CN209875352U - Fuel metering valve adopting circumferential riveting structure - Google Patents

Abstract

The utility model discloses an adopt circumference riveted structure's fuel metering valve, including spring holder and shell, the inside of shell is provided with coil pack, the magnetism proof cover has been cup jointed to coil pack's inside, the inside of magnetism proof cover is provided with the bush, armature has been cup jointed to the inside of bush, the dog has been cup jointed in the left end port of armature, the left side opening of shell is provided with the connection piece, the left side of connection piece is provided with the valve barrel, the case has been inserted in the inside slip of valve barrel, the left end of valve barrel is provided with the spring holder. The utility model discloses this fuel metering valve's proportion electro-magnet part changes original two point type riveted structure into whole circumference riveting, and the riveting area is more than 5 times of former design, promotes the riveting intensity and the reliability of product.

Description

Fuel metering valve adopting circumferential riveting structure

Technical Field

The utility model relates to a fuel metering valve technical field specifically is an adopt fuel metering valve of circumference riveted structure.

Background

The fuel metering valve of the diesel high-pressure common rail system is used for a diesel engine high-pressure common rail system, is arranged on a high-pressure fuel pump, and regulates the fuel suction amount of the high-pressure fuel pump according to an engine ECU control signal so as to control the pressure of the high-pressure common rail system.

The riveting of the shell of the proportional electromagnet part of the similar foreign products adopts a two-point structure, and the riveting loosening of about 5 percent of the products is found in the process of domestic batch production, so that the electromagnetic characteristics of the products are changed, the flow characteristics of an electromagnetic valve assembly are influenced, the power attenuation of an engine and the standard exceeding of NOX and CH in emission are caused, and the complaint of users is caused.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an adopt circumference riveted structure's fuel metering valve to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides an adopt circumference riveted structure's fuel metering valve, includes spring holder and shell, the inside of shell is provided with coil pack, the magnetism proof cover has been cup jointed to coil pack's inside, the inside of magnetism proof cover is provided with the bush, armature has been cup jointed to the inside of bush, the dog has been cup jointed in the left end port of armature, the left side opening of shell is provided with the connection piece, the left side of connection piece is provided with the valve barrel, the inside slip of valve barrel has been inserted and has been put the case, the left end of valve barrel is provided with the spring holder.

Preferably, the spring seat is pressed into the left end port of the valve sleeve through interference, a spring is arranged between the spring seat and the valve core, the left end of the spring is connected with the spring seat, and the right end of the spring is in contact with the valve core.

Preferably, the right end of the valve core is in contact with the left end of the stop block.

Preferably, a third sealing ring is arranged between the right end of the coil assembly and the inner wall of the shell, and a gasket is arranged between the left side of the coil assembly and the inner wall of the left end of the shell.

Preferably, the right end of the valve sleeve penetrates through a middle inner hole of the connecting piece and is nested in the left opening of the shell, a first outer circular groove and a second outer circular groove are sequentially arranged on the outer surface of the valve sleeve from left to right, a first sealing ring of an annular structure is embedded in the first outer circular groove, and a second sealing ring of an annular structure is embedded in the second outer circular groove.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model discloses this fuel metering valve's proportion electro-magnet part changes original two point type riveted structure into whole circumference riveting, and the riveting area is more than 5 times of former design, promotes the riveting intensity and the reliability of product.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a right side schematic structure diagram of the present invention.

In the figure: 1. spring seat, 2, spring, 3, first sealing ring, 4, first excircle groove, 5, second sealing ring, 6, valve core, 7, connecting piece, 8, gasket, 9, shell, 10, coil pack, 11, dog, 12, armature, 13, bush, 14, magnetism isolating sleeve, 15, third sealing ring, 16, valve housing, 17, second excircle groove.

Detailed Description

In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the present invention is further described below with reference to the following embodiments.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element to which the reference is made must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, and for example, "connected" may be either fixedly connected or detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-2, the present invention provides an embodiment: a fuel metering valve adopting a circumferential riveting structure comprises a spring seat 1 and a shell 9, a coil assembly 10 is arranged inside the shell 9, a third sealing ring 15 is arranged between the right end of the coil assembly 10 and the inner wall of the shell 9, a gasket 8 is arranged between the left side of the coil assembly 10 and the inner wall of the left end of the shell 9, the sealing performance is good, a magnetic isolation sleeve 14 is sleeved inside the coil assembly 10, a lining 13 is arranged inside the magnetic isolation sleeve 14, an armature 12 is sleeved inside the lining 13, a stop dog 11 is sleeved inside the left end port of the armature 12, a connecting sheet 7 is arranged at the left side opening of the shell 9, a valve sleeve 16 is arranged at the left side of the connecting sheet 7, the right end of the valve sleeve 16 penetrates through a middle inner hole of the connecting sheet 7 to be nested in the left side opening of the shell 9, a first outer circular groove 4 and a second outer circular groove 17 are sequentially arranged on the outer surface of the valve sleeve 16 from left, the second sealing ring 5 of annular structure is set in the second outer circular groove 17, the sealing performance is improved, the valve core 6 is inserted in the valve sleeve 16 in a sliding mode, the right end of the valve core 6 is in contact with the left end of the stop block 11, the armature 12 can push the valve core 6 to move through the stop block 11, the left end of the valve sleeve 16 is provided with the spring seat 1, the spring seat 1 is pressed into the left end port of the valve sleeve (16) through interference, the connection is stable, a spring 2 is arranged between the spring seat 1 and the valve core 6, the left end of the spring 2 is in joint with the spring seat 1, the right end of the spring 2 is in contact with the valve core 6, and the valve core 6 can be.

The working principle is as follows: the utility model discloses when using, it is right to need the utility model discloses carry out simple structure understanding, high pressure common rail system low pressure fuel passes through inside the 16 tip inflow valves of valve barrel, flow out high-pressure oil pump inlet end through the valve port again, the valve port aperture is according to engine high pressure common rail system electronic control unit receiving speed sensor, engine speed sensor, water temperature sensor, signal such as rail pressure sensor, compare MAP and carry out the proportion electro-magnet input current's that the pulse width modulation ripples output controlled fuel metering valve size, control about armature 12 and dog 11, cooperation spring 2 realizes that the case 6 is removed and is adjusted the opening width of fuel metering valve, thereby control high-pressure oil pump's oil inlet capacity, reach the purpose of controlling high pressure common rail system rail pressure.

The above description is only an example of the present invention, and the common general knowledge of the known specific structures and characteristics of the embodiments is not described herein. It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (5)

1. The utility model provides an adopt fuel metering valve of circumference riveted structure, includes spring holder (1) and shell (9), its characterized in that: the utility model discloses a valve core, including shell (9), the inside of shell (9) is provided with coil pack (10), magnetic shield sleeve (14) have been cup jointed to the inside of coil pack (10), the inside of magnetic shield sleeve (14) is provided with bush (13), armature (12) have been cup jointed to the inside of bush (13), dog (11) have been cup jointed in the left end port of armature (12), the left side opening of shell (9) is provided with connection piece (7), the left side of connection piece (7) is provided with valve barrel (16), the inside slip of valve barrel (16) is inserted and is put case (6), the left end of valve barrel (16) is provided with spring holder (1).

2. A fuel metering valve as set forth in claim 1 in a circumferentially riveted configuration wherein: the valve is characterized in that the spring seat (1) is pressed into a left end port of the valve sleeve (16) through interference, a spring (2) is arranged between the spring seat (1) and the valve core (6), the left end of the spring (2) is connected with the spring seat (1), and the right end of the spring (2) is in contact with the valve core (6).

3. A fuel metering valve as set forth in claim 1 in a circumferentially riveted configuration wherein: the right end of the valve core (6) is contacted with the left end of the stop block (11).

4. A fuel metering valve as set forth in claim 1 in a circumferentially riveted configuration wherein: a third sealing ring (15) is arranged between the right end of the coil assembly (10) and the inner wall of the shell (9), and a gasket (8) is arranged between the left side of the coil assembly (10) and the inner wall of the left end of the shell (9).

5. A fuel metering valve as set forth in claim 1 in a circumferentially riveted configuration wherein: the right-hand member of valve barrel (16) passes the middle part hole nestification of connection piece (7) in the left side opening of shell (9), the surface of valve barrel (16) has set gradually first excircle groove (4) and second excircle groove (17) from left to right, the inside of first excircle groove (4) is inlayed and is put first sealing washer (3) of loop configuration, the inside of second excircle groove (17) is inlayed and is put second sealing washer (5) of loop configuration.