Forward electronic actuator of fuel cut-off electromagnetic valve of fuel pump

Abstract

The utility model relates to a forward electronic actuator of a fuel cut-off electromagnetic valve of a fuel pump, which comprises a power supply component, a rear end cover, a framework, an enameled coil, a movable iron core, a drag hook and a spring, the enameled coil is wound on the framework, the rear end cover is arranged at one end of the framework, and the movable iron core is arranged at the other end of the framework. The two ends of the spring are connected with the movable iron core and the side, away from the rear end cover, of the framework respectively, and one end of the drag hook is connected to the face, away from the spring, of the movable iron core. The forward electronic actuator comprises an enameled coil and a power supply assembly, the enameled coil comprises a pull-in coil and a maintaining coil, the power supply assembly penetrates through the rear end cover and is electrically connected with the pull-in coil and the maintaining coil, and the current of the pull-in coil after being powered on is larger than that of the maintaining coil after being powered on. The coil does not need to be connected with large current for a long time, and the problems of performance reduction, valve body burning and the like caused by coil heating are avoided.

Description

Technical Field

[0001] This utility model relates to the field of fuel cut-off solenoid valve technology, specifically a positive electronic actuator for a fuel pump fuel cut-off solenoid valve. Background Technology

[0002] Existing fuel pump cut-off solenoid valves consist of an engaging coil winding and a maintaining coil winding. Their working principle is as follows: when the ignition circuit is connected, the engaging coil (current up to 28A) inside the solenoid valve generates a magnetic field, attracting the iron core and thus opening the fuel pump's fuel supply. When the ignition circuit is de-energized (engine off), the magnetic field inside the solenoid valve disappears, and the iron core returns to its original position under the action of the return spring, thereby cutting off the fuel pump's fuel supply and achieving engine shutdown. However, a key characteristic of these products is that the coil in the solenoid valve is constantly energized while the car engine is running. If this continues for too long, the coil will heat up, causing the magnetic field to weaken and leading to a decrease in product performance. Furthermore, the coil's continuous power consumption is not energy-efficient, and the engaging coil needs to be manually de-energized; otherwise, the solenoid valve's prolonged high-current operation can cause the valve body to burn out. Therefore, they are inconvenient and unsafe to use. Utility Model Content

[0003] This invention addresses the technical problems existing in the prior art by providing a positive electronic actuator for a fuel pump cut-off solenoid valve to avoid overheating caused by the coil being energized for a long time during vehicle startup.

[0004] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A positive electronic actuator for a fuel pump cut-off solenoid valve includes a power supply component, a rear end cover, a frame, an enameled coil, a moving iron core, a hook, and a spring. The enameled coil is wound on the frame. The rear end cover is disposed at one end of the frame. The two ends of the spring are respectively connected to the moving iron core and the side of the frame away from the rear end cover. One end of the hook is connected to the side of the moving iron core away from the spring. The enameled coil includes an engaging coil and a maintaining coil. The power supply component passes through the rear end cover and is electrically connected to the engaging coil and the maintaining coil respectively. The current after the engaging coil is energized is greater than the current after the maintaining coil is energized.

[0005] Furthermore, the power supply component includes a connector and a forward actuator circuit board. The connector is used to electrically connect to the ignition circuit of the vehicle and to the forward actuator circuit board. The forward actuator circuit board is electrically connected to the pull-in coil and the holding coil, respectively.

[0006] Furthermore, the current when the pull-in coil is energized is 28A, and the current when the holding coil is energized is 0.5A.

[0007] Furthermore, an actuator housing is provided outside the positive actuator circuit board.

[0008] Furthermore, the power supply component includes wires and a corrugated pipe. The wires are electrically connected to the connector and the corrugated pipe, respectively, and the corrugated pipe is electrically connected to the forward actuator circuit board.

[0009] Furthermore, the reverse actuator of the oil cut-off solenoid valve also includes a housing, the frame and the enameled coil are both disposed inside the housing, and the rear end cover is connected to one end of the housing.

[0010] Furthermore, the housing is provided with an injection hole.

[0011] Furthermore, the reverse actuator of the oil shut-off solenoid valve also includes a mounting bracket, with one end of the housing away from the rear end cover connected to the mounting bracket, and the frame and the mounting bracket secured together by cable ties.

[0012] Furthermore, one end of the hook is connected to the moving iron core via a hexagonal base.

[0013] Furthermore, a dust cover is fitted on the outer side of the spring.

[0014] The beneficial effects of this utility model are as follows: when the car is off, the hook is set in the position where the oil circuit is disconnected, and when the car is started, the power supply component is used to supply power to the enameled coil, thereby enabling the moving iron core to drive the hook to move, thereby connecting the oil circuit. After connecting the oil circuit, the power supply to the coil is cut off within a predetermined time (2 seconds). The oil circuit is kept connected by maintaining the position of the moving iron core only by maintaining the coil. This means that the coil does not need to be connected to a large current for a long time, avoiding problems such as performance degradation and valve body burnout caused by coil overheating. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the forward electronic actuator of the oil interruption solenoid valve of this utility model;

[0016] Figure 2 This is a schematic diagram of the circuit structure of the forward actuator circuit board;

[0017] Explanation of reference numerals in the attached figures:

[0018] 1. Connector; 2. Wire; 3. Corrugated pipe; 4. Actuator housing; 5. Rear end cover; 6. Housing; 7. Frame; 8. Enamelled coil; 9. Mounting bracket; 10. Cable tie; 11. Dust cover; 12. Moving iron core; 13. Hexagonal base; 14. Hook; 15. Spring; 16. Forward actuator circuit board; 17. Potting hole. Detailed Implementation

[0019] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0020] It should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integrally formed structures. Those skilled in the art can understand the specific meaning of these terms in this patent based on the specific circumstances.

[0021] like Figure 1-2 As shown, the present invention provides a positive electronic actuator for a fuel pump cut-off solenoid valve, including a power supply component, a rear end cover 5, a frame 7, an enameled coil 8, a moving iron core 12, a hook 14 and a spring 15. The enameled coil 8 is wound on the frame 7. The rear end cover 5 is located at one end of the frame 7. The two ends of the spring 15 are respectively connected to the moving iron core 12 and the side of the frame 7 away from the rear end cover 5. One end of the hook 14 is connected to the side of the moving iron core 12 away from the spring 15.

[0022] The enameled coil 8 includes a pull-in coil and a holding coil. The power supply component passes through the rear end cover 5 and is electrically connected to the pull-in coil and the holding coil respectively. The current after the pull-in coil is energized is greater than the current after the holding coil is energized.

[0023] It is understandable that the power supply component is electrically connected to the car battery and supplies power to the pull-in coil and the holding coil respectively when the car is started. After the pull-in coil is energized, it generates an electromagnetic field and forms a magnetic attraction force to attract the moving iron core 12 to move and compress the spring 15, thereby driving the hook 14 to move and connect the oil circuit. After the oil circuit is connected, the power supply to the pull-in coil is cut off, and the position of the moving iron core 12 is maintained by the holding coil with a small current. While ensuring the oil circuit is connected, it can also avoid the coil from overheating due to the continuous supply of a large current.

[0024] In this embodiment, initially, the fuel pump's fuel line is disconnected. When the power supply component supplies power to the coil, the coil generates an electromagnetic field, creating a magnetic attraction that pulls the moving iron core 12 towards the rear end cover 5. At this time, the spring 15 is compressed, and the hook 14 moves along with the moving iron core 12, connecting the fuel line and achieving the purpose of fuel supply for vehicle ignition. That is, when the vehicle is ignited, the coil is energized, and the hook 12 moves to connect the fuel line. When the fuel line is connected, the power supply component stops supplying power to the coil, maintaining the position of the moving iron core 12 by the magnetic attraction generated by the coil, thus keeping the fuel line connected. Until the vehicle is turned off, the power supply component stops supplying power, the electromagnetic field of the enameled coil 8 disappears, the magnetic attraction also disappears, the moving iron core 12 returns to its original position under the action of the spring 15, and the hook 14 also moves back to its original position, disconnecting the fuel line and achieving the purpose of turning off the vehicle.

[0025] As can be understood, with the above settings, during vehicle operation, the coil will only be energized for a predetermined period (2 seconds) immediately after the car is started. Afterward, a small current is used to maintain the coil's energization, preventing excessive heating due to prolonged high current flow, thus avoiding impact on product performance, increasing product lifespan, and conserving engine battery power. Furthermore, there is no need to manually disconnect the coil.

[0026] Furthermore, the power supply assembly includes a connector 1 and a forward actuator circuit board 16. The connector 1 is used to electrically connect to the ignition circuit of the vehicle and to the forward actuator circuit board 16. The forward actuator circuit board 16 is electrically connected to the pull-in coil and the holding coil, respectively.

[0027] It is understandable that the forward actuator circuit board 16 achieves the effect of first supplying power to the coil during the predetermined time of car ignition, and then disconnecting the coil after the predetermined time.

[0028] Furthermore, the current when the pull-in coil is energized is 28A, and the current when the holding coil is energized is 0.5A.

[0029] Furthermore, an actuator housing 4 is provided outside the forward actuator circuit board 16.

[0030] Furthermore, the power supply component includes a wire 2 and a bellows 3. The wire 2 is electrically connected to the connector 1 and the bellows 3 respectively, and the bellows 3 is electrically connected to the forward actuator circuit board 16.

[0031] It is understandable that the circuit diagram of the forward actuator circuit board 16 is as follows: Figure 2 As shown.

[0032] Furthermore, the reverse actuator of the oil shut-off solenoid valve also includes a housing 6, a frame 7 and an enameled coil 8, all housed inside the housing 6, with the rear end cover 5 connected to one end of the housing 6.

[0033] Furthermore, the housing 6 is provided with a glue-filling hole 17.

[0034] It is understandable that the glue-filling hole 17 is used to fill AB glue. A and B silicone are mixed in a 1:1 ratio and poured into the space between the housing 6 and the enameled coil 8 through the glue-filling hole 17 to achieve waterproofing, oil resistance, and vibration resistance. If the enameled coil 8 is in direct contact with the housing 6, external factors such as vibration may cause the enameled coil to peel off, resulting in a short circuit. It can also prevent water from entering the valve body and causing the coil to short circuit and burn out.

[0035] Furthermore, the reverse actuator of the oil shut-off solenoid valve also includes a mounting bracket 9, with one end of the housing 6 away from the rear end cover 5 connected to the mounting bracket 9.

[0036] Furthermore, the frame 7 and the mounting bracket 9 are secured together with cable ties 10.

[0037] Furthermore, one end of the hook 14 is connected to the moving iron core 12 via the hexagonal base 13.

[0038] Furthermore, a dust cover 11 is fitted on the outside of the spring 15.

[0039] It is understandable that the moving iron core 12 moves within the dust cover 11 under the action of magnetic attraction to compress or release the spring 15.

[0040] As can be seen from the above, this utility model sets the hook in the oil circuit disconnected position when the car is off, and uses the power supply component to supply power to the enameled coil when the car is started, so that the moving iron core drives the hook to move, thereby connecting the oil circuit. After connecting the oil circuit, the power supply to the coil is cut off within a predetermined time (2 seconds). The oil circuit is kept connected by maintaining the position of the moving iron core only by maintaining the coil. This means that the coil does not need to be connected to a large current for a long time, avoiding problems such as performance degradation and valve body burnout caused by coil overheating.

[0041] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus 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 apparatus. Unless otherwise expressly specified and limited, the terms "installed," "connected," or "linked" should be interpreted broadly, for example, as a fixed connection, a detachable connection, or an integral connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection via an intermediate medium; or a connection within two elements. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0042] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.

[0043] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A positive electronic actuator for a fuel pump cut-off solenoid valve, characterized in that, include: The power supply component includes a rear end cover, a frame, an enameled coil, a moving iron core, a hook, and a spring. The enameled coil is wound around the frame. The rear end cover is located at one end of the frame. The two ends of the spring are respectively connected to the moving iron core and the side of the frame away from the rear end cover. One end of the hook is connected to the side of the moving iron core away from the spring. The enameled coil includes an engaging coil and a sustaining coil. The power supply component passes through the rear end cover and is electrically connected to the engaging coil and the sustaining coil respectively. The current of the engaging coil after being energized is greater than the current of the sustaining coil after being energized.

2. The positive electronic actuator for a fuel pump cut-off solenoid valve as described in claim 1, characterized in that: The power supply component includes a connector and a forward actuator circuit board. The connector is used to electrically connect to the ignition circuit of the vehicle and to the forward actuator circuit board. The forward actuator circuit board is electrically connected to the pull-in coil and the holding coil, respectively.

3. The positive electronic actuator for a fuel pump cut-off solenoid valve as described in claim 1, characterized in that: The current when the pull-in coil is energized is 28A, and the current when the holding coil is energized is 0.5A.

4. The positive electronic actuator for a fuel pump cut-off solenoid valve as described in claim 2, characterized in that: The positive actuator circuit board is surrounded by an actuator housing.

5. The positive electronic actuator for a fuel pump cut-off solenoid valve as described in claim 2, characterized in that: The power supply component includes wires and a corrugated pipe. The wires are electrically connected to the connector and the corrugated pipe, respectively, and the corrugated pipe is electrically connected to the forward actuator circuit board.

6. The positive electronic actuator for a fuel pump cut-off solenoid valve as described in claim 1, characterized in that: The reverse actuator of the oil cut-off solenoid valve also includes a housing, the frame and the enameled coil are both disposed inside the housing, and the rear end cover is connected to one end of the housing.

7. The positive electronic actuator for a fuel pump cut-off solenoid valve as described in claim 6, characterized in that: The housing is provided with a glue-filling hole.

8. The positive electronic actuator for a fuel pump cut-off solenoid valve as described in claim 6, characterized in that: The reverse actuator of the oil shut-off solenoid valve also includes a mounting bracket, and the end of the housing away from the rear end cover is connected to the mounting bracket. The frame is fastened to the mounting bracket by cable ties.

9. The positive electronic actuator for a fuel pump cut-off solenoid valve as described in claim 1, characterized in that: One end of the hook is connected to the moving iron core via a hexagonal base.

10. The positive electronic actuator for a fuel pump cut-off solenoid valve as described in claim 1, characterized in that: A dust cover is fitted on the outside of the spring.

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