FR2499913A1 - Vehicle tyre pressure regulation equipment - comprises control valve on wheel having valve plug comprising piston and rolling membrane spring-loaded shut - Google Patents
Vehicle tyre pressure regulation equipment - comprises control valve on wheel having valve plug comprising piston and rolling membrane spring-loaded shut Download PDFInfo
- Publication number
- FR2499913A1 FR2499913A1 FR8202689A FR8202689A FR2499913A1 FR 2499913 A1 FR2499913 A1 FR 2499913A1 FR 8202689 A FR8202689 A FR 8202689A FR 8202689 A FR8202689 A FR 8202689A FR 2499913 A1 FR2499913 A1 FR 2499913A1
- Authority
- FR
- France
- Prior art keywords
- control valve
- valve
- pressure
- tire pressure
- wheel
- 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.)
- Granted
Links
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
- B60C23/0491—Constructional details of means for attaching the control device
- B60C23/0496—Valve stem attachments positioned outside of the tyre chamber
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Safety Valves (AREA)
- Check Valves (AREA)
- Control Of Fluid Pressure (AREA)
Abstract
Description
L'invention part d'une installation de réglage de la pression de pneu pour véhicules automobiles, permettant de changer
la pression pendant la marche, comprenant une soupape de commande de pression de pneu disposée sur la roue ou sur chaque roue de véhicule dont la pression de pneu doit pouvoir être réglée, qui est normalement fermée mais qui est ouverte par la pression envoyée lorsque le conducteur déclenche un changement de pression.The invention starts from a tire pressure adjustment installation for motor vehicles, making it possible to change
pressure during travel, comprising a tire pressure control valve disposed on the wheel or on each vehicle wheel whose tire pressure must be adjustable, which is normally closed but which is opened by the pressure sent when the driver triggers a pressure change.
Une telle installation est connue (DE-AS 27 36 603). Such an installation is known (DE-AS 27 36 603).
Les installations de réglage connues de ce type posent le problème que la soupape de commande de pression de pneu disposée sur la roue doit être ouverte aussi bien pendant le gonflement du pneumatique que pendant l'abaissement de la pression de pneu et que cette soupape ne doit pouvoir se fermer que lorsque la pression dans la conduite d'alimentation descend au-dessous d'une valeur d'environ 1 bar. Habituellement, c'est-à-dire lorsqu'il n'y a ni gonflement ni abaissement de la pression, la conduite d'alimentation est alors mise a l'échappement, pour que soient détendus les dispositifs à rotor formant les liaisons rotatives avec les roues dans la conduite d'alimentation, afin que ces dispositifs occasionnent le moins de frottement possible. Known control installations of this type pose the problem that the tire pressure control valve disposed on the wheel must be open both during inflation of the tire and during the lowering of the tire pressure and that this valve must not able to close only when the pressure in the supply line drops below a value of approximately 1 bar. Usually, that is to say when there is neither swelling nor lowering of the pressure, the supply line is then exhausted, so that the rotor devices forming the rotary connections are relaxed. the wheels in the supply line, so that these devices cause the least possible friction.
Par la demande de brevet allemand DE-OS 26 30 511, on connait déjà une soupape de commande de pression de pneu, réalisée sous forme d'une soupape à tiroir, laquelle est cependant coûteuse, compliquée, encombrante et lourde. Comme elle est montée en un point excentré sur le pneu, son poids produit un balourd considérable qui affecte la qualité de marche du pneumatique. Cette soupape possède en putre une grande hystérésis et elle est sensible aux encrassements par les produits d'abrasion du pneu. By German patent application DE-OS 26 30 511, there is already known a tire pressure control valve, produced in the form of a slide valve, which is however expensive, complicated, bulky and heavy. As it is mounted at an eccentric point on the tire, its weight produces a considerable imbalance which affects the running quality of the tire. This valve has a great hysteresis in putre and it is sensitive to fouling by the abrasion products of the tire.
Selon une caractéristique essentielle de l'invention, ayant pour but d'éliminer les inconvénients mentionnés ci-dessus, la soupape de commande possède un siège de soupape solidaire du corps de soupape, avec lequel coopère un clapet disposé sur l'élément formant piston, sur lequel la pression de pneu envoyée agit dans le sens de
l'ouverture de la soupape de commande et sur lequel la force d'un
ressort agit dans le sens contraire. According to an essential characteristic of the invention, the aim of which is to eliminate the drawbacks mentioned above, the control valve has a valve seat integral with the valve body, with which a valve arranged on the piston element cooperates, on which the tire pressure sent acts in the direction of
the opening of the control valve and on which the force of a
spring acts in the opposite direction.
On obtient ainsi l'avantage qe la soupape de commande réagit rapidemen[, que sa construction est simple et qu'elle peut par conséquent être fabriquée économiquement. De plus, elle est compacte et maniable et n'a qu' faible poids. En raison de sa faible masse, elle n'ai ère pas la qalic de marce du pneumatique. This gives the advantage that the control valve reacts quickly, that its construction is simple and that it can therefore be manufactured economically. In addition, it is compact and handy and has only low weight. Because of its low mass, it does not have the quality of the tire.
Selon un perfectionnement avantageux > lorgane de distribution formé du siège et: du clapet est suivi directement d'un point d'étranglement. Un tel point d'étranglement a pour but de permettre l'écoulement par la soupape de commande de l'air refluant du pneu lors d'un abaissement de sa pression, en évitant la fermeture préina- turée de la soupape.Le point d'étranglement est réalise sous forme d'un seul étranglement fixe ou de plusieurs étranglements fixes disposés l'un derrière l'autre. Comme il se produit une forte chute de pression sur le point d'étranglement a la mise a l'échappement de la conduite d'alimentation, il est avantageux que la soupape de commande est ainsi amenee de façon sûre à sa position de fermeture. According to an advantageous improvement> the distribution member formed by the seat and: the valve is directly followed by a choke point. The purpose of such a throttling point is to allow the flow through the control valve of the air flowing back from the tire when its pressure is lowered, by avoiding the premature closing of the valve. constriction is carried out in the form of a single fixed constriction or of several fixed constrictions arranged one behind the other. As there is a strong pressure drop on the throttling point when the supply line is exhausted, it is advantageous that the control valve is thus safely brought to its closed position.
Selon une autre caractéristique de l'invention, la face exposée à la pression de pneu de l'élément formant piston et le ressort agissant en sens contraire de cette pression sont mutuellement accordds de telle manière que la soupape de commande, à 1-^. According to another characteristic of the invention, the face exposed to the tire pressure of the piston element and the spring acting in the opposite direction to this pressure are mutually tuned so that the control valve, at 1- ^.
mise à l'échappement de la conduite d'alimentation, est fermée audessous d'une pression de pneu minimale admissible.exhaust from the supply line, is closed below a minimum permissible tire pressure.
D'autres caractéristiques et avantages de l'invention ressortiront plus clairement de la description qui va suivre d'un exemple de réalisation non limitatif, ainsi que la figure unique du dessin annexé, qui est une coupe axiale d'une soupape de commande de pression de pneu selon l'invention. Other characteristics and advantages of the invention will emerge more clearly from the description which follows of a nonlimiting exemplary embodiment, as well as the single figure of the appended drawing, which is an axial section of a pressure control valve. tire according to the invention.
La soupape représenté possède un corps 1 en deux par- ties : un couvercle 2 et un fond 3 Un diaphragme 4 est serré par son bord extérieur S entre les faces de joint du fond 3 et du couvercle 2. The valve shown has a body 1 in two parts: a cover 2 and a bottom 3 A diaphragm 4 is clamped by its outer edge S between the seal faces of the bottom 3 and of the cover 2.
Le diaphragme 4 est assemblé avec une cuvette de ressort 6 de manière à constituer un élément formant piston 7. Le disphragme 4 possède une partie annulaire roulante 8 et porte en son centre le clapet: 9 de la soupape de commande > qui est formé sur le diaphragme.The diaphragm 4 is assembled with a spring cup 6 so as to constitute a piston-forming element 7. The disphragm 4 has a rolling annular part 8 and carries in its center the valve: 9 of the control valve> which is formed on the diaphragm.
Une chambre de respiration il, communiquant à travers un filtre 10 avec l'air extérieur, est formée entre la cuvette de ressort 6 et le couvercle 2. Cette chambre contient un ressort 12 qui a tendance à presser l'élément 7, formant piston à diaphragme, par le clapet 9 contre un siège 13 solidaire du corps de la soupape. Ce siège est situe dans une chambre de travail 20 et est formé sur le fond 3, lequel présente également un orifice fileté d'entrée 14 et, sur le même axe, un orifice fileté de sortie 15 pour le raccordement de la soupape. Le couvercle 2 possède intérieurement un épaulement 16, contre lequel peut venir s'appliquer le bord supérieur 17 de la cuvette de ressort 6 pour limiter la course d'ouverture. A breathing chamber il, communicating through a filter 10 with the outside air, is formed between the spring bowl 6 and the cover 2. This chamber contains a spring 12 which tends to press the element 7, forming a piston at diaphragm, by the valve 9 against a seat 13 secured to the body of the valve. This seat is located in a working chamber 20 and is formed on the bottom 3, which also has a threaded inlet orifice 14 and, on the same axis, a threaded outlet orifice 15 for the connection of the valve. The cover 2 has internally a shoulder 16, against which the upper edge 17 of the spring cup 6 can be applied to limit the opening stroke.
Un prolongement intérieur de l'orifice de sortie 15 contient, l'un derrière l'autre, deux étranglements 18 et 19, dont celui (18) situé du côté de l'organe de distribution 9/13 possède une plus grande section de passage que l'autre (19). An internal extension of the outlet orifice 15 contains, one behind the other, two throttles 18 and 19, of which that (18) situated on the side of the dispensing member 9/13 has a larger passage section than the other (19).
Sur l'orifice d'entrée 14 est branchée une conduite d'alimentation 21 et de l'orifice de sortie 15 part une conduite 22 menant au pneumatique. On the inlet orifice 14 is connected a supply line 21 and from the outlet orifice 15 leaves a line 22 leading to the tire.
Fonctionnement
La soupape de commande de pression de pneu est normalement fermée. Si la pression dans les pneus doit être abaissée ou augmentée, le système envoie tout d'abord, par la conduite d'alimentation 21, une élévation de pression de 0 bar la nouvelle pression de pneu désirée. La soupape de commande s'ouvre au moment où la pression croissante dépasse 1 bar. Ensuite, de l'air comprimé traversant la soupape de commande peut pénétrer dans le pneu ou en sortir, suivant que le pneu doit être gonfle davantage ou au contraire dégonflé.Operation
The tire pressure control valve is normally closed. If the pressure in the tires has to be lowered or increased, the system first sends, via the supply line 21, a pressure rise of 0 bar to the new desired tire pressure. The control valve opens when the increasing pressure exceeds 1 bar. Then, compressed air passing through the control valve can enter or exit the tire, depending on whether the tire needs to be further inflated or, on the contrary, deflated.
Lorsque le pneu a atteint sa pression de consigne, la conduite d'alimentation 21 est brusquement mise à l'échappement ; sur les étranglements 18 et 19 se produit alors une forte chute de pression, de sorte que l'élément 7 formant piston à diaphragme coupe la communication par son clapet 9 et ferme ainsi le pneumatique. La disposition en série des deux étranglements 18 et 19 produit une fermeture sare parce que, dans le cas extrême, le rapport de pression critique règne sur chaque étranglement, produisant l'étranglement d'une
pression de pneu élevée afin que l'organe de distribution 9/13 soit
ferme de façon sûre. When the tire has reached its set pressure, the supply line 21 is suddenly exhausted; on the throttles 18 and 19 a strong pressure drop then occurs, so that the element 7 forming a diaphragm piston cuts the communication by its valve 9 and thus closes the tire. The serial arrangement of the two constrictions 18 and 19 produces a sare closure because, in the extreme case, the critical pressure ratio prevails over each constriction, producing the constriction of a
high tire pressure so that the distributor 9/13 is
securely closes.
Claims (5)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19818104435U DE8104435U1 (en) | 1981-02-18 | 1981-02-18 | TIRE PRESSURE CONTROL SYSTEM |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2499913A1 true FR2499913A1 (en) | 1982-08-20 |
FR2499913B1 FR2499913B1 (en) | 1985-02-15 |
Family
ID=6724774
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR8202689A Granted FR2499913A1 (en) | 1981-02-18 | 1982-02-18 | Vehicle tyre pressure regulation equipment - comprises control valve on wheel having valve plug comprising piston and rolling membrane spring-loaded shut |
Country Status (3)
Country | Link |
---|---|
DE (1) | DE8104435U1 (en) |
FR (1) | FR2499913A1 (en) |
SE (1) | SE454425B (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2619764A1 (en) * | 1987-09-02 | 1989-03-03 | Bosch Gmbh Robert | CONTROL PISTON VALVE HELD BY TWO MEMBRANE SPRINGS FOR ADJUSTING THE INFLATION PRESSURE OF A PNEUMATIC TIRE OF A MOTOR VEHICLE DURING OPERATION |
FR2619762A1 (en) * | 1987-09-02 | 1989-03-03 | Bosch Gmbh Robert | TIRE PRESSURE CONTROL VALVE WITH HERMETICALLY ISOLATED DISCHARGE CHAMBER |
WO2011112416A1 (en) * | 2010-03-10 | 2011-09-15 | Accuride Corporation | Vehicle wheel assemblies and valves for use with a central tire inflation system |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102014101280B4 (en) * | 2014-02-03 | 2020-07-09 | Knorr-Bremse Systeme für Nutzfahrzeuge GmbH | Wheel valve device with valve protection cap |
EP3296131B1 (en) * | 2016-09-14 | 2019-06-19 | Dana Heavy Vehicle Systems Group, LLC | Wheel valve assembly with vent to atmosphere and the tire inflation system made therewith |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1882455A (en) * | 1930-10-04 | 1932-10-11 | Spicer Airflater Inc | Dual tire pressure equalizer |
DE1475924A1 (en) * | 1964-10-05 | 1971-05-06 | Berg Mfg & Sales Co | Valve, especially for pneumatic tires of vehicles, and its arrangement |
FR2362736A1 (en) * | 1976-08-28 | 1978-03-24 | Bosch Gmbh Robert | PRESSURE CONTROL UNIT |
FR2414159A1 (en) * | 1978-01-07 | 1979-08-03 | Wabco Westinghouse Gmbh | Pressure control valve for car tyre - incorporates double sprung elements to eliminate need for venting line in system |
-
1981
- 1981-02-18 DE DE19818104435U patent/DE8104435U1/en not_active Expired
-
1982
- 1982-02-17 SE SE8200973A patent/SE454425B/en not_active IP Right Cessation
- 1982-02-18 FR FR8202689A patent/FR2499913A1/en active Granted
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1882455A (en) * | 1930-10-04 | 1932-10-11 | Spicer Airflater Inc | Dual tire pressure equalizer |
DE1475924A1 (en) * | 1964-10-05 | 1971-05-06 | Berg Mfg & Sales Co | Valve, especially for pneumatic tires of vehicles, and its arrangement |
FR2362736A1 (en) * | 1976-08-28 | 1978-03-24 | Bosch Gmbh Robert | PRESSURE CONTROL UNIT |
FR2414159A1 (en) * | 1978-01-07 | 1979-08-03 | Wabco Westinghouse Gmbh | Pressure control valve for car tyre - incorporates double sprung elements to eliminate need for venting line in system |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2619764A1 (en) * | 1987-09-02 | 1989-03-03 | Bosch Gmbh Robert | CONTROL PISTON VALVE HELD BY TWO MEMBRANE SPRINGS FOR ADJUSTING THE INFLATION PRESSURE OF A PNEUMATIC TIRE OF A MOTOR VEHICLE DURING OPERATION |
FR2619762A1 (en) * | 1987-09-02 | 1989-03-03 | Bosch Gmbh Robert | TIRE PRESSURE CONTROL VALVE WITH HERMETICALLY ISOLATED DISCHARGE CHAMBER |
WO2011112416A1 (en) * | 2010-03-10 | 2011-09-15 | Accuride Corporation | Vehicle wheel assemblies and valves for use with a central tire inflation system |
Also Published As
Publication number | Publication date |
---|---|
SE454425B (en) | 1988-05-02 |
DE8104435U1 (en) | 1982-06-16 |
SE8200973L (en) | 1982-08-19 |
FR2499913B1 (en) | 1985-02-15 |
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Legal Events
Date | Code | Title | Description |
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DL | Decision of the director general to leave to make available licences of right | ||
ST | Notification of lapse |