KR100773382B1 - Fuel pressure regulator for automobile using guide valve - Google Patents

Abstract

A pressure regulator for an automobile using a guide valve is provided to reduce manufacturing costs, and to improve residual pressure maintaining characteristics using a valve assembly of rubber material by replacing a conventional diaphragm assembly with the guide valve and a valve assembly. A pressure regulator for an automobile using a guide valve comprises an upper end cover(10), a guide valve(30), a valve assembly(40) and a lower end cover(20). The upper end cover includes a return hole(11) for returning fuel(60) drilled in a circumferential surface, one side having gradually curved shape, and the other side forming a plurality of step ridges(12). The guide valve is coupled to an inner side of the upper end cover, has one end provided with a plurality of a fixing members and forms a locking ridge(32) coupled to the inner side of the step ridges of the upper end cover. The valve assembly is coupled to the inside of the guide valve, provided with a circular spring fixing groove(41) in a length direction so that other side of a spring(50) is elastically supported and fixed, and moved up and down in a length direction of the guide valve. The lower end cover is coupled to a lower surface of the valve assembly, and provided with an inflow hole(21) penetrating the middle so that fuel is firstly flowed in.

Description

FUEL PRESSURE REGULATOR FOR AUTOMOBILE USING GUIDE VALVE}

1 is a cross-sectional view showing the configuration of a fuel pressure regulator for a vehicle according to the prior art.

Figure 2 is a perspective view showing a fuel pressure regulator for a vehicle using a guide valve according to the present invention.

3 is a plan view showing a fuel pressure regulator for a vehicle using a guide valve according to the present invention.

4 is a cross-sectional view taken along the line A-A of FIG.

5 is a partial cutaway view showing the configuration of a fuel pressure regulator for a vehicle using a guide valve according to the present invention.

Figure 6 is a perspective view showing the top cover of the fuel pressure regulator for a vehicle using a guide valve according to the present invention.

Figure 7 is a perspective view showing a guide valve of the fuel pressure regulator for a vehicle using a guide valve according to the present invention.

8 is a perspective view showing a valve assembly of a fuel pressure regulator for a vehicle using a guide valve according to the present invention.

Figure 9 is a perspective view showing a lower cover of the fuel pressure regulator for a vehicle using a guide valve according to the present invention.

<Description of the symbols for the main parts of the drawings>

10: top cover 11: return hole

12, 22: step 20: lower cover

21: inlet hole 23: O-ring

24: coupling portion 30: guide valve

31: rib 32: jamming jaw

33: micro clearance 34: fixing member

35: body 40: valve assembly

41: spring fixing groove 42: coupling groove

43: pinch protection part 50: spring

The present invention relates to a fuel pressure regulator for a vehicle using a guide valve, and more particularly, is integrally mounted to a fuel pump module to apply a diaphragm to maintain a constant fuel pressure when the fuel discharged from the pump is transferred to the engine. In the existing way of centering seat valves and ball valves and maintaining airtightness of the fuel chamber, the diaphragm can be held in place of the diaphragm, allowing the center of the valve assembly and the bottom cover to move up and down smoothly. The present invention relates to a fuel pressure regulator for an automobile using a guide valve for reducing costs and simplifying a process through the application of a guide valve capable of eliminating single-units.

The fuel supply system of a vehicle serves to supply fuel required by the engine to a carburetor or a fuel injection device according to the operating state of the engine, which is a fuel tank for storing fuel and a fuel pump for transporting fuel in the fuel tank. And a fuel supply pipe for supplying fuel supplied from the fuel tank to the combustion chamber. Briefly describing the configuration of the fuel tank, the fuel tank fixed to the vehicle body by the bracket is provided with a fuel gauge for measuring the remaining amount of fuel, and a partition is installed to prevent the fuel from being pushed to one side while driving on the curve. It is. A fuel injection hose is connected to the fuel pipe attached to the fuel tank by a clamp, and a fuel injection tube is inserted into the other end of the fuel injection hose. In addition, the fuel injection tube is provided with a breather pipe to prevent the negative pressure is formed inside the fuel tank.

The diaphragm assembly (DIAPHRAGM ASS'Y) of the conventional fuel pressure regulator consists of an upper shell (SHELL_UPR), a diaphragm (DIAPHRAGM), a lower shell (SHELL_LWR), a ball valve (BALL_VALVE), and a retainer (RETAINER). Fuel flows in from the bottom to the U-shape and passes through the center Seat_Valve and exits to the bottom.

1 is a cross-sectional view showing the configuration of a conventional fuel pressure regulator for a vehicle. Referring to FIG. 1, a fuel pump (not shown) for pressurizing fuel at a predetermined pressure is provided inside a fuel tank (not shown), and one side of the fuel pump removes moisture, dust, and the like contained in the fuel. A fuel filter (not shown) is provided. One side of the fuel filter is provided with a fuel pressure regulator 100 that can maintain a constant pressure at all times by returning a portion of the fuel to the fuel tank when the pressure of the fuel is higher than the set pressure. The fuel passing through the fuel pump, the fuel filter, and the fuel pressure regulator 100 is transferred to the engine through the fuel line. Referring to the configuration of the fuel pressure regulator 100, an inlet hole 107 through which the fuel is introduced through the fuel filter is formed on one side, and the diaphragm assembly 101 elastically supported on one side by the spring 105 on the other side. ) Is provided. The elastic modulus of the spring 105 is formed equal to the fuel set pressure. A ball valve 104 is provided at the lower end of the diaphragm assembly 101, and an outlet hole 108 for returning fuel to the fuel tank is formed at an upper end portion provided with the ball valve 104.

The fuel passed through the fuel filter is introduced into the fuel pressure regulator 100 through the inlet hole 107. At this time, when the pressure of the fuel is higher than the set pressure, the diaphragm assembly 101 moves to one side due to the pressure of the fuel. do. As the diaphragm assembly 101 is moved to one side due to the pressure of the fuel, the spring 105 elastically supporting the diaphragm assembly 101 to one side has a compressed state. As the diaphragm assembly 101 is moved to one side, a part of the fuel is transferred to the fuel tank through the outlet hole 108 as the ball valve 104 provided at the bottom of the diaphragm assembly 101 is moved upward.

The present invention has been made to solve the above problems, an object of the present invention is to simplify the structure and process by replacing the existing diaphragm assembly consisting of a number of parts with a valve assembly applied with a guide valve and rubber material, It is to provide a fuel pressure regulator for automobiles using guide valves that can secure equivalent performance to mass-produced products.

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

The present invention has the following features to achieve the above object.

One embodiment according to the present invention is a fuel pressure regulator for maintaining a constant fuel pressure by returning the fuel to the tank when the pressure of the fuel flowing into the inner than the set pressure, the return hole in which the fuel is returned to the circumferential surface A perforated side having a shape in which the diameter gradually curves toward the center of one end so that one side of the spring inserted therein is smoothly supported, and the other side of the top cover gradually increases in diameter and forms a plurality of stepped jaws; Correspondingly coupled to the inner side of the upper cover, a plurality of fixing members are formed at one end to be spaced apart and extend from one end, protrude ribs in the longitudinal direction from the inside of the fixing member to prevent shaking in the interior and the A guide valve to be press-fitted to the top cover and to increase the diameter of the other end stepwise to form a locking step corresponding to the inside of the step of the top cover; Is coupled to the inside of the guide valve, the other side of the spring is formed in the annular spring fixing groove which is dug in the longitudinal direction so that it can be fixed and fixed, forming a micro gap between the contact surface with the guide valve to return the fuel And valve assembly which is moved up and down in the longitudinal direction of the guide valve; Correspondingly coupled to the bottom surface of the valve assembly, the diameter is gradually reduced to form a plurality of stepped toward the bottom, the O-ring is fitted to the outer circumferential surface formed with the stepped, the lower end is formed through the center so that the fuel can be initially introduced cover; Characterized in that comprises a.

In addition, the valve assembly forms a coupling groove into which the coupling portion protruding from the upper surface of the lower cover does not interfere with the flow of the fuel flowing from the inlet hole, but is heat and chemical resistant to ensure airtightness with the lower cover. Characterized in that the pinch prevention portion is selected, the material of the strong FKM system.

In addition, the fuel flowing in the fuel pressure regulator for the vehicle using the guide valve according to the present invention is first introduced into the inlet hole of the lower cover, when the pressure of the fuel introduced than the set pressure is higher than the compression pressure of the spring due to the fuel pressure After lifting the valve assembly, it is returned through the return hole of the top cover passing through the micro clearance of the guide valve and the valve assembly.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, the terms or words used in this specification and claims should not be construed as being limited to the ordinary or dictionary meanings, and the inventors should properly explain the concept of terms in order to best explain their own invention. Based on the principle that can be defined, 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 embodiment of the present invention and do not represent all of the technical idea of the present invention, various modifications that can be replaced at the time of the present application It should be understood that there may be equivalents and variations.

Hereinafter, a fuel pressure regulator for an automobile using a guide valve according to an exemplary embodiment of the present invention will be described in detail with reference to FIGS. 1 to 9.

As shown in the drawing, the existing diaphragm assembly is replaced with the guide valve 30 and the rubber valve assembly 40 so that the pressure of the fuel 60 introduced into the lower cover 20 is higher than the set pressure. The fuel pressure regulator simplifies the structure and the process by lifting the assembly 40 and returning it through the top cover 10 through the microgap 33 formed by the guide valve 30 and the valve assembly 40. Regarding, the top cover 10, the bottom cover 20, and includes a guide valve 30, the valve assembly 40.

2 is a perspective view showing a fuel pressure regulator for an automobile using a guide valve according to the present invention. As shown in the drawing, the fuel 60 constitutes a fuel pressure regulator 70 for an automobile using the guide valve according to the present invention. Is first introduced from the bottom of the lower cover 20 is configured to return to the side of the top cover (10).

3 is a plan view showing a fuel pressure regulator for a vehicle using a guide valve according to the present invention, Figure 4 is a cross-sectional view taken along the line A-A of FIG.

5 is a partial cutaway view showing the configuration of a fuel pressure regulator for a vehicle using a guide valve according to the present invention, the upper cover 10 and the lower cover 20 is coupled as shown in the same guide according to the present invention The housing of the fuel pressure regulator 70 for automobiles using a valve is comprised.

The upper cover 10 and the lower cover 20 are formed with corresponding steps 12 and 22, respectively, and outside the step 22 of the lower cover 20 inside the step 12 of the top cover 10. Are abutted and joined.

O-ring 23 is fitted to the outside of the step (22) of the lower cover 20, the lower cover 20 is formed by the inlet hole 21 penetrating through the center, the fuel (60) first inside It is intended to be introduced.

The guide valve 30 is coupled to the inside of the upper cover 10 and the lower cover 20. The guide valve 30 has a predetermined thickness and a plurality of fixing members 34 extending in the longitudinal direction to one end of the body portion 35 penetrated therein are formed at regular intervals.

The inner side of the fixing member 34 and the inner circumferential surface of the body portion 35 protrudes a plurality of ribs 31 in the longitudinal direction to be forced between the valve assembly 40 and the top cover 10, thereby to It is structured to prevent shaking. In addition, the body portion 35 has a stepped end and the diameter thereof is increased to form a locking step 32. The locking step 32 is to be caught inside the step 12 of the top cover.

That is, the guide valve 30 is fitted into the upper cover 10, the lower cover 20 is coupled to the upper cover 10 while supporting the other end of the guide valve 30, The lower cover 20 also has a shape in which one side is fitted into the upper cover 10.

The guide valve 30 is applied to a material of PPS (Polyphenylene Sulfide) system to ensure fuel resistance and strength, the material can be selected by the user different.

The valve assembly 40 corresponds to the inner side of the guide valve 30 and is coupled to the inside thereof. At this time, the indentation state is maintained due to the plurality of ribs 31 protruding from the inner circumferential surface of the guide valve 30. It is a firm fixed bond that does not shake at. The valve assembly 40 forms an annular spring fixing groove 41 which is dug inwardly. The spring 50 is inserted in the longitudinal direction corresponding to the spring fixing groove 41, and the other side of the spring 50 contacts the inner upper end of the upper cover 10.

In other words, the valve assembly 40 is elastically supported by a spring 50 located inside one side of the fuel pressure regulator for a vehicle to which the guide valve 30 according to the present invention is applied.

The inner circumferential surface of the guide valve 30 and the outer circumferential surface of the valve assembly 40 are opposed to each other to form a microgap 33, and the fuel introduced into the lower cover 20 through the microgap 33 ( 60 is returned to the return hole 11 of the top cover 10.

As described above, the minute gap 33 is formed between the outer circumferential surface of the valve assembly 40 and the inner circumferential surface of the guide valve 30 due to the plurality of ribs 31 protruding from the inner circumferential surface of the guide valve 30. will be.

At the lower end of the valve assembly 40, a pinch prevention part 43 made of Fluoro Elestomers (Fluoro rubber) system material having strong chemical resistance is formed to improve the oiltight property (leak prevention).

Of course, the material of the pinch preventing portion 43 may be replaced with other materials according to the user and the application field.

The pinch preventing portion 43 forms a coupling groove 42 which is dug inwardly at the lower center, and the coupling groove 24 formed at the upper end of the lower cover 20 corresponds to the coupling groove 42. And combined.

Looking at the flow of the fuel 60 of the fuel pressure regulator 70 for a vehicle to which the guide valve 30 according to the present invention is located on one side of a fuel filter (not shown), the fuel introduced through the lower cover 20 When the predetermined pressure is greater than 60, the valve assembly 40 is lifted up and returned through the top cover 10 through the microgap 33 formed by the guide valve 30 and the valve assembly 40. That's the order.

The upper and lower covers 10 and 20 and the valve assembly 40 are made of SUS (Steel Use Stainless) system material for improving corrosion resistance, which can also be selectively changed by the user.

Figure 6 is a perspective view showing the top cover of the fuel pressure regulator for a vehicle using a guide valve according to the present invention, as shown in the figure is empty inside, the circumferential surface of the return hole 11, the fuel 60 is returned Perforations on the other side, the diameter gradually increases, but shows that the step 12 is formed to increase in step.

Figure 7 is a perspective view showing a guide valve of the fuel pressure regulator for a vehicle using a guide valve according to the present invention, as shown in the figure protrudes in the longitudinal direction on one end of the annular body portion 35 is penetrated through the interior A plurality of fixing members 34 are formed at regular intervals, and a plurality of ribs 31 protruding in the longitudinal direction from the inner circumferential surface of the body portion 35 and the fixing member 34 are formed.

In addition, the other end of the body portion 35 is increased in diameter by the step is formed with a locking step 32 on the outer peripheral surface.

8 is a perspective view showing the valve assembly of the fuel pressure regulator for a vehicle using a guide valve according to the present invention, an annular spring fixing groove which is dug inwardly so that the spring 50 is inserted in the longitudinal direction as shown in FIG. 41) is formed. In addition, one side is formed with a jam prevention portion 43 is the coupling groove 42 is dug in the center.

9 is a perspective view showing a lower cover of a fuel pressure regulator for a vehicle using a guide valve according to the present invention. As shown in the drawing, an inlet hole 21 penetrating the center in the longitudinal direction is formed, and one side is engaged. The part 24 is protruded and the diameter is gradually reduced on the other side, but is reduced to a step to form the step 22.

As mentioned above, although this invention was demonstrated by the limited embodiment and drawing, this invention is not limited by this, The person of ordinary skill in the art to which this invention belongs, Various modifications and changes may be made without departing from the scope of the appended claims.

As described above, the present invention replaces the existing diaphragm assembly composed of several components with a valve assembly applied with a guide valve and a rubber material to simplify the process and reduce the manufacturing cost as well as a small gap between the guide valve and the valve assembly. Pressure gradient control using and improved residual pressure retention characteristics using the valve assembly of the rubber material.

Claims (3)

In the fuel pressure regulator for maintaining a constant fuel pressure by returning the fuel 60 to the tank when the pressure of the fuel 60 introduced into the interior than the set pressure, The return hole 11 in which the fuel 60 is returned is drilled on the circumferential surface, and one side has a shape in which the diameter gradually curves toward the center of one end such that one side of the spring 50 inserted therein is smoothly supported, and the other side is the diameter. An upper cover 10 gradually increasing with the step and forming a plurality of stepped portions 12; Correspondingly coupled to the inside of the upper cover 10, a plurality of fixing members 34 at one end spaced apart and extending from one end is formed in one end, ribs 31 in the longitudinal direction from the inside of the fixing member 34 Protrudes to prevent the shaking in the inside and to be forced to the upper cover 10, the other end to form a locking step 32 corresponding to the inner side of the step 12 of the top cover 10 A diameter of the guide valve 30 which is increased in steps and fixed to the upper cover 10; Is coupled to the inside of the guide valve 30, the other side of the spring 50 is formed in an annular spring fixing groove 41 which is dug in the longitudinal direction so that it can be fixed and fixed, and with the guide valve 30 A valve assembly 40 which forms a microgap 33 in which fuel 60 is returned between the contact surfaces and moves up and down in the longitudinal direction of the guide valve 30; Correspondingly coupled to the bottom surface of the valve assembly 40, the diameter is gradually reduced to form a plurality of step troughs 22 toward the bottom so that the O-ring 23 is fitted to the outer circumferential surface on which the step troughs 22 are formed, and fuel 60 A bottom cover 20 in which an inlet hole 21 penetrating the center is formed so that the inlet is first introduced; Fuel pressure regulator for a vehicle using a guide valve, characterized in that comprises a. The method of claim 1, The valve assembly 40 forms a coupling groove 42 into which the coupling portion 24 protruding from the upper surface of the lower cover 20 prevents the flow of the fuel 60 flowing from the inlet hole 21. To prevent, but to secure the airtight with the lower cover 20, the fuel pressure regulator for a vehicle using a guide valve, characterized in that the pinch prevention portion 43 is selected, the material of the heat resistant, chemical resistance strong FKM system is formed . The method of claim 1, The fuel 60 is initially introduced into the inlet hole 21 of the lower cover 20, but when the pressure of the fuel 60 is higher than the set pressure is higher than the spring 50 due to the pressure of the fuel 60 After pressing and lifting the valve assembly 40, it is returned through the return hole 11 of the upper cover 10 through the microgap 33 of the guide valve 30 and the valve assembly 40. Fuel pressure regulator for automobile using guide valve.

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