Low-emission gasoline engine electric control fuel injector

Abstract

The utility model discloses a low-emission gasoline engine electric control fuel injector which comprises a fuel injector body, an atomizing nozzle arranged at the bottom end of the fuel injector body and an outer connector arranged on the right side of the fuel injector body. The filter box is welded to the top end of the oil sprayer body, the oil inlet end is welded to the top end of the filter box, and the oil sprayer body, the filter box and the oil inlet end are communicated. The two outer sealing plates are arranged on the surfaces of the two sides of the filter box, filter frames are fixed to the inner sides of the two outer sealing plates and penetrate through the inner side of the filter box, and metal filter screens are further arranged on the inner sides of the filter frames; by optimizing and improving the low-emission gasoline engine electric control oil injector in the prior art, the filtering structure convenient to disassemble and assemble is designed at the oil inlet end of the oil injector, the filtering structure can be tightly integrated on the oil injector body, the path for impurities to enter the oil injector is effectively shortened, the filtering efficiency can be guaranteed, and meanwhile the filtering effect is improved. And rapid and simple dismounting operation is realized.

Description

Technical Field

[0001] This utility model belongs to the technical field of gasoline engine injectors, and specifically relates to a low-emission electronically controlled gasoline engine injector. Background Technology

[0002] As one of the most widely used engine types today, optimizing the emission performance of gasoline engines is particularly crucial. To achieve low emission targets, modern gasoline engines generally adopt advanced electronic fuel injection technology. By precisely controlling the fuel injection quantity, injection timing, and injection mode, the combustion efficiency of fuel is effectively improved, and the emission of harmful substances is significantly reduced. For example, the existing patent with publication number CN215566343U discloses "a low-emission fuel injector for an engine, including an injector body, a fuel distributor, and a filter mechanism. The upper end of the injector body is provided with a preliminary premixing chamber, the fuel distributor is disposed between the preliminary premixing chamber and the intermediate premixing chamber, and a guide vane is disposed between the intermediate premixing chamber and the final premixing chamber." It can be seen that the application describes a common low-emission electronic fuel injector, which achieves the effect of low emissions through the setting of a preliminary premixing chamber, an intermediate premixing chamber, and a final premixing chamber.

[0003] However, despite the significant environmental benefits achieved by existing electronic fuel injection technology, the problem of impurities in fuel remains a major challenge affecting the long-term stable operation of fuel injectors and maintaining low emission levels. In existing solutions, although some gasoline engines have fuel filters in the fuel supply system, these filters are usually located far from the fuel injectors, such as at the fuel tank outlet or after the fuel pump. This provides insufficient protection against small impurities at the direct inlet of the fuel injectors, and replacing the filters requires disassembling many parts, resulting in high maintenance costs and complex operations. Therefore, this utility model proposes a low-emission electronic fuel injector for gasoline engines. Utility Model Content

[0004] The purpose of this invention is to provide a low-emission electronic fuel injector for gasoline engines to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a low-emission gasoline engine electronically controlled fuel injector, comprising...

[0006] The injector body, the atomizing nozzle located at the bottom of the injector body, and the external interface located on the right side of the injector body;

[0007] And the filter box is welded to the top of the injector body, and the oil inlet is welded to the top of the filter box, and the injector body, filter box and oil inlet are connected.

[0008] And two outer sealing plates are provided on both sides of the filter box. Filter frames are fixed to the inner side of both outer sealing plates and extend through the inner side of the filter box. Metal filter screens are also provided on the inner side of the filter frames.

[0009] The filter box has a threaded ring screwed onto the surface of the oil inlet end. Movable side plates are slidably provided on both sides of the filter box, and the top of the movable side plate is rotatably connected to the threaded ring. A limiting and pressing plate that presses the outer sealing plate is fixed on the bottom surface of the movable side plate.

[0010] Preferably, rectangular slots for inserting filter frames are provided on both sides of the filter box.

[0011] Preferably, an inner support block is fixed to the inner end surface of one filter frame, and an inner support groove is provided on the inner end surface of the other filter frame for the inner support block to be inserted.

[0012] Preferably, both sides of the filter box are fixed with support blocks relative to the bottom of the movable side plate.

[0013] Preferably, the bottom surface of the oil inlet end is provided with an external thread that matches the thread on the inner wall of the threaded ring, the bottom surface of the threaded ring is provided with an annular groove, and the top of the movable side plate is fixed with a T-shaped slider, which slides within the annular groove.

[0014] Preferably, the surface of the filter box is provided with a first U-shaped groove above the rectangular inlet, and a U-shaped sealing ring is embedded in the first U-shaped groove. The surface of the U-shaped sealing ring is provided with a U-shaped sealing groove. The inner surface of the outer sealing plate is fixed with a U-shaped sealing protrusion corresponding to the U-shaped sealing groove, and the U-shaped sealing protrusion is squeezed into the U-shaped sealing groove.

[0015] Preferably, the surface of the filter frame is provided with a second U-shaped groove, and a U-shaped sealing copper gasket is embedded in the second U-shaped groove. The surface of the U-shaped sealing copper gasket is provided with two integrated U-shaped copper protrusions, and the U-shaped copper protrusions are in close contact with the inner wall of the rectangular socket.

[0016] Preferably, the inside of the U-shaped sealing copper gasket has a U-shaped cavity.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model optimizes and improves the existing low-emission gasoline engine electronic fuel injector by designing a filter structure that is easy to disassemble and install at the fuel inlet end of the injector. This filter structure can not only be tightly integrated into the injector body, effectively shortening the path of impurities into the injector, but also achieve quick and easy disassembly and installation while ensuring filtration efficiency. This allows users or maintenance personnel to clean or replace the fuel without disassembling the complex fuel lines, thereby significantly reducing emission problems caused by internal blockage of the injector and further consolidating and improving the low-emission performance of the gasoline engine. Attached Figure Description

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

[0019] Figure 2 This utility model Figure 1 A magnified view of a portion of region A in the middle;

[0020] Figure 3 This is a cross-sectional view of the filter box of this utility model;

[0021] Figure 4 This utility model Figure 3 A magnified view of a portion of region B in the middle;

[0022] In the diagram: 1. Injector body; 2. Filter box; 21. Support block; 22. Rectangular inlet; 23. U-shaped sealing ring; 231. U-shaped sealing groove; 3. Oil inlet end; 4. External interface; 5. Atomizing nozzle; 61. External sealing plate; 611. U-shaped sealing protrusion; 62. Filter frame; 621. U-shaped sealing copper gasket; 622. U-shaped copper protrusion; 63. Metal filter screen; 64. Inner support block; 65. Inner support groove; 71. Threaded ring; 72. Movable side plate; 73. Limiting and tightening plate. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Example 1

[0025] Please see Figures 1 to 4 This is the first embodiment of the present invention, which provides a technical solution: a low-emission gasoline engine electronically controlled fuel injector, comprising...

[0026] Injector body 1, atomizing nozzle 5 located at the bottom of injector body 1, and external interface 4 located on the right side of injector body 1;

[0027] The injector body 1 has a pre-mixing chamber, an intermediate pre-mixing chamber, and a final pre-mixing chamber arranged sequentially from top to bottom. A fuel distributor is arranged between the pre-mixing chamber and the intermediate pre-mixing chamber, and a guide vane is arranged between the intermediate pre-mixing chamber and the final pre-mixing chamber, thereby separating the three mixing chambers and reducing the injector's emissions to achieve a low-emission effect (not shown in the figure). All of the above structures are technologies that have been disclosed in the prior art. For the specific working principle, please refer to the existing patent with publication number CN215566343U. It will not be elaborated further here.

[0028] And the filter box 2 is welded to the top of the injector body 1, and the oil inlet 3 is welded to the top of the filter box 2, and the injector body 1, filter box 2, and oil inlet 3 are connected.

[0029] And two outer sealing plates 61 are provided on both sides of the filter box 2. Filter frames 62 are welded and fixed to the inner side of the two outer sealing plates 61, and the filter frames 62 penetrate into the inner side of the filter box 2. Metal filter screens 63 are also provided on the inner side of the filter frames 62. The two filter frames 62 that penetrate into the inner side of the filter box 2 can effectively filter the gasoline passing through the filter box 2, thereby greatly reducing the emission problems caused by the blockage inside the injector body 1.

[0030] The filter box 2 has a threaded ring 71 screwed onto the surface of the oil inlet end 3. Movable side plates 72 are slidably provided on both sides of the filter box 2. The top of the movable side plate 72 is rotatably connected to the threaded ring 71. A limiting and pressing plate 73 is welded and fixed to the bottom surface of the movable side plate 72 to press the outer sealing plate 61, ensuring the installation stability of the outer sealing plate 61 and the filter frame 62. In the future, the threaded ring 71 only needs to be screwed counterclockwise to move the movable side plate 72 and the limiting and pressing plate 73 upward, so that the outer sealing plate 61 is no longer limited. At this time, the outer sealing plate 61 and the filter frame 62 can be removed for maintenance and replacement, which makes the subsequent maintenance highly convenient.

[0031] In this embodiment, preferably, rectangular slots 22 for inserting filter frames 62 are provided on both sides of the filter box 2.

[0032] In this embodiment, preferably, an inner support block 64 is welded and fixed to the inner end surface of one filter frame 62, and an inner support groove 65 is opened on the inner end surface of the other filter frame 62 for the inner support block 64 to be inserted into, so that the inner ends of the two filter frames 62 can be connected together after being inserted into the inner side of the filter box 2, thus ensuring stability.

[0033] In this embodiment, preferably, both sides of the filter box 2 are welded and fixed with support blocks 21 relative to the bottom of the movable side plate 72, which can block and position the bottom end of the movable side plate 72, making it convenient for the subsequent threaded ring 71 to be fully tightened.

[0034] In this embodiment, preferably, the bottom surface of the oil inlet end 3 is provided with an external thread that matches the thread on the inner wall of the threaded ring 71, so that the threaded ring 71 can be smoothly rotated and twisted on the surface of the oil inlet end 3. When the threaded ring 71 is raised and lowered, it will also raise and lower the movable side plate 72 together. The bottom surface of the threaded ring 71 is provided with an annular groove, and the top of the movable side plate 72 is fixed with a T-shaped slider, and the T-shaped slider slides in the annular groove, so as to realize the smooth rotational connection between the movable side plate 72 and the threaded ring 71.

[0035] In this embodiment, preferably, the surface of the filter box 2 is provided with a first U-shaped groove above the rectangular inlet 22, and a U-shaped sealing ring 23 is embedded in the first U-shaped groove. The U-shaped sealing ring 23 is made of fluororubber, and a U-shaped sealing groove 231 is provided on the surface of the U-shaped sealing ring 23. A U-shaped sealing protrusion 611 corresponding to the U-shaped sealing groove 231 is fixed on the inner surface of the outer sealing plate 61, and the U-shaped sealing protrusion 611 is squeezed into the U-shaped sealing groove 231, so that after the outer sealing plate 61 is pressed, the U-shaped sealing protrusion 611 can be squeezed into the U-shaped sealing groove 231 to form a U-shaped sealing structure, ensuring the sealing performance of the outer sealing plate 61 after installation.

[0036] Example 2

[0037] Please see Figures 1 to 4 This is the second embodiment of the present invention. This embodiment is based on the previous embodiment, but the difference is that the surface of the filter frame 62 is provided with a second U-shaped groove, and a U-shaped sealing copper gasket 621 is embedded in the second U-shaped groove. The surface of the U-shaped sealing copper gasket 621 is provided with two integrated U-shaped copper protrusions 622. The U-shaped copper protrusions 622 are in close contact with the inner wall of the rectangular inlet 22. Since the U-shaped copper protrusions 622 and the U-shaped sealing copper gasket 621 are made of copper, they will deform when squeezed, thereby playing an effective sealing role between the filter frame 62 and the rectangular inlet 22.

[0038] In this embodiment, preferably, the inside of the U-shaped sealing copper pad 621 is provided with a U-shaped cavity, so that the U-shaped copper protrusion 622 and the U-shaped sealing copper pad 621 have sufficient deformation space when compressed.

[0039] Although embodiments of the present invention have been shown and described (see the detailed description above), it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A low emission gasoline engine electronically controlled fuel injector characterized by: The utility model provides an oil atomizer, which comprises an oil atomizer body (1), an atomizing nozzle (5) arranged at the bottom end of the oil atomizer body (1), an external interface (4) arranged at the right side of the oil atomizer body (1), a filter box (2) welded at the top end of the oil atomizer body (1), an oil inlet end (3) welded at the top end of the filter box (2), and the oil atomizer body (1), the filter box (2) and the oil inlet end (3) being in communication, two external sealing plates (61) arranged on the two side surfaces of the filter box (2), a filter frame (62) fixed to the inner side of each of the two external sealing plates (61) and penetrating into the inner side of the filter box (2), a metal filter screen (63) arranged on the inner side of the filter frame (62), a threaded screw ring (71) threadedly arranged on the surface of the oil inlet end (3), a movable side plate (72) slidingly arranged on the two side surfaces of the filter box (2) and rotationally connected to the top end of the threaded screw ring (71), and a limiting abutting plate (73) fixed to the bottom surface of the movable side plate (72) and used for pressing the external sealing plate (61). The two side surfaces of the filter box (2) are each provided with a rectangular insertion opening (22) for the filter frame (62). The inner end surface of one filter frame (62) is fixed with an inner supporting block (64), and the inner end surface of the other filter frame (62) is provided with an inner supporting groove (65) for clamping the inner supporting block (64). The two side surfaces of the filter box (2) are each fixed with a supporting block (21) relative to the bottom of the movable side plate (72). The bottom end surface of the oil inlet end (3) is provided with an external thread matched with the internal thread of the threaded screw ring (71), the bottom surface of the threaded screw ring (71) is provided with an annular sliding groove, the top end of the movable side plate (72) is fixed with a T-shaped sliding block, and the T-shaped sliding block is slidingly arranged in the annular sliding groove.

2. The low emission gasoline engine electronic control injector according to claim 1, characterized in that: The surface of the filter box (2) is provided with a first back-shaped embedding groove above the rectangular insertion opening (22), and a back-shaped sealing embedding ring (23) is embedded and arranged in the first back-shaped embedding groove, the surface of the back-shaped sealing embedding ring (23) is provided with a back-shaped sealing groove (231), the inner side surface of the external sealing plate (61) is fixed with a back-shaped sealing protrusion (611) corresponding to the back-shaped sealing groove (231), and the back-shaped sealing protrusion (611) is squeezed into the back-shaped sealing groove (231).

3. The low emission gasoline engine electronic control injector according to claim 1, characterized in that: The surface of the filter frame (62) is provided with a second back-shaped embedding groove, and a back-shaped sealing copper pad (621) is embedded and arranged in the second back-shaped embedding groove, the surface of the back-shaped sealing copper pad (621) is provided with two integral back-shaped copper protrusions (622), and the back-shaped copper protrusions (622) are in abutting contact with the inner wall of the rectangular insertion opening (22).

4. The low emission gasoline engine electronic control injector according to claim 1, characterized in that: The back-shaped sealing copper pad (621) is internally provided with a back-shaped cavity.

5. The low emission gasoline engine electronic control injector as set forth in claim 1, characterized in that: ​ 6. The low emission gasoline engine electronic control injector as set forth in claim 1, characterized in that: ​ 7. The low emission gasoline engine electronic control injector as set forth in claim 1, characterized in that: ​ 8. The low emission gasoline engine electronic control injector according to claim 7, characterized in that: ​

Images