CN218934602U

CN218934602U - Fuel injector mounting structure of four-valve engine

Info

Publication number: CN218934602U
Application number: CN202223413972.2U
Authority: CN
Inventors: 陈镇培; 秦江福; 曹杨军; 陶国裕
Original assignee: Guangxi Yuchai Machinery Co Ltd
Current assignee: Guangxi Yuchai Machinery Co Ltd
Priority date: 2022-12-19
Filing date: 2022-12-19
Publication date: 2023-04-28
Anticipated expiration: 2032-12-19

Abstract

The utility model discloses an oil sprayer mounting structure of a four-valve engine, which comprises a cylinder cover, a cylinder cover and an oil sprayer, wherein the cylinder cover is arranged on the top surface of the cylinder cover, and a mounting hole for mounting the oil sprayer is formed in the top surface of the cylinder cover; the oil sprayer comprises an assembling end and a wiring end, wherein the assembling end is arranged in the mounting hole, and the wiring end extends out of the cylinder cover; the oil sprayer is characterized by further comprising a pressing mechanism, wherein the pressing mechanism is arranged on the top surface of the cylinder cover and comprises a lock clamp, a pressing bolt and a balance rod, a through hole is formed in the middle of the lock clamp and is rotationally connected with the upper part of the pressing bolt through the through hole, the front end of the lock clamp is connected with the oil sprayer, and the lower side of the rear end of the lock clamp is abutted to the top of the balance rod; the lower ends of the compression bolt and the balance rod are connected to the top surface of the cylinder cover; the lower end of the compression bolt is in threaded connection with the cylinder cover; the cylinder head cover is provided with a yielding port corresponding to the position of the mounting hole. The utility model has the advantages of simple structure, improved disassembly and assembly efficiency of the fuel injector, and the like.

Description

Fuel injector mounting structure of four-valve engine

Technical Field

The utility model relates to the technical field of engine fuel injectors, in particular to a fuel injector mounting structure of a four-valve engine.

Background

With the continuous improvement of the national emission level of the engine, in order to ensure that the engine meets the emission requirement, the traditional mechanical fuel injector needs to be changed into an electric control fuel injector. Because some engines are limited by design, the electronic control fuel injector is arranged inside the cylinder head cover, which brings inconvenience to the disassembly, assembly and maintenance of the electronic control fuel injector.

For a four-valve engine, the fuel injector is required to be arranged at the middle position above the cylinder, and the traditional fuel injector is arranged in a scheme that: the fuel injector is internally arranged and arranged in the cylinder head cover; disadvantages: the fuel injector is inconvenient to replace, and the cylinder cover is required to be disassembled.

The prior art CN105822452B improves the assembly problem of the fuel injector, and improves the disassembly and assembly efficiency of the fuel injector to a certain extent, but still needs to move the cylinder head cover when disassembling and assembling the fuel injector. Therefore, the application develops a new oil sprayer mounting structure, so that the disassembly and assembly of the oil sprayer are further simplified, and the working efficiency is improved.

The foregoing background is only for the purpose of facilitating an understanding of the principles and concepts of the utility model and is not necessarily in the prior art to the present application and is not intended to be used as an admission that such background is not entitled to antedate such novelty and creativity by the present application without undue evidence prior to the present application.

Disclosure of Invention

The utility model aims to provide a fuel injector mounting structure of a four-valve engine with a simple structure and convenient disassembly and assembly and a use method thereof.

Therefore, the utility model provides a fuel injector mounting structure of a four-valve engine.

Preferably, the present utility model may further have the following technical features:

the oil sprayer mounting structure of the four-valve engine comprises a cylinder cover, a cylinder cover and an oil sprayer, wherein the cylinder cover is arranged on the top surface of the cylinder cover, and mounting holes for mounting the oil sprayer are formed in the cylinder cover; the oil sprayer comprises an assembling end and a wiring end, wherein the assembling end is arranged in the mounting hole, and the wiring end extends out of the cylinder cover; the oil sprayer is characterized by further comprising a pressing mechanism, wherein the pressing mechanism is arranged on the top surface of the cylinder cover and comprises a lock clamp, a pressing bolt and a balance rod, a through hole is formed in the middle of the lock clamp and is rotationally connected with the upper part of the pressing bolt through the through hole, the front end of the lock clamp is connected with the oil sprayer, and the lower side of the rear end of the lock clamp is abutted to the top of the balance rod; the lower ends of the compression bolt and the balance rod are connected to the top surface of the cylinder cover; the lower end of the compression bolt is in threaded connection with the cylinder cover; the cylinder cover is provided with a yielding port corresponding to the mounting hole, so that the wiring end of the fuel injector is exposed out of the coverage range of the cylinder cover.

Further, the upper end of the balance rod is a hemispherical surface, and the lower end of the balance rod is in threaded connection with the cylinder cover.

Further, the diameter of the through hole is larger than the diameter of the compression bolt rod and smaller than the outer diameter of the compression bolt head.

Further, the locking clamp is clamped with the fuel injector.

Further, one end of the locking clamp, which is connected with the oil sprayer, is provided with a U-shaped opening, two sides of the oil sprayer are provided with flat positions which are connected with the U-shaped opening, and the lower ends of the flat positions form a limiting surface.

Further, the U-shaped opening is in clearance fit with the flat.

Further, the top surface of the cylinder cover is a step surface, and the height of one side of the cylinder cover provided with the abdication opening is lower than that of the other side.

Further, the yielding port is formed by inwards sinking one side of the cylinder cover by a certain size.

Further, a reinforcing rib plate is arranged at the lower end of the cylinder head cover, the reinforcing rib plate forms an everting surface, and an assembly hole of a connecting bolt is formed in the surface of the reinforcing rib plate.

Compared with the prior art, the utility model has the beneficial effects that: pressing mechanism, pencil interface etc. equipartition are in the outside of cylinder cap cover, and the dismouting of sprayer only needs to adjust pressing mechanism, easy dismounting, simple improves work efficiency. The setting of hold-down mechanism restricts the fuel sprayer axial float on the one hand, and on the other hand can also restrict the fuel sprayer rotation through the connection of U-shaped opening and flat position, simple structure is reliable.

Drawings

Fig. 1 is a partial perspective view of the present utility model.

FIG. 2 is a partial view of the present utility model, excluding the fuel injector and hold-down mechanism.

Fig. 3 is a partial top view of the present utility model.

Fig. 4 is a cross-sectional view of C-C in fig. 3.

Detailed Description

The utility model will be described in further detail with reference to the following detailed description and with reference to the accompanying drawings. It should be emphasized that the following description is merely exemplary in nature and is in no way intended to limit the scope of the utility model or its applications.

Non-limiting and non-exclusive embodiments will be described with reference to the following drawings, in which like reference numerals refer to like elements unless otherwise specified.

The fuel injector mounting structure of the four-valve engine as shown in fig. 1 to 4 comprises a cylinder cover 1, a cylinder cover 4 and a fuel injector 3, wherein a mounting hole 11 for mounting the fuel injector 3 and the cylinder cover 4 are arranged on the top surface of the cylinder cover 1; the fuel injector 3 includes an assembling end which is installed in the installation hole 11, and a terminal which extends outside the cylinder head 1. The cylinder head cover 4 is provided with a relief port 43 corresponding to the position of the mounting hole 11, so that the wiring terminal of the fuel injector 3 is exposed outside the coverage area of the cylinder head cover 4. By arranging the abdication port 43 on the cylinder cover 4, the oil sprayer 3 can be dismounted and mounted without interfering with the cylinder cover 4 when the oil sprayer 3 is dismounted and mounted, and the oil sprayer 3 can be dismounted and mounted without dismounting or moving the cylinder cover 4, so that the working flow is simplified, and the working efficiency is improved.

The cylinder cover is characterized by further comprising a pressing mechanism 2, wherein the pressing mechanism 2 is arranged on the top surface of the cylinder cover 1 and comprises a locking clamp 22, a pressing bolt 23 and a balance rod 21. A through hole 25 is formed in the middle of the lock clamp 22 and is in rotary connection with the compression bolt 23 through the through hole 25, and the diameter of the through hole 25 is larger than that of the compression bolt rod and smaller than the outer diameter of the compression bolt head; the front end of the lock clip 22 is connected to the fuel injector 3, and the lower side of the rear end abuts against the top of the balance bar 21. The lower ends of the compression bolt 23 and the balance rod 21 are in threaded connection with the top surface of the cylinder cover 1, and correspondingly, screw holes matched with the compression bolt 23 and the balance rod 21 are formed in the top surface of the cylinder cover 1. Preferably, the upper end of the balance bar 21 is a hemispherical surface.

Preferably, the locking clamp 22 is clamped with the fuel injector 3, so that the disassembly and assembly efficiency is improved. Specifically, a U-shaped opening 24 is formed at one end of the locking clip 22 connected with the fuel injector 3, flat bits 31 are arranged at two sides of the fuel injector 3 and connected with the U-shaped opening 24, and a limit surface is formed at the lower end of the flat bits 31. Preferably, the U-shaped opening 24 and the flat 31 are in clearance fit. In this way, when in installation, firstly, the balance bar 21 is connected to the top surface of the cylinder cover 1, so that the level of the upper end of the installed balance bar 21 and the limit surface of the flat position 31 is basically leveled or within a certain fall range; then the U-shaped opening 24 of the locking clamp 22 is clamped at the flat position 31 of the fuel injector 3, and the rear end of the locking clamp 22 is abutted against the upper end of the balance rod 21; then the pressing bolt 23 is screwed into a screw hole on the top surface of the cylinder cover 1 after penetrating through a through hole 25 of the locking clamp 22, the locking clamp 22 is driven to move downwards by screwing the pressing bolt 23, so that two sides of a U-shaped opening 24 at the front end of the locking clamp 22 are pressed on the limit surface of the flat position 31, and the rear end is limited by the balance rod 21 and cannot move downwards; the tightening of the compression bolt 23 is continued to press the locking clamp 22, so that the oil sprayer 3 can be compressed in the mounting hole 11 by using the locking clamp 22, the oil sprayer 3 is prevented from loosening or popping out of the oil sprayer mounting hole 11, and the axial movement of the oil sprayer 3 is limited. In this embodiment, hold-down mechanism 2, pencil interface etc. of sprayer 3 equipartition are in the outside of cylinder cap cover 4, and the dismouting of sprayer 3 only needs to adjust hold-down mechanism 2, easy dismounting, simple improves work efficiency. The upper end of the installed balance rod 21 and the level of the limit surface of the flat position 31 do not need to be completely consistent, the purpose of pressing the fuel injector 3 can be realized through the swing of the locking clamp 22 within a certain fall range, and the assembly flexibility is high.

Referring to fig. 2, the top surface of the cylinder head cover 4 is a stepped surface, and the height of one side of the cylinder head cover 4 provided with the relief opening is lower than that of the other side. Under the condition of meeting the assembly requirement, the side of the lower top surface of the cylinder cover 4 can be pressed down as much as possible, and the side of the lower top surface of the cylinder cover 4 is provided with a large chamfer, so that the assembly space of the fuel injector 3 is increased. Preferably, the relief opening 43 is formed by recessing one side of the head cover 4 inward by a certain dimension. After the relief opening 43 is formed in the head cover 4, the strength of the head cover 4 is reduced. In order to enhance the strength of the head cover 43, a reinforcing rib plate 42 is provided along the lower end of the head cover 43, the reinforcing rib plate 42 forms an eversion surface, and the panel surface is provided with an assembly hole 41 for a connecting bolt.

A method for using the mounting structure of fuel injector of four-valve engine, connect the balance bar 21 to the top surface of cylinder cover 1 at first; then clamping the U-shaped opening of the locking clamp 22 at the flat position 31 of the fuel injector 3, and supporting the rear end of the locking clamp 22 by the balance rod 21; then the pressing bolt 23 is screwed into a screw hole on the top surface of the cylinder cover 1 after penetrating through a through hole 25 of the locking clamp 22, and the locking clamp 22 is driven to move downwards by screwing the pressing bolt 23, so that the fuel injector 3 is pressed.

Those skilled in the art will recognize that numerous variations are possible in light of the above description, and that the examples and figures are presented for the purpose of describing one or more particular embodiments only.

While there have been described and illustrated what are considered to be example embodiments of the present utility model, it will be understood by those skilled in the art that various changes and substitutions can be made therein without departing from the spirit of the utility model. In addition, many modifications may be made to adapt a particular situation to the teachings of the utility model without departing from the central concept thereof as described herein. Therefore, it is intended that the utility model not be limited to the particular embodiment disclosed, but that the utility model will include all embodiments falling within the scope of the utility model and equivalents thereof.

Claims

1. The oil sprayer mounting structure of the four-valve engine comprises a cylinder cover, a cylinder cover and an oil sprayer, wherein the cylinder cover is arranged on the top surface of the cylinder cover, and mounting holes for mounting the oil sprayer are formed in the cylinder cover; the oil sprayer comprises an assembling end and a wiring end, wherein the assembling end is arranged in the mounting hole, and the wiring end extends out of the cylinder cover; the method is characterized in that: the oil sprayer is characterized by further comprising a pressing mechanism, wherein the pressing mechanism is arranged on the top surface of the cylinder cover and comprises a lock clamp, a pressing bolt and a balance rod, a through hole is formed in the middle of the lock clamp and is rotationally connected with the upper part of the pressing bolt through the through hole, the front end of the lock clamp is connected with the oil sprayer, and the lower side of the rear end of the lock clamp is abutted to the top of the balance rod; the lower ends of the compression bolt and the balance rod are connected to the top surface of the cylinder cover; the lower end of the compression bolt is in threaded connection with the cylinder cover; the cylinder cover is provided with a yielding port corresponding to the mounting hole, so that the wiring end of the fuel injector is exposed out of the coverage range of the cylinder cover.

2. A four valve engine fuel injector mounting structure as defined in claim 1, wherein: the upper end of the balance rod is hemispherical, and the lower end of the balance rod is in threaded connection with the cylinder cover.

3. A four valve engine fuel injector mounting structure as defined in claim 1, wherein: the diameter of the through hole is larger than the diameter of the compression bolt rod and smaller than the outer diameter of the compression bolt head.

4. A four valve engine fuel injector mounting structure as defined in claim 1, wherein: the locking clamp is connected with the fuel injector in a clamping mode.

5. A four valve engine fuel injector mounting structure as defined in claim 4, wherein: the locking clamp is characterized in that a U-shaped opening is formed in one end, connected with the oil sprayer, of the locking clamp, flat positions are arranged on two sides of the oil sprayer and are connected with the U-shaped opening, and a limiting surface is formed at the lower end of each flat position.

6. A four valve engine fuel injector mounting structure as defined in claim 5, wherein: the U-shaped opening is in clearance fit with the flat position.

7. A four valve engine fuel injector mounting structure as defined in claim 1, wherein: the top surface of the cylinder cover is a step surface, and the height of one side of the cylinder cover provided with the abdication opening is lower than that of the other side.

8. A four valve engine fuel injector mounting structure as defined in claim 1, wherein: the yielding port is formed by inwards sinking one side of the cylinder cover by a certain size.

9. A four valve engine fuel injector mounting structure as defined in claim 1, wherein: the lower end of the cylinder head cover is provided with a reinforcing rib plate, the reinforcing rib plate forms an everting surface, and an assembly hole of a connecting bolt is formed in the surface of the reinforcing rib plate.