JP2014058963A - Pressure governor device adapted to be provided for fluid transport circuit of vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pressure governor device having a simple and economical structure.SOLUTION: A governor valve 10 includes an insert 11 which is provided fixedly in a fluid passage 4, and has a valve seat 21 as, for example, a flexible valve seat, a fluid opening 12, and a closing member 25 which can move between a position where the fluid opening 12 is closed and a position where the fluid opening 12 is released from being closed. A governor device includes a plurality of bypass passages adapted so as to connect first and second fluid opening parts 5, 6 in terms of fluid, and a sealing member 22 capable of deforming between a first position where the sealing member 22 closes the bypass passages and a second position where the sealing member 22 opens the bypass passages, the sealing member 22 being adapted to deform toward the second position when the pressure on a downstream side of the governor valve 10 is higher than the pressure on an upstream side of the governor valve 10 by a predetermined amount.

Description

  The present invention relates to a pressure regulating device adapted to be provided in a fluid transfer circuit of a vehicle, for example a fuel circuit, more particularly a fuel supply or fuel return circuit.

For such a fuel return circuit, especially the return circuit from the injector,
A body including first and second fluid openings that delimit the fluid path and each drains into the fluid path;
A regulating valve in the fluid path of the body adapted to allow fuel to flow from the first fluid opening to the second fluid opening,
An insert provided in a sealed state in the fluid path, the insert including a fluid opening and a valve seat fluidly coupled to the first fluid opening;
A regulating valve comprising a closing position in which the closing member abuts the valve seat and closes the fluid opening; and a closing member that is movable between a release position in which the closing member comes off the valve seat and opens the fluid opening;
A filter provided on the regulating valve and arranged upstream of the fluid opening;
A regulating valve adapted to fluidly connect at least one bypass path or the first and second fluid openings of the body;
It is known from French Patent No. 2925614 to make a pressure regulating device provided on a regulating valve or body and with an annular seal with a sealing lip.

  In the regulating valve, the sealing lip of the sealing portion closes at least one bypass path, and the fuel flows between the regulating valve and the body in the direction from the first fluid opening to the second fluid opening. And a sealing lip of the sealing part opens at least a part of the bypass path, and fuel flows between the regulating valve and the body from the first fluid opening to the second fluid opening. It is provided so that it can move in the axial direction between the second position and the second position. The regulating valve is acted upon by a return spring adapted to maintain the regulating valve in the first position when the pressure upstream of the filter is not higher than a predetermined value.

  With such a structure of the pressure regulating device, if the pressure upstream of the regulating valve is higher than a predetermined value due to the filter clogging, the respective bypass path can be opened, and thus a part of the fuel upstream of the filter Can flow out to the second fluid opening. Such spillage of fuel causes a rapid drop in pressure upstream of the filter, thereby preventing damage to the regulating valve or components upstream thereof.

  However, such a pressure regulating device is very complex due to the presence of an assembly which is movably provided in translation in the fluid path of the body and is acted upon by a return spring. Such complexity greatly increases the manufacturing cost of the adjustment device and takes time to assemble.

  The object of the present invention is to remedy these drawbacks.

  Thus, the technical problem addressed by the present invention is to provide a pressure regulating device having a simple and economical structure.

For this purpose, the present invention is a pressure regulating device adapted to be provided in a fuel circuit of a vehicle,
A body including first and second fluid openings that delimit the fluid path and each drains into the fluid path;
A regulating valve in the fluid path adapted to allow fuel to flow from the first fluid opening to the second fluid opening;
An insert fixedly provided in the fluid path, the insert comprising a fluid opening and a valve seat fluidly connected to the first fluid opening;
-A closing member that is movable between a closing position in which the closing member abuts the valve seat and closes the fluid opening and a release position in which the closing member comes off the valve seat and opens the fluid opening, upstream of the regulating valve; A regulating valve that is designed to move to a release position when the side pressure is higher by a first predetermined amount than the pressure downstream of the regulating valve;
-At least one bypass path adapted to fluidly connect the first and second fluid openings;
A sealing member that is deformable between a first position where the sealing member closes at least one bypass path and a second position where the sealing member opens at least one bypass path; A pressure regulating device including a sealing member adapted to deform toward a second position when the pressure downstream of the regulating valve is higher than the pressure upstream of the regulating valve by a second predetermined amount About.

  Therefore, when the engine of the vehicle is in operation and the pressure on the upstream side of the regulating valve is higher than the pressure on the downstream side of the regulating valve by an amount corresponding to the first predetermined value, the closing member moves to the release position, Allowing fuel to flow from the first fluid opening of the body to the second fluid opening allows adjustment of the pressure in the fuel circuit.

  When the motor is stopped, the pressure on the downstream side of the regulating valve may be higher than the pressure on the upstream side of the regulating valve, which may cause a change in thermal balance. Such an imbalance between the pressure upstream and downstream of the regulator valve, which tends to impede cold start of the vehicle, is prevented by the presence of one or more bypass paths and sealing members. The

  Indeed, when the pressure downstream of the regulator valve is higher than the pressure upstream of the regulator valve by an amount corresponding to the second predetermined value, the fuel is routed from the second fluid opening through one or more bypass paths. Pressure is applied to the sealing member so that it flows into the sealing member, deforms toward the second position, and allows fuel to flow in the direction of the first fluid opening in the body. This fuel flow allows rebalancing of the upstream and downstream pressures of the regulator valve, thus allowing cold starting of the vehicle.

  Therefore, the pressure regulating device according to the present invention is simple by providing the regulating valve insert fixed in the fluid path while allowing the pressure in the fuel circuit to be regulated regardless of the operating condition of the vehicle engine. It has a low cost structure.

  The valve seat is preferably flexible and is made of rubber, for example FKM, GLT FKM or HNBR. With these features, the valve seat can be adapted to the shape of the closure member, and more specifically, the lack of closure member can be compensated for in terms of diameter, surface condition, shape, and the like. These features further allow the valve seat to support the shape of the particles between the valve seat and the occlusion member, and therefore when the occlusion member is in the first position, between the valve seat and the occlusion member. The flow of fuel can be greatly restricted. This improves the sealing of the regulating valve and therefore improves the regulating performance of the pressure regulating device even when there are no very low flow rates and flow rates (eg when decelerating with a pedal and idling). Such an increase in the regulation performance of the pressure regulating device enables optimization of the engine operation, in particular during re-acceleration, for example when decelerating with a pedal, or during a restart, for example when restarting an internal combustion engine of a hybrid vehicle The engine operation can be optimized. Such an improvement in the regulation performance of the pressure regulating device also makes it possible to achieve optimal fuel consumption and pollution control standards.

  In one embodiment of the invention, the sealing member preferably comprises an annular sealing lip.

  The adjustment device advantageously does not include a filter.

  The insert is preferably provided in contact with the body.

  The adjustment device advantageously comprises a securing means adapted to secure the insert relative to the body. For example, the securing means includes a securing member adapted to secure the insert relative to the body in the fluid path, and the securing member and the insert are adapted to press the closing member and the closing means toward the closed position. The housing is delimited by the return means. The fixing member can be formed of, for example, a metal or a plastic material.

  In one embodiment of the present invention, the return means includes a spring, such as a coil spring, that abuts the securing member and the closure member.

  The securing member advantageously includes at least one fuel flow opening adapted to fluidly connect the housing and the second fluid opening.

  The insert preferably includes at least one abutment surface against which at least a portion of the securing member abuts.

  In one embodiment of the present invention, the fixing member is provided in contact with the insert.

  In another embodiment of the invention, the securing member is provided on the insert.

  The body preferably includes an insertion opening adapted to drain into the fluid path and provide a regulating valve and a securing member in the fluid path. The securing means advantageously includes a securing plug adapted to cooperate to close the insertion opening and secure the securing member relative to the body. The locking plug can be formed from, for example, a metal or plastic material.

  In one embodiment of the invention, the body includes an abutment surface against which the insert abuts.

  In one embodiment of the invention, the insert includes a support ring on which a valve seat is provided. The support ring can be adapted to abut the abutment surface of the body, for example.

  In one embodiment of the invention, the valve seat is provided on a support ring.

  In one embodiment of the invention, the support ring is rigid, for example formed from a metal or plastic material.

  In one embodiment of the invention, the fluid opening of the insert is at least partially bounded by a valve seat. The fluid opening can be at least partially bounded equally by the valve seat and the sealing member.

  In one embodiment of the invention, the support ring has an annular rib on the outer surface adapted to cooperate with an annular groove on the inner surface of the securing member.

  The abutment surface against which at least a part of the fixing member abuts is preferably on the support ring.

  In one embodiment of the invention, the sealing member is provided on the support ring and is adapted to cooperate with the body when the sealing member is in the first position. The sealing member can be molded on a support ring, for example. The sealing member can equally be made of rubber.

  The support ring advantageously includes a first edge facing the first fluid opening and a second edge opposite the first edge, the sealing member being of the support ring. Protruding from the first edge.

  In one embodiment of the present invention, the insert includes a sealing portion that is provided on the support ring and supports the valve seat and the sealing member. The seal is preferably molded on or attached to the support ring.

  The body advantageously includes a frustoconical seating surface, and the sealing member is adapted to cooperate with the frustoconical seating surface when in the first position. The frustoconical seating surface advantageously converges towards the first fluid opening.

  In one embodiment of the present invention, the sealing member includes a frustoconical sealing surface adapted to cooperate with the frustoconical seating surface when the sealing member is in the first position. The sealing lip is advantageously at least partly bounded on the outside by a frustoconical sealing surface.

  The frustoconical seating surface preferably converges towards the first fluid opening of the body.

  The frustoconical seating surface preferably faces the first fluid opening and is advantageously between the abutment surface that is part of the body and the first fluid opening.

  In a variant of the invention, the seating surface of the body can be cylindrical and the sealing member has a frustoconical shape distributed in the direction of the first fluid opening.

  In another variant of the invention, the seating surface of the body can be flat and substantially perpendicular to the axis of the regulating valve, and the sealing member has a frustoconical shape converging in the direction of the first fluid opening. .

  In another embodiment of the invention, the sealing member is provided on the body and is adapted to cooperate with the insert and preferably the support ring when the sealing member is in the first position.

  In one embodiment of the invention, the sealing member and the valve seat are formed by two separate parts. In another embodiment, the sealing member and the valve seat are one piece.

  In one embodiment of the invention, the at least one bypass path includes a fuel flow groove on the inner surface of the body.

  In another embodiment of the invention, the at least one bypass path includes a fuel flow groove on the outer surface of the insert and preferably on the outer surface of the support ring.

  In another embodiment of the present invention, the at least one bypass path includes a fuel flow groove on the outer surface of the stationary member.

  In another embodiment of the invention, the at least one bypass path is a bounded fluid space between the body and the insert, more particularly between the body and the support ring, preferably over the entire length of the support ring. including.

  In one embodiment of the invention, the at least one bypass path includes a fluid opening that is bounded between the support ring and the body. This fluid opening can be partly bounded, for example, by a fluid groove on the edge of the support ring facing the first fluid opening.

  In one embodiment of the present invention, the at least one bypass path includes a first fluid opening bounded by the securing member and the insert, a fluid space bounded between the insert and the body, the body and the insert. Formed by a fluid opening delimited by.

  In one embodiment of the present invention, the insert, and more particularly the support ring, includes a plurality of longitudinal ribs on the outer surface adapted to cooperate with the inner surface of the body for press-fitting the insert of the body. . The longitudinal ribs are preferably distributed uniformly.

  In one embodiment of the present invention, the regulating valve and securing means can be assembled into a cylindrical casing to form a cartridge adapted to be inserted into the fluid path of the body. A cylindrical casing can be formed, for example from a metal, and is formed by the pressurization crimped | bonded to the circumference | surroundings of a regulating valve and a fixing means.

  The body of the pressure regulating device can be formed, for example, from a metal or plastic material.

  In any case, the present invention will be clearly understood by the following description with reference to the accompanying drawings, which represent non-limiting examples of embodiments of the pressure regulating device according to the present invention.

1 is a perspective view of a pressure adjustment device according to a first embodiment of the present invention. FIG. 2 is a longitudinal sectional view of the pressure adjustment device of FIG. 1. Sectional drawing seen along line III-III of FIG. Sectional drawing seen along line IV-IV of FIG. FIG. 2 is a partial cross-sectional perspective view of a main body of the pressure adjustment device of FIG. 1. The partial perspective view which cut | disconnected a part of pressure adjustment device of FIG. FIG. 2 is a partial longitudinal cross-sectional view of the pressure regulating device of FIG. 1 in a different operating position. FIG. 2 is a partial longitudinal cross-sectional view of the pressure regulating device of FIG. 1 in a different operating position. FIG. 6 is a partial longitudinal sectional view of a pressure regulating device according to a second embodiment of the present invention. The longitudinal direction fragmentary sectional view of the pressure adjustment device by the 3rd Embodiment of this invention. The longitudinal direction fragmentary sectional view of the pressure adjustment device by the 4th Embodiment of this invention. FIG. 9 is a partial longitudinal sectional view of a pressure regulating device according to a fifth embodiment of the present invention.

  1 to 8 show a first embodiment of a pressure regulating device 2 adapted to be provided in a fuel return circuit of an internal combustion engine vehicle.

  The pressure regulating device 2 includes a generally cylindrical elongate body 3 that delimits a longitudinal fluid path 4. The body 3 further includes a first fluid opening 5 and a second fluid opening 6 that each discharge into the fluid path 4. In the embodiment shown in FIGS. 1 and 2, the first fluid opening 5 discharges axially into the fluid path 4 and the second fluid opening 6 discharges radially into the fluid path 4.

  The body 3 further includes an insertion opening 7 that discharges axially into the fluid path 4, the use of which is described in more detail in the specification.

  The pressure regulating device 2 further includes first and second tubular stationary spigots 8, 9 fixed to the body 3 and having one end of the fuel pipe fixed to each end. The first fixed spigot 8 is fluidly connected to the first fluid opening 5, and the second fixed spigot 9 is fluidly connected to the second fluid opening 6.

  The pressure regulating device 2 includes a regulating valve 10 in the fluid path 4 of the body 3 adapted to flow fuel from the first fluid opening 5 to the second fluid opening 6.

  As shown in more detail in FIG. 7, the regulating valve 10 is fluid-tightly provided in the fluid path 4 of the body 3 and inserts 11 that delimit the fluid opening 12 fluidly connected to the first fluid opening 5. including. The insert 11 includes a rigid support ring 13 and a flexible seal 14 provided on the support ring 13 that delimits the fluid opening 12.

  The support ring 13 includes a first edge 13a facing the first fluid opening 5, and a second edge 13b opposite the first edge 13a. The first edge 13a contacts the lateral contact surface 15 of the main body 3, more specifically shown in FIG. The abutment surface 15 is substantially annular and is interrupted by a plurality of fluid depressions 16 which are preferably distributed uniformly. As shown in FIGS. 4 and 6, the support ring 13 further includes a plurality of fluid recesses 17 at the second edge 13b. The fluid wells 17 are preferably distributed uniformly. The support ring 13 further includes a plurality of longitudinal ribs 18 on the outer surface adapted to cooperate with the inner surface of the body 3 for press-fitting the insert 11 of the body 3. The longitudinal ribs 18 are advantageously distributed uniformly on the outer surface of the support ring 13. Each longitudinal rib 18 can have a varying height, for example decreasing in height, in particular in the direction of the first fluid opening 5.

  As shown in FIG. 4, the support ring 13 and the body 3 extend across the entire length of the support ring 13 and each defines a boundary of a plurality of fluid spaces 19 that discharge into one of the fluid wells 16 and one of the fluid wells 17. Determine. In the embodiment shown in FIGS. 1 to 8, the body 3 and the support ring 13 include four fluid recesses 16 and four fluid recesses 17, respectively, to delimit four fluid spaces 19.

  The sealing part 14 is made of rubber, for example, and includes a sealing lip 22 adapted to seal the valve seat 21 and the insert 11 to the body 3. The sealing lip 22 protrudes from the first edge 13 a of the support ring 13. In the embodiment shown in FIGS. 1 to 8, the sealing lip 22 is adapted to cooperate with a frustoconical seating surface 23 on the inner wall of the body 3. The frustoconical seating surface 23 advantageously converges towards the first fluid opening 5. The sealing lip 22 is advantageously bounded on the outside by a frustoconical sealing surface 24 adapted to cooperate with a frustoconical seating surface 23.

  The regulating valve 10 further includes a closed position (see FIG. 7) where the closing member 25 contacts the valve seat 21 and closes the fluid opening 12 (see FIG. 7), and a release position where the closing member 25 comes off the valve seat 21 and opens the fluid opening 12 (see FIG. 7). 8)). The regulating valve 10 also includes a compression coil spring 26 that is adapted to press the closure member 25 toward the closed position. The closing member 25 has a pressure at the upstream side of the regulating valve 10, that is, at the first fluid opening 5 substantially equal to the calibration pressure of the spring 26 than the pressure at the downstream side of the regulating valve 10, that is, at the second fluid opening 6. It is designed to be in the release position when it is higher by a corresponding predetermined amount.

  Here, the closing member 25 has an elongated cylindrical shape, and includes a truncated cone-shaped head 27 at an end facing the valve seat 21. However, the head 27 can have other shapes, such as a flat or rounded shape.

  The pressure regulating device 2 further includes a securing member 28, such as a securing ring, adapted to secure the insert 11 relative to the body 3 in the fluid path 4. More specifically, the fixing member 28 is provided in contact with the second edge 13 b of the support ring 13.

  The fixing member 28 and the insert 11 delimit a housing 29 in which the closing member 25 and the spring 26 are disposed. Accordingly, the spring 26 supports the fixing member 28 and the head 27 of the closing member 25, for example. The securing member 28 includes a fuel flow opening 31 adapted to fluidly connect the housing 29 and the second fluid opening 6.

  Note that the insertion opening 7 of the body 3 is adapted to allow the regulating valve 10 and the fixing member 28 to be inserted into the fluid path 4.

  The pressure regulating device 2 further comprises a closure plug 32 adapted to cooperate with the securing member 28 to fluidly close the insertion opening 7 of the body 3 and to secure the securing member 28 to the body 3. Including. Therefore, the fixing plug 28 that is in contact with the support ring and the support ring 13 that is in contact with the lateral contact surface 15 can be held by the closing plug 32. In one variation of the invention, the closure plug 32 and the securing member 28 can be formed as one piece.

  The pressure regulation device 2 also includes a plurality of bypass paths adapted to fluidly connect the first and second fluid openings 5, 6. Each bypass path is formed from one of the fluid spaces 19 and corresponding fluid recesses 16, 17. Furthermore, each bypass path is fluidly connected to the second fluid opening 6 via a fuel flow opening 31.

  The sealing lip 22 has a first position where the sealing lip 22 occludes the bypass path and prevents fuel from flowing between the first and second fluid openings 5, 6 via the bypass path, The lip 22 opens the bypass path and is deformable between a second position allowing fuel to flow between the first and second fluid openings 5, 6 via the bypass path. I want you to understand. However, the sealing lip 22 is adapted to deform toward the second position only when the pressure downstream of the regulator valve 10 is higher than the pressure upstream of the regulator valve 10. Accordingly, the bypass path allows fuel to flow only from the second fluid opening 6 to the first fluid opening 5.

  The operation of the pressure regulating device 2 will be described with respect to the use of the fuel return circuit.

  When the vehicle's internal combustion engine is operating, fuel is injected into the engine via fuel injection. The fuel that has not been injected into the engine by the injector is returned to the fuel tank via a fuel return circuit including the pressure regulating device 2.

  When the pressure difference between the pressure upstream of the regulating valve 10 and the pressure downstream of the regulating valve 10 is greater than the calibration pressure of the spring 26, the closing member 25 moves to the release position shown in FIG. As a result, the fuel flows from the first fluid opening 5 of the main body 3 to the second fluid opening 6 via the fuel flow opening 31 of the fixing member 28, and the pressure of the fuel return circuit can be adjusted. To.

  When the pressure difference between the pressure upstream of the regulating valve 10 and the pressure downstream of the regulating valve 10 is smaller than the calibration pressure of the spring 26, the closing member 25 remains in the closing position shown in FIG. As a result, fuel cannot flow from the first fluid opening 5 of the main body 3 to the second fluid opening 6. Therefore, the pressure on the upstream side of the regulating valve 10 can be increased until the target regulated value is reached.

  When the vehicle engine is stopped, the pressure on the downstream side of the regulating valve 10 may be higher than the pressure on the upstream side of the regulating valve 10. Such an imbalance associated with the occurrence of a pressure drop caused by the contraction of the fuel collected between the injector and the regulator valve 10 during cooling of the fuel may prevent cold starting of the vehicle.

  According to the present invention, when the pressure on the downstream side of the regulating valve 10 is higher than the pressure on the upstream side of the regulating valve 10 by a predetermined amount, the fuel flows from the second fluid opening 6 of the main body to the fuel flow opening 31 and the bypass path. To the sealing lip 22 and pressure is applied to the sealing lip 22 such that the sealing lip 22 is deformed toward the second position. The sealing lip 22 then moves away from the frustoconical seating surface 23 of the body 3, so that the fuel is then directed between the body 3 and the insert 11 in the direction of the first fluid opening 5 of the body 3. Flowing into. This fuel flow allows rebalancing of the upstream and downstream pressures of the regulator valve 10 and thus allows cold starting of the vehicle.

  FIG. 9 shows a pressure regulating device 2 according to the second embodiment. In the pressure adjusting device 2 shown in FIG. 9, the sealing lip 22 is fixed in a lip seal 33 provided in the outer surface of the support ring 13 or formed into the annular groove 34, and the bypass path is fixed. Basically different from those shown in FIGS. 1 to 8 in that a part is formed by the longitudinal groove 35 on the outer surface of the member 28 and the fluid recess 36 of the first edge 13a of the support ring 13. According to this second embodiment, the sealing lip 22 is adapted to cooperate with the cylindrical seating surface of the inner wall of the body 3.

  Further, according to the second embodiment, the fixing member 28 is provided on the support ring 13. Thus, the support ring 13 has on its outer surface an annular rib 37 adapted to cooperate with an annular groove 38 on the inner surface of the fixing member 28.

  Furthermore, according to this second embodiment, the sealing lip 22 is adapted to cooperate with a cylindrical seating surface rather than a frustoconical seating surface.

  FIG. 10 shows a pressure regulating device 2 according to the third embodiment. The pressure adjusting device 2 shown in FIG. 10 is basically different from that shown in FIG. 9 in that a lip seal 33 that supports the sealing lip 22 is provided in an annular groove 39 on the inner surface of the main body 3. Thus, according to this third embodiment, the sealing lip 22 is adapted to cooperate with the insert 11 and more particularly with the outer surface of the support ring 13.

  FIG. 11 shows a pressure regulating device 2 according to the fourth embodiment. The pressure regulating device 2 shown in FIG. 11 is adapted so that the sealing lip 22 cooperates with a seating surface 41 on the inner wall of the body 3, the seating surface 41 being flat and perpendicular to the axis of the regulating valve 10. Is basically different from that shown in FIG.

  FIG. 12 shows a pressure regulating device 2 according to the fifth embodiment. The pressure regulating device 2 shown in FIG. 12 is in that the sealing lip 22 includes an annular bead 42 at or near the free edge so as to optimize and thereby seal the contact area with the body 3. Is basically different from that shown in FIG. The annular bead 42 can also simplify the shape control of the functional surface of the sealing lip 22 to ensure final sealing.

  It goes without saying that the invention is not exclusively restricted to the embodiments of the pressure regulating device described above by way of example, but on the contrary encompasses all variants thereof. Thus, the sealing lip 22 can have any other particular shape.

Claims (15)

A pressure regulating device (2) adapted to be provided in a fluid transfer circuit of a vehicle, for example a fuel circuit, comprising:
A body (3) that includes first and second fluid openings (5, 6) that delimit the fluid path (4), each discharging into the fluid path (4);
A regulating valve (10) in the fluid path (4) adapted to allow fuel to flow from the first fluid opening (5) to the second fluid opening (6); And
An insert (11) fixedly provided in the fluid path (4), the fluid opening (12) and the valve seat (21) fluidly connected to the first fluid opening (5); An insert (11) comprising:
A closing position where the closing member (25) abuts the valve seat (21) and closes the fluid opening (12); and the closing member (25) comes off the valve seat (21) and opens the fluid opening (12). A closing member (25) movable between a release position to be opened, wherein the pressure on the upstream side of the regulating valve (10) is higher than the pressure on the downstream side of the regulating valve (10). A regulating valve (10) comprising a closure member (25) designed to move to a release position if it is only a fixed amount;
-At least one bypass path (16, 17, 19) adapted to fluidly connect said first and second fluid openings (5, 6);
-Deformable between a first position where the sealing member (22) closes the at least one bypass path and a second position where the sealing member (22) opens the at least one bypass path A second sealing member (22), wherein the pressure on the downstream side of the regulating valve (10) is higher than the pressure on the upstream side of the regulating valve (10) by a second predetermined amount; And a sealing member (22) adapted to deform toward the pressure adjustment device.   The adjustment device according to claim 1, wherein the valve seat is flexible, for example made of rubber.   Adjusting device according to claim 1 or 2, comprising fixing means adapted to fix the insert (11) to the body (3).   The securing means includes a securing member (28) in the fluid path (4) adapted to secure the insert (11) to the body (3), the securing member (28) and the The insert (11) delimits the housing (29) in which the closing member (25) and return means (26) adapted to press the closing means (25) towards the closing position are arranged. The adjustment device according to claim 3.   The securing member (28) includes at least one fuel flow opening (31) adapted to fluidly connect the housing (29) and the second fluid opening (6). 5. The adjusting device according to 4.   The adjustment device according to claim 4 or 5, wherein the insert (11) comprises at least one abutment surface (15) against which at least a part of the fixing member (28) abuts.   Insertion opening adapted to allow the body (3) to drain into the fluid path (4) and to provide the regulating valve (10) and a fixing member (28) in the fluid path (4) The adjusting device according to any one of claims 4 to 6, comprising a section (7).   A fixing plug adapted to cooperate with the fixing member (28) so that the fixing means closes the insertion opening (7) and fixes the fixing member (28) to the body. 32) The conditioning device of claim 7, comprising: 32).   The adjusting device according to any one of the preceding claims, wherein the body (3) comprises an abutment surface (15) against which the insert (11) abuts.   Adjustment device according to any one of the preceding claims, wherein the body (11) comprises a support ring (13) provided with the valve seat (21).   Adjustment according to claim 10, wherein the sealing member (22) is provided on the support ring (13) and is adapted to cooperate with the body (3) when in the first position. device.   Adjustment according to claim 11, wherein the insert (11) is provided on the support ring (13) and comprises a sealing part (14) supporting the valve seat (21) and the sealing member (22). device.   13. Adjustment device according to claim 12, wherein the sealing part (14) is molded on the support ring (13).   12. Adjustment device according to any one of the preceding claims, wherein the sealing member (22) and the valve seat (21) are formed by two separate parts.   The body (3) includes a frustoconical seating surface (23), and the sealing member (22) is adapted to cooperate with the frustoconical seating surface (23) when in the first position. 15. A conditioning device according to any one of the preceding claims.

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