Fuel supply system for improving oil film causing needle valve sticking

Abstract

The utility model provides an improved fuel supply system of oil film leading to needle valve sticking, including body and install lower cover on body, be provided with integral machine processing mode needle valve hole, needle valve seal valve line and oil inlet small hole on body, needle valve hole, needle valve seal valve line and oil inlet small hole coaxial arrangement, install needle valve in needle valve hole, needle valve moves along the axis of needle valve hole, needle tip of needle valve is adapted with needle valve seal valve line, and needle tip of needle valve has a separation position and a contact position respectively with needle valve seal valve line, when needle tip of needle valve is located separation position, fuel oil circuit is communicated, when needle tip of needle valve is located contact position, fuel oil circuit is disconnected, the utility model can more effectively prolong the generation of needle valve surface oil film, improve the situation of oil film leading to needle valve sticking.

Description

Technical Field

[0001] This utility model relates to a fuel supply system, and more particularly to a fuel supply system that improves the fuel supply system that improves the fuel supply system that prevents needle valve adhesion caused by oil film. Background Technology

[0002] In existing fuel supply systems, the needle valve seat is press-fitted into the needle valve seat mounting hole of the valve body. During engine operation, the needle valve moves up and down within the needle valve seat; when the engine stops, the needle valve remains stationary within the needle valve sealing hole, with the needle valve pressing against it. The needle valve, needle valve seat, and other components are immersed in fuel. The needle valve seat is made of copper, and the needle valve body is made of aluminum or copper with a nickel-plated finish. Prolonged immersion causes varying degrees of oil film, sludge, and deposits to form on the surfaces of these components. These deposits can easily adhere, leading to stiff needle valve movement and consequently, poor engine performance.

[0003] In addition, existing technologies involve machining the needle valve seat mounting hole, while the oil inlet hole is formed from a blank without machining. The needle valve seat is drilled and reamed to create the needle valve hole and the small oil inlet hole, and the needle valve sealing line is flushed. The needle valve seat is press-fitted into the mounting hole of the main body, and the needle valve is inserted into the seat and moves up and down. The supply and stop of fuel are ensured by the separation and contact between the needle tip of the needle valve and the sealing line of the needle valve seat. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a fuel supply system that improves the needle valve adhesion caused by oil film, in order to address the above-mentioned defects of the prior art.

[0005] To achieve the above objectives, this utility model provides a fuel supply system for improving needle valve adhesion caused by oil film, comprising a main body and a lower cover mounted on the main body. The main body is provided with a needle valve hole, a needle valve sealing line, and an oil inlet hole, all integrally machined. The needle valve hole, needle valve sealing line, and oil inlet hole are coaxially arranged. A needle valve is installed within the needle valve hole and moves along the axis of the needle valve hole. The needle tip of the needle valve is adapted to the needle valve sealing line, and the needle tip of the needle valve has a separated position and a contact position relative to the needle valve sealing line. When the needle tip of the needle valve is in the separated position, the fuel circuit is connected; when the needle tip of the needle valve is in the contact position, the fuel circuit is disconnected.

[0006] The aforementioned fuel supply system that improves the oil film to prevent needle valve adhesion, wherein the needle valve sealing line is located at the transition point between the needle valve orifice and the inlet orifice.

[0007] The aforementioned fuel supply system for improving fuel film to prevent needle valve adhesion, wherein the diameter of the fuel inlet orifice is smaller than the diameter of the needle valve orifice, and the diameter of the connection transition smoothly transitions from the diameter of the fuel inlet orifice to the diameter of the needle valve orifice.

[0008] The aforementioned fuel supply system that improves the oil film and prevents needle valve adhesion, wherein the main body is made of aluminum alloy.

[0009] In the aforementioned fuel supply system designed to improve fuel film and prevent needle valve adhesion, the valve body of the needle valve is made of plastic, and the needle tip of the needle valve is made of fluororubber.

[0010] The aforementioned fuel supply system for improving oil film and preventing needle valve adhesion includes a main oil well on the main body, wherein the axis of the needle valve orifice is parallel to the axis of the main oil well.

[0011] The aforementioned fuel supply system for improving oil film and preventing needle valve adhesion, wherein the main oil well and the main body are integral structural components.

[0012] The aforementioned fuel supply system for improving fuel film to prevent needle valve adhesion includes a resilient reset element provided at the lower part of the needle valve body.

[0013] The aforementioned fuel supply system for improving the fuel film that prevents needle valve adhesion includes a lower cover body and a drain hole located at the bottom of the lower cover body, wherein a drain nut is embedded in the drain hole.

[0014] The aforementioned fuel supply system for improving fuel film and preventing needle valve adhesion includes a needle valve with a conical tip, a guide structure on the valve body, and a connection between the needle tip and the valve body. The connection is a cylindrical structure with the diameter of the cylindrical structure equal to the diameter of the bottom surface of the conical structure.

[0015] The beneficial effects of this utility model are as follows:

[0016] This invention directly machines the needle valve hole, needle valve sealing line, and oil inlet hole onto the main body, forming a single-piece assembly using a combination of tools. It eliminates the need for a needle valve seat, allowing the needle valve to move up and down directly into the needle valve hole on the main body. Fuel supply and interruption are ensured by the separation and contact between the needle valve tip and the needle valve sealing line on the main body. The main body is made of aluminum alloy, while the needle valve body is made of plastic. The needle valve moves up and down within the needle valve sealing hole on the main body. The valve body is made of plastic and has no surface treatment, while the needle tip is made of fluororubber. Fuel's ability to form an oil film varies depending on the medium. Utilizing this characteristic, changing the medium can delay oil film formation and improve the problem of poor engine performance caused by oil film adhesion and sluggish needle valve movement. This method is more effective than existing fuel supply systems using copper needle valve seats and nickel-plated needle valves (aluminum or copper) in extending the formation of the surface oil film.

[0017] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the present invention. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0019] Figure 2 This is a cross-sectional view of an embodiment of the present invention;

[0020] Figure 3 This is a schematic diagram of the main body structure according to an embodiment of the present utility model;

[0021] Figure 4 for Figure 3 A sectional view;

[0022] Figure 5 This is a schematic diagram of a needle valve structure according to an embodiment of the present invention.

[0023] Among them, the attached reference numerals

[0024] 1 body

[0025] 11 needle valve holes

[0026] 12-needle valve sealing line

[0027] 13 oil inlet holes

[0028] 2 needle valve

[0029] 21 Valve body

[0030] 22 needle tips

[0031] 23 Elastic Reset Components

[0032] 24-guide structure

[0033] 25 Connecting parts

[0034] 3 bottom cover

[0035] 4 main oil wells Detailed Implementation

[0036] The structural and working principles of the present invention will be described in detail below with reference to the accompanying drawings:

[0037] See Figure 1 and Figure 2 , Figure 1 This is a structural schematic diagram of an embodiment of the present invention. Figure 2This is a cross-sectional view of an embodiment of the present invention. The fuel supply system of the present invention, which improves the fuel supply by reducing needle valve adhesion caused by oil film, includes a body 1 and a lower cover 3 mounted on the body 1. The body 1 is provided with a needle valve hole 11, a needle valve sealing line 12, and an oil inlet hole 13, all integrally machined. The needle valve hole 11, the needle valve sealing line 12, and the oil inlet hole 13 are coaxially arranged. A needle valve 2 is installed in the needle valve hole 11. The needle valve 2 moves along the axis of the needle valve hole 11. The needle tip 22 of the needle valve 2 is adapted to the needle valve sealing line 12, and the needle tip 22 of the needle valve 2 has a separated position and a contact position relative to the needle valve sealing line 12. When the needle tip 22 of the needle valve 2 is in the separated position, the fuel passage is connected; when the needle tip 22 of the needle valve 2 is in the contact position, the fuel passage is disconnected. The lower cover 3 includes a lower cover 3 body and an oil drain hole located at the bottom of the lower cover 3 body, and an oil drain nut is embedded in the oil drain hole.

[0038] In this embodiment, the needle valve sealing line 12 is located at the transition point between the needle valve orifice 11 and the oil inlet orifice 13. The diameter of the oil inlet orifice 13 is smaller than the diameter of the needle valve orifice 11, and the diameter of the transition point smoothly transitions from the diameter of the oil inlet orifice 13 to the diameter of the needle valve orifice 11. The body 1 is preferably made of aluminum alloy, the valve body 21 of the needle valve 2 is preferably made of plastic, and the needle tip 22 of the needle valve 2 is preferably made of fluororubber. An elastic reset member 23 is provided at the lower part of the valve body 21 of the needle valve 2, which is preferably a return spring.

[0039] See Figure 3 and Figure 4 , Figure 3 This is a schematic diagram of the main body 1 according to an embodiment of the present utility model. Figure 4 for Figure 3 A cross-sectional view. In this embodiment, a main oil well 4 is provided on the body 1, and the axis of the needle valve hole 11 is parallel to the axis of the main oil well 4. The main oil well 4 and the body 1 are preferably an integral structural component. The needle tip 22 of the needle valve 2 has a conical structure, and a guide structure 24 is provided on the valve body 21 of the needle valve 2. The guide structure 24 can be, for example, a guide groove or a guide ridge. A connecting part 25 is provided between the needle tip 22 of the needle valve 2 and the valve body 21 of the needle valve 2. The connecting part 25 is preferably a cylindrical structure, and the diameter of the cylindrical structure is equal to the diameter of the bottom surface of the conical structure; the connecting part 25 can also be a frustum conical structure.

[0040] This invention directly machines the needle valve hole 11, needle valve sealing line 12, and oil inlet hole 13 onto the main body 1, forming a single-piece component using a combination tool. There is no needle valve seat 2; the needle valve 2 is directly inserted into the needle valve hole 11 of the main body 1 and moves up and down. Fuel supply and shutdown are ensured by the separation and contact between the needle tip 22 of the needle valve 2 and the needle valve sealing line 12 on the main body 1. The main body 1 is made of aluminum alloy, and the valve body 21 of the needle valve 2 is made of plastic. The needle valve 2 moves up and down within the needle valve 2 sealing hole of the main body 1. The valve body 21 of the needle valve 2 is made of plastic and has no surface treatment, while the needle tip 22 is made of fluororubber. Fuel has different abilities to form an oil film on the surface of different media. Utilizing this characteristic, changing the medium can delay the formation of the oil film, improving the problem of poor engine performance caused by the adhesion of the oil film and resulting in inflexible movement of the needle valve 2. This method is more effective in prolonging the formation of the surface oil film than existing fuel supply systems with copper needle valve seats 2 and nickel-plated needle valves 2 (made of aluminum or copper).

[0041] Of course, there may be other embodiments of this utility model. Without departing from the spirit and essence of this utility model, those skilled in the art can make various corresponding changes and modifications based on this utility model, but these corresponding changes and modifications should all fall within the protection scope of the appended claims of this utility model.

Claims

1. A fuel supply system for improving needle valve adhesion caused by oil film, comprising a body and a lower cover mounted on the body, characterized in that, The main body is provided with a needle valve hole, a needle valve sealing line, and an oil inlet hole, all integrally machined. The needle valve hole, needle valve sealing line, and oil inlet hole are coaxially arranged. A needle valve is installed in the needle valve hole and moves along the axis of the needle valve hole. The needle tip of the needle valve is adapted to the needle valve sealing line, and the needle tip of the needle valve has a separation position and a contact position relative to the needle valve sealing line. When the needle tip of the needle valve is in the separation position, the fuel line is connected; when the needle tip of the needle valve is in the contact position, the fuel line is disconnected.

2. The fuel supply system for improving needle valve adhesion caused by oil film as described in claim 1, characterized in that, The needle valve sealing line is located at the transition point between the needle valve orifice and the oil inlet orifice.

3. The fuel supply system for improving needle valve adhesion caused by oil film as described in claim 2, characterized in that, The diameter of the oil inlet hole is smaller than the diameter of the needle valve hole, and the diameter of the connecting transition point smoothly transitions from the diameter of the oil inlet hole to the diameter of the needle valve hole.

4. The fuel supply system for improving fuel film adhesion leading to needle valve sticking as described in claim 1, 2, or 3, characterized in that, The main body is made of aluminum alloy.

5. The fuel supply system for improving needle valve adhesion caused by oil film as described in claim 4, characterized in that, The valve body of the needle valve is made of plastic, and the needle tip of the needle valve is made of fluororubber.

6. The fuel supply system for improving needle valve adhesion caused by oil film as described in claim 5, characterized in that, The main body is provided with a main oil well, and the axis of the needle valve hole is parallel to the axis of the main oil well.

7. The fuel supply system for improving needle valve adhesion caused by oil film as described in claim 6, characterized in that, The main oil well and the main body are an integral structural component.

8. The fuel supply system for improving needle valve adhesion caused by oil film as described in claim 5, characterized in that, The lower part of the valve body of the needle valve is provided with an elastic reset element.

9. The fuel supply system for improving needle valve adhesion caused by oil film as described in claim 5, characterized in that, The lower cover includes a lower cover body and an oil drain hole located at the bottom of the lower cover body, and an oil drain nut is embedded in the oil drain hole.

10. The fuel supply system for improving needle valve adhesion caused by oil film as described in claim 5, characterized in that, The needle tip of the needle valve has a conical structure, and a guide structure is provided on the valve body of the needle valve. A connecting part is provided between the needle tip of the needle valve and the valve body of the needle valve. The connecting part has a cylindrical structure, and the diameter of the cylindrical structure is equal to the diameter of the bottom surface of the conical structure.

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