Method for regulating a tyre inflating device
5 claims: 5 independent, 0 dependent
- 1A method of regulating a tyre filling device (3) having presetting facility for the desired tyre pressure, in which an electronic control device (2) actuates a closure valve (4) for automatically changing the quantity of air in a tyre (1) and this change takes place intermittently, in that air is fed in or removed in individual steps and, after a subsequent comparison on each occasion of the new actual pressure with the preset theoretical pressure, a decision is made as to whether the intermittent air feed is to be continued or, because the theoretical pressure has been reached, the filling operation is to be terminated, characterized in that, after a first filling or discharging operation, carried out with a fixed, predetermined time interval, the time interval for the next filling or discharge operation is so determined and set by a comparison of the measured actual pressure change with the total pressure change necessary for reaching the theoretical pressure that the theoretical pressure ought thereby theoretically to be reached with this next filling or discharge operation and that, if it is not reached, the time intervals for necessary further filling or discharge operations are determined and set in the same manner each time using the values for the time and pressure change of the preceding filling or discharge operation, until the theoretical pressure value has been reached to a predetermined accuracy. 1. Procédé de réglage d'un appareil (3) de gonflage de pneumatiques, avec possibilité de détermination à l'avance de la pression voulue pour le pneumatique, procédé dans lequel un dispositif (2) électronique de réglage actionne une valve (4) d'arrêt pour modifier automatiquement la quantité d'air se trouvant dans un pneumatique (1), et cette modification a lieu progressivement par étapes, du fait qu'à chaque fois, dans les diverses étapes, on introduit de l'air ou on laisse partir de l'air et selon la comparaison immédiatement effectuée à chaque fois ensuite de la nouvelle pression réelle avec la pression de consigne réglée au préalable, il est décidé s'il faut poursuivre l'apport d'air par étapes ou si, parce que la pression de consigne est atteinte, il faut arrêter l'opération de gonflage, procédé caractérisé en ce qu'après une première opération de gonflage ou de départ d'air, effectuée avec un intervalle de temps fixe donné à l'avance, on détermine et règle les intervalles de temps pour l'opération suivante de gonflage ou de départ d'air, en comparant la modification de pression mesurée en fait avec la modification de pression nécessaire au total pour atteindre la pression de consigne, de manière à devoir ainsi atteindre théoriquement déjà à l'aide de cette opération suivante de gonflage ou de départ d'air la pression de consigne et caractérisé en ce que, si elle n'est pas atteinte, on détermine et règle à chaque fois de la même façon les intervalles de temps nécessaires pour d'autres opérations de gonflage ou de départ d'air, en utilisant les valeurs de variation de temps et de pression de l'opération à chaque fois précédente de gonflage ou de départ d'air, jusqu'à atteindre, avec une précision donnée à l'avance, la valeur de la pression de consigne. 1. Verfahren zur Regelung eines Reifenfüllgerätes (3) mit Voreinstellbarkeit des gewünschten Reifendruckes, bei dem eine elektronische Regeleinrichtung (2) ein Verschlußventil (4) zur automatischen Veränderung der Luftmenge in einem Reifen (1) betätigt und diese Veränderung schrittweise erfolgt, indem jeweils in einzelnen Schritten Luft zu- oder abgeführt wird und nach jeweils anschließendem Vergleich des neuen Ist-Druckes mit dem voreingestellten Soll-Druck entschieden wird, ob die schrittweise Luftzufuhr fortzusetzen ist oder wegen Erreichens des Soll-Druckes der Füllvorgang abzuschließen ist, dadurch gekennzeichnet, daß nach einem ersten mit einem fest vorgegebenen Zeitintervall erfolgten Füll- oder Ablaßvorgang das Zeitintervall für den nächsten Füll- oder Ablaßvorgang durch Vergleich der gemessenen tatsächlichen Druckveränderung mit der insgesamt zur Erreichung des Solldruckes erforderlichen Druckveränderung so ermittelt und eingestellt wird, daß damit der Solldruck theoretisch bereits mit diesem nächsten Füll- oder Ablaßvorgang erreicht sein müßte und daß bei Nichterreichung die Zeitintervalle notwendiger weiterer Füll- oder Ablaßvorgänge in jeweils gleicher Weise unter Verwendung der Zeit- und Druckveränderungswerte des jeweils vorausgegangenen Füll- oder Ablaßvorganges ermittelt und eingestellt werden, bis der Solldruckwert mit einer vorgegebenen Genauigkeit erreicht ist.
- 2A control method according to Claim 1, characterized in that, as safety measure it is provided that in the control device the control signals for opening the closure valve (4), which without signals is closed, pass through a retriggerable mono flop (13), which transmits these signals onwards only so long as it is activated by pulses initiated at predeterminable time intervals for the relevant time intervals. 2. Procédé de réglage selon la revendication 1, caractérisé en ce qu'on prévoit comme mesure de sécurité le fait que, dans le dispositif de réglage, les signaux de commande destinés à ouvrir une valve (4) d'arrêt, qui, sans les signaux, est fermée, parcourent une bascule monostable (13) redéclenchable;en ce que cette bascule n'est conductrice que tant qu'elle est à chaque fois activée, pendant les intervalles de temps correspondants, par des impulsions introduites en des intervalles prédéterminés de temps. 2. Regelverfahren nach Anspruch 1, dadurch gekennzeichnet, daß als Sicherheitsmaßnahme vorgesehen ist, daß in der Regeleinrichtung die Steuersignale zum Öffnen des ohne Signale geschlossenen Verschlußventils (4) ein retriggerbares Monoflop (13) durchlaufen, das diese nur weiterleitet, solange es durch in vorbestimmbaren Zeitabständen eingeleitete Impulse für die betreffenden Zeitabstände jeweils aktiviert ist.
- 3A control method according to Claim 1, possibly also in combination with claim 2, characterized in that, as safety measure it is provided that the control device (2), in the case where it has not recorded any pressure change after the first filling operation, indicates this and/or puts the tyre filling device (3) out of operation. 3. Procédé de réglage selon la revendication 1, prise éventuellement en combinaison avec la revendication 2, caractérisé en ce que l'on prévoit comme mesure de sécurité le fait qu'au cas où, après la première opération de gonflage, le dispositif (2) de réglage n'enregistre pas de variations de pression, ce dispositif affiche ce renseignement et/ou met hors service l'appareil (3) de gonflage de pneumatiques. 3. Regelverfahren nach Anspruch 1, ggf. auch in Kombination mit Anspruch 2, dadurch gekennzeichnet daß als Sicherheitsmaßnahme vorgesehen ist, daß die Regeleinrichtung (2) für den Fall, daß sie nach dem ersten Füllvorgang keine Druckänderung registriert, dies anzeigt und/oder das Reifenfüllgerät (3) außer Betrieb setzt.
- 4A control method according to Claim 3, characterized in that, as safety measure it is provided that the display and/or the putting out of operation of the tyre filling device (3) takes place when the recorded pressure change in the control device (2) after the second filling operation is not at least between 50 and 80 % of that value which is necessary for reaching the theoretical pressure in the tyre. 4. Procédé de réglage selon la revendication 3, caractérisé en ce qu'on prévoit, comme mesure de sécurité, le fait que l'affichage et/ou la mise hors service de l'appareil (3) de gonflage de pneumatique se produit lorsqu'après la seconde opération de gonflage, la modification de pression enregistrée dans le dispositif (2) de réglage ne représente pas au moins une valeur comprise entre 50 et 80 % de la valeur nécessaire pour l'obtention de la pression de consigne dans le pneumatique. 4. Regelverfahren nach Anspruch 3, dadurch gekennzeichnet, daß als Sicherheitsmaßnahme vorgesehen ist, daß die Anzeige und/oder das Außerbetriebsetzen des Reifenfüllgerätes (3) erfolgt, wenn die registrierte Druckänderung in der Regeleinrichtung (2) nach dem zweiten Füllvorgang nicht mindestens zwischen 50 bis 80 % des Wertes ist, der zur Erreichung des Soll- Druckes im Reifen erforderlich ist.
- 5A control method according to one of the preceding Claims, characterized in that, as safety measure it is provided that a projection is made from the pressure change measured in the first filling operation of the volume of the tyre (1) to be filled, and the tyre filling device (3) is put out of operation if the preset pressure is higher than an upper pressure limiting value predetermined for the projected volume. 5. Procédé de réglage selon l'une des revendications précédentes, caractérisé en ce qu'on prévoit, comme mesure de sécurité, à partir de la variation de pression mesurée au cours de la première opération de gonflage, une extrapolation au volume du pneumatique (1) à gonfler et l'on met hors service l'appareil (3) de gonflage de pneumatiques lorsque la pression établie à l'avance est supérieure à une valeur limite supérieure de pression, déterminée à l'avance pour le volume pour lequel l'extrapolation a lieu. 5. Regelverfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, das als Sicherheitsmaßnahme vorgesehen ist, daß aus der bei dem ersten Füllvorgang gemessenen Druckänderung auf das Volumen des zu befüllenden Reifens (1) hochgerechnet wird und das Reifenfüllgerät (3) außer Betrieb gesetzt wird, wenn der voreingestellte Druck höher liegt als ein für das hochgerechnete Volumen vorbestimmter oberer Druckgrenzwert
Independent claims5
21 paragraphs, as filed
The invention relates to a method according to the preamble of patent claim 1.
Such a method is known from EP-A-0 019463. With this method, the air is supplied step by step in constant predetermined time steps until the desired target pressure in the tire is reached. With this method, it may take a relatively long time for the desired pressure in the tire to be inflated to be reached.
Proceeding from this, the object of the invention is to create a control method in which the time required to fill the tire can be significantly reduced. The aim is to get by with about 2 - 3 filling processes if possible. This object is achieved by a control method with the features of claim 1.
According to this teaching, a so-called test filling process is carried out in a first step and then by comparing the measured pressure increase in the tire with the total pressure increase required, the time interval for the following filling process is determined in such a way that the target pressure should theoretically be reached with the second filling process. In the event that the target pressure should in reality not yet be reached with the second or further filling processes, the next filling process is carried out according to the same principle, but with the initial values after the previous filling process.
Appropriate security measures for the control method according to the invention are the subject of the dependent claims.
The safety measure according to claim 2 is about the fact that overfilling of the tire is excluded in the event of a failure of the control device. This is brought about by a retriggerable monoflop, which only allows the closed closure valve at the outlet of the tire inflation device to be opened if it is constantly excited by pulses at predetermined intervals. The time intervals can be set arbitrarily, e.g. B. for one to two seconds.
The safety measure according to claim 3 is intended to avoid the fact that when the tire actually enters the tire from the tire inflation device, if this is not registered due to a defect in the pressure value recording or transmission by the control device, the tire is overfilled.
According to claim 4, this safety measure is further refined in that the tire inflation device is also put out of operation if, in the second inflation process, in which the desired target pressure is to be approximately achieved, a pressure change of at least not amount to at least from the control device 50 - 80% of the value is registered, which would be computationally necessary to reach the target pressure.
The measure according to claim 5 provides that in the event of an inadvertently preselected target pressure at a smaller tire not suitable for such pressures, such as, for. B. bicycle tires, the tire inflation device is also put out of operation.
In the case of the safety measures described above, it may also be sufficient in some cases that a warning indicator first appears instead of the tire inflation device being taken out of service.
An embodiment of the invention is shown in the drawing.
Show it:<ul id="ul0001" list-style="none"><li>1 shows the schematic structure of the device required for carrying out the control method;</li><li>Fig. 2 is a diagram for the geometric representation of the mathematical law of education to determine the time intervals of the tire inflation processes.</li></ul>
1 shows the tire as a controlled system and 2 shows a control device designed as a programmed microprocessor. The tire inflation device 3 is connected to the tire 1 via a closure valve 4 equipped with solenoid valves. The air pressure 5 from a compressed air supply container is applied to the tire inflation device 3. The actual pressure 6 present in the tire 1 is detected by a measuring means 7 and converted into a digital actual value signal of the control device as a variable 8. The actual value on the tire inflation device 3 can also be fed to an actual value display 10 via a line 9. The desired target tire pressure 11 is entered via a target value input device 12 of the control device 2 in addition to the actual tire pressure 6 (size 8).
When the tire inflation device 3 is started up after connection to the tire 1, a first filling process is initiated by the control device 2 by a start signal to be triggered by the operator, while the values for the actual tire pressure 6 and the target pressure 11 are simultaneously from the control device 2 be included. The period for the first filling process is in the control device 2 with A t<sub>O</sub> = const permanently stored. For A t<sub>O</sub> can e.g. B. a value of 500 ms can be specified. The control device 2 determines the time intervals for the following filling processes according to the teaching specified in the characterizing part of patent claim 1. For this purpose, the following educational law has been entered into the control device as a computer program:<maths id="math0001" num=""><img file="EP0133482B1_D0001.tif" /></maths>
The diagram in FIG. 2 illustrates the control steps resulting from the application of the programmed education law, in which the tire pressure p is plotted over the filling time t. The point A at (i-1) indicates the initial condition of the tire after the tire inflator has been connected. The first filling process, a so-called trial shot, takes place in a predetermined time interval t<sub>O</sub> = const. It causes an increase in pressure in the tire to point B with the coordinates i. For the second filling process, the control device now uses the law of education to determine the time interval at which the theoretical pressure should theoretically have already been reached with this filling process given a constant increase in pressure per unit of time. This results in the following time interval:
<maths id="math0002" num=""><img file="EP0133482B1_D0002.tif" /></maths>
In the event that the pressure is actually at the value C with the ordinate p<sub>should</sub> the tire is completed. However, after Δt this is not actually the case, but rather only the lower one<sub>PsolI</sub> If point D is reached, the following new time interval is determined and set for the next filling process:<maths id="math0003" num=""><img file="EP0133482B1_D0003.tif" /></maths>
After the following third filling process carried out with this time interval, the pressure value then measured now has the target pressure value <sub>PsolI</sub> reached, the tire is again filled. If the target pressure is still not reached, further filling processes are carried out according to the described pattern until the target pressure is finally reached. As a rule, however, the target tire pressure is reached after about 2 - 3 filling operations within the specified accuracy. As a tolerance range z. B. a tolerance of +/- 0.5% of the max. adjustable target pressure can be specified. The particular advantage of the method according to the invention consists in being able to determine in advance the total filling time theoretically required per filling time unit with constant pressure increase and to be able to set it for the next filling process. This makes it possible to get by with a minimum of filling processes, which in turn means very quick filling.
The education law described above only applies if the feed pressure is kept constant. If the feed pressure is not constant, as is the case when emptying a relatively small storage container without using a reducing valve, other, non-linear educational laws apply. However, the control procedure is basically the same.
Only the case is described above in which a tire to be inflated has too little pressure and must therefore be inflated. The control procedure naturally also applies to cases in which tires are to be brought from a high actual pressure to a lower target pressure. In these cases, the first filling process is simply replaced by a first draining process with a predetermined time interval. The following drainage processes are determined by the programmed education law in an analogous way to filling. The only difference is that fill and drain times are not set and set.
The retriggerable monoflop according to claim 2 is entered in Fig. 1 of the drawing under the reference number 13.
5 sheets
Sheet 1 Sheet 2 Sheet 3 Sheet 4 Sheet 5
5 members in 3 offices
Priority claims4
| Document | Office | Kind | Date |
|---|---|---|---|
| 3328280 | Germany | A | |
| 3328280 | Germany | – | |
| 3328280 | – | – | – |
| DE19833328280 | – | – | – |
Members5
| Document | Office | Kind | |
|---|---|---|---|
| DE3328280C1 | Germany | C1 | |
| EP0133482A2 | European Patent Office (EPO) | A2 | |
| EP0133482A3 | European Patent Office (EPO) | A3 | |
| EP0133482B1This record | European Patent Office (EPO) | B1 | |
| AT43540T | Austria | T |
26 legal events, as 2 offices reported them to INPADOC
Over the term
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| Event | Code | Office | |
|---|---|---|---|
| Notification of lapseLapsedST | ST | FR | |
| Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25 | PG25 | EP | |
| Se: european patent has lapsedLapsedEUG | EUG | EP | |
| Gb: european patent ceased through non-payment of renewal feeCeasedGBPC | GBPC | EP | |
| Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25 | PG25 | EP | |
| Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25 | PG25 | EP | |
| Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25 | PG25 | EP | |
| Annual fee paid to national office [announced via postgrant information from national office to epo]GrantedPGFP | PGFP | EP | |
| Annual fee paid to national office [announced via postgrant information from national office to epo]GrantedPGFP | PGFP | EP | |
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| Annual fee paid to national office [announced via postgrant information from national office to epo]GrantedPGFP | PGFP | EP | |
| Se: european patent in force in swedenEAL | EAL | EP | |
| No opposition filedOpposition26N | 26N | EP | |
| No opposition filed within time limitOppositionORIGINAL CODE: 0009261PLBE | PLBE | EP | |
| Information on the status of an ep patent application or granted ep patentGrantedSTATUS: NO OPPOSITION FILED WITHIN TIME LIMITSTAA | STAA | EP | |
| Fr: translation filedET | ET | EP | |
| Gb: translation of ep patent filed (gb section 77(6)(a)/1977)GBT | GBT | EP | |
| Designated contracting statesAK | AK | EP | |
| Corresponds to:REF | REF | EP | |
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| Public reference made under article 153(3) epc to a published international application that has entered the european phaseORIGINAL CODE: 0009012PUAI | PUAI | EP |
Numbers
- Publication
- 0133482
- Publication, DOCDB
- 0133482
- Publication, EPODOC
- EP0133482
- Application
- 84108123
- Application, DOCDB
- 84108123
- Application, EPODOC
- EP19840108123
Titles3
- English
- Method for regulating a tyre inflating device
- German
- Verfahren zur Regelung eines Reifenfüllgerätes
- French
- Méthode de réglage d'un dispositif de gonflage pour pneumatiques
Classification
- CPC, 1
- B60S5/046
- IPC, 2
- B60C23 00
- B60S5 04
Designated states4
- Contracting states, 4
- Austria
- France
- United Kingdom
- Sweden
