Oil injection nozzle for DelfF DFI2.5 type oil injector

Abstract

The utility model belongs to the field of oil nozzles, particularly relates to an oil nozzle for a DelfF DFI2.5 type oil injector, and aims to solve the problem that most existing oil nozzles are only convenient to inject oil in one direction and inconvenient to inject oil in the peripheral range in the oil injection process, so that the application range is relatively single, the following scheme is provided: the oil nozzle comprises an oil injector body, the bottom of the fuel injector body is communicated with a fuel injection nozzle body; the first spraying assembly is arranged on the oil nozzle body and used for spraying in the peripheral range; and the second spraying assembly is arranged on the oil nozzle body and used for spraying the range in front of the nozzle. When the fuel injection device is used, fuel can be injected out in the form of a peripheral range, the contact area of the fuel and air is increased, the uniformity of mixed gas is improved, the effect of conveniently injecting the fuel into the peripheral range is achieved, the application range is wide, and the applicability is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of fuel injection nozzles, in particular to a fuel injection nozzle used for a Delphi DFI2.5 fuel injector. Background Art

[0002] The fuel injector is a normally closed valve. When the electromagnetic coil is energized, suction is generated, the needle valve is sucked up, the spray hole is opened, and the fuel is sprayed out at high speed through the annular gap between the needle at the head of the needle valve and the spray hole, forming a mist, which is conducive to full combustion. The existing fuel injectors have the following problems:

[0003] Currently, since most fuel injectors are only convenient for spraying in one direction during the fuel injection process and are not convenient for spraying in the peripheral range, the application range is relatively single and the applicability is reduced;

[0004] In view of the above problems, the utility model document proposes a fuel injection nozzle for a Delphi DFI2.5 fuel injector. Utility Model Content

[0005] The utility model provides a fuel injection nozzle for a Delphi DFI2.5 fuel injector, which solves the problem in the prior art that most fuel injection nozzles can only spray in one direction during the fuel injection process and are not convenient for spraying in the peripheral range, resulting in a relatively single application range and reduced applicability.

[0006] The utility model provides the following technical solutions:

[0007] Injection nozzles for Delphi DFI2.5 injectors include:

[0008] A fuel injector body, wherein the bottom of the fuel injector body is connected to a fuel injector nozzle body, a sliding ring is slidably connected to the outer wall of the fuel injector nozzle body, a cleaning pad that fits the outer wall of the fuel injector nozzle body is provided on the inner wall of the sliding ring, and two push-pull plates are fixedly provided on the outer wall of the sliding ring;

[0009] A first injection assembly, the first injection assembly is arranged on the fuel injection nozzle body and is used for injecting to a peripheral range;

[0010] The second injection assembly is arranged on the fuel injection nozzle body and is used for injecting the range in front of the nozzle.

[0011] In a possible design, the first injection assembly includes a plurality of first fuel injection holes, and the plurality of first fuel injection holes are all opened on the outer wall of the fuel injection nozzle body, and the axes of the plurality of first fuel injection holes are all at different angles.

[0012] In a possible design, the outer wall of the fuel injector body is provided with two retaining rings, the inner walls of the two retaining rings are provided with first sealing gaskets that fit tightly with the outer wall of the fuel injector body, the two first sealing gaskets correspond to multiple first fuel injection holes, and the outer wall of each retaining ring is fixed with two connecting plates, the four connecting plates are divided into two groups, and each group of connecting plates is connected by fasteners, and each group of fasteners includes bolts and nuts.

[0013] In a possible design, the second injection assembly includes a plurality of second fuel injection holes, and the plurality of second fuel injection holes are all opened on the bottom side of the fuel injector body. A fixing ring is fixedly provided on the outer wall of the bottom end of the fuel injector body, and a threaded groove is opened at the bottom of the fixing ring.

[0014] In one possible design, a cover is provided at the bottom of the injector body, an external threaded cylinder threadedly connected to the thread groove is fixedly provided on the top of the cover, a second sealing gasket tightly fitting with the bottom side of the injector body is provided on the bottom side of the inner wall of the cover, the second sealing gasket corresponds to a plurality of second injection holes, and anti-slip grooves are provided on the outer wall of the cover.

[0015] In a possible design, the first fuel injection holes and the second fuel injection holes are all elliptical in shape.

[0016] In the present application, when the fuel injector body receives the injection signal from the engine control unit, the fuel will enter the fuel injector body through the pressure of the fuel injector body, and then be sprayed out through the multiple second fuel injection holes on the bottom side of the fuel injector body. The multiple second fuel injection holes are mainly responsible for accurately spraying the range in front of the nozzle, and can directly spray the fuel into the required range, ensuring that the fuel can be accurately and efficiently mixed with the air. When it is necessary to change the position and spray the peripheral range, at the bottom of the fuel injector body, the cover is threadedly connected with the thread groove at the bottom of the fixing ring through the external threaded barrel at its top, so that the cover can be tightly fixed. The second sealing gasket on the bottom side of the inner wall of the cover corresponds to the second fuel injection hole, which is conducive to blocking the second fuel injection hole, further enhancing the sealing of the bottom of the fuel injector body and preventing oil leakage.

[0017] After the second fuel injection hole is sealed, the fuel will be sprayed out through the multiple first fuel injection holes. Since the axes of the multiple first fuel injection holes are at different angles, the fuel can be sprayed out in the form of a peripheral range, which helps to increase the contact area between the fuel and the air, improve the uniformity of the mixture, and thus improve the combustion efficiency, thereby achieving the effect of facilitating the injection of fuel to the peripheral range, making the application range wider and improving the applicability. When it is necessary to spray the range in front of the nozzle again, the two clamping rings arranged on the outer wall of the fuel injector body can be used to connect and fix the connecting plate and the two clamping rings with fasteners, so as to achieve the effect of convenient installation and disassembly, and the inner walls of the two clamping rings are provided with the second clamping ring that fits tightly with the fuel injector body. A sealing gasket, the first sealing gasket corresponds to the first fuel injection hole, thereby ensuring that the fuel will not leak from the first fuel injection hole during the injection process, so that it can be sprayed out from the second fuel injection hole, thereby improving the use effect. Whenever the fuel injection is used up, the push-pull plate can be pushed and pulled to drive the sliding ring to slide on the outer wall of the fuel injector body, and the cleaning pad can be closely fitted with the outer wall of the fuel injector body. The back and forth movement of the cleaning pad plays a key cleaning role, which is convenient for cleaning the first fuel injection hole, preventing the fuel left in the first fuel injection hole from being easily carbonized after being heated at a high temperature, avoiding clogging of the first fuel injection hole, affecting the fuel supply pressure, and improving the applicability effect. The second fuel injection hole is easy to clean and can be directly wiped with a cleaning cloth.

[0018] In the utility model, the fuel injection nozzle for the Delphi DFI2.5 fuel injector can enable the fuel to be injected in the form of a peripheral range through the first fuel injection assembly mechanism, which helps to increase the contact area between the fuel and the air, improve the uniformity of the mixed gas, and thus improve the combustion efficiency;

[0019] In the utility model, the fuel injection nozzle for the Delphi DFI2.5 fuel injector can accurately inject the range in front of the nozzle through the second fuel injection assembly mechanism, and can directly inject the fuel into the required range, ensuring that the fuel can be accurately and efficiently mixed with the air;

[0020] In the utility model, the fuel can be sprayed out in the form of a peripheral range, which helps to increase the contact area between the fuel and the air and improve the uniformity of the mixed gas, thereby achieving the effect of facilitating the injection of fuel to the peripheral range, making the application range wider and improving the applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of the three-dimensional structure of a fuel injection nozzle for a Delphi DFI2.5 fuel injector provided by an embodiment of the utility model;

[0022] Figure 2A schematic diagram of the structure of a fuel injector body of a fuel injector for a Delphi DFI2.5 fuel injector provided by an embodiment of the utility model;

[0023] Figure 3 A schematic diagram of the disassembly structure of the fuel injection nozzle cover for a Delphi DFI2.5 fuel injector provided by an embodiment of the utility model;

[0024] Figure 4 A schematic diagram of the split structure of the retaining ring of the fuel injector nozzle for the Delphi DFI2.5 fuel injector provided by the embodiment of the utility model;

[0025] Figure 5 A schematic diagram of a sealing structure of a fuel injection nozzle for a Delphi DFI2.5 fuel injector provided in an embodiment of the utility model.

[0026] Reference numerals:

[0027] 1. Injector body; 2. Injector nozzle body; 3. Sliding ring; 4. Cleaning pad; 5. First injection hole; 6. Snap ring; 7. First sealing gasket; 8. Connecting plate; 9. Fastener; 10. Second injection hole; 11. Fixing ring; 12. Threaded groove; 13. External threaded barrel; 14. Cover; 15. Anti-slip pattern; 16. Second sealing gasket; 17. Push-pull plate. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0029] Example 1

[0030] Please refer to Figure 1-Figure 5 , fuel injector, including:

[0031] The fuel injector body 1 is connected to the fuel injector body 2 at the bottom thereof, the outer wall of the fuel injector body 2 is slidably connected to a sliding ring 3, the inner wall of the sliding ring 3 is provided with a cleaning pad 4 which fits with the outer wall of the fuel injector body 2, the outer wall of the sliding ring 3 is fixedly provided with two push-pull plates 17, the push-pull plates 17 are pushed and pulled to drive the sliding ring 3 to slide on the outer wall of the fuel injector body 2, and the cleaning pad 4 is closely fitted with the outer wall of the fuel injector body 2, and the back and forth movement of the cleaning pad 4 plays a key cleaning role, which facilitates the cleaning of the first fuel injection hole 5, prevents the fuel remaining in the first fuel injection hole 5 from being easily carbonized after being heated at a high temperature, avoids clogging of the first fuel injection hole 5, affects the fuel supply pressure, and improves the applicability effect.

[0032] The first injection assembly is arranged on the fuel injector body 2 for spraying the peripheral range. The first injection assembly includes a plurality of first fuel injection holes 5. The plurality of first fuel injection holes 5 are all opened on the outer wall of the fuel injector body 2. The axes of the plurality of first fuel injection holes 5 are all at different angles. The fuel is sprayed through the plurality of second fuel injection holes 10 on the bottom side of the fuel injector body 2. The plurality of second fuel injection holes 10 are mainly responsible for accurately spraying the range in front of the nozzle, and can directly spray the fuel into the required range, ensuring that the fuel can be accurately and efficiently mixed with the air.

[0033] The outer wall of the fuel injector body 2 is provided with two retaining rings 6, and the inner walls of the two retaining rings 6 are provided with first sealing gaskets 7 that are tightly fitted with the outer wall of the fuel injector body 2. The two first sealing gaskets 7 correspond to the multiple first fuel injection holes 5. The outer wall of each retaining ring 6 is fixedly provided with two connecting plates 8. The four connecting plates 8 are divided into two groups. Each group of connecting plates 8 is connected by fasteners 9. Each group of fasteners 9 includes bolts and nuts respectively. At the bottom of the fuel injector body 2, the cover 14 is threadedly connected with the thread groove 12 at the bottom of the fixing ring 11 through the external threaded barrel 13 at its top, so as to realize the tight fixation of the cover 14. The second sealing gasket 16 on the bottom side of the inner wall of the cover 14 corresponds to the second fuel injection hole 10, which is beneficial to block the second fuel injection hole 10, further enhancing the sealing performance of the bottom of the fuel injector body 2 to prevent oil leakage.

[0034] The second injection assembly is arranged on the nozzle body 2 for spraying the range in front of the nozzle, and the second injection assembly includes a plurality of second injection holes 10, and the plurality of second injection holes 10 are all opened on the bottom side of the nozzle body 2, and a fixing ring 11 is fixedly provided on the outer wall of the bottom end of the nozzle body 2, and a thread groove 12 is opened at the bottom of the fixing ring 11, and a cover 14 is provided at the bottom of the nozzle body 2, and an external threaded cylinder 13 threadedly connected to the thread groove 12 is fixedly provided on the top of the cover 14, and a second sealing gasket 16 tightly fitted with the bottom side of the nozzle body 2 is provided on the bottom side of the inner wall of the cover 14, and the second sealing gasket 16 corresponds to the plurality of second injection holes 10, and the outer wall of the cover 14 is provided with anti-slip grooves 15.

[0035] Since the axes of the multiple first fuel injection holes 5 are at different angles, the fuel can be sprayed out in the form of a peripheral range, which helps to increase the contact area between the fuel and the air, improve the uniformity of the mixture, and further improve the combustion efficiency, thereby achieving the effect of facilitating the injection of fuel to the peripheral range, making the application range relatively wide and improving the applicability. When it is necessary to spray the range in front of the nozzle again, the two clamping rings 6 provided on the outer wall of the fuel injector body 2 can be used to connect and fix the connecting plate 8 and the two clamping rings 6 with the fasteners 9, so as to achieve the effect of convenient installation and disassembly, and the inner walls of the two clamping rings 6 are equipped with the first sealing gasket 7 that fits tightly with the fuel injector body 2, and the first sealing gasket 7 corresponds to the first fuel injection hole 5, thereby ensuring that the fuel will not leak from the first fuel injection hole 5 during the injection process, so that it can be sprayed out from the second fuel injection hole 10.

[0036] The present application can be used in the fuel injection nozzle field, and can also be used in other fields applicable to the present application.

[0037] The model of the fuel injector body 1 is Delphi DFI2.5, and its structure and mechanism will not be described in detail here;

[0038] Example 2

[0039] refer to Figure 3 and Figure 4 , improved on the basis of the first embodiment: a fuel injector for a Delphi DFI2.5 fuel injector, which is applied to the fuel injector field;

[0040] The plurality of first fuel injection holes 5 and the second fuel injection holes 10 are both elliptical in shape. Since the two fuel injection holes are non-circular, this helps to improve the atomization quality of the fuel, enhance the mixing effect of the fuel and the air, and thus improve the combustion efficiency.

[0041] The above are only specific implementations of the utility model, but the protection scope of the utility model is not limited to them. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model; in the absence of conflicts, the embodiments of the utility model and the features in the embodiments can be combined with each other. Therefore, the protection scope of the utility model shall be based on the protection scope of the claims.

Claims

1. The fuel injection nozzle for Delphi DFI2.5 fuel injector is characterized by: include: A fuel injector body (1), wherein the bottom of the fuel injector body (1) is connected to a fuel injector nozzle body (2), the outer wall of the fuel injector nozzle body (2) is slidably connected to a sliding ring (3), the inner wall of the sliding ring (3) is provided with a cleaning pad (4) that fits the outer wall of the fuel injector nozzle body (2), and the outer wall of the sliding ring (3) is fixedly provided with two push-pull plates (17); A first injection assembly, the first injection assembly is arranged on the fuel injection nozzle body (2) and is used for injecting to a peripheral range; The second injection assembly is arranged on the fuel injection nozzle body (2) and is used for injecting to the range in front of the nozzle.

2. The fuel injection nozzle for the Delphi DFI2.5 fuel injector according to claim 1, characterized in that: The first injection assembly comprises a plurality of first oil injection holes (5), the plurality of first oil injection holes (5) are all opened on the outer wall of the oil injection nozzle body (2), and the axes of the plurality of first oil injection holes (5) are all at different angles.

3. The fuel injection nozzle for the Delphi DFI2.5 fuel injector according to claim 2, characterized in that: The outer wall of the fuel injector body (2) is provided with two retaining rings (6), and the inner walls of the two retaining rings (6) are provided with first sealing gaskets (7) that are tightly fitted with the outer wall of the fuel injector body (2). The two first sealing gaskets (7) correspond to the plurality of first fuel injection holes (5). The outer wall of each retaining ring (6) is fixedly provided with two connecting plates (8), and the four connecting plates (8) are divided into two groups. The connecting plates (8) in each group are connected by fasteners (9), and each group of fasteners (9) includes bolts and nuts.

4. The fuel injection nozzle for the Delphi DFI2.5 fuel injector according to claim 2, characterized in that: The second injection assembly comprises a plurality of second injection holes (10), and the plurality of second injection holes (10) are all arranged on the bottom side of the injection nozzle body (2). A fixing ring (11) is fixedly arranged on the outer wall of the bottom end of the injection nozzle body (2), and a threaded groove (12) is arranged at the bottom of the fixing ring (11).

5. The fuel injection nozzle for Delphi DFI2.5 fuel injector according to claim 4, characterized in that: A cover (14) is provided at the bottom of the fuel injector body (2); an external threaded cylinder (13) threadedly connected to the thread groove (12) is fixedly provided at the top of the cover (14); a second sealing gasket (16) tightly fitted to the bottom side of the fuel injector body (2) is provided on the bottom side of the inner wall of the cover (14); the second sealing gasket (16) corresponds to the plurality of second fuel injection holes (10); and an anti-slip pattern (15) is provided on the outer wall of the cover (14).

6. The fuel injection nozzle for the Delphi DFI2.5 fuel injector according to claim 5, characterized in that: The plurality of first oil injection holes (5) and second oil injection holes (10) are all elliptical in shape.

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