High-pressure diesel electronic injection injector

Abstract

The utility model relates to the technical field of high-pressure diesel electronic injection oil injectors, in particular to a high-pressure diesel electronic injection oil injector which comprises an oil inlet pipe and a cap, the outer wall of the oil inlet pipe is in threaded connection with the inner wall of the cap, the left side of the oil inlet pipe is communicated with an electronic injection oil injector, and the inner wall of the electronic injection oil injector is connected with a control structure. The top of the electronic injection fuel injector is connected with a supporting structure, when a fuel injection signal is finished, driving force acting on the oil pressure plunger is reduced, at the moment, the spring in a pre-compression state releases elastic force and pushes the guide sleeve and the ejector rod upwards, the ejector rod drives the oil pressure plunger to reset, and when the spring is compressed and rebounded, the lantern ring and the vertical cylinder increase the space of the inner wall of the spring, so that the fuel injection effect is improved. The inner wall of the spring and an inner wall rod piece of the electronic fuel injector can be prevented from being abraded, the deformation flexibility of the spring in the fuel injector is prevented from being reduced, and elastic force transmission stability is guaranteed.

Description

Technical Field

[0001] This utility model relates to the technical field of high-pressure diesel electronic fuel injectors, specifically a high-pressure diesel electronic fuel injector. Background Technology

[0002] High-pressure diesel electronic fuel injectors are the core components of modern diesel engine fuel systems. Their core function is to optimize the combustion process by precisely controlling fuel injection parameters, thereby improving power performance, fuel economy, and reducing emissions.

[0003] For example, a nozzle with authorization announcement number "CN206221122U" is described. This nozzle comprises an injector body, a nozzle assembly, a hydraulic plunger, a push rod, a pressure regulating spring, a spring adjusting pad, a guide sleeve, and an adjusting pad. The push rod in this nozzle uses a two-end guided design, resulting in good flexibility and smoothness of movement. However, during use, the section on the push rod used to mount the pressure regulating spring has a uniform diameter, and the gap between the inner wall of the spring and the surface of the push rod is insufficient. When the pressure regulating spring compresses or reverts during operation, the inner wall of the spring easily rubs directly against the surface of the push rod. This not only increases the resistance to spring movement but also reduces the flexibility of spring deformation inside the injector, leading to unstable spring force transmission. Utility Model Content

[0004] The purpose of this invention is to solve the problem of decreased flexibility of spring deformation inside the injector, resulting in unstable spring force transmission, and proposes a high-pressure diesel electronic injection injector.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] Design a high-pressure diesel electronic fuel injector, including an inlet pipe and a cap. The outer wall of the inlet pipe is threadedly connected to the inner wall of the cap. The left side of the inlet pipe is connected to the electronic fuel injector. The inner wall of the electronic fuel injector is connected to a control structure. The top of the electronic fuel injector is connected to a support structure.

[0007] Preferably, the control structure includes a collar and a spring, the inner wall of the collar is fixedly connected to the inner wall piston of the electronic fuel injector, the outer wall of the collar is fixedly connected to the bottom of the spring, and a vertical cylinder is attached to the upper part of the inner wall of the spring.

[0008] Preferably, a circular plate is fixed to the top of the vertical cylinder.

[0009] Preferably, the bottom of the circular plate is fixedly connected to the top of the spring, and the outer wall of the circular plate is fixedly connected to the inner wall of the electronic fuel injector.

[0010] Preferably, the top of the electronic fuel injector is electrically connected with a wire.

[0011] Preferably, the support structure includes a bent rod and a cylinder, the bottom of the bent rod is fixedly connected to the top of the electronic fuel injector, the inner end of the bent rod is fixedly connected to the outer wall of the cylinder, and the top of the cylinder is connected to a curved groove.

[0012] Preferably, the inner wall of the cylinder is fixedly connected to the outer wall of the wire.

[0013] The high-pressure diesel electronic fuel injector proposed in this utility model has the following advantages: When the thrust of the push rod in the control structure overcomes the preload of the spring, the needle valve is pushed open, the injection orifice channel of the fuel injector assembly is opened, and finally the fuel injector is sprayed into the combustion chamber in an atomized state from the injection orifice of the fuel injector assembly. When the injection signal ends, the driving force acting on the hydraulic plunger decreases. At this time, the spring in the pre-compressed state releases its elastic force, pushing the guide sleeve and push rod upward. The push rod then drives the hydraulic plunger to reset. At this time, when the spring is compressed and rebounded, the collar and vertical cylinder increase the space inside the spring, which can prevent the inner wall of the spring from wearing with the inner wall rod of the electronic fuel injector, prevent the spring deformation flexibility inside the injector from decreasing, and ensure stable elastic force transmission. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 for Figure 1 A schematic diagram showing the connection structure of the central oil inlet pipe, cap, and electronic fuel injector;

[0016] Figure 3 for Figure 1 A schematic diagram showing the connection relationship between the middle collar, spring, and vertical cylinder;

[0017] Figure 4 for Figure 2 A schematic diagram of the structure of A in the middle;

[0018] Figure 5 for Figure 2 A schematic diagram of the structure of B in the middle.

[0019] In the diagram: 1. Oil inlet pipe, 2. Control structure, 201. Collar, 202. Spring, 203. Vertical cylinder, 3. Support structure, 301. Bent rod, 302. Cylinder, 303. Curved groove, 4. Cap, 5. Electronic fuel injector, 6. Wire, 7. Circular plate. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings:

[0021] Please see Figure 1-5In this embodiment, a high-pressure diesel electronic fuel injector includes an inlet pipe 1 and a cap 4. The outer wall of the inlet pipe 1 is threadedly connected to the inner wall of the cap 4. The inner wall of the cap 4 is threaded and can be screwed into the thread on the outer wall of the inlet pipe 1. An electronic fuel injector 5 is connected to the left side of the inlet pipe 1. The electronic fuel injector 5 is model BEBE-D25. A control structure 2 is connected to the inner wall of the electronic fuel injector 5, and a support structure 3 is connected to the top of the electronic fuel injector 5.

[0022] The control structure 2 includes a collar 201 and a spring 202. The inner wall of the collar 201 is fixedly connected to the inner wall piston of the electronic fuel injector 5, and the outer wall of the collar 201 is fixedly connected to the bottom of the spring 202. After the collar 201 moves upward under force, it rebounds due to the elastic force of the spring 202. A vertical cylinder 203 is attached to the upper part of the inner wall of the spring 202. A circular plate 7 is fixedly connected to the top of the vertical cylinder 203. The bottom of the circular plate 7 is fixedly connected to the top of the spring 202, and the outer wall of the circular plate 7 is fixedly connected to the inner wall of the electronic fuel injector 5.

[0023] When the thrust of the push rod in control structure 2 overcomes the preload of spring 202, the needle valve is pushed open, the nozzle orifice channel of the fuel injector assembly is opened, and finally the fuel injector assembly sprays into the combustion chamber in an atomized state. When the fuel injection signal ends, the driving force acting on the hydraulic plunger decreases. At this time, the spring 202, which is in a pre-compressed state, releases its elastic force and pushes the guide sleeve and push rod upward. The push rod then drives the hydraulic plunger to reset. At this time, when the spring 202 is compressed and rebounds, the collar 201 and the vertical cylinder 203 increase the space inside the spring 202, which can prevent the inner wall of the spring 202 from wearing with the inner wall rod of the electronic fuel injector 5, prevent the spring deformation flexibility inside the injector from decreasing, and ensure stable elastic force transmission.

[0024] The top of the electronic fuel injector 5 is electrically connected to a wire 6. The support structure 3 includes a bent rod 301 and a cylinder 302. The bottom of the bent rod 301 is fixedly connected to the top of the electronic fuel injector 5, and the inner end of the bent rod 301 is fixedly connected to the outer wall of the cylinder 302. The bent rod 301, together with the cylinder 302, can raise the bending position of the wire 6. The top of the cylinder 302 is connected to a curved groove 303, which can make the bending of the wire 6 more flexible than the direct bending of the wire 6. The inner wall of the cylinder 302 is fixedly connected to the outer wall of the wire 6.

[0025] Working principle:

[0026] Screw the cap 4 down through the thread on the outer wall of the oil inlet pipe 1 to open the oil inlet pipe 1. Then connect the end of the oil pipe to the thread on the outer wall of the oil inlet pipe 1 to complete the oil pipe connection. At this time, the high-pressure fuel in the oil pipe enters the electronic fuel injector 5 through the oil inlet pipe 1.

[0027] High-pressure diesel electronic fuel injector usage:

[0028] When the fuel pressure reaches the set threshold, the high-pressure fuel exerts an upward thrust on the hydraulic plunger in the electronic fuel injection injector 5. The hydraulic plunger transmits this pressure to the push rod below it, giving the push rod a downward driving force. As the push rod moves downward under the driving force, its lower end transmits the force to the needle valve in the nozzle assembly through the adjusting shim. When the thrust of the push rod overcomes the preload of the spring 202, the needle valve is pushed open, the nozzle assembly's injection orifice channel opens, and finally, the fuel is sprayed into the combustion chamber in an atomized state from the nozzle assembly's injection orifice. When the fuel injection signal ends, the driving force acting on the hydraulic plunger decreases. At this time, the spring 202, which is in a pre-compressed state, releases its elasticity, pushing the guide sleeve and push rod upward. The push rod then drives the hydraulic plunger to reset. At this time, when the spring 202 is compressed and rebounding, the collar 201 and the vertical cylinder 203 increase the space inside the spring 202, which can prevent the inner wall of the spring 202 from wearing with the inner wall rod of the electronic fuel injection injector 5.

[0029] High-pressure diesel electronic fuel injector support protection:

[0030] The bent rod 301, together with the cylinder 302, increases the bending position of the top wire 6 of the electronic injection nozzle 5. At the same time, the curved groove 303 connected to the top of the cylinder 302 makes the wire 6 flexible through its own curved surface, which reduces the mechanical damage to the outer wall of the wire 6 and prevents the electronic injection nozzle 5 from breaking with the wire 6.

[0031] Although the present invention has been illustrated and described with reference to preferred embodiments, those skilled in the art should understand that various changes in form and detail are possible within the scope of the claims.

Claims

1. A high-pressure diesel electronic fuel injector, comprising an inlet pipe (1) and a cap (4), characterized in that: The outer wall of the oil inlet pipe (1) is threadedly connected to the inner wall of the cap (4). An electronic fuel injector (5) is connected to the left side of the oil inlet pipe (1). A control structure (2) is connected to the inner wall of the electronic fuel injector (5). A support structure (3) is connected to the top of the electronic fuel injector (5).

2. The high-pressure diesel electronic fuel injector according to claim 1, characterized in that: The control structure (2) includes a collar (201) and a spring (202). The inner wall of the collar (201) is fixedly connected to the inner wall piston of the electronic fuel injector (5). The outer wall of the collar (201) is fixedly connected to the bottom of the spring (202). A vertical cylinder (203) is attached to the upper part of the inner wall of the spring (202).

3. The high-pressure diesel electronic fuel injector according to claim 2, characterized in that: A circular plate (7) is fixed to the top of the vertical tube (203).

4. The high-pressure diesel electronic fuel injector according to claim 3, characterized in that: The bottom of the circular plate (7) is fixedly connected to the top of the spring (202), and the outer wall of the circular plate (7) is fixedly connected to the inner wall of the electronic fuel injector (5).

5. The high-pressure diesel electronic fuel injector according to claim 1, characterized in that: The top of the electronic fuel injector (5) is electrically connected to a wire (6).

6. The high-pressure diesel electronic fuel injector according to claim 1, characterized in that: The support structure (3) includes a bent rod (301) and a cylinder (302). The bottom of the bent rod (301) is fixedly connected to the top of the electronic fuel injector (5). The inner end of the bent rod (301) is fixedly connected to the outer wall of the cylinder (302). The top of the cylinder (302) is connected to a curved groove (303).

7. The high-pressure diesel electronic fuel injector according to claim 6, characterized in that: The inner wall of the cylinder (302) is fixedly connected to the outer wall of the wire (6).

Images