JP5485929B2 - Fuel supply device - Google Patents

Description

  The present invention relates to a fuel supply device that supplies evaporated fuel to an internal combustion engine.

  Conventionally, evaporative fuel is supplied to an engine in order to reduce emissions such as particulate matter (hereinafter referred to as “PM”) and unburned hydrocarbons (hereinafter referred to as “HC”) in exhaust. It is. For example, in Patent Document 1, a porous body such as activated carbon is used, liquid fuel is trapped, and evaporated fuel is supplied to the engine.

JP 2005-120902 A

However, in Patent Document 1, the fuel injected to the lower side of the porous body is configured to be supplied from the upper space portion to the intake side of the engine via the porous body. Is hard to fall down. In particular, when the fuel flow is fast, high-boiling components that are not vaporized are supplied to the engine side, which may increase emissions.
The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a fuel supply device capable of reducing emissions in exhaust gas.

  According to a first aspect of the present invention, a fuel supply device includes a fuel tank, a pump unit, a first injection valve, an evaporative fuel storage tank, a second injection valve, and an evaporative fuel passage member. The fuel tank stores fuel. The pump unit pumps fuel stored in the fuel tank. The first injection valve injects the fuel pumped by the pump unit into the combustion chamber or the intake passage of the internal combustion engine. The evaporative fuel storage tank includes a filter member, an evaporative fuel supply unit, and an agglomerated fuel discharge unit. The filter member partitions the internal space into a first chamber formed on the upper side in the vertical direction and a second chamber formed on the lower side in the vertical direction of the first chamber. The evaporative fuel supply unit supplies evaporative fuel from the second chamber to the internal combustion engine side. The agglomerated fuel discharge unit discharges agglomerated fuel that is agglomerated liquid fuel from the lower side in the vertical direction of the second chamber. The second injection valve injects the fuel pumped by the pump unit into the first chamber. The evaporative fuel passage member communicates with the evaporative fuel supply unit and has an evaporative fuel passage that supplies the evaporative fuel from the second chamber to the internal combustion engine.

  In the present invention, when fuel is injected from the second injection valve into the first chamber formed on the upper side in the vertical direction, the low boiling point component in the fuel is vaporized to become evaporated fuel, and the high boiling point component is in a liquid state. The mist is atomized as it is. The evaporated fuel composed of the low boiling point component passes through the filter member, moves to the second chamber, and is supplied from the evaporated fuel supply unit to the internal combustion engine via the evaporated fuel passage. On the other hand, the mist composed of the high boiling point component aggregates while flowing through the filter member from the upper side to the lower side in the vertical direction. Discharged from the agglomerated fuel discharge section. That is, in the present invention, the fuel injected from the second injection valve is configured to flow through the filter member from the upper side to the lower side in the vertical direction. The component and the high boiling point component can be separated. As a result, mist mixing into the evaporated fuel supplied to the internal combustion engine is suppressed, so that the evaporated fuel composed of low-boiling components can be efficiently supplied to the internal combustion engine, reducing emissions of PM and the like. can do. Hereinafter, the mist composed of a high-boiling component and the agglomerated fuel that is a droplet in which the mist is agglomerated are simply referred to as “mist” as appropriate.

In the invention described in claim 2, the evaporated fuel storage tank has a wall portion formed in the second chamber and on the upper side in the vertical direction of the evaporated fuel supply portion. Thereby, it can prevent that the mist dripped from the filter member flows into the evaporative fuel supply part side.
In the invention according to claim 3, the wall portion is provided so as to be inclined so that the agglomerated fuel discharge portion side is downward. Thereby, the mist dripped at the wall portion can be easily discharged from the aggregated fuel discharge portion.

According to a fourth aspect of the present invention, the evaporated fuel supply section is formed on the side wall of the evaporated fuel storage tank. Thereby, it can prevent that the mist dripped from the filter member flows into the evaporative fuel supply part side.
In the invention described in claim 5, the fuel vapor storage tank has a protruding chamber that protrudes to one side in the horizontal direction from the filter member and forms a part of the second chamber. The evaporative fuel supply unit is formed above the protruding chamber in the vertical direction. Thereby, it can prevent that the mist dripped from the filter member flows into the evaporative fuel supply part side.

In the invention according to claim 6, the filter member is provided horizontally. Thereby, since fuel flows through the filter member from the upper side to the lower side in the vertical direction, the mist can be efficiently aggregated by the filter member.
In the invention according to claim 7, the filter member is provided to be inclined with respect to the horizontal direction. Thereby, fuel flows through the filter member from the upper side in the vertical direction to cause the mist to efficiently agglomerate in the filter member. Mist can be dripped from a location.

  In the invention according to claim 8, the agglomerated fuel discharge part is formed offset from the center of the bottom wall of the evaporated fuel storage tank. The filter member is provided so as to be inclined so that the agglomerated fuel discharge portion side is downward. As a result, the mist dropped from the lower surface of the inclined filter member and from the lower portion in the vertical direction can be easily discharged from the agglomerated fuel discharge part. Can be prevented from flowing into the side.

  In the invention according to claim 9, the filter member is formed of a lipophilic material. As a result, the mist can be selectively trapped and aggregated and dropped by the filter member, so that the trapping ability is reduced due to clogging of the pores as in the case of using a porous material such as activated carbon. Therefore, a high resolution can be maintained.

  In a tenth aspect of the present invention, the vehicle further includes a canister that communicates with the second chamber and can store the evaporated fuel. Thereby, surplus evaporative fuel can be stored. Further, by supplying the evaporated fuel stored in the canister to the second chamber, the evaporated fuel concentration in the second chamber can be increased.

In the invention described in claim 11, the evaporated fuel storage tank is provided in contact with the engine block of the internal combustion engine. As a result, the evaporated fuel storage tank is heated by the heat of the engine block, and the generation of evaporated fuel in the evaporated fuel storage tank is promoted.
The invention according to claim 12 further includes a temperature sensor for detecting the temperature of the evaporated fuel storage tank. Thereby, the concentration of the evaporated fuel in the evaporated fuel storage tank can be estimated, and the purge valve and the like can be appropriately controlled.

It is a schematic block diagram which shows the fuel supply apparatus by 1st Embodiment of this invention. It is a schematic diagram explaining a mode that mist passes a filter member, Comprising: (a) is a schematic diagram explaining a mode that mist moves from the vertical direction upper side to a lower side, (b) is from a vertical direction lower side. It is a schematic diagram explaining a mode that mist moves to the upper side. It is typical sectional drawing of the evaporative fuel storage tank by 2nd Embodiment of this invention. It is typical sectional drawing of the evaporative fuel storage tank by 3rd Embodiment of this invention. It is typical sectional drawing of the evaporative fuel storage tank by 4th Embodiment of this invention.

Hereinafter, a fuel supply device according to the present invention will be described with reference to the drawings. Hereinafter, in a plurality of embodiments, substantially the same configuration is denoted by the same reference numeral, and description thereof is omitted.
(First embodiment)
A fuel supply apparatus according to a first embodiment of the present invention is shown in FIG. The fuel supply device 1 is applied to an in-cylinder direct injection four-cylinder gasoline engine mounted on a vehicle. In FIG. 1, only one cylinder is shown, and the other cylinders are omitted. The number of cylinders is not limited to four.

The fuel supply device 1 supplies fuel to an engine 10 as an internal combustion engine.
The engine 10 includes a cylinder block 11, a cylinder head 12, a piston 13, a spark plug 14, and the like. In the present embodiment, the cylinder block 11 and the cylinder head 12 correspond to an “engine block”.
The cylinder block 11 has a cylinder 18 formed in a cylindrical shape, and accommodates the piston 13 so as to be able to reciprocate inside the cylinder 18. The piston 13 is connected to the crankshaft via a connecting rod (not shown).

  The cylinder head 12 is formed with an intake port 22 through which intake air flows and an exhaust port 27 through which exhaust gas generated by combustion flows. The intake port 22 communicates with an intake passage 29 of the intake pipe 28, and the exhaust port 27 communicates with an exhaust passage of an exhaust pipe (not shown). The intake port 22 and the intake passage 29 correspond to an “intake passage”. The intake pipe 28 is provided with an air cleaner 23 and a throttle 24. The air cleaner 23 removes foreign matter in the air sucked into the combustion chamber 19. The throttle 24 adjusts the flow rate of intake air taken into the combustion chamber 19 by opening and closing the intake passage 29.

The cylinder head 12 is provided with an intake valve 21 that opens and closes between the intake port 22 and the combustion chamber 19, and an exhaust valve 26 that opens and closes between the exhaust port 27 and the combustion chamber 19. The combustion chamber 19 is defined by the cylinder 18 of the cylinder block 11, the cylinder head 12, the top surface of the piston 13, the intake valve 21, and the exhaust valve 26, and communicates with the intake port 22 by opening the intake valve 21. When the exhaust valve 26 is opened, it communicates with the exhaust port 27.
The spark plug 14 sparks the fuel mixture introduced into the combustion chamber 19 when a high voltage for spark discharge is applied according to a command from an electronic control unit (hereinafter referred to as “ECU”) 100 described later. Ignite.

  The fuel supply device 1 that supplies fuel to the combustion chamber 19 of the engine 10 includes a fuel tank 30, a low-pressure pump 33, a high-pressure pump 34, a main injector 40 as a first injection valve, and a sub-injector 42 as a second injection valve. The evaporative fuel storage tank 50, the evaporative fuel passage member 70, the purge valve 75, the return passage member 80, the canister 94, the ECU 100, and the like are provided.

  Fuel is stored in the fuel tank 30. The fuel in this embodiment is gasoline. The low pressure pump 33 pumps up the fuel stored in the fuel tank 30 and supplies the fuel to the high pressure pump 34 via the fuel passage 37 formed in the fuel passage member 36. The high pressure pump 34 pressurizes the fuel supplied by the low pressure pump 33 and supplies the pressurized fuel to the main injector 40. The main injector 40 injects fuel supplied from the high-pressure pump 34 into the combustion chamber 19.

  A branch passage member 38 that branches from the fuel passage member 36 is provided between the low pressure pump 33 and the high pressure pump 34. A branch passage 39 is formed in the branch passage member 38, and the branch passage 39 communicates with the fuel passage 37. Part of the fuel pumped up from the fuel tank 30 by the low-pressure pump 33 is supplied to the sub-injector 42 via the branch passage 39. That is, the sub-injector 42 is supplied with fuel having a lower pressure than the main injector 40. In the present embodiment, the low pressure pump 33 and the high pressure pump 34 correspond to a “pump unit”.

  The evaporated fuel storage tank 50 that is a pressure vessel is formed in a substantially cylindrical shape and includes a top wall 51, a bottom wall 52, and a side wall 53. The evaporative fuel storage tank 50 has a filter member 55 formed in the horizontal direction in the internal space of the evaporative fuel storage tank 50. The filter member 55 is formed of, for example, a lipophilic material such as synthetic resin (plastic), and the internal space of the evaporated fuel storage tank 50 is divided into a first chamber 61 on the upper side in the vertical direction and a second chamber 62 on the lower side in the vertical direction. Partition. That is, the first chamber 61 is formed on the top wall 51 side of the filter member 55, and the second chamber 62 is formed on the bottom wall 52 side.

  The evaporative fuel storage tank 50 is provided such that one side of the side wall 53 is in contact with the cylinder block 11, and a sub-injector 42 is provided on the side facing the side in contact with the cylinder block 11. The sub-injector 42 is provided above the filter member 55 in the vertical direction so that fuel can be injected into the first chamber 61.

The bottom wall 52 has an evaporated fuel supply unit 57 that supplies evaporated fuel, which is a vaporized low boiling point component of the fuel injected from the sub-injector 42, to the engine 10 side, and of the fuel injected from the sub-injector 42. An agglomerated fuel discharge portion 59 is formed that discharges agglomerated fuel (mist), which is a liquid fuel agglomerated without vaporization, to the outside of the evaporated fuel storage tank 50. The evaporated fuel supply part 57 and the aggregated fuel discharge part 59 are formed so as to be offset from the center of the bottom wall 52. Further, in the second chamber 62, on the upper side in the vertical direction of the evaporated fuel supply portion 57, a wall portion that covers the opening of the evaporated fuel supply portion 57 in order to prevent inflow of mist to the evaporated fuel supply portion 57 side. 58 is provided. The wall portion 58 is provided so as to be inclined so that the agglomerated fuel discharge portion 59 side is downward.
Further, the evaporated fuel storage tank 50 is provided with a temperature sensor 101 for detecting the internal temperature and a pressure sensor (not shown) for detecting the internal pressure. In the present embodiment, the temperature sensor 101 and the pressure sensor are provided on the second chamber 62 side.

An evaporated fuel passage 71 is formed in the evaporated fuel passage member 70. The evaporated fuel passage 71 communicates with the second chamber 62 via the evaporated fuel supply part 57. The evaporated fuel passage 71 communicates with the intake port 22. As a result, the evaporated fuel in the second chamber 61 in the evaporated fuel storage tank 50 passes through the evaporated fuel supply portion 57, the evaporated fuel passage 71, the intake port 22, and the intake valve 21, and then the combustion chamber 19 of the engine 10. Supplied to. The evaporative fuel passage member 70 is provided with a purge valve 75 that opens and closes the evaporative fuel passage 71. The purge valve 75 is controlled to be opened and closed by the ECU 100 and is opened at the timing of engine start. Note that the purge valve 75 may be provided for each cylinder, or one may be provided at a location communicating with each cylinder.
If the distance of the evaporated fuel passage 71 is long, there will be a time delay in supplying the evaporated fuel from the evaporated fuel storage tank 50 to the intake port 22. Therefore, the evaporated fuel passage 71 is formed to be as short as possible. It is preferable.

  A return passage 81 is formed in the return passage member 80. The return passage 81 communicates with the second chamber 62 via the aggregated fuel discharge part 59. Further, the return passage 81 communicates with the fuel tank 30. Thus, the mist dropped from the filter member 55 to the second chamber 62 in the evaporated fuel storage tank 50 is returned to the fuel tank 30 via the aggregated fuel discharge portion 59 and the return passage 81. The return passage member 80 is provided with a relief valve 85 that opens and closes the return passage 81. The relief valve 85 is controlled to be opened and closed by the ECU 100.

A canister passage 91 is formed in the canister passage member 90. The canister passage 91 communicates the second chamber 62 of the fuel vapor storage tank 50 and the canister 94. The canister passage member 90 is provided with a canister valve 92 that opens and closes the canister passage 91. The opening and closing of the canister valve 92 is controlled by the ECU 100.
A passage 97 is formed in the passage member 96. The passage 97 communicates the upper space of the fuel tank 30 and the canister 94.

  The canister 94 has an adsorbing member such as activated carbon. Since the canister 94 communicates with the upper space of the fuel tank 30 via the passage 97, the evaporated fuel generated by the evaporation of the fuel in the fuel tank 30 is stored. Further, since the canister 94 communicates with the second chamber 62 of the evaporated fuel storage tank 50 via the canister passage 91, excess evaporated fuel in the second chamber 62 is stored. The evaporated fuel stored in the canister 94 is supplied to the second chamber 62 of the evaporated fuel storage tank 50 via the canister passage 91 as necessary. By supplying the evaporated fuel from the canister 94 to the second chamber 62, the concentration of the evaporated fuel in the second chamber 62 increases.

  The ECU 100 includes a normal microcomputer, a CPU that performs various control processes and arithmetic processes, a memory for storing various programs and data, an input circuit, an output circuit, a power supply circuit, a bus line that connects them, and the like have. ECU 100 receives detection signals such as the accelerator opening and the engine speed from various sensors (not shown). Further, the ECU 100 receives signals from a temperature sensor 101 and a pressure sensor provided in the evaporated fuel storage tank 50, and acquires the temperature and pressure in the evaporated fuel storage tank 50, particularly the second chamber 61. The ECU 100 controls the fuel injection from the main injector 40 and the sub-injector 42, the opening / closing of the purge valve 75, the relief valve 85, the canister valve 92, and the like using these various pieces of input information. In FIG. 1, the control lines other than the control line to the sub-injector 42 are omitted to avoid complication.

Here, the behavior of the fuel in the evaporated fuel storage tank 50 will be described.
The fuel injected from the sub-injector 42 into the first chamber 61 of the evaporated fuel storage tank 50 mainly vaporizes low boiling point components to become evaporated fuel, and mainly droplets that are atomized without vaporizing high boiling point components. (Mist).

  The evaporated fuel passes through the filter member 55 and moves to the second chamber 62, and passes through the evaporated fuel supply portion 57, the evaporated fuel passage 71, the intake port 22, and the intake valve 21 to the combustion chamber 19 of the engine 10. Supplied. On the other hand, as shown by arrow Y1 in FIG. 2A, mist (indicated by symbol M in FIG. 2) aggregates in the process of passing through the inside of the filter member 55 from the upper side to the lower side in the vertical direction. Then, it is dropped into the second chamber 62 from the lower surface of the filter member 55 in the vertical direction. The mist dropped from the filter member 55 to the second chamber 62 is discharged from the agglomerated fuel discharge portion 59 formed on the bottom wall 52 to the outside of the evaporated fuel storage tank 50. In the present embodiment, the mist discharged from the evaporated fuel storage tank 50 is returned to the fuel tank 30 via the return passage 81 and the relief valve 85. Thereby, the mist which is a high boiling point component in the fuel injected from the sub injector 42 can be separated from the evaporated fuel.

  In the present embodiment, since the wall portion 58 that covers the opening is provided on the upper side in the vertical direction of the evaporated fuel supply portion 57, the mist dropped from the filter member 55 flows into the evaporated fuel supply portion 57 side. do not do. Thus, only the evaporated fuel from which the mist has been separated is supplied from the evaporated fuel supply unit 57 to the engine 10 side.

  In the reference example shown in FIG. 2B, it is assumed that the fuel supplied to the lower side in the vertical direction of the filter member 155 is supplied to the engine from the upper side in the vertical direction. In this case, as indicated by the arrow Y2, the mist M moves from the lower side in the vertical direction of the filter member 155 to the upper side. In the reference example, when the fuel flow from the lower side to the upper side in the vertical direction is slow, the mist M stays in the filter member 155, and when the fuel flow is fast, the mist M stays in the upper part of the filter member 155. End up. Therefore, the mist M cannot be dripped efficiently, and the collection ability is reduced. Moreover, if the mist M staying at the upper part of the filter member 155 is redivided and supplied to the engine side together with the evaporated fuel, the emission is deteriorated.

  As described above in detail, the fuel supply device 1 includes the fuel tank 30, the low pressure pump 33, the high pressure pump 34, the main injector 40, the evaporated fuel storage tank 50, the sub injector 42, and the evaporated fuel passage member 70. And comprising. The fuel tank 30 stores fuel. The low pressure pump 33 and the high pressure pump 34 pump the fuel stored in the fuel tank 30. The main injector 40 injects fuel pumped by the low pressure pump 33 and the high pressure pump 34 into the combustion chamber 19 of the engine 10. The evaporated fuel storage tank 50 includes a filter member 55, an evaporated fuel supply unit 57, and an agglomerated fuel discharge unit 59. The filter member 55 partitions the internal space of the evaporated fuel storage tank 50 into a first chamber 61 formed on the upper side in the vertical direction and a second chamber 62 formed on the lower side in the vertical direction of the first chamber 61. The evaporated fuel supply unit 57 supplies evaporated fuel from the second chamber 62 to the engine 10 side. The agglomerated fuel discharge unit 59 discharges agglomerated fuel (mist), which is agglomerated liquid fuel, from the lower side in the vertical direction of the second chamber 62. The sub-injector 42 injects the fuel pumped by the low pressure pump 33 into the first chamber 61. The evaporated fuel passage member 70 has an evaporated fuel passage 71 that communicates with the evaporated fuel supply unit 57 and supplies evaporated fuel from the second chamber 62 to the engine 10.

Thereby, there exist the following effects.
(1) In this embodiment, when the fuel is injected from the sub-injector 42 into the first chamber 61 formed on the upper side in the vertical direction, the low boiling point component in the fuel is vaporized to become evaporated fuel, and the high boiling point component is liquid. It becomes the mist atomized in the state of. The evaporated fuel composed of the low boiling point component passes through the filter member 55 and moves to the second chamber 62, and combusts in the engine 10 from the evaporated fuel supply unit 57 via the evaporated fuel passage 71, the intake port 22 and the intake valve 21. It is supplied to the chamber 19.

  On the other hand, the mist composed of the high boiling point component aggregates while flowing through the filter member 55 from the upper side to the lower side in the vertical direction, drops as a droplet on the lower surface of the filter member 55, and drops into the second chamber 62. The fuel is discharged from the agglomerated fuel discharge portion 59 formed on the side to the fuel tank 30 via the return passage 81. That is, in the present embodiment, the fuel injected from the sub-injector 42 is configured to flow through the filter member 55 from the upper side to the lower side in the vertical direction. Boiling components and high boiling components can be separated. Thereby, since mixing of mist in the evaporated fuel supplied to the engine 10 side is suppressed, the evaporated fuel composed of a low boiling point component can be efficiently supplied to the engine 10 side, and emissions such as PM can be reduced. it can.

(2) The evaporated fuel storage tank 50 has a wall portion 58 formed in the second chamber 62 and on the upper side in the vertical direction of the evaporated fuel supply portion 57. Thereby, it is possible to prevent the mist dropped from the filter member 55 from flowing into the evaporated fuel supply unit 57 side.
(3) Moreover, the wall part 58 is inclined and provided so that the aggregated fuel discharge part 59 side may become down. Thereby, the mist dropped on the wall portion 58 can be easily discharged from the aggregated fuel discharge portion 59.

  (4) In this embodiment, the filter member 55 is provided horizontally. Thereby, since the mist flows through the filter member 55 from the upper side to the lower side in the vertical direction, the mist can be efficiently aggregated by the filter member 55.

  (5) The filter member 55 is formed of a lipophilic material. As a result, mist can be selectively trapped and agglomerated and dropped, so that the trapping ability is not lowered due to clogging of the pores as in the case of using a porous material such as activated carbon, and high separation is achieved. Performance can be maintained.

  (6) In this embodiment, the canister 94 which communicates with the second chamber 62 and can store the evaporated fuel is provided. Thereby, the evaporated fuel surplus in the second chamber 62 can be stored in the canister 94. In addition, by supplying the evaporated fuel stored in the canister 94 to the second chamber 62, the evaporated fuel concentration in the second chamber 62 can be increased.

(7) The evaporated fuel storage tank 50 is provided in contact with the cylinder block 11 of the engine 10. As a result, the evaporated fuel storage tank 50 is heated by the heat of the cylinder block 11, and the generation of the evaporated fuel in the evaporated fuel storage tank 50 is promoted.
(8) Further, the evaporated fuel storage tank 50 is provided with a temperature sensor 101 that detects the temperature of the evaporated fuel storage tank 50. Thereby, the concentration of the evaporated fuel in the evaporated fuel storage tank 50 can be estimated, and the purge valve 75 and the like can be appropriately controlled.

Hereinafter, 2nd Embodiment-4th Embodiment of this invention is described based on FIGS. In the second to fourth embodiments, the configuration of the evaporative fuel storage tank is mainly different. Therefore, the configuration of the evaporative fuel storage tank will be mainly described, and the description of other configurations will be omitted. 3 to 5 are schematic cross-sectional views of the evaporative fuel storage tank, and a description of a temperature sensor and the like is omitted.
(Second Embodiment)
An evaporative fuel storage tank according to a second embodiment of the present invention is shown in FIG. In the evaporated fuel storage tank 250, the evaporated fuel supply unit 257 is formed on the side wall 53 of the evaporated fuel storage tank 250. Thereby, it is possible to prevent the mist dropped from the filter member 55 from flowing into the evaporated fuel supply unit 257 side.
In addition, the same effects as the above (1) and (4) to (8) are obtained.

(Third embodiment)
An evaporative fuel storage tank according to a third embodiment of the present invention is shown in FIG. The evaporative fuel storage tank 350 has a protruding chamber 363 that protrudes to one side in the horizontal direction from the filter member 55 and forms a part of the second chamber 362. Further, the evaporated fuel supply unit 357 of the present embodiment is provided on the upper wall 364 formed on the upper side in the vertical direction of the protruding chamber 363. Thereby, it is possible to prevent the mist dropped from the filter member 55 from flowing into the evaporated fuel supply unit 357 side.
In addition, the same effects as the above (1) and (4) to (8) are obtained.

(Fourth embodiment)
FIG. 5 shows an evaporative fuel storage tank according to a fourth embodiment of the present invention. In the evaporated fuel storage tank 450, the agglomerated fuel discharge part 59 is formed off the center of the bottom wall 52 as in the above embodiment. The filter member 455 is provided to be inclined with respect to the horizontal direction. In this embodiment, the filter member 455 is provided so as to be inclined so that the agglomerated fuel discharge part 59 side is on the bottom. As a result, the mist dropped from the lower surface of the inclined filter member 455 and the lower portion in the vertical direction (the lower left side of the filter member 455 in FIG. 5) is discharged from the aggregated fuel discharge portion 59. Therefore, it is possible to prevent the mist dropped from the filter member 455 from flowing into the evaporated fuel supply unit 57 side.
In addition, the same effects as the above (1) and (4) to (8) are obtained.

(Other embodiments)
The fuel supply device of the above embodiment is applied to an in-cylinder direct injection engine, but may be applied to a port injection engine. Further, when applied to a port injection type engine, the high pressure pump may be omitted.
In the above embodiment, the fuel pumped up from the fuel tank by one low-pressure pump is supplied to the main injector and the sub-injector. In other embodiments, a pump may be provided for each injector.

  In the said embodiment, the temperature sensor was provided in the evaporative fuel storage tank. In other embodiments, the temperature sensor may be omitted. In this case, for example, if the evaporated fuel storage tank is provided so as to contact the engine block as in the above-described embodiment, the temperature of the evaporated fuel storage tank may be estimated from the temperature of the engine.

  In the above embodiment, the evaporated fuel storage tank is provided so as to contact the cylinder block. In other embodiments, the evaporative fuel storage tank may not be in contact with the cylinder block, and may be provided at any location. For example, the evaporative fuel storage tank may be provided adjacent to a cylinder head, an EGR pipe, an EGR cooler, an exhaust pipe, and the like, and the evaporative fuel storage tank may be heated using these heats. Moreover, you may comprise so that an evaporative fuel storage tank may be heated using engine cooling water. Thereby, the production | generation of the evaporative fuel in an evaporative fuel storage tank is accelerated | stimulated. Further, in order to promote the generation of the evaporated fuel in the evaporated fuel storage tank, the evaporated fuel storage tank may be provided with heating means such as a heater.

In the above embodiment, the aggregated fuel discharged from the aggregated fuel discharge part is returned to the fuel tank via the return passage. In another embodiment, the agglomerated fuel discharged from the agglomerated fuel discharge unit may be discharged to a location other than the fuel tank.
In other embodiments, for example, the components in the plurality of embodiments described above may be used in combination, such as inclining the filter member in the first embodiment.
As mentioned above, this invention is not limited to the said embodiment at all, In the range which does not deviate from the meaning of invention, it can implement with a various form.

DESCRIPTION OF SYMBOLS 1 ... Fuel supply apparatus 10 ... Engine (internal combustion engine)
11 ... Cylinder block (engine block)
12 ... Cylinder head (engine block)
19 ... Combustion chamber 22 ... Intake port (intake passage)
27 ... Exhaust port 29 ... Intake passage (intake passage)
30 ... Fuel tank 33 ... Low pressure pump (pump part)
34 ... High pressure pump (pump part)
40: Main injector (first injection valve)
42... Sub-injector (second injection part)
DESCRIPTION OF SYMBOLS 50 ... Evaporative fuel storage tank 51 ... Top wall 52 ... Bottom wall 53 ... Side wall 55 ... Filter member 57 ... Evaporated fuel supply part 58 ... Wall part 59 ... Aggregation Fuel discharge part 61 ... first chamber 62 ... second chamber 70 ... evaporated fuel passage member 71 ... evaporated fuel passage 94 ... canister 100 ... ECU
101 ... Temperature sensor

Claims (12)

A fuel tank for storing fuel;
A pump unit for pumping the fuel stored in the fuel tank;
A first injection valve that injects fuel pumped by the pump unit into a combustion chamber or an intake passage of an internal combustion engine;
A filter member that partitions the internal space into a first chamber formed on the upper side in the vertical direction and a second chamber formed on the lower side in the vertical direction of the first chamber, and evaporative fuel is supplied from the second chamber to the internal combustion engine side. An evaporative fuel supply tank, and an evaporative fuel storage tank having an agglomerated fuel discharge part for discharging the agglomerated fuel that is agglomerated liquid fuel from the lower side in the vertical direction of the second chamber;
A second injection valve that injects fuel pumped by the pump unit into the first chamber;
An evaporative fuel passage member that communicates with the evaporative fuel supply section and has an evaporative fuel passage that supplies evaporative fuel from the second chamber to the internal combustion engine;
A fuel supply device comprising:   2. The fuel supply device according to claim 1, wherein the evaporative fuel storage tank includes a wall portion that is formed in the second chamber and is vertically above the evaporative fuel supply unit.   The fuel supply device according to claim 2, wherein the wall portion is formed so as to be inclined so that the aggregated fuel discharge portion side is downward.   The fuel supply device according to any one of claims 1 to 3, wherein the evaporated fuel supply unit is formed on a side wall of the evaporated fuel storage tank. The evaporative fuel storage tank has a protruding chamber that protrudes to one side in the horizontal direction from the filter member and forms a part of the second chamber,
The fuel supply device according to any one of claims 1 to 3, wherein the evaporative fuel supply unit is formed vertically above the protruding chamber.   The fuel supply device according to claim 1, wherein the filter member is provided horizontally.   The fuel supply device according to claim 1, wherein the filter member is provided to be inclined with respect to a horizontal direction. The agglomerated fuel discharge part is formed offset from the center of the bottom wall of the evaporated fuel storage tank,
The fuel supply device according to claim 7, wherein the filter member is provided so as to be inclined so that the agglomerated fuel discharge portion side is downward.   The fuel supply device according to any one of claims 1 to 8, wherein the filter member is formed of a lipophilic material.   The fuel supply device according to any one of claims 1 to 9, further comprising a canister that communicates with the second chamber and can store evaporated fuel.   The fuel supply device according to claim 1, wherein the evaporative fuel storage tank is provided in contact with an engine block of the internal combustion engine.   The fuel supply device according to claim 1, further comprising a temperature sensor that detects a temperature of the evaporative fuel storage tank.

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