An actual fuel injection pressure detection device for an injector

Abstract

The present invention provides a device for detecting the actual injection pressure of an injector, which includes a tubular detection housing. A sealing ring is horizontally and fixedly connected to the upper part inside the detection housing, and two arc-shaped clamping blocks are oppositely arranged on the upper side of the sealing ring. A horizontally arranged adjusting screw rod is rotatably connected to the outer side wall of each arc-shaped clamping block, and the outer end of the adjusting screw rod passes through the detection housing. A connecting pipe is fixedly sleeved on the lower part of the inner side wall of the detection housing, and a piston moving plate capable of vertically moving along the connecting pipe is connected inside the connecting pipe. The circumferential side wall of the piston moving plate is in contact with the inner side wall of the connecting pipe, and a pressure sensor is arranged at the bottom of the piston moving plate. The beneficial effects of the present invention are as follows: The method for detecting the actual injection pressure of the injector by this detection device is more convenient and fast, and there are no experience and technical requirements for the detection personnel, thereby improving the detection efficiency.

Description

Technical Field

[0001] The present invention belongs to the technical field of fuel injector pressure detection, and particularly relates to a device for detecting the actual fuel injection pressure of a fuel injector. Background Art

[0002] After a fuel injector has been used for a long time or when it leaves the factory, it is necessary to maintain and detect the fuel injector. During the maintenance and detection process, it is often necessary to detect the actual fuel injection pressure of the fuel injector to determine whether the fuel injector is in a qualified state.

[0003] Currently, the method for detecting the actual fuel injection pressure of a fuel injector requires skilled workers, and has relatively high technical requirements for personnel, which limits the detection level and detection efficiency of operators. Summary of the Invention

[0004] In view of this, the present invention aims to overcome the above deficiencies in the prior art and proposes a device for detecting the actual fuel injection pressure of a fuel injector.

[0005] To achieve the above object, the technical solution of the present invention is realized as follows:

[0006] A device for detecting the actual fuel injection pressure of a fuel injector includes a tubular detection housing. Horizontally and fixedly connected to the upper part inside the detection housing is a sealing ring, and two arc-shaped clamping blocks are oppositely arranged above the sealing ring. Horizontally arranged adjusting threaded rods are rotatably connected to the outer side walls of each arc-shaped clamping block, and the outer ends of the adjusting threaded rods extend out of the detection housing. A connecting pipe is fixedly sleeved on the lower part of the inner side wall of the detection housing. A piston moving plate that can move vertically along the connecting pipe is connected inside the connecting pipe. The circumferential side wall of the piston moving plate is in contact with the inner side wall of the connecting pipe, and a pressure sensor is provided at the bottom of the piston moving plate.

[0007] Furthermore, an elastic telescopic rod is vertically and fixedly connected to the bottom of the piston moving plate. The bottom end of the elastic telescopic rod is fixedly connected to a moving pressing plate, and a moving conduit is fixedly sleeved on the outer side of the moving pressing plate. A connecting rod is horizontally and fixedly connected to the bottom of the moving conduit. Oppositely arranged moving screws are vertically screwed on both sides of the connecting rod. An adjusting block is screwed on the upper part of each moving screw. A connecting ring is commonly fixedly connected to the upper surfaces of the two adjusting blocks, and the connecting ring is fixedly connected to the bottom end surface of the connecting pipe. The pressure sensor is fixedly connected inside the moving conduit and abuts against the bottom of the moving pressing plate at one end.

[0008] Furthermore, two threaded grooves are oppositely arranged on the outer side wall of the connecting pipe. A fixing screw is screwed in each threaded groove, and the fixing screw horizontally passes through the detection housing.

[0009] Furthermore, a pushing plate is fixedly connected to the lower part of each moving screw, and the upper surface of the pushing plate abuts tightly against the bottom of the connecting rod.

[0010] Further, a rotating plate is fixedly connected to the bottom of each moving screw.

[0011] Further, a display with a data processing module is installed on the detection housing, and the pressure sensor is electrically connected to the data processing module.

[0012] Further, a mounting plate is fixedly connected to the outer side wall of the detection housing corresponding to the adjusting threaded rod, and a through hole is opened on the detection housing corresponding to the adjusting threaded rod. The adjusting threaded rod passes through the through hole and the mounting plate and is screwed together with the mounting plate.

[0013] Further, a rubber sealing pad is bonded to the bottom of each arc-shaped block, and the bottom of the rubber sealing pad is in contact with the upper surface of the sealing ring.

[0014] Further, a sealing ring is bonded to the bottom of the sealing ring.

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] In the actual injection pressure detection device of the injector described in the present invention, by setting the arc-shaped block and the adjusting threaded rod, first, the detection housing and the sealing ring are sleeved on the outer side wall of the injector, and then the adjusting threaded rod is rotated so that the two arc-shaped blocks fixedly install the detection housing on the injector. The fuel supply system at the rear end of the injector is started, so that the injector sprays fuel into the detection housing. The sprayed oil pressure will be converted into a driving force in the closed space to push the piston moving plate to move. The pressure is transmitted to the pressure sensor through the piston moving plate, so that the method of detecting the actual injection pressure of the injector by this detection device is more simple and fast, and there are no experience and technical requirements for the detection personnel, thereby improving the detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0018] Figure 1 is a schematic structural diagram of the actual injection pressure detection device of the injector described in the embodiment of the present invention installed on the injector;

[0019] Figure 2 is a structural cross-sectional view of the actual injection pressure detection device of the injector described in the embodiment of the present invention;

[0020] Figure 3 is Figure 2 a partial enlarged view of A in

[0021] Figure 4 is Figure 2 a partial enlarged view of B in

[0022] Description of the reference numerals in the drawings:

[0023] 1. Fuel injector; 2. Detection housing; 3. Display; 4. Connecting rod; 5. Moving screw; 6. Fixing screw; 7. Rotating plate; 8. Connecting pipe; 9. Piston moving plate; 10. Threaded groove; 11. Perforation; 12. Mounting plate; 13. Arc-shaped clamping block; 14. Adjusting threaded rod; 15. Rubber gasket; 16. Sealing ring; 17. Sealing ring; 18. Elastic telescopic rod; 19. Pushing plate; 20. Moving conduit; 21. Pressure sensor; 22. Moving pressure plate; 23. Connecting ring; 24. Adjusting block. Detailed implementation manners

[0024] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments may be combined with each other.

[0025] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0026] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "mount", "connect", "couple" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood through specific situations.

[0027] The present invention will be described in detail below with reference to the drawings and in combination with the embodiments.

[0028] As shown in the figure, a detecting device for the actual fuel injection pressure of an injector includes a tubular detecting housing 2. Horizontally and fixedly connected to the upper part inside the detecting housing 2 is a sealing ring 16. Oppositely arranged on the upper side of the sealing ring 16 are two arc-shaped clamping blocks 13. Horizontally arranged adjusting threaded rods 14 are rotatably connected to the outer side walls of each arc-shaped clamping block 13, and the outer ends of the adjusting threaded rods 14 penetrate through the detecting housing 2. Fixedly sleeved on the lower part of the inner side wall of the detecting housing 2 is a connecting pipe 8. Connected inside the connecting pipe 8 is a piston moving plate 9 that can move vertically along the connecting pipe 8. The circumferential side wall of the piston moving plate 9 is in contact with the inner side wall of the connecting pipe 8, and a pressure sensor 21 is provided at the bottom of the piston moving plate 9.

[0029] Vertically and fixedly connected to the bottom of the piston moving plate 9 is an elastic telescopic rod 18. The bottom end of the elastic telescopic rod 18 is fixedly connected to a moving pressing plate 22. A moving conduit 20 is fixedly sleeved on the outer side of the moving pressing plate 22. Horizontally and fixedly connected to the bottom of the moving conduit 20 is a connecting rod 4. Oppositely arranged and vertically screwed on both sides of the connecting rod 4 are moving screws 5. An adjusting block 24 is screwed on the upper part of each moving screw 5. A connecting ring 23 is fixedly connected to the common upper surface of the two adjusting blocks 24, and the connecting ring 23 is fixedly connected to the bottom end face of the connecting pipe 8. The pressure sensor 21 is fixedly connected inside the moving conduit 20 and abuts against the bottom of the moving pressing plate 22 at one end.

[0030] Oppositely arranged on the outer side wall of the connecting pipe 8 are two threaded grooves 10. A fixing screw 6 is screwed in each threaded groove 10, and the fixing screw 6 horizontally penetrates through the detecting housing 2.

[0031] A pushing plate 19 is fixedly connected to the lower part of each moving screw 5, and the upper surface of the pushing plate 19 abuts tightly against the bottom of the connecting rod 4.

[0032] A rotating plate 7 is fixedly connected to the bottom of each moving screw 5, which is convenient for manual operation to rotate the moving screw 5.

[0033] A display 3 with a data processing module is installed on the detecting housing 2, and the pressure sensor 21 is electrically connected to the data processing module. The pressure situation detected by the pressure sensor 21 is displayed through the display 3.

[0034] An installation plate 12 is fixedly connected to the outer side wall of the detecting housing 2 corresponding to the adjusting threaded rod 14. A perforation 11 is provided on the detecting housing 2 corresponding to the adjusting threaded rod 14. The adjusting threaded rod 14 passes through the perforation 11 and the installation plate 12 and is screwed together with the installation plate 12.

[0035] A rubber sealing pad 15 is bonded to the bottom of each arc-shaped clamping block 13, and the bottom of the rubber sealing pad 15 is in contact with the upper surface of the sealing ring 16. In this embodiment, the provided rubber sealing pad 15 is used to block the connection between the sealing ring 16 and the outside of the injector 1, improving the sealing effect of the entire detecting device.

[0036] A sealing ring 17 is adhesively bonded to the bottom of the sealing ring 16, which can make the sealing effect of the sealing ring 16 better.

[0037] The working process of this embodiment is as follows:

[0038] First, the detection housing 2 and the sealing ring 16 are sleeved on the outer wall of the fuel injector 1. Then, the adjusting threaded rod 14 is rotated so that the two arc-shaped clamping blocks 13 fixedly install the detection housing 2 on the fuel injector 1. The rubber gasket 15 and the sealing ring 17 provided can seal the equipment. After the connecting pipe 8 is inserted into the detection housing 2, the two are fixed by means of the fixing screw 6 and the threaded groove 10. By rotating the moving screw 5, the moving screw 5 then performs a threaded movement within the adjusting block 24, and the moving screw 5 moves. With the assistance of the pushing plate 19, the connecting rod 4 is driven to move. After the connecting rod 4 moves, the moving conduit 20 and the pressure sensor 21 installed on the connecting rod 4 move forward. The moving pressing plate 22 in the moving conduit 20 drives the elastic telescopic rod 18 and the piston moving plate 9 to continuously push inward, so that the sealed space inside the detection housing 2 is in a high-pressure state, and the oil pressure can be measured more accurately. After moving to the appropriate test position, the display 3 shows the current pressure in the sealed space. The fuel supply system at the rear end of the fuel injector 1 is started, so that the fuel injector 1 injects fuel into the detection housing 2. The ejected oil pressure is converted into a driving force in the sealed space to push the piston moving plate 9 to move, and then the pressure is transmitted to the moving pressing plate 22 and the pressure sensor 21 through the piston moving plate 9, and finally the pressure in the sealed space is displayed through the display 3. The actual injection pressure of the fuel injector 1 is determined according to the difference between the pressure values displayed by the display 3 before and after the fuel injector 1 injects fuel.

[0039] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An actual injection pressure detection device for an injector, characterized in that: It includes a tubular detection housing. Horizontally fixed inside the upper part of the detection housing is a sealing ring. Two arc-shaped clamping blocks are oppositely arranged above the sealing ring. Horizontally arranged adjusting threaded rods are rotatably connected to the outer side walls of each arc-shaped clamping block, and the outer ends of the adjusting threaded rods penetrate through the detection housing. A connecting pipe is fixedly sleeved on the lower part of the inner side wall of the detection housing. A piston moving plate that can move vertically along the connecting pipe is connected inside the connecting pipe. The circumferential side wall of the piston moving plate is in contact with the inner side wall of the connecting pipe, and a pressure sensor is provided at the bottom of the piston moving plate. Vertically fixed at the bottom of the piston moving plate is an elastic telescopic rod. The bottom end of the elastic telescopic rod is fixedly connected with a moving pressing plate. A moving conduit is fixedly sleeved on the outer side of the moving pressing plate. Horizontally fixed at the bottom of the moving conduit is a connecting rod. Oppositely arranged moving screws are vertically screwed on both sides of the connecting rod. Adjusting blocks are screwed on the upper part of each moving screw. A connecting ring is fixedly connected to the common upper surface of the two adjusting blocks, and the connecting ring is fixedly connected to the bottom end surface of the connecting pipe. The pressure sensor is fixedly connected inside the moving conduit and abuts against the bottom of the moving pressing plate at one end.

2. The actual injection pressure detection device for an injector according to claim 1, characterized in that: Two threaded grooves are oppositely arranged on the outer side wall of the connecting pipe. A fixing screw is screwed in each threaded groove, and the fixing screw horizontally penetrates through the detection housing.

3. The actual injection pressure detection device for an injector according to claim 1, characterized in that: A pushing plate is fixedly connected to the lower part of each moving screw, and the upper surface of the pushing plate abuts tightly against the bottom of the connecting rod.

4. The actual injection pressure detection device for an injector according to claim 3, characterized in that: A rotating plate is fixedly connected to the bottom of each moving screw.

5. The actual injection pressure detection device for an injector according to claim 1, characterized in that: A display with a data processing module is installed on the detection housing, and the pressure sensor is electrically connected to the data processing module.

6. The actual injection pressure detection device for an injector according to claim 1, characterized in that: An installation plate is fixedly connected to the outer side wall of the detection housing corresponding to the adjusting threaded rod. A perforation is opened on the detection housing corresponding to the adjusting threaded rod. The adjusting threaded rod passes through the perforation and the installation plate and is screwed together with the installation plate.

7. The actual injection pressure detection device for an injector according to claim 1, characterized in that: A rubber sealing pad is bonded to the bottom of each arc-shaped clamping block, and the bottom of the rubber sealing pad is in contact with the upper surface of the sealing ring.

8. The actual injection pressure detection device for an injector according to claim 1, characterized in that: A sealing ring is bonded to the bottom of the sealing ring.

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