KR100690266B1 - The fuel feeder of liquefied petroleum gas for vehicles - Google Patents

Abstract

 The present invention relates to an automotive LLP fuel supply device, and more particularly, to continuously supply fuel recovered from an engine to a fuel supply device inside a fuel tank, and to provide a vehicle with a fuel guide and a backflow prevention means. The present invention relates to a vehicle LFG fuel supply device capable of guiding fuel to be continuously supplied to the engine even when the fuel is concentrated to one side at the time of rapid rotation and slope driving, and at the same time reducing noise and vibration caused by the fuel's slack.

According to the present invention, the vehicle is equipped with a multi-flanged inside of the LLP fuel tank, the Elpji fuel supply for a vehicle consisting of a case member into which the LLP fuel is introduced, and a pump unit built into the case member to supply the LLP fuel to the engine. An apparatus, comprising: a plurality of guide plates coupled to the multi-flange so as to be located inside the case member so that the LPG fuel introduced through the case member is pivoted and introduced into the pump unit, and the fuel formed in the case member A tubular flow tube having a stepped portion formed at one side to be rotatably inserted into the inlet hole, and a rotating hole formed of a pair of guide plates connected to the flow tube in one side so as to communicate with each other in a plurality of frames at regular intervals, and a vehicle To move Elpji fuel recovered from the engine And a return valve provided at one side of the return pipe, and the other end of the return pipe is coupled to an upper portion of the case member so that the LPI fuel recovered to the return pipe is supplied into the case member. It is done.

Vehicle, LPG fuel, pump, reservoir case, pump case, return valve

Description

The LLPIG Fuel Feeder for Vehicles {The fuel feeder of liquefied petroleum gas for vehicles}

1 is a perspective view of an LLP fuel supply device for a vehicle according to the present invention;

Figure 2 is a perspective view showing another embodiment of the vehicle LLP fuel supply apparatus according to the present invention,

3 is an exploded perspective view of FIG. 2;

Figure 4 is a perspective view showing another embodiment of the vehicle LLP fuel supply apparatus according to the present invention,

5 is an exploded perspective view of FIG. 4;

6a to 6c is a longitudinal cross-sectional view showing the operation process of the turning tool in accordance with the present invention,

7 is a configuration diagram of a fuel supply device showing a fuel supply process in a state where the guide plate and the rotation hole are not mounted according to the present invention;

8 is an exploded perspective view of FIG. 7;

 <Description of the code | symbol about the principal part of drawing>

10: multi flange 21: delivery valve

30: pump 34: pump flange

35: pump housing 40: boss

50: case member 51: reservoir case

52,53: fuel inlet hole 54: fuel transport path

55 pump case 100 return tube

101: RETURN VALVE 102: Valve Boss

110: guide plate 120: hoedonggu

121a: step 122: frame

123,124: guide plate 125: through hole

126: rotating plate T: fuel discharge hole

The present invention relates to an automotive LLP fuel supply device, and more particularly, to continuously supply fuel recovered from an engine to a fuel supply device inside a fuel tank, and to provide a vehicle with a fuel guide and a backflow prevention means. The present invention relates to a vehicle LFG fuel supply device capable of guiding fuel to be continuously supplied to the engine even when the fuel is concentrated to one side at the time of rapid rotation and slope driving, and at the same time reducing noise and vibration caused by the fuel's slack.

In general, the LPG vehicle is recommended as a policy because it has less harmful emissions than a diesel or gasoline vehicle. Therefore, the Elpji gas supply schemes used in the Elpige vehicle has been developed in various ways over the years.

In order to sequentially explain the conventional LPG gas supply method (LPG system) according to the developed procedure, LPG system is filled with liquid LLP fuel in a storage tank that is a fuel tank, and the liquid LLP fuel is a gas. It is classified into a method of delivering to the engine in the form of gas and a method of spraying into the engine by the liquid phase itself.

The method of transferring in the form of the former gas is very common and used as a conventional technique, the latter method is injected into the engine by the liquid phase itself has been developed relatively recently, the situation continues to develop these days.

In the method of directly supplying liquid LLP fuel (LPLi system), a storage tank for storing LLP fuel is formed, and a fuel supply device having a fuel supply pump for supplying fuel therein is provided therein.

Since the fuel supply pump is to always deliver the liquid fuel to the intake port of the manifold, it is attached to the bottom surface of the storage tank, so that the liquid fuel into the intake port of the manifold by the fuel pump The air supplied from the throttle valve of the engine is mixed and injected into the cylinder of the engine.

In addition, a reservoir cup is installed to the outside of the fuel supply pump so that an appropriate amount of liquid lpgi fuel is supplied when the fuel is pumped to one side while the vehicle is being driven.

In the conventional fuel supply device configured as described above, when a large amount of fuel is stored in the fuel tank or when the vehicle runs at a constant speed on a flat road, the inlet side of the fuel supply pump is always in the state of being immersed in fuel. Therefore, no abnormality occurs in the supply of fuel.

However, when a vehicle stops quickly and starts or runs down a ramp while a small amount of fuel is stored in the fuel tank, the fuel inlet of the fuel tank is exposed to one side and the inlet of the fuel supply pump is exposed from the fuel. As the fuel is not supplied, the output of the engine is abnormally weakened, and in severe cases, the engine stops, causing the vehicle to stop while driving.

In addition, the phenomenon that the fuel is not instantaneously supplied to the feed pipe due to the fluctuation of the fuel frequently occurs, the air is introduced into the fuel supply line.

In addition, the slumping of the fuel generated during the sudden stop and the rapid rotation of the vehicle was not effectively attenuated by the structure of the reservoir cup. As a result, the noise and vibration according to the flow of the fuel in the fuel tank are transmitted to the driver as it is. There was a problem that the satisfaction for the fall.

 The present invention was devised to solve the above-mentioned problems, and an object of the present invention is to smoothly guide fuel to a pump regardless of the inclination of the fuel tank during rapid rotation of a vehicle and a slope road, thereby smoothly supplying fuel to the engine. In addition to reducing the rapid backflow of fuel from the pump, and by continuously supplying the fuel recovered from the engine to the fuel supply device, the output of the engine is abnormal as the fuel is not supplied smoothly It is to provide a fuel supply device that can prevent the weakening phenomenon.

 Still another object of the present invention is to prevent the fuel from suddenly swinging while the vehicle is running so as to effectively reduce noise and vibration caused by the slump of the fuel.

The configuration of the present invention for achieving the above object is a case member which is installed in the inside of the LLP fuel tank via a multi-flanged medium, the LLP fuel is introduced, and the inside of the case member to supply the LLP fuel to the engine In the vehicle LLP fuel supply device consisting of a pump unit, a plurality of guide plates coupled to the multi-flange to be located inside the case member so that the LLP fuel introduced through the case member is pivoted and introduced into the pump unit. And a pair of guides having a tubular flow tube having a stepped portion at one side so as to be rotatably inserted into the fuel inlet hole formed in the case member, and one side connected to the flow tube in communication with each other at a predetermined interval. Pivoting holes made of plates and recovered from the engine of the vehicle. And a return valve provided at one side of the return pipe, and a return pipe through which the LPI fuel is moved, and the other end portion of the return pipe is connected to the case member so that the Elpji fuel recovered to the return pipe is supplied into the case member. It is characterized in that coupled to the top.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention.

Figure 1 is a perspective view of the vehicle elbow fuel supply apparatus according to the present invention, Figure 2 is a perspective view showing another embodiment of the vehicle elbow fuel supply apparatus according to the present invention, Figure 3 is an exploded perspective view of Figure 2, Figure 4 Figure 4 is a perspective view showing another embodiment of the vehicle LLP fuel supply apparatus according to the present invention, Figure 5 is an exploded perspective view of Figure 4, Figure 6a to Figure 6c is a longitudinal cross-sectional view showing the operation process of the turning tool according to the present invention. 7 is a configuration diagram of a fuel supply device showing a fuel supply process in a state where a guide plate and a rotation hole are not mounted according to the present invention, and FIG. 8 is an exploded perspective view of FIG. 7.

As shown in FIG. 1, the vehicle LLP fuel supply device according to the present invention is mounted inside the LLP fuel tank, and is embedded in the case member 50 into which the LLP fuel is introduced, and the case member 50. And a pump unit for supplying the Elpji fuel to the engine, the return pipe 100 to which the Elf fuel recovered from the engine of the vehicle is moved, and a return valve 101 provided on one side of the return pipe 100; The other side of the return tube 100 is coupled to the upper portion of the case member 50 so that the Elpji fuel recovered to the return tube 100 is supplied into the case member 50.

The return valve 101 is coupled to the valve boss 102 mounted on the fuel tank so that the Elpji fuel recovered through the return pipe 100 from the engine when the vehicle is running continuously continues to the inside of the case member 50. Supplied.

The present invention is preferably applied to a fuel supply device provided with the case member 50 in which the pump unit is embedded, and more preferably, registered Korean Utility Model No. 0352160 registered and filed by the applicant in advance. 2004.05.24) "Vehicle Elbow Fuel Supply System".

The structure of the vehicle LLP fuel supply apparatus will be briefly described with reference to FIGS. 7 and 8. The pump unit is coupled to the multi-flange 10 mounted on one side of the fuel tank and the multi-flange 10. It consists of a plurality of pumps 30, which are built in the fuel tank to supply liquid fuel to the delivery valve 21 of the valve unit, and a pump housing 35 coupled to the outside of the pump 30, Case member 50 is provided with a plurality of different sizes and is coupled to the multi-flange 10 via a hollow boss 40 to guide the fuel of the fuel tank to the delivery valve 21.

Here, the case member 50 is coupled to the boss 40 and is provided at the bottom of the reservoir case 51 into which the liquid fuel contained in the fuel tank flows, and inside the reservoir case 51. A pump case 55 coupled to the boss 40 to be spaced apart from the reservoir case 51 at a predetermined interval so that a fuel transfer path 54 is formed, and the pump housing 35 therein; Comprising a plurality of fuel discharge holes (T) formed in the upper portion of the reservoir case 51 and the upper portion of the pump case 55 to provide a passage for the vaporized fuel is discharged into the fuel tank, the reservoir case A plurality of fuel inlets 52 and 56 are formed in the 51 and the pump case 55, respectively.

The reservoir case 51 and the pump case 55 are both provided in a cylindrical shape having a bottom portion open, and the bottom portion is coupled to the boss 40, respectively, so that the reservoir case 51 and the pump case 55 are separated from each other. The fuel passage 54 is formed and the fuel is moved in the order of I to VI.

As another embodiment of the present invention as shown in Figs. 2 and 3, so as to be located inside the case member 50 so that the LLP fuel introduced through the case member 50 is pivoted and introduced into the pump unit. A plurality of guide plates 110 coupled to the multi-flange 10 is further included.

Here, the same reference numerals as in the above-described drawings indicate the same members performing the same function.

The guide plate 110 is provided to have a curved shape so that the LLP fuel introduced through the fuel inlet hole 52 of the reservoir case 51 is pivoted along the curved portion and then flows into the pump case 55. When the fuel is concentrated to one side during the rapid rotation of the vehicle and the inclined road, fuel flowing back to the fuel inlet hole 56 of the pump case 55 may stay inside the curved portion, and in particular, the guide plate 110 may be resisted. The acting and refluxing fuel is prevented from being rapidly discharged into the reservoir case 51.

 As another embodiment of the present invention as shown in Figure 4 and 6c, the tubular flow pipe 121 is formed with a stepped on one side to be rotatably inserted into the fuel inlet hole formed in the case member 50, One side is connected to the flow pipe 121 in communication with each other and is provided with a rotating hole 120 consisting of a pair of guide plates 123, 124 connected to each other in a plurality of frames 122 at a predetermined interval, in more detail the flow pipe Is inserted into the fuel inlet 52 of the reservoir case 51 of the case member (50).

Here, the same reference numerals as in the above-described drawings indicate the same members performing the same function.

The guide plates 123 and 124 are provided in a disc shape, and the frame 122 is interconnected to be arranged in a circular shape on the guide plates 123 and 124 so that the LLP fuel introduced through the flow pipe 121 is the frame ( 122) It flows through and flows laterally.

Here, a plurality of through holes 125 are formed at the other side of the guide plates 122 and 123, and are rotated between the guide plates 122 and 123 by the flow pressure of the fuel delivered through the through holes 125 to the flow pipe 121. It is preferable to further include a rotating plate 126 to open and close).

That is, the flow pressure of the fuel is driven from the flow tube 121 to the through hole 125 by the driving of the pump 30, the rotating plate 126 is rotated to open the flow tube 121 When the fuel is concentrated to one side during the rapid rotation of the vehicle and the inclined road, the pivoting plate 126 located in the direction in which the fuel is driven by the flow pressure of the fuel is rotated to seal the flow pipe 121, thereby providing the pump case 55. The fuel flowing back to the fuel inlet (56) of the) is to block the discharge to the fuel inlet (52) of the reservoir case (51).

Referring to the operation of the present invention configured as described above based on the path of the supply of the LLP fuel according to the state of the road surface as follows.

When driving the engine of the vehicle to drive the flat surface of the road, the fuel inlet hole of the reservoir case 51 constituting the case member 50 by pressing the liquid fuel while the pump 30 inside the fuel tank is driven ( 52).

The liquid fuel introduced into the fuel inlet hole 52 of the reservoir case 51 is guided by the pivoting hole 110 or the guide plate 120 to between the reservoir case 51 and the pump case 55. After rotating in the circumferential direction along the fuel transport path 54 formed, it is introduced into the pump case 55 through the second fuel inlet hole (56).

The fuel introduced into the pump case 55 is discharged to the delivery valve 21 through the pump 30 embedded in the pump housing 35, and then supplied to the engine along the fuel supply line to supply the vehicle. It can be driven.

Meanwhile, the LLP fuel recovered from the engine when the vehicle is driven is supplied to the inside of the reservoir case 51 through the return pipe 100 connected to the inside of the case member 50, that is, the upper portion of the reservoir case 51. do.

When the vehicle turns along the curve while driving, if the vehicle is inclined in the direction in which centrifugal force is generated or inclined road is in one direction when driving (hereinafter, only the case in which the vehicle is inclined to the left side) will be described. The fuel tank is also slid to the left so that the LLP fuel does not flow smoothly into the fuel inlet hole 52 of the reservoir case 51, or the fuel supplied to the pump 30 is pumped to the pump case 55. The reverse flow phenomenon is discharged to the fuel inlet hole 56 of the) is generated, this phenomenon can be easily prevented by the guide plate 110 or the rotation hole (120).

When the guide plate 110 is installed, when the vehicle is pulled to the left, the guide plate 110 is introduced into the fuel inlet hole 52 formed on the right side of the reservoir case 51 in a state in which the movement speed of the fuel is lowered, and then the guide Elbow which flows along the curved surface of the plate 110 and flows into the fuel inlet hole 56 of the pump case 55, while flowing back from the pump 30 to the fuel inlet hole 56 of the pump case 56. Fuel impinges on the guide plate 110 by driving the pump 30 by staying for a predetermined time while the fuel is collided along the plate 110 installed on the inner left side of the reservoir case 51. Fuel can be supplied to drive the vehicle normally.

In addition, when the rotating hole 120 is installed, if the vehicle is moved to the left side, the fuel inlet 52 and the rotating hole 120 formed on the right side of the reservoir case 51 in a state in which the moving speed of the fuel is lowered. After flowing into the flow pipe 121 of the flow through the fuel inlet hole 56 of the pump case 55 through the side of the pair of guide plates 122 and 123, while the pump case 56 from the pump 30 When the fuel flows back to the fuel inlet hole 56, the rotating plate 126 provided between the guide plates 122 and 123 is provided by the flow pressure of the fuel generated while flowing back to the through hole 125 of the guide plates 122 and 123. Due to the rotation, the flow tube 121 is naturally sealed to prevent the fuel from flowing back into the fuel tank.

On the other hand, the fuel recovered from the engine through the return pipe 100 is supplied through the upper portion of the reservoir case 51, even if the reverse flow phenomenon occurs, the fuel inlet hole 56 of the pump case 55 The fuel supply hole 52 of the case member 50 may be continuously positioned at the lower portion of the fuel tank as the case member 50 is inclined inside the fuel tank. When it is located, even if the above phenomenon occurs in the state where the residual amount of fuel is small, the fuel can be sufficiently supplied to the pump 30 side.

 As described above, the fuel supply device of the vehicle LLP fuel tank of the present invention, while the fuel recovered from the engine through the return pipe 100 is continuously supplied to the inside of the reservoir case 51, the guide plate The 110 or the turning hole 120 guides the fuel to be continuously supplied to the engine even when the fuel is concentrated to one side during the rapid rotation and the inclination of the vehicle, and at the same time, the fuel can block the noise caused by the slack. In addition, since the first fuel inlet hole 52 into which the fuel is introduced is located at the inner lower portion of the fuel tank, the remaining amount of fuel can be sufficiently supplied to secure more driving distance, and thus, the invention is very useful. Will be called.

 As described above, according to the present invention, the fuel recovered from the engine is continuously supplied to the fuel supply device inside the LPG fuel tank, and the fuel is supplied to one side at the time of rapid rotation and slope driving of the vehicle by the guide plate or the rotating hole installed in the case member. In addition, the fuel is guided so that the fuel can be continuously supplied to the engine, and at the same time, the fuel flow back from the pump is reduced, thereby improving the performance of the fuel supply line.

In addition, the fuel is prevented from suddenly fluctuating while the vehicle is running, thereby effectively reducing the noise and vibration caused by the slack of the fuel, and in particular, the configuration of the fuel guide plate and the turning hole is very simple and easy to operate, thus making it reliable. There is an advantage to improve.

Claims (4)

delete delete In the vehicle LLP fuel supply device comprising a case member which is installed inside the LLP fuel tank via a multi-flanged medium, the LLP fuel flows, and a pump unit built in the case member to supply the LLP fuel to the engine, A plurality of guide plates coupled to the multi-flange so as to be located inside the case member so that the LLP fuel introduced through the case member is pivoted and introduced into the pump unit; A tubular flow tube having a stepped portion on one side to be rotatably inserted into the fuel inlet hole formed in the case member; One side is connected to the flow pipe in communication with a rotating hole consisting of a pair of guide plates connected to each other in a plurality of frames at a predetermined interval, It further comprises a return pipe provided on one side of the return pipe and the return pipe to which the Elpji fuel recovered from the engine of the vehicle, And the other end of the return pipe is coupled to an upper portion of the case member so that the Elpji fuel recovered to the return tube is supplied into the case member. The method of claim 3, A plurality of through-holes are formed on the other side of the guide plate, the vehicle elbow fuel supply further comprises a rotating plate rotated between the guide plate by the flow pressure of the fuel delivered through the through opening and closing the flow tube Device.

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