KR100680303B1 - Damper for delivery pipe of fuel system of vehicle - Google Patents

Abstract

According to the present invention, the fuel pressure is uniformly applied to the entire surface of the plunger, thereby increasing the degree of attenuation of the remaining fuel pressure, and effectively coping with the pulsation, and at the same time, easy fracture and This is to prevent the occurrence of breakage in advance.

In the present invention for realizing this, in the damper for the distribution pipe of the vehicle fuel device which is installed at the distal end of the distribution pipe to which the fuel pressure suction pumped along the pipeline by the fuel pump from the fuel tank, the coupling with the injectors A housing portion having an integral press-fit end at the distal end of the distribution tube having a plurality of injector coupling ends for the purpose; A plurality of clamping ends extending to the distal end of the housing part; A side plate member which is hermetically coupled to the housing by such a plurality of clamping ends; A plunger embedded in a space formed by the housing part and the side plate member; A spring member provided between the plunger and the side plate member; A damper for a distribution pipe of a vehicle fuel device including a sealing member provided between an inner wall of the housing portion and a plunger is provided.

Fuel system, distribution pipe, delivery pipe, injector, pulsation

Description

Damper for delivery pipe of fuel system of vehicle

1 is a configuration perspective view for showing an application state to the damper for distribution pipe of the general vehicle fuel device,

2 is a partial perspective view of a detached state for showing an application state to a damper for distribution pipes of a conventional vehicle fuel device;

3 is a partial cross-sectional view of a detached state for showing the internal structure of another damper for distribution pipes of a conventional vehicle fuel device,

4 is a partial cross-sectional view of a separated state for showing the internal structure of the damper for distribution pipe of the vehicle fuel apparatus according to an embodiment of the present invention;

5 is a cross-sectional view showing an internal structure of a damper for a distribution pipe of a vehicle fuel device according to another embodiment of the present invention;

6 is a cross-sectional view illustrating an internal structure of a damper for a distribution pipe of a vehicle fuel device according to still another exemplary embodiment of the present invention.

<Description of Symbols for Main Parts of Drawings>

2: fuel tank 8: fuel pump

10: distribution pipe 12: injector

D: Damper 40: Press-fit end

42 housing 44 side plate

46: plunger 48: sealing member

50: spring

The present invention relates to a damper for a distribution pipe of a vehicle fuel device, and more particularly, to a damper for a distribution pipe damper of a vehicle fuel device to be able to absorb and relieve the residual pressure of the fuel present in the delivery pipe.

The fuel device of the vehicle is a system for continuously supplying the fuel injected into the combustion chamber of the engine in an appropriate amount according to the driving control degree of the engine, and as shown in FIGS. 1 and 2, the fuel pump 2 from the fuel tank 2. It is configured to distribute the fuel pumped intake along the pipeline by 8) to a plurality of injectors 12 installed in the combustion chamber of the engine and to be injected by the plurality of injectors 12.

In addition, a precipitator 4 and a fuel filter 6 may be installed on the conduit between the fuel tank 2 and the fuel pump 8 to allow precipitation and filtration of foreign matters.

In addition, the plurality of injectors 12 are provided with a delivery pipe 10 coupled to another fuel pipe 8 to the fuel pump 8, and configured to connect the fuel in the returnless system of fuel. 2, the damper 20 is installed at the distal end of the pipe 10 to attenuate the pulsation caused by the remaining fuel pressure, so that the amount of fuel injected by the plurality of injectors 12 can be uniformly controlled.

The uniformity of the injected fuel quantity influences the concentration of the mixer in the combustion chamber, and in turn, determines the rotational speed and output of the engine intended by the driver, and increases or decreases the combustion rate of the mixer, as well as affecting the occurrence of pulsation. At the same time, it affects whether the injector will be pulsated.

Therefore, a function of uniformly controlling the fuel pressure in the distribution pipe 10 is required, and for this purpose, the damper 20 as described above is required.

The damper 20 as described above usually couples the flange 18a to the distal end of the tubular body 13 having a plurality of injector coupling ends 14a to 14d, and the flange 18a and the bolt B and It is coupled to another flange 18b fastened by a nut N.

Reference numerals '16a' and '16b', which are not described in FIG. 2, refer to 'another flange' coupled to each other to connect the fuel supply pipe 22 to one end of the tubular body 13 of the distribution pipe 10. do.

On the other hand, Figure 3 is a damper 20 of the form in which the housing 23, 25 is coupled to form a flange portion that can be superimposed on each other in the form of a container is folded one of the flange portion to bite the other flange portion. ).

In addition, any one of the housings 23 and 25 is coupled to other fastening ends 35b and 35c which are screwed to the fastening end 35a of the distribution pipe 10, thereby distributing the distribution pipe 10. Fuel from the damper 20 can be introduced into the housing 23.

In addition, the diaphragm 27 is fixed between the housing 23 and the housing 25 of the damper 20, and the coil spring 28 holding the diaphragm 27 is embedded therein.

However, the damper for the distribution pipe of the conventional fuel device as described above is of the type in which the three pieces are combined with each other, thereby increasing the assembling process and increasing the assembling work time, thereby making the workability worse. The problem is that the productivity is also lowered.

In addition, a relatively higher fuel pressure is applied at a portion that is not supported by the coil spring, and even pressure is not applied at the entire region, thereby reducing the residual fuel pressure. There was a problem that can not effectively cope with the occurrence of pulsation.

In addition, the damper for the distribution pipe of the conventional fuel device can be easily broken the diaphragm, and in this case, the entire damper has to be replaced, resulting in a drawback of increasing the burden of cost.

The present invention has been made to solve the problems and disadvantages of the prior art as described above, the present invention is uniform fuel pressure on the entire surface of the plunger is provided to move in parallel with the oil state is maintained between the housing It is possible to increase the degree of attenuation of the residual fuel pressure, thereby effectively coping with the pulsation, and to prevent the occurrence of easy crushing and breakage at a certain part. As a result, it is possible not only to ensure a long service life, but also to form an integral press-fitted end with the distribution pipe, thereby reducing the number of parts and the number of processes according to fabrication and thereby greatly reducing the manufacturing cost. The purpose is to provide a damper for the distribution pipe of the device.

Other objects and advantages of the invention will be described below and will be appreciated by the embodiments of the invention. In addition, the objects and advantages of the present invention can be realized by means and combinations indicated in the claims.

In order to achieve the above object, the present invention provides an injector in a damper for a distribution pipe of a vehicle fuel device which is installed at the distal end of a distribution pipe in which a fuel pressure suction pumped along a pipeline by a fuel pump is applied. A housing portion having an integral press-in end at the distal end of the distribution tube having a plurality of injector coupling ends for coupling of the plurality of clamping ends, a plurality of clamping ends extending at the distal end of the housing part, and sealed by the plurality of clamping ends. A side plate member to be coupled, a plunger inherent in a space formed by the housing part and the side plate member, a spring member provided between the plunger and the side plate member, and provided between the inner wall and the plunger of the housing part. A damper for a distribution pipe of a vehicle fuel device having a sealing member is provided.

Said plunger is formed in the structure which extended the flange part which has a larger diameter on both sides of the intermediate end part.

The sealing member is constrained between the inner wall of the housing and the plunger by both flange portions of the plunger, the cross-section is made of an oval ring body.

The side plate member is formed in a plate shape, the plate spring cut and bent at the plate portion is integrally formed, and the diaphragm held by the plate spring is clamped between the side plate member and the housing portion, It may be provided.

The leaf spring may be one end of which is divided and curved.

The side plate member is formed in a plate shape, the plate spring cut and bent at the plate portion is integrally formed, the diaphragm is a flange form from the corrugated pipe portion and the corrugated pipe portion that can be stretched at the press-fit end side of the housing portion. It is made of a corrugated plate extending to the bite is fixed between the side plate member and the housing portion, it may be provided with a coil spring interposed between the flat plate and the plate spring blocking the corrugated pipe portion.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms or words used in the present specification and claims should not be construed as being limited to the ordinary or dictionary meanings, and the inventors should properly introduce the concept of terms to explain their own invention in the best way. Based on the principle that the definition can be made in a simple manner, it should be interpreted as meaning and concept corresponding to the technical idea of the present invention.

Therefore, the embodiments described in the specification and the drawings shown in the drawings are only the most preferred embodiments of the present invention and do not represent all of the technical idea of the present invention, various equivalents that may be substituted for them at the time of the present application It should be understood that there may be water and variations.

FIG. 1 is a perspective view illustrating an application state of a damper for a distribution pipe of a general vehicle fuel device, and FIG. 4 is a cross-sectional view illustrating an internal structure of a damper for a distribution pipe damper of a vehicle fuel device according to an exemplary embodiment of the present invention.

As shown, an embodiment of the present invention connects the fuel tank 2, the fuel pump 8, and the distribution pipe 10 with conduits, and connects the distribution pipe 10 with a plurality of injectors 12. In the vehicle fuel apparatus which is coupled, it relates to the damper (D) which is attached to the distal end of the distribution pipe (10).

That is, the fuel device of the vehicle distributes the fuel suction-pumped along the conduit by the fuel pump 8 from the fuel tank 2 as described above to the multiple injectors 12 installed in the combustion chamber of the engine, and thus the multiple fuels. It is configured to be sprayed by the injectors 12.

In addition, by installing a precipitator 4 and a fuel filter 6 on the pipeline between the fuel tank 2 and the fuel pump 8, the injector 12 may be configured to settle and filter foreign matters. The damper (D) is attached to the distal end of the distribution pipe (10) having a plurality of mounting ends (14a) (14d) for coupling with the ().

The damper (D) comprises a housing portion 42 and the press-fit end 40, the plunger 46 and the sealing member 48, the side plate member 44 and one coil spring (50).

That is, the press-fit end 40 of the housing 42, which is integrally formed through the drawing process, is press-fitted to the distal end of the distribution pipe 10 by force, and the plunger 46 is connected to the housing 42. It is built.

In addition, the sealing member 48 is interposed between the inner wall of the housing 42 and the plunger 46, and the outer peripheral portion of the end of the housing 42 is bent to form the clamping ends 43a and 43b at both ends. Let's do it. The side plate member 44 is provided so as to be bitten by the clamping ends 43a and 43b of both ends thus formed, and is formed by interposing one coil spring 50 between the side plate member 44 and the plunger 46. Do too.

The plunger 46 as described above may be formed in a structure in which a flange portion having a larger diameter is extended to both sides of the intermediate end thereof, and the sealing member 48 is formed by the amount of the plunger 46. Constrained between the inner wall of the housing 42 and the plunger 46 by the flange portion, the cross-sectional shape may be of an oval ring body.

5 is a cross-sectional view illustrating an internal structure of a damper for a distribution pipe of a vehicle fuel device according to another exemplary embodiment of the present invention.

As shown in the figure, the side plate member 44 is formed in a plate shape, and the leaf spring 50 cut and bent at the flat plate is integrally formed, and the leaf spring 50 has its end portion divided. In addition, the diaphragm 49, which is centrally supported by the leaf spring 50, may be bitten and fixed between the side plate member 44 and the housing part 42. .

Reference numerals '10', 'D', '14d', '42' 40 ',' 43a, b ', etc., which are not described in FIG. 5, are the same as in FIG. 4, such as' distribution pipe ',' damper ',' Mounting end ',' housing ',' pressing end 'and' clamping end 'respectively.

6 is a cross-sectional view illustrating an internal structure of a damper for a distribution pipe of a vehicle fuel device according to still another exemplary embodiment of the present invention.

As shown in the drawing, the side plate member 44 is formed in a plate shape, and a plate spring 50 cut and bent at the flat plate is integrally formed, and the diaphragm 49 is formed of the housing part 42. It consists of a corrugated pipe portion 47a that can be expanded and contracted at the press-fit end 40 side and a corrugated plate portion 46b extending in a flange form from the corrugated pipe portion 47a, so that the side plate member 44 and the housing portion 42 are formed. It may be fixed to the coil spring 51 which is interposed between the flat plate portion 45a and the leaf spring 44 to block the corrugated pipe portion 47a.

The diaphragm 49 as described above is the primary pressure-absorbing action by the fuel pressure in the corrugated pipe portion (47a), and the secondary pressure to mitigate the residual pressure in the corrugated pipe portion (47a).

Reference numeral '10', which is not described in FIG. 6, denotes a 'distribution pipe' as in FIGS. 4 and 5, and 'D' denotes a 'damper', and other non-reference numerals '43a' and '43b' denote the above. The 'clamping end' extending from the tip of the housing part 42, by folding one of the clamping end (43a) to bite the other clamping end (43a) to connect the side plate member 44 to the housing part 42 It is sealed.

In the present invention as described above, the residual pressure of the fuel present in the distribution pipe 10 is uniformly applied to the entire surface of the plunger 46, thereby causing the plunger 46 to overcome the elasticity of the spring 50 member. By being moved in parallel while being parallel, smooth reduction of residual fuel pressure and pulsation can be prevented.

At this time, the sealing member 48 maintains the state of tightness between the inner wall of the housing 42 and the plunger 46 and prevents easy breakage at any part by the action and structure. The risk of leakage can also be excluded.

The present invention as described above allows the fuel pressure to be uniformly applied to the entire surface of the plunger, which is provided to move in parallel with the housing in a state of oil tightness, thereby increasing the degree of reducing the residual fuel pressure. It provides the effect of being able to.

In addition, the present invention can effectively cope with the occurrence of pulsation, and at the same time, it is possible to prevent the occurrence of easy crushing and breakage at a certain portion, thereby providing another effect that it is possible to ensure a long life.

In addition, the present invention, by being able to sufficiently hold the plunger even with a single spring member to reduce the number of parts and the number of processes according to the assembly manufacturing, thereby providing a useful effect that can significantly reduce the manufacturing cost.

As described above, although the present invention has been described by means of a limited embodiment and drawings, the present invention is not limited to this, and the person skilled in the art to which the present invention belongs to Of course, various modifications and variations are possible within the scope of the appended claims.

Claims (6)

In the damper for distribution pipes of a vehicle fuel device provided at the distal end of the distribution pipe to which the fuel pressure pumped along the pipeline by the fuel pump from the fuel tank is applied, A housing portion having an integral press-in end at the distal end of the distribution tube having a plurality of injector coupling ends for coupling with the injectors; A plurality of clamping ends extending to the distal end of the housing part; A side plate member which is hermetically coupled to the housing by such a plurality of clamping ends; A plunger embedded in a space formed by the housing part and the side plate member; A spring member provided between the plunger and the side plate member; And a sealing member provided between the inner wall of the housing and the plunger. The method of claim 1, wherein the plunger is A damper for distribution pipe of a vehicle fuel device, characterized in that it is formed in a structure in which a flange portion having a larger diameter is extended to both sides of its intermediate end. The method of claim 1, wherein the sealing member, A damper for a distribution pipe damper for a vehicle fuel device, characterized in that it is constrained between the inner wall of the housing and the plunger by both flange portions of the plunger, the ring shape having an elliptical cross section. The method of claim 1, wherein the side plate member, It is formed in the shape of a plate, the plate spring cut off and bent at the plate portion is integrally formed, the diaphragm is carried by the plate spring between the side plate member and the housing portion is fixed, provided Damper for distribution pipe of vehicle fuel system. The method of claim 4, wherein the leaf spring, A damper for distribution pipe of a vehicular fuel device, characterized in that its end is divided and curved. The method of claim 1, wherein the side plate member, It is formed in the shape of a plate, the plate spring cut and bent at the plate portion is formed integrally, the diaphragm is a corrugated pipe portion that can be stretched at the press-fit end side of the housing portion and a corrugated plate portion extending in the form of a flange from the corrugated pipe portion And a coil spring interposed between the flat plate portion blocking the corrugated pipe portion and the leaf spring, the bit plate being fixed between the side plate member and the housing portion.

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