Valve arrangement for fluid control system

Abstract

A valve device for a fluid control system includes a housing including a fluid inlet, a fluid outlet and extending along a central axis. The valve arrangement includes a valve member movable along a central axis between a first position closing a fluid inlet and a second position defining a maximum valve lift between the two positions. The valve device includes: a biasing member that biases a valve member toward a first position; and an intermediate member movable relative to the valve member along a central axis. The valve arrangement comprises a first stop and a second stop between which the intermediate member is axially movable, the relative axial movement being within a range less than the maximum valve lift. During an initial axial movement of the valve member from the first position, the intermediate member moves relative to the first and second stops, the subsequent movement of the valve member being resisted by an intermediate friction generated by the intermediate member when the intermediate member reaches a limit of a range of relative axial movement.

Description

Technical Field

[0001] The present disclosure generally relates to valve arrangements. In particular aspects, the present disclosure relates to a valve arrangement for a fluid control system. The present disclosure may be applicable to heavy vehicles such as trucks, buses, and construction equipment, among other vehicle types. Although the present disclosure may be described with respect to a particular vehicle, the present disclosure is not limited to any particular vehicle. Background Art

[0002] Valve devices, such as pressure relief valves, can experience rapid oscillations between open and closed positions, a condition known as valve chatter. Valve chatter can lead to damage to the valve device. Therefore, there is a need for improved techniques related to such valve devices. Summary of the Invention

[0003] According to a first aspect of the present disclosure, there is provided a valve device for a fluid control system, comprising: a housing, the housing comprising a fluid inlet and a fluid outlet, the housing extending along a central axis. The valve device further comprises a valve component, the valve component being movably arranged relative to the housing along the central axis between a first position and a second position, wherein in the first position, the fluid inlet is closed by the valve component, and wherein a maximum valve lift is limited between the first position and the second position. The valve device further comprises a biasing member, the biasing member being configured to bias the valve component toward the first position; and an intermediate component, the intermediate component being movably arranged relative to the housing and the valve component along the central axis. The valve device also includes a first stop and a second stop, wherein the intermediate component is axially movable relative to the first stop and the second stop, so that: the range of relative axial movement is defined by contact between the intermediate component and the first stop and between the intermediate component and the second stop, wherein the range of relative axial movement is less than the maximum valve lift, and so that: during initial axial movement of the valve component from the first position, the intermediate component moves relative to the first stop and the second stop, and when the intermediate component reaches the limit of the range of relative axial movement, subsequent movement of the valve component in the same direction as the initial axial movement is resisted by an intermediate friction force at least partially generated by the intermediate component.

[0004] The valve arrangement may comprise, for example, a pressure relief valve. The housing may comprise a single part, or alternatively, the housing may comprise a plurality of parts configured to be fixed at least in position relative to each other. The biasing member may comprise, for example, a spring. The valve arrangement may further comprise a valve seat, wherein the valve component is configured to abut the valve seat at the first position. The valve arrangement may further comprise a valve stop, wherein the valve component is configured to abut the valve stop at the second position. Alternatively, the second position may be defined by, for example, a limit of the biasing member, such as, when the biasing member comprises a spring, a maximum compression, such as the solid height of the spring. The range of relative axial movement may be between 10% and 50% of the maximum valve lift.

[0005] A first aspect of the present disclosure may seek to reduce valve chatter. Technical benefits may include reduced noise and vibration, increased wear resistance and durability, and improved performance, among others.

[0006] Optionally, in some examples, including at least one preferred example, the initial axial movement is resisted by an initial friction force, and wherein the initial friction force is less than the intermediate friction force. A technical benefit may include slowing the speed at which the valve member moves toward the second position after the initial movement from the first position.

[0007] Optionally, in some examples, including at least one preferred example, the initial friction force is at least partially formed by friction generated between the valve member and the housing. Technical advantages may include that the valve member can be guided by the housing during initial axial movement of the valve member from the first position.

[0008] Optionally, in some examples, including at least one preferred example, the initial friction force is at least partially formed by friction generated between the intermediate component and the housing. Technical advantages may include that during the initial axial movement of the valve component from the first position, the intermediate component can be guided by the housing.

[0009] Optionally, in some examples, including at least one preferred example, the initial friction force comprises metal-to-metal contact. Technical benefits may include that the initial friction force may comprise predictable behavior.

[0010] Optionally, in some examples, including at least one preferred example, the intermediate friction force is generated between the intermediate component and the valve component. Technical benefits may include that the valve component can be guided by the intermediate component during subsequent movement of the valve component toward the second position after the initial axial movement.

[0011] Optionally, in some examples, including at least one preferred example, the intermediate friction force is generated between the intermediate component and the housing. Technical advantages may include that the intermediate component can be guided by the housing during subsequent movement of the valve component toward the second position after the initial axial movement.

[0012] Optionally, in some examples, including at least one preferred example, the intermediate component includes an intermediate member and a friction member, wherein the intermediate friction force is at least partially generated by the friction member. Technical benefits may include the ability to use a friction member with stable and relatively high dynamic friction to attenuate valve motion.

[0013] Optionally, in some examples, including at least one preferred example, the valve component includes a friction member, wherein the intermediate friction force is at least partially generated by the friction member. Technical benefits may include the ability to use a friction member with stable and relatively high dynamic friction to attenuate valve motion.

[0014] Optionally, in some examples, including at least one preferred example, the housing includes a friction member, wherein the intermediate friction force is at least partially generated by the friction member. Technical benefits may include the ability to use a friction member with stable and relatively high dynamic friction to dampen valve motion.

[0015] Optionally, in some examples, including at least one preferred example, the intermediate member is made of a relatively rigid material, such as metal / plastic / ceramic, and the friction member is made of a relatively soft and / or resilient material, such as PTFE or rubber / elastomer. Technical benefits may include the ability to use a friction member with stable and relatively high dynamic friction to dampen valve motion.

[0016] Optionally, in some examples, including at least one preferred example, the friction member includes an energizing elastic element configured to press the friction member toward an opposing surface. Technical benefits may include increasing the elasticity of the friction member, thereby improving contact with the opposing surface.

[0017] Optionally, in some examples, including at least one preferred example, the friction member can be an annular member. Technical benefits can include that the friction member can help center movement of the valve component within the valve assembly.

[0018] Optionally, in some examples, including at least one preferred example, the intermediate member is an annular member. Technical benefits may include that the intermediate member may help center the movement of the valve member in the valve device.

[0019] Optionally, in some examples, including at least one preferred example, the intermediate component is arranged radially inside the valve component relative to the central axis of the housing. At least in some examples, technical benefits may include a more compact arrangement.

[0020] Optionally, in some examples, including at least one preferred example, the intermediate component is disposed radially outside the valve component relative to the central axis of the housing. At least in some examples, technical benefits may include enabling a less complex valve component.

[0021] Optionally, in some examples, including at least one preferred example, the valve member includes a fluid passage configured to provide communication between the fluid inlet and the fluid outlet when the valve member is not in the first position. At least in some examples, a technical benefit can include providing a reduced flow path.

[0022] Optionally, in some examples, including at least one preferred example, the housing includes a fluid passage configured for communication between the fluid inlet and the fluid outlet when the valve member is not in the first position. At least in some examples, a technical benefit can include enabling a less complex valve member.

[0023] Optionally, in some examples, including at least one preferred example, the axial distance between the first stop and the second stop is adjustable. Technical benefits may include adapting the valve arrangement to different applications. Furthermore, the valve arrangement may be adjusted over time to account for wear.

[0024] Optionally, in some examples, including at least one preferred example, the valve device is configured such that when the valve member is in an initial return position (wherein at the initial return position the valve member is displaced relative to the first position), during the initial axial return movement of the valve member toward the first position, the intermediate member moves relative to the first stop and the second stop until the limit of the range of the relative axial movement is reached.

[0025] Optionally, in some examples, including at least one preferred example, the valve device is configured such that when the displacement between the initial return position and the first position is greater than the range of relative axial movement, subsequent return movement of the valve member in the same direction as the initial axial return movement is resisted by an intermediate friction force generated at least in part by the intermediate member. Technical benefits may include reduced noise and vibration, increased wear resistance and durability, and improved performance.

[0026] According to a second aspect of the present disclosure, a vehicle is provided, comprising a valve device according to any one of the examples of the first aspect. The second aspect of the present disclosure may seek to prevent valve chatter in the valve device of the vehicle. Technical benefits may include reduced damage to the valve device of the vehicle. The technical effects and advantages of the second aspect are similar to those of the first aspect.

[0027] The disclosed aspects, examples (including any preferred examples) and / or the appended claims may be appropriately combined with each other, as will be apparent to anyone skilled in the art. Additional features and benefits are disclosed in the detailed description, claims, and drawings, and in part will be apparent to those skilled in the art or recognized by practicing the disclosure as described herein. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Examples are described in more detail below with reference to the accompanying drawings.

[0029] Figure 1 is an exemplary vehicle according to an example.

[0030] Figure 2a is an exemplary valve arrangement according to an example.

[0031] Figure 2b is an exemplary valve arrangement according to an example.

[0032] Figure 2c is an exemplary valve arrangement according to an example.

[0033] Figure 2d is an exemplary valve arrangement according to an example.

[0034] Figure 3 is an exemplary valve arrangement according to an example.

[0035] Figure 4 is an exemplary valve arrangement according to an example.

[0036] Figure 5 is an exemplary valve arrangement according to an example.

[0037] Figure 6 is an exemplary valve arrangement according to an example.

[0038] Figure 7 is an exemplary valve arrangement according to an example.

[0039] Figure 8 Based on the example Figure 2a Another view of .

[0040] The accompanying drawings are schematic and may not necessarily be drawn to scale. Unless otherwise specified, like reference numerals throughout the accompanying drawings refer to identical or similar elements. In some drawings, some reference numerals may be omitted for clarity. DETAILED DESCRIPTION

[0041] The detailed description set forth below provides information and examples of the disclosed technology in sufficient detail to enable those skilled in the art to practice the disclosure.

[0042] Valve devices, such as pressure relief valves, can experience rapid oscillations between the open and closed positions, a condition known as valve chatter. Conditions can include excessive inlet pressure drop or backpressure, while causes can include incorrect valve sizing or turbulent flow.

[0043] Valve chatter can cause damage to the valve assembly and to upstream or downstream hydraulic components in the system. Damage caused by valve chatter may include damage to the valve seat, valve misalignment, spring failure, or mechanical failure of the valve components.

[0044] Therefore, there is a need to develop improved techniques related to such valve arrangements.

[0045] Figure 1 is an exemplary illustration of the present disclosure including a side view of a vehicle 2 according to an example in the form of a truck 2. Although the illustrated aspect includes a truck 2, the vehicle 2 may include any type of vehicle such as an automobile, bus, industrial vehicle, airplane, train, ship, etc.

[0046] In the example shown, vehicle 2 includes a fluid control system 4, such as a hydraulic or pneumatic system. Fluid control system 4 can be configured to control fuel, brake fluid, motor oil, transmission fluid, coolant, or any known fluid used for the function of vehicle 2. Fluid control system 4 can include a fluid source (e.g., a reservoir), a fluid destination (e.g., a nozzle), and a fluid path extending between the fluid source and the fluid destination. In at least some examples, fluid control system 4 can include an annular fluid path.

[0047] Alternatively, the present disclosure may relate to fluid control systems 4 for applications other than vehicles.

[0048] The fluid control system 4 comprises a valve arrangement 6 .

[0049] Figures 2a to 2dAn exemplary valve device 6 for a fluid control system 4 according to an example is shown. The valve device 6 can be, for example, a pressure relief valve configured to regulate pressure in the fluid control system 4. The valve device 6 includes a housing 8. The housing 8 includes a fluid inlet 10 and a fluid outlet 12. The fluid inlet 10 is in fluid communication with a fluid path (not shown) of the fluid control system 4. The housing 8 extends along a central axis X. In the example shown, the fluid inlet 10 and the fluid outlet 12 are both located on opposite sides of the housing 8 along the central axis X. In at least some examples, the fluid inlet 10 and / or the fluid outlet 12 can be located peripherally of the central axis, for example, the fluid inlet 10 can extend along the central axis X, while the fluid outlet 12 can extend at an angle to the central axis X (e.g., perpendicular to the central axis X).

[0050] The housing 8 may comprise a single part, or alternatively, the housing 8 may comprise a plurality of parts configured to be fixed at least in position relative to each other, for example, the parts of the housing 8 may be connected together, or alternatively, the parts of the housing 8 may be fixed by being connected to the same element (e.g., a bracket, etc.). The housing 8 may comprise metal (e.g., aluminum, stainless steel, etc.) or plastic, or a combination thereof.

[0051] The valve device 6 further comprises a valve member 14 which is arranged movably relative to the housing 8 along the central axis X in a first position P1 (eg Figure 2a ) and the second position P2 (as shown Figure 2c ), and wherein the maximum valve lift is defined between the first position P1 and the second position P2. Furthermore, in the example shown, the valve member 14 is located between the fluid inlet 10 and the fluid outlet 12. In at least some examples, at least a portion of the valve member 14 can extend beyond the fluid outlet 12 along the central axis X.

[0052] In at least some examples, the fluid inlet 10 is configured such that fluid flow in the fluid path can exert a force on the valve member 14 , wherein the force has a component acting parallel to the central axis X.

[0053] In the example shown, valve member 14 includes an integrally formed first portion 38 and a second portion 40, wherein first portion 38 includes a cylindrical shape and second portion 40 includes a conical shape. First portion 38 is arranged so that it is guided by housing 8. In alternative examples, valve member 14 can simply be formed in a cylindrical shape, a conical shape, or any other shape. In at least some examples, valve member 14 can include a valve disc, wherein the fluid flow in the fluid path can exert a force on the valve disc.

[0054] In the first position P1, the fluid inlet 10 is closed by the valve member 14. The valve device 6 may further include a valve seat 42 arranged at the fluid inlet 10, wherein the valve member 14 is configured to abut the valve seat 42 in the first position P1. The valve seat 42 may include a hardened metal alloy, which may, for example, be press-fitted to the housing 8. In the example shown, the second portion 40 is configured such that it extends through the inlet 10 in the first position P1. In an alternative example, the second portion 40 is configured such that it closes the inlet 10 without extending into it, whereby a surface of the second portion 40 extends radially to the outside of the fluid inlet 10 and, for example, abuts the valve seat 42. In the example shown, the fluid inlet 10 includes a constant cross-sectional area. In at least some examples, the cross-sectional area along the inlet may be non-constant, for example, the cross-sectional area may vary linearly or non-linearly, or the inlet may include a stepped configuration.

[0055] In the example shown, valve member 14 includes a fluid passage 36 configured to provide communication between fluid inlet 10 and fluid outlet 12 when valve member 14 is not in first position P1. In at least some examples, fluid communication between fluid inlet 10 and fluid outlet 12 occurs only when valve member 14 moves beyond a threshold amount from first position P1. In alternative examples, fluid passage 36 configured to provide fluid communication between fluid inlet 10 and fluid outlet 12 may be formed, for example, in valve housing 8, or alternatively, a plurality of fluid passages 36 may be formed.

[0056] The valve device 6 can include a valve stop 44, wherein the valve member 14 is configured to abut the valve stop 44 in the second position P2. In the example shown, the valve stop 44 comprises a stepped portion of the housing 8, wherein a surface extends radially inwardly so that it abuts a surface of the first portion 38 of the valve member 14 in the second position P2. The valve stop 44 can include a hardened metal alloy that can be press-fitted to the housing 8, for example. In an alternative example, the valve stop 44 can include a radially extending member, such as a flange, a protrusion, etc., configured to abut the valve member 14. Furthermore, the valve member 14 can include a radially extending member, such as a flange, a protrusion, etc., configured to abut the valve stop 44.

[0057] The valve device 6 also includes a biasing member 16 configured to bias the valve member 14 toward the first position P1. In the example shown, the biasing member 16 includes a spring, however, in at least some examples, the biasing member 16 may include an elastically deformable material, a pneumatic cylinder, a hydraulic cylinder, etc. In the example shown, the biasing member 16 is located between the valve member 14 and the fluid outlet 12. In at least some examples, the biasing member 16 may be located between any portion of the valve member 14 and any portion fixed relative to the housing 8, such as between the fluid inlet and the fluid outlet 12, or at other locations.

[0058] In at least some examples, the second position P2 can be defined by a limit of the biasing member 16 , such as, when the biasing member 16 includes a spring, a maximum compression, such as the solid height of the spring.

[0059] The valve device 6 further comprises an intermediate part 18 which is arranged displaceably along the centre axis X relative to the housing 8 and the valve part 14 .

[0060] In the illustrated example, intermediate component 18 is an annular component. Furthermore, intermediate component 18 is arranged radially outside valve component 14 relative to the central axis X of housing 8. As shown, intermediate component 18 may include an intermediate member 32 and a friction member 34. In the illustrated example, friction member 34 is located between intermediate member 32 and valve component 14. In the illustrated example, friction member 34 is configured to increase the friction acting between intermediate component 18 and valve component 14. Alternatively, friction may be increased by, for example, applying a surface treatment to the surface of intermediate component 18 configured to contact valve component 14. Intermediate component 32 may be made of a relatively rigid material such as metal, plastic, or ceramic, while friction member 34 may be made of a relatively soft and / or resilient material such as PTFE (polytetrafluoroethylene) or rubber / elastomer. Furthermore, as shown, intermediate component 32 may be formed with a recess, with friction member 34 located within the recess, such that friction member 34 is fixed for axial movement with intermediate component 32, or alternatively, friction member 34 is at least partially axially movable relative to intermediate component 18. In at least some examples, the friction member 34 can be secured to the intermediate member 32 by an adhesive or the like. In the example shown, the friction member 34 is an annular member, wherein the friction member 34 is formed as a ring. The friction member 34 can include an energized resilient element configured to press the friction member 34 toward the opposing surface. The resilient element can include, for example, steel and can be formed as a spring element.

[0061] In at least some examples, fluid passages may be formed by the intermediate member 18 , wherein the fluid passages may be formed through and / or around the intermediate member 18 . Alternatively, the intermediate member 14 may be configured such that it performs a sealing function.

[0062] The valve device 6 also includes a first stop 20 and a second stop 22. The first stop 20 and / or the second stop 22 can be integrally formed with the housing 8. Alternatively, the first stop 20 and / or the second stop 22 can be fixed relative to the housing 8. In at least some examples, the axial distance between the first stop 20 and the second stop 22 can be adjustable. Adjusting the distance between the first stop 20 and the second stop 22 can include, for example, adjusting the position of the first stop 20 and / or the second stop 22. Adjusting the distance between the first stop 20 and the second stop 22 can include, for example, removing the first stop 20 and / or the second stop 22 and replacing them with elements of different sizes. The first stop 20 and / or the second stop 22 can include multiple elements that can be added or subtracted. The first stop 20 and / or the second stop 22 can include a screw mechanism or an actuator that can be manually or automatically controlled. In addition, the axial distance between the first stopper 20 and the second stopper 22 can be adjusted by adjusting the housing 8 .

[0063] The intermediate member 18 is axially movable relative to the first stop member 20 and the second stop member 22, and the valve device 6 is configured such that: the range of relative axial movement of the intermediate member 18 is determined by the distance between the intermediate member 18 and the first stop member 20 (e.g. Figure 2a and Figure 2d as shown) and the contact between the intermediate component 18 and the second stopper 22 (as shown Figure 2b and Figure 2c The range of relative axial movement is less than the maximum valve lift. The range of relative axial movement can be, for example, between 10% and 50% of the maximum valve lift. In at least some examples, the range of relative axial movement of the intermediate component 18 can be adjusted by adjusting the first stop 20 and / or the second stop 22. Furthermore, in at least some examples, the range of relative axial movement of the intermediate component 18 can be adjusted by adjusting the axial height of the intermediate component 18, where the adjustment can include, for example, removing the intermediate component 18 and replacing it with a component of a different size, including multiple components that can be added / subtracted, or an actuator that can be manually or automatically controlled.

[0064] 2A illustrates an initial condition of the valve device 6. The initial condition is configured to occur when the force applied in the axial direction to the valve component 14 (e.g., due to fluid pressure in the fluid path of the fluid control system 4) is less than the sum of the initial friction force and the force applied by the biasing member 16, and wherein the force applied in the axial direction to the valve component 14 is less than the sum of the initial friction force and the force applied by the biasing member 16 for a period of time such that the position of the valve component 14 has been properly reset.

[0065] In the example shown, an initial friction force is generated between the valve member 14 and the housing 8. In addition, an intermediate friction force is generated between the intermediate member 18 and the valve member 14.

[0066] The valve device 6 is further configured such that, during an initial axial movement of the valve member 14 from the first position P1 , the intermediate member 18 moves relative to the first stop 20 and the second stop 22 .

[0067] In the example shown, initial axial movement from the first position P1 is resisted by an initial friction force, wherein the initial friction force is less than the intermediate friction force.

[0068] In an initial condition, the valve member 14 is located in the first position P1 and the intermediate member abuts the first stop 20 .

[0069] For example, initial axial movement of the valve member 14 from the first position P1 occurs when the pressure in the fluid path is sufficient to overcome both the force applied by the biasing element 16 and the initial frictional force.

[0070] In the example shown, the intermediate component 18 moves together with the valve component 14 during the initial axial movement of the valve component 14 starting from the first position P1 .

[0071] In the example shown, the intermediate part 18 moves together with the valve part 14 until the intermediate part 18 abuts the second stop 22, as shown in FIG. Figure 2b The second stop 22 defines the limit of the range of relative axial movement of the intermediate component 18 .

[0072] The valve device 6 is further configured such that, when the intermediate component 18 reaches the limit of the range of relative axial movement, subsequent movement of the valve component 14 in the same direction as the initial axial movement is resisted at least in part by an intermediate friction force generated by the intermediate component 18. In the illustrated example, the intermediate friction force comprises friction generated between the intermediate component 18 and the valve component 14. Furthermore, in the illustrated example, the valve component 14 contacts the housing 8, such that the intermediate friction force comprises friction acting between the valve component 14 and the housing 8. By maintaining contact along the range of movement between the first position P1 and the second position P2, the valve component 14 can be guided so that it does not deviate from the central axis X. Subsequent movement occurs when the intermediate component 18 abuts the second stop 22 and when the force exerted on the valve component 14 in the axial direction (e.g., due to flow pressure in the fluid path of the fluid control system 4 and / or the inertia of the valve component) is sufficient to overcome both the force exerted by the biasing element 16 and the intermediate friction force.

[0073] During the subsequent movement, the intermediate member 18 does not move relative to the first stop 20 and the second stop 22. Thus, in the example shown, the valve member 14 moves relative to the intermediate member 18. The movement of the valve member 14 may continue until, for example, the valve member 14 abuts the valve stop 44 (e.g., Figure 2c ). The valve device 6 may be configured such that when the valve member 14 is located at the initial return position Pi (wherein the valve member 14 is displaced relative to the first position P1 at the initial return position), during the initial axial return movement of the valve member 14 toward the first position P1, the intermediate member 18 moves relative to the first stopper 20 and the second stopper 22 until reaching a limit of the range of relative axial movement.

[0074] The initial return position Pi of the valve member 14 may include any position of the valve member 14 in which the valve member 14 is displaced relative to the first position P1. In the example shown, the initial return position Pi coincides with the second position P2. In at least some examples, the initial return position Pi may be located at any position between the first position P2 and the second position P2.

[0075] Initial axial return movement of the valve member 14 toward the first position P1 occurs when the biasing force applied, for example, by the biasing element 16 is sufficient to overcome the force applied by the pressure in the fluid path and the initial frictional forces.

[0076] In the example shown, during the initial axial return movement of the valve member 14 , the intermediate member 18 moves together with the valve member 14 relative to the first stop 20 and the second stop 22 .

[0077] Furthermore, the intermediate member 18 moves together with the valve member 14 until the intermediate member 18 abuts the first stop 20. The first stop 20 defines a limit to the range of relative axial movement of the intermediate member 18.

[0078] In the illustrated example, the valve device 6 is configured such that, when the displacement between the initial return position Pi and the first position P1 is greater than the range of relative axial movement, subsequent return movement of the valve member 14 in the same direction as the initial axial return movement is resisted at least in part by an intermediate friction force generated by the intermediate member 18. In the illustrated example, the intermediate friction force comprises friction generated between the intermediate member 18 and the valve member 14. Furthermore, in the illustrated example, the valve member 14 contacts the housing 8, such that the intermediate friction force comprises friction acting between the valve member 14 and the housing 8. By maintaining contact along the range of movement between the second position P2 and the first position P1, the valve member 14 can be guided so that it does not deviate from the central axis X. Subsequent return movement occurs when the intermediate member 18 abuts the first stop 20 and when the force applied by the biasing element 16 is sufficient to overcome both the force exerted on the valve member 14 in the axial direction (e.g., due to flow pressure in the fluid path of the fluid control system 4) and the intermediate friction force.

[0079] Figure 3 An exemplary valve arrangement 6 according to an example is shown. The example shown is similar to Figures 2a to 2d The example of FIG. 1 differs in that the valve member 14 is not guided by the housing 8 , so that no friction force acts between the surface of the valve member 14 and the housing 8 .

[0080] In the example shown, the initial friction force is at least partially formed by the friction generated between the intermediate member 18 and the housing 8. In addition, the movement of the valve member 14 between the first position P1 and the second position P2 is guided by the intermediate member 18. In the example shown, the intermediate friction force is generated between the intermediate member 18 and the valve member 14. In addition, during the initial axial movement, the intermediate member is guided by the housing 8.

[0081] In at least some examples, movement of valve member 14 between first position P1 and second position P2 can be at least partially guided by housing 8 and intermediate member 18 such that both valve member 14 and intermediate member 181 contact housing 8 and generate friction therebetween.

[0082] Figure 4 An exemplary valve arrangement 6 according to an example is shown. The example shown is similar to Figure 3 The example differs in that the intermediate component 18 does not include the friction member 34 , but rather the valve component 14 includes the friction member 34 , wherein the intermediate friction force is at least partially generated by the friction member 34 .

[0083] The friction member 34 can be made of a relatively soft and / or resilient material, such as PTFE or rubber / elastomer. In addition, the valve component 14 is formed with a groove, and wherein the friction member 34 is located in the groove, so that the friction member 34 is fixed to move axially with the valve component 14, or alternatively, the friction member 34 can be at least partially axially movable relative to the valve component 14. In at least some examples, the friction member 34 can be fixed to the valve component 14 by an adhesive or the like. In the example shown, the friction member 34 is an annular member, wherein the friction member 34 is formed as a ring. The friction member 34 can include an energizing elastic element that is configured to press the friction member 34 against the opposing surface. The elastic element can include, for example, steel and can be formed as a spring element.

[0084] Alternatively, the friction may be increased by, for example, performing a surface treatment on the surface of the valve member 14 that is configured to contact the intermediate member 18 .

[0085] Figure 5 An exemplary valve arrangement 6 according to an example is shown. The example shown is similar to Figure 3 The example of is different in that the valve member 14 includes a first stopper 20 and a second stopper 22. Furthermore, an intermediate friction force is generated between the intermediate member 18 and the housing 8.

[0086] The first stop 20 and / or the second stop 22 can be integrally formed with the valve member 14. Alternatively, the first stop 20 and / or the second stop 22 can be fixed relative to the valve member 14. In at least some examples, the axial distance between the first stop 20 and the second stop 22 can be adjustable, as shown in FIG. Figures 2a to 2d In addition, the adjustment of the axial distance between the first stopper 20 and the second stopper 22 can be achieved by adjusting the valve component 14 .

[0087] In the example shown, the intermediate member 18 is axially movable relative to the first stop 20 and the second stop 22, wherein the range of relative axial movement of the intermediate member 18 is defined by the contact between the intermediate member 18 and the first stop 20 and the contact between the intermediate member 18 and the second stop 22. The range of relative axial movement is less than the maximum valve lift, for example, the range of relative axial movement can be between 10% and 50% of the maximum valve lift. In at least some examples, the range of relative axial movement of the intermediate member 18 can be adjusted by adjusting the first stop 20 and / or the second stop 22. Furthermore, in at least some examples, the range of relative axial movement of the intermediate member 18 can be adjusted by adjusting the axial height of the intermediate member 18, as shown in FIG. Figures 2a to 2d As stated.

[0088] In the example shown, an initial friction force is generated between the valve member 14 and the intermediate member 18. In addition, an intermediate friction force is generated between the intermediate member 18 and the housing 8.

[0089] In at least some examples, housing 8 may include a friction member 34 , wherein the intermediate friction force is generated at least in part by friction member 34 of housing 8 .

[0090] Alternatively, the friction may be increased by, for example, performing a surface treatment on the surface of the housing 8 that is configured to be in contact with the intermediate component 18 .

[0091] In the example shown, during the initial axial movement of the valve member 14 from the first position P1 , the valve member 14 moves relative to the intermediate member 18 and the intermediate member 18 does not move relative to the housing 8 , such that the intermediate member moves relative to the first and second stops 20 , 22 .

[0092] Furthermore, the intermediate part 18 does not move relative to the housing 8 until it abuts the second stop 22. The second stop 22 defines the limits of the range of relative axial movement of the intermediate part 18.

[0093] In the example shown, subsequent movement of the valve member 14 in the same direction as the initial axial movement is resisted by an intermediate friction force generated at least in part by the intermediate member 18 when the intermediate member 18 abuts the second stop 22 .

[0094] Furthermore, during the subsequent movement, the intermediate part 18 does not move relative to the first stop 20 and the second stop 22. Thus, in the example shown, the intermediate part 18 moves together with the valve part 14.

[0095] Figure 6 An exemplary valve arrangement 6 according to an example is shown. The example shown is similar to Figure 3 The example differs in that the intermediate member 18 is arranged radially inside the valve member 14 relative to the central axis X of the housing 8. In addition, the housing 8 includes a fluid channel 36 configured for communication between the fluid inlet 10 and the fluid outlet 12 when the valve member 14 is not in the first position P2.

[0096] In the example shown, the housing 8 includes a shaft 46. The housing 8 can be integrally formed with the shaft 46. Alternatively, the housing 8 can include multiple parts, with the shaft 46 comprising one of these parts, and the multiple parts can be configured to be fixed at least in position relative to each other. For example, the parts of the housing 8 can be connected together, or alternatively, the parts of the housing 8 can be fixed by being connected to the same element (e.g., a bracket, etc.). The shaft 46 extends along the central axis X. The housing 8 can include metal (such as aluminum, stainless steel, etc.) or plastic, or a combination thereof.

[0097] In the example shown, the intermediate member 18 is movably arranged relative to the housing 8 and the valve member 14 along the shaft 46. In the example shown, the valve member 14 is supported solely by the intermediate member 18, and in at least some examples, the valve member 14 can be at least partially guided by the shaft 46 on a radially inwardly facing surface and / or by the housing 8 on a radially outwardly facing surface.

[0098] In the example shown, the intermediate component 18 includes an annular member that is arranged radially outside the shaft 46 relative to the central axis X of the housing 8. Furthermore, the intermediate component 18 includes an intermediate member 32 and a friction member 34, wherein the intermediate friction force is at least partially generated by the friction member 34. In the example shown, the friction member 34 is located between the intermediate member 32 and the valve component 14. In the example shown, the friction member 34 is configured to increase the friction force acting between the intermediate component 18 and the valve component 14.

[0099] In the example shown, the valve device 6 also includes a first stop 20 and a second stop 22. The first stop 20 and / or the second stop 22 can be formed integrally with the shaft 46. Alternatively, the first stop 20 and / or the second stop 22 can be fixed relative to the shaft 46. In at least some examples, the axial distance between the first stop 20 and the second stop 22 can be adjustable, as shown in FIG. Figures 2a to 2d In addition, the axial distance between the first stopper 20 and the second stopper 22 can be adjusted by adjusting the shaft 46 .

[0100] In the example shown, first stop 20, second stop 22, and intermediate member 18 are positioned within first portion 38 of valve member 14, where first portion 38 is positioned between biasing element 16 and fluid inlet 10, and between fluid outlet 12 and fluid inlet 10. In at least some examples, a portion of valve member 14 can extend beyond biasing element 16 and / or fluid outlet 12 such that first stop 20, second stop 22, and intermediate member 18 can be positioned beyond biasing element 16 and / or fluid outlet 12.

[0101] In the example shown, the intermediate member 18 is axially movable relative to the first stop 20 and the second stop 22, wherein the range of relative axial movement of the intermediate member 18 is defined by the contact between the intermediate member 18 and the first stop 20 and the contact between the intermediate member 18 and the second stop 22. The range of relative axial movement is less than the maximum valve lift, for example, the range of relative axial movement can be between 10% and 50% of the maximum valve lift. In at least some examples, the range of relative axial movement of the intermediate member 18 can be adjusted by adjusting the first stop 20 and / or the second stop. Furthermore, in at least some examples, the range of relative axial movement of the intermediate member 18 can be adjusted by adjusting the axial height of the intermediate member 18, as shown in FIG. Figures 2a to 2d As stated.

[0102] In the example shown, movement of the valve member 14 between the first position P1 and the second position P2 is guided by the intermediate member 18. During initial axial movement, the intermediate member 18 is guided by the shaft 46, so that an initial friction force is generated between the intermediate member 18 and the shaft 46. During subsequent movement, the intermediate member 18 remains in contact with the shaft 46, and the valve member 14 is guided by the intermediate member 18.

[0103] In the example shown, housing 8 includes a fluid passage 36 configured to provide communication between fluid inlet 10 and fluid outlet 12 when valve member 14 is not in first position P2. Fluid passage 36 is formed between housing 8 and valve member 14. In at least some examples, fluid passage 36 can be formed at least partially through the housing in a channel specifically formed to facilitate fluid flow.

[0104] Figure 7 An exemplary valve arrangement 6 according to an example is shown. The example shown is similar to Figure 6 The example of FIG. 1 is different in that the valve member 14 includes the first stopper 20 and the second stopper 22. In addition, an intermediate friction force is generated between the intermediate member 18 and the shaft 46.

[0105] The first stop 20 and / or the second stop 22 can be integrally formed with the valve member 14. Alternatively, the first stop 20 and / or the second stop 22 can be fixed relative to the valve member 14. In at least some examples, the axial distance between the first stop 20 and the second stop 22 can be adjustable.

[0106] In the example shown, the intermediate component 18 is axially movable relative to the first stop 20 and the second stop 22, wherein the range of relative axial movement of the intermediate component 18 is defined by contact between the intermediate component 18 and the first stop 20 and between the intermediate component 18 and the second stop 22. The range of relative axial movement is less than the maximum valve lift.

[0107] In the example shown, the initial friction force is generated between the valve member 14 and the intermediate member 18. In addition, the intermediate friction force is generated between the intermediate member 18 and the shaft 46.

[0108] In at least some examples, shaft 46 may include a friction member, wherein the intermediate friction force is generated at least in part by the friction member of shaft 46 .

[0109] In the example shown, during initial axial movement of the valve member 14 from the first position P1 , the valve member 14 moves relative to the intermediate member 18 and the intermediate member 18 does not move relative to the shaft 46 , such that the intermediate member moves relative to the first and second stops 20 , 22 .

[0110] Furthermore, the intermediate component 18 does not move relative to the shaft 46 until the intermediate component 18 abuts the second stop 22. The second stop 22 defines a limit to the range of relative axial movement of the intermediate component 18.

[0111] In the example shown, subsequent movement of the valve member 14 in the same direction as the initial axial movement is resisted by an intermediate friction force generated at least in part by the intermediate member 18 when the intermediate member 18 abuts the second stop 22 .

[0112] Furthermore, during the subsequent movement, the intermediate part 18 does not move relative to the first stop 20 and the second stop 22. Thus, in the example shown, the intermediate part 18 moves together with the valve part 14.

[0113] Figure 8 Based on the example Figure 1Another view of FIG. In the illustrated example, a valve device 6 for a fluid control system 4 includes a housing 8 including a fluid inlet 10 and a fluid outlet 12, the housing 8 extending along a central axis X. The valve device 6 also includes a valve member 14 movably arranged relative to the housing 8 along the central axis X between a first position P1 and a second position P2. In the first position P1, the fluid inlet 10 is closed by the valve member 14, and a maximum valve lift is defined between the first position P1 and the second position P2. The valve device 6 also includes a biasing member 16 configured to bias the valve member 14 toward the first position P1, and an intermediate member 18 movably arranged relative to the housing 8 and the valve member 14 along the central axis X. The valve device 6 also includes a first stop 20 and a second stop 22. The intermediate member 18 is axially movable relative to the first stop 20 and the second stop 22. The valve device 6 is configured such that the range of relative axial movement is defined by contact between the intermediate component 18 and the first stop 20 and between the intermediate component 18 and the second stop 22, wherein the range of relative axial movement is less than the maximum valve lift, and such that: during the initial axial movement of the valve component 14 from the first position P1, the intermediate component 18 moves relative to the first stop 20 and the second stop 22, and when the intermediate component 18 reaches the limit of the range of relative axial movement, subsequent movement of the valve component 14 in the same direction as the initial axial movement is resisted by an intermediate friction force at least partially generated by the intermediate component 18.

[0114] In the following, possible features and feature combinations of the present disclosure are presented as a series of examples.

[0115] Example 1: A valve device 6 for a fluid control system 4 includes a housing 8 including a fluid inlet 10 and a fluid outlet 12, the housing 8 extending along a central axis X. The valve device 6 also includes a valve member 14 movably arranged relative to the housing 8 along the central axis X between a first position P1 and a second position P2, wherein in the first position P1, the fluid inlet 10 is closed by the valve member 14, and wherein a maximum valve lift is defined between the first position P1 and the second position P2. The valve device 6 also includes a biasing member 16 configured to bias the valve member 14 toward the first position P1, and an intermediate member 18 movably arranged relative to the housing 8 and the valve member 14 along the central axis X. The valve device 6 also includes a first stopper 20 and a second stopper 22. The intermediate member 18 is axially movable relative to the first stopper 20 and the second stopper 22. The valve device 6 is configured such that the range of relative axial movement is defined by contact between the intermediate component 18 and the first stop 20 and between the intermediate component 18 and the second stop 22, wherein the range of relative axial movement is less than the maximum valve lift, and such that: during the initial axial movement of the valve component 14 from the first position P1, the intermediate component 18 moves relative to the first stop 20 and the second stop 22, and when the intermediate component 18 reaches the limit of the range of relative axial movement, subsequent movement of the valve component 14 in the same direction as the initial axial movement is resisted by an intermediate friction force at least partially generated by the intermediate component 18.

[0116] Example 2: The valve device 6 of Example 1, wherein the initial axial movement is resisted by an initial friction force, and wherein the initial friction force is less than the intermediate friction force.

[0117] Example 3: The valve device 6 according to Example 2, wherein the initial friction force is at least partially formed by friction generated between the valve component 14 and the housing 8.

[0118] Example 4: The valve device 6 according to any one of Examples 2 to 3, wherein the initial friction force is at least partially formed by friction generated between the intermediate component 18 and the housing 8.

[0119] Example 5: The valve device 6 according to any one of the preceding examples, wherein the intermediate friction force is generated between the intermediate component 18 and the valve component 14 .

[0120] Example 6: The valve device 6 according to any one of Examples 1 to 3, wherein the intermediate friction force is generated between the intermediate component 18 and the housing 8 .

[0121] Example 7: The valve device 6 according to any one of the preceding examples, wherein the intermediate component 18 includes an intermediate member 32 and a friction member 34 , wherein the intermediate friction force is at least partially generated by the friction member 34 .

[0122] Example 8: The valve device 6 according to Example 5, wherein the valve component 18 includes a friction member 34 , wherein the intermediate friction force is at least partially generated by the friction member 34 .

[0123] Example 9: The valve device 6 according to Example 6, wherein the housing 8 includes a friction member 34 , wherein the intermediate friction force is at least partially generated by the friction member 34 .

[0124] Example 10: The valve device 6 according to any one of Examples 7 to 9, wherein the intermediate member 32 is made of a relatively rigid material, such as metal / plastic / ceramic, and the friction member 34 is made of a relatively soft and / or elastic material, such as PTFE or rubber / elastomer.

[0125] Example 11: The valve device 6 according to Example 10, wherein the friction member 34 includes an energizing elastic element configured to press the friction member 34 toward an opposing surface.

[0126] Example 12: The valve device 6 according to any one of Examples 7 to 11, wherein the friction member 34 is an annular member.

[0127] Example 13: The valve device 6 according to any of the preceding examples, wherein the intermediate component 18 is an annular component.

[0128] Example 14: The valve device 6 according to any of the preceding examples, wherein the intermediate component 18 is arranged radially inside the valve component 14 relative to the central axis X of the housing 8 .

[0129] Example 15: The valve device 6 according to any of Examples 1 to 13, wherein the intermediate component 18 is arranged radially outside the valve component 14 relative to the central axis X of the housing 8.

[0130] Example 16: The valve device 6 according to any of the preceding examples, wherein the valve member 14 comprises a fluid channel 36 configured for communication between the fluid inlet 10 and the fluid outlet 12 when the valve member 14 is not in the first position P1.

[0131] Example 17: The valve device 6 according to any of the preceding examples, wherein the housing 8 comprises a fluid passage 36 configured for communication between the fluid inlet 10 and the fluid outlet 12 when the valve member 14 is not in the first position P2.

[0132] Example 18: The valve device 6 according to any of the preceding examples, wherein the axial distance between the first stop 20 and the second stop 22 is adjustable.

[0133] Example 19: According to the valve device 6 described in any one of the aforementioned examples, the valve device is configured so that when the valve part 14 is located at the initial return position Pi (wherein at the initial return position Pi, the valve part 14 is displaced relative to the first position P1), during the initial axial return movement of the valve part 14 toward the first position P1, the intermediate part 18 moves relative to the first stop 20 and the second stop 22 until the limit of the range of the relative axial movement is reached.

[0134] Example 20: A vehicle 2 comprising a valve device 6 according to any one of Examples 1 to 19.

[0135] The terms used herein are for the purpose of describing specific aspects only and are not intended to limit the present disclosure. As used herein, the singular forms "a", "an", and "said" are intended to include the plural forms as well, unless the context clearly indicates otherwise. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items. It should also be understood that the terms "include" and / or "comprising" when used herein indicate the presence of stated features, integers, actions, steps, operations, elements, and / or parts, but do not exclude the presence or addition of one or more other features, integers, actions, steps, operations, elements, parts, and / or groups thereof.

[0136] It should be understood that although the terms first, second, etc. may be used to describe various elements in this article, these elements should not be limited by these terms. These terms are only used to distinguish one element from another element. For example, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element without departing from the scope of this disclosure.

[0137] Relative terms such as "below" or "above" or "upper" or "lower" or "horizontal" or "vertical" may be used herein to describe the relationship of one element to another, as shown in the figures. It should be understood that these terms and those discussed above are intended to encompass different device orientations in addition to the orientations depicted in the figures. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, the element can be directly connected or directly coupled to the other element, or intervening elements may be present. In contrast, when an element is referred to as being "directly connected" or "directly coupled" to another element, there are no intervening elements.

[0138] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. It should also be understood that, unless otherwise explicitly defined herein, the terms used herein should be interpreted as having the same meaning as in the context of this specification and the relevant art, and should not be interpreted in an idealized or overly formal sense.

[0139] It should be understood that the present disclosure is not limited to the aspects described above and shown in the accompanying drawings; rather, the skilled person will recognize that many changes and modifications may be made within the scope of the present disclosure and the appended claims. In the drawings and description, various aspects have been disclosed for illustrative purposes only and not for purposes of limitation, the scope of the disclosure being set forth in the appended claims.

Claims

1. A valve device (6) for a fluid control system (4), comprising: - a housing (8), comprising a fluid inlet (10) and a fluid outlet (12), said housing (8) extending along a central axis (X), - a valve member (14) movably arranged relative to the housing (8) along the central axis (X) between a first position (P1) and a second position (P2), wherein in the first position (P1) the fluid inlet (10) is closed by the valve member (14), and wherein a maximum valve lift is defined between the first position (P1) and the second position (P2), - a biasing member (16) configured to bias the valve member (14) towards the first position (P1), - an intermediate part (18) arranged movably along the central axis (X) relative to the housing (8) and the valve part (14), - a first stop (20) and a second stop (22), wherein the intermediate component (18) is axially movable relative to the first stop (20) and the second stop (22), and wherein the valve device (6) is configured such that: The range of relative axial movement is defined by contact between the intermediate component (18) and the first stop (20) and between the intermediate component (18) and the second stop (22), wherein the range of relative axial movement is less than the maximum valve lift and such that: During initial axial movement of the valve member (14) from the first position (P1), the intermediate member (18) moves relative to the first stop (20) and the second stop (22), and when the intermediate member (18) reaches the limit of the range of the relative axial movement, subsequent movement of the valve member (14) in the same direction as the initial axial movement is resisted by an intermediate friction force generated at least in part by the intermediate member (18).

2. The valve device (6) according to claim 1, wherein the initial axial movement is resisted by an initial friction force, and wherein the initial friction force is less than the intermediate friction force.

3. The valve device (6) according to claim 2, wherein the initial friction force is at least partially formed by friction generated between the valve member (14) and the housing (8).

4. The valve device (6) according to any one of claims 2 to 3, wherein the initial friction force is at least partially formed by friction generated between the intermediate component (18) and the housing (8).

5. The valve device (6) according to any one of the preceding claims, wherein the intermediate friction force is generated between the intermediate member (18) and the valve member (14).

6. The valve device (6) according to any one of claims 1 to 3, wherein the intermediate friction force is generated between the intermediate component (18) and the housing (8).

7. The valve device (6) according to any one of the preceding claims, wherein the intermediate component (18) comprises an intermediate member (32) and a friction member (34), wherein the intermediate friction force is at least partially generated by the friction member (34).

8. The valve device (6) according to claim 5, wherein the valve component (18) comprises a friction member (34), wherein the intermediate friction force is at least partially generated by the friction member (34).

9. The valve device (6) according to claim 6, wherein the housing (8) comprises a friction member (34), wherein the intermediate friction force is at least partially generated by the friction member (34).

10. The valve device (6) according to any one of claims 7 to 9, wherein the intermediate member (32) is made of a relatively rigid material, such as metal / plastic / ceramic, and the friction member (34) is made of a relatively soft and / or elastic material, such as PTFE or rubber / elastomer.

11. The valve device (6) according to any one of claims 7 to 10, wherein the friction member (34) is an annular member.

12. Valve device (6) according to any one of the preceding claims, wherein the intermediate component (18) is an annular component.

13. The valve device (6) according to any of the preceding claims, wherein the intermediate member (18) is arranged radially inside the valve member (14) with respect to the centre axis (X) of the housing (8).

14. The valve device (6) according to any one of claims 1 to 12, wherein the intermediate member (18) is arranged radially outside the valve member (14) with respect to the center axis (X) of the housing (8).

15. A vehicle (2) comprising a valve device (6) according to any one of claims 1 to 14.

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