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
  • B60C23/001—Devices for manually or automatically controlling or distributing tyre pressure whilst the vehicle is moving
  • B60C23/003—Devices for manually or automatically controlling or distributing tyre pressure whilst the vehicle is moving comprising rotational joints between vehicle-mounted pressure sources and the tyres
• • 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
  • B60C29/00—Arrangements of tyre-inflating valves to tyres or rims; Accessories for tyre-inflating valves, not otherwise provided for
  • B60C29/002—Arrangements of tyre-inflating valves to tyres or rims; Accessories for tyre-inflating valves, not otherwise provided for characterised by particular features of the valve core
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
  • F17D—PIPE-LINE SYSTEMS; PIPE-LINES
  • F17D3/00—Arrangements for supervising or controlling working operations
  • F17D3/01—Arrangements for supervising or controlling working operations for controlling, signalling, or supervising the conveyance of a product
• • 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
  • B60C29/00—Arrangements of tyre-inflating valves to tyres or rims; Accessories for tyre-inflating valves, not otherwise provided for
  • B60C29/02—Connection to rims
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T137/00—Fluid handling
  • Y10T137/2496—Self-proportioning or correlating systems
  • Y10T137/2559—Self-controlled branched flow systems
  • Y10T137/2574—Bypass or relief controlled by main line fluid condition
  • Y10T137/2605—Pressure responsive
  • Y10T137/2607—With pressure reducing inlet valve
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T137/00—Fluid handling
  • Y10T137/3584—Inflatable article [e.g., tire filling chuck and/or stem]
  • Y10T137/36—With pressure-responsive pressure-control means

Definitions

• the invention relates to the technical sector of pneumatic controlled devices, automatic inflating and deflating of a tire in particular, but also of all capacities for storing a gaseous fluid under a pneumatic device. pressure.
• pneumatic devices controlled, inflation-deflation automatic tire are intended to be controlled remotely and in particular from the passenger compartment of a vehicle for example.
• These devices make it possible to adjust the pressure of the tires from inside the vehicle by simply interacting with a control interface. This is particularly useful for vehicles of rally, military or agricultural types whose tire pressure is generally less than 5 bar.
• These devices are generally designed for all vehicle drivers needing to vary tire pressure. And in particular to vary the pressure of the tires to adapt to the coatings on which they move, the loads they carry and the speed of movement of the vehicle.
• this device for inflating and deflating a capacity is of the type comprising, on the one hand, a cavity (1) divided by a flexible membrane (2) into two so-called pilot chambers (3) and exhaust system (4) communicating, for the first, with a relative pressurizing circuit and, for the second, with a bore (5) in relation to the capacity, and with at least one exhaust duct (6) opening out of the cavity and, on the other hand, a valve system (7) able to close or open the passage at least between the bore and the exhaust duct and comprising:
• the inflation valve (7) and the exhaust valve (1 1) are mounted in opposition, on both sides of the membrane (2) and are sensitive at the position thereof, so as to form a movable element of two valves controlled by the membrane (2),
• a disadvantage of this device is that its arrangement is realized so that the deflation of the capacity is at low pressure. This means that it is impossible to be able, when said device is subject to a measuring device, to measure at low pressure. Indeed, by wanting to perform a measurement of a relatively low pressure, one would go directly deflation phase of the tire instead of making the measurement. Many vehicles use low inflation pressures below 5 bar, including agricultural vehicles, geological research, SUVs, etc.
• the object of the invention is to remedy this disadvantage in a simple, safe, effective and rational manner.
• the problem to be solved by the invention is therefore to provide a pneumatic device controlled inflation-deflation automatic tire including, which allows to manage low limit pressures. This means that with such a device, it will be possible to inflate a tire at low pressure but also to measure a low pressure.
• a pneumatic device controlled inflation-deflation automatic tire including, comprising a hollow body comprising an orifice of admission subject to means for injecting a gaseous fluid under pressure, in particular air, an inflation orifice in communication with the tire at a pressure (PO) and, an outlet orifice for said gaseous fluid to the outside of the hollow body.
• this device comprises a piston slidably mounted in at least one chamber of the body under the effect of the injection of the gaseous fluid under pressure via the inlet orifice, said piston cooperating with a set movable in combination with an exhaust valve so that:
• the body comprises three internal chambers arranged successively, said piston is able to slide in the first chamber, then dividing it into two different pressure zones, openings are made between the first zone of the first chamber and the second chamber and the second and third chambers thus enabling their communication, the first zone of the first chamber being formed of said inlet orifice of a first side of said piston and the second zone of the first chamber being formed of said exhaust orifice; on the other side of said piston, and the third chamber being formed of said inflation port.
• said piston comprises a hollow piston head intended to slide in a sealed manner in the first chamber, and a hollow piston body, in communication with said piston head, and to slide in a sealed manner in the exhaust valve closing the opening formed between the second zone of the first chamber and the second chamber, the piston body opening into the second chamber and being closed by the movable element, said body and said piston head are in communication with the inlet port
• Said movable element comprises a central axis slidably mounted in the hollow body, an injection valve and an inflation member fixedly mounted on said axis, said injection valve being arranged to close the opening between the second and third chambers, and said inflation member being arranged to close the passage between the first zone of the first chamber and the second chamber.
• said inflation member comprises a first guide portion in the form of a cylindrical element, fixed on the axis and partially and non-sealingly inserted into the end of the piston body.
• a second portion serving as an inflation valve also in the form of a cylindrical element of diameter substantially equal to that of the piston body and intended to come into contact with said piston body, and a third part under the shape of a non-return valve, influenced by the direction of passage of the gaseous fluid, so as to be free in the direction from the first zone of the first chamber to the second chamber, and impervious to a fast flow going into the opposite direction and not sealed to a slow flow going in the same direction opposite.
• said first elastic member is attached at one end to said injection valve and at the other end abuts against the opposite wall of the third chamber.
• Said second elastic member is arranged inside said piston between the bottom of said piston and the first guide portion of said inflation member.
• said third resilient member is attached at one end to said exhaust valve and at the other end abuts against the opposite wall of said second chamber.
• FIG. 1 is a longitudinal sectional view of FIG. a pneumatic device for automatically inflating and deflating a tire, in particular according to the prior art;
• FIG. 2 is a longitudinal sectional view of a pneumatic controlled device for automatic inflation and deflation of a tire, in particular according to the invention, in the rest position;
• FIG. 3 is a longitudinal sectional view of a pneumatic device controlled automatic inflation-deflation of a tire, in particular, according to the invention, in the inflation or measurement position;
• FIG. 4 is a longitudinal sectional view of a pneumatic device for automatic inflation and deflation of a tire, according to the invention, in deflation position;
• - Figure 5 is a longitudinal sectional view of another embodiment of a pneumatic device controlled automatic inflation-deflation of a tire including, according to the invention, in the rest position.
• - Figure 6 is a longitudinal sectional view showing the movable member assembly, cooperating with the piston, according to another embodiment of the invention and in the rest position;
• the pneumatic controlled device (15) for automatic inflation and deflation of a tire in particular comprises a hollow body (16) of non-limiting, substantially cylindrical shape and comprises three internal chambers (17, 18 , 19) sequentially arranged.
• the first chamber (17) includes an inlet (20) and an exhaust port (21).
• the inlet orifice (20) is intended to be secured to gaseous fluid injection means, generally constituted by pipe elements, rotating joints, pressure regulating means and a compressor for example , and means for measuring pressure such as a manometer.
• the exhaust port (21) is in communication with the outside of the hollow body (16). This allows the deflation of the tire, to evacuate the gaseous fluid directly from the hollow body (16) without ironing the rotating joints and the pressure regulating means. Openings (22, 23) are provided between the first (17) and second (18) chambers and the second (18) and third (19) chambers thereby enabling their communications.
• the third chamber (19) includes an inflation port (24) for connection to the pneumatic inflate-deflate or whose pressure is to be measured.
• This inflation orifice (24) can of course be connected to any other gaseous fluid storage capacity under pressure.
• the chambers (17, 18, 19) and the orifices (20, 21, 24) are generally cylindrical in shape.
• connection between the orifices (20, 21, 24) and the measurement means, gaseous fluid injection or with the tire are performed by means of flexible pipes well known to those skilled in the art.
• the device (15) being mounted on the rim of the vehicle, the connection between the compressor and said device (15) is via a system comprising a rotary joint. This system is not part of the invention and is also well known to those skilled in the art, it will not be described in more detail.
• a piston (25) is arranged in the first chamber (17) and then divides it into two zones (17a, 17b) of different pressures.
• the intake port is present in the first zone (17a) and the exhaust port is present in the second zone (17b).
• Said piston (25) is slidable between the intake port (20) and the exhaust port (21).
• This piston (25) comprises a piston head (25a) and a piston body (25b).
• the piston head (25a) is cylindrical in shape with a diameter substantially equal to that of the first chamber (17).
• This piston head (25a) also comprises an annular seal (26) arranged on its periphery to allow it to slide in said first chamber (17) sealingly.
• This piston head (25a) is extended by the piston body (25b) which is also cylindrical with a diameter smaller than that of the piston head (25a).
• the diameter of the piston body (25b) is such that it is able to enter the second chamber (18) through the opening (22) present.
• This piston body (25b) is able to slide tightly in an exhaust valve (27) arranged in the second chamber (18) to seal said opening (22).
• the exhaust valve (27) is in this manner in the form of a cylindrical sleeve (27a) comprising a shoulder (27b) intended to close off said opening (22).
• the shoulder (27b) comprises on its face facing the opening (22), a seal member (28) for sealing.
• the sleeve (27a) is thus adapted to receive the piston body (25b) and in this way comprises an annular seal (29) on its inner periphery to also seal.
• the exhaust valve (27) is held in the closed position of the opening (22) by means of a spring (30) fixed at one end to said sleeve (27a) and at the other end in abutment against the opposite wall of said second chamber (18).
• a shoulder (31) is also provided between the piston head (25a) and the piston body (25b).
• This shoulder (31) is intended to cooperate with the end of the sleeve (27a) to, when the piston (25) slides and reaches the end of stroke, come into contact against said sleeve (27a) and slide it to the against said spring (30) to release the opening (22) between the second zone (17b) of the first chamber (17) and second (18) chambers.
• Said piston (25) is hollow and open at both ends. The end in the second chamber (18) is fully open and the end in the first chamber (17) is open through at least one channel (32, 33), thereby leaving the piston (25) a bottom face (34).
• the piston (25) is in this way in communication at one end with the inlet (20) and at the other end with the second chamber (18).
• the piston (25) also cooperates with a movable element (35, 36, 39) comprising an axis (35) on which is mounted an injection valve (36) intended to close the opening (23) present between the second ( 18) and third (19) rooms.
• This injection valve (36) is associated with a spring (38) attached at one end to said injection valve (36) and at the other end abuts against the opposite wall of the third chamber (19).
• An inflation member (39) is also fixedly mounted on said axis (35) and cooperates with the open end of said piston body (25b).
• the inflation member (39) comprises three parts, a first guide portion (39a) in the form of a cylindrical member fixed on the axis (35), comprising orifices for passing the gaseous fluid, and partially and non-sealingly inserted in the end of the piston body (25b) to guide said piston (25) to keep it centered.
• the second portion (39b) of the inflation member (39) serves as an inflation valve and is also in the form of a cylindrical element of diameter substantially equal to that of the piston body (25b) and intended to come in contact with said piston body (25b). This second part (39b) is also fixed on the axis (35).
• the third portion (39c) of the inflator (39) is in the form of a ring or a free or flexible washer made of elastomeric material, in particular rubber, arranged flush and influenced by the direction of passage of the gaseous fluid.
• This third part acts as a non-return valve (39c).
• This third part (39c) is a non-return valve and is intended to retain a fast flow from the second chamber (18) to the first zone (17a) of the chamber (17) to facilitate setting free air of the first zone (17a) of the chamber (17).
• This non-return valve (39c) is not tight to a slow flow so as to compensate for slight leaks in the pipe to stabilize the measurement phase in particular.
• An elastic element in particular a spring (40) is arranged between the first portion (39a) of the inflation member (39) and the bottom face (34) of the piston (25) pushing the latter against a stop element ( 41) fixed to the end of the axis (35).
• FIG. 2 which represents the rest phase of the device (15)
• the first (17) and second (18) chambers are at atmospheric pressure and the third chamber (19) ) is at the tire pressure, if a tire is connected to the inflation port (24).
• the piston (25) is in a rest position.
• the injection valve (36) of the third chamber (19) is closed and held in this position by the spring (38) and also by the pressure of the tire.
• the inflation member (39) is in the open position, that is to say that the second portion (39b) does not come into contact with the end of the piston body (25b).
• the exhaust valve (27) is closed and held in this position by the spring (30).
• the first zone (17a) of the first chamber (17) receives gaseous fluid under pressure.
• This chamber is then at a pressure P1 greater than the pressure P0 of the tire.
• This displacement of the piston (25) causes the simultaneous displacement of the movable element (35, 36, 39), namely, the axis (35), the injection valve (36) and the inflation member (39). ) to a stop position of one of the three elements.
• the injection valve (36) which abuts against the opposite wall of the third chamber (19).
• the spring (38) holding the valve in the closed position compresses and the injection valve (36) releases the opening (23) present between the second (18) and the third (19) chamber.
• the exhaust valve (27) remains fixed and in the closed position. At the stop, the pressure is such that it moves no other element.
• the gaseous fluid then passes from the first zone (17a) of the first chamber (17) into the piston (25), escapes through the non-return valve (39c), which is passing in this direction, from the inflation valve (39) which has remained open, passes into the second chamber (18) and passes through the third chamber (19), the injection valve (36) being open, thereby inflating the tire.
• the pressure P 1 of the gaseous fluid injected by the admission orifice (20) is greater than that of the tire P0. But also that the force exerted by said pressure is sufficient to come against the restoring force of the spring (38) tending to maintain in closed position the injection valve (36) of the third chamber (19). This force exerted by the pressure must also be low enough not to come against the restoring force exerted by the spring (40) inside the piston (25) and thus not to trigger the deflation phase.
• the first zone (17a) of the first chamber (17) receives gaseous fluid at a higher pressure P2 than for the inflation phase.
• This chamber is then at a pressure P2 greater than the pressure Pl.
• This displacement of the piston (25) in this deflation position brings the end of the piston body (25b) in contact with the inflation valve (39b), the inflation member (39) which results in the closure of this one.
• This displacement also causes the simultaneous movement of the movable element (35, 36, 39), namely, the axis (35), the injection valve (36) and the inflation member (39) up to a stop position of one of the three elements.
• the injection valve (36) which abuts against the opposite wall of the third chamber (19).
• the spring (38) holding the injection valve (36) in the closed position compresses and the injection valve (36) releases the opening (23) between the second (18) and the third (19). ) bedroom.
• the force exerted by the pressure injected by the inlet orifice (20) is sufficiently large to meet the restoring force of the three springs (30, 38, 40) present in the device (15) to allow the displacement of the valves (36, 27) and that of the piston (25) to the deflation position.
• the return phase to the rest position is characterized by the fact that there is venting of the pipework at the inlet orifice (20).
• the gaseous fluid of the tire is braked by the non-return valve (39c) of the inflation member (39) which is impervious to fast flow.
• the pressure on the piston (25) vanishes and it can return to its rest position.
• FIG. 5 represents a second embodiment of the device (15) according to the invention.
• This second embodiment comprises the same elements as the first but differs in that the abutment of the movable element is formed by the inflation member (39). Which ensures a better stability in position of deflation.
• the non-return valve (39c) of the inflation member (39) is represented by a flexible washer.
• the inflation valve (39b) is arranged in the body of the piston (25), so as to let the gaseous fluid through the channels (32, 33) in the inflation phase, at the pressure P1 in the first zone (17a) the first chamber (17), and coming into contact with the bottom (34) of the piston (25) to close the channels (32, 33) and close the inflation member (32, 33), in the deflation phase at the pressure P2 in the first zone (17a) of the first chamber (17).
• the invention provides a device (15) pneumatically controlled inflation-deflation automatic tire including, giving full satisfaction and having in particular the advantages of being able to manage the low limit pressures, it that is to say, to be able to measure a low pressure, to inflate a tire at low pressure and to deflate at high pressure.
• This device also allows to have a longer life than some devices of the prior art.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Measuring Fluid Pressure (AREA)
• Check Valves (AREA)
• Tires In General (AREA)
• Control Of Fluid Pressure (AREA)
• Winding Of Webs (AREA)
• Valves And Accessory Devices For Braking Systems (AREA)

Priority Applications (9)

Applications Claiming Priority (2)

Publications (1)

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ID=47022960

Family Applications (1)

Country Status (11)

Cited By (1)

Families Citing this family (30)

Citations (2)

Family Cites Families (12)

• 2011
  • 2011-09-13 FR FR1158104A patent/FR2979853B1/fr active Active
• 2012
  • 2012-09-12 CA CA2848321A patent/CA2848321C/fr active Active
  • 2012-09-12 AU AU2012307203A patent/AU2012307203B2/en active Active
  • 2012-09-12 IN IN787KON2014 patent/IN2014KN00787A/en unknown
  • 2012-09-12 BR BR112014005613-7A patent/BR112014005613B1/pt active IP Right Grant
  • 2012-09-12 PL PL12773026T patent/PL2755830T3/pl unknown
  • 2012-09-12 EP EP12773026.5A patent/EP2755830B1/fr active Active
  • 2012-09-12 CN CN201280051177.3A patent/CN103889744B/zh active Active
  • 2012-09-12 WO PCT/FR2012/052039 patent/WO2013038107A1/fr not_active Ceased
  • 2012-09-12 US US14/344,851 patent/US9308788B2/en active Active
• 2014
  • 2014-03-11 ZA ZA2014/01762A patent/ZA201401762B/en unknown

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