Automobile fuel injector testing equipment

Abstract

The present invention relates to the technical field of automobile fuel injectors, and in particular to an automobile fuel injector detection device, comprising a valve body, wherein a reduced diameter section is integrally installed at the bottom end of the valve body; the beneficial effects of the present invention are as follows: a cleaning slip ring is slidably arranged on the outer surface of the reduced diameter section, and the cleaning slip ring is connected to an armature through a linkage slide plate and a connecting mechanism, when too much carbon deposits adhere to the outer surface of the reduced diameter section, causing the fuel injection hole to be blocked, the fuel cannot be sprayed out from the fuel injection hole, and under the action of pressure, the fuel will enter the oil return hole and then drive the connecting mechanism to trigger a contactor to remind the driver in the car, and at the same time, the linkage slide plate is connected to the armature, and when the armature slides up and down normally, the cleaning slip ring will be driven to slide up and down through the linkage slide plate to scrape off the carbon deposits on the outer surface of the reduced diameter section. This arrangement can not only remind the driver, but also temporarily dredge the fuel injection hole, so that the driver can clean the fuel injector in time after driving.

Description

Technical Field

[0001] The invention relates to the technical field of automobile fuel injection nozzles, and in particular to an automobile fuel injection nozzle detection device. Background Art

[0002] With the development of the automobile industry and the increasing environmental protection requirements, the performance optimization of the fuel system has become one of the focuses of automobile manufacturers. The key component in the fuel system, the fuel injector, is directly related to whether the engine combustion efficiency and emission standards are met. An efficient fuel injector can ensure that the fuel enters the cylinder for combustion after being atomized in the best state, thereby achieving the purpose of saving fuel and reducing pollutant emissions. However, in actual use, due to factors such as poor fuel quality and long-term operation, the fuel injector is prone to varying degrees of carbon deposition or clogging, which not only reduces fuel economy, but may also cause engine power to drop or even damage.

[0003] Traditionally, the main methods for dealing with injector clogging include regular cleaning or replacing new injectors. Although the former can restore the working performance of the injectors to a certain extent, the operation process is more complicated and requires professional tools; the latter means higher maintenance costs. In addition, neither of these two methods can achieve instant response, that is, take immediate measures when the injector starts to become slightly clogged to prevent the situation from worsening. Therefore, it is particularly important to develop a new technology that can quickly and accurately identify and solve the problem of injector clogging.

[0004] Therefore, a kind of automobile fuel injection nozzle detection equipment is needed to solve the above problems. Summary of the invention

[0005] In order to solve the above problem, that is, to solve the problem that the existing fuel injector cannot detect the blockage of the fuel injection hole in time, the present invention provides a vehicle fuel injector detection device.

[0006] A vehicle fuel injector detection device comprises a valve body, a reduced diameter section is integrally installed at the bottom end of the valve body, an oil supply chamber is provided in the interior of the valve body near the bottom end, a needle valve is slidably installed in the interior of the oil supply chamber, an oil injection hole is provided in the reduced diameter section near the bottom end, the inner end of the oil injection hole is connected with the bottom end of the oil supply chamber through an oil through hole, an armature is slidably installed in the interior of the valve body near the top end, the needle valve is drivingly connected to the armature, a cleaning slip ring coaxial with the reduced diameter section is slidably installed at the bottom end of the valve body, the inner diameter of the cleaning slip ring is equal to the outer diameter of the reduced diameter section, a linkage slide plate is slidably installed in the interior of the valve body, the bottom end of the linkage slide plate is fixedly connected to the cleaning slip ring, the top end of the linkage slide plate and the side of the armature are provided with a matching connection mechanism, and the side of the oil through hole is connected with an An oil return hole is drive-connected with the connecting mechanism, a contactor is arranged on the connecting mechanism on the armature, and the contactor is connected with the alarm in the vehicle; a cleaning slip ring is arranged by sliding on the outer surface of the reduced diameter section, and the cleaning slip ring is connected to the armature through a linkage slide plate and a connecting mechanism. When too much carbon deposits adhere to the outer surface of the reduced diameter section and cause the fuel injection hole to be blocked, the fuel cannot be sprayed out from the fuel injection hole. Under the action of pressure, the fuel will enter the oil return hole and then drive the connecting mechanism to trigger the contactor to remind the driver in the vehicle. At the same time, the linkage slide plate is connected to the armature. When the armature slides up and down normally, the cleaning slip ring will be driven to slide up and down through the linkage slide plate to scrape off the carbon deposits on the outer surface of the reduced diameter section. This setting can not only remind the driver, but also temporarily dredge the fuel injection hole, so that the driver can clean the fuel injector in time after driving.

[0007] Preferably, a mounting head is fixedly mounted on the top of the valve body, an oil inlet pipe is fixedly mounted on the side of the valve body, the oil inlet pipe is connected to the top of the oil supply cavity, and a filter is fixedly mounted inside the oil inlet pipe.

[0008] Preferably, a driving chamber is opened near the top of the interior of the valve body, an electromagnetic coil is fixedly installed on the top of the driving chamber, the electromagnetic coil is annular, an electric connector is fixedly installed on the top of the side of the valve body, the electric connector is electrically connected to the electromagnetic coil, a mounting plate is fixedly installed on the side of the driving chamber, the armature is slidably installed on the mounting plate, the top of the armature is connected to the top of the driving chamber by a first resisting spring, an oil outlet pipe is fixedly installed on the side of the valve body, and the oil outlet pipe is communicated with the bottom end of the driving chamber.

[0009] Preferably, a vertical cavity is opened in communication with the bottom of the driving cavity, the needle valve slides in the vertical cavity near the top, a first spring cavity is opened on the side of the vertical cavity, a first spring seat is fixedly installed on the side of the needle valve, a second abutting spring is arranged between the upper surface of the first spring seat and the top of the first spring cavity, and when the lower surface of the first spring seat abuts against the bottom end of the first spring cavity, the bottom end of the needle valve abuts against the top end of the oil through hole.

[0010] Preferably, a second spring cavity coaxial with the reduced diameter section is opened near the bottom end of the interior of the valve body, the top end of the cleaning slip ring slides in the second spring cavity, a second spring seat is coaxially fixedly installed on the top end of the outer surface of the cleaning slip ring, a third abutting spring is arranged between the lower surface of the second spring seat and the bottom end of the second spring cavity, and when the upper surface of the second spring seat abuts against the top end of the second spring cavity, the bottom end of the cleaning slip ring is located above the oil injection hole.

[0011] Preferably, the top end of the second spring cavity is connected to a linkage sliding cavity, the top end of the linkage sliding cavity is connected to the bottom of the driving cavity, the linkage slide slides in the linkage sliding cavity, the bottom end of the linkage slide is fixedly connected to the upper surface of the second spring seat, the top end of the linkage slide extends into the driving cavity, and the two sides of the linkage slide respectively abut against the two sides of the linkage sliding cavity.

[0012] Preferably, the connecting mechanism includes a transverse plate and an inner socket, the transverse plate is integrally mounted on the top of the linkage slide, the inner socket is opened on the side of the armature close to the linkage slide, the contactor is installed at the inner end of the inner socket, a slide cavity is opened on the side of the transverse plate close to the armature, a connecting slide is slidably installed inside the slide cavity through a tensioning spring, an oil filling hole is opened inside the linkage slide, and the top of the oil filling hole is communicated with the slide cavity.

[0013] Preferably, a transfer chamber is provided on the side of the linkage sliding chamber, the oil return hole is connected to the transfer chamber, the bottom end of the oil filling hole is connected to the transfer chamber, the top end of the oil return hole is connected to the driving chamber, and an overflow valve is provided near the top end of the oil return hole. When the second spring seat is located at the top end of the second spring chamber, the bottom end of the oil filling hole is connected to the position of the transfer chamber near the top end. When the second spring seat is located at the bottom end of the second spring chamber, the bottom end of the oil filling hole is connected to the position of the transfer chamber near the bottom end.

[0014] Working principle: During normal operation, the fuel injector is installed on the mounting bracket of the car through the mounting head, the external power supply is connected to the electrical connector, the electromagnetic coil is energized, the external high-pressure fuel supply pipe is connected to the fuel inlet pipe, and the fuel outlet pipe is connected to the fuel tank. When the electromagnetic coil is energized, the armature is attracted to overcome the elastic force of the first resisting spring and slide up, and the needle valve also slides up under the attraction of the armature, the top of the oil hole is opened, and the fuel in the fuel supply chamber is sprayed out through the atomization of the fuel injection hole. When the electromagnetic coil is de-energized, the armature slides down and resets under the resisting force of the first resisting spring, and the needle valve also slides down and resets under the resisting force of the second resisting spring, and the top of the oil hole is re-blocked. When too much carbon deposits adhere to the outer surface of the reduced diameter section, causing the fuel injection hole to be blocked and the fuel cannot be sprayed out, after the armature and the needle valve rise, the fuel in the fuel supply chamber cannot be sprayed out from the fuel injection hole. It will enter the oil return hole, then enter the transfer chamber, and then enter the oil filling hole from the transfer chamber, and finally enter the slide plate chamber to press out the connecting slide plate, so that the connecting slide plate is inserted into the inner socket, triggering the contactor to remind the driver in the car, and then when the electromagnetic coil is powered off, the armature drives the cleaning slip ring to slide down through the linkage slide plate to scrape off the carbon deposits on the outer surface of the reduced diameter section, and then the armature reciprocates up and down to drive the cleaning slip ring to slide up and down, and clean the outer surface of the reduced diameter section many times until the injection hole is unblocked, and the fuel in the oil filling hole flows out through the injection hole, and the connecting slide plate is separated from the inner socket. When the pressure in the oil supply chamber is too high and the injection hole is in a blocked state, the fuel in the oil return hole that cannot enter the oil filling hole will enter the drive chamber, and then flow from the oil outlet pipe to the external oil tank, which can ensure the pressure balance inside the injector.

[0015] The beneficial effects of the present invention are:

[0016] The present invention arranges a cleaning slip ring by sliding on the outer surface of the reduced diameter section, and connects the cleaning slip ring to the armature through a linkage slide plate and a connecting mechanism. When too much carbon deposits adhere to the outer surface of the reduced diameter section and cause the fuel injection hole to be blocked, the fuel cannot be sprayed out from the fuel injection hole. Under the action of pressure, the fuel will enter the oil return hole and then drive the connecting mechanism to trigger the contactor to remind the driver in the car. At the same time, the linkage slide plate is connected to the armature. When the armature slides up and down normally, the cleaning slip ring will be driven to slide up and down through the linkage slide plate to scrape off the carbon deposits on the outer surface of the reduced diameter section. This arrangement can not only remind the driver, but also temporarily dredge the fuel injection hole, so that the driver can clean the fuel injector in time after driving. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the external structure of the present invention;

[0018] Figure 2 It is a schematic diagram of the cross-sectional structure of the present invention;

[0019] Figure 3 For the present invention Figure 2 The enlarged structural diagram at A in the middle;

[0020] Figure 4 It is a schematic diagram of the armature structure of the present invention;

[0021] Figure 5 This is a schematic diagram of the structure of the mounting plate of the present invention;

[0022] Figure 6 This is a schematic diagram of the cleaning structure of the slip ring of the present invention;

[0023] Figure 7 This is a schematic diagram of the linkage slide structure of the present invention;

[0024] Figure 8 It is a schematic diagram of the needle valve structure of the present invention.

[0025] In the figure:

[0026] 1. Valve body; 2. Reduced diameter section; 3. Oil supply chamber; 4. Needle valve; 5. Oil injection hole; 6. Oil through hole; 7. Armature; 8. Cleaning slip ring; 9. Linkage slide plate; 10. Oil return hole; 11. Contactor; 12. Mounting head; 13. Oil inlet pipe; 14. Filter; 15. Drive chamber; 16. Solenoid coil; 17. Electrical connector; 18. Mounting plate; 19. First push-up spring; 20. Oil outlet pipe; 21. Vertical chamber; 22. First spring chamber; 23. First spring seat; 24. Second push-up spring; 25. Second spring chamber; 26. Second spring seat; 27. Third push-up spring; 28. Linkage slide chamber; 29. ​​Cross plate; 30. Inner plug hole; 31. Slide chamber; 32. Tension spring; 33. Connecting slide; 34. Oil filling hole; 35. Transfer chamber; 36. Overflow valve. DETAILED DESCRIPTION

[0027] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0028] like Figure 1-3As shown, the embodiment of the present invention discloses an automobile fuel injection nozzle detection device, including a valve body 1, a reduced diameter section 2 is integrally installed at the bottom end of the valve body 1, an oil supply chamber 3 is opened near the bottom end of the valve body 1, a needle valve 4 is slidably installed inside the oil supply chamber 3, an oil injection hole 5 is opened near the bottom end of the reduced diameter section 2, the inner end of the oil injection hole 5 is connected with the bottom end of the oil supply chamber 3 through an oil through hole 6, an armature 7 is slidably installed near the top end of the valve body 1, the needle valve 4 is drivingly connected to the armature 7, a cleaning slip ring 8 coaxial with the reduced diameter section 2 is slidably installed at the bottom end of the valve body 1, the inner diameter of the cleaning slip ring 8 is equal to the outer diameter of the reduced diameter section 2, a linkage slide plate 9 is slidably installed inside the valve body 1, the bottom end of the linkage slide plate 9 is fixedly connected to the cleaning slip ring 8, the top end of the linkage slide plate 9 and the side of the armature 7 are provided with a matching connection mechanism, the side of the oil through hole 6 is connected with an oil return hole 10, and the oil return hole 10 is opened. The hole 10 is driven and connected with the connecting mechanism, and a contactor 11 is arranged on the connecting mechanism on the armature 7, and the contactor 11 is connected with the alarm in the car; a cleaning slip ring 8 is slidingly arranged on the outer surface of the reduced diameter section 2, and the cleaning slip ring 8 is connected to the armature 7 through the linkage slide plate 9 and the connecting mechanism. When too much carbon deposits adhere to the outer surface of the reduced diameter section 2 and cause the injection hole 5 to be blocked, the fuel cannot be sprayed out from the injection hole 5. Under the action of pressure, the fuel will enter the return oil hole 10 and then drive the connecting mechanism to trigger the contactor 11 to remind the driver in the car, and at the same time, the linkage slide plate 9 is connected with the armature 7. When the armature 7 slides up and down normally, it will drive the cleaning slip ring 8 to slide up and down through the linkage slide plate 9 to scrape off the carbon deposits on the outer surface of the reduced diameter section 2. This setting can not only remind the driver, but also temporarily dredge the injection hole 5, so that the driver can clean the injector in time after driving.

[0029] like Figure 1-2 As shown, a mounting head 12 is fixedly mounted on the top of the valve body 1 , an oil inlet pipe 13 is fixedly mounted on the side of the valve body 1 , the oil inlet pipe 13 is connected to the top of the oil supply chamber 3 , and a filter screen 14 is fixedly mounted inside the oil inlet pipe 13 .

[0030] like Figure 2 and Figure 5 As shown, a driving chamber 15 is opened near the top of the valve body 1, and an electromagnetic coil 16 is fixedly installed on the top of the driving chamber 15. The electromagnetic coil 16 is annular, and an electric connector 17 is fixedly installed on the top of the side of the valve body 1. The electric connector 17 is electrically connected to the electromagnetic coil 16. A mounting plate 18 is fixedly installed on the side of the driving chamber 15, and the armature 7 is slidably installed on the mounting plate 18. The top of the armature 7 is connected to the top of the driving chamber 15 through a first resisting spring 19. An oil outlet pipe 20 is fixedly installed on the side of the valve body 1, and the oil outlet pipe 20 is connected to the bottom end of the driving chamber 15.

[0031] like Figure 2As shown, a vertical cavity 21 is connected to the bottom of the driving cavity 15, and the needle valve 4 slides in the vertical cavity 21 near the top. A first spring cavity 22 is opened on the side of the vertical cavity 21, and a first spring seat 23 is fixedly installed on the side of the needle valve 4. A second abutting spring 24 is arranged between the upper surface of the first spring seat 23 and the top of the first spring cavity 22. When the lower surface of the first spring seat 23 abuts against the bottom end of the first spring cavity 22, the bottom end of the needle valve 4 abuts against the top end of the oil hole 6.

[0032] like Figure 2 and Figure 6 As shown, a second spring chamber 25 coaxial with the reduced diameter section 2 is provided near the bottom end of the valve body 1, the top end of the cleaning slip ring 8 slides in the second spring chamber 25, a second spring seat 26 is coaxially fixedly installed on the top end of the outer surface of the cleaning slip ring 8, a third abutting spring 27 is provided between the lower surface of the second spring seat 26 and the bottom end of the second spring chamber 25, when the upper surface of the second spring seat 26 abuts against the top end of the second spring chamber 25, the bottom end of the cleaning slip ring 8 is located above the oil injection hole 5.

[0033] like Figure 2 As shown, the top of the second spring cavity 25 is connected to a linkage sliding cavity 28, the top of the linkage sliding cavity 28 is connected to the bottom of the driving cavity 15, the linkage slide 9 slides in the linkage sliding cavity 28, the bottom end of the linkage slide 9 is fixedly connected to the upper surface of the second spring seat 26, the top of the linkage slide 9 extends into the driving cavity 15, and the two sides of the linkage slide 9 respectively abut against the two sides of the linkage sliding cavity 28.

[0034] like Figure 3 As shown, the connecting mechanism includes a transverse plate 29 and an inner plug hole 30. The transverse plate 29 is integrally installed on the top of the linkage slide plate 9. The inner plug hole 30 is opened on the side of the armature 7 close to the linkage slide plate 9. The contactor 11 is installed at the inner end of the inner plug hole 30. A slide plate cavity 31 is opened on the side of the transverse plate 29 close to the armature 7. A connecting slide plate 33 is slidably installed inside the slide plate cavity 31 through a tension spring 32. An oil filling hole 34 is opened inside the linkage slide plate 9, and the top of the oil filling hole 34 is connected to the slide plate cavity 31.

[0035] like Figure 2 As shown, a transfer chamber 35 is provided on the side of the linkage sliding chamber 28, the oil return hole 10 is connected to the transfer chamber 35, the bottom end of the oil filling hole 34 is connected to the transfer chamber 35, the top end of the oil return hole 10 is connected to the driving chamber 15, and an overflow valve 36 is provided near the top end of the oil return hole 10. When the second spring seat 26 is located at the top end of the second spring chamber 25, the bottom end of the oil filling hole 34 is connected to the position of the transfer chamber 35 near the top end. When the second spring seat 26 is located at the bottom end of the second spring chamber 25, the bottom end of the oil filling hole 34 is connected to the position of the transfer chamber 35 near the bottom end.

[0036] Working principle:

[0037] During normal operation, the fuel injector is mounted on the mounting bracket of the automobile through the mounting head 12, the external power supply is connected to the electrical connector 17, the electromagnetic coil 16 is energized, the external high-pressure fuel supply pipe is connected to the fuel inlet pipe 13, and the fuel outlet pipe 20 is connected to the fuel tank. When the electromagnetic coil 16 is energized, the armature 7 is attracted to overcome the elastic force of the first resisting spring 19 and slide upward, and the needle valve 4 also slides upward under the attraction of the armature 7, the top of the oil through hole 6 is opened, and the fuel in the fuel supply chamber 3 is sprayed out through the atomization of the fuel injection hole 5. When the electromagnetic coil 16 is de-energized, the armature 7 slides down and resets under the resisting of the first resisting spring 19, and the needle valve 4 also slides down and resets under the resisting of the second resisting spring 24, and the top of the oil through hole 6 is re-blocked. When too much carbon deposits adhere to the outer surface of the reduced diameter section 2, causing the fuel injection hole 5 to be blocked and the fuel cannot be sprayed out, after the armature 7 and the needle valve 4 rise, the fuel in the fuel supply chamber 3 cannot be sprayed out from the fuel injection hole 5, and will enter the oil return hole 1 0, then enters the transfer chamber 35, then enters the oil filling hole 34 from the transfer chamber 35, and finally enters the slide plate chamber 31 to press out the connecting slide plate 33, so that the connecting slide plate 33 is inserted into the inner plug hole 30, triggering the contactor 11 to remind the driver in the car, and then when the electromagnetic coil 16 is powered off, the armature 7 drives the cleaning slip ring 8 to slide down through the linkage slide plate 9, and the carbon deposits on the outer surface of the reduced diameter section 2 are scraped off, and then the armature 7 reciprocates up and down to drive the cleaning slip ring 8 to slide up and down, and the outer surface of the reduced diameter section 2 is cleaned multiple times until the injection hole 5 is unblocked, the fuel in the oil filling hole 34 flows out through the injection hole 5, and the connecting slide plate 33 is separated from the inner plug hole 30. When the pressure in the oil supply chamber 3 is too high and the injection hole 5 is in a blocked state, the fuel in the return hole 10 that cannot enter the oil filling hole 34 will enter the drive chamber 15, and then flow from the oil outlet pipe 20 to the external oil receiving tank, which can ensure the pressure balance inside the injector.

[0038] It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0039] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. An automobile fuel injection nozzle detection device, comprising a valve body (1), characterized in that: The bottom end of the valve body (1) is integrally mounted with a reduced diameter section (2); an oil supply chamber (3) is provided in the interior of the valve body (1) near the bottom end; a needle valve (4) is slidably mounted in the interior of the oil supply chamber (3); an oil injection hole (5) is provided in the reduced diameter section (2) near the bottom end; the inner end of the oil injection hole (5) is connected to the bottom end of the oil supply chamber (3) via an oil through hole (6); an armature (7) is slidably mounted in the interior of the valve body (1) near the top end; the needle valve (4) is drivingly connected to the armature (7); a cleaning valve coaxial with the reduced diameter section (2) is slidably mounted in the bottom end of the valve body (1); A slip ring (8), the inner diameter of the cleaning slip ring (8) is equal to the outer diameter of the reduced diameter section (2), a linkage slide plate (9) is slidably mounted inside the valve body (1), the bottom end of the linkage slide plate (9) is fixedly connected to the cleaning slip ring (8), the top end of the linkage slide plate (9) and the side of the armature (7) are provided with a matching connection mechanism, the side of the oil through hole (6) is connected to an oil return hole (10), the oil return hole (10) is drivingly connected to the connection mechanism, a contactor (11) is provided on the connection mechanism on the armature (7), and the contactor (11) is connected to an in-vehicle alarm.

2. The automobile fuel injection nozzle detection device according to claim 1, characterized in that: A mounting head (12) is fixedly mounted on the top of the valve body (1), an oil inlet pipe (13) is fixedly mounted on the side of the valve body (1), the oil inlet pipe (13) is connected to the top of the oil supply chamber (3), and a filter screen (14) is fixedly mounted inside the oil inlet pipe (13).

3. The automobile fuel injection nozzle detection device according to claim 2, characterized in that: A driving chamber (15) is provided near the top of the valve body (1), and an electromagnetic coil (16) is fixedly mounted on the top of the driving chamber (15). The electromagnetic coil (16) is annular. An electric connector (17) is fixedly mounted on the top of the side of the valve body (1), and the electric connector (17) is electrically connected to the electromagnetic coil (16). A mounting plate (18) is fixedly mounted on the side of the driving chamber (15), and the armature (7) is slidably mounted on the mounting plate (18). The top of the armature (7) is connected to the top of the driving chamber (15) via a first resisting spring (19). An oil outlet pipe (20) is fixedly mounted on the side of the valve body (1), and the oil outlet pipe (20) is connected to the bottom of the driving chamber (15).

4. The automobile fuel injection nozzle detection device according to claim 3, characterized in that: The bottom of the drive chamber (15) is connected to a vertical chamber (21), and the needle valve (4) slides in the vertical chamber (21) at a position close to the top. A first spring chamber (22) is provided on the side of the vertical chamber (21). A first spring seat (23) is fixedly mounted on the side of the needle valve (4). A second abutting spring (24) is provided between the upper surface of the first spring seat (23) and the top of the first spring chamber (22). When the lower surface of the first spring seat (23) abuts against the bottom end of the first spring chamber (22), the bottom end of the needle valve (4) abuts against the top end of the oil through hole (6).

5. The automobile fuel injection nozzle detection device according to claim 4, characterized in that: A second spring chamber (25) coaxial with the reduced diameter section (2) is provided in the valve body (1) near the bottom end thereof. The top end of the cleaning slip ring (8) slides in the second spring chamber (25). A second spring seat (26) is coaxially fixedly mounted on the top end of the outer surface of the cleaning slip ring (8). A third abutting spring (27) is provided between the lower surface of the second spring seat (26) and the bottom end of the second spring chamber (25). When the upper surface of the second spring seat (26) abuts against the top end of the second spring chamber (25), the bottom end of the cleaning slip ring (8) is located above the oil injection hole (5).

6. The automobile fuel injection nozzle detection device according to claim 5, characterized in that: The top end of the second spring cavity (25) is connected to a linkage sliding cavity (28), the top end of the linkage sliding cavity (28) is connected to the bottom of the driving cavity (15), the linkage slide plate (9) slides in the linkage sliding cavity (28), the bottom end of the linkage slide plate (9) is fixedly connected to the upper surface of the second spring seat (26), the top end of the linkage slide plate (9) extends into the driving cavity (15), and two sides of the linkage slide plate (9) respectively abut against two sides of the linkage sliding cavity (28).

7. The automobile fuel injection nozzle detection device according to claim 6, characterized in that: The connecting mechanism comprises a transverse plate (29) and an inner plug hole (30), wherein the transverse plate (29) is integrally mounted on the top end of the linkage slide plate (9), the inner plug hole (30) is provided on a side of the armature (7) close to the linkage slide plate (9), the contactor (11) is mounted on the inner end of the inner plug hole (30), a slide plate cavity (31) is provided on a side of the transverse plate (29) close to the armature (7), a connecting slide plate (33) is slidably mounted inside the slide plate cavity (31) via a tension spring (32), and an oil filling hole (34) is provided inside the linkage slide plate (9), the top end of the oil filling hole (34) being connected to the slide plate cavity (31).

8. The automobile fuel injection nozzle detection device according to claim 7, characterized in that: A transfer chamber (35) is provided on the side of the linkage sliding chamber (28); the oil return hole (10) is connected to the transfer chamber (35); the bottom end of the oil filling hole (34) is connected to the transfer chamber (35); the top end of the oil return hole (10) is connected to the driving chamber (15); a relief valve (36) is provided near the top end of the oil return hole (10); when the second spring seat (26) is located at the top end of the second spring chamber (25), the bottom end of the oil filling hole (34) is connected to a position near the top end of the transfer chamber (35); when the second spring seat (26) is located at the bottom end of the second spring chamber (25), the bottom end of the oil filling hole (34) is connected to a position near the bottom end of the transfer chamber (35).

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