External electronic injection fuel pump

Abstract

The utility model relates to an electronic injection external fuel pump which comprises an outer shell provided with radiating fins, a direct-current brushless water pump is installed inside the outer shell, and an oil pressure sensor is installed on a liquid outlet of the direct-current brushless water pump. The direct-current brushless water pump is adopted, the size is small, the direct-current brushless water pump is installed on the outer shell with the cooling fins, heat dissipation is achieved through the cooling fins, the heat dissipation structure is simple, the temperature of the direct-current brushless water pump can be prevented from being higher than an allowable value, and bubbling of pumped oil liquid is avoided; according to the electronic injection external fuel pump, the heat dissipation structure is improved, external installation of the fuel pump can be achieved, and the fuel pump does not need to be arranged in an oil pool of a vehicle oil tank for heat dissipation. Oil in the liquid outlet of the direct-current brushless water pump flows through the oil pressure sensor for oil pressure induction, the rotating speed of the direct-current brushless water pump is reduced when the oil pressure is larger than a set value, the rotating speed of the direct-current brushless water pump is increased when the oil pressure is lower than the set value, real-time oil pressure adjustment can be achieved, and oil pressure control is accurate.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of electric injection external fuel pump. BACKGROUND

[0002] Fuel pump is one of the basic components of electric injection automobile fuel injection system, and the fuel pump of prior art adopts brush pump.

[0003] On the one hand, brush pump not only has large volume, but also if the temperature of fuel pump is higher than the allowable value, it will make the oil pumped to be bubbled, and further affect the normal oil injection of oil injection nozzle. Therefore, in order to dissipate heat, brush pump needs to be installed inside the vehicle tank and soaked in oil pool for heat dissipation. This heat dissipation mode has complex structure, cumbersome installation and high cost.

[0004] On the other hand, the speed of brush pump is fixed and cannot be adjusted, and only when the oil pressure is large enough, the brush pump can automatically release pressure. This oil pressure adjustment mode is not reasonable enough, and the oil pressure control is not accurate enough, which is difficult to adjust in real time.

[0005] Therefore, in order to solve the above technical problems, the utility model provides a kind of electric injection external fuel pump. CONTENT OF UTILITY MODEL

[0006] In view of the deficiencies of prior art, the utility model solves the technical problem to provide a kind of electric injection external fuel pump.

[0007] In order to solve the above technical problems, the technical scheme of the utility model is as follows: a kind of electric injection external fuel pump, comprising a shell body provided with heat dissipation fins, a DC brushless water pump is installed in the inside of the shell body, and an oil pressure sensor is installed on the liquid outlet of the DC brushless water pump.

[0008] Preferably, the number of heat dissipation fins has several pieces and is fixed on the outer peripheral surface of the shell body.

[0009] Preferably, the inside of the shell body is provided with an installation inner cavity of the DC brushless water pump, one end of the installation inner cavity is fixedly connected with a liquid inlet end cover, and the other end is fixedly connected with a liquid outlet end cover.

[0010] Preferably, a liquid inlet pipe joint is arranged on the liquid inlet end cover, and the inner cavity of the liquid inlet end cover is communicated with the liquid inlet of the DC brushless water pump.

[0011] Preferably, the liquid inlet end cover is composed of a front end cover and a rear end cover, the inner cavity of the liquid inlet end cover is located between the front end cover and the rear end cover, a sealing ring is arranged in the joint between the front end cover and the rear end cover, the liquid inlet pipe joint is fixed on the front end cover, and the liquid inlet of the DC brushless water pump is connected to the inner cavity of the liquid inlet end cover through the rear end cover.

[0012] Preferably, the liquid inlet cap is fastened to the end of the outer shell by bolts, which pass through the front cap and the rear cap in sequence and are then screwed and locked to one end of the outer shell.

[0013] Preferably, the outlet end cap is provided with an outlet pipe connector, the outlet of the DC brushless water pump is connected to one end of the inner cavity of the outlet end cap, the sensing head of the oil pressure sensor is installed at the other end of the inner cavity of the outlet end cap, and the outlet pipe connector is vertically connected to the inner cavity of the outlet end cap between the outlet of the DC brushless water pump and the sensing head of the oil pressure sensor.

[0014] Preferably, an oil pressure sensor mounting chamber is provided on the outer end of the liquid outlet cap. The mounting chamber and the inner cavity of the liquid outlet cap are sealed by the sensing head of the oil pressure sensor. The sensing head of the oil pressure sensor is locked in the mounting chamber by bolts and a sealing ring is provided at the joint. A controller is also installed inside the mounting chamber. The oil pressure sensor is electrically connected to the input terminal of the controller. The DC brushless water pump is electrically connected to the output terminal of the controller. A sealing cover plate is provided on the mounting chamber.

[0015] Preferably, the liquid outlet cap is fastened to the end of the outer shell by bolts, and the bolts pass through the sealing cover plate and the liquid outlet cap in sequence and are then screwed and locked to the other end of the outer shell.

[0016] Preferably, the external fuel injection pump further includes a controller, the oil pressure sensor is electrically connected to the input terminal of the controller, and the DC brushless water pump is electrically connected to the output terminal of the controller.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. This external fuel injection pump uses a DC brushless water pump, which is not only compact in size, but also mounted on an outer casing with heat dissipation fins. The heat dissipation structure is simple and can prevent the temperature of the DC brushless water pump from exceeding the allowable value, thus preventing the pumped oil from bubbling.

[0019] 2. The improved cooling structure of this external fuel pump enables external installation of the fuel pump, eliminating the need to house the fuel pump within the fuel sump of the vehicle's fuel tank for cooling.

[0020] 3. The oil flowing from the outlet of the DC brushless water pump passes through an oil pressure sensor for oil pressure sensing. When the oil pressure is greater than the set value, the speed of the DC brushless water pump decreases; when the oil pressure is lower than the set value, the speed of the DC brushless water pump increases. This enables real-time oil pressure adjustment and precise control of oil pressure.

[0021] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0022] Figure 1 This is a perspective view of an embodiment of the present utility model.

[0023] Figure 2 This is a top view of an embodiment of the present utility model.

[0024] Figure 3 for Figure 2 AA sectional view.

[0025] Figure 4 for Figure 2 BB cross-sectional view.

[0026] Figure 5 This is an exploded view of an embodiment of the present invention.

[0027] Figure 6 This is a cross-sectional view of the connection between the DC brushless water pump and the outlet end cap.

[0028] In the diagram: 1. Heat dissipation fins; 2. Outer casing; 3. DC brushless water pump; 4. Oil pressure sensor; 5. Mounting cavity; 6. Inlet end cap; 7. Outlet end cap; 8. Inlet pipe connector; 9. Inlet of DC brushless water pump; 10. Front end cap; 11. Rear end cap; 12. Inlet cavity of inlet end cap; 13. Sealing ring; 14. Bolt; 15. Outlet pipe connector; 16. Inlet cavity of outlet end cap; 17. Mounting chamber; 18. Controller; 19. Sealing cover plate; 20. Detailed Implementation

[0029] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0030] It should be noted that the following detailed descriptions are exemplary and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0031] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0032] like Figures 1-6 As shown, this embodiment provides an external fuel injection pump, including an outer housing 2 with heat dissipation fins 1, a DC brushless water pump 3 installed inside the outer housing, and an oil pressure sensor 5 installed on the outlet 4 of the DC brushless water pump.

[0033] In this embodiment of the invention, the heat dissipation fins are a plurality of pieces and are fixed on the outer peripheral surface of the outer casing.

[0034] In this embodiment of the utility model, the housing is provided with an inner cavity 6 for mounting a DC brushless water pump. One end of the inner cavity is fixedly connected to an inlet cap 7, and the other end is fixedly connected to an outlet cap 8.

[0035] In this embodiment of the utility model, the liquid inlet end cap is provided with a liquid inlet pipe connector 9, and the inner cavity of the liquid inlet end cap is connected to the liquid inlet 10 of the DC brushless water pump.

[0036] In this embodiment of the utility model, the liquid inlet end cap is composed of a front end cap 11 and a rear end cap 12. The inner cavity 13 of the liquid inlet end cap is located between the front and rear end caps, and a sealing ring 14 is provided at the joint between the front and rear end caps. The liquid inlet pipe connector is fixed on the front end cap, and the liquid inlet of the DC brushless water pump is connected to the rear end cap and communicates with the inner cavity of the liquid inlet end cap.

[0037] In this embodiment of the utility model, the liquid inlet end cap is fastened to the end of the outer shell by bolts 15. The bolts pass through the front end cap and the rear end cap in sequence and are then screwed and locked to one end of the outer shell.

[0038] In this embodiment of the utility model, the liquid outlet end cap is provided with a liquid outlet pipe connector 16, the liquid outlet of the DC brushless water pump is connected to one end of the inner cavity 17 of the liquid outlet end cap, the sensing head of the oil pressure sensor is installed at the other end of the inner cavity of the liquid outlet end cap, and the liquid outlet pipe connector is vertically connected to the inner cavity of the liquid outlet end cap between the liquid outlet of the DC brushless water pump and the sensing head of the oil pressure sensor.

[0039] In this embodiment of the utility model, an oil pressure sensor mounting chamber 18 is provided on the outer end of the liquid outlet cap. The mounting chamber and the inner cavity of the liquid outlet cap are sealed by the sensing head of the oil pressure sensor. The sensing head of the oil pressure sensor is locked in the mounting chamber by bolts and a sealing ring is provided at the joint. A controller 19 is also installed inside the mounting chamber. The oil pressure sensor is electrically connected to the input terminal of the controller. The DC brushless water pump is electrically connected to the output terminal of the controller. A sealing cover plate 20 is provided on the mounting chamber.

[0040] In this embodiment of the utility model, the liquid outlet cap is fastened to the end of the outer shell by bolts, and the bolts pass through the sealing cover plate and the liquid outlet cap in sequence and are then screwed and locked to the other end of the outer shell.

[0041] In this embodiment of the invention, a sealing ring is provided between the outlet of the DC brushless water pump and the inner cavity of the outlet end cap.

[0042] In this embodiment of the invention, the bolts of the inlet and outlet liquid end caps are distributed at the four corners of the outer shell.

[0043] In this embodiment of the utility model, the external fuel injection pump further includes a controller, the oil pressure sensor is electrically connected to the input terminal of the controller, and the DC brushless water pump is electrically connected to the output terminal of the controller.

[0044] In this embodiment of the utility model, a wire hole 21 is provided on the side of the liquid outlet cap for the power cord of the DC brushless water pump to pass through and connect to the power source.

[0045] In this embodiment of the invention, the working principle of the external electronic fuel injection pump is as follows: the inlet pipe connector is connected to the fuel tank, and the outlet pipe connector is connected to the fuel injector of the vehicle's fuel injection system. The fuel is pumped by a DC brushless water pump. The fuel at the outlet of the DC brushless water pump flows through an oil pressure sensor for oil pressure sensing. When the oil pressure is greater than a set value, the speed of the DC brushless water pump decreases; when the oil pressure is lower than the set value, the speed of the DC brushless water pump increases, enabling real-time adjustment of oil pressure and precise control of oil pressure.

[0046] The DC brushless water pump is not only compact in size, but also features a heat dissipation finned housing for heat dissipation. This simple heat dissipation structure helps prevent the DC brushless water pump from exceeding its allowable temperature and avoids oil aeration during pumping.

[0047] The improved cooling structure of this external fuel pump enables external installation of the fuel pump, eliminating the need to house it within the fuel sump of the vehicle's fuel tank for cooling.

[0048] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from its technical solution shall still fall within the protection scope of this utility model.

Claims

1. An external fuel pump with electronic fuel injection, characterized in that: The device includes an outer casing with heat dissipation fins, a DC brushless water pump installed inside the outer casing, and an oil pressure sensor installed on the outlet of the DC brushless water pump; the external fuel injection pump also includes a controller, the oil pressure sensor is electrically connected to the input terminal of the controller, and the DC brushless water pump is electrically connected to the output terminal of the controller.

2. The external fuel pump with electronic fuel injection according to claim 1, characterized in that: The heat dissipation fins are a number of pieces and are fixed on the outer peripheral surface of the outer casing.

3. The external fuel injection pump according to claim 1, characterized in that: The outer casing has an internal cavity for mounting a DC brushless water pump. One end of the mounting cavity is fixedly connected to an inlet cap, and the other end is fixedly connected to an outlet cap.

4. The external fuel pump with electronic fuel injection according to claim 3, characterized in that: The liquid inlet end cap is equipped with a liquid inlet pipe connector, and the inner cavity of the liquid inlet end cap is connected to the liquid inlet of the DC brushless water pump.

5. The external fuel injection pump according to claim 4, characterized in that: The liquid inlet end cap consists of a front end cap and a rear end cap. The inner cavity of the liquid inlet end cap is located between the front and rear end caps, and a sealing ring is provided at the joint between the front and rear end caps. The liquid inlet pipe connector is fixed on the front end cap, and the liquid inlet of the DC brushless water pump is connected to the rear end cap and communicates with the inner cavity of the liquid inlet end cap.

6. The external fuel pump with electronic fuel injection according to claim 5, characterized in that: The liquid inlet cap is fastened to the end of the outer shell by bolts, which pass through the front cap and the rear cap in sequence and are then screwed and locked to one end of the outer shell.

7. The external fuel pump with electronic fuel injection according to claim 3, characterized in that: The liquid outlet cap is provided with a liquid outlet pipe connector. The liquid outlet of the DC brushless water pump is connected to one end of the inner cavity of the liquid outlet cap. The sensing head of the oil pressure sensor is installed at the other end of the inner cavity of the liquid outlet cap. The liquid outlet pipe connector is vertically connected to the inner cavity of the liquid outlet cap between the liquid outlet of the DC brushless water pump and the sensing head of the oil pressure sensor.

8. The external fuel injection pump according to claim 7, characterized in that: The outer end of the liquid outlet cap is provided with an installation chamber for an oil pressure sensor. The installation chamber and the inner cavity of the liquid outlet cap are sealed by the sensing head of the oil pressure sensor. The sensing head of the oil pressure sensor is locked in the installation chamber by bolts and a sealing ring is provided at the joint. A controller is installed inside the installation chamber, and a sealing cover plate is provided on the installation chamber.

9. The external fuel pump with electronic fuel injection according to claim 8, characterized in that: The liquid outlet cap is fastened to the end of the outer shell by bolts. The bolts pass through the sealing cover and the liquid outlet cap in sequence and are then screwed and locked to the other end of the outer shell.

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