High-precision automobile oil nozzle

Abstract

The utility model discloses a high-precision automobile oil nozzle, which relates to the field of automobile oil nozzles, and comprises a mounting rack, the top of the mounting rack is fixedly connected with a valve body, the bottom of the valve body is fixedly connected with an oil delivery pipe, the bottom of the mounting rack is fixedly connected with a guide rod, and the bottom of the mounting rack is provided with a return spring. A damper is mounted at the bottom of the mounting frame, a movable plate is mounted at one end of the damper, an oil spraying pipe is fixedly connected to the inner wall of the movable plate, fuel oil is sprayed through the oil spraying pipe, impact force borne by the oil spraying pipe can be conducted to the movable plate, the movable plate slides along a guide rod, and under the action of a reset spring, the oil spraying pipe can be driven to rotate. And a damper is mounted at the bottom of the mounting frame, and the movable plate is mounted at one end of the damper, so that reciprocating vibration of the movable plate can be prevented, and the effect of elastically supporting the oil spraying pipe conveniently is achieved.

Description

Technical Field

[0001] This utility model relates to the field of automotive fuel injectors, specifically a high-precision automotive fuel injector. Background Technology

[0002] Fuel injectors are high-precision components installed on car engines. They operate on the principle of solenoid valves. When the solenoid coil is energized, it generates suction, lifting the needle valve and opening the injection orifice. Fuel is then sprayed at high speed through the annular gap between the needle valve head and the injection orifice, forming a mist that promotes complete combustion. This high precision allows for precise control of fuel injection. However, the amount of fuel injected by a car fuel injector varies at different times. When the fuel volume changes significantly, the fuel injector is prone to large impacts. Current car fuel injectors do not provide elastic support for the injection pipe, thus necessitating a high-precision fuel injector.

[0003] Existing patent document CN217976434U discloses an automotive fuel injector, including a nozzle, a nozzle head mounted on the front surface of the nozzle, a valve body fixedly sleeved on the rear side of the nozzle surface, an inlet head mounted on the top of the valve body, a sealing plug mounted on the back surface of the nozzle, a rear mounting bracket sleeved on the rear side of the nozzle surface, and a front mounting bracket sleeved on the surface of the nozzle and in front of the valve body. This utility model allows for flexible installation of automotive fuel injectors, thus extending their service life. It solves the problem of existing fuel injectors lacking elastic support due to the inability to be flexibly installed. Furthermore, because the fuel injection volume varies at different times, significant changes in fuel volume can cause substantial impacts on the fuel injectors, and the lack of elastic support easily damages them, resulting in a short service life. However, the technology in CN217976434U only uses a spring for elastic support, causing the fuel injector to vibrate back and forth under impact and spring elasticity, further reducing its lifespan. Therefore, a high-precision automotive fuel injector is urgently needed. Utility Model Content

[0004] Therefore, the purpose of this utility model is to provide a high-precision automotive fuel injector to solve the problem that existing high-precision automotive fuel injectors are inconvenient to provide elastic support for the fuel injection pipe.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a high-precision automotive fuel injector, comprising a mounting bracket, a valve body fixedly connected to the top of the mounting bracket, an oil supply pipe fixedly connected to the bottom of the valve body, a guide rod fixedly connected to the bottom of the mounting bracket, a return spring installed at the bottom of the mounting bracket, a damper installed at the bottom of the mounting bracket, a movable plate installed at one end of the damper, and a fuel injection pipe fixedly connected to the inner wall of the movable plate.

[0006] The inside of the fuel injection pipe is provided with a sealing groove, and a sealing ring is installed inside the fuel injection pipe.

[0007] Preferably, the reset spring is sleeved on the outer wall of the guide rod, and the guide rod is symmetrically arranged with respect to the central axis of the mounting frame.

[0008] Preferably, the movable plate and the guide rod form a sliding structure, and the movable plate has an open design.

[0009] Preferably, the mounting bracket is arranged parallel to the movable plate, and the return spring is clamped between the mounting bracket and the movable plate.

[0010] Preferably, the fuel injection pipe and the fuel delivery pipe form a sliding structure, and the fuel injection pipe has a slotted design.

[0011] Preferably, the fuel injection pipe is engaged with the sealing ring via a sealing groove, and the inner wall of the sealing ring is in contact with the outer wall of the fuel delivery pipe.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. This utility model, through the installation of a mounting bracket, guide rod, return spring, damper, movable plate, and fuel injection pipe, allows the impact force on the fuel injection pipe to be transmitted to the movable plate when fuel is injected through the fuel injection pipe. This causes the movable plate to slide along the guide rod. Under the action of the return spring, the movable plate can be reset, thereby resetting the fuel injection pipe. The damper installed at the bottom of the mounting bracket, with the movable plate installed at one end of the damper, can prevent the movable plate from vibrating back and forth, thus providing elastic support for the fuel injection pipe and preventing damage to the car's fuel injector due to the impact force generated when the fuel quantity changes.

[0014] 2. This utility model, through the setting of an oil supply pipe, an oil injection pipe and a sealing ring, connects the oil injection pipe with the sealing ring by engaging. When the oil injection pipe is impacted and slides along the oil supply pipe, the inner wall of the sealing ring can always be in contact with the outer wall of the oil supply pipe, thereby improving the sealing performance of the connection between the oil supply pipe and the oil injection pipe. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0016] Figure 2 This is a perspective view of the mounting bracket of this utility model;

[0017] Figure 3 This is a perspective view of the damper of this utility model;

[0018] Figure 4 This is a three-dimensional sectional view of the fuel injection pipe of this utility model.

[0019] In the diagram: 1. Mounting bracket; 2. Valve body; 3. Oil supply pipe; 4. Guide rod; 5. Return spring; 6. Damper; 7. Movable plate; 8. Injection pipe; 9. Sealing groove; 10. Sealing ring. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0021] The embodiments of this utility model will be described below based on its overall structure.

[0022] Please see Figure 1-4 A high-precision automotive fuel injector includes a mounting bracket 1. A valve body 2 is fixedly connected to the top of the mounting bracket 1, and an oil supply pipe 3 is fixedly connected to the bottom of the valve body 2. A guide rod 4 is fixedly connected to the bottom of the mounting bracket 1, and a return spring 5 is installed at the bottom of the mounting bracket 1. A damper 6 is installed at the bottom of the mounting bracket 1, and a movable plate 7 is installed at one end of the damper 6. An injection pipe 8 is fixedly connected to the inner wall of the movable plate 7. The return spring 5 is sleeved on the outer wall of the guide rod 4, and the guide rod 4 is symmetrically arranged about the central axis of the mounting bracket 1. The movable plate 7 and the guide rod 4 form a sliding structure, and the movable plate 7 has an open design. The mounting bracket 1 and the movable plate 7 are arranged parallel to each other, and the return spring 5 is clamped between the mounting bracket 1 and the movable plate 7, which can facilitate elastic support for the injection pipe 8 and prevent the automotive fuel injector from being damaged by the impact force generated when the fuel volume changes.

[0023] Please see Figure 1-4 A high-precision automotive fuel injector has a sealing groove 9 inside the fuel injector pipe 8 and a sealing ring 10 installed inside the fuel injector pipe 8. The fuel injector pipe 8 and the fuel supply pipe 3 form a sliding structure, and the fuel injector pipe 8 has a slotted design. The fuel injector pipe 8 is connected to the sealing ring 10 through the sealing groove 9, and the inner wall of the sealing ring 10 is in contact with the outer wall of the fuel supply pipe 3, which can improve the sealing performance between the fuel supply pipe 3 and the fuel injector pipe 8.

[0024] Working principle: During use, by activating valve body 2, when the solenoid coil is energized, a suction force is generated, the needle valve is lifted, and the injection orifice is opened. Fuel is injected at high speed through the annular gap between the needle valve head and the injection orifice. When the fuel volume changes significantly, a large impact force is generated. The fuel is injected through the injection pipe 8, and the impact force on the injection pipe 8 is transmitted to the movable plate 7, causing the movable plate 7 to slide along the guide rod 4. This causes the return spring 5 to be compressed and deformed. Under the action of the return spring 5, the movable plate 7 can be reset, and the injection pipe 8 can be reset. A damper 6 is installed at the bottom of the mounting bracket 1, and a movable plate 7 is installed at one end of the damper 6 to prevent the movable plate 7 from reciprocating. It is connected to the fuel injection pipe 8 by a sealing ring 10. When the fuel injection pipe 8 is impacted and slides along the fuel supply pipe 3, the inner wall of the sealing ring 10 can always be in contact with the outer wall of the fuel supply pipe 3, which can improve the sealing performance of the connection between the fuel supply pipe 3 and the fuel injection pipe 8. This completes the use of the device. The contents not described in detail in this specification are known prior art to those skilled in the art.

[0025] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A high-precision automotive fuel injector, comprising a mounting bracket (1), characterized in that: The top of the mounting bracket (1) is fixedly connected to a valve body (2), the bottom of the valve body (2) is fixedly connected to an oil supply pipe (3), the bottom of the mounting bracket (1) is fixedly connected to a guide rod (4), the bottom of the mounting bracket (1) is installed with a return spring (5), the bottom of the mounting bracket (1) is installed with a damper (6), one end of the damper (6) is installed with a movable plate (7), and the inner wall of the movable plate (7) is fixedly connected to an oil injection pipe (8). The inside of the fuel injection pipe (8) is provided with a sealing groove (9), and a sealing ring (10) is installed inside the fuel injection pipe (8).

2. The high-precision automotive fuel injector according to claim 1, characterized in that: The reset spring (5) is sleeved on the outer wall of the guide rod (4), and the guide rod (4) is symmetrically arranged with respect to the central axis of the mounting bracket (1).

3. The high-precision automotive fuel injector according to claim 1, characterized in that: The movable plate (7) and the guide rod (4) form a sliding structure, and the movable plate (7) is designed with an opening.

4. The high-precision automotive fuel injector according to claim 1, characterized in that: The mounting bracket (1) is arranged parallel to the movable plate (7), and the reset spring (5) is clamped between the mounting bracket (1) and the movable plate (7).

5. A high-precision automotive fuel injector according to claim 1, characterized in that: The fuel injection pipe (8) and the fuel delivery pipe (3) form a sliding structure, and the fuel injection pipe (8) is a slotted design.

6. A high-precision automotive fuel injector according to claim 1, characterized in that: The oil injection pipe (8) is engaged with the sealing ring (10) through the sealing groove (9), and the inner wall of the sealing ring (10) is in contact with the outer wall of the oil delivery pipe (3).

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