KR101073705B1 - Pulsation damper with one body type housing - Google Patents

Abstract

Disclosed is a housing integrated fuel pulsation reducer. The disclosed integrated fuel pulsation reducer includes: a retractable portion for reducing pulsation and a housing integrally formed to connect the retractable portion with the fuel pipe, the housing having a deep drawing in the direction of the fuel pipe in the retractable portion so that the volume is increased. The pulsation reduction portion to be molded is formed.

Fuel, pulsation, housing, deep drawing, telescopic

Description

Housing integrated fuel pulsation reducer {PULSATION DAMPER WITH ONE BODY TYPE HOUSING}

The present invention relates to a fuel pulsation reducer, and more particularly, to a housing-integrated fuel pulsation reducer in which the volume of the lower side of the stretchable portion is increased by an integrally formed housing to increase the damping effect.

In general, a fuel supply apparatus used in an automobile includes a fuel tank, a fuel pump for pumping fuel from the fuel tank, and a fuel transport pipe for transporting the fuel pumped from the fuel pump. And a fuel filter for removing impurities in the fuel is installed in the middle of the fuel transfer pipe.

Fuel introduced into the fuel pipe through the fuel delivery pipe is injected into each combustion chamber provided in the engine through the injector.

The pressure of the fuel passing through the fuel pipe is changed by driving the injector, driving the fuel pump, or the like, and a pulsation phenomenon occurs.

To reduce this pulsation, a pulsation reducer is installed in the fuel pipe.

The foregoing invention refers to the background of the art to which the present invention pertains, and does not mean the prior art.

Conventional pulsation reduction is made by combining the expansion and the fuel pipe is a combination of the housing (press) and the body of the cutting material to increase the weight of the production process and parts, plating after joining by the brazing method Because of this process, corrosion occurs under chemical or brine conditions. In addition, the damping effect is reduced because the volume below the stretchable portion has a condition that is disadvantageous for pulsation absorption. Therefore, there is a need for improvement.

The present invention is created by the necessity as described above, it is possible to prevent the production process increases and the weight of the parts increase by the combination of the housing and the body portion, and to use a material with a high corrosion resistance by integrating the housing and the body portion Able The object is to provide a housing integrated fuel pulsation reducer.

It is also an object of the present invention to provide a housing-integrated fuel pulsation reducer that can reduce fuel pulsation by increasing the volume below the stretchable portion.

A housing integrated fuel pulsation reducer according to the present invention includes: a flexible portion for reducing pulsation and a housing integrally formed to connect the flexible portion and the fuel pipe, and the housing is deeply drawn in the direction of the fuel pipe so that the volume is increased. (Deep Drawing) It is characterized in that the pulsation reduction portion is formed.

Moreover, it is preferable that this invention includes the stopper part shape | molded integrally with a housing, and supports the said extension part.

In addition, the side surface of the housing is preferably provided with a locking step for mounting the O-ring.

In addition, the housing is preferably further provided with a supporter member for preventing the separation of the O-ring.

In addition, the supporter member is preferably fixed to the end of the housing by spot welding.

In addition, it is preferable that a backup ring is further provided between the O-ring and the locking step.

The housing-integrated fuel pulsation reducer according to the present invention includes: an elastic portion for elastically supporting one side to reduce pulsation transmitted along the fuel pipe, and a pulsation bent in the fuel pipe direction at the stopper portion and the stopper for supporting the other side of the elastic portion. And a pulsation reduction portion forming a space to be delivered.

In addition, it is preferable that the stopper part and the pulsation reducing part are integrally formed in a housing that connects the elastic part and the fuel pipe.

In addition, the pulsation reduction portion is preferably provided with a first through-hole communicating with the fuel pipe, and the stopper portion with a second through-hole communicating with the fuel pipe.

Since the housing integrated fuel pulsation reducer according to the present invention is integrally molded with the housing connecting the expansion and contraction fuel pipes, the production process is reduced and the production cost is reduced, and the weight of the parts can be reduced to reduce the weight of the parts.

In addition, in the present invention, the area where the fuel is in contact with the center portion of the stretchable portion and the edge portion where the volume is expanded is increased, and the damping effect can be increased because the pulsation reduction portion is formed under the stretchable portion.

Hereinafter, with reference to the accompanying drawings will be described an embodiment of a housing integrated fuel pulsation reducer according to the present invention. For convenience of description, the housing-integrated fuel pulsation reducer used in the fuel supply device of the vehicle will be described as an example. In this process, the thickness of the lines or the size of the components shown in the drawings may be exaggerated for clarity and convenience of description. In addition, the terms described below are defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator. Therefore, definitions of these terms should be made based on the contents throughout the specification.

1 is an exploded perspective view schematically showing a housing integrated fuel pulsation reducer according to an embodiment of the present invention, Figure 2 is a perspective view showing a state in which the housing integrated fuel pulsation reducer shown in Figure 1 is coupled, Figure 3 2 is a side cross-sectional view of the housing-integrated fuel pulsation reducer shown in FIG. 2, FIG. 4 is a side cross-sectional view showing an installation state of the housing-integrated fuel pulsation reducer according to an embodiment of the present invention, and FIG. Side sectional view showing a state in which a backup ring is installed in the housing-integrated fuel pulsation reducer shown.

1 to 5, the housing integrated fuel pulsation reducer 1 according to an embodiment of the present invention, the expansion and contraction unit 10 and integrally formed to expand and contract the pulsation of the fuel 10 ) And a housing 40 for connecting the fuel pipe 70, and the housing 40 has a pulsation reduction formed by deep drawing in the direction of the fuel pipe 70 from the expansion and contraction portion 10 to increase the volume. It is characterized in that the portion 44 is formed.

The stretchable portion 10 is elastically supported on one side and stretched in the up and down direction (hereinafter, based on FIG. 3) to reduce pulsations transmitted through the fuel pipe 70.

The expansion and contraction unit 10 may be used in a variety of parts in the technical idea of stretching to absorb the pulsating wave delivered along the fuel. The stretchable part 10 according to an embodiment of the present invention is used by overlapping two diaphragms.

A retainer 12 supporting the lower end of the spring 24 is installed above the expansion and contraction portion 10. The fixing member 14 penetrates the center of the expansion and contraction unit 10 and the center of the retainer 12, and the expansion and contraction unit 10 and the retainer 12 are fixed and moved integrally by the fixing member 14. .

The case 20 forms an upper shape of the housing integrated fuel pulsation reducer 1, and the upper end of the spring 24 is mounted in contact with the inside of the case 20.

The upper portion of the case 20 is equipped with a rubber valve 22 serves to prevent external leakage of the fuel leakage caused by the tearing, etc. that can occur in the expansion and contraction portion 10 second.

The upper part of the housing 40 is installed to surround the edge of the elastic part 10, and a ring-shaped washer 32 is mounted between the elastic part 10 and the upper part of the housing 40.

In addition, a packing 30 is provided between the washer 32 and the case 20 to provide a sealing effect.

The housing 40 provided below the stretchable portion 10 forms an outer shape by press molding including a deep drawing process.

Deep drawing molding is formed so that the shape of the workpiece is long by the press working.

A pulsation reduction portion 44 extending from the housing 40 is provided below the stretchable portion 10 to form a space in which fuel for transmitting pulsation stays.

In addition, the stopper part 46 supporting the other side of the stretchable part 10 (the lower side of FIG. 3) is integrally formed with the housing 40, and has a shape bent upward from the lower center of the housing 40.

The stopper part 46 supports the lower side of the fixing member 14, and a second through hole 47 is formed in the center of the stopper part 46 to move fuel.

The pulsation reducing portion 44 is bent in the direction of the fuel pipe 70 from the stopper portion 46 to form a space in which the pulsation is transmitted. The stopper portion 46 supports the central portion of the stretchable portion 10, and a pulsation reducing portion 44 is formed around the stopper portion 46 to transmit pulsations to the edge portion of the stretchable portion 10.

The stopper part 46 and the pulsation reducing part 44 are integrally formed in the housing 40 connecting the expansion and contraction part 10 and the fuel pipe 70 to reduce the weight of the parts and shorten the work process.

The pulsation reduction portion 44 is provided with a first through hole 45 in communication with the fuel pipe 70 so that the pulsation is transmitted from the fuel pipe 70 to the expansion and contraction portion 10, and the stopper portion 46 has a fuel pipe. A second through hole 47 in communication with 70 is provided.

On the side of the housing 40 is provided a locking jaw portion 42 to which the O-ring 50 as a sealing member is mounted. The locking jaw portion 42 is formed in a shape bent at the side of the housing 40 so that one side of the O-ring 50 is engaged.

The housing 40 may be deformed into various shapes within the technical concept for gripping the stretchable portion 10 and being coupled to the fuel pipe 70. The housing 40 according to an embodiment of the present invention may be pressed. Or molded integrally by injection molding or the like, thereby reducing the weight of the housing 40.

As shown in FIG. 5, when the system pressure of the fuel pipe 70 in which the housing-integrated fuel pulsation reducer 1 is installed is high pressure, high-pressure fuel is released between the housing 40 and the fuel pipe 70. To prevent and prevent the rolling of the O-ring 50, a backup ring 52 is installed between the O-ring 50 and the locking jaw portion 42.

And, one end of the housing 40 is provided with a supporter member 60 to prevent the separation of the O-ring 50.

The upper side of the O-ring 50 is provided with a locking jaw portion 42 or a backup ring 52 to restrain the upward movement of the O-ring 50, the lower side of the O-ring 50 is provided with a bent portion of the fuel pipe 70 Alternatively, the supporter member 60, which is a separate member, is fixed to the lower side of the housing 40 to constrain the lower movement of the O-ring 50.

The supporter member 60 may protrude to the side of the housing 40 and a member of various shapes may be used in the technical concept for restraining the downward movement of the O-ring 50.

As shown in FIG. 1 and FIG. 3, the supporter member 60 is formed to have a ring shape and is supported by the supporter member 60 so as to be caught in the first through-hole 45 having a long hole shape provided in the lower portion of the housing 40. The bending protrusion 62 is formed to be bent upward.

Since the bending protrusion 62 is rotated while being inserted into the first through hole 45, the supporter member 60 is fixed to the lower side of the housing 40.

Alternatively, the supporter member 60 is formed in a disc shape in which a stainless material is processed by pressing, and is fixed by spot welding to one end of the housing 40.

As shown in FIG. 4, a housing integrated fuel pulsation reducer 1 is coupled to one side of a fuel pipe 70 for supplying fuel of an automobile to reduce pulsations moving along the fuel pipe 70.

The locking jaw portion 42 of the housing 40 restrains the upper side (hereinafter, reference to FIG. 4) of the O-ring 50. Then, the fuel pipe 70 is bent in a shape surrounding the lower portion of the O-ring 50 to restrain the downward movement of the O-ring 50.

Hereinafter, with reference to the accompanying drawings will be described in detail the operating state of the housing integrated fuel pulsation reducer 1 according to an embodiment of the present invention.

The pulsation transmitted to the housing integrated fuel pulsation reducer 1 along the fuel pipe 70 is transmitted to the expansion and contraction portion 10 through the first through hole 45 and the second through hole 47.

The elastic part 10 and the fixing member 14 are moved upward by the pulsation to absorb the pulsation, and the elastic part 10 and the fixing member 14 are moved to the original position by the spring 24.

The fixing member 14 is moved downward by being pushed by the spring 24, but is stopped by the stopper part 46 formed integrally with the housing 40.

Due to the pulsation reduction portion 44 provided below the expansion and contraction portion 10, the edge portion of the expansion and contraction portion 10, which is not in communication with the fuel pipe 70, communicates with the fuel pipe 70 and the fuel stays therein. To form. Therefore, the volume of the lower space of the expansion and contraction portion 10 is increased compared to the conventional, the damping effect is increased.

In addition, since the pulsation is transmitted to the expansion and contraction portion 10 through the first through hole 45 and the second through hole 47, the pulsation flowing along the fuel is transmitted to the center and the edge portion of the expansion and contraction portion 10. Therefore, the pulsation supplied along the fuel pipe 70 is more easily reduced in the expansion and contraction section 10.

Although the present invention has been described with reference to the embodiments shown in the drawings, this is merely exemplary, and those skilled in the art to which the art belongs can make various modifications and other equivalent embodiments therefrom. I will understand.

In addition, the housing-integrated fuel pulsation reducer (1) used in the fuel supply device used for automobiles has been described as an example, but this is merely illustrative, and the housing-integrated body of the present invention is also applied to other devices for reducing the pulsation phenomenon in addition to the automobile. The fuel pulsation reducer 1 can be used.

Therefore, the true technical protection scope of the present invention will be defined by the claims.

1 is an exploded perspective view schematically showing a housing integrated fuel pulsation reducer according to an embodiment of the present invention.

FIG. 2 is a perspective view illustrating a state in which the housing integrated fuel pulsation reducer illustrated in FIG. 1 is coupled.

3 is a side cross-sectional view of the housing integrated fuel pulsation reducer shown in FIG. 2.

Figure 4 is a side cross-sectional view showing the installation state of the housing integrated fuel pulsation reducer according to an embodiment of the present invention.

5 is a side cross-sectional view illustrating a state in which a backup ring is installed in the housing-integrated fuel pulsation reducer illustrated in FIG. 4.

<Description of Symbols for Main Parts of Drawings>

1: housing integrated fuel pulsation reducer

10: stretchable portion 14: fixing member

20: case 24: spring

40: housing 42: locking jaw

44: pulsation reduction portion 45: the first through

46: stopper portion 47: the second via

50: O-ring 52: backup ring

60: supporter member 70: fuel pipe

Claims (9)

delete delete delete delete delete delete One side is elastically supported and stretched to reduce the pulsation transmitted along the fuel pipe (70) (10); A stopper part 46 supporting the other side of the stretchable part 10; And A pulsation reduction portion 44 which is bent from the stopper portion 46 toward the fuel pipe 70 to form a space in which pulsation is transmitted, The stopper part 46 and the pulsation reducing part 44 are integrally molded to a housing 40 that connects the expansion and contraction part 10 and the fuel pipe 70. . delete The method of claim 7, wherein The pulsation reduction portion 44 is provided with a first through-hole 45 in communication with the fuel pipe 70, and the stopper portion 46 has a second through-hole 47 in communication with the fuel pipe 70. Housing integrated fuel pulsation reducer, characterized in that provided.

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