A new type of fuel injector

Abstract

The utility model relates to a novel oil sprayer belongs to the technical field of automobile parts, and the oil sprayer is improved for the problem that the power needs to be frequently switched in the washing in the prior art. The oil sprayer includes the body, oil pipe channel, valve rod and solenoid. The connecting strip is arranged through the through hole of annular groove side wall, one end of the connecting strip is fixed with the slip ring, and the other end extends to the sealing plate in the recess of oil pipe channel. The side wall of sealing plate is fixed with the push block, and the outer wall of valve rod is fixed with the side block. The rotation of threaded ring drives the axial movement of slip ring, the push block is driven to push the side block through the connecting strip, the valve rod is forced to move up and separate from the oil nozzle, and the flushing channel is formed. The in-situ spring maintains the normally closed state of valve rod. The sealing gasket is arranged at the joint of sealing plate and recess. The oil sprayer does not need to be connected to the power supply when washing, and the flushing channel can be directly opened by manual operation, which simplifies the process and improves the efficiency. It is mainly used for cleaning and maintenance of diesel engine oil sprayer.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts technology, and in particular to a novel fuel injector. Background Technology

[0002] Existing diesel engine injectors generally use solenoid valves to control fuel injection, and the valve stem opens by the magnetic attraction generated by energizing the solenoid coil;

[0003] In actual maintenance, after removing the injector, the staff needs to manually connect an additional power source to power it, so as to move the valve stem again to form a flushing channel. However, in order to avoid burning out the solenoid coil, the staff needs to frequently turn the power supply on and off to the solenoid coil, which makes the cleaning operation cumbersome and inconvenient. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies, such as cumbersome and inconvenient cleaning operations, by proposing a novel fuel injector.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A novel fuel injector includes an injector body and an internal oil pipe channel, wherein the top of the injector body is provided with an oil inlet connector and the bottom is provided with a fuel nozzle.

[0007] The valve stem is assembled inside the oil pipe channel, and its bottom end forms a sealing fit with the fuel injector.

[0008] An electromagnetic coil is embedded in the inner wall of the oil pipe channel and is positioned corresponding to the armature at the top of the valve stem;

[0009] The injector body has an annular groove on its outer wall, a threaded ring is threadedly fitted on the outer wall of the annular groove, a slip ring is slidably fitted on the outer wall of the annular groove, and an annular groove is formed on the inner wall of the threaded ring, with the slip ring embedded in the annular groove.

[0010] A through hole is provided on the side wall of the annular groove, and a connecting strip is inserted through the through hole. One end of the connecting strip is fixedly connected to the inner wall of the slip ring, and the other end extends into the oil pipe channel. A groove is provided on the inner wall of the oil pipe channel, and a sealing plate is fixedly provided on one end of the connecting strip, and the sealing plate is located in the groove.

[0011] The sealing plate has a fixed push block on its side wall, and the valve stem has a side block fixed on its outer wall, with the push block located below the side block;

[0012] The rotating threaded ring drives the slip ring to move axially, and through the connecting strip, it drives the push block to push the side block, forcing the valve stem to disengage from the fuel injector to form a flushing channel, thus achieving manual cleaning without electricity.

[0013] In one possible design, an in-situ spring is provided between the top of the valve stem and the inner wall of the oil pipe passage, and the in-situ spring pre-compresses the valve stem to maintain it in a normally closed state.

[0014] In one possible design, an electrical connector is provided on the outer wall of the injector body, and the electrical connector is electrically connected to an electromagnetic coil.

[0015] In one possible design, the sidewall of the sealing plate that fits into the groove is provided with a sealing gasket.

[0016] In one possible design, the contact surface between the push block and the side block is a vertical plane.

[0017] In one possible design, the pusher block drives the valve stem to move axially when it pushes against the side block.

[0018] In one possible design, the sealing plate slides axially along the groove.

[0019] In one possible design, the sealing gasket is a rubber sealing gasket.

[0020] In this application, during actual use, by rotating the threaded ring upwards, the threaded ring will drive the slip ring to move vertically upwards. The slip ring drives the push block to move through the connecting strip. The push block pushes the side block on the outer wall of the sealing plate, thereby moving upwards together, so that the fuel injector opens. At this time, the inside can be flushed without frequent power-on and power-off operations.

[0021] In this utility model, the novel fuel injector can achieve manual control of the opening and closing of the fuel injector through the mechanical transmission of the threaded ring and the slip ring, so that it does not need to be connected to the electromagnetic coil power supply during cleaning operations, avoiding the need to repeatedly connect electrical components, thereby improving the efficiency of cleaning operations.

[0022] In this utility model, the novel fuel injector, through the sealing gasket and sealing plate, can achieve the original sealing performance of the fuel injector, prevent fuel leakage, and ensure the effect of daily use.

[0023] In this invention, the opening and closing state of the nozzle is manually controlled during use, allowing for direct rinsing without frequent manual control of the external power supply, thereby improving cleaning efficiency. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the main structure of a novel fuel injector proposed in this utility model;

[0025] Figure 2 This is a cross-sectional structural diagram of a novel fuel injector proposed in this utility model;

[0026] Figure 3This utility model Figure 2 Enlarged view of the structure of part A in the middle.

[0027] In the diagram: 1. Injector body; 2. Electrical connector; 3. Oil inlet connector; 4. Oil pipe channel; 5. In-situ spring; 6. Electromagnetic coil; 7. Valve stem; 8. Injector nozzle; 9. Annular groove; 10. Threaded ring; 11. Annular groove; 12. Slip ring; 13. Through hole; 14. Connecting strip; 15. Push block; 16. Side block; 17. Sealing plate; 18. Groove. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0029] In one embodiment: Reference Figure 1-2 An injector includes: an injector body 1, an oil pipe channel 4 axially opened inside the body 1, an oil inlet connector 3 threadedly connected to the top of the body 1, and an injector nozzle 8 fixed at the bottom.

[0030] A valve stem 7 is movably mounted inside the oil pipe channel 4. The bottom end of the valve stem 7 forms a sealing fit with the valve seat of the fuel injector 8, and a home-position spring 5 is sleeved between the top end and the inner wall of the oil pipe channel 4 to maintain the initial closed state of the valve stem 7. An electromagnetic coil 6 is embedded in the inner wall of the middle part of the oil pipe channel 4. The electromagnetic coil 6 is electrically connected to the external control system through an electrical connector 2 set on the outer wall of the device body 1. An armature structure is fixed at the top end of the valve stem 7 corresponding to the position of the electromagnetic coil 6.

[0031] refer to Figure 3 An annular groove 9 is formed on the outer wall of the device body 1 below the electromagnetic coil 6. A threaded ring 10 is threaded onto the outer wall of the annular groove 9. An annular groove 11 is formed on the inner wall of the threaded ring 10, and an axially sliding slip ring 12 is embedded in the groove 11. A through hole 13 is formed on the side wall of the annular groove 9. A rigid connecting strip 14 passes through the through hole 13. The outer end of the connecting strip 14 is welded to the inner wall of the slip ring 12, and the inner end extends into a groove 18 formed on the inner wall of the oil pipe channel 4 and is welded to a sealing plate 17. A push block 15 is fixed to the side wall of the sealing plate 17, and a side block 16 is welded above the push block 15 to the outer wall of the valve stem 7.

[0032] When cleaning the inside of the fuel injector is required in actual work, after the operator removes the fuel injector, they twist the threaded ring 10 to make it rise axially along the annular groove 9. The threaded ring 10 drives the slip ring 12 to move upward synchronously through the groove 11. The slip ring 12 pulls the sealing plate 17 to slide along the groove 18 via the connecting strip 14. The push block 15 rises accordingly and pushes the side block 16, forcing the valve stem 7 to overcome the elastic force of the original spring 5 and move upward, so that the bottom end of the valve stem 7 separates from the valve seat of the fuel injector 8 to form a flushing channel. At this time, the cleaning fluid can enter from the oil inlet connector 3 and directly flush the inside of the fuel injector 8 through the oil pipe channel 4, without the need to repeatedly turn the solenoid coil 6 on and off.

[0033] After cleaning, the threaded ring 10 is rotated in the opposite direction to reset the slip ring 12. The original spring 5 pushes the valve stem 7 to re-close the injector 8, and the sealing plate 17 returns to its initial position under the traction of the connecting strip 14.

[0034] This application can be used in the field of automotive parts, or in other fields applicable to this application.

[0035] In another embodiment: Reference Figure 3 A new type of fuel injector is applied to the field of automotive parts. A rubber sealing gasket is provided between the outer edge of the sealing plate 17 and the side wall of the groove 18 to ensure the sealing performance of the oil pipe channel 4.

[0036] The accompanying drawings in this application are for illustrative purposes only. The dimensions and shapes of the components shown are not actual limitations but are merely schematic representations. In actual implementation, the components can be reasonably configured and adjusted according to specific needs and actual conditions.

[0037] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A novel fuel injector, characterized in that, include: The injector body (1) and its internal oil pipe channel (4) are provided with an oil inlet connector (3) at the top and an oil nozzle (8) at the bottom. The valve stem (7) is assembled in the oil pipe channel (4), and its bottom end forms a sealing fit with the fuel injector (8); An electromagnetic coil (6) is embedded in the inner wall of the oil pipe channel (4) and is set in correspondence with the armature at the top of the valve stem (7); The injector body (1) has an annular groove (9) on its outer wall. A threaded ring (10) is threadedly fitted on the outer wall of the annular groove (9). A sliding ring (12) is slidably fitted on the outer wall of the annular groove (9). An annular groove (11) is opened on the inner wall of the threaded ring (10). The sliding ring (12) is fitted into the annular groove (11). The annular groove (9) has a through hole (13) on its side wall. A connecting strip (14) is inserted through the through hole (13). One end of the connecting strip (14) is fixedly connected to the inner wall of the slip ring (12), and the other end extends into the oil pipe channel (4). The inner wall of the oil pipe channel (4) has a groove (18). A sealing plate (17) is fixedly installed at one end of the connecting strip (14), and the sealing plate (17) is located in the groove (18). The sealing plate (17) has a fixed push block (15) on its side wall, and the valve stem (7) has a side block (16) fixed on its outer wall. The push block (15) is located below the side block (16). The rotating threaded ring (10) drives the slip ring (12) to move axially, and through the connecting bar (14) drives the push block (15) to push the side block (16), forcing the valve stem (7) to disengage from the nozzle (8) to form a flushing channel, thus achieving manual cleaning without electricity.

2. The novel fuel injector according to claim 1, characterized in that, An in-situ spring (5) is provided between the top of the valve stem (7) and the inner wall of the oil pipe channel (4), and the in-situ spring (5) pre-presses the valve stem (7) to maintain the normally closed state.

3. The novel fuel injector according to claim 1, characterized in that, An electrical connector (2) is provided on the outer wall of the injector body (1), and the electrical connector (2) is electrically connected to the electromagnetic coil (6).

4. The novel fuel injector according to claim 1, characterized in that, A sealing gasket is provided on the side wall where the sealing plate (17) fits into the groove (18).

5. The novel fuel injector according to claim 1, characterized in that, The contact surface between the push block (15) and the side block (16) is a vertical plane.

6. The novel fuel injector according to claim 5, characterized in that, When the pusher block (15) pushes the side block (16), it drives the valve stem (7) to move axially.

7. The novel fuel injector according to claim 1, characterized in that, The sealing plate (17) slides axially along the groove (18).

8. The novel fuel injector according to claim 4, characterized in that, The sealing gasket is a rubber sealing gasket.

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