CN1603607B - fuel pump housing - Google Patents

Abstract

An object of the present invention is to provide a fuel pump housing which can smooth the flow of fuel in a fuel pump housing having a fuel passage, and which can increase the degree of freedom in the position and direction of a fuel outlet. Inside the fuel pump casing 80 that contains a fuel passage 82 leading from the discharge port 81 of the fuel pump to the engine 21, the fuel passage 82 includes a fuel outlet 83 perpendicular to the discharge port 81 of the fuel pump, and also includes a The fuel discharged from the discharge port 81 is smoothly guided to the inclined guide surface 84 of the fuel outlet 83 .

Description

fuel pump housing

technical field

The present invention relates to a structure of a fuel pump casing attached to a fuel pump body built in a fuel tank and used when the fuel pump body is mounted on a predetermined part of the fuel tank.

Background technique

Conventionally, a fuel pump housing that is easy to assemble and has a fuel passage and a filter body inside the fuel passage is known (for example, refer to Patent Document 1)

Patent Document 1 Japanese Patent Laid-Open Publication No. 11-200974 (FIG. 1)

Patent Document 1 will be described based on the following drawings.

Fig. 9 is a view illustrating the basic structure of the prior art. In this figure, a fuel passage 202 is formed on the output side of the fuel discharge port 201, a filter body 203 is installed in the fuel passage 202, and a fuel outlet 204 and a fuel discharge port 206 are provided in the fuel tank on the output side of the fuel passage 202. The fuel pump housing 207 of the hidden type fuel pump.

The fuel discharged from the discharge pipe 209 of the fuel pump 208 passes through the filter body 203 provided in the fuel passage 202 of the fuel pump housing 207 , and is output to the engine side from the fuel outlet 204 to the fuel supply pipe 214 .

When the pressure in the fuel passage 202 exceeds a predetermined pressure, the pressure adjusting safety valve 205 opens, and the fuel in the fuel passage 202 flows from the fuel discharge port 206 to the fuel tank side.

The fuel discharged from the discharge pipe 209 of the fuel pump 208 collides with the fuel outlet side surface 212 of the flange member 211 to change direction, collides with the fuel outlet wall 213 of the flange member 211 to change direction again, and enters the fuel supply pipe 214 .

That is, the fuel discharged from the discharge pipe 209 of the fuel pump 208 changes direction by the fuel outlet side surface 212 and the fuel outlet side wall surface 213 of the flange member 211, enters the fuel supply pipe 214, and changes direction twice. For such a flow, it is desired that the fuel flow more smoothly and the flow loss in the fuel passage 202 be reduced.

Contents of the invention

An object of the present invention is to provide a fuel pump housing which can make fuel flow more smoothly in a fuel pump housing having a fuel passage and which can increase the degree of freedom in the position and direction of a fuel outlet.

The first aspect of the present invention is a container that is attached to the fuel pump body and is used when the fuel pump body is mounted on a predetermined position of the fuel tank, and contains a fuel passage from the fuel pump discharge port to the combustion mechanism. In the fuel pump housing, the fuel passage includes a fuel outlet perpendicular to the fuel pump outlet, and includes a guide surface for smoothly guiding fuel discharged from the fuel pump outlet toward the fuel outlet.

The fuel passage includes a fuel outlet perpendicular to the fuel pump outlet, and further includes a guide surface that guides fuel discharged from the fuel pump outlet smoothly toward the fuel outlet.

Due to the guide surface which guides the fuel smoothly from the outlet opening to the fuel outlet, the fuel can flow more smoothly when the direction of the fuel outlet and the fuel pump outlet are different.

Since the fuel can flow more smoothly, the loss of the fuel passage can be reduced.

Furthermore, the position of the fuel outlet can be changed while maintaining the smooth flow of the fuel by including the guide surface that guides toward the fuel outlet.

In a second aspect of the present invention, the guide surface is formed by inclining a wall surface of the fuel pump housing with respect to the fuel pump discharge port.

An inclined guide surface is formed by inclining the wall surface of the fuel pump housing so that the fuel discharged from the fuel pump discharge port goes smoothly toward the fuel outlet.

Since the guide surface is formed by inclining the wall surface of the fuel pump housing, the fuel in the fuel passage can flow more smoothly without preparing additional parts.

A third aspect of the present invention is that the guide surface is a guide plate inclined in the fuel passage.

The inclined guide plate serves as a guide surface provided so that the fuel discharged from the discharge port of the fuel pump goes smoothly toward the fuel outlet and includes a fuel passage.

Since the inclined guide plate is used as the guide surface including the fuel passage, the fuel flow can be smoothly deflected toward the fuel outlet by the guide plate without depending on the shape of the fuel pump housing.

In a fourth aspect of the present invention, when the pressure in the fuel passage exceeds a predetermined pressure, the safety valve for returning fuel to the fuel tank opens to face the fuel passage.

Since the safety valve that returns fuel to the fuel tank opens when the pressure exceeds a predetermined pressure, it faces the above-mentioned fuel passage, so that additional parts related to the safety valve, such as other fuel return piping and safety valve mounting brackets, are not required.

Since the relief valve is integrated with the fuel pump housing, the rotational space of the fuel pump housing, which is much constrained, can be effectively utilized.

In the first aspect of the present invention, since the guide surface for guiding the fuel to flow smoothly is included toward the fuel outlet, there is an advantage that the fuel can flow more smoothly and the loss of the fuel passage can be reduced.

In the second aspect of the present invention, since the guide surface is formed by inclining the wall surface of the fuel pump housing, there is an advantage that fuel in the fuel passage can flow more smoothly without preparing additional parts.

In the third aspect of the present invention, since the attached inclined guide plate is used as the guide surface, there is an advantage that the fuel flow can be smoothly deflected toward the fuel outlet regardless of the shape of the fuel pump housing.

In the fourth aspect of the present invention, since the safety valve that returns the fuel to the fuel tank is opened when the pressure exceeds a predetermined pressure, it faces the above-mentioned fuel passage, and the present invention has the advantage of eliminating the need for other fuel return piping and safety valve installation brackets related to the safety valve. The advantages of adding components.

Description of drawings

Fig. 1 is a side view of a motor vehicle with a fuel pump housing according to a first embodiment of the present invention;

Fig. 2 is an enlarged sectional view of part 2 in Fig. 1, which is a sectional view of a fuel tank equipped with a fuel pump casing according to the first embodiment of the present invention;

Fig. 3 is a view seen along the direction shown by arrow 3 in Fig. 2;

Fig. 4 is an action diagram of a fuel pump casing equipped with a fuel pump according to the first embodiment of the present invention;

5 is a sectional view of a fuel pump housing according to a second embodiment of the present invention;

Fig. 6 is a view seen along the direction shown by arrow 6 in Fig. 5;

7 is a sectional view of a fuel pump housing according to a third embodiment of the present invention;

8 is a sectional view of a fuel pump housing according to a fourth embodiment of the present invention;

Fig. 9 is a view illustrating the basic structure of the prior art.

Explanation of reference signs

42 Fuel tank, 43 Fuel pump, 80 Fuel pump housing, 81 Fuel pump outlet, 82 Fuel passage, 83 Fuel outlet, 84 Guide surface, 88 Safety valve, 104 Guide surface wall, 105 Fuel outlet side wall, 106 Fuel Outlet side upper wall, 107 filters, 108 inclined guide plates.

Detailed ways

Fig. 1 is a side view of a motorcycle including a fuel pump housing according to a first embodiment of the present invention, and the drawing is viewed from the direction indicated by the symbol arrow.

Automatic two-wheeled vehicle 10 mainly comprises vehicle body frame 11, the front fork 12 that is installed on the top tube 11a of vehicle body frame 11, the front wheel 13 that is installed on the front fork 12, the handle 14 that links to each other with front fork 12, in the vehicle The rear portion of the body frame 11 can swing up and down the combined swing engine 15 installed, the rear wheel 16 installed on the combined swing engine 15, the rear cushion unit 17 of the suspension combined swing engine 15 rear end, installed behind the car body frame 11 The storage box 18 on the upper part is provided with a seat 19 installed on the storage box 18 and can be opened and closed.

The vehicle body frame 11 is a frame formed by connecting a die-casting front frame 11F and a die-casting rear frame 11R integrally formed with the top pipe 11a by a connecting portion 11C.

Combined swing engine 15 is made up of engine 21 and the continuously variable transmission machine 22 of the belt converter with centrifugal clutch. The engine 21 is a water-cooled 4-stroke engine facing between the tank 18 housing the cylinder portion and the fuel tank 42 and inclined substantially horizontally.

This motorcycle 10 covers the vehicle body frame 11 with the body cover 30 . The body cover 30 includes a front cover 31 covering the front of the top pipe 11a, a leg shield 32 covering the rear of the front cover 31 while covering the front of the driver's feet, a footrest (low bed type footrest) for carrying the driver's feet. ) 33, a pair of left and right base plate side covers 34 extending downward from the outer edge of the pedal 33, a bottom cover 35 covering between the lower edges of the base plate side covers 34, a seat lower cover 36 covering the lower front portion of the seat 19 , cover the back cover 37 on the lower rear portion of the seat seat 19 and the rear wheel 16 top, a pair of side covers 38 on the left and right.

This automatic two-wheeled vehicle 10 arranges the main switch (ignition switch) 41 in the leg shield 32 part, and arranges the fuel tank 42 and the fuel pump built in the fuel tank 42 under the foot pedal 33. A not-shown bracket is provided on the rear upper end of the vehicle body frame 11, and a radiator reserve oil tank 44, a battery 45, and a control device 46 are arranged on the bracket.

In the figure, reference numeral 51 denotes a handle, 52 denotes a left brake lever, 53 denotes an instrument panel, 54 denotes a reflector, 55 denotes a pair of left and right indicators set in the front direction, 56F denotes a front handle cover, and 56R denotes a rear handle cover , 57 represents the front light, 58 represents the horn arranged in the front cover 31, 59 represents the front fender that rotates together with the front fork 12, 61 represents a pair of engine hooks on the left and right, 62 represents the pedal starting pedal for the engine to start, 63 Indicates an air cleaner installed on the left side of the vehicle body, 64 indicates a carburetor, 65 indicates an engine cooling radiator installed at the right end of the crankshaft 21a of the engine 21, 66 indicates an exhaust pipe for an engine, and 67 indicates an exhaust pipe installed on the vehicle. The exhaust muffler on the right side of the body is used, 71 represents the main support frame, 72 represents the rear fender, 73 represents the tail light, 74 represents the rear direction indicator, 75 represents the bracket, and He represents the helmet.

Fig. 2 is an enlarged cross-sectional view of two parts of Fig. 1, and is a cross-sectional view showing a fuel tank equipped with a fuel pump housing according to a first embodiment of the present invention.

The fuel pump housing is attached to the main body of the fuel pump 43 and is used when the main body of the fuel pump 43 is installed on a predetermined position in the fuel tank 42. (Refer to FIG. 1) In the fuel pump housing 80 of the fuel passage 82, the fuel passage 82 includes a fuel outlet 83 perpendicular to the discharge port 81 of the fuel pump, and also includes a fuel that is discharged from the discharge port 81 of the fuel pump 43, smoothly The inclined guide surface 84 that guides the fuel outlet 83 to the ground.

A fuel supply passage 85 is provided in the fuel outlet 83 , and a fuel pipe 87 is attached to an outlet 86 of the fuel supply passage 85 toward the engine side.

A fuel discharge port 89 connected to a safety valve 88 is provided in the fuel passage 82 .

91 is a suction port for sucking fuel from the fuel tank 42, 92 is an approved filter, 93 is a fuel shortage detection device, and 84 is a float for fuel shortage detection.

The installation relationship of the fuel pump housing 80 will be introduced below.

The fuel tank 42 is mounted on the front frame 11F, and the tank mounting bracket 96 for fitting the fuel pump housing 80 is provided on the fuel tank 42 .

In order to fix the fuel pump housing 80 to the fuel tank 42 , screws 98 are preliminarily installed on the container mounting bracket 96 via the auxiliary bracket 97 .

Therefore, the fuel pump main body 43 , the fuel pump case 80 to which the safety valve 88 is installed, and the seal member 99 are installed on the container mounting bracket 96 , the fixing member 101 is placed on the fuel pump case 80 , and finally, the nut 102 The fuel pump housing 80 is fixed.

A safety valve 88 that opens when the internal pressure of the fuel passage exceeds a predetermined pressure to return fuel to the fuel tank 42 is provided in the fuel passage 82 .

By providing the safety valve 88 in the fuel passage 82, it becomes unnecessary to provide additional components related to the safety valve, such as a fuel return pipe and a safety valve mounting bracket.

Since the safety valve 88 is integrated with the fuel pump housing 80 , the rotation space of the fuel pump housing 80 which is much constrained can be effectively utilized.

3 is a view seen in the direction of arrow 3 in FIG. 2 , showing the fuel passage 82 formed in the fuel pump housing 80 and the fuel supply passage 85 disposed in the discharge port 83 of the fuel passage 82 .

103 is a power supply socket for supplying power to the fuel pump 43 (see FIG. 2 ).

For example, by arranging the fuel passage 82 to move along the arrow a or b around the point P, the position of the fuel outlet 83 can be changed while maintaining a smooth flow of fuel.

That is, by moving the fuel passage 82 including the inclined guide surface 84 (refer to FIG. 2 ), the position of the fuel outlet 83 can be changed without impairing the smooth flow of fuel.

Fig. 4 is an operational view of a fuel pump housing to which a fuel pump is assembled according to the first embodiment of the present invention. The fuel that enters the fuel pump 43 from the suction port 91 through the admission filter 92 enters the fuel passage 82 from the fuel discharge port 81 as shown by the arrow d, and passes from the discharge port 81 toward the fuel outlet 83. Due to the function of the guiding surface 84, the fuel can flow to the fuel outlet 83 more smoothly. When the fuel pressure in the fuel passage 82 rises above a predetermined pressure, the fuel flows through the safety valve 88 as indicated by an arrow e.

The fuel discharged from the fuel pump discharge port 81 is guided by a guide surface 84 disposed obliquely to the fuel passage 82 , changes direction gradually, and flows into the fuel supply pipe 85 .

Since the fuel changes direction slowly from the guide surface 84, flows smoothly, and enters the fuel supply pipe 85, there is little flow disturbance.

Thereby, the loss of the fuel passage 82 can be reduced.

Furthermore, since the safety valve 88 is integrated with the fuel pump housing 80, no additional parts related to the safety valve are required, and the rotation space of the fuel pump housing 80, which is much constrained, can be reduced.

Further, the guide surface 84 is formed by inclining the wall surface 104 of the fuel pump housing 80 so that the fuel discharged from the fuel pump discharge port 91 is inclined toward the fuel outlet 83 smoothly.

Since the guide surface 84 is formed by inclining the wall surface 104 of the fuel pump housing 80, the fuel in the fuel passage 82 can flow more smoothly without preparing additional components.

Since the fuel can flow smoothly, the loss of the fuel passage 82 can be reduced.

Considering the loss of the fuel passage 82, the inclination angle θ1 of the guide surface 84 in the fuel passage 82, the distance L2 between the center of the fuel pump discharge port 81 and the fuel outlet side wall surface 105, and the height H2 of the fuel outlet side upper wall surface 106 can be arbitrarily set up.

In the fuel passage 82, a safety valve 88 may be provided on the fuel outlet side. Since the safety valve can be arranged on the side of the fuel outlet 83, the degree of freedom in design can be improved while smoothing the fuel flow.

Thus, the position of the fuel outlet 83 can be changed without loss of fuel flow.

6 is a view taken along the direction indicated by arrow 6 in FIG. 5 , showing the fuel passage 82 formed on the fuel pump housing 80 and the fuel supply passage 85 provided on the fuel outlet 83 of the fuel passage 82 .

103 is a power supply socket for supplying power to the fuel pump 43 .

Also, the width W2 of the fuel passage 82 can be set arbitrarily.

7 is a cross-sectional view of a fuel pump housing according to a third embodiment of the present invention, in which a filter 107 for filtering fine foreign matter that cannot be removed by the allowable filter 92 (see FIG. 4 ) is provided in the fuel passage 82 .

Since the filter 107 is provided in the fuel passage 82, fine foreign matter can be removed while maintaining a smooth flow of fuel.

8 is a cross-sectional view of a fuel pump housing according to a fourth embodiment of the present invention, showing a case where the guide surface 84 is a guide plate 108 inclined in the fuel passage 82 .

The inclined guide plate 108 is used as a guide surface 84 included in the fuel passage 82 provided so that the fuel discharged from the fuel pump discharge port 81 goes smoothly toward the fuel outlet 83 .

Since the inclined guide plate 108 is used as the guide surface 84 included in the fuel passage 82 , the fuel can be smoothly deflected toward the fuel outlet 83 without depending on the shape of the wall surface 104 of the fuel pump housing 80 .

In addition, the fuel pump housing of the present invention is suitable for a two-wheeled vehicle with a built-in fuel tank, a tricycle, or a general vehicle.

Industrial Utilization Possibility

The fuel pump housing of the present invention is suitable for two-wheeled vehicles.

Claims (1)

1. one kind attached to the container that uses on the petrolift body and when being installed in the petrolift body on the fuel pot assigned position, it is characterized in that: keep from above-mentioned petrolift exhaust port in the shell of fuel pump of the fuel passage of combustion mechanism interior, safety valve and the petrolift opening when the pressure in the fuel passage surpasses authorized pressure and make fuel return fuel pot are installed in the above-mentioned shell of fuel pump, above-mentioned fuel passage (82) comprises the fuel outlet (83) vertical with above-mentioned petrolift exhaust port (81), and comprise the fuel discharge outlet (89) that is communicated in above-mentioned safety valve, at above-mentioned fuel outlet (83) supply of fuel road (85) is set, above-mentioned fuel passage comprises the guide surface that successfully leads towards fuel outlet ground from the fuel of petrolift exhaust port discharge, by making the above-mentioned guide surface of wall inclination formation with respect to the shell of fuel pump of petrolift exhaust port; And from the flow direction of petrolift exhaust port (81) to supply of fuel road (85), fuel is positioned at opposition side from petrolift exhaust port (81) to the flow direction of fuel discharge outlet (89) with respect to fuel.

Images