JP2010071098A - Fuel supply device for fuel tank - Google Patents

Abstract

To provide a fuel supply device for a fuel tank capable of always smoothly and smoothly supplying fuel to an engine even when a lateral G is applied due to turning or the like while the vehicle is traveling.
A fuel supply apparatus A includes a fuel tank T whose inner lower portion is divided into a main tank portion Ta and a sub tank portion Tb, a fuel supply pump P1 for supplying fuel in the main tank portion Ta to an engine, And a pump module 1 installed in the fuel tank T. The pump module 1 stores fuel to be supplied to the engine and has a reservoir 2 in which a fuel supply pump P1 is provided, a reservoir lid 3 that closes an upper opening 21 of the reservoir 2, and fuel delivered from the fuel supply pump P1. A fuel supply pipe 41 to be sent out of the fuel tank T and an electric wire 5 connected to the fuel supply pump P1 are provided. The reservoir lid 3 is formed with an opening 31 through which the fuel supply pipe 41 and the electric wire 5 are inserted on the outer side in the vehicle width direction.
[Selection] Figure 1

Description

  The present invention relates to a fuel supply device for a fuel tank in which an inner lower portion of the fuel tank is divided into a main tank portion and a sub tank portion.

  Conventionally, in rear-wheel drive vehicles and four-wheel drive vehicles, a propeller shaft extends in the front-rear direction at the center of the vehicle body, and a saddle-shaped fuel tank formed so as to bypass and surround the upper side of the propeller shaft is used. (For example, refer to Patent Document 1).

In the vertical fuel tank described in Patent Document 1, the inner lower portion of the fuel tank has a main tank portion (main chamber) and a sub tank portion around a tunnel portion curved upward to avoid the propeller shaft. (Sub-chamber). In the vertical fuel tank, a fuel oil pump for sending fuel to the engine is installed in the main tank portion.
Japanese Patent Laying-Open No. 2004-324611 (paragraph 0011, FIG. 1)

  However, in the vertical fuel tank described in Patent Document 1, when centrifugal force or lateral acceleration (hereinafter referred to as “lateral G”) is applied due to turning or the like while the vehicle is running, The fuel in the main tank portion may move to the sub tank portion, and the amount of fuel in the main tank portion may be reduced. When the amount of fuel in the main tank portion is small and the lateral G is applied, the fuel in the main tank portion sways outward or inward in the vehicle width direction and the fuel level near the fuel intake port becomes the fuel intake port. When the pressure drops below, the fuel refueling pump sucks air in the fuel tank. For this reason, the vertical fuel tank has a problem that smooth fuel supply cannot be performed when a lateral G is applied when the liquid level of the fuel decreases.

Further, since the container-like reservoir described in Patent Document 1 extends to the ceiling surface of the fuel tank, when the fuel tank is high in the vertical direction, the reservoir must be enlarged in the vertical direction. There was a problem that the capacity decreased.
Further, in this case, since the reservoir is high in the vertical direction, it is difficult to perform the piping and electric wire routing work, so that the workability of the assembling work is poor and the cost is increased.

  Accordingly, the present invention has been invented to solve the above-mentioned problems, and is a fuel that can always smoothly supply fuel to the engine even when a lateral G is applied due to turning or the like while the vehicle is traveling. An object of the present invention is to provide a fuel supply device for a tank.

  In order to solve the above problems, a fuel supply device for a fuel tank according to claim 1, wherein an internal lower part is divided into a main tank part and a sub tank part, and fuel in the main tank part is sent to the engine. A fuel supply device for a fuel tank, comprising: a fuel supply pump that supplies fuel; and a pump module that includes the fuel supply pump and is installed in the fuel tank, wherein the pump module is installed in the fuel tank and the engine A container-like reservoir for storing the fuel to be supplied to the tank and having the fuel supply pump installed therein; a reservoir lid for closing an upper opening formed in the upper portion of the reservoir; and the fuel fed from the fuel supply pump A fuel supply pipe that feeds the fuel tank outside the fuel tank, and an electric wire connected to the fuel supply pump. Characterized in that an opening for inserting the fuel supply pipe and the wire were formed on one side near the vehicle width direction.

According to this configuration, the reservoir of the pump module is closed at the upper opening of the reservoir by the reservoir lid body in which the opening for inserting the fuel supply pipe and the electric wire is formed on the outer side in the vehicle width direction. For this reason, a fuel supply pipe for sending fuel from the fuel supply pump arranged in the reservoir to the outside of the fuel tank and an electric wire connected to the fuel supply pump are gathered, and from the inside of the reservoir lid to the outside through the opening. It can be pulled out and routed. As a result, it is possible to improve the workability of piping and electric wires and to easily arrange the piping and electric wires.
In addition, since the upper opening of the reservoir is closed by the reservoir lid, the fuel in the reservoir is offset in the vehicle width direction and the liquid level on the inner wall side rises when a lateral G is applied during running. Flowing out of the reservoir beyond the upper opening of the reservoir can be suppressed. As a result, it is possible to prevent the fuel in the reservoir from decreasing when receiving the lateral G.
In this way, when the amount of fuel in the reservoir is suppressed and the fuel in the entire fuel tank is reduced, even when the vehicle is driven by a lateral G during turning, etc., always The liquid level in the reservoir can be maintained and fuel can be smoothly supplied to the engine.

  The fuel supply device for a fuel tank according to claim 2 is the fuel supply device for a fuel tank according to claim 1, wherein the reservoir is a fuel for taking the fuel in the fuel tank into the reservoir. The suction port is provided on the same side as the opening in the vehicle width direction.

  According to such a configuration, the reservoir is provided with the fuel intake port for taking the fuel in the fuel tank into the reservoir toward the outside in the vehicle width direction, so that the lateral G is applied during traveling. In addition, the fuel close to the vehicle width direction outside in the fuel tank can be taken in from the fuel intake port. For this reason, even when the fuel flows out from the opening generated for inserting the pipe and the electric wire, the fuel in the reservoir is always maintained at an appropriate liquid level, and the fuel can be smoothly supplied to the engine. .

  A fuel supply apparatus for a fuel tank according to claim 3 is the fuel supply apparatus for a fuel tank according to claim 1 or 2, wherein a sub tank for taking in fuel in the sub tank section is provided in the sub tank section. The side suction filter is provided toward the outside in the vehicle width direction.

  According to such a configuration, the sub-side suction filter in the sub-tank portion is provided toward the outside in the vehicle width direction, so that when the lateral G in the sub-tank portion side is applied during traveling, the fuel in the sub-tank portion is It is possible to take in fuel that has approached the vehicle width direction outside from the fuel inlet. For this reason, even when the fuel in the fuel tank is reduced, the fuel in the sub tank can be transferred to the reservoir, and the fuel can be smoothly supplied to the engine.

  The fuel supply device for a fuel tank according to claim 4 is the fuel supply device for a fuel tank according to any one of claims 1 to 3, wherein the fuel in the reservoir is supplied to the reservoir. The fuel supply pump to which the main side first suction filter for taking in is connected, and the fuel transfer pump to which the main side second suction filter for taking in the fuel in the reservoir are connected, are provided inside the main pump. The side first suction filter is arranged in the vehicle front direction or the vehicle rear direction with respect to the main side second suction filter.

  According to such a configuration, the main side first suction filter is installed on the vehicle front side or the vehicle rear side with respect to the main side second suction filter. That is, the main side first suction filter and the main side second suction filter are arranged in a substantially symmetrical shape with respect to each other in the width direction axis of the vehicle. For this reason, the main side first suction filter and the main side second suction filter are configured such that when the vehicle is running and a lateral G is applied due to turning or the like, the fuel in the reservoir shakes to the left and right and the liquid level on the inner wall of the reservoir Even when moved up and down, an equal amount of fuel can be taken in from both the main-side first suction filter and the main-side second suction filter. As a result, even when the liquid level of the fuel in the sub-tank portion sways in response to the lateral G in the left-right direction, the amount of suction from the two pumps, the fuel supply pump and the fuel transfer pump, is made equal and the fuel smoothly Can be supplied to the engine.

  The fuel supply device for a fuel tank according to claim 5 is the fuel supply device for a fuel tank according to claim 4, wherein the fuel transfer pump is a fuel in a reservoir that is pumped by the power of the fuel transfer pump. A jet pump that obtains a pump action using the flow of the fuel is connected, and the fuel taken in from the sub-side suction filter is transferred into the reservoir through a fuel transfer pipe by the negative pressure of the jet pump. And

  According to this configuration, the fuel in the sub tank portion can be efficiently transferred to the main tank portion by the action of the jet pump.

  According to the fuel supply device for a fuel tank according to the present invention, fuel can be supplied smoothly and smoothly to the engine even when a lateral G is applied due to turning or the like while the vehicle is traveling.

With reference to FIGS. 1-6, an example of the fuel supply apparatus of the fuel tank which concerns on embodiment of this invention is demonstrated.
FIG. 1 is a schematic configuration diagram showing a fuel supply device for a fuel tank according to an embodiment of the present invention. FIG. 2 is a view showing a fuel supply device for a fuel tank according to an embodiment of the present invention, and is a bottom view of the fuel tank. FIG. 3 is a perspective view of a pump module, showing a fuel supply device for a fuel tank according to an embodiment of the present invention. FIG. 4 is a side view of the pump module with the reservoir removed. 5 is a cross-sectional view in the direction of arrow XX in FIG. FIG. 6 is a bottom view of the pump module when the reservoir is removed. Note that FIG. 1 shows the components arranged in the reservoir 2 by changing their arrangement positions in order to illustrate the components.
First, prior to describing the fuel supply device A of the fuel tank T of the present invention, a vehicle equipped with the fuel supply device A will be described.

≪Vehicle configuration≫
As shown in FIG. 1, the vehicle provided with the fuel tank T is, for example, a rear wheel drive vehicle or a four wheel drive vehicle, and a propeller shaft S extends in the front-rear direction at the center of the vehicle body. A fuel tank T that is long in the vehicle width direction is disposed between the propeller shaft S and the floor panel.

≪Configuration of fuel supply system≫
As shown in FIG. 1, the fuel supply device A is a device for supplying the fuel in the fuel tank T to, for example, an injector of an engine (not shown) outside the fuel tank T. The fuel supply device A includes a fuel tank T, a pump module 1, a flange 11, a reservoir 2, a reservoir lid 3, a fuel supply pump P1, a fuel transfer pump P2, a pipe 4, The electric wire 5, the suction filter 6, the jet pump 7, the pressure regulator 8, the filter F, etc. are comprised.

≪Fuel tank configuration≫
The fuel tank T is a tank for storing fuel, and is made of a resin tank-shaped tank. The fuel tank T is divided into a main tank portion Ta and a sub tank portion Tb around the center tunnel portion Tc. On the upper surface of the fuel tank T, a vapor return float 9 (see FIG. 2) incorporating a pump module 1 and a float valve (not shown) that closes when the tank is full, and a float valve (not shown) ), And a refueling float 10 (see FIG. 2). A filler pipe 45 (see FIG. 2) communicating with the fuel filler port is connected to the rear side of the fuel tank T. The fuel tank T is fixed to a vehicle body frame (not shown) such as a cross member by a metal band (not shown).

<Configuration of tunnel part, main tank part and sub tank part>
The tunnel portion Tc is a portion that is curved upward to avoid the propeller shaft S, and is formed in the center portion of the fuel tank T in the vehicle front-rear direction.
The main tank portion Ta is a portion serving as a main chamber in which the pump module 1 constituting the main part of the fuel supply device A is arranged and the fuel is stored.
The sub tank portion Tb is a portion that becomes a sub chamber of the fuel tank T. In the sub-tank portion Tb, a sub-side suction filter 61 for taking in fuel in the sub-tank portion Tb is provided outward in the vehicle width direction (see FIG. 2).

≪Pump module configuration≫
As shown in FIG. 1, the pump module 1 is a device in which main components of the fuel supply device A are unitized, and is installed in a fuel tank T. The pump module 1 includes a flange 11, a reservoir 2, a reservoir lid 3, a fuel supply pump P1, a fuel transfer pump P2, a fuel level gauge 13, a fuel supply pipe 41, an electric wire 5, and the like. Yes.

<Flange configuration>
The flange 11 is a disk-shaped member for fitting the pump module 1 into a module mounting port Td formed in the upper surface of the fuel tank T. The flange 11 is connected to the check valve V1 for preventing backflow provided on the upstream side of the fuel supply pipe 41, the coupler 12 in which the terminal connected to the electric wire 5 is disposed, and the flange 11 and the reservoir 2. And a connecting member 14 that holds the reservoir 2 suspended from the ceiling surface of the fuel tank T.

≪Reservoir configuration≫
As shown in FIG. 1, the reservoir 2 is a container-like member that is installed in the fuel tank T and stores fuel to be supplied to the engine, and a reserve tank when fuel in the fuel tank T outside the reservoir 2 is insufficient. It has the function of. The reservoir 2 includes a fuel supply pump P1, a fuel transfer pump P2, a main side first suction filter 62, a main side second suction filter 63, a first jet pump 71, a filter F, a pressure regulator 8, Is installed. A fuel inlet 22 for taking the fuel in the fuel tank T into the reservoir 2 is provided at the lower portion of the reservoir 2 so as to face outward in the vehicle width direction (see FIG. 2). The fuel inlet 22 is formed at the outer end of the second jet pump 72 in the vehicle width direction.

≪Reservoir cover configuration≫
As shown in FIGS. 3 and 5, the reservoir lid 3 is a lid member that closes the upper opening 21 formed in the upper portion of the reservoir 2, and is formed by insert molding a terminal or the like in a resin material. The reservoir lid 3 is formed with an opening 31, connector insertion portions 32 and 33, and a return tube insertion portion 34.

The opening 31 is a part through which the fuel supply pipe 41 and the electric wire 5 are inserted, and is formed on the outer side of the reservoir lid body 3 in the vehicle width direction. The reservoir lid 3 is fitted so that portions other than the opening 31 seal the upper opening 21 of the reservoir 2.
As shown in FIG. 5, the connector insertion portions 32 and 33 are portions to which the pump coupler portions P1a and P2a provided in the fuel supply pump P1 and the fuel transfer pump P2 are attached, and are integrally formed with the reservoir lid 3. It is made of a substantially rectangular tube.
The return tube insertion portion 34 is a portion for inserting one side of the return tube 43 that is curved in an inverted U shape, and is formed, for example, in a notch on the rear outer peripheral portion of the reservoir lid 3.

≪Configuration of fuel supply pump≫
As shown in FIG. 1, the fuel supply pump P1 is a motor pump that sucks up fuel in the main tank portion Ta from the main first suction filter 62 and supplies it to an injector (not shown) of the engine. The fuel supply pump P1 is covered with a pump case P (see FIG. 4) and is disposed so as to be immersed in the fuel in the reservoir 2. The fuel supply pump P1 has an upstream side connected to the main first suction filter 62 and a downstream side connected to the check valve V1 via the filter F and the fuel supply pipe 41.

≪Configuration of fuel transfer pump≫
The fuel transfer pump P2 is a motor pump that sucks the fuel in the main tank portion Ta from the main-side second suction filter 63 and generates a negative pressure for the first jet pump 71 to suck up the fuel in the sub tank portion Tb. . The fuel supply pump P1 is covered with a pump case P (see FIG. 4), and is arranged in line with the fuel supply pump P1 in the reservoir 2 so as to be immersed in the fuel in the reservoir 2. The fuel transfer pump P <b> 2 is connected to the main side second suction filter 63 on the upstream side and communicates with the reservoir 2 on the downstream side through the filter F, the return tube 43 and the first jet pump 71.

≪Configuration of pump case≫
As shown in FIG. 4, the pump case P covers and protects the fuel supply pump P1 and the fuel transfer pump P2, and also fixes the fuel supply pump P1 and the fuel transfer pump P2 to the reservoir lid 3 and the reservoir 2. It is a resin member. The pump coupler P is integrally formed with the pump coupler portions P1a and P2a, the elastic locking portion Pa, and the rattling prevention protrusion Pb.

The elastic locking portion Pa is a portion formed on the outer peripheral edge of the opening of the pump case P and engaged with the locking hole of the reservoir 2. The elastic locking portion Pa is made of, for example, an elastic piece with a locking claw that protrudes downward from the outer peripheral portion of the upper end of the pump case P.
The rattling prevention protrusion Pb is formed on the upper outer peripheral portion of the pump case P in the vertical direction and is assembled in contact with the inner wall of the reservoir 2 so that the pump case P prevents rattling against the reservoir 2. The rattling prevention protrusion Pb is formed of, for example, an elongated convex portion extending downward from the upper end portion of the pump case P.

≪Configuration of fuel level gauge≫
The fuel level gauge 13 shown in FIG. 3 is a device that detects the fuel level in the fuel tank T. The fuel level gauge 13 has a float 13a floating on the liquid level of the fuel, a movable platen 13b provided at the base end of the float 13a, and a pressure film resistor to which a slider provided on the movable platen 13b comes into sliding contact. The substrate 13c is configured to include a substrate 13c, an electrode plate 13d that holds the substrate 13c and is attached to the level gauge holder 23 of the reservoir 2, and a lead wire 51 connected to the substrate 13c.

≪Piping configuration≫
As shown in FIG. 1, the pipe 4 sucks the fuel in the fuel tank T from the suction filter 6 and sends it out of the fuel tank T via the fuel supply pump P1, the fuel transfer pump P2, and the jet pump 7. It is a tube. The pipe 4 includes a fuel supply pipe 41, a fuel transfer pipe 42, a return tube 43, a fuel suction pipe 44, and the like.

<Configuration of fuel supply piping>
The fuel supply pipe 41 is a feed tube for sucking the fuel in the reservoir 2 from the main first suction filter 62 by the power of the fuel supply pump P1 and sending it out of the fuel tank T. The fuel supply pipe 41 is connected to the injector (not shown) of the engine through the fuel supply pump P1, the filter F, and the check valve V1 from the main side first suction filter 62.

<Configuration of fuel transfer piping>
The fuel transfer pipe 42 is a tube for sending the fuel in the sub tank portion Tb to the first jet pump 71 on the main tank portion Ta side.
The return tube 43 is a tube for sending the fuel of the fuel transfer pump P2 to the first jet pump 71.

<Configuration of fuel intake piping>
The fuel suction pipe 44 is a flow path for sending the fuel in the main tank portion Ta to the second jet pump 72 by the discharge force of the fuel supply pump P1.

≪Construction of electric wire≫
As shown in FIG. 1, the electric wire 5 includes a fuel supply pump P <b> 1 and a fuel transfer pump P <b> 2 provided in the reservoir 2, and a fuel level gauge 13 installed on the upper outer surface of the reservoir 2. It is for electrically connecting to. The electric wire 5 (harness 52 (see FIG. 4)) connected to the fuel supply pump P1 and the fuel transfer pump P2 is connected from the reservoir 2 to the terminal of the coupler 12 of the flange 11 through the opening 31 of the reservoir lid 3. Yes. The electric wire 5 (lead wire 51 (see FIGS. 3 and 5)) connected to the fuel level gauge 13 is connected to the terminal of the coupler 12 from the liquid level gauge holder 23 (see FIG. 3) adjacent to the outside of the opening 31. Connected to.

≪Suction filter configuration≫
As shown in FIG. 1, the suction filter 6 removes foreign matter in the fuel with a nonwoven fabric when the fuel is sucked by the suction force of the fuel supply pump P1, the fuel transfer pump P2, and the jet pump 7. In the fuel tank T, three suction filters 6 including a sub-side suction filter 61, a main-side first suction filter 62, and a main-side second suction filter 63 are provided.

<Sub-side suction filter configuration>
As shown in FIG. 2, the sub-side suction filter 61 has a fuel intake port (not shown) arranged on the inner bottom of the sub-tank portion Tb so as to face the outside in the vehicle width direction, and is connected to the fuel transfer pipe 42. . The sub-side suction filter 61 is provided in a state of being hung from the ceiling surface of the fuel tank T by a flange-shaped support member 61 a mounted on the upper surface of the fuel tank T. As shown in FIG. 1, the fuel taken in from the sub-side suction filter 61 is transferred into the reservoir 2 through the fuel transfer pipe 42 by the negative pressure of the first jet pump 71.

<Configuration of Main Side First Suction Filter and Main Side Second Suction Filter>
The main side first suction filter 62 and the main side second suction filter 63 are filter members having fuel intake ports for taking in the fuel in the reservoir 2. The main first suction filter 62 is arranged adjacent to the main second suction filter 63 in a position in the vehicle front direction or the vehicle rear direction (see FIGS. 4 and 6).

<Configuration of pump holder>
As shown in FIG. 4, the pump holder 64 is a member for attaching the main side first suction filter 62 and the main side second suction filter 63 to the pump case P. As for the pump holder 64, the connection pipe 64a and the latching piece 64b are integrally formed.
The connection pipe 64a is a pipe for sending the fuel taken from the main side first suction filter 62 and the main side second suction filter 63 to the fuel supply pump P1 and the fuel transfer pump P2, respectively.
The locking pieces 64 b are elastic tongue pieces for mounting the pump holder 64 to the pump case P, and a plurality of locking pieces 64 b are formed on the upper outer peripheral portion of the pump holder 64 in the upward direction.

≪Jet pump configuration≫
As shown in FIG. 1, the jet pump 7 is a device that generates a negative pressure by the fuel pumped by the pump and performs a pumping action of sucking and feeding the fuel. In the fuel tank T, two jet pumps, that is, a first jet pump 71 provided in the reservoir 2 and a second jet pump 72 provided outside the reservoir 2 are provided.
The first jet pump 71 is a pump that sucks fuel using the fuel pumped by driving the fuel transfer pump P2. The first jet pump 71 communicates with the fuel transfer pipe 42 connected to the sub-side suction filter 61, the return tube 43 connected to the fuel transfer pump P 2 via the pressure regulator 8 and the filter F, and the reservoir 2. The discharge pipe 46 to be connected is connected.
The second jet pump 72 uses the negative pressure due to the flow of fuel in the reservoir 2 that is pumped by the power of the fuel supply pump P1, and sucks the fuel in the main tank portion Ta from the fuel intake port 22 to cause the reservoir 2 It is a pump for sending in. The second jet pump 72 has an upstream side connected to the fuel inlet 22 and a downstream side connected to the fuel inlet 22 of the reservoir 2.

≪Configuration of filter F and pressure regulator≫
The filter F is a filter that purifies the fuel sent from the fuel supply pump P1 and the fuel transfer pump P2.
The pressure regulator 8 is a device that adjusts the pressure of the fuel. The upstream side is connected to the filter F, and the downstream side is connected to the second jet pump 72.

≪Operation of fuel supply system≫
Next, the operation of the fuel supply device A for the fuel tank T according to the embodiment of the present invention will be described with reference to FIGS.

  As shown in FIGS. 3 and 5, the pump module 1 has a reservoir lid in which an opening 31 through which the reservoir 2 passes the fuel supply pipe 41 and the electric wire 5 is formed on the outer side in the vehicle width direction (left side in this embodiment). The body 3 closes the upper opening 21 of the reservoir 2. For this reason, the fuel supply pipe 41 routed from the inside of the reservoir 2 to the outside of the fuel tank T, the electric wire 5 connected to the fuel level gauge 13 provided in the reservoir 2 and the like are gathered in the opening 31 so that the reservoir The lid 3 can be routed from the inside through the opening 31 to the outside.

  The reservoir lid 3 can be fitted with the pump couplers P1a and P2a of the fuel supply pump P1 and the fuel transfer pump P2 in the reservoir 2 so as to protrude upward from the surface of the reservoir lid 3. The connection connectors 53 and 54 can be connected to the fuel supply pump P1 and the fuel transfer pump P2 by being attached to the pump couplers P1a and P2a. For this reason, the workability | operativity of the wiring work of the piping 4 and the electric wire 5 is improved, and it becomes possible to wire the piping 4 and the electric wire 5 easily now.

  Further, as shown in FIG. 1, the vehicle makes a turn or the like while traveling, so that a lateral G is applied to the fuel in the fuel tank T. For example, when the vehicle turns to the left, the fuel in the fuel tank T has a lateral G (arrow G1) in the right direction. At this time, since the sub-side suction filter 61 in the sub-tank portion Tb is provided outward in the vehicle width direction, the vehicle width in the sub-tank portion Tb can be obtained even when the lateral G in the sub-tank portion Tb side direction is applied. The fuel approaching the outside in the direction can be taken in from the fuel intake port. Therefore, the fuel in the sub-tank portion Tb can be sucked from the sub-side suction filter 61 and transferred from the discharge pipe 46 into the reservoir 2 via the fuel transfer pipe 42 and the first jet pump 71. Even when the fuel in the fuel tank T is reduced, the fuel in the sub-tank portion Tb can be transferred into the reservoir 2 and collected in the reservoir 2. As a result, the liquid level of the fuel in the reservoir 2 can always be maintained in an appropriate state, and the fuel can be smoothly supplied to the engine by the fuel supply pump P1.

  Further, the reservoir 2 is closed by the reservoir lid 3 at the right side in the vehicle width direction of the upper opening 21, so that a lateral G is applied while the vehicle is running, so that the fuel in the reservoir 2 is on the right side in the vehicle width direction. The reservoir lid 3 can prevent the fuel in the reservoir 2 from spilling out of the reservoir 2 beyond the upper opening 21 of the reservoir 2 when the liquid level on the inner wall side rises. . As a result, when the fuel in the reservoir 2 receives the lateral G, it can be prevented from decreasing.

  In particular, when the lateral G is received on the sub-tank portion Tb side, in the upper opening 21 of the reservoir 2, the opening 31 of the reservoir lid 3 is disposed at a position opposite to the sub-tank portion Tb. This prevents the fuel from spilling out of the reservoir 2 from the opening 31 and maintains the fuel level at a desired level.

  In this way, the fuel supply device A suppresses the decrease in the amount of fuel in the reservoir 2, and when the fuel in the entire fuel tank T has decreased, the fuel supply device A can turn laterally while turning the vehicle while traveling. Even when the fuel is applied, the liquid level in the reservoir 2 can always be maintained and the fuel can be smoothly supplied to the engine.

  As shown in FIGS. 4 and 5, the main first suction filter 62 and the main second suction filter 63 are disposed in the reservoir 2 in the vehicle front direction and the vehicle rear direction. . For this reason, even when the vehicle is driven by a lateral G due to turning or the like, even if the fuel in the reservoir 2 sways left and right and the liquid level on the inner wall side of the reservoir 2 rises, the main side first suction filter An equal amount of fuel can be taken in from both the taken-in fuel and the main-side second suction filter.

  As described above, the fuel supply device for a fuel tank according to the present invention desires the liquid level of the fuel in the reservoir 2 by transferring the fuel in the sub-tank portion Tb to the reservoir 2 when the lateral G in the horizontal direction is applied to the fuel. It is possible to support the fuel at the height of the left and right sides of the reservoir 2 and to take in an equal amount of fuel from the main side first suction filter 62 and the main side second suction filter 63. For this reason, even when the fuel in the fuel tank T decreases, the amount of suction of the fuel supply pump P1 and the fuel transfer pump P2 can be maintained evenly, and the fuel can be smoothly supplied to the engine.

≪Modification≫
The present invention is not limited to the above-described embodiment, and various modifications and changes can be made within the scope of the technical idea. The present invention extends to these modifications and changes. Of course.

In the said embodiment, the pump module 1 should just be provided with the reservoir | reserver 2 and the reservoir | reserver lid | cover 3, and you may change another component suitably.
For example, the first jet pump 71 and the second jet pump 72 may be electric pumps.

It is a schematic block diagram which shows the fuel supply apparatus of the fuel tank which concerns on embodiment of this invention. It is a figure which shows the fuel supply apparatus of the fuel tank which concerns on embodiment of this invention, and is a bottom view of a fuel tank. It is a figure which shows the fuel supply apparatus of the fuel tank which concerns on embodiment of this invention, and is a perspective view of a pump module. It is a side view of the pump module which removed the reservoir. FIG. 4 is a cross-sectional view in the direction of arrow XX in FIG. 3. It is a bottom view of a pump module when a reservoir is removed.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Pump module 2 Reservoir 3 Reservoir cover body 4 Piping 5 Electric wire 6 Suction filter 7 Jet pump 21 Upper opening 22 Fuel inlet 31 Opening part 41 Fuel supply piping 42 Fuel transfer piping 61 Sub side suction filter 62 Main side 1st suction filter 63 Main side second suction filter 71 First jet pump (jet pump)
72 2nd jet pump A Fuel supply device P Pump case P1 Fuel supply pump P2 Fuel transfer pump T Fuel tank Ta Main tank part Tb Sub tank part

Claims (5)

A fuel tank whose inner lower part is divided into a main tank part and a sub tank part;
A fuel supply pump for supplying fuel in the main tank to the engine;
A fuel supply device for a fuel tank comprising the fuel supply pump and a pump module installed in the fuel tank,
The pump module
A container-like reservoir installed in the fuel tank, storing the fuel supplied to the engine, and having the fuel supply pump installed therein;
A reservoir lid that closes an upper opening formed in the upper part of the reservoir;
A fuel supply pipe for sending the fuel delivered from the fuel supply pump out of the fuel tank;
An electric wire connected to the fuel supply pump,
The fuel supply device for a fuel tank, wherein the reservoir lid has an opening for inserting the fuel supply pipe and the electric wire on one side in a vehicle width direction.   2. The fuel according to claim 1, wherein the reservoir has a fuel inlet for taking the fuel in the fuel tank into the reservoir on the same side as the opening in the vehicle width direction. Tank fuel supply device.   3. The fuel tank according to claim 1, wherein a sub-side suction filter for taking in fuel in the sub-tank portion is provided in the sub-tank portion toward the outside in the vehicle width direction. Fuel supply device. The fuel supply pump to which the main side first suction filter for taking in the fuel in the reservoir is connected to the reservoir;
A fuel transfer pump connected to the main second suction filter for taking in the fuel in the reservoir;
The said main side 1st suction filter is arrange | positioned with respect to the said main side 2nd suction filter in the vehicle front direction or a vehicle rear direction, The any one of Claim 1 thru | or 3 characterized by the above-mentioned. A fuel supply device for the fuel tank as described. The fuel transfer pump is connected to a jet pump that obtains a pump action using the flow of fuel in a reservoir that is pumped by the power of the fuel transfer pump,
The fuel supply device for a fuel tank according to claim 4, wherein the fuel taken in from the sub-side suction filter is transferred into the reservoir through a fuel transfer pipe by a negative pressure of the jet pump.

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