhere Gewichtung der Traktion zu berücksichtigen.This can also include information from yaw rate and acceleration sensors for further detection The cause of the warming of the tread may be particularly advantageous, especially around a Detect drift of the vehicle transverse to the direction of travel. The outside air pressure can also how the outside temperature is used to correct the measured values according to the gas law become. In addition, it also makes sense to also operate the vehicle in the high mountains based on the outside air pressure and in the chassis model, especially when it is lower Outside temperature, for example by taking the traction into account.
Die Messwerte der Sensoren stehen häufig auf einem Fahrzeugdatenbus, insbesondere CAN-Bus zur Verfügung, ebenso kann der vorgeschlagene Reifenluftdruck und ein eventuell vorliegender Warnhinweis mit dem CAN-Bus zur Anzeige auf dem Armaturenbrett (Instrumententräger) sicher übermittelt werden.The measured values of the sensors are often on a vehicle data bus, in particular CAN bus available, as well as the proposed tire air pressure and a possibly existing one Warning with the CAN bus for display on the dashboard (instrument panel) safely be transmitted.
Claims (17)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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DE2000107558 DE10007558A1 (en) | 2000-02-18 | 2000-02-18 | Device or system for detecting optimum tire inflation pressure has evaluation unit for assessing tire pressure sensor and further sensor measurement values |
PCT/EP2001/001741 WO2001060644A1 (en) | 2000-02-18 | 2001-02-16 | System for detecting the optimum tyre inflation pressure |
Applications Claiming Priority (1)
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DE2000107558 DE10007558A1 (en) | 2000-02-18 | 2000-02-18 | Device or system for detecting optimum tire inflation pressure has evaluation unit for assessing tire pressure sensor and further sensor measurement values |
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DE10007558A1 true DE10007558A1 (en) | 2001-08-30 |
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DE2000107558 Withdrawn DE10007558A1 (en) | 2000-02-18 | 2000-02-18 | Device or system for detecting optimum tire inflation pressure has evaluation unit for assessing tire pressure sensor and further sensor measurement values |
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WO (1) | WO2001060644A1 (en) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
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DE10144326A1 (en) * | 2001-09-10 | 2003-04-03 | Siemens Ag | Method and system for monitoring tire pressure |
WO2003080371A2 (en) * | 2002-03-25 | 2003-10-02 | Infineon Technologies Ag | Tyre pressure monitoring system |
WO2003091046A1 (en) * | 2002-04-26 | 2003-11-06 | TÜV Automotive GmbH | Method for monitoring a vehicle tire and a vehicle, and method for generating a vehicle tire interaction model, vehicle diagnostic system |
DE10250942A1 (en) * | 2002-10-31 | 2004-05-19 | Infineon Technologies Ag | Tire position determination method for identifying the position of one motor vehicle tire amongst a number of tires, whereby the position is determined from an evaluation of vehicle driving state and pressure sensor signals |
DE10349003A1 (en) * | 2003-10-17 | 2005-05-19 | Volkswagen Ag | Method and device for electronic tire pressure monitoring |
DE102004051197A1 (en) * | 2004-10-21 | 2006-04-27 | Daimlerchrysler Ag | Tire`s temperature monitoring method for e.g. tractor, involves determining current tire temperature-actual value based on currently acquired tire pressure-actual value under consideration of isochore system, which is accepted for tire |
DE102010049090A1 (en) * | 2010-10-21 | 2012-04-26 | Gm Global Technology Operations Llc (N.D.Ges.D. Staates Delaware) | Method for automatic tire pressure control for vehicle, involves determining actual value for tire pressure for reference temperature |
DE102010052916A1 (en) * | 2010-11-30 | 2012-05-31 | Carbofibretec Gmbh | Illuminated readout for use at wheel of bicycle, has hub assembly arranged at hub attachment of hub of wheel, where hub assembly is electrically connected to spoke arrangement that is connected to power supply |
DE10390806B4 (en) * | 2002-03-01 | 2014-07-17 | Continental Teves Ag & Co. Ohg | Method for temperature compensation in a tire pressure monitoring system |
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ES2276941T3 (en) * | 2002-03-28 | 2007-07-01 | Pirelli Tyre S.P.A. | PROCEDURE AND SYSTEM FOR MONITORING THE BEHAVIOR OF A TIRE DURING THE CIRCULATION OF A MOTOR VEHICLE. |
MX2019003964A (en) * | 2016-10-05 | 2019-08-12 | Solera Holdings Inc | Vehicle tire monitoring systems and methods. |
DE102018216257A1 (en) | 2018-09-24 | 2020-03-26 | Volkswagen Aktiengesellschaft | Procedure for emergency response to a loss of tire pressure, and vehicle |
US11858299B2 (en) | 2019-03-20 | 2024-01-02 | Bridgestone Americas Tire Operations, Llc | Effective tire pressure sensing system and method |
US11571936B1 (en) | 2019-05-13 | 2023-02-07 | Unicus Innovations Llc | Self contained tire inflator |
US11001109B1 (en) | 2019-05-13 | 2021-05-11 | Unicus Innovations Llc | Tire stem having breather |
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Cited By (16)
Publication number | Priority date | Publication date | Assignee | Title |
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DE10144326A1 (en) * | 2001-09-10 | 2003-04-03 | Siemens Ag | Method and system for monitoring tire pressure |
DE10144326B4 (en) * | 2001-09-10 | 2005-09-22 | Siemens Ag | Method and system for monitoring a tire air pressure |
DE10390806B4 (en) * | 2002-03-01 | 2014-07-17 | Continental Teves Ag & Co. Ohg | Method for temperature compensation in a tire pressure monitoring system |
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WO2003080371A2 (en) * | 2002-03-25 | 2003-10-02 | Infineon Technologies Ag | Tyre pressure monitoring system |
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WO2003091046A1 (en) * | 2002-04-26 | 2003-11-06 | TÜV Automotive GmbH | Method for monitoring a vehicle tire and a vehicle, and method for generating a vehicle tire interaction model, vehicle diagnostic system |
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DE10250942A1 (en) * | 2002-10-31 | 2004-05-19 | Infineon Technologies Ag | Tire position determination method for identifying the position of one motor vehicle tire amongst a number of tires, whereby the position is determined from an evaluation of vehicle driving state and pressure sensor signals |
DE10349003A1 (en) * | 2003-10-17 | 2005-05-19 | Volkswagen Ag | Method and device for electronic tire pressure monitoring |
DE102004051197A1 (en) * | 2004-10-21 | 2006-04-27 | Daimlerchrysler Ag | Tire`s temperature monitoring method for e.g. tractor, involves determining current tire temperature-actual value based on currently acquired tire pressure-actual value under consideration of isochore system, which is accepted for tire |
DE102010049090A1 (en) * | 2010-10-21 | 2012-04-26 | Gm Global Technology Operations Llc (N.D.Ges.D. Staates Delaware) | Method for automatic tire pressure control for vehicle, involves determining actual value for tire pressure for reference temperature |
DE102010052916A1 (en) * | 2010-11-30 | 2012-05-31 | Carbofibretec Gmbh | Illuminated readout for use at wheel of bicycle, has hub assembly arranged at hub attachment of hub of wheel, where hub assembly is electrically connected to spoke arrangement that is connected to power supply |
DE102010052916B4 (en) * | 2010-11-30 | 2016-09-15 | Carbofibretec Gmbh | Impeller of a bicycle with strain gauges and / or LED display as well as bicycle |
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