CN210564860U

CN210564860U - Vibration-damping noise-reducing oil sprayer and mounting structure thereof on cylinder cover

Info

Publication number: CN210564860U
Application number: CN201921009379.7U
Authority: CN
Inventors: 李文志; 卓瑞岩; 何元章; 李佳; 许国松
Original assignee: Dongfeng Motor Corp
Current assignee: Dongfeng Motor Corp
Priority date: 2019-07-01
Filing date: 2019-07-01
Publication date: 2020-05-19
Anticipated expiration: 2029-07-01

Abstract

The utility model relates to an automobile engine electricity injection system technical field discloses sprayer of making an uproar falls in damping, including sprayer main part and needle valve, the welding has last thrust piece on the shell body of sprayer main part, the welding has lower thrust piece on the shell body of needle valve, form the arc spacing groove between last thrust piece and the lower thrust piece, the damping gasket is installed to arc spacing inslot clearance fit, the damping gasket is from last superstructure to including in proper order down, middle part structure and substructure, the diameter of middle part structure is greater than substructure's diameter, middle part structure surface evenly distributed has the three-dimensional toper protruding structure of a plurality of triangle, the three-dimensional toper protruding structure of triangle is located same horizontal plane, superstructure's top and last thrust piece contact, substructure's bottom and lower thrust piece contact. The utility model also discloses a mounting structure of the sprayer of making an uproar falls in the damping on the cylinder cap. The utility model discloses sprayer of making an uproar and the mounting structure on the cylinder cap falls in the damping, and the damping is fallen the noise effectual, and durable reliable.

Description

Vibration-damping noise-reducing oil sprayer and mounting structure thereof on cylinder cover

Technical Field

The utility model relates to an automobile engine electricity injection system technical field, concretely relates to sprayer of making an uproar falls in damping and mounting structure on the cylinder cap thereof.

Background

The fuel electronic injection system is an important component of an engine, and the main function of the fuel electronic injection system is to provide fuel for the engine according to the requirements according to ECU control signals. With the development of automobile products, the multidimensional demand of the market on automobiles is also continuously promoted, and particularly direct subjective experiences such as NVH (noise, vibration and harshness) performance of products are more and more emphasized.

The direct injection (GDI) technology in the fuel cylinder leads the high-efficiency combustion system to bring great improvement to the dynamic property and the economical efficiency of the engine, and gradually becomes the mainstream technology of market application. However, GDI engines also face more complex NVH issues: the oil sprayer of the GDI engine is installed on a cylinder cover, the oil sprayer is connected with a cylinder cover through a metal gasket on the oil sprayer, when the oil sprayer works, an inner valve needle reciprocates up and down, mechanical vibration is brought to the oil sprayer and the cylinder cover through an oil sprayer valve seat, a shell and the cylinder cover, knocking sound is generated at the same time, and the vibration and noise level of the engine are influenced. And because the GDI engine generally adopts high-pressure injection, the valve needle of the oil injector is opened and closed at high frequency, so that the vibration and the noise are worse.

The traditional fuel injector gasket adopts a common metal gasket or a metal gasket with a simple vibration reduction structure, the metal gasket is tightly connected with a fuel injector and a cylinder cover after being compressed, and the vibration reduction buffering effect is realized through a fine convex structure contacted with a fuel injector shell, but the convex structure is easy to damage and has poor durability, the whole gasket is made of metal materials and is connected with the fuel injector metal shell and a cylinder cover metal boss, so that the vibration reduction effect is poor, and the noise reduction effect is avoided. Therefore, a structure containing a gasket is needed, which can improve the vibration reduction effect, reduce noise, and is durable and reliable.

Disclosure of Invention

The utility model aims at providing a sprayer of making an uproar and the mounting structure on the cylinder cap fall in the damping to the not enough of above-mentioned technique, it is good to fall the damping noise reduction effect, and durable reliable.

In order to achieve the purpose, the vibration-damping noise-reducing oil sprayer designed by the utility model comprises an oil sprayer main body and a needle valve arranged at the lower end of the oil sprayer main body, wherein an upper thrust piece is welded on the outer shell of the oil sprayer main body, a lower thrust piece is welded on the outer shell of the needle valve, an arc-shaped limiting groove is formed between the upper thrust piece and the lower thrust piece, a vibration-damping gasket is arranged in the arc-shaped limiting groove in a clearance fit manner, the vibration-damping gasket is in a hollow annular shape and is sleeved on the oil sprayer main body, the vibration-damping gasket sequentially comprises an upper structure, a middle structure and a lower structure from top to bottom, the diameter of the middle structure is larger than that of the lower structure, a plurality of triangular three-dimensional conical bulge structures are uniformly distributed on the outer surface of the middle structure, the triangular three-dimensional conical bulge structures are, the bottom of the lower structure is in contact with the lower thrust plate, and the upper thrust plate and the lower thrust plate are used for limiting the vibration reduction gasket up and down.

Preferably, the upper structure is an arch structure, and a contact surface between the vibration damping pad and the upper thrust plate is reduced.

Preferably, an annular groove concentric with the lower thrust plate is formed in the outer wall of the lower thrust plate, the height of the annular groove is 0.5-0.7 mm, a metal thrust ring is fixedly installed in the annular groove, and the bottom of the lower structure of the vibration damping gasket is in contact with the metal thrust ring.

Preferably, the metal thrust ring is a hollow ring in a pentagram shape, and plays a role in vibration damping and buffering.

Preferably, the number of the triangular three-dimensional conical protruding structures is four, and the four triangular three-dimensional conical protruding structures are uniformly distributed at an included angle of 90 degrees.

Preferably, the thickness of the upper thrust plate is 1.5-2.5 mm, and the thickness of the lower thrust plate is 1-2 mm.

The utility model provides a damping falls mounting structure of making an uproar sprayer on cylinder cap, the needle valve inserts downthehole on the cylinder cap, the lower surface of middle part structure supports the boss in hole on the cylinder cap realizes the downward spacing of sprayer main part, the protruding structure of the three-dimensional toper of triangle all supports the chamfer inclined plane in hole on the cylinder cap has reduced the sprayer main part with the contact surface in hole of cylinder cap.

Compared with the prior art, the utility model, have following advantage:

1. the contact area of the oil sprayer main body and the hole of the cylinder cover is reduced through the triangular three-dimensional conical protruding structure, and the vibration and noise reduction effects are improved;

2. the vibration reduction gasket is limited and fixed through the upper thrust plate, the lower thrust plate, the arc-shaped limiting groove and the metal thrust ring, and the tension gasket is buffered by combining the shape design of the metal thrust ring, so that the vibration reduction and noise reduction performance is further improved.

Drawings

FIG. 1 is a schematic structural view of the vibration-damping noise-reducing fuel injector of the present invention;

FIG. 2 is an enlarged view of a portion of the vibration dampening shim of FIG. 1;

fig. 3 is a schematic view of the assembly of the fuel injector on the cylinder head.

The components in the figures are numbered as follows:

the fuel injector comprises a fuel injector body 1, a needle valve 2, an upper thrust plate 3, a lower thrust plate 4, a damping gasket 5, an upper structure 6, a middle structure 7, a lower structure 8, a triangular three-dimensional conical convex structure 9, a metal thrust ring 10, a cylinder cover 11, a hole 12, a boss 13 and a chamfer inclined plane 14.

Detailed Description

The present invention will be described in further detail with reference to the following drawings and specific embodiments.

As shown in fig. 1 and fig. 2, the utility model discloses a vibration-damping noise-reducing fuel injector, including a fuel injector main body 1 and a needle valve 2 arranged at the lower end of the fuel injector main body 1, an upper thrust plate 3 is welded on the outer shell of the fuel injector main body 1, a lower thrust plate 4 is welded on the outer shell of the needle valve 2, an arc-shaped spacing groove is formed between the upper thrust plate 3 and the lower thrust plate 4, the arc-shaped spacing groove has arc transition from top to bottom, a vibration-damping gasket 5 is installed in the arc-shaped spacing groove in a clearance fit manner, the vibration-damping gasket 5 is in a hollow ring shape, the vibration-damping gasket 5 is sleeved on the fuel injector main body 1, the inner surface of the vibration-damping gasket 5 is contacted with the arc-shaped spacing groove, the whole vibration-damping gasket 5 can properly rock along the axial direction and the radial direction in the arc-shaped, the outer surface of the middle structure 7 is provided with four triangular three-dimensional conical protruding structures 9, the four triangular three-dimensional conical protruding structures 9 are uniformly distributed at an included angle of 90 degrees, and the triangular three-dimensional conical protruding structures 9 are located on the same horizontal plane.

In this embodiment, the upper structure 6 is an arch structure, the top of the upper structure 6 is in contact with the upper thrust plate 3, an annular groove concentric with the lower thrust plate 4 is formed in the outer wall of the lower thrust plate 4, the height of the annular groove is 0.6mm, a metal thrust ring 10 is fixedly installed in the annular groove, the metal thrust ring 10 is a hollow annular in a pentagram shape and has a vibration damping and buffering effect, and the bottom of the lower structure 8 of the vibration damping gasket 5 is in contact with the metal thrust ring 10.

In this embodiment, the thickness of the upper thrust plate 3 is 2mm, and the thickness of the lower thrust plate 4 is 1.5 mm.

In addition, in this embodiment, the damping gasket 5 is made of a non-metal composite material, and the damping gasket 5 is in contact with the metal surfaces of the metal shell of the injector body 1 and the cylinder head 11, so that compared with the contact between metal and metal, the damping gasket has better damping and noise reducing effects and better endurance reliability.

When the vibration-damping noise-reducing fuel injector is installed on a cylinder cover, as shown in fig. 3, the needle valve 2 is inserted into a hole 12 in the cylinder cover 11 until the lower surface of the middle structure 7 abuts against a boss 13 of the hole 12 in the cylinder cover 11, so that downward limiting of the fuel injector main body 1 is realized, and meanwhile, the triangular three-dimensional conical protruding structures 9 abut against chamfer inclined surfaces 14 of the hole 12 in the cylinder cover 11, so that contact surfaces of the fuel injector main body 1 and the hole 12 in the cylinder cover 11 are reduced, and vibration damping is realized.

When the oil sprayer works, a vibration signal is transmitted to the triangular three-dimensional conical convex structure 9 through the outer surface of the vibration reduction gasket 5 and then transmitted to the chamfer inclined surface 14 of the hole 12 on the cylinder cover 11, in the embodiment, the vibration reduction gasket 5 is made of a non-metal synthetic material, the natural frequency of the vibration reduction gasket is different from that of a metal material, the vibration reduction gasket has a good buffering effect on vibration, and the vibration signal is greatly attenuated after passing through the vibration reduction gasket 5; meanwhile, the contact area between the triangular three-dimensional conical convex structure 9 and the chamfer inclined surface 14 of the hole 12 on the cylinder cover 11 is small, so that the cylinder cover 11 receives less vibration, and the vibration transmission is further reduced.

Therefore, the outer shell of the vibration source of the fuel injector is not directly contacted with the surface of the cylinder cover 11, the vibration reduction effect is greatly achieved, and the solid medium transmission of the knocking sound of the needle valve 2 is also attenuated through the transmission of the path according to the same principle.

The utility model discloses damping and noise reduction fuel injector and mounting structure on the cylinder cover thereof, the contact area of the fuel injector main body 1 and the hole 12 on the cylinder cover 11 is reduced through the triangular three-dimensional conical bulge structure 9, and the damping and noise reduction effect is improved; the vibration damping gasket 5 is limited and fixed through the upper thrust plate 3, the lower thrust plate 4, the arc-shaped limiting groove and the metal thrust ring 10, and the vibration damping gasket 5 is buffered by combining the shape design of the metal thrust ring 10, so that the vibration damping and noise reduction performance is further improved; in addition, the vibration damping gasket 5 made of the non-metal composite material has a good buffering effect on vibration, greatly attenuates vibration signals and has better endurance reliability compared with the natural frequency of a metal material.

Claims

1. The utility model provides a sprayer of making an uproar falls in damping, includes sprayer main part (1) and establishes needle valve (2) of sprayer main part (1) lower extreme, its characterized in that: the fuel injector is characterized in that an upper thrust plate (3) is welded on the outer shell of the fuel injector main body (1), a lower thrust plate (4) is welded on the outer shell of the needle valve (2), an arc-shaped limiting groove is formed between the upper thrust plate (3) and the lower thrust plate (4), a vibration reduction gasket (5) is installed in the arc-shaped limiting groove in a clearance fit manner, the vibration reduction gasket (5) is in a hollow annular shape, the vibration reduction gasket (5) is sleeved on the fuel injector main body (1), the vibration reduction gasket (5) sequentially comprises an upper structure (6), a middle structure (7) and a lower structure (8) from top to bottom, the diameter of the middle structure (7) is larger than that of the lower structure (8), a plurality of triangular three-dimensional conical protruding structures (9) are uniformly distributed on the outer surface of the middle structure (7), and the triangular three-dimensional conical protruding structures (9, the top of the upper structure (6) is in contact with the upper thrust plate (3), and the bottom of the lower structure (8) is in contact with the lower thrust plate (4).

2. The vibration and noise reduction fuel injector of claim 1, wherein: the upper structure (6) is an arch structure.

3. The vibration and noise reduction fuel injector of claim 1, wherein: an annular groove which is concentric with the lower thrust plate (4) is formed in the outer wall of the lower thrust plate (4), the height of the annular groove is 0.5-0.7 mm, a metal thrust ring (10) is fixedly installed in the annular groove, and the bottom of a lower structure (8) of the vibration damping gasket (5) is in contact with the metal thrust ring (10).

4. The vibration and noise reduction fuel injector of claim 3, wherein: the metal thrust ring (10) is in a hollow ring shape in a pentagram shape.

5. The vibration and noise reduction fuel injector of claim 1, wherein: the number of the triangular three-dimensional conical protruding structures (9) is four, and the four triangular three-dimensional conical protruding structures (9) are uniformly distributed at an included angle of 90 degrees.

6. The vibration and noise reduction fuel injector of claim 1, wherein: the thickness of the upper thrust plate (3) is 1.5-2.5 mm, and the thickness of the lower thrust plate (4) is 1-2 mm.

7. A mounting structure of a vibration and noise reduction fuel injector according to any one of claims 1 to 6 on a cylinder cover is characterized in that: needle valve (2) insert in hole (12) on cylinder cap (11), the lower surface of middle part structure (7) supports boss (13) of hole (12) on cylinder cap (11), three-dimensional toper protruding structure of triangle (9) all support chamfer inclined plane (14) of hole (12) on cylinder cap (11).