Gas purging switch valve, double tank oil supply system and automobile

Abstract

The application belongs to the technical field of automobiles and discloses a degassing switching valve, a double-oil-tank oil supply system and an automobile. The degassing switching valve is used for degassing of the double-oil-tank oil supply system, comprises a valve body and a valve core, the valve body comprises an inner cylinder and an outer cylinder arranged inside and outside, a valve cavity is formed in the inner cylinder, a degassing pump for removing gas in the valve cavity is arranged on the valve body and communicates with the valve cavity, first and second through holes are formed in the side wall of the valve body, the valve core is sealingly inserted between the inner cylinder and the outer cylinder, first and second middle holes are formed in the side wall of the valve core and can communicate with the first and second through holes respectively, a filter hole communicating with the valve cavity is formed in the end of the valve core away from the degassing pump, and the valve core can rotate about its own axis relative to the valve body so that the degassing switching valve has at least three states. The degassing switching valve has a simple and compact structure, occupies a small space and can realize degassing of the double-oil-tank oil supply system at low cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobiles, in particular to a degassing switching valve, a double-oil-tank oil supply system and an automobile. BACKGROUND

[0002] Due to long mileage and high timeliness of diesel commercial vehicles, the volume of the oil tank is generally large. Due to the arrangement of the whole vehicle, the volume of the oil tank cannot be increased indefinitely, so a double-oil-tank oil supply vehicle is developed.

[0003] In the existing oil supply system, when the fuel from the normal-pressure oil tank enters the negative-pressure oil supply system, the solubility of the gas in the fuel decreases due to the sudden decrease in pressure, and a large amount of gas is precipitated from the fuel. Moreover, due to the low-pressure state, the gas density is lower, and the precipitated gas occupies more space, thereby exacerbating the influence of gas precipitation on the system. Therefore, a degassing electric pump needs to be arranged between the oil return pipeline and the precipitated gas to transport the precipitated gas back to the oil tank. The fuel in the fuel filter and the engine oil pump pipeline will no longer have unsolved bubbles, and the fuel entering the high-pressure oil rail is more pure and has a lower gas solubility. However, the existing degassing structure is for single-oil-tank oil supply, and there is no degassing structure for double-oil-tank oil supply. One solution is to directly use the degassing structure of the single-oil-tank, but this will complicate the pipeline connection and occupy a large space. Another solution is to use a degassing electric pump combined with a switching valve structure, as described in patent CN115257363A, which uses a degassing electric pump combined with a solenoid valve to achieve the degassing function, but still occupies a large space and increases the cost. At the same time, since the auxiliary oil tank generally does not have a heating device, the pipeline for supplying oil from the auxiliary oil tank to the main oil tank will be blocked, causing the oil circuit of the double-oil-tank oil supply system to be not smooth, thereby reducing the reliability.

[0004] Therefore, it is urgent to improve the prior art and provide a degassing switching valve to solve the above-mentioned technical problems in the prior art. SUMMARY

[0005] The present application aims to provide a degassing switching valve with high integration, simple and compact structure, small space occupation, and low-cost implementation of degassing for a double-oil-tank oil supply system and prevention of oil circuit blockage.

[0006] To achieve this purpose, the present application adopts the following technical solutions:

[0007] The gas removal switching valve for gas removal of a double-oil-tank oil supply system comprises a valve body and a valve core. The valve body comprises an inner cylinder and an outer cylinder arranged inside and outside, respectively. A valve cavity is formed inside the inner cylinder. A gas removal pump is arranged on the valve body and communicates with the valve cavity, and is used to remove gas in the valve cavity. First and second through holes are sequentially formed in the circumferential side wall of the valve body and penetrate the inner cylinder and the outer cylinder. The first and second through holes are arranged in a staggered manner. One of the first and second through holes is used to communicate with a first oil tank, and the other is used to communicate with a second oil tank. The valve core is sealingly inserted between the inner cylinder and the outer cylinder. A first middle hole selectively communicating with the first through hole and a second middle hole selectively communicating with the second through hole are formed in the side wall of the valve core. A gas filtering hole communicating with the valve cavity is formed in the end of the valve core away from the gas removal pump, and is used to communicate with a diesel filter.

[0008] The valve core can rotate about its own axis relative to the valve body to make the gas removal switching valve have at least three states:

[0009] In the first state, the valve cavity only communicates with the first through hole.

[0010] In the second state, the valve cavity only communicates with the second through hole.

[0011] In the third state, the valve cavity communicates with the first through hole.

[0012] Optionally, a third through hole selectively communicating with the valve cavity is further formed in the circumferential side wall of the valve body. A flow collecting part is arranged on the outer wall of the outer cylinder. The flow collecting part is provided with a flow collecting through hole communicating with the second oil tank. The second and third through holes are located in the inner cavity of the flow collecting part and are axially spaced apart. The circumferential side wall of the valve core is further provided with a third middle hole selectively communicating with the third through hole. In the second state,

[0013] In the second state, among the second and third through holes, the second middle hole only communicates with the second through hole.

[0014] In the third state, among the second and third through holes, the third middle hole only communicates with the third through hole.

[0015] Optionally,

[0016] In the second state, the second middle hole communicates with the second through hole.

[0017] In the third state, the third middle hole communicates with the third through hole.

[0018] Optionally, the first through hole comprises first and second main through holes which are circumferentially spaced apart.

[0019] In the first state, the first middle hole and the first main hole are communicated;

[0020] In the second state, the second middle hole and the second main hole are communicated;

[0021] In the third state, the first middle hole and the second main hole are communicated, and the third middle hole and the third main hole are communicated.

[0022] Optionally, the inner cylinder further comprises a bottom plate at the end away from the degassing pump, and a bottom hole is formed in the bottom plate, which is selectively communicated with the filter hole.

[0023] Optionally, the filter hole comprises a first hole, a second hole and a third hole which are distributed along the circumference, and the bottom hole can be selectively communicated with the first hole, the second hole and the third hole in turn when the valve core is rotated, the first hole is communicated with the bottom hole in the first state, the second hole is communicated with the bottom hole in the second state, and the third hole is communicated with the bottom hole in the third state.

[0024] Optionally, the diameters of the first hole and the second hole are both larger than the diameter of the third hole.

[0025] Optionally, the bottom plate is attached to the inner bottom wall of the valve core.

[0026] The second object of the present application is to provide a dual-oil-tank oil supply system which can realize degassing of the dual-oil-tank oil supply system at low cost.

[0027] To achieve the above object, the present application adopts the following technical scheme:

[0028] The dual-oil-tank oil supply system comprises a first oil tank, a second oil tank and the degassing switching valve according to any one of the above-mentioned schemes, one of the first hole and the second hole is used to communicate with the first oil tank, and the other is used to communicate with the second oil tank.

[0029] The third object of the present application is to provide an automobile which can realize degassing of the dual-oil-tank oil supply system of the automobile at low cost.

[0030] To achieve the above object, the present application adopts the following technical scheme:

[0031] The automobile comprises the dual-oil-tank oil supply system according to the above-mentioned scheme.

[0032] Advantages:

[0033] The degassing switching valve in the application can be used for degassing and switching of a double-oil tank system, and the degassing switching valve realizes the connection and isolation of two oil tanks of the double-oil tank system and the valve cavity by directly rotating the valve core inserted between the inner cylinder and the outer cylinder, so as to realize the degassing and fuel flow switching of the fuel in the two oil tanks. The degassing switching valve not only greatly reduces the space occupied by the degassing structure, but also reduces the production cost without complex pipeline setting. In addition, the operation of the rotating valve core is simple and fast, the degassing switching valve state can be quickly switched, and the response time is short. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 is the axonometric view of the degassing switching valve provided by the embodiment of the application;

[0035] Figure 2 is the exploded view of the degassing switching valve provided by the embodiment of the application;

[0036] Figure 3 is the half-sectional view of the degassing switching valve in the first state provided by the embodiment of the application;

[0037] Figure 4 is the half-sectional view of the degassing switching valve in the second state provided by the embodiment of the application;

[0038] Figure 5 is the half-sectional view of the degassing switching valve in the third state provided by the embodiment of the application.

[0039] In the drawings:

[0040] 100, valve body; 101, first through hole; 1011, first main through hole; 1012, second main through hole; 102, second through hole; 103, third through hole; 110, outer cylinder; 120, inner cylinder; 121, bottom plate; 1211, bottom through hole; 130, flow collecting part; 131, flow collecting through hole;

[0041] 200, valve core; 201, first middle hole; 202, second middle hole; 203, third middle hole; 204, degassing hole; 2041, first hole; 2042, second hole; 2043, third hole;

[0042] 300, degassing pump. DETAILED DESCRIPTION

[0043] The application will be further described in detail below in combination with the drawings and examples. It can be understood that the specific examples described herein are only used to explain the application, but not to limit the application. In addition, it should be noted that, for the convenience of description, only the parts related to the application are shown in the drawings, but not all the structures.

[0044] In the description of the present application, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0045] In the present application, unless otherwise explicitly specified and limited, "on" or "under" of the first feature to the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, "on", "above" and "above" of the first feature to the second feature include that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. "Below", "below" and "below" of the first feature to the second feature include that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0046] In the description of the present embodiment, the terms "up", "down", "right", and other orientation or position relationships are based on the orientation or position relationship shown in the drawings, and are only for the convenience of description and simplification of operation, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" are only used to distinguish in the description, and have no special meaning.

[0047] Please refer to Figures 1 to 5In the embodiment, the degassing switch valve is used for degassing of a double-tank fuel supply system, which comprises a valve body 100 and a valve core 200. The valve body 100 comprises an inner cylinder 120 and an outer cylinder 110 arranged inside and outside, respectively. A valve cavity is formed in the inner cylinder 120. A degassing pump 300 is arranged on the valve body 100 and communicates with the valve cavity, and is used for removing gas in the valve cavity. A first through hole 101 and a second through hole 102 are formed through the circumferential sidewall of the valve body 100. The first through hole 101 and the second through hole 102 are arranged in a staggered manner. One of the first through hole 101 and the second through hole 102 can communicate with a first tank, and the other can communicate with a second tank (neither the first tank nor the second tank is shown here. The double-tank system in the embodiment comprises a main tank and a sub-tank. The following embodiments are described and illustrated with the first tank as the main tank and the second tank as the sub-tank). The valve core 200 is sealingly inserted between the inner cylinder 120 and the outer cylinder 110. A first middle hole 201 and a second middle hole 202 are formed in the sidewall of the valve core 200, and the first middle hole 201 can communicate with the first through hole 101 and the second middle hole 202 can communicate with the second through hole 102. A gas filtering hole 204 is formed in the end of the valve core 200 away from the degassing pump 300 and communicates with the valve cavity. Specifically, the valve core 200 can rotate about its own axis relative to the valve body 100, so that the degassing switch valve has at least three states, which are described in detail as follows.

[0048] As shown in Figure 3 , in the first state, the valve cavity only communicates with the first through hole 101. In this state, the first tank (i.e. the main tank) communicates with the valve cavity of the degassing switch valve, and the degassing pump 300 in the valve cavity is only used for degassing of the fuel in the filter that enters the valve cavity through the gas filtering hole 204.

[0049] As shown in Figure 4 , the valve core 200 of the degassing switch valve is rotated, so that the degassing switch valve enters the second state from the first state. In the second state, the valve cavity only communicates with the second through hole 102. At this time, the main tank injects fuel into the second tank (i.e. the sub-tank) through the valve cavity, thereby opening the connecting pipe between the main tank and the sub-tank, preventing the fuel in the sub-tank from freezing and blocking the connecting pipe, and preparing for the sub-tank to introduce fuel into the main tank. Meanwhile, the degassing pump 300 in the valve cavity is used for degassing of the fuel in the main tank and the filter that enters the valve cavity.

[0050] As shown in Figure 5 , the valve core 200 of the degassing switch valve is rotated again, so that the degassing switch valve enters the third state from the second state. In the third state, the valve cavity communicates with the first through hole 101. At this time, the sub-tank and the main tank both communicate with the valve cavity, so that the sub-tank can inject fuel into the main tank. Meanwhile, the degassing pump 300 in the valve cavity is used for degassing of the fuel in the sub-tank and the filter that enters the valve cavity.

[0051] The degassing switch valve in the embodiment can be used for degassing and switching of the dual-tank system. Compared with the combined mode of using the degassing pump 300 and the switch valve, the degassing switch valve realizes the connection and isolation of the two tanks of the dual-tank system and the valve cavity by directly rotating the valve core 200 inserted between the inner cylinder 120 and the outer cylinder 110, thereby realizing the degassing and flow switching of the fuel in the two tanks. The degassing switch valve not only greatly reduces the space occupied by the degassing structure, but also reduces the production cost without complex pipeline arrangement. In addition, the operation of rotating the valve core 200 is simple and fast, the degassing switch valve state can be quickly switched, and the response time is short.

[0052] Please refer to Figure 3 Further, the valve body 100 is provided with a third through hole 103, the outer cylinder 110 is provided with a flow collecting part 130, the flow collecting part 130 is provided with a flow collecting through hole 131 communicating with the second tank, and the second through hole 102 and the third through hole 103 are located in the inner cavity of the flow collecting part 130. The second through hole 102 and the third through hole 103 are axially spaced apart, and the valve core 200 is provided with a third through hole 203 communicating with the third through hole 103. Figure 4 In the second state, the second through hole 202 only communicates with the second through hole 102, and at this time, the fuel in the filter flows into the inner cavity of the flow collecting part 130 through the valve cavity, the second through hole 202 and the second through hole 102, and then flows to the auxiliary tank through the flow collecting through hole 131 of the flow collecting part 130. Figure 5 In the third state, the third through hole 203 only communicates with the third through hole 103, and at this time, the fuel in the auxiliary tank flows into the inner cavity of the flow collecting part 130 through the flow collecting through hole 131, and then flows into the valve cavity through the third through hole 103 and the second through hole 202, and then flows into the main tank through the first through hole 101 and the first through hole 201. Through the arrangement of the flow collecting part 130, the second through hole 102 and the third through hole 103, the main tank can supply fuel to the auxiliary tank and the auxiliary tank can supply fuel to the main tank using the second through hole 102 and the third through hole 103 respectively, which prevents blockage when only one second through hole 102 is used to communicate the valve cavity and the auxiliary tank, and improves the use reliability of the degassing switch valve.

[0053] As shown in Figure 4 , in the second state, the second through hole 202 communicates with the second through hole 102; as shown in Figure 5 , in the third state, the third through hole 203 communicates with the third through hole 103. Through the above structure, the degassing switch valve simplifies the structure of the valve core 200 and the valve body 100, and further reduces the space occupied by the flow collecting part 130 by axially spacing the second through hole 102 and the third through hole 103.

[0054] As shown in the drawings, Figures 3 to 5 In the present embodiment, the first through hole 101 includes first main through holes 1011 and second main through holes 1012 distributed along the circumference; in the first state, only the first intermediate hole 201 and the first main through hole 1011 are connected; in the second state, only the second intermediate hole 202 and the second through hole 102 are connected; in the third state, the first intermediate hole 201 and the second main through hole 1012 are connected, and the third intermediate hole 203 and the third through hole 103 are connected. By arranging the first intermediate hole 201, the second intermediate hole 202, and the third intermediate hole 203 on the valve body 100, and arranging the first main through hole 1011, the second main through hole 1012, the second through hole 102, and the third through hole 103 on the valve body 100, the switching of the three states of the gas removal switching valve can be realized in sequence by reasonably arranging the positions and relative positions of the holes when the valve core 200 is rotated, and the structure is simple, reducing the processing difficulty and processing cost.

[0055] Please continue to refer to Figure 2 The end of the inner cylinder 120 away from the gas removal pump 300 further includes a bottom plate 121, and a bottom through hole 1211 is formed in the bottom plate 121, which can be connected with the filter hole 204. Specifically, the filter hole 204 includes first holes 2041, second holes 2042, and third holes 2043 distributed along the circumference, and the bottom through hole 1211 can be selectively connected with the first holes 2041, the second holes 2042, and the third holes 2043 in sequence when the valve core 200 is rotated. In the first state, the first holes 2041 are connected with the bottom through hole 1211, in the second state, the second holes 2042 are connected with the bottom through hole 1211, and in the third state, the third holes 2043 are connected with the bottom through hole 1211. The first holes 2041, the second holes 2042, and the third holes 2043 can be connected with the bottom through hole 1211 in sequence when the valve core 200 is rotated, thereby being connected with the valve cavity of the valve body 100, so that the fuel in the filter and the gas in the fuel enter the valve cavity and are degassed by the gas removal pump 300 in the valve cavity.

[0056] As a preferred embodiment, the diameter of the third hole 2043 is smaller than the diameter of the bottom through hole 1211. The third hole 2043 is a small hole compared to the first hole 2041 and the second hole 2042. In the third state, i.e., when the third hole 2043 is connected with the valve cavity, the fuel in the main oil tank is difficult to enter the valve cavity through the third hole 2043 with a smaller diameter after passing through the filter, and only the gas in the fuel can pass through the gas removal pump 300 in the valve cavity for degassing, and the gas removal pump 300 only degasses the fuel from the auxiliary oil tank flowing into the main oil tank.

[0057] Further, the bottom plate 121 is attached to the inner bottom wall surface of the valve core 200. By attaching the bottom plate 121 to the inner bottom wall surface of the valve core 200, the valve core 200 can be sealed to the floor, preventing fuel from entering the gap between the valve core 200 and the bottom plate 121, and ensuring that the valve core 200 can rotate with low resistance.

[0058] The embodiment also provides a dual-tank fuel supply system including the degassing switch valve according to any of the above embodiments, which can realize degassing of the dual-tank fuel supply system at low cost. Specifically, the dual-tank fuel supply system includes a main tank, a sub-tank, a fuel filter, and the degassing switch valve. The main tank is provided with a fuel supply port and a fuel return port. The fuel supply port is provided with a first fuel supply pipe, and the fuel return port is communicated with the engine through a fuel return pipe. The sub-tank is provided with a fuel outlet, and the fuel outlet is provided with a fuel outlet pipe. The fuel filter includes a filter element, and the top of the filter element is a gas collection cavity. The inlet of the fuel filter is communicated with the fuel supply port through the first fuel supply pipe, and the outlet of the fuel filter is communicated with the engine through a second fuel supply pipe. The gas collection cavity is provided with a degassing pipe, and the degassing pipe is communicated with the fuel return pipe. The degassing switch valve is arranged on the degassing pipe, and the fuel outlet pipe of the sub-tank is communicated with the second through hole 102 of the degassing switch valve. Furthermore, the gas collection cavity above the fuel filter is communicated with the filter hole of the degassing switch valve, the first main through hole 1011 and the second main through hole 1012 of the degassing switch valve are both communicated with the first tank (i.e., the main tank), the gas collection through hole of the degassing switch valve is communicated with the second tank (i.e., the sub-tank), and the degassing switch valve has three degassing and switching states, which can realize degassing of the main tank, connection of the main tank to the sub-tank fuel supply pipeline, and supply of fuel from the sub-tank to the main tank at low cost, thereby simplifying the pipeline structure of the dual-tank fuel supply system and reducing production costs.

[0059] The embodiment also provides an automobile including the dual-tank fuel supply system according to the above embodiments, which can realize degassing of the dual-tank fuel supply system of the automobile at low cost. By using the degassing switch valve in the dual-tank fuel supply system used by the automobile, not only can degassing of the main tank be realized, but also one-way communication between the sub-tank and the main tank can be realized, and the pipeline is simple, occupies less space, reduces the amount of fuel bubbles in the pipeline, reduces engine pressure fluctuations, and thus reduces vehicle fuel consumption.

[0060] Obviously, the above embodiments of the present application are only examples for clarity, and are not intended to limit the embodiments of the present application. Those skilled in the art can make various obvious changes, readjustments and substitutions without departing from the scope of the present application. It is unnecessary and impossible to exhaust all embodiments. Any modification, equivalent substitution and improvement made within the spirit and principles of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. A degassing selector valve for degassing of a dual tank fuel supply system, characterized in that The valve body (100) comprises an inner cylinder (120) and an outer cylinder (110) arranged inside and outside, the inner cylinder (120) is internally formed with a valve cavity, the valve body (100) is provided with a degassing pump (300) communicated with the valve cavity, the degassing pump (300) is used for removing gas in the valve cavity; the circumferential side wall of the valve body (100) is sequentially provided with a first through hole (101), a second through hole (102) and a third through hole (103) penetrating through the inner cylinder (120) and the outer cylinder (110), the first through hole (101) and the second through hole (102) are arranged in a staggered manner, one of the first through hole (101) and the second through hole (102) is used for communicating with a first oil tank, and the other is used for communicating with a second oil tank; the outer wall of the outer cylinder (110) is provided with a flow collecting part (130), the flow collecting part (130) is provided with a flow collecting through hole (131) communicated with the second oil tank, and the second through hole (102) and the third through hole (103) are located in the inner cavity of the flow collecting part (130); the first through hole (101) comprises first and second main through holes (1011) and (1012) which are spaced apart along the circumference; The first through hole (101) comprises first and second main through holes (1011) and (1012) which are spaced apart along the circumference; The valve core (200) is sealingly inserted between the inner cylinder (120) and the outer cylinder (110), the side wall of the valve core (200) is provided with a first middle hole (201) selectively communicated with the first through hole (101) and a second middle hole (202) selectively communicated with the second through hole (102); the circumferential side wall of the valve core (200) is also provided with a third middle hole (203) selectively communicated with the third through hole (103); the valve core (200) is provided with a filter gas hole (204) communicated with the valve cavity at an end away from the degassing pump (300), and the filter gas hole (204) is used for communicating with a filter; Wherein, the valve core (200) can rotate around its own axis relative to the valve body (100), so that the degassing switching valve has at least three states: In the first state, the valve cavity is only communicated with the first through hole (101); the first middle hole (201) and the first main through hole (1011) are communicated; In the second state, the valve cavity is only communicated with the second through hole (102), and the second middle hole (202) and the second through hole (102) are communicated; In the third state, the valve cavity is communicated with the first through hole (101) and the third through hole (103); the first middle hole (201) and the second main through hole (1012) are communicated, and the third middle hole (203) and the third through hole (103) are communicated. The end of the inner cylinder (120) away from the degassing pump (300) further comprises a bottom plate (121), the bottom plate (121) is provided with a bottom through hole (1211), and the bottom through hole (1211) is selectively communicated with the filter gas hole (204).

2. The gas purge selector valve of claim 1, wherein ​ 3. The gas purge selector valve of claim 2, wherein, The air filter hole (204) comprises a first hole (2041), a second hole (2042) and a third hole (2043) which are spaced along the circumference, the bottom through hole (1211) can selectively communicate with the first hole (2041), the second hole (2042) and the third hole (2043) in turn when the valve core (200) rotates, the first hole (2041) communicates with the bottom through hole (1211) in the first state, the second hole (2042) communicates with the bottom through hole (1211) in the second state, and the third hole (2043) communicates with the bottom through hole (1211) in the third state.

4. The gas purge selector valve of claim 3, wherein The aperture of the first hole (2041) and the aperture of the second hole (2042) are both larger than the aperture of the third hole (2043).

5. The gas purge selector valve of claim 2, wherein The bottom plate (121) is attached to the inner bottom wall surface of the valve core (200).

6. A dual tank fuel supply system characterised in that, The dual-oil tank oil supply system comprises a first oil tank, a second oil tank and the degassing switching valve according to any one of claims 1-5.

7. An automobile characterized by The dual-oil tank oil supply system according to claim 6.

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