Fuel supply tank, fuel supply system and method of use thereof

Abstract

The application provides a fuel supply tank, a fuel supply system and a use method thereof. The fuel supply tank comprises a tank body and a sliding piece. The sliding piece is slidingly arranged in a cavity of the tank body and divides the cavity into a first containing cavity and a second containing cavity. The tank body has opposite first and second ends. The first containing cavity is close to the first end of the tank body, and the second containing cavity is close to the second end of the tank body. The volumes of the first and second containing cavities change during the sliding of the sliding piece. The first containing cavity is connected to hydrogen, and the second containing cavity is connected to dimethyl ether. The hydrogen is configured to have a pressure greater than or equal to that of the dimethyl ether and drive the sliding piece to extrude the dimethyl ether, so that the dimethyl ether remains in a liquid state after being pressurized. By arranging the tank body and the sliding piece, the hydrogen and the dimethyl ether can be accommodated and isolated. The cost is saved, the pressurizing device required for the dimethyl ether to remain in a liquid state is reduced, the space available for compression ignition engines is increased, and the use of the compression ignition engine is facilitated.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fuel supply, in particular to a fuel supply tank, a fuel supply system and a use method thereof. BACKGROUND

[0002] The compression ignition engine has a high compression ratio, a high thermal efficiency, but requires a large space.

[0003] The compression ignition engine in the related art uses hydrogen as a combustion agent and dimethyl ether as an ignition agent, and pressurizes hydrogen and dimethyl ether through two pressurizing devices respectively.

[0004] However, the compression ignition engine has a complex structure and a large volume, which is not conducive to the use of the compression ignition engine. SUMMARY

[0005] In order to solve at least one problem mentioned in the background, the present application provides a fuel supply tank, a fuel supply system and a use method thereof, which aims to solve the technical problem that the compression ignition engine in the related art has a complex structure and a large volume, which is not conducive to the use of the compression ignition engine.

[0006] In order to achieve the above-mentioned purpose, the present application provides a fuel supply tank, comprising a tank body and a sliding piece, the sliding piece is slidingly arranged in the cavity of the tank body, and the cavity of the tank body is divided into a first containing cavity and a second containing cavity, the tank body has opposite first and second ends, the first containing cavity is close to the first end of the tank body, and the second containing cavity is close to the second end of the tank body, the volume of the first containing cavity and the second containing cavity changes during the sliding of the sliding piece.

[0007] The first containing cavity is connected to hydrogen, and the second containing cavity is connected to dimethyl ether, the hydrogen is configured to have a pressure greater than or equal to the pressure of the dimethyl ether, and the hydrogen drives the sliding piece to extrude the dimethyl ether, so that the dimethyl ether remains in a liquid state after being pressurized.

[0008] In the above-mentioned fuel supply tank, optionally, the pressure of the dimethyl ether in the second containing cavity is greater than or equal to 6 bar;

[0009] And / or, the pressure of the hydrogen in the first containing cavity is greater than or equal to 8 bar.

[0010] In the above-mentioned fuel supply tank, optionally, further comprising a guide piece, the guide piece is fixed in the tank body and extends in the direction from the first end to the second end;

[0011] The sliding piece is slidingly connected with the guide piece, and the sliding piece slides along the extension direction of the guide piece.

[0012] In the fuel supply tank, optionally, the tank body is provided with a hydrogen inlet and a hydrogen outlet which are in communication with the first accommodating cavity.

[0013] The tank body is also provided with a dimethyl ether inlet and a dimethyl ether outlet which are in communication with the second accommodating cavity.

[0014] In the fuel supply tank, optionally, the direction from the first end to the second end is a first direction, and the hydrogen inlet and the hydrogen outlet are both parallel to the first direction.

[0015] The dimethyl ether inlet and the dimethyl ether outlet are both in a second direction which is perpendicular to the first direction.

[0016] In the fuel supply tank, optionally, the hydrogen inlet and the hydrogen outlet are both located at the first end of the tank body.

[0017] The dimethyl ether inlet and the dimethyl ether outlet are both located at the second end of the tank body.

[0018] In a second aspect, the application further provides a fuel supply system, comprising a hydrogen supply device, a hydrogen ejection valve, a dimethyl ether supply device, a dimethyl ether ejection valve, and the fuel supply tank, the hydrogen supply device and the hydrogen ejection valve being in communication with the first accommodating cavity of the tank body of the fuel supply tank, and the dimethyl ether supply device and the dimethyl ether ejection valve being in communication with the second accommodating cavity of the tank body of the fuel supply tank.

[0019] In the fuel supply system, optionally, the hydrogen supply device comprises a pressure hydrogen tank, a pressure reducing valve, and a hydrogen control valve, the pressure hydrogen tank being in communication with the first accommodating cavity through a pipeline, the pressure reducing valve and the hydrogen control valve being arranged on the pipeline, and the hydrogen control valve being located on the side of the pressure reducing valve close to the first accommodating cavity.

[0020] In a third aspect, the application further provides a method for using a fuel supply system, comprising:

[0021] controlling the dimethyl ether supply device to introduce dimethyl ether into the second accommodating cavity of the tank body of the fuel supply tank;

[0022] controlling the hydrogen supply device to release hydrogen, so that the hydrogen enters the first accommodating cavity of the tank body of the fuel supply tank, and the hydrogen is configured to have a pressure greater than or equal to that of the dimethyl ether and drive the sliding member to press the dimethyl ether, so that the dimethyl ether remains in a liquid state after being pressurized;

[0023] controlling the dimethyl ether ejection valve to release the dimethyl ether in a liquid state;

[0024] controlling the hydrogen ejection valve to release the hydrogen.

[0025] In the method of using the fuel supply system, after controlling the hydrogen ejection valve to release the hydrogen, the method further comprises:

[0026] controlling the dimethyl ether supply device to continue to release dimethyl ether, so that the dimethyl ether enters the second containing cavity of the tank body.

[0027] The fuel supply tank, the fuel supply system and the method of using the fuel supply system provided by the present application, the fuel supply tank comprises a tank body and a sliding piece, the sliding piece is slidingly arranged in a cavity of the tank body and divides the cavity of the tank body into a first containing cavity and a second containing cavity, the tank body has opposite first and second ends, the first containing cavity is close to the first end of the tank body, and the second containing cavity is close to the second end of the tank body, the volumes of the first containing cavity and the second containing cavity change during the sliding of the sliding piece; the first containing cavity is connected to hydrogen, and the second containing cavity is connected to dimethyl ether, the hydrogen is configured to have a pressure greater than or equal to that of the dimethyl ether and drive the sliding piece to press the dimethyl ether, so that the dimethyl ether remains in a liquid state after being pressurized. By arranging the sliding piece, on the one hand, the cavity of the tank body can be divided into the first containing cavity and the second containing cavity to accommodate the hydrogen and the dimethyl ether and isolate the hydrogen and the dimethyl ether, so that the hydrogen and the dimethyl ether can be located in the tank body at the same time without contacting each other; on the other hand, the sliding piece can slide in the tank body, the pressure required for the dimethyl ether to remain in a liquid state is provided by the hydrogen, and when the volume of the dimethyl ether changes, the hydrogen can push the sliding piece to maintain the pressure of the dimethyl ether, that is, one fuel supply tank is used to accommodate the hydrogen and the dimethyl ether, which saves costs, reduces the booster device required for the dimethyl ether to remain in a liquid state, increases the space available for the compression ignition engine, and facilitates the use of the compression ignition engine.

[0028] The configuration of the present application and other application purposes and beneficial effects thereof will be more obvious and understandable through the description of the preferred embodiments in conjunction with the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings required for use in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0030] Figure 1 The structural schematic diagram of the fuel supply tank provided by the embodiments of the present application;

[0031] Figure 2 The structural schematic diagram of the fuel supply system provided by the embodiments of the present application;

[0032] Figure 3 Structure diagram of a hydrogen supply device of a fuel supply system provided by an embodiment of the present application;

[0033] Figure 4 Flow diagram of a method for using a fuel supply system provided by an embodiment of the present application.

[0034] Legend of reference signs:

[0035] 100 - fuel supply tank;

[0036] 110 - tank body;

[0037] 1101 - first end;

[0038] 1102 - second end;

[0039] 120 - sliding member;

[0040] 111 - first accommodating cavity;

[0041] 112 - second accommodating cavity;

[0042] 130 - guide member;

[0043] 113 - hydrogen inlet;

[0044] 114 - hydrogen outlet;

[0045] 115 - dimethyl ether inlet;

[0046] 116 - dimethyl ether outlet;

[0047] a - first direction;

[0048] b - second direction;

[0049] 200 - fuel supply system;

[0050] 210 - hydrogen supply device;

[0051] 220 - hydrogen ejection valve;

[0052] 230 - dimethyl ether supply device;

[0053] 240 - dimethyl ether ejection valve;

[0054] 211 - pressurized hydrogen tank;

[0055] 212 - pressure reducing valve;

[0056] 213 - hydrogen control valve.

[0057] The specific embodiments of the present application have been shown by the above drawings, and will be described in more detail hereinafter. These drawings and the written description are not intended to restrict the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0058] In the related art, a compression ignition engine uses inert gas to pressurize dimethyl ether, so that the pressure of the dimethyl ether is always higher than the saturated vapor pressure of the dimethyl ether, that is, the dimethyl ether remains in a liquid state; the dimethyl ether has a high cetane number and is easy to be compression ignited, and hydrogen can be used as a combustion agent and dimethyl ether can be used as an ignition agent. However, the compression ignition engine described above pressurizes hydrogen and dimethyl ether by two pressurizing devices respectively to obtain hydrogen that can be injected and dimethyl ether in a liquid state, and has a complex structure and a large volume, which is not conducive to the use of the compression ignition engine.

[0059] Based on the above technical problems, the embodiments of the present application provide a fuel supply tank, a fuel supply system and a use method thereof. The fuel supply tank comprises a tank body and a sliding member, the sliding member is slidingly arranged in a cavity of the tank body and divides the cavity of the tank body into a first containing cavity and a second containing cavity, the tank body has opposite first and second ends, the first containing cavity is close to the first end of the tank body, and the second containing cavity is close to the second end of the tank body, the volumes of the first containing cavity and the second containing cavity change during the sliding of the sliding member; the first containing cavity is connected to hydrogen, and the second containing cavity is connected to dimethyl ether, the hydrogen is configured to have a pressure greater than or equal to that of the dimethyl ether and drive the sliding member to press the dimethyl ether, so that the dimethyl ether remains in a liquid state after being pressurized. By arranging the sliding member, on the one hand, the cavity of the tank body can be divided into the first containing cavity and the second containing cavity to contain hydrogen and dimethyl ether and isolate the hydrogen and the dimethyl ether, so that the hydrogen and the dimethyl ether can be located in the tank body at the same time and will not contact each other; on the other hand, the sliding member can slide in the tank body, the pressure required for the dimethyl ether to remain in a liquid state is provided by the hydrogen, and when the volume of the dimethyl ether changes, the hydrogen can push the sliding member to maintain the pressure of the dimethyl ether, that is, one fuel supply tank is used to contain hydrogen and dimethyl ether respectively, the cost is saved, the pressurizing device required for the dimethyl ether to remain in a liquid state is reduced, the space available for the compression ignition engine is increased, and the use of the compression ignition engine is facilitated.

[0060] For the purposes of the present application, the technical solutions and advantages, the preferred embodiments of the present application will be described in more detail below with reference to the drawings. In the drawings, the same or similar reference numbers represent the same or similar components or components with the same or similar functions throughout. The described embodiments are part of the embodiments of the present application, not all of the embodiments. The embodiments described below by reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as limiting the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor are within the scope of protection of the present application. The embodiments of the present application will be described in detail below with reference to the drawings.

[0061] In the description of the embodiments of the present application, it should be understood that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood in a broad sense, for example, it can be a fixed connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0062] Figure 1 The structure schematic diagram of the fuel supply tank provided by the embodiments of the present application is shown.

[0063] In the first aspect, with reference to the drawings Figure 1 The embodiments of the present application provide a fuel supply tank 100, which comprises a tank body 110 and a sliding piece 120, the tank body 110 has opposite first end 1101 and second end 1102, the sliding piece 120 is slidingly arranged in the cavity of the tank body 110, that is, the sliding piece 120 can slide between the first end 1101 and the second end 1102 of the tank body 110.

[0064] It should be noted that the shape of the fuel supply tank 100 can be any, for example, the shape of the fuel supply tank 100 can be a rectangular parallelepiped, a cylinder, a triangular prism, etc. The specific shape of the fuel supply tank 100 is not limited by the embodiments of the present application, nor is it limited to the above examples.

[0065] Specifically, the sliding piece 120 divides the cavity of the tank body 110 into a first containing cavity 111 and a second containing cavity 112, the first containing cavity 111 is close to the first end 1101 of the tank body 110, and the second containing cavity 112 is close to the second end 1102 of the tank body 110. During the sliding process of the sliding piece 120, the volume of the first containing cavity 111 and the second containing cavity 112 changes, that is, the first end 1101 and the second end 1102 are two circular end faces of the fuel supply tank 100 in the shape of a cylinder.

[0066] Exemplarily, when the sliding member 120 moves in the direction from the first end 1101 to the second end 1102, the volume of the first accommodating cavity 111 decreases, and the volume of the second accommodating cavity 112 increases; when the sliding member 120 moves in the direction from the second end 1102 to the first end 1101, the volume of the first accommodating cavity 111 increases, and the volume of the second accommodating cavity 112 decreases.

[0067] Further, the first accommodating cavity 111 is connected to hydrogen, and the second accommodating cavity 112 is connected to dimethyl ether, the hydrogen is configured to have a pressure greater than or equal to the pressure of the dimethyl ether, and the hydrogen drives the sliding member 120 to press the dimethyl ether, so that the dimethyl ether remains in a liquid state after being pressurized.

[0068] That is, the hydrogen pressure in the first accommodating cavity 111 is greater than the dimethyl ether pressure in the second accommodating cavity 112, and the hydrogen will generate a thrust force on the sliding member 120, and when the sliding member 120 can move, it will push the sliding member 120 to slide in the direction close to the second end 1102.

[0069] The specific process is as follows: when the dimethyl ether in the second accommodating cavity 112 does not fill the second accommodating cavity 112, there is space in the second accommodating cavity 112, at this time, the hydrogen pressure is greater than the dimethyl ether pressure, that is, the pressure in the first accommodating cavity 111 is greater than the pressure in the second accommodating cavity 112, and the sliding member 120 is pushed to move towards the second end 1102, at this time, the space of the first accommodating cavity 111 increases, the first accommodating cavity 111 can continue to be connected to hydrogen, and the first accommodating cavity 111 with increased space can be immediately filled with hydrogen; the space of the second accommodating cavity 112 decreases, and the second accommodating cavity 112 is not continuously connected to dimethyl ether, the space of the sliding member 120 pressing the dimethyl ether can maintain the pressure of the dimethyl ether, so that the dimethyl ether remains in a liquid state.

[0070] It should be noted that dimethyl ether is normally in a gaseous state, and under a pressure greater than or equal to 6 bar, it is in a liquid state. If the above fuel supply tank 100 is not adopted, when the dimethyl ether enters the compression ignition engine, the pressure changes rapidly, and the dimethyl ether will rapidly switch between the liquid state and the gaseous state, that is, the dimethyl ether will switch between the gaseous state and the condensed state, and the volume will alternately expand, resulting in sharp oscillation and collision, which will cause the compression ignition engine to be subjected to strong impact and cannot be continuously operated for a long time.

[0071] By setting the sliding member 120, on the one hand, the cavity of the tank body 110 can be divided into the first containing cavity 111 and the second containing cavity 112 to accommodate hydrogen and dimethyl ether and isolate the hydrogen and dimethyl ether to ensure that the hydrogen and dimethyl ether can be located in the tank body 110 at the same time and will not contact; on the other hand, the sliding member 120 can slide in the tank body 110, and the pressure required by the dimethyl ether in a liquid state is provided by the hydrogen, and when the capacity of the dimethyl ether changes, the hydrogen can push the sliding member 120 to maintain the pressure of the dimethyl ether, that is, one fuel supply tank 100 is used to accommodate the hydrogen and dimethyl ether, which saves the cost, reduces the booster device required by the dimethyl ether in a liquid state, increases the space available for the compression ignition engine, and is beneficial to the use of the compression ignition engine.

[0072] As an optional embodiment, the pressure of the dimethyl ether in the second containing cavity 112 is greater than or equal to 6 bar.

[0073] It can be understood that the pressure required by the dimethyl ether to change from a gaseous state to a liquid state is at least 6 bar, and thus when the pressure of the dimethyl ether in the second containing cavity 112 is greater than or equal to 6 bar, the dimethyl ether can be in a liquid state and can be stably used as an ignition agent.

[0074] As an optional embodiment, the pressure of the hydrogen in the first containing cavity 111 is greater than or equal to 8 bar.

[0075] It can be understood that the pressure required by the dimethyl ether to change from a gaseous state to a liquid state is at least 6 bar, and the pressure of the hydrogen can be selected to be greater than the pressure value of the dimethyl ether, for example, 8 bar, 9 bar, 10 bar, etc., which can have a lower pressure control cost while ensuring the pressure requirement of the dimethyl ether. The specific pressure of the hydrogen in the first containing cavity 111 is not limited in the embodiment of the application, and is not limited to the above examples.

[0076] The embodiment of the application is only described by taking the pressure of the hydrogen in the first containing cavity as 8 bar as an example.

[0077] As an optional embodiment, the fuel supply tank 100 further includes a guide member 130, the guide member 130 is fixed in the tank body 110 and extends in a direction from the first end 1101 to the second end 1102, the sliding member 120 is in sliding connection with the guide member 130, and the sliding member 120 slides in the extension direction of the guide member 130. By setting the guide member 130, the sliding of the sliding member 120 can be guided, so that the sliding member 120 can move in the direction from the first end 1101 to the second end 1102.

[0078] It can be understood that the specific forms of the guide member 130 and the sliding member 120 correspond to each other. For example, the guide member 130 can be a sliding rail, and the sliding member 120 can be a sliding block in sliding connection with the sliding rail; or the guide member 130 can be a guide column, and the sliding member 120 can be a sliding block penetrating the guide column. The specific forms of the guide member 130 and the sliding member 120 are not limited in the embodiments of the present application.

[0079] Further, the position of the guide member 130 in the fuel supply tank 100 can also be arbitrary. For example, the guide member 130 can be located at the center of the fuel supply tank 100 and connected with the first end 1101 and the second end 1102 of the fuel supply tank 100; or the guide member 130 can be located at the tank wall of the fuel supply tank 100. The specific position of the guide member 130 is not limited in the embodiments of the present application.

[0080] Hereinafter, the guide member 130 is taken as an example of being located at the center of the fuel supply tank 100.

[0081] As an optional embodiment, the tank body 110 is provided with a hydrogen inlet 113 and a hydrogen outlet 114 in communication with the first accommodating cavity 111; and the tank body 110 is also provided with a dimethyl ether inlet 115 and a dimethyl ether outlet 116 in communication with the second accommodating cavity 112. Hydrogen is introduced into the first accommodating cavity 111 through the hydrogen inlet 113, and the hydrogen is discharged to the outside through the hydrogen outlet 114, so that the first accommodating cavity 111 can maintain a certain pressure; dimethyl ether is introduced into the second accommodating cavity 112 through the dimethyl ether inlet 115, and the dimethyl ether is discharged to the outside through the dimethyl ether outlet 116, so that the dimethyl ether can be replenished in time when it is consumed.

[0082] It should be noted that the hydrogen inlet 113 is connected with a hydrogen pressure increasing device to limit the hydrogen pressure in the first accommodating cavity 111.

[0083] As an optional embodiment, the direction from the first end 1101 to the second end 1102 is the first direction a, and the opening directions of the hydrogen inlet 113 and the hydrogen outlet 114 are parallel to the first direction a; the opening directions of the dimethyl ether inlet 115 and the dimethyl ether outlet 116 are the second direction b, and the second direction b is perpendicular to the first direction a. By setting the hydrogen inlet and outlet in the first direction a, the hydrogen can help the sliding member 120 to slide; by setting the dimethyl ether inlet and outlet in the second direction b, i.e., the dimethyl ether inlet 115 and the dimethyl ether outlet 116 are arranged on the side of the tank body 110, the dimethyl ether can be introduced and discharged.

[0084] As an optional implementation, the hydrogen inlet 113 and the hydrogen outlet 114 are both located at the first end 1101 of the tank body 110; the dimethyl ether inlet 115 and the dimethyl ether outlet 116 are both located at the second end 1102 of the tank body 110, which is close to the ground. By arranging the hydrogen inlet and outlet at the first end 1101 and the dimethyl ether inlet and outlet at the second end 1102, the hydrogen can be located away from the ground on the side of the dimethyl ether, and then the sliding member 120 can change the volume of the first containing cavity 111 and the second containing cavity 112 by its own gravity when there is space in the second containing cavity 112, so as to achieve the purpose of auxiliary sliding, accelerate the sliding of the sliding member 120, and shorten the time required for pressure balance in the fuel supply tank 100.

[0085] Figure 2 A structural schematic diagram of a fuel supply system 200 provided by an embodiment of the present application is shown in the figure. Figure 3 A structural schematic diagram of a hydrogen supply device 210 of the fuel supply system 200 provided by an embodiment of the present application is shown in the figure.

[0086] In a second aspect, referring to the figures Figure 2 The embodiment of the present application further provides a fuel supply system 200, which comprises a hydrogen supply device 210, a hydrogen ejection valve 220, a dimethyl ether supply device 230, a dimethyl ether ejection valve 240, and a fuel supply tank 100.

[0087] Specifically, the hydrogen supply device 210 and the hydrogen ejection valve 220 are both in communication with the first containing cavity 111 of the tank body 110 of the fuel supply tank 100, and the dimethyl ether supply device 230 and the dimethyl ether ejection valve 240 are both in communication with the second containing cavity 112 of the tank body 110 of the fuel supply tank 100.

[0088] It can be understood that the hydrogen supply device 210, the hydrogen ejection valve 220, the dimethyl ether supply device 230, and the dimethyl ether ejection valve 240 can all be in communication with the fuel supply tank 100 through pipelines, and the length of the pipelines can be adjusted according to actual conditions.

[0089] By arranging the hydrogen supply device 210 and the hydrogen ejection valve 220 to be spaced from each other, the influence on the fuel supply tank 100 can be avoided; by arranging the dimethyl ether supply device 230 and the dimethyl ether ejection valve 240 to be spaced from each other, the influence on the fuel supply tank 100 can be avoided.

[0090] As an optional implementation, referring to the figures Figure 3As shown, the hydrogen supply device 210 includes a pressure hydrogen tank 211, a pressure reducing valve 212 and a hydrogen control valve 213, the pressure hydrogen tank 211 is communicated with the first accommodating cavity 111 through a pipeline, the pressure reducing valve 212 and the hydrogen control valve 213 are both arranged on the pipeline, and the hydrogen control valve 213 is located on the side of the pressure reducing valve 212 close to the first accommodating cavity 111.

[0091] It should be noted that the hydrogen pressure released by the hydrogen supply device 210 can be greater than the hydrogen pressure released by the hydrogen control valve 213, for example, the hydrogen pressure released by the hydrogen supply device 210 can be 35 MPa, the pressure reducing valve 212 can reduce the hydrogen pressure released by the hydrogen supply device 210, such as reducing to 8 bar, and the hydrogen control valve 213 is configured to pass the hydrogen into the first accommodating cavity 111, and the speed of passing the hydrogen can be controlled.

[0092] Figure 4 A flowchart of a method for using the fuel supply system 200 provided by the embodiments of the present application is provided.

[0093] In a third aspect, referring to Figure 4 , and in combination with Figures 1-3 , the embodiments of the present application also provide a method for using the fuel supply system 200, for the fuel supply system 200, comprising:

[0094] S100, controlling the dimethyl ether supply device to pass dimethyl ether into the second accommodating cavity of the tank body of the fuel supply tank;

[0095] S200, controlling the hydrogen supply device to release hydrogen, so that the hydrogen enters the first accommodating cavity of the tank body of the fuel supply tank, the hydrogen is configured to have a pressure greater than or equal to the pressure of the dimethyl ether, and drives the sliding member to press the dimethyl ether, so that the dimethyl ether remains in a liquid state after being pressurized;

[0096] It should be noted that the order of S100 and S200 is not fixed, for example, the dimethyl ether can be passed in first, and then the hydrogen is passed in; another example, the hydrogen can be passed in first, and then the dimethyl ether is passed in. The embodiments of the present application do not limit the order of S100 and S200, and are not limited to the above examples.

[0097] The embodiments of the present application are described by taking the example of realizing S100 first and then realizing S200.

[0098] S300, controlling the dimethyl ether ejection valve to release dimethyl ether in a liquid state;

[0099] It can be understood that the released dimethyl ether in a liquid state can enter the intake pipeline of the compression ignition engine as a pilot of the compression ignition engine.

[0100] S400, controlling the hydrogen ejection valve to release hydrogen.

[0101] It can be understood that the released dimethyl ether can enter the cylinder of the compression ignition engine as a combustion agent of the compression ignition engine.

[0102] It should be noted that the order of S300 and S400 is not fixed, for example, the liquid state dimethyl ether can be released first, and then the hydrogen is released; another example is that the hydrogen is released first, and then the liquid state dimethyl ether is released. The order of S300 and S400 is not limited by the embodiments of the present application.

[0103] The embodiments of the present application take S300 and S400 as examples for description.

[0104] As an optional implementation, after controlling the hydrogen gas ejection valve 220 to release the hydrogen gas, it further includes:

[0105] S500, control the dimethyl ether supply device to continue to release dimethyl ether, so that the dimethyl ether enters the second containing cavity of the tank body.

[0106] It can be understood that when the capacity of the dimethyl ether is less than the preset value, the dimethyl ether supply device can continue to release the dimethyl ether, and the continuously released dimethyl ether is transformed into a liquid state under the action of hydrogen and maintained.

[0107] The fuel supply tank 100, the fuel supply system 200 and the use method thereof provided by the embodiment of the present application, the fuel supply tank 100 comprises a tank body 110 and a sliding piece 120, the sliding piece 120 is slidingly arranged in the cavity of the tank body 110, and the cavity of the tank body 110 is divided into a first containing cavity 111 and a second containing cavity 112, the tank body 110 has opposite first and second ends 1101 and 1102, the first containing cavity 111 is close to the first end 1101 of the tank body 110, and the second containing cavity 112 is close to the second end 1102 of the tank body 110, the volume of the first containing cavity 111 and the second containing cavity 112 changes in the sliding process of the sliding piece 120; the first containing cavity 111 is connected to hydrogen, and the second containing cavity 112 is connected to dimethyl ether, the hydrogen is configured to have a pressure greater than or equal to the pressure of the dimethyl ether, and drives the sliding piece 120 to extrude the dimethyl ether, so that the dimethyl ether remains in a liquid state after being pressed. By arranging the sliding piece 120, on the one hand, the cavity of the tank body 110 can be divided into the first containing cavity 111 and the second containing cavity 112 to accommodate hydrogen and dimethyl ether, and the hydrogen and the dimethyl ether are isolated to ensure that the hydrogen and the dimethyl ether can be located in the tank body 110 at the same time and cannot contact each other; on the other hand, the sliding piece 120 can slide in the tank body 110, the pressure required for the dimethyl ether to remain in a liquid state is provided by the hydrogen, and when the volume of the dimethyl ether changes, the hydrogen can push the sliding piece 120 to maintain the pressure of the dimethyl ether, that is, one fuel supply tank 100 is used to accommodate hydrogen and dimethyl ether respectively, which saves the cost, reduces the booster device required for the dimethyl ether to remain in a liquid state, increases the space available for the compression ignition engine, and facilitates the use of the compression ignition engine.

[0108] The terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, 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 the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specified.

[0109] The terms "first", "second", "third", "fourth", and the like in the description and in the claims of the present application and in the above diagram merely denote like objects, and do not necessarily denote objects in a given sequential or chronological order. It is to be understood that such terms can be interchanged, where appropriate, to refer to a similar object in a different embodiment. Furthermore, the terms "comprise", "comprising", "include", "including", and "has", "having" and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, product, or apparatus that comprises a list of steps or units are not necessarily limited to those steps or units which are expressly listed, but can include other not expressly listed steps or units.

[0110] It should be noted finally that the above embodiments are only used to illustrate the technical solutions of the present application, rather than limit the same; even though the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements for some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A fuel supply tank characterized by comprising: The tank body and the sliding member are provided in the cavity of the tank body and divide the cavity into a first accommodating cavity and a second accommodating cavity, the tank body has opposite first and second ends, the first accommodating cavity is close to the first end of the tank body, and the second accommodating cavity is close to the second end of the tank body, the volume of the first and second accommodating cavities changes during sliding of the sliding member; The first accommodating cavity is connected to hydrogen gas as a combustion agent, and the second accommodating cavity is connected to dimethyl ether as an ignition agent, the hydrogen gas is configured to have a pressure greater than that of the dimethyl ether during fuel supply to an engine and to drive the sliding member to press the dimethyl ether so that the dimethyl ether remains in a liquid state after being pressurized; The hydrogen gas is configured to be discharged from the first accommodating cavity and supplied to the engine as a combustion agent after driving the sliding member; The pressure of the dimethyl ether in the second accommodating cavity is greater than or equal to 6 bar; And / or, the pressure of the hydrogen gas in the first accommodating cavity is greater than or equal to 8 bar.

2. The fuel supply tank according to claim 1, characterized by A guide member is further provided, which is fixed in the tank body and extends in the direction from the first end to the second end; The sliding member is in sliding connection with the guide member and slides along the extension direction of the guide member.

3. The fuel supply tank according to any one of claims 1-2, characterized in that, The tank body is provided with a hydrogen gas inlet and a hydrogen gas outlet connected to the first accommodating cavity; The tank body is further provided with a dimethyl ether inlet and a dimethyl ether outlet connected to the second accommodating cavity.

4. The fuel supply tank according to claim 3, characterized by The direction from the first end to the second end is a first direction, and the opening directions of the hydrogen gas inlet and the hydrogen gas outlet are parallel to the first direction; The opening directions of the dimethyl ether inlet and the dimethyl ether outlet are a second direction, and the second direction is perpendicular to the first direction.

5. The fuel supply tank according to claim 3, characterized by The hydrogen gas inlet and the hydrogen gas outlet are located at the first end of the tank body; The dimethyl ether inlet and the dimethyl ether outlet are located at the second end of the tank body.

6. A fuel supply system characterized by comprising: The hydrogen gas supply device and the hydrogen gas injection valve are both connected to the first accommodating cavity of the tank body of the fuel supply tank, and the dimethyl ether supply device and the dimethyl ether injection valve are both connected to the second accommodating cavity of the tank body of the fuel supply tank.

7. The fuel supply system according to claim 6, characterized by The hydrogen gas supply device comprises a pressure hydrogen tank, a pressure reducing valve and a hydrogen control valve, the pressure hydrogen tank is connected to the first accommodating cavity through a pipeline, the pressure reducing valve and the hydrogen control valve are both arranged on the pipeline, and the hydrogen control valve is located on the side of the pressure reducing valve close to the first accommodating cavity.

8. A method of using a fuel supply system, characterized by, The fuel supply system of claim 6 or 7 comprises: controlling the dimethyl ether supply device to supply dimethyl ether to the second accommodating cavity of the tank body of the fuel supply tank; controlling the hydrogen gas supply device to release hydrogen gas into the first accommodating cavity of the tank body of the fuel supply tank, the hydrogen gas being configured to have a pressure greater than that of the dimethyl ether and to drive the sliding member to press the dimethyl ether so that the dimethyl ether remains in a liquid state after being pressurized; controlling the dimethyl ether ejection valve to release the dimethyl ether in a liquid state; controlling the hydrogen ejection valve to release the hydrogen gas.

9. The method of using a fuel supply system of claim 8, wherein, after controlling the hydrogen ejection valve to release the hydrogen gas, further comprising: controlling the dimethyl ether supply device to continue releasing the dimethyl ether so that the dimethyl ether enters the second containing cavity of the tank body. controlling the dimethyl ether ejection valve to release the dimethyl ether in a liquid state; controlling the hydrogen ejection valve to release the hydrogen gas. after controlling the hydrogen ejection valve to release the hydrogen gas, further comprising: controlling the dimethyl ether supply device to continue releasing the dimethyl ether so that the dimethyl ether enters the second containing cavity of the tank body.

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