JPS62191657A - Device for feeding fuel for vehicle - Google Patents

Abstract

PURPOSE:To stably transfer liquid fuel from one of the bottom parts of a fuel tank to the other in spite of variation in fluidity by operating a jet pump using the flow energy of said liquid fuel which is returned to said fuel tank. CONSTITUTION:When a key switch 36 is closed, a main fuel pump 23 is driven by a storage battery 24 and the liquid fuel in the bottom part 15 of a fuel tank 10 is sucked in from a suction port 32 and discharged out of a discharge port 33. Then, the liquid fuel is sent to an engine 38 through a fuel feed conduit 40, and the remaining liquid fuel without being consumed in the engine 38 is introduced into a jet pump 70 through a pressure regulator 53 and a fuel return conduit 50. And, the liquid fuel is jetted out of the orifice 81 of a nozzle part and, due to negative pressure which is generated at this time in a liquid fuel passage 76, the liquid fuel in the bottom part 16 of the fuel tank 10, together with the liquid fuel jetted out of the orifice 81, is discharged into said bottom part 15 out of an outlet 86.

Description

[Detailed description of the invention]

(Industrial Application Field) The present invention relates to a vehicle fuel supply device for supplying liquid fuel to an engine mounted on a vehicle. (Prior Art) In recent years, the interior space of vehicles has become increasingly narrow due to the increase in the number of various parts. In order to make the cabin space as wide as possible, it is desired to make effective use of the space outside the cabin, so there are cases where it is not possible to install a fuel tank with a single V-shaped bottom wall. Occurs often. In such cases, it is necessary to provide a raised part on the bottom wall of the fuel tank to form a recess on the outside of the tank in which the parts can be accommodated or passed through. . Alternatively, it is necessary to configure the fuel tank with two or more completely independent tank parts, and to install these tank parts in respective open locations. Thus, modern fuel tanks are configured to have two or more separate bottoms. (Problem to be Solved by the Invention) In order to supply liquid fuel to an engine in a fuel tank having a shape such that two or more bottoms are located on the right side, a fuel pump is used to supply liquid fuel to an engine. If installed in the first bottom, almost all of the liquid fuel in the first bottom will be supplied to the engine, but liquid fuel will remain in the remaining bottom. In order to effectively utilize the liquid fuel in all the bottoms, it is necessary to install the same fuel pump in each bottom. However, this increases costs and also A large amount of power is required to drive the pump, which is disadvantageous in light weight.The object of the present invention is to provide a 1'l fuel supply system for a vehicle that can solve the problems of the above-mentioned prior art. (Means for solving the problem) According to the present invention, a vehicle fuel supply device for supplying liquid fuel to an engine mounted on a vehicle is provided, which is separated into two parts. a fuel tank having at least first and second bottoms and containing liquid fuel therein; an intake port communicating with the first bottom of the fuel tank;
and a main fuel pump having a discharge port i for discharging liquid fuel sucked from the first bottom through the suction port, one end being connected to the discharge port of the main fuel pump,
a fuel supply conduit whose other end is connected to the engine and which pumps liquid fuel discharged from the main combustion pump 11 to the engine; one end of which is connected to the fuel supply device; connected between II! ! a fuel return conduit having an end communicating with the first bottom of the fuel tank and returning excess liquid fuel from the fuel supply conduit to the first bottom; a first pressure regulator for regulating the flow of liquid fuel 71 through the fuel return conduit back to the first bottom section to regulate the pressure of the liquid fuel pumped to the engine in the first predetermined vessel; , a Geno 1 head bomb for being driven by the flow of liquid fuel returned to the first bottom through the fuel return conduit to cause liquid fuel in the second bottom to be delivered IF to the first bottom; , and a second pressure regulator for adjusting the pressure of liquid fuel in the portion of the fuel PI return conduit between the first pressure regulator and the jet pump to a second predetermined value 4p3-+j. The above-mentioned problems of the prior art can be solved by a fuel supply device for a wide vehicle, which is characterized by having a pressure regulator. (Operation) A main fuel pump having a suction port communicating with a first bottom of the fuel tank sucks liquid fuel in the first bottom;
It is pumped to the engine via the fuel supply conduit. The pressure of the liquid fuel pumped to the engine is then regulated to a first predetermined value by a first pressure regulator, and excess liquid fuel is passed through a fuel return conduit to the first bottom of the fuel tank. be returned. The liquid fuel returned to the first bottom of the fuel tank is regulated by a second pressure regulator to a second predetermined pressure value and flows into the jet pump, which then operates at a constant pressure to drain the fuel tank. The liquid fuel F1 in the second bottom of is pumped to the first bottom. (Example) The present invention will now be described in detail with reference to the accompanying drawings. FIGS. 1 and 2 show a fuel supply 'A'? i is indicated J5, and the fuel supply device 11 is indicated in its entirety by the reference numeral 10! The fuel tank 1o is formed by pressing a metal plate and is mounted on the lower part of the vehicle. The fuel tank 1o has a bottom wall 11 and a peripheral wall 1.
2 and the clap wall 13 to the right, and the bottom! j! 11 (,L
A raised portion 14 is provided! 7, forming first and second bottom portions 15 and 16 which are valved. , then,
In the raised portion 14, a recess 17 formed on the outside of the fuel tank 10 allows a drive shirt 21 and an exhaust pipe 22 of the vehicle to be installed. The fuel tank 10 is filled with liquid fuel such as gasoline. For example, even if all of the liquid fuel in the first bottom part 15 is sucked up by the pump installed in the first bottom part 15, liquid fuel will remain in the second bottom part 16. The fuel tank 10 has such a shape. , 1, the bottom of the first bottom portion 15 and the bottom of the second bottom portion 16 are not in communication with each other. The fuel tank 10 is separated from each other by three or more! The bottom part may have a curved bottom. A main light r1 pump 23 is disposed at the first bottom 15 of the fuel tank 10, and the main fuel pump 23 is powered by a DC motor driven by an on-vehicle battery 24 as a U source and a rotating shaft of the monitor. A driven regeneration pump part is housed in the housing, e.g.
9 i47, 'l 49 jL&hiYm3.676
．． It may be a known pump such as that disclosed in No. 025. The child twisting pump 23 has a mounting bracket 1-2.
6 via a cushion rubber 27, and the main fuel pump 23 is directly attached to the +17 attachment bracket 1.
-26 is not transmitted. The phrase bracket 26 is a flange member fixed to the side wall 13 with a screw (not shown) via a sealing member 29 so as to cover the M1 port 131 provided in the side wall 13 of the fuel tank 10. It is welded to the inner surface of 28. Main fuel pump 23
The suction port 32 and the discharge ports 1 to 33 are connected to the right, and the lI
Three suction ports 32 communicate with the bottom of the first bottom portion 15 via a filter 34 for removing foreign matter made of resin or wire mesh. The main fuel pump 23 is connected to the key switch 3
6 is connected to the vehicle via the door 135.
When the -1 knee switch 36 is closed, the liquid fuel in the first bottom part 15 is transferred to the filter 34.
The air is sucked through the suction port 32, pressurized, and discharged from the discharge port 33. 1 Fuel pump 23's Illll water output 33 is a rest!
The fuel supply conduit 40 is connected to the fuel Fl 1+4 injector (shown C) of the vehicle engine 38 via a fuel supply conduit designated by the numeral 40. Specifically, the fuel supply conduit 40 has one end connected to the main fuel A rubber hose 41 is connected to the discharge port 33 of the pump 23, and one end is connected to the other end of the rubber hose 41. That vibe 42 (
l! ! A metal vibrator 43 is connected to one end and the other end is connected to the inlet of the three-way joint 1-45, one end is connected to the first outlet of the three-way join 1-45, and the other end is connected to the fuel of the engine 38. It is made up of a metal pipe 46 connected to the injection valve. In this way, the fuel supply conduit 40
One end is connected to the discharge port 33 of the main fuel pump 23,
The other end is connected to the fuel ↑z1 injection valve of the engine 38, so that the liquid fuel discharged from the main fuel pump 23 can be pumped to the fuel injection jt. The vibrator 42 is fixed to the flange member 28 by four roweys. A second outlet of the three-way joint 45 is connected to a fuel return conduit, the rest of which is indicated by the reference numeral 50. U↓Personally speaking, the fuel return conduit 5o is a metal pipe whose one end is connected to the second outlet of the three-way joint 45 and the other end is connected to the inlet L1 vibe 52 of the first pressure regulator 53. 51 and a first pressure regulator 53 at one end.
The other end is connected to the exit vibe 57 of the three-way joint 5.
a metal pipe 56 connected to the inlet of the flange 8; a metal pipe 59 having one end connected to the first outlet of the three-way joint 58; ] It has a metal vibro 1 which extends through the S material 28 and whose other end communicates with the first bottom part 15 of the fuel tank 10. And Vibro 1

[The fuel return conduit 50t is fixed to the flange member 28 by a bolt. In this way, one end of the fuel return conduit 50t is connected to the three-way joint 1 through 45 to the fuel supply conduit 40.
(It is connected between one end and the other end of the supply pipe 40, and the other end communicates with the first bottom part 15 of the fuel tank 10, and the excess liquid fuel not used by the engine 38 is supplied to the fuel supply pipe 40.) A first pressure regulator 53 provided in the fuel return conduit 50 returns the fuel return conduit 40 to the first bottom 15 through the fuel return 4??50. The flow value of the liquid fuel returning to the bottom 15 of the fuel tank is adjusted to adjust the amount of liquid fuel pumped to the fuel injection valve of the engine 38 to a first predetermined value, for example, 250 KPa. An auxiliary fuel pump 7o is disposed in the first bottom 15 of the metal vibro 10.As will be described later in connection with FIG. The intake port of the jet 1 pump 70 is connected to the second bottom 16 of the fuel tank 10 via a fuel intake pipe 72. Specifically, the fuel intake pipe 72 One end is connected to the suction port i of the jet 1 to the pump 70, and the fuel link is connected to the fuel suction pipe 72 through the hole 73 (the l!! end is connected to the fill hole 34 and the first end). The fuel suction pipe 72 extends along the protrusion 14 provided on the bottom wall 11 of the fuel tank 10. The engine bomb 70 is a fuel return guide.
The liquid fuel in the second bottom part 16 of the fuel tank 10 is pumped into the first bottom part 15 by the flow of liquid fuel sent through the fuel tank 10 and discharged from the outlet part 74. <There is one. Jeets! - Drawing of the pump 70 will be explained in detail with reference to FIG. The jet pump 70 G, has a substantially cylindrical main body 75 in which a liquid passage 76 is formed inside,
An inlet member 77 is attached to one end of the main body 75 in the axial direction by ultrasonic welding, and a liquid passage 78 formed inside the inlet member 77 is connected to the liquid passage 76 of the main body 75.
In the liquid passage 78, a filter 71 made of a full-length or resin is planted. And that person 1
A nozzle portion 79 is provided with an A-refit 81 having a circular cross section at the end of the member 77 opposite to the inlet 82 and facing the inner axis.
are integrally formed. In addition, the axial direction 1 of the main body 75
1j! The outlet portion 74 mentioned above integrally projects from the end, and a venturi portion 84 attached to the outlet portion 74 communicates with the liquid passage 76 of the main body 75 and has an outlet 86. ing. In addition, a suction port 91 is formed in the peripheral wall of the main body 75 and opens as a VJl in the orifice 81 of the nozzle part 79 and communicates with the liquid passage 76. integrally protrudes radially outward from the peripheral wall of the And the entrance member 7
7 is connected to the vibro 1 shown in FIG. 1, and the suction port section 92 is connected to the fuel suction pipe 72 shown in FIG. The main body 75 and the inlet member 77 are made of boria tar resin. As shown in FIG. 1, the second outlet of 58 to the three-way joint 1 is connected to a fuel inlet conduit, generally indicated by the reference numeral 100. Specifically, the fuel outlet conduit 100 has one end connected to the second outlet of the three-way joint 58 and the other end connected to the second pressure regulator 1.
Metal vibrator 10 connected to artificial vibrator 102 of 03
1, a metal vibrator 104 having one end connected to the outlet vibrator 105 of the second pressure regulator 103, and one end connected to the (l!! end of the vibrator 104 and extending through the flange member 28). a metal pipe 10 having
6. In this case, the fuel pipe 100
The first pressure regulator 53 and jet pump 7o
a fuel return conduit 100 having one end connected to a portion of the fuel return conduit 50 and the other end communicating with the first bottom 15 of the fuel tank 10; 2
The pressure regulator 103 is the first pressure regulator 5
Fuel f81 return conduit 50 between 3 and jet pump 7o
The pressure of the liquid fuel in the section is adjusted to a second predetermined value, such as 110 KPa. The excess liquid fuel F1 is then vented to the first bottom 15 of the fuel tank 10 through the fuel drainage conduit 100. The operation of the vehicle fuel supply system shown in FIGS. 1 and 2 will now be described. When the key switch 36 is closed, a voltage of 12V is applied from the battery 24 to the main fuel pump 23, and the main fuel pump 23 is driven. The driven main fuel pump 23 sucks the liquid fuel in the first bottom 15 of the fuel tank 10 from the suction port 32 through the filter 34, and discharges it from the discharge port 33 at a discharge pressure of 250 KPa. The liquid fuel discharged from the main fuel pump 23 flows into the three-way joint 1-45 through the hose 41, the vibrator 42, and the vibrator 43 of the fuel supply conduit 40, and the liquid fuel flowing into the three-way joint 45 passes through the vibrator 46. The remaining liquid fuel that has not been consumed by the engine 38 is sent to the engine 38 through the first pressure regulator 53 and the fuel II return 4 pipes 50, vibrator 51, vibrator 56, vibrator 59, and vibro 1. It is returned to the first bottom 15 of the tank 10 and introduced into the jet pump 70. The second pressure regulator 103 then maintains the pressure of the liquid fuel in the portion of the fuel return conduit 50 between the first pressure curry vulator 53 and the jet pump 70 at a second predetermined value, i.e. the engine 38 but is returned to the first bottom 15 of the fuel tank 10 through the fuel return conduit 50 n! Liquid fuel is introduced into the jet pump 70 at a constant pressure regardless of fluctuations, and the remaining liquid fuel that is not sent to the jet pump 70 is transferred to the fuel pump 101, the vibe 104, and the vibe 1 of the fuel release conduit 100.
06 to the first bottom 15 of the fuel tank 10. The liquid fuel Fl introduced into the jet pump 70 is injected from the orifice 81 of the nozzle portion 79, and a negative pressure is created in the liquid passage 76 in a well-known manner, and the fuel tank 10
The liquid fuel 71 in the second bottom part 16 passes through the fuel suction pipe 72, is sucked into the liquid passage 76 from the suction port 91, and reaches the venturi part 84 together with the liquid fuel injected Q4 from the Δrefice 81. The liquid is then discharged from the outlet 86 to the first bottom portion 15 . Thus, the liquid fuel in the second bottom 16 is transferred to the first bottom 1
5, the liquid fuel in the first bottom part 15 and the liquid fuel in the second bottom part 16 are substantially all supplied to the carrot 38, and the liquid fuel t;1 remains in the second bottom part 16. This prevents this from happening. FIG. 3 shows a second embodiment of the fuel supply device for middle wheels according to the present invention. Inside the fuel tank 10a used in the second embodiment shown in FIG. Partition wall 14
a is provided, and the space within the fuel tank 10a is divided into a first and second fuel chamber 18a and 18b, and the first combustion chamber 10a is provided with a fuel tank 10a. The first chamber 18a has a first bottom 15a, and the second fuel chamber 18b has a second bottom 16a. The fuel suction pipe 72a corresponding to the fuel 11 suction pipe 72 of the first embodiment shown in FIG.
It extends across the partition wall 14a outside of 0a. Fuel supply 14 t according to the second real Jtj example shown in FIG.
The structure of the 'j/ pond is substantially the same as that of the first embodiment shown in FIGS. 1 and 2, so a description thereof will be omitted. FIG. 4 shows a third embodiment of the present invention.
The fuel tank used in the third embodiment H shown in the figure has completely separate first and second fuel tank parts 10b and 10b2, with the first fuel tank part 10b1 being the first fuel tank part 10b1. The bottom part 15b of 1 is also connected to the second combustion
The tank part 10b2 has a second bottom part 16t), and the first and second fuel tank parts 10b1 and 10b2 are respectively located at separate locations. and,
A fuel intake pipe 72b corresponding to the fuel intake pipe 72 of the first embodiment shown in FIG.
1 c1 wall 13b1 and second fuel tank portion 10b
It extends through the top wall 13b2 of . The other structure of the fuel supply system of the third embodiment shown in FIG. 4 is substantially the same as that of the first embodiment shown in FIGS. 1 and 2. In addition, in J3 in the first to third embodiments described above, the other end of the vibe 106 of the fuel relief conduit 100 is connected to the fuel tank 1.
0.10a, 10b, 10b2 first bottom 15.
15a and 15b, but this is not essential, and if you sacrifice a slight decrease in efficiency, the other end of the vibrator 106 can be connected to the second bottom part 16.16.
a, 16b. (Effects of the Invention) Conventionally, the so-called surplus liquid fuel that remained without being supplied to the engine was passed from the first pressurized tank to the fuel return conduit and burned. However, in the present invention, the flow energy of the liquid fuel returned to the fuel tank is used to operate the jet pump, and the liquid fuel is returned to the second bottom of the fuel tank. Since the liquid fuel in the engine is transferred to the first bottom, effective use of power can be achieved and excellent flow performance can be obtained.In addition, the second pressure regulator is not supplied to the engine. The IE force of the liquid fuel introduced into the jet pump is kept constant regardless of the flow rate transformation of the liquid fuel returned to the first bottom of the tank.
As a result, the operation of the Geno 1 pump is stable,
The transfer of liquid fuel from the second bottom of the fuel tank to the first bottom can be ensured. Furthermore, since the shape of the fuel tank can be adjusted to a certain degree, it is possible to place the fuel tank anywhere on the vehicle, or to attach vehicle parts between the first bottom and the second bottom. Convenience in utilizing vehicle space, such as arranging and arranging space, is greatly improved. .

[Brief explanation of drawings]

1 is a schematic cross-sectional view showing the entire vehicle fuel supply system according to the first embodiment of the present invention, and FIG. 2 is a sectional view C' showing the jet pump shown in FIG. 3 and 4 are schematic diagrams showing second and third embodiments of the present invention. 10.10a, 10b, 10b2--Burr! 1 tank, 15.15a, 15b--first bottom, 16°16a, 16b-: bottom of 12, 23, 1 fuel 11 pump, 32... suction port, 33...Illll-to, 38... Engine, 40... Fuel fi + supply conduit,
50... Fuel return conduit, 53... First local regulator, 70... Di1 I pump, 103...
A second pressure regulator. 1 person Akira Asamura 2 Figure 3 Figure 4

Claims (6)

[Claims] (1) A vehicle fuel supply device for supplying liquid fuel to an engine mounted on a vehicle, which has at least first and second bottom portions separated from each other and stores liquid fuel therein. a main fuel pump having a suction port that communicates with the first bottom of the fuel tank and a discharge port that discharges liquid fuel sucked from the first bottom through the suction port; connected to the discharge port of a main fuel pump;
A fuel supply conduit whose other end is connected to the engine and which pumps liquid fuel discharged from the main fuel pump to the engine; one end of which is connected to the fuel supply conduit and between the one end and the other end of the fuel supply conduit; and the other end is connected to the first end of the fuel tank.
a fuel return conduit communicating with a bottom of the fuel supply conduit and returning excess liquid fuel from the fuel supply conduit to the first bottom; a first pressure regulator for regulating the flow rate of returning liquid fuel to adjust the pressure of liquid fuel pumped to the engine to a first predetermined value; through the fuel return conduit to the first bottom; a jet pump operated by the returning flow of liquid fuel to pump liquid fuel in the second bottom to the first bottom; and a jet pump between the first pressure regulator and the jet pump; A second pressure regulator for regulating the pressure of liquid fuel within a portion of the fuel return conduit to a second predetermined value. (2) a fuel relief between the first pressure regulator and the jet pump having one end connected to a portion of the fuel return conduit and the other end communicating with the first bottom of the fuel tank; 2. The vehicle fuel supply system of claim 1, further comprising a conduit, and wherein said second pressure regulator is disposed in said fuel relief conduit. (3) The vehicle fuel according to claim 1 or 2, wherein the bottom wall of the fuel tank is provided with at least one protuberance to form the first and second bottoms. Feeding device. (4) The interior of the fuel tank is provided with at least one partition wall to divide the space inside the fuel tank into at least a first and a second fuel chamber, and the first fuel chamber is connected to the first fuel chamber. 3. The fuel supply device for a vehicle according to claim 1, wherein the fuel supply device has a bottom portion, and the second fuel chamber has the second bottom portion. (5) The fuel tank is an independently separated at least one fuel tank.
and a second fuel tank portion, the first fuel tank portion having the first bottom, and the second fuel tank portion having the second bottom. A fuel supply device for a vehicle according to claim 1 or 2. (6) The fuel supply system for a vehicle according to any one of claims 1 to 5, wherein the jet pump is disposed within the first bottom portion. (7) The jet pump includes an inlet communicating with the fuel return conduit, an outlet communicating with the first bottom, a nozzle section disposed between the inlet and the outlet, and a nozzle section disposed downstream of the nozzle section. Claims 1 to 6 have a bench lily portion that is made of air, and a suction port that is open adjacent to the nozzle portion and communicates with the second bottom portion. 2. The vehicle fuel supply device according to item 1.