Oil injection nozzle for electromagnetic oil injector

Abstract

The utility model discloses an oil nozzle for an electromagnetic oil injector. The oil nozzle comprises an oil nozzle body, the oil nozzle body is provided with a fixing part used for being embedded and fixed into the oil injection end of an electromagnetic valve of the oil injector. The fixing part is fixedly arranged on the periphery of a valve of the electromagnetic valve in a sleeving mode through a fixing hole formed in the fixing part. One end of the fixing part is connected with an oil spraying part for spraying oil; a main oil injection hole and a plurality of auxiliary oil injection holes are formed in the oil injection part; the main oil injection hole is located in the end of the oil injection part, and the multiple auxiliary oil injection holes are distributed in the peripheral side of the oil injection part. Gear rings used for improving the atomization effect of oil mist are formed on the hole walls of the main oil spraying holes and the auxiliary oil spraying holes. When the oil nozzle for the electromagnetic oil injector is used for injecting oil, the oil atomization effect is better, the injection coverage rate of oil mist is increased, and therefore the fuel oil efficiency is improved.

Description

Technical Field

[0001] The utility model relates to a fuel injection nozzle for an electromagnetic fuel injector. Background Art

[0002] When the electromagnetic coil of the electromagnetic fuel injector is energized, the generated magnetic force attracts the armature, drives the needle valve to rise, thereby opening the fuel injection valve, so that the fuel is subjected to high-pressure compression through the small space provided between the needle valve and the fuel injection nozzle, and then is ejected at high speed through the fuel injection nozzle. The existing fuel injection nozzle injects fuel through the provided injection holes. After such fuel is ejected, the speed is fast and the state is a columnar oil column, resulting in insufficient contact between the fuel and the combustion-supporting gas and low combustion efficiency. Content of the Utility Model

[0003] The utility model provides a fuel injection nozzle for an electromagnetic fuel injector to solve the above-mentioned technical problems, and specifically adopts the following technical solutions:

[0004] A fuel injection nozzle for an electromagnetic fuel injector includes: a fuel injection nozzle body; a fixing portion formed on the fuel injection nozzle body for being embedded and fixed to the solenoid valve of the fuel injector within the fuel injection end; the fixing portion is fixedly sleeved on the outer periphery of the valve of the solenoid valve through a fixing hole formed therein; one end of the fixing portion is connected with a fuel injection portion for fuel injection; the fuel injection portion is formed with a main fuel injection hole and a plurality of auxiliary fuel injection holes; the main fuel injection hole is located at the end of the fuel injection portion, and the plurality of auxiliary fuel injection holes are distributed on the circumferential side of the fuel injection portion; the pore walls of the main fuel injection hole and the auxiliary fuel injection holes are both formed with toothed rings for improving the atomization effect of the oil mist.

[0005] Further, the orifice of each of the auxiliary fuel injection holes and the main fuel injection hole is formed with a guiding wide mouth for guiding the oil mist to disperse to improve the oil mist injection coverage rate.

[0006] Further, a connecting inclined surface is formed between the fixing portion and the fuel injection portion; the slope of the guiding surface of the guiding wide mouth of the auxiliary fuel injection hole is equal to the slope of the connecting inclined surface.

[0007] Further, the tooth walls of the multiple teeth of the toothed ring are each formed with an oil guiding inclined surface for guiding more oil into the space between two adjacent teeth to increase the oil injection pressure between the teeth.

[0008] Further, the fuel injection portion is formed with a large oil outlet hole and a small oil outlet hole that are connected end to end; the main fuel injection hole is located at the end of the small oil outlet hole; the plurality of auxiliary fuel injection holes are evenly distributed on the pore wall of the large oil outlet hole.

[0009] Further, a boosting inclined surface is formed between the large oil outlet hole and the small oil outlet hole for increasing the oil pressure entering the small oil outlet hole.

[0010] Further, the sum of the cross-sectional areas of the plurality of auxiliary fuel injection holes and the cross-sectional area of the main fuel injection hole is less than or equal to the cross-sectional area of the large oil outlet hole.

[0011] Further, the extension length value of the small oil outlet hole is greater than the diameter of the large oil outlet hole.

[0012] Further, one end of the fixing portion is formed with a press-fitting surface for press-fitting the fuel injection end portion of the solenoid valve onto the outer periphery of the fixing portion with an interference fit; one end of the press-fitting surface away from the solenoid valve is formed with a pressing inclined surface that slopes upward to improve the stability of the press-fitting structure.

[0013] Further, a stepped hole for increasing the oil path travel to improve the sealing performance is formed in the fixing hole.

[0014] The beneficial effect of the present utility model is that when the fuel injector nozzle for an electromagnetic fuel injector sprays fuel, the fuel with the same flow rate can be dispersed and sprayed through a plurality of auxiliary fuel injection holes and the main fuel injection hole, and the atomization rate of the sprayed fuel can be improved through the gear ring, the fuel injection path can be dispersed, the atomization effect is better, the spraying coverage rate of the oil mist and the sufficient contact rate with the combustion-supporting gas are improved, thereby improving the fuel efficiency of the electromagnetic fuel injector. Description of the Drawings

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0016] Figure 1 It is a cross-sectional view of the fuel injector nozzle for an electromagnetic fuel injector of the present application;

[0017] Fuel injector nozzle body 10, fixing portion 11, fixing hole 111, stepped hole 112, press-fitting surface 113, pressing inclined surface 114, fuel injection portion 12, main fuel injection hole 121, auxiliary fuel injection hole 122, large oil outlet hole 123, small oil outlet hole 124, boosting inclined surface 125, gear ring 126, oil guiding inclined surface 127, guiding wide mouth 128, connecting inclined surface 13. Detailed Embodiments

[0018] The following will describe in detail the embodiments of the present application. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present application, and should not be construed as a limitation of the present application.

[0019] As Figure 1As shown in the figure, a fuel injector nozzle for an electromagnetic fuel injector of the present application includes: a fuel injector nozzle body 10. The fuel injector nozzle body 10 forms a fixing portion 11. When installed, the fixing portion 11 is embedded and fixed into the fuel injection end of the solenoid valve of the fuel injector. The fixing portion 11 further forms a fixing hole 111, and it is fixedly sleeved on the outer periphery of the valve of the solenoid valve through the fixing hole 111. One end of the fixing portion 11 is connected with a fuel injection portion 12 for fuel injection. In this way, when the needle valve is opened, high-pressure fuel is sprayed into the fuel injection portion 12 at high speed.

[0020] Further, the fuel injection portion 12 forms a main fuel injection hole 121 and a plurality of auxiliary fuel injection holes 122. The main fuel injection hole 121 is located at the end of the fuel injection portion 12, and the plurality of auxiliary fuel injection holes 122 are distributed on the circumferential side of the fuel injection portion 12. Tooth rings 126 are formed on the hole walls of the main fuel injection hole 121 and the auxiliary fuel injection holes 122 to improve the atomization effect of the oil mist.

[0021] That is to say, when the above-mentioned fuel injector nozzle for an electromagnetic fuel injector injects fuel, the fuel with the same flow rate can be dispersed and injected through the plurality of auxiliary fuel injection holes 122 and the main fuel injection hole 121, and the atomization rate of the injected oil can be improved through the tooth ring 126, the fuel injection path can be scattered, the atomization effect is better, the injection coverage rate of the oil mist and the full contact rate with the combustion-supporting gas are improved, thereby improving the fuel efficiency of the electromagnetic fuel injector.

[0022] As a specific implementation manner, guiding wide mouths 128 are formed at the orifices of the auxiliary fuel injection holes 122 and the main fuel injection hole 121. Through the guiding wide mouths 128, the oil mist can be guided to disperse to improve the injection coverage rate of the oil mist. A connecting inclined surface 13 is formed between the fixing portion 11 and the fuel injection portion 12, and the slope of the guiding surface of the guiding wide mouth 128 of the auxiliary fuel injection hole 122 is equal to the slope of the connecting inclined surface 13. With such a setting, it can be avoided that the oil mist directly sprays towards the fuel injector nozzle body 10.

[0023] As a specific implementation manner, oil guiding inclined surfaces 127 are formed on the tooth walls of the multiple teeth of the tooth ring 126. After the fuel enters the fuel injection portion 12, under the guidance of the oil guiding inclined surfaces 127, more oil will enter between two adjacent teeth, thereby increasing the fuel injection pressure between the teeth and further improving the fuel atomization rate.

[0024] As a specific implementation manner, the fuel injection part 12 is formed with a large oil outlet hole 123 and a small oil outlet hole 124 that are connected end to end. The main fuel injection hole 121 is located at the end of the small oil outlet hole 124, and a plurality of auxiliary fuel injection holes 122 are evenly distributed on the hole wall of the large oil outlet hole 123. In this way, the fuel injection position can be divided by pressure according to the positions of the auxiliary fuel injection holes 122 and the main fuel injection hole 121, so as to ensure that the fuel injection pressure at each position can reach the requirements, and to ensure the fuel injection effect. At the same time, the sum of the cross-sectional areas of the plurality of auxiliary fuel injection holes 122 and the cross-sectional area of the main fuel injection hole 121 is less than or equal to the cross-sectional area of the large oil outlet hole 123, and then the extension length value of the small oil outlet hole 124 is designed to be greater than the diameter of the large oil outlet hole 123. Such a design is also to ensure that the fuel injection pressure at each position can reach the requirements, and to ensure the fuel injection effect.

[0025] Furthermore, a pressure increasing inclined surface 125 is formed between the large oil outlet hole 123 and the small oil outlet hole 124 to be used for gradually increasing the oil pressure entering the small oil outlet hole 124, and to avoid the impact of the fuel impact on the injection efficiency of the auxiliary fuel injection holes 122.

[0026] As a specific implementation manner, one end of the fixing part 11 is formed with a press-fitting surface 113. Through the press-fitting surface 113, the fuel injection end of the solenoid valve can be press-fitted onto the outer periphery of the fixing part 11 with an interference fit. One end of the press-fitting surface 113 away from the solenoid valve is formed with an upwardly inclined pressing inclined surface 114. The locking force of the pressing inclined surface 114 can improve the stability of the press-fitting structure.

[0027] As a specific implementation manner, a stepped hole 112 is formed in the fixing hole 111. Through the stepped hole 112, the oil circuit travel can be increased to improve the sealing performance of the installation structure of the fuel injector body 10.

[0028] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the above embodiments do not limit the present invention in any form. Any technical solutions obtained by using equivalent replacements or equivalent transformations all fall within the protection scope of the present invention.

Claims

1. A fuel injection nozzle for an electromagnetic fuel injector, comprising: The fuel injection nozzle body is characterized in that: The fuel injector body is formed with a fixing portion for being embedded and fixed in the fuel injection end portion of the solenoid valve of the fuel injector; The fixing part is fixedly sleeved on the outer periphery of the valve of the solenoid valve through the fixing hole formed therein; One end of the fixing portion is connected to an oil injection portion for injecting oil; The fuel injection portion is formed with a main fuel injection hole and a plurality of auxiliary fuel injection holes; The main oil injection hole is located at the end of the oil injection portion, and the plurality of auxiliary oil injection holes are distributed around the oil injection portion; The hole walls of the main oil injection hole and the auxiliary oil injection hole are both formed with gear rings for improving the atomization effect of the oil mist.

2. The fuel injection nozzle for electromagnetic fuel injector according to claim 1, characterized in that: The auxiliary oil injection hole and the main oil injection hole are both formed with a guide wide opening for guiding the oil mist to disperse so as to improve the oil mist spray coverage.

3. The fuel injection nozzle for electromagnetic fuel injector according to claim 2, characterized in that: A connecting inclined surface is formed between the fixing portion and the oil spraying portion; The slope of the guide surface of the guide wide opening of the auxiliary oil injection hole is equal to the slope of the connecting inclined surface.

4. The fuel injection nozzle for electromagnetic fuel injector according to claim 1, characterized in that: The tooth walls of the plurality of teeth of the gear ring are each formed with an oil introduction slope for guiding more oil into between two adjacent teeth to increase the oil injection pressure between the teeth.

5. The fuel injection nozzle for electromagnetic fuel injector according to claim 1, characterized in that: The oil injection portion is formed with a large oil outlet hole and a small oil outlet hole connected end to end; The main oil injection hole is located at the end of the small oil outlet hole; The plurality of auxiliary oil injection holes are evenly distributed on the hole wall of the large oil outlet hole.

6. The fuel injection nozzle for electromagnetic fuel injector according to claim 5, characterized in that: A pressure increasing slope for increasing the oil pressure entering the small oil outlet hole is formed between the large oil outlet hole and the small oil outlet hole.

7. The fuel injection nozzle for electromagnetic fuel injector according to claim 5, characterized in that: The sum of the cross-sectional areas of the plurality of auxiliary oil injection holes and the cross-sectional area of ​​the main oil injection hole is less than or equal to the cross-sectional area of ​​the large oil outlet hole.

8. The fuel injection nozzle for electromagnetic fuel injector according to claim 5, characterized in that: The extension length of the small oil outlet hole is greater than the diameter of the large oil outlet hole.

9. The fuel injection nozzle for electromagnetic fuel injector according to claim 1, characterized in that: One end of the fixing portion is formed with a press-fitting surface for allowing the injection end of the solenoid valve to be press-fitted onto the outer periphery of the fixing portion by interference fit; An end of the press-fit surface away from the solenoid valve is formed with a pressing slope which is inclined upward to improve the stability of the press-fit structure.

10. The fuel injection nozzle for electromagnetic fuel injector according to claim 1, characterized in that: A step hole is formed in the fixing hole for increasing the oil path stroke to improve the sealing performance.

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