Fuel injection device, control method, apparatus and readable storage medium thereof

Abstract

The application discloses a fuel injection device and a control method, equipment and readable storage medium thereof, and relates to the technical field of vehicles. The fuel injection device is applied to a multi-fuel vehicle, and comprises a communication valve and a nozzle structure. The communication valve comprises a valve sleeve and a valve core which moves in a radial direction in the valve sleeve. A fuel outlet end and at least two fuel inlet ends which are spaced apart by a preset distance are arranged on the valve sleeve, and the fuel outlet end is in communication with the nozzle structure. The valve core is provided with a middle pipeline, and a pipeline opening of the middle pipeline is provided with a one-way valve which is opened in the direction of the fuel outlet end. The application solves the technical problem that the cost is excessively high because different fuel injection assemblies need to be configured for different fuels on the existing multi-fuel vehicle.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and in particular to a fuel injection device and its control method, apparatus and readable storage medium. Background Technology

[0002] With the development of vehicle energy technology, vehicle energy is moving towards a diversified new energy supply structure.

[0003] Currently, many vehicle models offer multiple fuel options. The current approach typically involves using one injection system for each fuel type. For example, a methanol / gasoline dual-fuel engine requires one gasoline injector assembly and one methanol injector assembly. Therefore, requiring separate injector assemblies for different fuels in existing multi-fuel vehicles leads to excessively high costs. Summary of the Invention

[0004] The main objective of this application is to provide a fuel injection device and its control method, apparatus and readable storage medium, which aims to solve the technical problem that the need to configure corresponding injector assemblies for different fuels in existing multi-fuel vehicles leads to excessive costs.

[0005] To achieve the above objectives, in a first aspect, this application provides a fuel injection device for use in a multi-fuel vehicle, the fuel injection device comprising a connecting valve and a nozzle structure; the connecting valve comprising a valve sleeve and a valve core that moves axially within the valve sleeve; The valve sleeve is provided with a fuel outlet end and at least two fuel inlet ends spaced at a preset distance, and the fuel outlet end is connected to the nozzle structure; The valve core is provided with a central through pipe, and the pipe opening of the central through pipe is provided with a one-way valve, which opens towards the fuel outlet end.

[0006] According to the first aspect, the top and bottom ends of the valve core are respectively connected to the inner wall of the valve sleeve by return springs, and the inner wall of the valve sleeve is also provided with an electromagnetic unit for controlling the valve core to move axially within the valve sleeve after the electromagnetic unit is energized.

[0007] According to the first aspect, or any implementation of the first aspect above, the connecting valve further includes an upper cavity and a lower cavity. When the one-way valve is opened, the upper cavity, the central pipe, and the lower cavity are connected to the nozzle structure.

[0008] According to the first aspect, or any implementation of the first aspect above, the fuel inlet end includes a first fuel inlet and a second fuel inlet; When the valve core of the connecting valve is in the first initial position, the valve core blocks the first fuel inlet and the second fuel inlet; When the valve core of the connecting valve is in the first target position, the valve core blocks the second fuel inlet, and the first fuel inlet is connected to the nozzle structure in sequence through the upper cavity of the connecting valve, the central pipe, and the lower cavity of the connecting valve; When the valve core of the connecting valve is in the second target position, the valve core blocks the first fuel inlet, and the second fuel inlet is connected to the nozzle structure through the lower cavity of the connecting valve.

[0009] According to the first aspect, or any implementation of the first aspect above, the fuel inlet end includes a third fuel inlet, a fourth fuel inlet, and a fifth fuel inlet; the valve core of the connecting valve includes a first sub-valve core and a second sub-valve core, and a middle cavity is provided between the first sub-valve core and the second sub-valve core; The first sub-valve core is provided with a first sub-central passage pipe, and the pipe opening of the first sub-central passage pipe is provided with a first sub-check valve; The second sub-valve core is provided with a second sub-central passage pipe, and the pipe opening of the second sub-central passage pipe is provided with a second sub-check valve.

[0010] According to the first aspect, or any implementation of the first aspect above, the connecting valve includes a first sub-connecting valve and a second sub-connecting valve, the first sub-connecting valve includes a sixth fuel inlet and a seventh fuel inlet, the second sub-connecting valve includes an eighth fuel inlet and a fuel docking port; the first sub-fuel outlet end of the first sub-connecting valve is connected to the fuel docking port, and the second sub-fuel outlet end of the second sub-connecting valve is connected to the nozzle structure. The first sub-connecting valve includes a third sub-valve core, and the second sub-connecting valve includes a fourth sub-valve core; the third sub-valve core is provided with a third sub-central passage pipe, and the pipe opening of the third sub-central passage pipe is provided with a third sub-check valve; the fourth sub-valve core is provided with a fourth sub-central passage pipe, and the pipe opening of the fourth sub-central passage pipe is provided with a fourth sub-check valve.

[0011] According to the first aspect, or any implementation of the first aspect above, the fuel injection device further includes at least two fuel chambers, each of the fuel chambers being connected to the corresponding fuel inlet end on the valve sleeve of the connecting valve; The fuel input channel of the fuel chamber is connected to the fuel supply device of the multi-fuel vehicle, and the fuel return channel of the fuel chamber is connected to the fuel supply device of the multi-fuel vehicle.

[0012] According to the first aspect, or any implementation of the first aspect above, the nozzle structure is connected to the cylinder block of the engine of the multi-fuel vehicle, or to the intake passage of the engine.

[0013] Secondly, this application provides a control method for a fuel injection device, applied to the fuel injection device as described above, the control method for the fuel injection device comprising: In response to an injection command for the fuel injection device, wherein the injection command includes injection type, injection timing and injection duration; Determine the target movement position of the valve core in the fuel injection device according to the type of injection; The fuel injection device is controlled to inject fuel based on the target location, the injection time, and the injection duration.

[0014] Thirdly, this application provides a control device for a fuel injection device, the control device comprising: a memory and a processor, wherein the memory stores a computer program executable on the processor, the computer program being configured to implement the steps of the control method for the fuel injection device as described above.

[0015] Fourthly, this application provides a computer-readable storage medium storing a computer program that, when executed by a processor, causes the processor to perform a control method for a fuel injection device as described in any one of the first aspects or possible implementations thereof.

[0016] Fifthly, embodiments of this application provide a computer program including instructions for performing a control method for a fuel injection device in the first aspect and any possible implementation thereof.

[0017] This application discloses a fuel injection device for multi-fuel vehicles. The fuel injection device includes a connecting valve and a nozzle structure. The connecting valve includes a valve sleeve and a valve core that moves axially within the valve sleeve. The valve sleeve has a fuel outlet end and at least two fuel inlet ends spaced at a predetermined distance. The fuel outlet end is connected to the nozzle structure. The valve core has a central conduit, and a one-way valve is installed at the inlet of the central conduit. The one-way valve opens towards the fuel outlet end. Thus, by moving the valve core of the connecting valve, this application allows the valve core to block all fuel inlet ends on the valve sleeve, or to leave one fuel inlet end connected to the nozzle structure through the connecting valve, thereby delivering fuel entering from that fuel inlet end to the nozzle structure. Furthermore, the central conduit on the valve core, with the one-way valve opening towards the fuel outlet end, prevents fuel being delivered from the fuel inlet end currently being injected from entering other fuel inlet ends. This application achieves the injection of at least two fuels through the same fuel injection device. Compared with the existing multi-fuel injection assembly scheme, it effectively reduces the production, development and maintenance costs of the fuel injection device, and saves the space required for the layout of the fuel injection device, thus effectively improving the integration level of multi-fuel vehicles. Attached Figure Description

[0018] Figure 1 A schematic diagram of the fuel injection system for a multi-fuel vehicle; Figure 2 This is a schematic diagram of the structure of the first embodiment of the fuel injection device of this application; Figure 3 This is a schematic diagram of the connecting valve involved in the embodiments of this application; Figure 4 This is a schematic diagram of a scenario involving a first initial position in an embodiment of this application; Figure 5 This is a schematic diagram of a scenario involving the first target location in an embodiment of this application; Figure 6 This is a schematic diagram of a scenario involving the second target location in an embodiment of this application; Figure 7 This is a schematic diagram of the structure of the fuel chamber involved in the embodiments of this application; Figure 8 This is a schematic diagram of the structure of the second embodiment of the fuel injection device of this application; Figure 9 This is a schematic diagram of a scenario involving the third target location in an embodiment of this application; Figure 10 This is a schematic diagram of a scenario involving the fourth target location in an embodiment of this application; Figure 11This is a schematic diagram of a scenario involving the fifth target location in an embodiment of this application; Figure 12 This is a schematic diagram of the structure of the third embodiment of the fuel injection device of this application; Figure 13 This is a schematic diagram of a scenario involving the sixth target location in an embodiment of this application; Figure 14 This is a schematic diagram of a scenario involving the seventh target location in an embodiment of this application; Figure 15 This is a schematic diagram of a scenario involving the eighth target location in an embodiment of this application; Figure 16 This is a schematic flowchart of an embodiment of the control method for the fuel injection device of this application; Figure 17 This is a schematic diagram of the device structure of the hardware operating environment involved in the embodiments of this application.

[0019] Explanation of icon numbers:

[0020] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0021] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0022] In this article, the term "and / or" is merely a description of the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone.

[0023] The terms "first" and "second," etc., used in the specification and claims of this application are used to distinguish different objects, not to describe a specific order of objects. For example, "first target object" and "second target object," etc., are used to distinguish different target objects, not to describe a specific order of target objects.

[0024] In the embodiments of this application, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design that is described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design. Specifically, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0025] It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit this application.

[0026] To better describe the technical solution of this application, the fuel injection device of this application is described below in conjunction with some prior art: With the development of vehicle energy technology, vehicle energy is moving towards a diversified new energy supply structure.

[0027] Currently, many vehicle models support multiple fuels, and the current solutions typically use one injection system for each type of fuel. For example, methanol / gasoline dual-fuel engines can be found here. Figure 1 , Figure 1 This is a schematic diagram of the fuel injection system for a multi-fuel vehicle. Figure 1 The methanol / gasoline dual-fuel vehicle shown requires one gasoline injector assembly and one methanol injector assembly. Therefore, existing multi-fuel vehicles require separate injector assemblies for different fuels, which leads to excessive costs. On the other hand, multiple injector assemblies also occupy a lot of space.

[0028] This application achieves the injection of at least two fuels through the same fuel injection device. Compared with the existing multi-fuel injection assembly scheme, it effectively reduces the production, development and maintenance costs of the fuel injection device, and saves the space required for the layout of the fuel injection device, thus effectively improving the integration level of multi-fuel vehicles.

[0029] Please refer to Figure 2 , Figure 2 This is a schematic diagram of the structure of a first embodiment of the fuel injection device of this application. The first embodiment of this application provides a fuel injection device applied to a multi-fuel vehicle. The fuel injection device includes a connecting valve and a nozzle structure 30; the connecting valve includes a valve sleeve 10 and a valve core 20 that moves axially within the valve sleeve 10. The valve sleeve 10 is provided with a fuel outlet end 12 and at least two fuel inlet ends 11 spaced at a preset distance. The fuel outlet end 12 is connected to the nozzle structure 30. The valve core 20 is provided with a central pipe 21, and a one-way valve 22 is provided at the pipe opening of the central pipe 21. The one-way valve 22 opens towards the fuel outlet end 12.

[0030] In this embodiment, it should be noted that the connecting valve includes a valve sleeve 10 and a valve core 20 that moves axially (i.e., along the axis of the valve sleeve 10) within the valve sleeve 10. The cross-sectional shape of the valve sleeve 10 can be circular, rectangular, or other shapes. The outer diameter of the valve core 20 matches the inner diameter of the valve sleeve 10. It is understood that the connecting valve can be a solenoid valve (i.e., the valve core 20 is driven to move axially within the valve sleeve 10 by electromagnetic force) or a mechanical valve (i.e., the valve core 20 is driven to move axially within the valve sleeve 10 by mechanical force).

[0031] In this embodiment, it should also be noted that at least two fuel inlet ends 11 spaced at a predetermined distance are disposed on the valve sleeve 10 and communicate with the interior of the connecting valve. The fuel input at the fuel inlet end can be liquid fuel (such as gasoline, diesel, methanol, etc.), gaseous fuel (such as hydrogen, natural gas, etc.), and reaction activators for assisting combustion (such as nitrate esters, toluene-methylbenzyl nitrate esters, glycerol trinitrate esters, tetraglycerol dinitrate esters, tert-butyl peroxide, di-tert-butyl peroxide alkyl esters, oxalates, carbonates, oleates, furfural, acetone, diethyl ether, ethyl acetate, hydrogen peroxide, ammonium nitrate, ammonium nitrite, etc., or a mixture of several of these). In addition, the material of the fuel injection device needs to be selected according to the fuel characteristics of the multi-fuel vehicle. Taking hydrogen (H2) and methanol (CH3OH) as examples, the material of the fuel injection device in contact with the fuel needs to be resistant to hydrogen and alcohol.

[0032] In this embodiment, it should also be noted that the one-way valve 22 can be installed at one end of the central pipe 21 or at both ends of the central pipe 21. The nozzle structure 30 includes a spray hole for spraying out the fuel delivered by the connecting valve.

[0033] As an example, there are two fuel inlet ends 11. The upper fuel inlet end 11 receives the first fuel, and the lower fuel inlet end 11 receives the second fuel. When the fuel injection device is not in operation, the valve core 20 remains in the initial position (i.e., the position that simultaneously blocks both fuel inlet ends 11), blocking both fuel inlet ends 11. Upon receiving the first injection command (i.e., the control command to inject the first fuel), the control valve core 20 moves down to the first target position (i.e., the position that does not block the upper fuel inlet end 11), opening the upper fuel inlet end 11 and inputting the first fuel into the connecting valve. After the pressure of the first fuel reaches a certain pressure, it pushes the one-way valve 22 to open, so that the first fuel flows through the one-way valve 22 on the valve core 20 through the central pipe 21 and enters the nozzle orifice of the lower nozzle structure 30 from the fuel outlet end 12 and is ejected. Upon receiving the injection stop command, the valve core 20 moves up back to the initial position, blocking the upper fuel inlet end 11. Since the one-way valve 22 can only open to one side, it closes as the pressure drops after the upper fuel inlet 11 is blocked. Upon receiving the second injection command (i.e., the control command to inject the second fuel), the valve core 20 moves upward to the second target position (i.e., the position that does not block the lower fuel inlet 11), opening the lower fuel inlet 11. The second fuel flows through the connecting valve and enters the nozzle orifice of the lower nozzle structure 30 from the fuel outlet 12. Upon receiving the injection stop command, the valve core 20 moves downward back to the initial position, blocking the lower fuel inlet 11. Furthermore, since the one-way valve 22 can only open to one side, the second fuel will not enter the central pipe 21 or the upper fuel inlet 11 during the second fuel injection process, ensuring that no contamination occurs between different fuels.

[0034] Taking two fuel inlet ends 11 as an example, with the upper fuel inlet end 11 supplying hydrogen (H2) and the lower fuel inlet end 11 supplying methanol (CH3OH), when the fuel injection device is not in operation, the valve core 20 remains in the initial position (i.e., simultaneously blocking both fuel inlet ends 11), blocking both fuel inlet ends 11. Upon receiving an injection command, the control valve core 20 moves down to the first target position (i.e., not blocking the upper fuel inlet end 11), opening the upper fuel inlet end 11. After the hydrogen pressure reaches a certain level, it pushes the one-way valve 22 to open, allowing hydrogen to flow through the one-way valve 22 on the valve core 20, through the central pipe 21, and exit from the fuel outlet end 12 into the nozzle orifice of the lower nozzle structure 30. Upon receiving an injection stop command, the valve core 20 moves up back to the initial position, blocking the upper fuel inlet end 11. Since the one-way valve 22 can only open to one side, it closes as the pressure drops after the upper fuel inlet 11 stops injecting fuel. Upon receiving an injection command, the valve core 20 moves upward to the second target position (i.e., the position that does not block the lower fuel inlet 11), opening the lower fuel inlet 11. Methanol flows through the connecting valve and enters the nozzle orifice of the lower nozzle structure 30 from the fuel outlet 12. Upon receiving an injection stop command, the valve core 20 moves downward back to the initial position, blocking the lower fuel inlet 11.

[0035] Among them, the top and bottom ends of the valve core 20 are respectively connected to the inner wall of the valve sleeve 10 by a return spring 23. The inner wall of the valve sleeve 10 is also provided with an electromagnetic unit 13, which is used to control the valve core 20 to move axially within the valve sleeve 10 after the electromagnetic unit 13 is energized.

[0036] In this embodiment, it should be noted that the electromagnetic unit 13 can be an electromagnetic coil, which can be located at the center of the top of the inner wall of the valve sleeve 10 to ensure uniform force on the valve core 20. The valve core 20 can be a magnetic body or contain magnetic materials. By adjusting the direction of the current input to the electromagnetic coil, an attractive or repulsive force is generated on the valve core 20, causing the valve core 20 to move axially within the valve sleeve 10. If the valve core 20 can be an iron body or contain iron materials, then the electromagnetic unit 13 can also be a pair of electromagnetic coils, respectively located at the center of the top and bottom of the inner wall of the valve sleeve 10. When the electromagnetic coil at the center of the top of the inner wall of the valve sleeve 10 is energized, it controls the valve core 20 to move axially towards the top of the inner wall of the valve sleeve 10. When the electromagnetic coil at the center of the bottom of the inner wall of the valve sleeve 10 is energized, it controls the valve core 20 to move axially towards the bottom of the inner wall of the valve sleeve 10.

[0037] See Figure 3 , Figure 3This is a schematic diagram of the connecting valve involved in the embodiment of this application. Return springs 23 are connected between the top and bottom ends of the valve core 20 and the inner wall of the valve sleeve 10, respectively. An electromagnetic unit 13 is also provided on the inner wall of the valve sleeve 10, used to control the axial movement of the valve core 20 within the valve sleeve 10 after the electromagnetic unit 13 is energized. Exemplarily, a return spring 23 is connected between the top end of the valve core 20 and the top of the inner wall of the valve sleeve 10.

[0038] The connecting valve further includes an upper cavity K1 and a lower cavity K2. When the one-way valve 22 is opened, the upper cavity K1, the central pipe 21, and the lower cavity K2 are connected to the nozzle structure 30.

[0039] The fuel inlet end 11 includes a first fuel inlet F1 and a second fuel inlet F2; When the valve core 20 of the connecting valve is in the first initial position, the valve core 20 blocks the first fuel inlet F1 and the second fuel inlet F2; When the valve core 20 of the connecting valve is in the first target position, the valve core 20 blocks the second fuel inlet F2, and the first fuel inlet F1 is connected to the nozzle structure 30 in sequence through the upper cavity K1 of the connecting valve, the middle pipe 21 and the lower cavity K2 of the connecting valve. When the valve core 20 of the connecting valve is in the second target position, the valve core 20 blocks the first fuel inlet F1, and the second fuel inlet F2 is connected to the nozzle structure 30 through the lower cavity K2 of the connecting valve.

[0040] In this embodiment, it should be noted that the upper cavity K1 is the cavity formed between the top end of the valve core 20 and the top of the inner wall of the valve sleeve 10, and the lower cavity K2 is the cavity formed between the bottom end of the valve core 20 and the bottom of the inner wall of the valve sleeve 10.

[0041] See Figure 4 , Figure 5 and Figure 6 , Figure 4 This is a schematic diagram of a scenario involving a first initial position in an embodiment of this application. Figure 5 This is a schematic diagram of a scenario involving the first target location in an embodiment of this application. Figure 6 This is a schematic diagram of a scenario involving the second target location in an embodiment of this application. Figure 4As shown, when the valve core 20 of the connecting valve is in the first initial position (i.e., the valve core 20 blocks the first fuel inlet F1 and the second fuel inlet F2), the valve core 20 blocks the first fuel inlet F1 and the second fuel inlet F2. At this time, the first fuel inlet F1 and the second fuel inlet F2 cannot communicate with the nozzle structure 30, so the fuel input through the first fuel inlet F1 and the second fuel inlet F2 cannot be sprayed out through the nozzle structure 30. Figure 5 As shown, Figure 5 The dashed arrows indicate the flow direction of fuel input from the first fuel inlet F1. When the valve core 20 of the connecting valve is in the first target position (i.e., the valve core 20 blocks the second fuel inlet F2), the valve core 20 blocks the second fuel inlet F2, and the first fuel inlet F1 opens. Under pressure, the one-way valve 22 opens. The first fuel inlet F1 then sequentially connects to the nozzle structure 30 through the upper cavity K1, the middle pipe 21, and the lower cavity K2 of the connecting valve. Thus, the fuel input from the first fuel inlet F1 can sequentially flow through the upper cavity K1, the middle pipe 21, and the lower cavity K2 of the connecting valve, and then enter the nozzle structure 30 and be ejected. Figure 5 As shown, Figure 6 The dashed arrows indicate the flow direction of fuel input from the second fuel inlet F2. When the valve core 20 of the connecting valve is in the second target position (i.e., the position where the valve core 20 blocks the first fuel inlet F1), the valve core 20 blocks the first fuel inlet F1, and the second fuel inlet F2 communicates with the nozzle structure 30 through the lower cavity K2 of the connecting valve. Therefore, the fuel input from the second fuel inlet F2 can flow through the lower cavity K2 of the connecting valve and then enter the nozzle orifice of the nozzle structure 30 for ejection.

[0042] The fuel injection device further includes at least two fuel chambers FR, each fuel chamber FR being connected to the corresponding fuel inlet end 11 on the valve sleeve 10 of the connecting valve; The fuel input channel T1 of the fuel chamber FR is connected to the fuel supply device of the multi-fuel vehicle, and the fuel return channel T2 of the fuel chamber FR is connected to the fuel supply device of the multi-fuel vehicle.

[0043] In this embodiment, it should be noted that the fuel supply device of the multi-fuel vehicle includes at least a fuel storage unit (such as a hydrogen tank, gasoline tank, diesel tank, methanol tank, etc.), and may also include a filtration unit, a pressurization unit, etc. For example, taking hydrogen fuel as an example, the fuel supply device may include a hydrogen tank, a hydrogen filter, and a hydrogen pressure regulator connected in sequence. Taking methanol fuel as an example, the fuel supply device may include a methanol tank, a methanol filter, and a methanol pump connected in sequence.

[0044] Figure 7This is a schematic diagram of the fuel chamber structure involved in the embodiments of this application. Figure 7 As shown, the number of fuel chambers FR is the same as the number of fuel inlet ends 11. Figure 7 Taking a multi-fuel vehicle with two fuel chambers FR as an example, the fuel supply device inputs fuel into the fuel chambers FR through the fuel input channel T1, and then from the fuel chambers FR into the corresponding fuel inlet end 11 on the valve sleeve 10 of the connecting valve. Finally, the fuel is delivered to the nozzle structure 30 through the connecting valve and sprayed out. Unsprayed fuel can then flow back to the multi-fuel vehicle's fuel supply device through the fuel return channel T2 to avoid unnecessary fuel loss.

[0045] The nozzle structure 30 is connected to the cylinder block of the engine of the multi-fuel vehicle or to the intake passage of the engine.

[0046] In this embodiment, the nozzle structure 30 can be connected to the cylinder block of the engine of the multi-fuel vehicle to achieve direct injection of fuel into the engine cylinder. The nozzle structure 30 can also be connected to the engine's intake passage to achieve intake manifold injection of fuel, which can be selected according to actual needs. Furthermore, the fuel chamber FR of the fuel injection device can be equipped with a heating or cooling structure as needed, and a heating structure can also be added to the fuel outlet end of the nozzle structure 30 or the connecting valve as needed. Fuel filters can also be added to the fuel chamber FR, the nozzle structure 30, or the fuel outlet end of the connecting valve to prevent blockage of the passage or the nozzle structure 30.

[0047] The first embodiment of this application proposes a fuel injection device for multi-fuel vehicles. The fuel injection device includes a connecting valve and a nozzle structure. The connecting valve includes a valve sleeve and a valve core that moves axially within the valve sleeve. The valve sleeve has a fuel outlet end and at least two fuel inlet ends spaced at a predetermined distance. The fuel outlet end is connected to the nozzle structure. The valve core has a central conduit, and a one-way valve is installed at the inlet of the central conduit, opening towards the fuel outlet end. Thus, this embodiment allows the valve core to block all fuel inlet ends on the valve sleeve, or to allow one fuel inlet end to connect to the nozzle structure via the connecting valve, thereby delivering fuel entering from that fuel inlet end to the nozzle structure. Furthermore, the central conduit on the valve core, with its one-way valve opening towards the fuel outlet end, prevents fuel being delivered from the fuel inlet end currently being injected from entering other fuel inlet ends. This embodiment achieves the injection of at least two fuels through the same fuel injection device. Compared with the existing multi-fuel injection assembly scheme, it effectively reduces the production, development and maintenance costs of the fuel injection device, and saves the space required for the layout of the fuel injection device, thus effectively improving the integration level of multi-fuel vehicles.

[0048] Please refer to Figure 8 , Figure 8 This is a schematic diagram of the structure of a second embodiment of the fuel injection device of this application. The second embodiment of this application provides a fuel injection device, wherein the fuel inlet end includes a third fuel inlet F3, a fourth fuel inlet F4, and a fifth fuel inlet F5; the valve core 20 of the connecting valve includes a first sub-valve core N1 and a second sub-valve core N2, and a central cavity K3 is provided between the first sub-valve core N1 and the second sub-valve core N2; The first sub-valve core N1 is equipped with a first sub-central passage pipe CT1, and the pipe port of the first sub-central passage pipe CT1 is equipped with a first sub-check valve V1; The second sub-valve core N2 is equipped with a second sub-central passage pipe CT2, and the pipe port of the second sub-central passage pipe CT2 is equipped with a second sub-check valve V2.

[0049] In this embodiment, it should be noted that the distance between the first sub-valve core N1 and the second sub-valve core N2 is a preset fixed distance. The preset fixed distance will not change during the movement of the first sub-valve core N1 and the second sub-valve core N2. The preset fixed distance can be maintained by setting at least one support rod with a preset fixed distance between the first sub-valve core N1 and the second sub-valve core N2.

[0050] For injection requirements necessitating two or more fuels, this can be achieved by adding a valve core and a fuel inlet. For example... Figure 8As shown, when the first sub-valve core N1 and the second sub-valve core N2 are in the second initial position (i.e., the first sub-valve core N1 blocks the third fuel inlet F3 and the fourth fuel inlet F4, and the second sub-valve core N2 blocks the fifth fuel inlet F5), the valve core 20 blocks the third fuel inlet F3, the fourth fuel inlet F4 and the fifth fuel inlet F5. See Figure 9 , Figure 9 This is a schematic diagram of the scenario involving the third target position in the embodiment of this application. When the first sub-valve core N1 and the second sub-valve core N2 are in the third target position (i.e., the position where the first sub-valve core N1 blocks the fourth fuel inlet F4, and the position where the second sub-valve core N2 blocks the fifth fuel inlet F5), the valve core 20 blocks the fourth fuel inlet F4 and the fifth fuel inlet F5. The third fuel inlet F3 is connected to the nozzle structure 30 in sequence through the upper cavity K1 of the connecting valve, the first sub-check valve V1 which opens under pressure, the first sub-central pipe CT1, the central cavity K3, the second sub-check valve V2 which opens under pressure, the second sub-central pipe CT2, and the lower cavity K2 of the connecting valve. Figure 9 The dashed arrow indicates the flow direction of fuel input through the third fuel inlet F3. Thus, the fuel input through the third fuel inlet F3 can flow sequentially through the upper cavity K1 of the connecting valve, the first sub-check valve V1 (opening under pressure), the first sub-central passage CT1, the middle cavity K3, the second sub-check valve V2 (opening under pressure), the second sub-central passage CT2, and the lower cavity K2 of the connecting valve, before being delivered to the nozzle structure 30 for ejection.

[0051] See Figure 10 , Figure 10 This is a schematic diagram of the fourth target position involved in the embodiment of this application. When the first sub-valve core N1 and the second sub-valve core N2 are in the fourth target position (i.e., the position where the first sub-valve core N1 blocks the third fuel inlet F3, and the position where the second sub-valve core N2 blocks the fifth fuel inlet F5), the valve core 20 blocks the third fuel inlet F3 and the fifth fuel inlet F5. The fourth fuel inlet F4 is connected to the nozzle structure 30 in sequence through the middle cavity K3, the second sub-check valve V2 which opens under pressure, the second sub-central passage CT2, and the lower cavity K2 of the connecting valve. Figure 10 The dashed arrow indicates the flow direction of fuel input through the fourth fuel inlet F4. Thus, the fuel input through the fourth fuel inlet F4 can flow sequentially through the central cavity K3, the second sub-check valve V2 which opens under pressure, the second sub-central passage CT2, and the lower cavity K2 of the connecting valve, before being delivered to the nozzle structure 30 for ejection.

[0052] See Figure 11 , Figure 11This is a schematic diagram of the scenario involving the fifth target position in the embodiment of this application. When the first sub-valve core N1 and the second sub-valve core N2 are in the fifth target position (i.e., the position where the first sub-valve core N1 blocks the third fuel inlet F3 and the fourth fuel inlet F4), the valve core 20 blocks the third fuel inlet F3 and the fourth fuel inlet F4, and the fifth fuel inlet F5 is connected to the nozzle structure 30 through the lower cavity K2 of the connecting valve. Figure 11 The dashed arrow indicates the flow direction of fuel input through the fifth fuel inlet F5. Thus, the fuel input through the fifth fuel inlet F5 can be transported through the lower cavity K2 of the connecting valve to the nozzle structure 30 for ejection.

[0053] The second embodiment of this application provides a fuel injection device. The fuel inlet includes a third fuel inlet F3, a fourth fuel inlet F4, and a fifth fuel inlet F5. The valve core 20 of the connecting valve includes a first sub-valve core N1 and a second sub-valve core N2, with a central cavity K3 between the first sub-valve core N1 and the second sub-valve core N2. The first sub-valve core N1 is provided with a first sub-central passage CT1, and a first sub-check valve V1 is provided at the outlet of the first sub-central passage CT1. The second sub-valve core N2 is provided with a second sub-central passage CT2, and a second sub-check valve V2 is provided at the outlet of the second sub-central passage CT2. Thus, by means of a three-way connecting valve, the injection of three different fuels is realized. It can be understood that, based on this, more fuel inlets and valve cores can be added to construct a multi-way connecting valve, realizing the injection of even more fuels.

[0054] Please refer to Figure 12 , Figure 12 This is a schematic diagram of the structure of a third embodiment of the fuel injection device of this application. The third embodiment of this application provides a fuel injection device, wherein the connecting valve includes a first sub-connecting valve LT1 and a second sub-connecting valve LT2. The first sub-connecting valve LT1 includes a sixth fuel inlet F6 and a seventh fuel inlet F7, and the second sub-connecting valve LT2 includes an eighth fuel inlet F8 and a fuel interface F9. The first sub-fuel outlet end of the first sub-connecting valve LT1 is connected to the fuel interface F9, and the second sub-fuel outlet end of the second connecting valve LT2 is connected to the nozzle structure 30. The first sub-connecting valve LT1 includes a third sub-valve core N3, and the second sub-connecting valve LT2 includes a fourth sub-valve core N4; the third sub-valve core N3 is provided with a third sub-central passage pipe CT3, and the pipe port of the third sub-central passage pipe CT3 is provided with a third sub-check valve V3; the fourth sub-valve core N4 is provided with a fourth sub-central passage pipe CT4, and the pipe port of the fourth sub-central passage pipe CT4 is provided with a fourth sub-check valve V4.

[0055] For injection requirements involving two or more fuels, this can be achieved by connecting the connecting valves together. Furthermore, compared to adding a valve core and fuel inlet, this reduces the axial space occupied by the connecting valves.

[0056] like Figure 12 As shown, when the third sub-valve core N3 and the fourth sub-valve core N4 are in the third initial position (i.e., the third sub-valve core N3 blocks the sixth fuel inlet F6 and the seventh fuel inlet F7, and the fourth sub-valve core N4 blocks the eighth fuel inlet F8 and the fuel docking port F9), the valve core 20 blocks the sixth fuel inlet F6, the seventh fuel inlet F7 and the eighth fuel inlet F8.

[0057] See Figure 13 , Figure 13 This is a schematic diagram of the sixth target position involved in the embodiment of this application. When the third sub-valve core N3 and the fourth sub-valve core N4 are in the sixth target position (i.e., the third sub-valve core N3 blocks the seventh fuel inlet F7, and the fourth sub-valve core N4 blocks the eighth fuel inlet F8), the valve core 20 blocks the seventh fuel inlet F7 and the eighth fuel inlet F8. The sixth fuel inlet F6 is connected to the nozzle structure 30 in sequence through the upper cavity of the first sub-connecting valve LT1, the third sub-check valve V3 which is opened under pressure, the third sub-central pipe CT3, the lower cavity of the first sub-connecting valve LT1, the fuel connection port F9, the upper cavity of the second sub-connecting valve LT2, the fourth sub-check valve V4 which is opened under pressure, the fourth sub-central pipe CT4, and the lower cavity of the second sub-connecting valve LT2. Figure 13 The dashed arrow indicates the flow direction of fuel input through the sixth fuel inlet F6. Thus, the fuel input through the sixth fuel inlet F6 flows sequentially through the upper cavity of the first sub-connecting valve LT1, the third sub-check valve V3 (open under pressure), the third sub-central pipe CT3, the lower cavity of the first sub-connecting valve LT1, the fuel connection port F9, the upper cavity of the second sub-connecting valve LT2, the fourth sub-check valve V4 (open under pressure), the fourth sub-central pipe CT4, and the lower cavity of the second sub-connecting valve LT2, before being delivered to the nozzle structure 30 for ejection.

[0058] See Figure 14 , Figure 14This is a schematic diagram of the scenario involving the seventh target position in the embodiments of this application. When the third sub-valve core N3 and the fourth sub-valve core N4 are in the seventh target position (i.e., the position where the third sub-valve core N3 blocks the sixth fuel inlet F6, and the position where the fourth sub-valve core N4 blocks the eighth fuel inlet F8), the valve core 20 blocks the sixth fuel inlet F6 and the eighth fuel inlet F8. The seventh fuel inlet F7 is connected to the nozzle structure 30 in sequence through the lower cavity of the first sub-connecting valve LT1, the fuel interface F9, the upper cavity of the second sub-connecting valve LT2, the fourth sub-check valve V4 which is opened under pressure, the fourth sub-central pipe CT4, and the lower cavity of the second sub-connecting valve LT2. Figure 14 The dashed arrow indicates the flow direction of fuel input through the seventh fuel inlet F7. Thus, the fuel input through the seventh fuel inlet F7 flows sequentially through the lower cavity of the first sub-connecting valve LT1, the fuel interface F9, the upper cavity of the second sub-connecting valve LT2, the fourth sub-check valve V4 which opens under pressure, the fourth sub-central pipe CT4, and the lower cavity of the second sub-connecting valve LT2, before being delivered to the nozzle structure 30 for ejection.

[0059] See Figure 15 , Figure 15 This is a schematic diagram of the eighth target position involved in the embodiment of this application. When the third sub-valve core N3 and the fourth sub-valve core N4 are in the eighth target position (i.e., the third sub-valve core N3 blocks the sixth fuel inlet F6 and the seventh fuel inlet F7, and the fourth sub-valve core N4 blocks the fuel connection port F9), the valve core 20 blocks the sixth fuel inlet F6 and the seventh fuel inlet F7, and the eighth fuel inlet F8 is connected to the nozzle structure 30 through the lower cavity of the second sub-connecting valve LT2. Figure 15 The dashed arrow indicates the flow direction of fuel input through the eighth fuel inlet F8. Thus, the fuel input through the eighth fuel inlet F8 can be transported through the lower cavity of the second sub-connecting valve LT2 to the nozzle structure 30 for ejection.

[0060] The third embodiment of this application provides a fuel injection device, wherein the connecting valve includes a first sub-connecting valve LT1 and a second sub-connecting valve LT2. The first sub-connecting valve LT1 includes a sixth fuel inlet F6 and a seventh fuel inlet F7, and the second sub-connecting valve LT2 includes an eighth fuel inlet F8 and a fuel docking port F9. The first sub-fuel outlet end of the first sub-connecting valve LT1 is connected to the fuel docking port F9, and the second sub-fuel outlet end of the second sub-connecting valve LT2 is connected to the nozzle structure 30. The first sub-connecting valve LT1 includes a third sub-valve core N3, and the second sub-connecting valve LT2 includes a fourth sub-valve core N4. The third sub-valve core N3 is provided with a third sub-central passage CT3, and the pipe opening of the third sub-central passage CT3 is provided with a third sub-check valve V3. The fourth sub-valve core N4 is provided with a fourth sub-central passage CT4, and the pipe opening of the fourth sub-central passage CT4 is provided with a fourth sub-check valve V4. Therefore, this embodiment constructs a multi-port connecting valve by splicing connecting valves, realizing the injection of three different fuels. Compared with the method of constructing a multi-port connecting valve by adding a fuel inlet end and a valve core, it reduces the space occupied in the axial direction of the connecting valve.

[0061] This application also proposes a multi-fuel vehicle, which includes the fuel injection device as described in the above embodiments.

[0062] See Figure 16 , Figure 16 This is a schematic flowchart of an embodiment of the control method for the fuel injection device of this application.

[0063] One embodiment of this application provides a control method for a fuel injection device, applied to the fuel injection device described above, the control method comprising: Step S100, in response to an injection command for the fuel injection device, wherein the injection command includes injection type, injection time and injection duration; Step S200: Determine the target moving position of the valve core in the fuel injection device according to the type of injection; Step S300: Control the fuel injection device to perform fuel injection based on the target position, the injection time, and the injection duration.

[0064] In this embodiment, it should be noted that the injection command is an instruction to the fuel injection device to perform fuel injection. The injection command includes at least the injection type (i.e., the target fuel to be injected, such as methanol, hydrogen, gasoline, etc.), the injection time (i.e., the time when the target fuel is injected), and the injection duration (i.e., the duration of the injection of the target fuel).

[0065] Upon receiving an injection command for the fuel injection device, this embodiment can respond to the injection command, which includes the injection type, injection time, and injection duration. The injection type, injection time, and injection duration in the injection command can be determined based on vehicle information such as temperature (e.g., water temperature, ambient temperature, emission temperature), throttle opening, emission levels, and fuel pressure of the multi-fuel vehicle using preset calculation rules. It is understood that there is a correspondence between the injection type and the target moving position. After the valve core in the fuel injection device moves to the target moving position, the fuel injection device can inject fuel of the corresponding injection type. Therefore, this embodiment can determine the target moving position corresponding to the valve core in the fuel injection device by querying the correspondence between the injection type and the target moving position. Then, based on the target position, the injection time, and the injection duration, the fuel injection device is controlled to perform fuel injection. That is, after the valve core in the fuel injection device moves to the target moving position at the injection time, the injection duration is maintained.

[0066] In one embodiment of the control method for the fuel injection device of this application, in response to an injection command for the fuel injection device, wherein the injection command includes an injection type, an injection time, and an injection duration; a target movement position of the valve core in the fuel injection device is determined according to the injection type; and the fuel injection device is controlled to perform fuel injection according to the target position, the injection time, and the injection duration. Thus, this embodiment achieves the injection of different fuel types under the same fuel injection device by moving the valve core in the fuel injection device to the corresponding target movement position according to the different injection types, reducing costs and the complexity of multi-fuel injection systems, and improving the convenience of fuel injection.

[0067] like Figure 17 As shown, Figure 17 This is a schematic diagram of the device structure of the hardware operating environment involved in the embodiments of this application. This application also proposes a control device for a fuel injection device to implement the aforementioned control method for the fuel injection device.

[0068] For example, the control device for the fuel injection device may be a VCU (Vehicle Control Unit), ECU (Electronic Control Unit), PDA (Personal Digital Assistant), PC (Personal Computer), server, or other devices.

[0069] like Figure 17As shown, the control device of the fuel injection device may include: a processor 1001, such as a central processing unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. The communication bus 1002 is used to enable communication between these components. The user interface 1003 may include a display screen or an input unit such as a keyboard; optionally, the user interface 1003 may also include a standard wired interface or a wireless interface. The network interface 1004 may optionally include a standard wired interface or a wireless interface (such as a Wi-Fi interface). The memory 1005 may be a high-speed random access memory (RAM) or a stable non-volatile memory (NVM), such as a disk drive. Optionally, the memory 1005 may also be a storage device independent of the aforementioned processor 1001.

[0070] Those skilled in the art will understand that Figure 17 The device structure shown does not constitute a limitation on the control device of the fuel injection device, and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0071] like Figure 17 As shown, the memory 1005, which serves as a computer storage medium, may include an operating system, a network communication module, a user interface module, and a control application program for the fuel injection device.

[0072] exist Figure 17 In the device shown, the network interface 1004 is mainly used to connect to the backend server and communicate data with the backend server; the user interface 1003 is mainly used to connect to the client and communicate data with the client; and the processor 1001 can be used to call the control program of the fuel injection device stored in the memory 1005 to implement the operation in the control method of the fuel injection device provided in the above embodiment.

[0073] Furthermore, this application also proposes a computer storage medium storing a computer program. When the computer program is executed by a processor, it implements the operation in the control method of the fuel injection device provided in the above embodiments. The specific steps will not be described in detail here.

[0074] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity / operation / object from another, and do not necessarily require or imply any such actual relationship or order between these entities / operations / objects; the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or system. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or system that includes that element.

[0075] For the device embodiments, since they are basically similar to the method embodiments, the description is relatively simple, and relevant details can be found in the description of the method embodiments. The device embodiments described above are merely illustrative, and the units described as separate components may or may not be physically separate. Some or all of the modules can be selected according to actual needs to achieve the purpose of this application. Those skilled in the art can understand and implement this without creative effort.

[0076] The sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0077] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above, and includes several instructions to cause a terminal device (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods described in the various embodiments of this application.

[0078] The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A fuel injection device for use in multi-fuel vehicles, characterized in that, The fuel injection device includes a connecting valve and a nozzle structure; the connecting valve includes a valve sleeve and a valve core that moves axially within the valve sleeve; The valve sleeve is provided with a fuel outlet end and at least two fuel inlet ends spaced at a preset distance, and the fuel outlet end is connected to the nozzle structure; The valve core is provided with a central through pipe, and the pipe opening of the central through pipe is provided with a one-way valve, which opens towards the fuel outlet end; The connecting valve also includes an upper cavity and a lower cavity. When the one-way valve is opened, the upper cavity, the central pipe, and the lower cavity are connected to the nozzle structure. The fuel inlet end includes a third fuel inlet, a fourth fuel inlet, and a fifth fuel inlet; the valve core of the connecting valve includes a first sub-valve core and a second sub-valve core, and a middle cavity is provided between the first sub-valve core and the second sub-valve core; The first sub-valve core is provided with a first sub-central passage pipe, and the pipe opening of the first sub-central passage pipe is provided with a first sub-check valve; The second sub-valve core is provided with a second sub-central passage pipe, and the pipe opening of the second sub-central passage pipe is provided with a second sub-check valve.

2. The fuel injection device as claimed in claim 1, characterized in that, The top and bottom ends of the valve core are respectively connected to the inner wall of the valve sleeve by return springs. The inner wall of the valve sleeve is also provided with an electromagnetic unit, which is used to control the valve core to move axially within the valve sleeve after the electromagnetic unit is energized.

3. The fuel injection device as claimed in claim 1, characterized in that, The fuel injection device further includes at least two fuel chambers, each of which is connected to the corresponding fuel inlet end on the valve sleeve of the connecting valve; The fuel input channel of the fuel chamber is connected to the fuel supply device of the multi-fuel vehicle, and the fuel return channel of the fuel chamber is connected to the fuel supply device of the multi-fuel vehicle.

4. The fuel injection device as claimed in claim 1, characterized in that, The nozzle structure is connected to the cylinder block of the engine of the multi-fuel vehicle, or to the intake passage of the engine.

5. A fuel injection device for use in multi-fuel vehicles, characterized in that, The fuel injection device includes a connecting valve and a nozzle structure; the connecting valve includes a valve sleeve and a valve core that moves axially within the valve sleeve; The valve sleeve is provided with a fuel outlet end and at least two fuel inlet ends spaced at a preset distance, and the fuel outlet end is connected to the nozzle structure; The valve core is provided with a central through pipe, and the pipe opening of the central through pipe is provided with a one-way valve, which opens towards the fuel outlet end; The connecting valve includes a first sub-connecting valve and a second sub-connecting valve. The first sub-connecting valve includes a sixth fuel inlet and a seventh fuel inlet. The second sub-connecting valve includes an eighth fuel inlet and a fuel docking port. The first sub-fuel outlet of the first sub-connecting valve is connected to the fuel docking port, and the second sub-fuel outlet of the second sub-connecting valve is connected to the nozzle structure. The first sub-connecting valve includes a third sub-valve core, and the second sub-connecting valve includes a fourth sub-valve core; the third sub-valve core is provided with a third sub-central passage pipe, and the pipe opening of the third sub-central passage pipe is provided with a third sub-check valve; the fourth sub-valve core is provided with a fourth sub-central passage pipe, and the pipe opening of the fourth sub-central passage pipe is provided with a fourth sub-check valve.

6. A control method for a fuel injection device, applied to a fuel injection device as described in any one of claims 1 to 4 or 5, the control method comprising: In response to an injection command for the fuel injection device, wherein the injection command includes injection type, injection timing and injection duration; Determine the target movement position of the valve core in the fuel injection device according to the type of injection; The fuel injection device is controlled to inject fuel based on the target's moving position, the injection time, and the injection duration.

7. A control device for a fuel injection apparatus, characterized in that, The control device of the fuel injection device includes a memory and a processor. The memory stores a computer program that can run on the processor. When the computer program is executed by the processor, it implements the steps of the control method of the fuel injection device as described in claim 6.

8. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a control program for a fuel injection device, which, when executed by a processor, implements the steps of the control method for a fuel injection device as described in claim 6.

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