CN114719060A - Combination valve and displacement regulating system - Google Patents

Abstract

The present application relates to the field of vehicle components, and more particularly, to a combination valve and displacement adjustment system. The combination valve comprises an accommodating portion and a valve core assembly, the accommodating portion is used for accommodating a cavity of the valve core assembly, the valve core assembly comprises a first valve core and a second valve core, a first space is formed between the first valve core and a first end, a second space is formed between the first valve core and the second valve core, a third space is formed inside the first valve core, the first space is communicated with the third space, a second hole enabling the second space to be communicated with the outside and a first hole enabling the first space to be communicated with the outside are formed in the outer side portion of the accommodating portion, the valve core assembly can move to a preset position from an initial position at the valve core assembly, and the first hole is communicated with the second hole through the first space and the third space. According to the combination valve and the displacement adjusting system, the problems that when the output pressure is adjusted through the variable oil pump in the prior art, the response speed is low, and the output pressure curve is difficult to meet the requirement of an engine are solved.

Description

Combination valve and displacement regulating system

Technical Field

The present application relates to the field of vehicle components, and more particularly, to a combination valve and displacement adjustment system.

Background

The oil pump continuously provides pressure lubricating oil for each friction part of the whole engine. If the oil supply quantity of the oil pump is insufficient, the engine lacks enough lubricating pressure, and the engine is seriously abraded. However, if the oil supply is kept very high all the time, the internal loss of the engine is increased, and unnecessary waste is caused.

In the prior art, the variable displacement oil pump is used for solving the problems, and the variable displacement oil pump can adjust the oil discharge amount of the variable displacement oil pump according to the rotating speed of an engine and the feedback oil pressure of a lubricating system. Taking the displacement-adjustable vane oil pump as an example, when the feedback oil pressure reaches a preset pressure value, a spring arranged in the vane oil pump is compressed to force an adjusting ring to swing, so that the eccentric value of a rotor and the adjusting ring is reduced, the variation of a pressure oil cavity formed by a vane and a cavity in the running process of the oil pump is reduced, the pumped oil flow of the oil pump is also reduced, when the feedback oil pressure is reduced, the spring is gradually returned to reset the adjusting ring, but only through the variable oil pump, the pressure curve output by the variable oil pump is difficult to ensure to adapt to the requirement of an engine, and the condition of sudden change of the output pressure is easy to occur.

Disclosure of Invention

The purpose of the application is to provide a combination valve and a displacement adjusting system, so that the problems that when the output pressure is adjusted through a variable oil pump in the prior art, the response speed is low, and the output pressure curve is difficult to be ensured to adapt to the requirements of an engine are solved.

According to a first aspect of the present application, there is provided a combination valve, which includes a housing portion and a valve core assembly, the housing portion is formed with a cavity for housing the valve core assembly, the housing portion has an extending direction, the housing portion includes a first end and a second end in the extending direction, the valve core assembly includes a first valve core and a second valve core, the first valve core and the first end are formed with a first space, a second space is formed between the first valve core and the second valve core, a third space is formed inside the first valve core, the first space is communicated with the third space, the housing portion is formed with a second hole communicating the second space with an outside of the housing portion and a first hole communicating the first space with the outside of the housing portion, the first valve core is located at an initial position in an initial state, in the initial state, the first bore is disconnected from the second bore, in the first state of the valve core assembly, the first valve core is movable from the initial position to a predetermined position, and in the first state of the valve core assembly, the first bore is communicated with the second bore via the first space and the third space.

In any of the above technical solutions, further, a medium can sequentially enter the first space and the third space through the first hole, so that the valve core assembly is switched from the initial state to the first state.

In any of the above technical solutions, further, the accommodating portion is formed with a third hole that communicates the second space with an outside of the accommodating portion, the second valve element is disposed at the second end, the fourth hole is disposed at the second end when the valve element assembly is in the initial state, a medium can sequentially enter the first space and the third space through the first hole when the valve element assembly is in the second state, so that the first valve element moves toward the second end, the medium can enter the cavity from the fourth hole, so that the second valve element moves toward the first end, and when the first valve element moves to a predetermined position, the first hole communicates with the second hole through the first space and the third space.

In any of the above technical solutions, further, the valve core assembly moves in a first posture in the first state, and moves in a second posture in the second state, when the valve core assembly moves in the first posture, only the first valve core moves, and when the valve core assembly moves in the second posture, both the first valve core and the second valve core move.

In any of the above technical solutions, further, a stopper portion for restricting further movement of the first valve element toward the first end is formed on an inner side portion of the accommodating portion, and the first space in the initial state is defined between the inner side portion of the first end, the inner side portion of the stopper portion, and the first valve element.

In any of the above-described aspects, further, the second valve body is formed into a cylinder, an outer side portion of the second valve body is attached to an inner side portion of the accommodating portion, a side of the second valve body facing the first end is open, the first valve body includes a first convex portion, a concave portion, and a second convex portion connected to each other, outer side portions of the first convex portion and the second convex portion are both attached to the inner side portion of the accommodating portion, the outer side portion of the concave portion, the inner side portion of the accommodating portion, and two side portions of the first convex portion and the second convex portion facing each other define an annular space, the third space includes a long hole opened in the first valve body, and the long hole communicates with the annular space.

In any of the above technical solutions, further, the first valve spool further includes a first step portion and a second step portion, the second protrusion, the first step and the second step are connected in sequence and are away from the first end in sequence, the second space is defined by the side of the first protrusion facing the second end, the side of the first step facing the second end, the side of the second valve core and the inner side of the accommodating part, a resetting component is arranged between the second step part and the inner side part of the second valve core and is used for generating the trend of moving the first valve core and the second valve core away from each other, such that the spool assembly is resettable from the first and second states to the initial state.

According to a second aspect of the present application there is provided a displacement regulating system comprising a combination valve as described above.

In any of the above solutions, further, the displacement adjustment system is used for adjusting the displacement of the medium output to the device to be supplied, and the displacement adjustment system further includes: a control valve; a variable displacement pump formed with a regulation chamber, an input chamber, and an output chamber, the pressure of a medium output from the output chamber being reduced when the pressure of the medium in the regulation chamber is increased; a media source for providing and receiving the media; the medium flows from the medium source into the input chamber via a first channel and flows from the output chamber into the device to be supplied via a second channel at a higher pressure, the medium in the device to be supplied flowing into the medium source via a third channel; the conditioning chamber is in communication with the second space via a fourth channel and the second orifice in sequence; the second space is in communication with the media source via the third aperture and a fifth channel in sequence; the second passage communicates with the first bore via a sixth passage; the fourth orifice communicates with the control valve through a seventh passage such that when the control valve is in the first control position, the seventh passage communicates with the second passage via a ninth passage, and such that when the control valve is in the second control position, the seventh passage communicates with the media source via an eighth passage.

In any of the above technical solutions, further, the second passage further communicates with the medium source via a tenth passage, a relief valve is provided on the tenth passage, the relief valve opens the tenth passage when the medium in the second passage exceeds a relief pressure, a filter member is further provided on the second passage, the control valve is formed as an electromagnetic valve, the medium is formed as engine oil, the medium source is formed as an engine oil pan, the apparatus to be supplied is formed as an engine, and the variable pump is formed as a vane oil pump.

The combination valve comprises an accommodating part and a valve core assembly, wherein the accommodating part is provided with a cavity for accommodating the valve core assembly, the accommodating part has an extending direction, the accommodating part comprises a first end and a second end in the extending direction, the valve core assembly comprises a first valve core and a second valve core, a first space is formed between the first valve core and the first end, a second space is formed between the first valve core and the second valve core, a third space is formed inside the first valve core, the first space is communicated with the third space, a second hole for communicating the second space with the outside and a first hole for communicating the first space with the outside are formed outside the accommodating part, the first valve core is located at an initial position when in the initial state, the first valve core can move to a preset position from the initial position when in the first state, when the valve core assembly moves to the preset position, the first hole communicates with the second hole via the first space and the third space. The application provides a combination valve is applied to displacement governing system and passes through the cooperation control of control valve and combination valve, has realized adjusting the second grade of the discharge capacity of variable pump, and is fast than traditional two regulation chamber variable pump response speed, and variable control is steady. In addition, the pressure curve output by the displacement adjusting system is more suitable for the requirement of an engine, and the output curve of the variable pump under high-pressure control is ensured to be stable, so that the technical problems that the pressure curve output by the variable oil pump is difficult to ensure to adapt to the requirement of the engine and the output pressure is easy to change suddenly only through the variable oil pump and the response speed is relatively slow when the output pressure is adjusted by only relying on the variable oil pump for feeding back the oil pressure are solved to a certain extent.

In order to make the aforementioned objects, features and advantages of the present application comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

FIG. 1 illustrates a schematic diagram of a displacement regulating system with a combination valve in an initial state according to an embodiment of the present application;

FIG. 2 illustrates a schematic diagram of a displacement modulation system according to an embodiment of the present application with a combining valve in a second state;

FIG. 3 illustrates a schematic diagram of a displacement modulation system according to an embodiment of the present application with a combining valve in a first state;

FIG. 4 shows a schematic structural diagram of a combination valve according to an embodiment of the present application.

Icon: 100-variable vane pump; 110-an adjusting ring spring; 210-an adjustment ring; 220-blade; 230-a rotor; 2-a filter; 3-an electromagnetic valve; 4-a fifth channel; 5-an oil pan; 6-an engine; 11-a first channel; 11 a-an input chamber; 12-a second channel; 12 a-an output chamber; 13-a fourth channel; 13 a-a conditioning chamber; 14-a safety valve; 151-first spool; 152-a second spool; 152 a-long hole; 155-a reduction member; 156-a first space; 153-third space; 15 a-a fourth well; 15 b-a second well; 15 c-a first well; 15 d-a third aperture; 16-a lubrication channel; 17-a first step; 18-a second step portion; 19-a first projection; 20-a second projection; 21-a recess; 25-a third channel; 26-a sixth channel; 27-a seventh channel; 28-eighth channel; 29-ninth channel; 30-tenth channel.

Detailed Description

The following detailed description is provided to assist the reader in obtaining a thorough understanding of the methods, devices, and/or systems described herein. However, various changes, modifications, and equivalents of the methods, apparatus, and/or systems described herein will be apparent to those skilled in the art in view of the disclosure of the present application. For example, the order of operations described herein is merely an example, which is not limited to the order set forth herein, but rather, variations may be made in addition to operations which must occur in a particular order, which will be apparent upon understanding the disclosure of the present application. Moreover, descriptions of features known in the art may be omitted for the sake of clarity and conciseness.

The features described herein may be embodied in different forms and should not be construed as limited to the examples described herein. Rather, the examples described herein have been provided merely to illustrate some of the many possible ways to implement the methods, devices, and/or systems described herein that will be apparent after understanding the disclosure of the present application.

Throughout the specification, when an element (such as a layer, region, or substrate) is described as being "on," "connected to," coupled to, "over," or "overlying" another element, it may be directly "on," "connected to," coupled to, "over," or "overlying" the other element, or one or more other elements may be present therebetween. In contrast, when an element is referred to as being "directly on," "directly connected to," directly coupled to, "directly over" or "directly overlying" another element, there may be no intervening elements present.

As used herein, the term "and/or" includes any one of the associated listed items and any combination of any two or more of the items.

Although terms such as "first", "second", and "third" may be used herein to describe various elements, components, regions, layers or sections, these elements, components, regions, layers or sections should not be limited by these terms. Rather, these terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, a first element, component, region, layer or section referred to in the examples described herein may be termed a second element, component, region, layer or section without departing from the teachings of the examples.

For ease of description, spatial relationship terms such as "above … …," "upper," "below … …," and "lower" may be used herein to describe one element's relationship to another element as illustrated in the figures. Such spatial relationship terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "upper" relative to other elements would then be oriented "below" or "lower" relative to the other elements. Thus, the term "above … …" includes both an orientation of "above … …" and "below … …" depending on the spatial orientation of the device. The device may also be otherwise oriented (e.g., rotated 90 degrees or at other orientations) and the spatially relative terms used herein should be interpreted accordingly.

The terminology used herein is for the purpose of describing various examples only and is not intended to be limiting of the disclosure. The singular forms also are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," and "having" specify the presence of stated features, quantities, operations, elements, components, and/or combinations thereof, but do not preclude the presence or addition of one or more other features, quantities, operations, components, elements, and/or combinations thereof.

Variations from the shapes of the illustrations as a result, for example, of manufacturing techniques and/or tolerances, may be expected. Thus, the examples described herein are not limited to the particular shapes shown in the drawings, but include changes in shape that occur during manufacturing.

The features of the examples described herein may be combined in various ways that will be apparent after understanding the disclosure of the present application. Further, while the examples described herein have a variety of configurations, other configurations are possible, as will be apparent after understanding the disclosure of the present application.

The first aspect of the application provides a combination valve, and solves the problems that when the output pressure is regulated through a variable oil pump in the prior art, the response speed is low, and it is difficult to ensure that an output pressure curve is adapted to the requirements of an engine.

Before the application is provided, when the feedback oil pressure reaches a preset pressure value, a spring arranged in the vane oil pump is compressed to force an adjusting ring to swing, so that the eccentric value of a rotor and the adjusting ring is reduced, the variation of a pressure oil cavity formed by a vane and a cavity in the operation process of the oil pump is reduced, and the oil pumping flow of the oil pump is reduced; when the feedback oil pressure is reduced, the spring gradually returns to reset the adjusting ring, but the pressure curve output by the variable oil pump is difficult to ensure to adapt to the requirement of the engine only through the variable oil pump, the condition of sudden change of the output pressure is easy to occur, and in addition, when the output pressure is adjusted by only the variable oil pump aiming at the feedback oil pressure, the response speed is relatively slow.

In view of this, according to a first aspect of the present application, there is provided a combination valve including a housing portion and a spool assembly, wherein the housing portion is formed with a cavity for housing the spool assembly, the housing portion has an extending direction, the housing portion includes a first end and a second end in the extending direction, the spool assembly includes a first spool 151 and a second spool 152, a first space 156 is formed between the first spool 151 and the first end, a second space is formed between the first spool 151 and the second spool 152, a third space 153 is formed inside the first spool 151, the first space 156 communicates with the third space 153, a second hole 15b that communicates the second space with the outside and a first hole 15c that communicates the first space 156 with the outside are formed at an outer side of the housing portion, the first spool is located at an initial position when the first spool is in the initial state, and the first spool is movable from the initial position to a predetermined position when the first spool is in the first state, when the first spool moves to a predetermined position, the first orifice 15c communicates with the second orifice 15b via the first space 156 and the third space 153, and the specific structure and operation of the combination valve will be described in detail below.

In the embodiment of the present application, the medium can sequentially enter the first space 156 and the third space 153 via the first hole 15c, so that the spool assembly is switched from the initial state to the first state.

Further, the outer side portion of the accommodating portion may be formed with a third hole 15d and a fourth hole 15a which communicate the second space with the outside, the second spool 152 may be disposed at the second end of the accommodating portion, and the fourth hole 15a may be opened at the second end of the accommodating portion in the first state of the spool assembly, and in the second state of the spool assembly, the medium may sequentially enter the first space 156 and the third space 153 via the first hole 15c, and the first spool 151 may be moved toward the second end, and the medium may simultaneously enter the cavity from the fourth hole 15a, and the second spool 152 may be moved toward the first end, and when the first spool is moved to a predetermined position, the first hole 15c may communicate with the second hole 15b via the first space 156 and the third space 153.

In the embodiment of the present application, the spool assembly moves in the first posture in the first state, moves in the second posture in the second state, and when the spool assembly moves in the first posture, only the first spool 151 moves, and when the spool assembly moves in the second posture, the first spool 151 and the second spool 152 move together, and the first state will be described in detail as a low pressure state and the second state as a high pressure state hereinafter.

Further, as shown in fig. 1 to 3, the inner side portion of the receiving portion may be formed with a stopper portion for restricting further movement of the first valve spool 151 toward the first end of the receiving portion, wherein the first space 156 in the initial state is defined between the inner side portion of the first end of the receiving portion, the inner side portion of the stopper portion, and the first valve spool 151.

Further, as shown in fig. 1 to 4, the second valve body 152 may be formed in a cylindrical shape, an outer side portion of the second valve body 152 is fitted to an inner side portion of the receiving portion, a side of the second valve body 152 facing the first end is open, the first valve body 151 includes a first protrusion 19, a recess 21, and a second protrusion 20 connected to each other, outer side portions of the first protrusion 19 and the second protrusion 20 are each fitted to an inner side portion of the receiving portion, the outer side portion of the recess 21, the inner side portion of the receiving portion, and both side portions of the first protrusion 19 and the second protrusion 20 facing each other define an annular space, a long hole 152a may be opened in the first valve body 151, the long hole 152a communicates with the annular space, and the third space 153 includes a long hole 152a opened in the first valve body.

In an embodiment of the present application, as shown in fig. 1 to 4, the first valve spool 151 may further include a first step portion 17 and a second step portion 18, the second protrusion 20, the first step portion 17, and the second step portion 18 are sequentially connected and away from the first end, a second space is defined by a side portion of the first protrusion 19 facing the second end, a side portion of the first step portion 17 facing the second end, a side portion of the second step portion 18 facing the second end, a side of the second valve spool 152, and an inner side portion of the receiving portion, a reset member 155 is disposed between the second step portion 18 and the inner side portion of the second valve spool 152, the reset member 155 is configured to generate a movement tendency of the first valve spool 151 and the second valve spool 152, so that the valve spool assembly can be reset from the first state and the second state to the initial state, where the reset member 155 may be a spring.

According to a second aspect of the present application there is provided a displacement regulating system comprising a combination valve as described above, the displacement regulating system being for regulating the displacement of medium output to a device to be supplied.

In an embodiment of the application, as shown in fig. 1 to 3, the displacement adjustment system further comprises: a control valve; a variable displacement pump formed with a regulation chamber 13a, an input chamber 11a, and an output chamber 12a, the pressure of the medium output from the output chamber being decreased when the pressure of the medium in the regulation chamber 13a is increased; a media source for providing and receiving media; medium flows from the medium source into the input chamber 11a via the first channel 11 and flows from the output chamber 12a into the device to be supplied via the second channel 12 at a higher pressure, and medium in the device to be supplied flows into the medium source via the third channel 25; the regulation chamber 13a communicates with the second space via the fourth passage 13 and the second hole 15b in this order; the second space is in communication with a media source via a third aperture 15d and a fifth channel 4 in sequence; the second passage 12 communicates with the first hole 15c via a sixth passage; the fourth bore 15a communicates with the control valve via a seventh channel 27, so that the seventh channel 27 communicates with said second channel 12 via a ninth channel 29 when the control valve is in the first control position, and so that the seventh channel communicates with the medium source via an eighth channel 28 when the control valve is in the second control position.

Furthermore, the second channel 12 is also in communication with a medium source via a tenth channel 30, a safety valve 14 being arranged on the tenth channel 30, the safety valve 14 opening said tenth channel 30 when the medium in the second channel 12 exceeds a safety pressure, and a filter member being arranged on the second channel 12, wherein the medium source may be formed as a sump 5, the device to be fed may be formed as an engine 6 and the variable displacement pump may be formed as a vane oil pump.

In an embodiment, the variable displacement pump may be formed as a prior art variable displacement vane pump 100, which includes a rotor 230, the rotor 230 is provided with vanes 220 in a circumferential direction, an outer side of the vanes 220 is surrounded by an adjusting ring 210, and the adjusting ring 210 is arranged eccentrically to the rotor 230. The left side of the adjustment ring 210 may be pivotally connected to the pump body of the variable capacity vane pump 100 so as to be able to swing in the plane of the paper, this swinging movement being limited by the adjustment ring spring 110.

Based on the above arrangement, the operation of the displacement adjustment system and the operation state of the combination valve during this process will be described in detail below.

When the combination valve is in an initial state, as shown in fig. 1, the first valve core 151 is in abutting engagement with the stopper portion, and the second valve core 152 is attached to the second end of the accommodating portion. In this case, the pressure oil outputted from the regulation chamber 13a of the variable vane pump 100 flows into the second space of the combination valve via the fourth passage 13 and the second orifice 15b, and the oil in the second space flows into the oil pan 5 via the third orifice 15d and the fifth passage 4, that is, the pressure oil equivalent to the pressure oil outputted from the regulation chamber 13a flows back into the oil pan 5 which is close to zero pressure. The pressure oil in the output chamber 12a flows into the engine 6 via the second passage 12 and the lubrication passage 16 in order to participate in lubrication, and the oil in the engine 6 flows into the oil pan 5 via the third passage 25.

When the displacement regulating system is in a low pressure state, i.e. when the solenoid valve 3 is in the first control position, i.e. shown in fig. 3, the T port is communicated with the a port, and the lubrication passage 16, the sixth passage 26 and the first space 156 are all communicated, if the oil pressure in the lubrication passage 16 is not enough to make the oil in the first space 156 drive the first spool 151, the spool assembly will still be in an initial state, for example, as shown in fig. 1. On the contrary, if the oil pressure is sufficient to drive the first spool 151, the first spool 151 will be driven to move rightward by the pressure oil in the first space 156, that is, the moving posture of the spool assembly is the first posture at this time, and the returning member 155 is further compressed, which corresponds to the first spool gradually occupying the second space in the process, the oil in the occupied space of the second space flows into the oil pan 5 via the third hole 15d, the oil between the outer side wall of the second spool 152 and the inner side wall of the second end of the housing portion flows into the oil pan 5 via the fourth hole 15a and the electromagnetic valve 3, and when the spool assembly moves rightward from the position at the above-mentioned initial state (i.e., initial position) to a predetermined position, the above-mentioned first space 156, third space 153 and second hole 15b are brought into communication, whereby the pressure in the lubrication passage 16 will be sequentially brought via the sixth passage 26, The first hole 15c, the first space 156, the third space 153, the second hole 15b, and the fourth passage 13 flow into the regulation chamber 13a, thereby forcing the regulation ring to change the eccentricity amount of the regulation ring against the elastic force of the regulation ring spring, thereby reducing the displacement and pressure of the output chamber 12a and the regulation chamber 13 a.

When the displacement regulating system is in a high pressure state, i.e. when the control valve is in the second control position, i.e. as shown in fig. 2, the port P is in communication with the port a, at which time the lubrication passage 16, the sixth passage 26 and the first space 156 are in communication, the seventh passage 27, the eighth passage 28 and the fourth hole 15a are in communication, and if the oil pressure in the lubrication passage 16 is insufficient to cause the oil in the first space 156 and the third space 153 to drive the first spool 151, and the oil pressure in the seventh passage 27 is insufficient to drive the second spool 152 through the fourth hole 15a, the spool assembly will be in an initial state. On the contrary, if the oil pressure in the first space 156 is sufficient to drive the first spool 151 and the oil pressure in the seventh passage 27 is sufficient to drive the second spool 152 through the fourth orifice 15a, the first spool 151 will be driven to move to the right, the second spool 152 will be driven to move to the left (at this time, the moving posture of the spool assembly is the second posture), this process corresponds to the first spool 151 and the second spool 152 gradually occupying the second space at the same time, in the above movement manner of the first and second valve spools 151 and 152, when the spool assembly is moved from the position at the initial state (i.e., the initial position) to a predetermined position, the first space 156 and the third space 153 are communicated with the second hole 15b, thereby eventually forcing the adjustment ring against the spring force of the adjustment ring spring to vary the eccentricity of the adjustment ring and thereby reduce the displacement and pressure of the output chamber 12a and the adjustment chamber 13 a.

In addition, the filter 2 may be disposed in the second passage 12 for filtering before the engine oil enters the engine 6, the displacement adjustment system further includes a tenth passage 30, the tenth passage 30 may communicate the second passage 12 with the oil pan 5, and a relief valve 14, such as a relief valve, may be disposed on the tenth passage 30, and when the pressure of the engine oil in the second passage 12 does not reach the relief pressure of the relief valve, the tenth passage 30 is closed by the relief valve, otherwise, the tenth passage 30 is opened by the relief valve, thereby protecting the displacement adjustment system.

The dual control of the electromagnetic valve and the combination valve is adopted, the two-stage variable displacement of the variable pump is realized, the response speed is higher than that of the traditional double-regulation-cavity variable pump, the variable control is stable, the pressure curve output by the variable pump is more suitable for the requirement of an engine, and the structure of the first valve core and the second valve core is adopted, so that the output curve of the high-pressure control variable pump is more stable. Here, the first spool may be a low pressure spool, and the second spool may be a high pressure spool. In addition, the displacement adjusting system has the advantages of small quantity of parts, compact structure, light weight, small pressure pulsation and low noise, and can provide certain pressure and flow of lubricating oil according to the requirements of various working conditions of the engine, reduce the power consumption of the oil pump, save the fuel of the engine and realize energy conservation and emission reduction.

The combination valve comprises an accommodating part and a valve core assembly, wherein the accommodating part is provided with a cavity for accommodating the valve core assembly, the accommodating part has an extending direction, the accommodating part comprises a first end and a second end in the extending direction, the valve core assembly comprises a first valve core and a second valve core, a first space is formed between the first valve core and the first end, a second space is formed between the first valve core and the second valve core, a third space is formed inside the first valve core, the first space is communicated with the third space, a second hole for communicating the second space with the outside and a first hole for communicating the first space with the outside are formed outside the accommodating part, the first valve core is located at an initial position when in the initial state, the first valve core can move to a preset position from the initial position when in the first state, and when the first valve core moves to the preset position, the first hole communicates with the second hole via the first space and the third space. The application provides a combination valve is applied to displacement governing system and passes through the cooperation control of control valve and combination valve, has realized adjusting the second grade of the discharge capacity of variable pump, and is fast than traditional two regulation chamber variable pump response speed, and variable control is steady. In addition, the pressure curve output by the displacement adjusting system is more suitable for the requirement of an engine, and the output curve of the variable pump under high-pressure control is ensured to be stable, so that the technical problems that the pressure curve output by the variable oil pump is difficult to ensure to adapt to the requirement of the engine and the output pressure is easy to change suddenly only through the variable oil pump and the response speed is relatively slow when the output pressure is adjusted by only relying on the variable oil pump for feeding back the oil pressure are solved to a certain extent.

Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present application, and are used for illustrating the technical solutions of the present application, but not limiting the same, and the scope of the present application is not limited thereto, and although the present application is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: those skilled in the art can still make modifications or changes to the embodiments described in the foregoing embodiments, or make equivalent substitutions for some features, within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the exemplary embodiments of the present application, and are intended to be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (10)

1. A combination valve, characterized in that, the combination valve comprises a containing part and a valve core component, the containing part is formed with a cavity for containing the valve core component, the containing part has an extending direction, the containing part comprises a first end and a second end in the extending direction, the valve core component comprises a first valve core and a second valve core,

a first space is formed between the first valve core and the first end, a second space is formed between the first valve core and the second valve core, a third space is formed inside the first valve core, the first space is communicated with the third space, the accommodating part is provided with a second hole for communicating the second space with the outside of the accommodating part and a first hole for communicating the first space with the outside of the accommodating part,

the first valve core is located at an initial position in an initial state, the first hole is disconnected from the second hole in the initial state, the first valve core can move from the initial position to a preset position in the first state of the valve core assembly, and the first hole is communicated with the second hole through the first space and the third space when the first valve core moves to the preset position.

2. The combination valve of claim 1, wherein media can enter the first space and the third space in sequence via the first bore such that the spool assembly switches from the initial state to the first state.

3. The combination valve according to claim 1, wherein the housing portion is formed with a third hole that communicates the second space with an outside of the housing portion,

when the valve core assembly is in the initial state, the second valve core is arranged at the second end, the second end is provided with a fourth hole, when the valve core assembly is in the second state, a medium can enter the first space and the third space through the first hole in sequence, so that the first valve core moves towards the second end, the medium can enter the cavity from the fourth hole, so that the second valve core moves towards the first end, and when the first valve core moves to a preset position, the first hole is communicated with the second hole through the first space and the third space.

4. The combination valve of claim 3, wherein the spool assembly moves in a first position in the first state and in a second position in the second state, wherein only the first spool moves when the spool assembly moves in the first position and both the first and second spools move when the spool assembly moves in the second position.

5. The combination valve of claim 3, wherein the inner side portion of the housing portion is formed with a stopper portion for restricting further movement of the first valve spool toward the first end, the inner side portion of the stopper portion, and the first valve spool defining the first space therebetween in the initial state.

6. The combination valve according to claim 4, wherein the second spool is formed as a cylinder, an outer side portion of the second spool abuts an inner side portion of the housing portion, a side of the second spool facing the first end is open,

the first valve core comprises a first convex part, a concave part and a second convex part which are connected with each other, the outer side parts of the first convex part and the second convex part are attached to the inner side part of the accommodating part, the outer side part of the concave part, the inner side part of the accommodating part and two side parts of the first convex part and the second convex part which face each other jointly define an annular space, the third space comprises a long hole arranged in the first valve core, and the long hole is communicated with the annular space.

7. The combination valve of claim 6, wherein the first spool further comprises a first step portion and a second step portion, the second protrusion, the first step portion, and the second step portion being sequentially connected and sequentially spaced apart from the first end,

the second space is defined by a side of the first boss facing the second end, a side of the first step facing the second end, a side of the second step facing the second end, the one side of the second spool, and an inner side of the receiving portion,

a reset component is arranged between the second step part and the inner side part of the second valve core and is used for enabling the first valve core and the second valve core to generate a movement trend of moving away from each other, so that the valve core assembly can be reset to the initial state from the first state and the second state.

8. A displacement regulating system, comprising a combination valve as claimed in any one of claims 3 to 7.

9. A displacement adjustment system according to claim 8, for adjusting the displacement of medium output to a device to be fed, the displacement adjustment system further comprising:

a control valve;

a variable displacement pump formed with a regulation chamber, an input chamber, and an output chamber, the pressure of a medium output from the output chamber decreasing when the pressure of the medium of the regulation chamber increases;

a media source for providing and receiving the media;

the medium flows from the medium source into the input chamber via a first channel and flows from the output chamber into the device to be supplied via a second channel at a higher pressure, the medium in the device to be supplied flowing into the medium source via a third channel;

the conditioning chamber is in communication with the second space via a fourth channel and the second orifice in sequence;

the second space is in communication with the media source via the third aperture and a fifth channel in sequence;

the second passage communicates with the first bore via a sixth passage;

the fourth orifice is in communication with the control valve through a seventh passage such that the seventh passage is in communication with the second passage via a ninth passage when the control valve is in the first control position and such that the seventh passage is in communication with the media source via an eighth passage when the control valve is in the second control position.

10. A displacement volume adjusting system according to claim 9, characterized in that the second channel is further in communication with the medium source via a tenth channel, that the tenth channel is provided with a relief valve, that the relief valve conducts the tenth channel when the medium in the second channel exceeds a relief pressure, that the second channel is further provided with a filter member,

the control valve is formed as a solenoid valve, the medium is formed as oil, the medium source is formed as an oil pan, the device to be supplied is formed as an engine, and the variable pump is formed as a vane oil pump.

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