WO2015068373A1 - 燃料供給装置 - Google Patents
燃料供給装置 Download PDFInfo
- Publication number
- WO2015068373A1 WO2015068373A1 PCT/JP2014/005534 JP2014005534W WO2015068373A1 WO 2015068373 A1 WO2015068373 A1 WO 2015068373A1 JP 2014005534 W JP2014005534 W JP 2014005534W WO 2015068373 A1 WO2015068373 A1 WO 2015068373A1
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- WIPO (PCT)
- Prior art keywords
- fuel
- passage
- valve
- internal
- residual pressure
- Prior art date
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- 239000000446 fuel Substances 0.000 title claims abstract description 564
- 238000002485 combustion reaction Methods 0.000 claims abstract description 70
- 239000002828 fuel tank Substances 0.000 claims abstract description 28
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Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/22—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system
- F02M37/32—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system characterised by filters or filter arrangements
- F02M37/48—Filters structurally associated with fuel valves
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
- B01D35/005—Filters specially adapted for use in internal-combustion engine lubrication or fuel systems
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
- B01D35/02—Filters adapted for location in special places, e.g. pipe-lines, pumps, stop-cocks
- B01D35/027—Filters adapted for location in special places, e.g. pipe-lines, pumps, stop-cocks rigidly mounted in or on tanks or reservoirs
- B01D35/0273—Filtering elements with a horizontal or inclined rotation or symmetry axis submerged in tanks or reservoirs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
- B01D35/14—Safety devices specially adapted for filtration; Devices for indicating clogging
- B01D35/147—Bypass or safety valves
- B01D35/1475—Pressure relief valves or pressure control valves
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
- B01D35/26—Filters with built-in pumps filters provided with a pump mounted in or on the casing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
- B60K15/01—Arrangement of fuel conduits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/0011—Constructional details; Manufacturing or assembly of elements of fuel systems; Materials therefor
- F02M37/0023—Valves in the fuel supply and return system
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/02—Feeding by means of suction apparatus, e.g. by air flow through carburettors
- F02M37/025—Feeding by means of a liquid fuel-driven jet pump
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/04—Feeding by means of driven pumps
- F02M37/08—Feeding by means of driven pumps electrically driven
- F02M37/10—Feeding by means of driven pumps electrically driven submerged in fuel, e.g. in reservoir
- F02M37/106—Feeding by means of driven pumps electrically driven submerged in fuel, e.g. in reservoir the pump being installed in a sub-tank
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/22—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/22—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system
- F02M37/32—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system characterised by filters or filter arrangements
- F02M37/44—Filters structurally associated with pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/22—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system
- F02M37/32—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system characterised by filters or filter arrangements
- F02M37/46—Filters structurally associated with pressure regulators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/22—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system
- F02M37/32—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system characterised by filters or filter arrangements
- F02M37/50—Filters arranged in or on fuel tanks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
- B01D35/14—Safety devices specially adapted for filtration; Devices for indicating clogging
- B01D35/147—Bypass or safety valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/0011—Constructional details; Manufacturing or assembly of elements of fuel systems; Materials therefor
- F02M37/0023—Valves in the fuel supply and return system
- F02M37/0029—Pressure regulator in the low pressure fuel system
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/04—Feeding by means of driven pumps
- F02M37/12—Feeding by means of driven pumps fluid-driven, e.g. by compressed combustion-air
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/22—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system
- F02M37/32—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system characterised by filters or filter arrangements
- F02M37/34—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system characterised by filters or filter arrangements by the filter structure, e.g. honeycomb, mesh or fibrous
Definitions
- the present disclosure relates to a fuel supply device that supplies fuel in a fuel tank to an internal combustion engine side.
- a fuel supply device that supplies fuel pumped from a fuel tank by a fuel pump through a fuel filter in a filter case and supplies the fuel from the case to the internal combustion engine side is widely used by being mounted on a vehicle. ing.
- a fuel passage that circulates fuel downstream from the fuel filter, and a discharge that discharges fuel flowing through the fuel passage toward the internal combustion engine side.
- a passage is formed in the filter case.
- the fuel passage is opened and closed by a plurality of opening and closing valves provided in the filter case, so that the pressure of the fuel supplied to the internal combustion engine can be adjusted appropriately. It has become.
- each on-off valve is arranged in a plurality of locations along with the fuel passages to be opened and closed in the circumferential direction of the filter case. Therefore, the diameter of the circumscribed circle in contact with the outer periphery of the case including the outer periphery of the position where each on-off valve is arranged increases in the axial view of the filter case. That is, since the radial size of the filter case increases, there remains room for improvement as a fuel supply device that is required to be downsized due to mounting restrictions.
- the present disclosure has been made in view of the above points, and an object thereof is to reduce the size of a fuel supply device having a plurality of on-off valves in a filter case.
- the first disclosure includes a fuel pump and a filter case that accommodates a fuel filter, and the fuel pumped from the fuel tank by the fuel pump is filtered by the fuel filter and supplied from the filter case to the internal combustion engine side.
- the filter case includes a fuel passage through which fuel is circulated downstream of the fuel filter, a discharge passage for discharging fuel flowing through the fuel passage toward the internal combustion engine, and a fuel passage. And a plurality of open / close valves that are integrated in a specific location in the circumferential direction.
- the plurality of on-off valves in the filter case are integrated with the fuel passages to be opened and closed and the discharge passage for discharging the fuel flowing through the fuel passages, so that specific points in the circumferential direction are provided. It is biased to. According to this, the diameter of the circumscribed circle in contact with the outer periphery of the case including the outer periphery of the specific portion where each open / close valve is arranged becomes smaller in the axial view of the filter case. That is, since the radial size of the filter case is reduced, it is possible to reduce the size of the fuel supply device having a plurality of on-off valves in the case.
- the fuel passage, the discharge passage, and the plurality of on-off valves are housed in a protrusion that protrudes from the housing location of the fuel filter toward the specific location in the filter case.
- a plurality of on-off valves are housed together with a fuel passage and a discharge passage in a protrusion that protrudes from a fuel filter housing location toward a specific location in the filter case. According to this, it is possible to reduce the diameter of the circumscribed circle in contact with the outer periphery of the filter case including the outer periphery of the protrusion, thereby reducing the size of the fuel supply device in the radial direction of the case.
- the fuel passage has a communication port that communicates with the housing chamber that houses the fuel filter in the filter case on the downstream side of the fuel filter, and allows the fuel to circulate from the communication port.
- a springless external residual pressure holding valve that holds the pressure of fuel supplied to the internal combustion engine by discharge from the discharge passage as the fuel pump stops, and opens when the fuel pump operates.
- This is an external residual pressure holding valve that has a valve element that is locked to the valve stopper, and another one of the opening and closing valves is a spring-biased type that holds the fuel pressure in the storage chamber as the fuel pump stops.
- the internal residual pressure holding valve is an internal residual pressure holding valve having a valve element that opens against a spring reaction force when the fuel pump is operated.
- the fuel is opened from the communication port to the external residual pressure holding valve side through the discharge passage so that the fuel is discharged from the internal residual pressure holding valve to the external residual pressure holding valve side.
- an internal passage portion that restricts the flow of fuel circulated from the communication port toward the internal residual pressure holding valve side more than the external passage portion is formed in the fuel passage.
- the external residual pressure holding valve is a springless type having a valve element that is opened by the operation of the fuel pump and locked to the valve stopper. Therefore, even if pressure pulsation occurs due to fuel pumping from the fuel pump, the locked valve element is unlikely to vibrate.
- the internal residual pressure holding valve is a spring-biased type having a valve element that opens against a spring reaction force when the fuel pump is operated.
- the communication port that communicates with the storage chamber on the downstream side of the fuel filter is connected to the external residual pressure holding valve side An opening is made at a misaligned position.
- the pressure pulsation generated by the fuel pumping from the fuel pump can be attenuated in the internal passage portion that is narrowed down to the spring biased internal residual pressure holding valve. Therefore, the vibration of the valve element at the internal residual pressure holding valve can also be damped.
- the fuel passage has a communication port that communicates with the accommodation chamber that houses the fuel filter in the filter case on the downstream side of the fuel filter, and allows the fuel to circulate from the communication port, thereby opening and closing the valve.
- a communication port that communicates with the accommodation chamber that houses the fuel filter in the filter case on the downstream side of the fuel filter, and allows the fuel to circulate from the communication port, thereby opening and closing the valve.
- One of these is a spring-biased internal residual pressure holding valve that holds the fuel pressure in the housing chamber when the fuel pump is stopped, and opens the valve element against the spring reaction force as the fuel pump is operated.
- the internal residual pressure holding valve has a communication port, and the communication port opens in a misaligned portion of the fuel passage that is displaced from the internal residual pressure holding valve to the discharge passage side, and allows fuel to flow from the communication port toward the discharge passage side.
- the external passage portion to be circulated and the internal passage portion that restricts the flow of fuel to be circulated from the communication port toward the internal residual pressure holding valve side than the external passage portion are formed in the fuel passage.
- the internal residual pressure holding valve is a spring-biased type having a valve element that opens against a spring reaction force with the operation of the fuel pump.
- the communication port communicating with the storage chamber downstream from the fuel filter is located from the internal residual pressure holding valve to the discharge passage side. Open at the misaligned location.
- the pressure pulsation generated by the fuel pumping from the fuel pump can be damped in the internal passage until it goes to the spring-biased internal residual pressure holding valve. Therefore, the vibration of the valve element at the internal residual pressure holding valve can also be damped.
- the pressure pulsation in the internal residual pressure holding valve can be suppressed from being amplified by the vibration of the valve element, noise generated in the path from the fuel passage to the internal combustion engine can be reduced. It becomes.
- FIG. 4 is a view showing the pump unit of FIG. 1 and is a cross-sectional view taken along line II-II of FIG.
- FIG. 1st embodiment it is a schematic diagram explaining the assembly
- 2nd embodiment it is a schematic diagram explaining the assembly
- FIG. 12 is a view corresponding to FIG. 2 showing a pump unit of a fuel supply device according to a fourth embodiment, and is a cross-sectional view taken along the line IX-IX in FIG. 11.
- FIG. 10 is a sectional view taken along line XX in FIG. 9. It is a top view which shows the pump unit of FIG. It is a top view which shows the pump unit of the fuel supply apparatus by 5th embodiment. It is sectional drawing which shows the fuel supply apparatus by 6th embodiment corresponding to FIG.
- FIG. 18 is a view showing a fuel supply device according to a seventh embodiment, and is a cross-sectional view taken along line XV-XV in FIG. 17.
- FIG. 18 is a view showing the pump unit of FIG. 15 and is a cross-sectional view taken along line XVI-XVI of FIG.
- FIG. 16 is a sectional view taken along line XVII-XVII in FIG. 15.
- It is a fragmentary sectional view which shows the fuel supply apparatus of FIG. It is a schematic diagram for demonstrating the characteristic of the fuel supply apparatus by 7th embodiment. It is a characteristic view for demonstrating the effect of the fuel supply apparatus by 7th embodiment.
- the device 1 supplies the fuel in the fuel tank 2 directly to the fuel injection valve of the internal combustion engine 3 or indirectly through a high-pressure pump or the like.
- the fuel tank 2 on which the apparatus 1 is mounted is formed in a hollow shape with resin or metal, and stores fuel to be supplied to the internal combustion engine 3 side.
- the internal combustion engine 3 that supplies fuel from the device 1 may be a gasoline engine or a diesel engine.
- the vertical direction of the device 1 shown in FIGS. 1 and 2 substantially coincides with the vertical direction of the vehicle on a horizontal plane.
- the apparatus 1 includes a flange 10, a sub tank 20, an adjustment mechanism 30, and a pump unit 40.
- the flange 10 is formed in a disk shape with resin and is attached to the top plate portion 2 a of the fuel tank 2.
- the flange 10 closes the through hole 2b formed in the portion 2a by sandwiching the packing 10a between the flange 10 and the top plate portion 2a.
- the flange 10 integrally includes a fuel supply pipe 12 and an electrical connector 14.
- the fuel supply pipe 12 protrudes upward and downward from the flange 10.
- the fuel supply pipe 12 communicates with the pump unit 40 via a flexible tube 12a that can be bent. With this communication mode, the fuel supply pipe 12 supplies the fuel pumped from the fuel tank 2 by the fuel pump 42 of the pump unit 40 to the internal combustion engine 3 side outside the fuel tank 2.
- the electrical connector 14 also protrudes upward and downward from the flange 10. The electrical connector 14 electrically connects the fuel pump 42 to an external circuit (not shown). With this electrical connection, the fuel pump 42 is controlled by an external circuit.
- the sub tank 20 is formed of a resin into a bottomed cylindrical shape and is accommodated in the fuel tank 2.
- the bottom 20 a of the sub tank 20 is placed on the bottom 2 c of the fuel tank 2.
- a concave bottom portion 20b that is recessed upward in the bottom portion 20a secures an inflow space 22 between the bottom portion 2c.
- inflow ports 24 and 25 are formed in the concave bottom portion 20b. The inflow ports 24 and 25 communicate with the fuel tank 2 through the inflow space 22. Under such a communication mode, the one inlet 24 allows the fuel that the jet pump 45 of the pump unit 40 transfers from the fuel tank 2 to flow into the sub tank 20.
- the other inflow port 25 allows fuel oil supplied into the tank 2 to flow into the sub tank 20 when fueling the empty fuel tank 2.
- the fuel flowing in through the inlets 24 and 25 is stored in the internal space 26 (see also FIG. 1) of the sub tank 20 including the periphery of the fuel pump 42.
- a reed valve 27 that opens the inlet 24 when a negative pressure from the jet pump 45, which will be described in detail later, and an inlet 25 are opened when the hydraulic pressure is applied.
- a reed valve 28 is provided.
- the adjusting mechanism 30 includes a holding member 32, a pair of support posts 34, an elastic member 36, and the like.
- the holding member 32 is formed in an annular shape with resin, and is mounted on the upper portion 20 c of the sub tank 20 in the fuel tank 2.
- Each column 34 is formed of a metal in a cylindrical shape, is accommodated in the fuel tank 2, and extends in the vertical direction. The upper end portion of each column 34 is fixed to the flange 10. Below each upper end, each column 34 is slidably guided in the vertical direction by the holding member 32 in a state of entering the sub tank 20.
- the elastic member 36 is formed of a metal in a coil spring shape and is accommodated in the fuel tank 2.
- the elastic member 36 is coaxially disposed around the corresponding one column 34.
- the elastic member 36 is interposed between the corresponding column 34 and the holding member 32 in the vertical direction.
- the elastic member 36 presses the bottom portion 20a of the sub tank 20 toward the bottom portion 2c of the fuel tank 2 through the holding member 32 by such an interposition form.
- the pump unit 40 is accommodated in the fuel tank 2.
- the pump unit 40 includes a suction filter 41, a fuel pump 42, a filter case 43, a port member 44, a jet pump 45, and the like.
- the suction filter 41 is, for example, a nonwoven fabric filter or the like, and is placed on the bottom 20a in the sub tank 20.
- the suction filter 41 filters the fuel sucked into the fuel pump 42 from the internal space 26 of the sub tank 20, thereby removing large foreign matters in the suction target fuel.
- the fuel pump 42 is disposed above the suction filter 41 in the sub tank 20.
- the cylindrical fuel pump 42 as a whole has its axial direction substantially aligned with the vertical direction.
- the fuel pump 42 is an electric pump.
- the fuel pump 42 is electrically connected to the electrical connector 14 via a flexible wiring 42a that can be bent.
- the fuel pump 42 operates by receiving drive control from an external circuit through the electrical connector 14.
- the operating fuel pump 42 sucks the fuel stored around it through the suction filter 41, and further regulates the sucked fuel by internal pressurization.
- the fuel pump 42 has a delivery valve 421 integrally with a delivery port 420 that delivers fuel.
- the delivery valve 421 is a springless check valve. While the fuel is pressurized with the operation of the fuel pump 42, the delivery valve 421 is opened. When the valve is opened, fuel is pumped from the delivery port 420 into the filter case 43. On the other hand, when the pressurization of the fuel is stopped as the fuel pump 42 is stopped, the delivery valve 421 is closed. When the valve is closed, the fuel pumping into the filter case 43 is also stopped.
- the filter case 43 is formed in a hollow shape with resin, and is arranged across the inside and outside of the sub tank 20 in the vertical direction.
- the filter case 43 is positioned with respect to the sub tank 20 by being held by the holding member 32.
- the accommodating portion 46 of the filter case 43 is formed in a double cylindrical shape from the inner cylindrical portion 460 and the outer cylindrical portion 461, and is disposed coaxially around the fuel pump 42.
- the axial direction of the filter case 43 is along the up-and-down direction due to the arrangement form of the accommodating portions 46.
- the accommodating portion 46 forms a communication chamber 462 communicating with the delivery port 420 above the inner cylinder portion 460 and the outer cylinder portion 461 in a flat space shape.
- the accommodating portion 46 forms an accommodating chamber 463 that communicates with the communication chamber 462 between the inner cylinder portion 460 and the outer cylinder portion 461 in a cylindrical hole shape.
- a cylindrical fuel filter 464 is accommodated in the accommodation chamber 463.
- the fuel filter 464 is a honeycomb filter or the like, for example, and removes fine foreign matters in the pressurized fuel by filtering the pressurized fuel sent from the delivery port 420 to the accommodation chamber 463 via the communication chamber 462. .
- the protrusion 47 of the filter case 43 protrudes in the radially outward direction from the outer tube portion 461 toward the specific portion S in the circumferential direction.
- a fuel passage 470, a partition wall 471, a discharge passage 472, an external residual pressure holding valve 473, a branch passage 474, an internal residual pressure holding valve 475, and a relief passage 476 are housed in the protrusion 47.
- the protrusion 47 has the elements 470, 471, 472, 473, 474, 475, and 476 integrally with the specific portion S in the circumferential direction.
- the fuel passage 470 is formed in a space that extends the protrusion 47 in an inverted U shape.
- the fuel passage 470 is partitioned by a partition wall 471 so that it is folded back in the axial direction of the filter case 43 along the vertical direction.
- the fuel passage 470 is linearly partitioned by a flat strip-like partition wall 471.
- the upstream straight portion 470b and the downstream straight portion 470c respectively extend downward from both ends of the uppermost folded portion 470a into a straight, substantially rectangular hole shape.
- the fuel passage 470 is constituted by the folded portion 470a, the upstream straight portion 470b at a location upstream from the portion 470a, and the downstream straight portion 470c at a location downstream from the portion 470a.
- the fuel passage 470 is disposed downstream of the fuel filter 464 by connecting the upstream straight portion 470b to the fuel outlet 463a of the storage chamber 463 as shown in FIGS.
- the fuel passage 470 having such an arrangement allows the pressurized fuel filtered by the fuel filter 464 and led out from the fuel outlet 463a to flow toward the most downstream end 470d side of the downstream straight portion 470c.
- the discharge passage 472 is formed in a cylindrical shape at an intermediate portion in the vertical direction of the protrusion 47.
- the discharge passage 472 branches from the downstream straight portion 470 c downstream of the fuel outlet 463 a in the fuel passage 470 in a direction orthogonal to the axial direction of the filter case 43.
- the discharge passage 472 communicates with the discharge port 440 of the port member 44, thereby discharging the fuel flowing through the fuel passage 470 to the internal combustion engine 3 side through the flexible tube 12a and the fuel supply pipe 12 (see FIG. 1).
- the fuel diverted from the flow toward the internal combustion engine 3 side by the discharge passage 472 flows in the downstream side of the passage 472.
- the external residual pressure holding valve 473 is provided in the upstream straight portion 470b upstream of the discharge passage 472 and downstream of the fuel outlet 463a. That is, the external residual pressure holding valve 473 is disposed in the middle of the fuel passage 470 from the fuel outlet 463a toward the discharge passage 472.
- the external residual pressure holding valve 473 is a springless check valve in this embodiment.
- the external residual pressure holding valve 473 functions as one of “a plurality of opening / closing valves” in order to open / close the fuel passage 470 including the upstream straight portion 470b.
- the external residual pressure holding valve 473 is opened while the filtered pressurized fuel is led out from the fuel outlet 463a as the fuel pump 42 is operated. When the valve is opened, the pressurized fuel led to the fuel passage 470 flows toward the discharge passage 472 and the most downstream end 470d. On the other hand, when the derivation of fuel from the fuel outlet 463a stops as the fuel pump 42 stops, the external residual pressure holding valve 473 closes.
- the valve When the valve is closed, the flow of fuel toward the discharge passage 472 and the most downstream end 470d is also stopped, so that the pressure of the fuel supplied to the internal combustion engine 3 side by the discharge before the valve closing from the discharge passage 472 is maintained. Will be. That is, the residual pressure holding function is exerted on the fuel supplied to the internal combustion engine 3 through the fuel passage 470 by the closed external residual pressure holding valve 473. Note that the holding pressure by the residual pressure holding function of the external residual pressure holding valve 473 is the pressure adjusted when the fuel pump 42 is stopped.
- the fuel passage 470 communicates with the internal combustion engine 3 via the external residual pressure holding valve 473 and the discharge passage 472.
- a fuel passage 470 is formed across the case main body 430 and the case cap 431 included in the filter case 43 and the valve housing 477 included in the external residual pressure holding valve 473. Yes.
- the case main body 430 includes a bottomed portion that forms the storage chamber 463 in the storage portion 46 and a bottomed portion that forms the straight portions 470 b and 470 c of the protrusion 47.
- the shaped part is integrally formed of resin.
- the case main body 430 has openings 432a, 432b, and 432c that open in a cylindrical hole shape, and a press-fit recess 433 that opens in a flat space.
- the accommodation opening 432 a is formed at a position corresponding to the accommodation chamber 463.
- the upstream opening 432b is formed at a position corresponding to the upstream straight portion 470b.
- the downstream opening 432c is formed at a position corresponding to the downstream straight portion 470c.
- the press-fit recess 433 is formed across the periphery of the upstream opening 432b and the periphery of the downstream opening 432c.
- the case cap 431 is formed by integrally molding a concave portion that forms the communication chamber 462 in the housing portion 46 and a concave portion that forms the folded portion 470a in the protrusion 47 with resin.
- the case cap 431 covers all the openings 432a, 432b, and 432c of the main body 430 by being bonded to the case main body 430 by welding.
- the upper surface portion 430a of the case body 430 and the lower surface portion 431a of the case cap 431 are both formed in a planar shape, and are joined to each other on a common virtual plane Icv. Yes.
- the virtual plane Icv of the present embodiment is set perpendicular to the axial direction of the filter case 43 along the vertical direction, so that the space between the case main body 430 in the sub tank 20 and the case cap 431 outside the tank 20 is set.
- the junction boundary B on the plane Icv is formed.
- the valve housing 477 is formed by integrally molding a cylindrical housing body 477a and a flat joint plate 477b with resin.
- the housing body 477a is fitted into the upstream opening 432b. With this fitting form, a part of the upstream straight portion 470b penetrates the housing body 477a in the vertical direction.
- the housing body 477a has a conical surface around the upstream straight portion 470b.
- the valve seat 477as has a diameter that decreases toward the bottom.
- the joining plate 477b provided continuously to the upper part of the housing main body 477a protrudes from the main body 477a in a direction orthogonal to the axial direction of the filter case 43.
- the joining plate 477b is press-fitted into a press-fit recess 433 around the openings 432b and 432c.
- the upper surface portion 477bu and the lower surface portion 477bl of the joining plate 477b are both formed in a planar shape. With this shape, the upper surface portion 477bu is joined to the inner peripheral edge portion of the press-fit recess 433 in the upper surface portion 430a of the case body 430 and the lower surface portion 431a of the case cap 431 by welding on the common virtual plane Icv.
- the external residual pressure holding valve 473 is further combined with a valve element 478 as shown in FIGS.
- the valve element 478 is formed in a cylindrical shape from a composite material of resin and rubber or a composite material of metal and rubber, and is accommodated coaxially in the housing body 477a. With this accommodation form, the valve element 478 can be attached to and detached from the valve seat 477as at a location where the upstream straight portion 470b penetrates. Therefore, the external residual pressure holding valve 473 opens as the valve element 478 is separated from the valve seat 477as, and closes as the valve element 478 is seated on the valve seat 477as.
- the steps shown in FIG. 4 are sequentially performed.
- the housing body 477a is fitted into the case body 430, and the joining plate 477b is press-fitted.
- the case cap 431 is overlapped and welded to the case main body 430 and the joining plate 477b on the common virtual plane Icv, thereby joining the elements 431, 430, and 477b.
- the external residual pressure holding valve 473 is provided at the junction boundary B between the case main body 430 and the case cap 431 in the filter case 43 as shown in FIGS.
- the branch passage 474 is formed in a stepped cylindrical hole shape at the lower end portion located below the discharge passage 472 and the most downstream end 470 d in the protrusion 47.
- the branch passage 474 branches in the upstream straight portion 470 b from the upstream side of the external residual pressure holding valve 473 in a direction orthogonal to the axial direction of the filter case 43.
- the branch passage 474 of the first embodiment branches from the upstream straight portion 470b toward the lower side of the most downstream end 470d, and does not intersect the downstream straight portion 470c.
- the branch passage 474 communicates with the jet port 441 of the port member 44 to guide the fuel discharged from the fuel passage 470 through the internal residual pressure holding valve 475 to the jet pump 45.
- the internal residual pressure holding valve 475 is provided in the branch passage 474.
- the internal residual pressure holding valve 475 is a spring biased check valve in the present embodiment.
- the internal residual pressure holding valve 475 functions as one of “a plurality of open / close valves” in order to open and close the fuel passage 470 that communicates with the branch passage 474. While the fuel pump 42 is operated, the internal residual pressure holding valve 475 is opened while fuel having a pressure equal to or higher than the set pressure is derived from the fuel outlet 463a. When the valve is opened, the pressurized fuel that has been branched from the fuel passage 470 to the branch passage 474 flows toward the jet pump 45.
- the derivation stops whereby the internal residual pressure holding valve 475 is stopped. Closes.
- the valve is closed, the flow of fuel toward the jet pump 45 is also stopped. Therefore, particularly when the fuel pump 42 is stopped, the pressure of the fuel in the housing portion 46 is also taken into account when the delivery valve 421 is closed. Is held at the set pressure of the internal residual pressure holding valve 475. That is, the internal residual pressure holding valve 475 which is closed provides a residual pressure holding function for the fuel in the housing location of the fuel filter 464.
- the holding pressure by the residual pressure holding function of the internal residual pressure holding valve 475 is set to be 250 kPa, for example.
- the relief passage 476 is formed in a cylindrical hole shape at an intermediate portion located between the passages 472 and 474 in the vertical direction of the protrusion 47.
- the relief passage 476 branches from the downstream side of the discharge passage 472 in the downstream straight portion 470 c in a direction orthogonal to the axial direction of the filter case 43.
- the relief passage 476 communicates with the relief port 442 of the port member 44, and thus the fuel that is separated from the flow toward the internal combustion engine 3 side downstream of the external residual pressure holding valve 473 in the filter case 43. Then, it guides to the relief valve 443.
- the port member 44 is formed in a hollow shape with resin and is disposed in the sub tank 20. As shown in FIGS. 2 and 3, the port member 44 is joined to the protrusion 47 of the specific location S by welding.
- the side surface 44a of the port member 44 and the side surface 47a of the protrusion 47 are both formed in a planar shape, and are joined to each other on a common virtual plane Ifp. Since the virtual plane Ifp of the present embodiment is set along the axial direction of the filter case 43, the port member 44 is joined in a posture that projects from the protrusion 47 in a direction orthogonal to the axial direction.
- the port member 44 of the present embodiment protrudes in the tangential direction of the circular contour with respect to the outer peripheral surface 461a of the outer cylinder portion 461 that is curved in a cylindrical shape as a “curved surface”.
- the diameter of the circumscribed circle C in FIG. 3 that contacts the outer periphery of the filter case 43 including the outer periphery of the protrusion 47 that is the outer periphery of the specific portion S and also contacts the outer periphery of the port member 44 is The overhang amount of the port member 44 is set so as to be as small as possible.
- the port member 44 integrally includes a discharge port 440, a jet port 441, a relief port 442, and a relief valve 443 outside the filter case 43.
- the discharge port 440 is formed in an L-shaped space at the top of the port member 44 in the vertical direction. As shown in FIG. 2, the discharge port 440 communicates with a discharge passage 472 that opens to the side surface 47a. At the same time, the discharge port 440 communicates with the flexible tube 12a (see FIG. 1) by directing the most downstream end upward on the side opposite to the communication portion of the discharge passage 472. With these communication modes, the discharge port 440 communicates with the fuel passage 470 in the filter case 43 via the discharge passage 472, and on the internal combustion engine 3 side outside the filter case 43 via the flexible tube 12 a and the fuel supply pipe 12. Through.
- the discharge port 440 functioning as one of “a plurality of fuel ports” allows the fuel flowing from the fuel passage 470 to the discharge passage 472 to flow to the internal combustion engine 3 side. Dispense toward.
- the jet port 441 is formed in an inverted L-shaped space at the lower end portion of the port member 44 located below the discharge port 440.
- the jet port 441 communicates with the branch passage 474 that opens to the side surface 47a, and communicates with the jet pump 45 on the side opposite to the communication location.
- the jet port 441 communicates with the fuel passage 470 in the filter case 43 via the branch passage 474 and directly communicates with the jet pump 45 outside the filter case 43.
- the jet port 441 functioning as one of “a plurality of fuel ports” allows the discharged fuel from the fuel passage 470 through the internal residual pressure holding valve 475 to be discharged.
- the guide action toward the jet pump 45 is exhibited.
- the relief port 442 is formed in a stepped cylindrical hole shape at an intermediate portion located between the ports 440 and 441 in the vertical direction of the port member 44.
- the relief port 442 communicates with the relief passage 476 that opens to the side surface 47a, and communicates with the relief valve 443 on the side opposite to the communicating portion.
- the relief port 442 communicates with the fuel passage 470 in the filter case 43 via the relief passage 476 and directly communicates with the relief valve 443 outside the filter case 43.
- the relief port 442 functioning as one of the “plurality of fuel ports” by passing through the inside and outside of the filter case 43 in this way allows the fuel to be separated from the flow toward the internal combustion engine 3 in the fuel passage 470.
- the guide action toward the relief valve 443 is exhibited.
- the relief valve 443 is provided in the relief port 442 and communicates with the fuel passage 470 via the relief passage 476. Further, the relief valve 443 communicates with the internal space 26 of the sub tank 20 through the most downstream end 442 a of the relief port 442, so that the guide fuel in the relief passage 476 can be discharged to the space 26.
- the relief valve 443 is a spring biased check valve in the present embodiment.
- the relief valve 443 opens and closes the fuel passage 470 that communicates with the relief port 442.
- the relief valve 443 is closed while the normal state of the fuel supply path from the fuel passage 470 to the internal combustion engine 3 is maintained and the pressure of the relief port 442 becomes less than the relief pressure regardless of the operation and stop of the fuel pump 42. I speak.
- the fuel pressure-regulated by the operation of the fuel pump 42 when the valve is closed is discharged through the discharge passage 472 in the filter case 43 and the discharge port 440 outside the case 43, thereby supplying fuel to the internal combustion engine 3 side. Become.
- the relief valve 443 is Open the valve.
- the guide fuel to the relief valve 443 is discharged into the internal space 26 of the sub tank 20 and is thus released until the pressure of the fuel supplied to the internal combustion engine 3 reaches the relief pressure. That is, the relief function by the opened relief valve 443 is exerted on the fuel supplied to the internal combustion engine 3 side.
- the relief pressure by the relief function of the relief valve 443 is set to be 650 kPa, for example.
- the jet pump 45 is formed in a hollow shape with resin and is disposed below the port member 44 in the sub tank 20.
- the jet pump 45 is placed on the bottom 20a of the sub tank 20 particularly on the concave bottom 20b. With such a mounting form, the jet pump 45 and the port member 44 overlap the inflow port 24 in the axial direction of the filter case 43 on the bottom 20a.
- the jet pump 45 integrally includes a pressurizing unit 450, a nozzle unit 451, a suction unit 452, and a diffuser unit 453.
- the pressurizing unit 450 has a pressurizing passage 454 formed in a stepped cylindrical hole extending along the axial direction of the filter case 43.
- the pressurizing passage 454 is located below the port member 44 and communicates with the jet port 441. Under such a communication form, the pressurized fuel discharged from the fuel passage 470 in the filter case 43 through the branch passage 474 in the case 43 passes through the jet port 441 outside the case 43 to the pressurized passage 454. Guided.
- the nozzle portion 451 forms a nozzle passage 455 in a cylindrical hole shape extending in a direction orthogonal to the axial direction of the filter case 43.
- the nozzle passage 455 is located below the pressurizing unit 450 and communicates with the pressurizing passage 454. Further, the nozzle passage 455 is narrower in the passage cross-sectional area than the pressurizing passage 454. Under these communication and throttle configurations, the pressurized fuel guided to the pressurized passage 454 flows into the nozzle passage 455.
- the suction portion 452 forms a suction passage 456 in a flat space extending in a direction orthogonal to the axial direction of the filter case 43.
- the suction passage 456 is located below the pressurizing part 450 and the nozzle part 451 and communicates with the inflow port 24. Under such a communication mode, the fuel that has flowed into the sub tank 20 through the inflow port 24 flows through the suction passage 456.
- the diffuser portion 453 forms a diffuser passage 457 in a cylindrical hole shape extending in a direction orthogonal to the axial direction of the filter case 43.
- the diffuser passage 457 is located below the pressurizing unit 450 and communicates with the nozzle passage 455 and communicates with the internal space 26 of the sub tank 20 on the side opposite to the communication portion. Further, the diffuser passage 457 has a passage sectional area larger than that of the nozzle passage 455. Under these communication and expansion modes, when the pressurized fuel that has flowed into the nozzle passage 455 is ejected into the diffuser passage 457 and a negative pressure is generated around the ejection flow, the fuel in the fuel tank 2 flows from the inlet 24.
- the air is sequentially sucked into the suction passage 456 and the diffuser passage 457.
- the fuel thus sucked is subjected to a diffuser action in the diffuser passage 457 and is pumped to be transferred to the internal space 26 including the periphery of the fuel pump 42.
- the diffuser passage 457 having a large-diameter circular cross section is eccentric upward with respect to the nozzle passage 455 having a small-diameter circular cross section.
- the most downstream end 457a communicating with the internal space 26 in the diffuser passage 457 of the present embodiment is spaced upward from the deepest bottom portion 20d surrounding the concave bottom portion 20b of the bottom portion 20a of the sub tank 20. .
- the plurality of valves 473 and 475 in the filter case 43 are integrated with the fuel passage 470 to be opened and closed and the discharge passage 472 for discharging the fuel flowing through the fuel passage 470 in the circumferential direction. It is biased to the specific part S. According to this, the diameter of the circumscribed circle C in contact with the outer periphery of the case 43 including the outer periphery of the specific portion S where the valves 473 and 475 are arranged is reduced when the filter case 43 is viewed in the axial direction. That is, since the radial size of the filter case 43 is reduced, it is possible to reduce the size of the device 1 having the plurality of valves 473 and 475 in the case 43.
- a plurality of valves 473 and 475 are provided on the protrusion 47 that protrudes from the housing portion 46 of the fuel filter 464 toward the specific location S in the filter case 43, and the fuel passage 470 and the discharge passage 472. It is stored with. According to this, it is possible to reduce the diameter of the circumscribed circle C in contact with the outer periphery of the filter case 43 including the outer periphery of the protrusion 47, thereby reducing the size of the device 1 in the radial direction of the case 43.
- the internal residual pressure holding valve 475 that the filter case 43 has at the specific location S holds the fuel pressure in the housing portion 46 of the fuel filter 464 as the fuel pump 42 stops. According to such a residual pressure holding function, it is possible to suppress the generation of vapor due to a decrease in the pressure of the high-temperature fuel in the housing portion 46 of the fuel filter 464 when the fuel pump 42 is stopped. Therefore, when the resupply of fuel to the internal combustion engine 3 side is requested from the stop state of the fuel pump 42, the resupply is delayed or hindered due to the vapor generated in the housing portion 46 of the fuel filter 464. Can be avoided.
- the jet pump 45 ejects the fuel discharged from the fuel passage 470 through the internal residual pressure holding valve 475 in order to transfer the fuel in the fuel tank 2 to the periphery of the fuel pump 42.
- the fuel transfer function around the fuel pump 42 can be realized by using the exhaust fuel generated as a result of the residual pressure holding function, it is possible to reduce the size of the apparatus 1 by integrating the functions. It becomes.
- the external residual pressure holding valve 473 that the filter case 43 has at the specific location S stops the fuel pump 42 by using the pressure of the fuel supplied to the internal combustion engine 3 side by the discharge from the discharge passage 472. Hold with. According to such a residual pressure holding function, when resupply of fuel from the stop state of the fuel pump 42 to the internal combustion engine 3 is requested, the resupply can be immediately performed.
- the jet pump 45 can exhibit the fuel transfer function by the ejection of the discharged fuel because the discharged fuel from the fuel passage 470 is guided by the branch passage 474.
- the branch passage 474 branches from the fuel passage 470 on the upstream side of the external residual pressure holding valve 473. Therefore, the fuel transfer function of the jet pump 45 can be ensured without hindering the residual pressure holding function of the external residual pressure holding valve 473.
- the branch passage 474 is integrated with the valves 473 and 475 and the passages 470 and 472 at the specific location S. For this reason, it is possible to reduce the diameter of the circumscribed circle C that is in contact with the outer periphery of the filter case 43, thereby promoting the downsizing of the device 1 in the radial direction of the case 43.
- the branch passage 474 branched from the fuel passage 470 on the upstream side of the external residual pressure holding valve 473 is discharged from the fuel passage 470 through the internal residual pressure holding valve 475 provided therein.
- the fuel is guided to the jet pump 45. According to this, the fuel transfer function of the jet pump 45 can be ensured without inhibiting the residual pressure holding function of the internal residual pressure holding valve 475 as well as the residual pressure holding function of the external residual pressure holding valve 473.
- the relief valve 443 is supplied to the internal combustion engine 3 side by guiding the fuel, which is divided from the flow toward the internal combustion engine 3 side in the fuel passage 470, by the relief passage 476. Relieve fuel pressure. According to such a relief function, it is possible to avoid an abnormal situation where the pressure of the fuel supplied to the internal combustion engine 3 becomes too high, and to guarantee the durability of the internal combustion engine.
- the relief passage 476 is integrated with the valves 473, 475 and the passages 470, 472, 474 at the specific location S, the diameter of the circumscribed circle C in contact with the outer periphery of the filter case 43 is reduced, thereby reducing the size of the device 1. Can be promoted in the radial direction of the case 43.
- the relief passage 476 opens with the passages 472 and 474 on the side surface 47a of the specific location S in the filter case 43, so that the configuration of the device 1 can be simplified.
- the circumscribed circle C that contacts the outer periphery of the filter case 43 including the outer periphery of the portion S. can be reliably reduced in diameter. According to this, it is possible to promote downsizing of the device 1 in the radial direction of the filter case 43.
- the ports 440, 441, 442 for allowing the fuel passage 470 to communicate with the outside of the filter case 43 are formed in the respective port members 44 joined to the specific location S in the filter case 43. According to this, not only the outer periphery of the filter case 43 including the outer periphery of the specific portion S but also the circumscribed circle C that also contacts the outer periphery of the port member 44 is reduced in diameter so that the device 1 can be downsized. It becomes possible to aim at radial direction. (Second embodiment) As shown in FIG. 5, the second embodiment of the present disclosure is a modification of the first embodiment.
- a flat space-like press-fit recess 2433 is formed around the opening of the folded portion 470 a in the lower portion of the case cap 2431.
- the joint plate 2477b of the valve housing 2477 is press-fitted into the recess 2433.
- the lower surface portion 2477bl and the upper surface portion 2477bu of the joining plate 2477b are both formed in a planar shape. With this shape, the lower surface portion 2477bl is joined to the inner peripheral edge portion of the press-fit recess 2433 and the upper surface portion 2430a of the case main body 2430 of the lower surface portion 2431a of the case cap 2431 by welding on the common virtual plane Icv. Yes.
- the joining plate 2477b sandwiched between the case body 2430 and the case cap 2431 and entered into the cap 2431 has a part of the upstream straight part 470b and a part of the downstream straight part 470c. Penetrates in the vertical direction.
- the steps as shown in FIG. 6 are sequentially executed.
- the joining plate 2477 b is press-fitted into the case cap 2431.
- the joint body 2477b and the case cap 2431 are overlapped on the common virtual plane Icv and welded to the case body 2430 while the housing body 477a is fitted.
- 2430, 2477b, and 2431 are joined.
- the external residual pressure holding valve 2473 is provided at the junction boundary B between the case body 2430 and the case cap 2431 in the filter case 2043 as shown in FIG.
- the third embodiment of the present disclosure is a modification of the first embodiment.
- the press-fitting recess 3433 of the third embodiment is formed in a flat space only around the upstream opening 432b corresponding to the upstream straight portion 470b in the upper part of the case body 3430.
- valve housing 3477 of the third embodiment is formed by integrally forming a joining flange 3477b instead of the joining plate 477b together with the housing main body 477a using a resin.
- the joint flange 3477b provided continuously with the upper portion of the housing main body 477a is formed in an annular collar shape along the outer periphery of the main body 477a.
- the joining flange 3477b is press-fitted into the press-fit recess 3433.
- the upper surface portion 3477bu and the lower surface portion 3477bl of the joining flange 3477b are both formed in a planar shape.
- the upper surface portion 3477bu is joined to the inner peripheral edge portion of the press-fit recess 3433 in the upper surface portion 3430a of the case body 3430 and the lower surface portion 431a of the case cap 431 by welding on the common virtual plane Icv. Yes.
- a part of the upstream straight portion 470b penetrates in the vertical direction in the joining flange 3477b sandwiched between the case main body 3430 and the case cap 431.
- the steps shown in FIG. 8 are sequentially performed.
- the housing main body 477a is fitted into the case main body 3430 and the joining flange 3477b is press-fitted.
- the case cap 431 is overlapped and welded to the case main body 3430 and the joint flange 3477b on the common virtual plane Icv, thereby joining the elements 431, 3430, and 3477b.
- the external residual pressure holding valve 3473 is provided at the junction boundary B between the case body 3430 and the case cap 431 in the filter case 3043.
- the fourth embodiment of the present disclosure is a modification of the third embodiment.
- the downstream straight portion 4470c of the fourth embodiment extends the most downstream end 4470d at the protrusion 4047 to a position lower than the branch passage 4474.
- the branch passage 4474 is provided so as to intersect with the downstream straight portion 4470c, particularly in the present embodiment, substantially orthogonal.
- the passage wall 4474a of the branch passage 4474 secures a passage cross-sectional area toward the most downstream end 4470d side between the passage wall 4470cw of the downstream straight portion 4470c entering by the intersection. .
- the relief passage 4476 of the fourth embodiment is formed in a stepped cylindrical hole shape at the lower end portion of the protrusion 4047 that extends downward from the branch passage 4474. Yes.
- the relief passage 4476 further extends in the axial direction of the filter case 4043 from the most downstream end 4470d of the fuel passage 4470.
- the port member 4044 of the fourth embodiment is joined to the protrusion 4047 of the filter case 4043 to form the discharge port 440 and the jet port 441, but the relief port 442 is formed.
- the relief valve 4443 of the fourth embodiment is provided in the relief passage 4476 in the filter case 4043 and communicates with the fuel passage 4470 to open and close the passage 4470. It functions as one of "multiple open / close valves". Further, the relief valve 4443 communicates with the internal space 26 of the sub tank 20 through the most downstream end 4476a of the relief passage 4476.
- the relief valve 4443 can discharge the guide fuel into the internal space 26 by guiding the fuel separated from the flow toward the internal combustion engine 3 in the filter case 4043 from the relief passage 4476. It has become.
- the operation of the relief valve 4443 is substantially the same as that of the relief valve 443 described in the first embodiment.
- the relief valve 4443 is also housed in the protrusion 4047 of the filter case 4043 so as to be biased toward the specific portion S in the circumferential direction. Therefore, the same operational effects as those of the first embodiment can be exhibited except for the operational effects relating to the side opening of the relief passage 476.
- the relief function of the relief valve 4443 that the filter case 4043 has integrally with the specific location S also avoids an abnormal situation in which the pressure of the fuel supplied to the internal combustion engine 3 becomes too high, thereby improving the durability of the internal combustion engine 3. It can be guaranteed.
- the fifth embodiment of the present disclosure is a modification of the fourth embodiment.
- the port member 5044 of the fifth embodiment is inclined from the tangential direction of the circular outline to the same surface 461a side with respect to the cylindrical outer peripheral surface 461a of the accommodating portion 46 of the filter case 4043, and protrudes from the protrusion 4047. ing.
- the port member 5044 forms the discharge port 5440 and the jet port 5441 along the outer peripheral surface 461a by this projecting form.
- the port member 5044 is joined to the specific portion S in the filter case 4043 having the outer peripheral surface 461a curved in a curved surface, so that the ports 5440 and 5441 are connected to the surface. It will be formed along 461a. According to this, it is possible to surely reduce the diameter of the circumscribed circle C that contacts both the outer periphery of the filter case 4043 and the outer periphery of the port member 5044, and promote the downsizing of the device 1 in the radial direction of the filter case 4043. . Other than that, the same effects as the fourth embodiment can be exhibited by the fifth embodiment. (Sixth embodiment) As shown in FIGS. 13 and 14, the sixth embodiment of the present disclosure is a modification of the fourth embodiment.
- the case main body 6430 forms a part of the folded portion 470a
- the case cap 6431 forms the remaining portion of the same portion 470a. Therefore, in the external residual pressure holding valve 6473 of the sixth embodiment, the joint flange 6477b of the valve housing 6477 is press-fitted into an intermediate portion that forms the upstream straight portion 470b below the folded portion 470a of the protrusion 4047. .
- case cap 6431 of the sixth embodiment is joined to the case main body 6430 by welding on the virtual plane Icv, so that the fuel opening 6432 that forms a part of the folded portion 470a of the main body 6430 is formed. It covers with the accommodation opening 432a.
- branch passage 6474 of the sixth embodiment branches from the upstream straight portion 470b to the side opposite to the most downstream end 4470d and does not intersect the downstream straight portion 4470c.
- the seventh embodiment of the present disclosure is a modification of the first embodiment.
- the pressure of the pressurized fuel discharged from the fuel pump 7042 of the seventh embodiment is variably adjusted within a range of 300 kPa to 600 kPa, for example.
- the accommodating portion 7046 of the seventh embodiment forms a relay passage 7465 that communicates with the accommodating chamber 463 in a substantially rectangular hole shape that is inclined with respect to the axial direction of the filter case 43 along the vertical direction.
- the relay passage 7465 communicates with the fuel outlet 463 a that opens below the fuel filter 464 in the accommodation chamber 463.
- the relay passage 7465 is inclined more obliquely upward as it is separated from the fuel outlet 463a in the radially outward direction.
- the inclined relay passage 7465 guides the fuel that is filtered by the fuel filter 464 and led out from the fuel outlet 463a obliquely upward.
- the fuel passage 7470 of the seventh embodiment forms a communication port 7470e so as to open at an intermediate portion in the vertical direction of the upstream straight portion 7470b.
- the upstream straight portion 7470b is disposed on the downstream side of the fuel filter 464 by allowing the communication port 7470e to communicate with the storage chamber 463 through the relay passage 7465. With this arrangement, the pressurized fuel guided through the relay passage 7465 is led out from the communication port 7470e to the upstream straight portion 7470b.
- the upstream straight portion 7470b forms an external passage portion 7470f where the communication port 7470e opens and an internal passage portion 7470g which communicates with the communication port 7470e via the external passage portion 7470f.
- the external passage portion 7470f and the internal passage portion 7470g are housed in the projecting portion 7047 together with the elements 471, 472, 7473, 7474, 7475, and 476 of the specific portion S.
- the external passage portion 7470f causes the fuel led out from the communication port 7470e to flow to the external residual pressure holding valve 7473 side above the port 7470e.
- the fuel flow direction in the relay passage 7465 is inclined with respect to the fuel flow direction in the external passage portion 7470f as shown in FIG.
- the cross-sectional area of the external passage portion 7470f is larger than the cross-sectional area of the relay passage 7465 that relays between the communication port 7470e and the storage chamber 463.
- the external passage portion 7470f having such an enlarged form guides the pressurized fuel from the communication port 7470e toward the downstream straight portion 470c in order to be discharged through the discharge passage 472.
- the fuel guided by the relay passage 7465 and led out from the communication port 7470e is returned to the internal residual pressure holding valve 7475 side through the external passage portion 7470f, and flows toward the internal passage portion 7470g.
- the fuel circulation direction in the relay passage 7465 is also inclined with respect to the fuel circulation direction in the internal passage portion 7470g.
- the passage sectional area of the inner passage portion 7470g is smaller than the passage sectional area of the relay passage 7465 and the passage sectional area of the outer passage portion 7470f. With such a reduced form, the fuel flow toward the internal residual pressure holding valve 7475 side in the internal passage portion 7470g is restricted more than in the external passage portion 7470f.
- the minimum passage cross-sectional area of the internal passage portion 7470g shown with cross-hatching shown in FIG. 19A is taken as the passage cross-sectional area of the cylindrical tube P shown with cross-hatching shown in FIG. 19B. , Convert virtually.
- the passage diameter D of the cylindrical pipe P obtained from the converted passage cross-sectional area and the length L of the internal passage portion 7470g that is the distance from the external passage portion 7470f to the internal residual pressure holding valve 7475 shown in FIG. Is set so as to satisfy the relational expression of L / D ⁇ 3.
- the reason why the passage diameter D and the length L are set so as to satisfy the relational expression L / D ⁇ 3 will be described in detail later.
- the internal residual pressure holding valve 7475 located on the downstream side of the internal passage portion 7470g is disposed to be spaced downward from the external residual pressure holding valve 7473 as shown in FIGS.
- a communication port 7470e is opened at a position R that is displaced from the internal residual pressure holding valve 7475 to the external residual pressure holding valve 7473 side, and more than the position deviation position R.
- An internal passage portion 7470g is opened downward.
- the opening of the internal passage portion 7470g is located in a separation portion Q of the external passage portion 7470f that is spaced radially outward from the relay passage 7465 with the internal residual pressure holding valve 7475 interposed therebetween. Is provided.
- the configuration of the fuel passage 7470 other than that described above conforms to the configuration of the fuel passage 470 described in the first embodiment.
- the external residual pressure holding valve 7473 which is a springless check valve as one of “a plurality of on-off valves”, is more than the communication port 7470e in the upstream straight portion 470b.
- the external passage portion 7470 f is provided on the downstream side and on the upstream side of the discharge passage 472. That is, the external residual pressure holding valve 7473 is disposed in the middle of the fuel passage 7470 from the communication port 7470e toward the discharge passage 7472.
- the external residual pressure holding valve 7473 includes a valve stopper 7479 together with the valve housing 477 and the valve element 478 described in the first embodiment.
- the valve stopper 7479 is formed of a resin in a cylindrical shape, and is coaxially fixed in the housing main body 477a.
- the valve stopper 7479 supports the valve element 478 so as to be able to reciprocate.
- the valve stopper 7479 locks the valve element 478 at the time of valve opening separated from the valve seat 477as.
- the external residual pressure holding valve 7473 opens and closes the fuel passage 7470. Specifically, as the fuel pump 7042 is operated, the valve element 478 of the external residual pressure holding valve 7473 is opened while the pressurized fuel is led out from the communication port 7470e to the external passage portion 7470f. When the valve is opened, the pressurized fuel led out to the external passage portion 7470f moves toward the most downstream end 470d side of the discharge passage 472 and the downstream straight portion 470c while the valve element 478 is locked to the valve stopper 7479. Fluid. On the other hand, the valve element 478 is closed when the fuel pump 7042 stops and the fuel is stopped from being led out from the communication port 7470e.
- the closed external residual pressure holding valve 7473 provides a residual pressure holding function for the fuel supplied to the internal combustion engine 3 through the fuel passage 7470.
- the holding pressure by the residual pressure holding function of the external residual pressure holding valve 7473 is the pressure that was adjusted when the fuel pump 7042 was stopped.
- the configuration of the external residual pressure holding valve 7473 other than that described above conforms to the configuration of the external residual pressure holding valve 473 described in the first embodiment.
- the branch passage 7474 is a space extending from the portion sandwiched between the relay passage 7465 and the internal passage portion 7470g at the radially spaced apart portion Q in the protrusion 7047 to the port member 44 side. Is formed.
- the branch passage 7474 branches from the lower end of the internal passage portion 7470g opposite to the external passage portion 7470f so as to be folded upward.
- the branch passage 7474 having such a branching shape does not intersect the downstream straight portion 470c.
- the branch passage 7474 opens to the side surface 47a of the projection 7047 and communicates with the jet port 441, thereby guiding the fuel discharged from the internal passage portion 7470g through the internal residual pressure holding valve 7475 to the jet pump 45. .
- the fuel thus guided flows into the nozzle passage 7455 whose passage cross-sectional area is narrower than that of the upstream internal passage portion 7470g and the pressurization passage 454.
- the flow rate is reduced and ejected into the diffuser passage 457.
- the diffuser passage 457 having a large-diameter circular cross section is aligned with the nozzle passage 7455 having a circular small cross-section.
- an umbrella valve 7027 that opens the inlet 24 when a negative pressure from the jet pump 45 is applied. Is provided.
- an internal residual pressure holding valve 7475 that is a spring-biased check valve is provided in the branch passage 7474 as another one of the “plurality of on-off valves”.
- the internal residual pressure holding valve 7475 has a valve housing 7475a, a valve element 7475b, and a valve spring 7475c.
- the valve housing 7475a is formed in a stepped cylindrical shape from a metal composite material, and is fitted into the protrusion 7047. A part of the branch passage 7474 passes through the valve housing 7475a.
- the valve housing 7475a forms a planar valve seat 7475as in the branch passage 7474.
- an annular plate-like flange portion 7475af is provided so as to overlap the lower portion of the relay passage 7465 and the lower portion of the internal passage portion 7470g. Accordingly, the internal residual pressure holding valve 7475 is positioned by the protrusion 7047 and the apparatus 1 is downsized.
- the valve element 7475b is formed in a cylindrical shape from a metal composite material, and is coaxially accommodated in the valve housing 7475a. With this accommodation form, the valve element 7475b can be separated from and seated on the valve seat 7475as by reciprocating movement. Therefore, the internal residual pressure holding valve 7475 opens in response to the valve element 7475b separating from the valve seat 7475as, and closes in response to the valve element 7475b seating on the valve seat 7475as.
- the valve spring 7475c is formed of a metal in a coil shape, and is coaxially locked in the valve housing 7475a.
- the valve spring 7475c biases the valve element 7475b toward the valve seat 7475as by a spring reaction force.
- the internal residual pressure holding valve 7475 opens and closes the fuel passage 7470 that communicates with the branch passage 7474.
- the valve element 7475 b of the internal residual pressure holding valve 7475 is connected to the valve spring 7475 c while the fuel of the set pressure or higher is led out from the communication port 7470 e to the passage portions 7470 f and 7470 g.
- the valve opens against the spring reaction force.
- the valve element 7475b is closed by the spring reaction force.
- the pressure of the fuel in the storage chamber 463 is also taken into account when the delivery valve 421 is closed. Is held at the set pressure of the internal residual pressure holding valve 7475. That is, the internal pressure maintaining valve 7475 which is closed provides a residual pressure maintaining function for the staying fuel in the storage chamber 463.
- the holding pressure by the residual pressure holding function of the internal residual pressure holding valve 7475 is set to be 250 kPa, for example.
- the valve element 7475b has a pressure pulsation generated by the fuel pumping from the fuel pump 7042 when the lift amount (separation amount) from the valve seat 7475as is small.
- the passage diameter D of the cylindrical pipe P converted from the passage sectional area of the internal passage portion 7470g and the length L of the passage portion 7470g are L / D ⁇ 3. Is set so as to satisfy the relational expression. As a result of such setting, the vibration of the valve element 7475b due to pressure pulsation is attenuated to substantially zero level as time passes, as shown in FIG.
- the relief valve 7443 which is a spring-biased check valve is provided in the relief port 442.
- the relief valve 7443 communicates with the fuel passage 7470 through a relief passage 476 that opens to the side surface 47 a of the projection 7047.
- the relief valve 7443 communicates with the internal space 26 of the sub tank 20 through the most downstream end 442a of the relief port 442, so that the guide fuel from the relief passage 476 to the relief port 442 can be discharged to the space 26.
- the relief valve 7443 includes a valve retainer 7443a, a valve element 7443b, and a valve spring 7443c.
- valve retainer 7443a is formed in a cylindrical shape from resin and is fitted into the port member 44.
- the valve retainer 7443a passes through the most downstream end 442a downstream of the stepped portion of the relief port 442 that forms the valve seat 7442s in a planar shape.
- the valve element 7443b is formed in a disc shape from a composite material of resin and rubber, and is accommodated coaxially in the relief port 442. With this accommodation form, the valve element 7443b can be separated from and seated on the valve seat 7442s by reciprocating movement. Accordingly, the relief valve 7443 is opened in response to the valve element 7443b being separated from the valve seat 7442s, and is closed in response to the valve element 7443b being seated on the valve seat 7442s.
- the valve spring 7443c is formed in a coil shape from metal.
- the valve spring 7443c is accommodated coaxially in the relief port 442, and is locked by the valve retainer 7443a.
- the valve spring 7443c urges the valve element 7443b toward the valve seat 7442s by a spring reaction force.
- the relief valve 7443 opens and closes the fuel passage 7470 that communicates with the relief port 442 via the relief passage 476. Specifically, while the normal state of the fuel supply path from the fuel passage 7470 to the internal combustion engine 3 is maintained and the pressure of the relief port 442 becomes less than the relief pressure regardless of the operation and stop of the fuel pump 7042, The valve element 7443b of the relief valve 7443 is closed by the spring reaction force of the valve spring 7443c. The fuel pressure-adjusted by the operation of the fuel pump 7042 when the valve is closed is discharged through the discharge passage 472 in the filter case 43 and the discharge port 440 outside the case 43, thereby supplying fuel to the internal combustion engine 3 side. Become.
- the valve element 7443b is The valve opens against the spring reaction force.
- the guide fuel to the relief valve 7443 is discharged into the internal space 26 of the sub tank 20 while the valve element 7443b is elastically supported by the valve spring 7443c. Relieved until pressure reaches relief pressure. That is, the relief function by the opened relief valve 7443 is exerted on the fuel supplied to the internal combustion engine 3 side.
- the relief pressure by the relief function of the relief valve 7443 is set to be 650 kPa, for example.
- the external residual pressure holding valve 7473 is a springless type having a valve element 478 that is opened by the operation of the fuel pump 7042 and is locked to the valve stopper 7479. For this reason, even if pressure pulsation occurs due to fuel pumping from the fuel pump 7042, the locked valve element 478 is unlikely to vibrate.
- the internal residual pressure holding valve 7475 is a spring-biased type having a valve element 7475b that opens against the spring reaction force when the fuel pump 7042 is operated.
- the communication port 7470e communicating with the storage chamber 463 on the downstream side of the fuel filter 464 is retained from the internal residual pressure holding valve 7475.
- An opening is made at a position R where the valve 7473 is displaced.
- the length L can be increased to satisfy the equation.
- the pressure pulsation generated by the fuel pumping from the fuel pump 7042 can be damped by the internal passage portion 7470g which is narrowed down to the spring biased valve 7475.
- the vibration of element 7475b can also be damped.
- the communication port 7470e relayed between the storage chamber 463 and the storage passage 465 is opened at the misalignment location R.
- the length L can be increased so as to satisfy the relational expression of L / D ⁇ 3 for the internal passage portion 7470g for restricting the fuel flow from the communication port 7470e to the valve 7475
- the length of the relay passage 7465 from 463 to the same port 7470e can also be increased.
- the pressure pulsation generated by the fuel pumping from the fuel pump 7042 can be attenuated by the long relay passage 7465 and the long internal passage portion 7470g until it goes to the spring biased valve 7475. . Therefore, the noise reduction effect can be enhanced.
- the communication port 7470e that opens to the external passage portion 7470f at the misalignment location R communicates with the internal passage portion 7470g via the passage portion 7470f.
- the fuel flow in the internal passage portion 7470g is narrower than that in the external passage portion 7470f, the flow rate of fuel flowing through the external passage portion 7470f for the discharge to the internal combustion engine 3 side is secured while the internal flow portion 7470g is secured. Noise can be reduced by attenuating the pressure pulsation at the passage portion 7470g.
- the internal passage portion 7470g opens in a separation portion Q between the relay passage 7465 and the valve 7475 in the external passage portion 7470f.
- the distance from the communication port 7470e to the location Q in the passage portion 7470f can be increased along with the length of the relay passage 7465.
- the pressure pulsation generated by the fuel pumping from the fuel pump 7042 is long between the long relay passage 7465 and each of the locations R and Q where the distance is secured until the pressure pulsation is directed to the spring biased valve 7475. It can be attenuated by the narrowed internal passage portion 7470g. Therefore, the noise reduction effect can be enhanced.
- the fuel flow direction in the relay passage 7465 is inclined with respect to the fuel flow direction in the internal passage portion 7470g.
- the fuel flow from the relay passage 7465 toward the internal passage portion 7470g through the external passage portion 7470f is smoothly turned back, so that the fuel flow is separated from the inner wall surfaces forming the passage portions 7470f and 7470g. It becomes difficult to do. Therefore, it is possible to suppress the generation of a negative pressure due to such separation of the fuel flow and causing noise.
- the relief valve 7443 is supplied to the internal combustion engine 3 side by guiding the fuel, which is divided from the flow toward the internal combustion engine 3 side in the fuel passage 7470, by the relief passage 476. Relieve fuel pressure. According to such a relief function, the durability of the internal combustion engine 3 can be guaranteed.
- a relief valve 7443 of a spring bias type in which the valve element 7443b is opened against the spring reaction force for pressure relief is provided with a relief from the downstream side of the external residual pressure holding valve 7473 in the fuel passage 7470. Fuel is guided through the passage 476.
- the valve 7443 can suppress the pressure pulsation from being amplified by the vibration of the valve element 7443b. As a result, it is possible to enhance the effect of reducing noise generated in the path from the fuel passage 7470 to the internal combustion engine 3.
- the jet pump 45 of the seventh embodiment further squeezes and ejects the exhausted fuel that has passed through the valve 7475 from the internal passage portion 7470g that has been throttled long by satisfying the relational expression of L / D ⁇ 3.
- the fuel in the fuel tank 2 is transferred around the fuel pump 7042.
- the fuel whose pressure pulsation is attenuated can be ejected by the internal passage portion 7470g, so that the fuel transfer function can be stably exhibited and the fuel ejection is intermittently caused to humans. Can suppress the generation of annoying noise.
- the eighth embodiment of the present disclosure is a modification of the seventh embodiment.
- the pressure of the pressurized fuel discharged from the fuel pump 8042 of the eighth embodiment is fixed at, for example, 400 kPa.
- the fuel passage 8470 of the eighth embodiment has a straight, substantially rectangular shape so as to extend linearly in the axial direction of the filter case 43 along the vertical direction at the protrusion 8047. It is formed in a hole shape.
- a communication port 7470e is formed in the middle of the fuel passage 8470 in the vertical direction.
- the fuel passage 8470 is disposed on the downstream side of the fuel filter 464 by connecting the communication port 7470e with the accommodation chamber 463 via the relay passage 7465 of FIG. With this arrangement, the pressurized fuel guided through the relay passage 7465 is led out to the fuel passage 8470 from the communication port 7470e.
- the external passage portion 7470f and the internal passage portion 7470g formed in the fuel passage 8470 are accommodated in the protrusion 8047 together with the elements 8472, 7474, 8475, 8476, 8479 of the specific locations S shown in FIGS. Yes.
- the derived fuel from the communication port 7470e flows to the discharge passage 8472 side above the same port 7470e. Circulate.
- a communication port 7470e is opened at a location R that is displaced from the valve 8475 toward the discharge passage 8472. Further, as shown in FIGS. 22 and 24, the opening of the internal passage portion 7470g is located in a separation portion Q of the external passage portion 7470f that is spaced radially outward from the relay passage 7465 with the internal residual pressure holding valve 8475 interposed therebetween. Is provided.
- the configuration of the fuel passage 8470 other than that described above conforms to the configuration of the fuel passage 7470 described in the seventh embodiment. Therefore, the passage diameter D of the cylindrical pipe P hypothesized from the passage cross-sectional area of the internal passage portion 7470g and the length L of the internal passage portion 7470g from the external passage portion 7470f to the internal residual pressure holding valve 7475 (FIG. 22). In the eighth embodiment, the relational expression L / D ⁇ 3 is satisfied.
- the discharge passage 8472 of the eighth embodiment is formed in a cylindrical shape that is provided in an intermediate portion in the vertical direction of the protrusion 8047 and is positioned above the communication port 7470e.
- the discharge passage 8472 branches from the downstream side of the communication port 7470e in the external passage portion 7470f of the fuel passage 8470 in a direction orthogonal to the axial direction of the filter case 43. Note that the configuration of the discharge passage 8472 other than that described above conforms to the configuration of the discharge passage 472 described in the first embodiment.
- the spring reaction force is set for the valve spring 8475c that constitutes the internal residual pressure holding valve 8475 as one of “a plurality of on-off valves” together with the elements 7475a and 7475b.
- the internal residual pressure holding valve 8475 is opened, the pressure of the pressurized fuel from the external passage portion 7470f toward the discharge passage 8472 is adjusted to, for example, 400 kPa.
- the pressurized fuel that has flowed into the branch passage 7474 from the internal passage portion 7470g flows toward the jet pump 45 and the relief valve 8479, and the circulation is performed by closing the internal residual pressure holding valve 8475. Sometimes stopped.
- the holding pressure by the residual pressure holding function of the closed internal residual pressure holding valve 8475 is, for example, 400 kPa.
- the configuration of the internal residual pressure holding valve 8475 other than that described above is in accordance with the configuration of the internal residual pressure holding valve 7475 described in the seventh embodiment.
- the relief passage 8476 of the eighth embodiment is formed in a stepped cylindrical hole shape in an intermediate portion located between the vertical discharge passage 8472 and the internal residual pressure holding valve 8475 in the protrusion 8047.
- the relief passage 8476 branches from the downstream side of the internal residual pressure holding valve 8475 in the branch passage 7474 in the direction orthogonal to the axial direction of the filter case 43, and the relief valve 8479 is opposite to the branch portion. Communicate. With this communication form, the relief passage 8476 guides the fuel discharged from the internal passage portion 7470g through the internal residual pressure holding valve 8475 to the relief valve 8479.
- the relief valve 8479 of the eighth embodiment which is a spring-biased check valve, is provided in the relief passage 8476.
- the relief valve 8479 communicates with the internal space 26 of the sub tank 20 through the relief passage 8476 so that the guide fuel in the passage 8476 can be discharged to the space 26.
- the relief valve 8479 has a valve element 8479b and a valve spring 8479c.
- the valve element 8479b is formed in a disk shape by a composite material of resin and rubber.
- the valve element 8479b is coaxially accommodated in the most downstream end 8476a on the downstream side of the stepped portion that forms the valve seat 8476s in a planar shape in the relief passage 8476.
- the valve element 8479b can be separated from and seated on the valve seat 8476s by reciprocating movement. Therefore, the relief valve 8479 opens in response to the valve element 8479b separating from the valve seat 8476s, and closes in response to the valve element 8479b seating on the valve seat 8476s.
- the valve spring 8479c is formed in a coil shape from metal, and is coaxially locked in the relief passage 8476.
- the valve spring 8479c urges the valve element 8479b toward the valve seat 8476s by a spring reaction force.
- the relief valve 8479 opens and closes the fuel passage 8470 that communicates with the relief passage 8476 via the branch passage 7474. Specifically, regardless of whether the fuel pump 8042 is activated or stopped, while the internal residual pressure holding valve 8475 is closed and the pressure in the relief passage 8476 is less than the relief pressure, the valve element 8479b of the relief valve 8479 is The valve is closed by the spring reaction force of the spring 8479c. When the valve is closed, the internal residual pressure holding valve 8475 is also in the closed state, so that no fuel flows to the jet pump 45 side.
- the valve element 8479b resists the spring reaction force. Then open the valve.
- the valve is opened, fuel is discharged from the internal passage portion 7470g through the internal residual pressure holding valve 8475 to the internal space 26 of the sub tank 20 while the valve element 8479b is elastically supported by the valve spring 8479c.
- the relief pressure toward the jet pump 45 is released until it reaches the relief pressure. That is, the relief function is exhibited by the opened relief valve 8479 for the fuel discharged from the fuel passage 8470 by the internal residual pressure holding valve 8475.
- the relief pressure by the relief function of the relief valve 8479 is set to be 50 kPa, for example.
- the most downstream end 8476a of the relief passage 8476 is opposed to the inner peripheral surface 8020e of the sub tank 20 containing the pump unit 40 including the fuel pump 8042, the filter case 43, and the like. It is open.
- the fuel discharged from the relief valve 8479 flows into the internal space 26 of the sub tank 20 through the most downstream end 8476a of the relief passage 8476. Therefore, in order to release the flow of the fuel discharged from the relief valve 8479 through the most downstream end 8476a in the lateral direction, the inner peripheral surface 8020e of the sub tank 20 protrudes in a mountain shape at a position facing the most downstream end 8476a.
- the rectifying unit 8020f is formed.
- the port member 8044 of the eighth embodiment integrally has a discharge port 8440 and a jet port 441 outside the filter case 43. That is, the port member 8044 is not provided with the relief port 442 and the relief valve 7443.
- the discharge port 8440 functions as one of “a plurality of fuel ports”. For this function, the discharge port 8440 is flexibly formed along the outer peripheral surface 461a of the outer cylindrical portion 461 that is curved in a cylindrical surface shape in the filter case 43, and the most downstream end 8440a is directed in the lateral direction so as to be flexible. It communicates with the tube 12a (see FIG. 22).
- the horizontal direction to which the most downstream end 8440a of the discharge port 8440 is directed is slightly inclined upward from the direction orthogonal to the axial direction of the filter case 43 along the vertical direction.
- the discharge port 8440 communicates with the discharge passage 8472 opened on the side surface 47a of the protrusion 8047 on the side opposite to the most downstream end 8440a as shown in FIG.
- the configurations of the port member 8044 and the discharge port 8440 other than those described above are the same as the configurations of the port member 44 and the discharge port 440 described in the first embodiment.
- the internal residual pressure holding valve 8475 is a spring biased type having a valve element 7475b that opens against the spring reaction force in accordance with the operation of the fuel pump 8042.
- the communication port 7470 e communicating with the storage chamber 463 on the downstream side of the fuel filter 464 is connected from the valve 8475 to the passage 8472.
- An opening is made at a position R where the position is shifted to the side.
- the L / D is increased with respect to the internal passage portion 7470 g that restricts the fuel flow from the opening 7470 e to the valve 8475 side, rather than the external passage portion 7470 f toward which the fuel flows from the communication port 7470 e toward the passage 8472.
- the length L can be increased to satisfy the relational expression ⁇ 3.
- the pressure pulsation generated by the fuel pumping from the fuel pump 8042 can be attenuated by the internal passage portion 7470g that is narrowed down to the spring biased valve 8475. Therefore, the vibration of the valve element 7475b in the valve 8475 can also be damped.
- the pressure of the fuel discharged from the internal passage portion 7470g through the internal residual pressure holding valve 8475 increases due to, for example, the throttle action of the discharged fuel by the jet pump 45, for example. However, it is released by the relief valve 8479. According to such a relief function, the pressure adjustment function of the valve 8475 for adjusting the pressure of the fuel toward the discharge passage 8472, that is, the pressure of the discharged fuel toward the internal combustion engine 3, can be stably exhibited. Further, fuel from the internal passage portion 7470g reaches the spring biased valve 8479 in which the valve element 8479b is opened against the spring reaction force for pressure relief.
- the port member 8044 is joined to the specific portion S in the filter case 43 having the outer peripheral surface 461a curved in a curved shape, so that the discharge port 8440 is aligned along the surface 461a. Will form. According to this, it is possible to reliably reduce the diameter of the circumscribed circle C that contacts both the outer periphery of the filter case 43 and the outer periphery of the port member 8044, and promote downsizing of the device 1 in the radial direction of the filter case 43. .
- the most downstream end 8476a of the relief passage 8476 opening toward the inner peripheral surface 8020e of the sub tank 20 faces the rectifying unit 8020f of the tank 20.
- a non-accommodating portion that does not accommodate the fuel filter 464 in the filter cases 43, 2043, 3043, 4043, and 6043 is provided in a part in the circumferential direction.
- the non-accommodating portion may be set at the specific location S.
- the external residual pressure holding valves 3473 and 6473 or the internal residual pressure holding valve 475 may be provided at a place other than the specific place S.
- the external residual pressure holding valves 3473 and 6473 may be provided in the discharge ports 440 and 5440, for example.
- the internal residual pressure holding valve 475 may be provided in the jet ports 441, 5441, for example.
- the external residual pressure holding valve 473, 6473 or the internal residual pressure holding valve 475 may not be provided.
- the relief port 442 in which the relief passage 4476 is communicated and the relief valve 4443 is provided may be formed in the port members 4044 and 5044 according to the first embodiment.
- the relief valves 443, 4443, and 7443 may not be provided.
- the jet pump 45 may not be provided.
- the ports 441, 5441 may or may not be formed on the port members 44, 4044, 5044, 8044.
- the discharge ports 440, 5440, 8440 are not formed in the port members 44, 4044, 5044, 8044, and the discharge passages 472, 8472 are directly connected to the flexible tube 12a. You may let them.
- the jet ports 441, 5441 are not formed in the port members 44, 4044, 5044, 8044, and the branch passages 474, 4474, 6474, 7474 are added to the jet pump 45. It may be directly communicated.
- the relief valves 443 and 7443 are formed in the relief passage 476 without forming the relief port 442 in the port member 44 according to the fourth embodiment. It may be provided.
- any one of the passages 472, 474, 476, 4474, 6474, 7474, 8472 is replaced with the port member 44 of the filter cases 43, 2043, 3043, 4043, 6043. You may make it open in surfaces other than the joint side surface 47a with 4044, 5044, and 8044.
- the fuel passages 470, 4470, 7470 may be formed in a shape that is not folded back in the axial direction.
- the ports 440, 441, and 442 may be formed along the outer peripheral surface 461a according to the fifth embodiment.
- the fuel outlet 463a of the storage chamber 463 may be substantially coincident with the communication port 7470e without providing the relay passage 7465 in the filter case 43.
- the fuel flow direction in the relay passage 7465 is set to be substantially orthogonal to or substantially parallel to the fuel flow direction in the internal passage portion 7470g. May be.
- internal residual pressure holding valves 7475 and 8475 are provided at spaced locations Q spaced from the relay passage 7465 with the internal passage portion 7470g interposed therebetween, and the external passage portion 7470f Of these, the internal passage portion 7470g may be opened at a location closer to the relay passage 7465 than the separation portion Q.
- the communication port 7470e is opened to the internal passage portion 7470g at the misalignment point R, so that the external passage portion 7470f is connected to the internal passage portion 7470g. The communication port 7470e may be communicated.
- a non-accommodating portion that does not accommodate the fuel filter 464 in the filter case 43 is provided in a part of the circumferential direction in a configuration in which the protrusions 7047 and 8047 are not provided.
- the non-contained portion may be set as the specific location S.
- the rectifying unit 8020f may not be provided.
- the most downstream end 8440a of the discharge port 8440 may be directed upward in accordance with the first embodiment.
- the most downstream ends of the discharge ports 440 and 5440 may be directed in the lateral direction according to the eighth embodiment.
- electromagnetically driven relief valves 443, 4443, 7443, 8479 such as solenoid valves may be provided.
- fuel other than that discharged from the fuel passages 470, 4470, 7470, 8470 through the internal residual pressure holding valves 475, 7475, 8475 is jetted in the jet pump 45.
- the jet pump 45 May be.
- exhaust fuel from the fuel pumps 42, 7042, and 8042, return fuel from the internal combustion engine 3 side, and the like are employed as the fuel for ejection from the jet pump 45.
- port members 44, 4044, 5044, 8044 divided for each of the ports 440, 5440, 8440, 441, 5441, 442 may be adopted.
- a port member 44 divided corresponding to one and two of the ports 440, 441, and 442 may be employed.
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Abstract
Description
(第一実施形態)
図1,2に示すように、本開示の第一実施形態による燃料供給装置1は、車両の燃料タンク2に搭載される。装置1は、燃料タンク2内の燃料を、内燃機関3の燃料噴射弁へ直接的に又は高圧ポンプ等を介して間接的に供給する。ここで、装置1の搭載される燃料タンク2は、樹脂又は金属により中空状に形成されることで、内燃機関3側へ供給する燃料を貯留する。また、装置1から燃料を供給する内燃機関3としては、ガソリンエンジンであってもよいし、ディーゼルエンジンであってもよい。尚、図1,2に示す装置1の上下方向は、水平面上における車両の上下方向と実質一致している。
以下、装置1の構成及び作動を説明する。
以上説明した第一実施形態の作用効果を、以下に説明する。
(第二実施形態)
図5に示すように本開示の第二実施形態は、第一実施形態の変形例である。第二実施形態において、ケースキャップ2431の下部のうち折り返し部470aの開口部周囲には、扁平形空間状の圧入凹部2433が形成されている。凹部2433に対して、バルブハウジング2477の接合プレート2477bが圧入されている。ここで、接合プレート2477bの下面部2477blと上面部2477buとは、いずれも平面状に形成されている。かかる形状により下面部2477blは、ケースキャップ2431の下面部2431aのうち圧入凹部2433の内周縁部と、ケース本体2430の上面部2430aとに対して、共通仮想平面Icv上での溶着により接合されている。これらの圧入及び接合形態下、ケース本体2430及びケースキャップ2431間に挟持されて同キャップ2431内へと入り込んだ接合プレート2477bには、上流ストレート部470bの一部と下流ストレート部470cの一部とが上下方向に貫通している。
(第三実施形態)
図7に示すように本開示の第三実施形態は、第一実施形態の変形例である。第三実施形態の圧入凹部3433は、ケース本体3430の上部のうち上流ストレート部470bの対応位置となる上流開口部432bの周囲のみに、扁平形空間状に形成されている。
(第四実施形態)
図9,10に示すように本開示の第四実施形態は、第三実施形態の変形例である。第四実施形態の下流ストレート部4470cは、突部4047において最下流端4470dを、分岐通路4474よりも下方にまで延長させている。かかる延長形態により分岐通路4474は、下流ストレート部4470cと交差、特に本実施形態では実質直交して設けられている。ここで図10に示すように、分岐通路4474の通路壁4474aは、交差により入り込んだ下流ストレート部4470cの通路壁4470cwとの間に、最下流端4470d側への通路断面積を確保している。
(第五実施形態)
図12に示すように本開示の第五実施形態は、第四実施形態の変形例である。第五実施形態のポート部材5044は、フィルタケース4043の収容部46のうち円筒面状の外周面461aに対して、その円形輪郭の接線方向から同面461a側に傾いて、突部4047から張り出している。かかる張り出し形態によりポート部材5044は、吐出ポート5440とジェットポート5441とを、外周面461aに沿って形成している。
(第六実施形態)
図13,14に示すように本開示の第六実施形態は、第四実施形態の変形例である。第六実施形態のフィルタケース6043では、ケース本体6430が折り返し部470aの一部を形成し、ケースキャップ6431が同部470aの残部を形成している。そこで、第六実施形態の外部残圧保持バルブ6473においてバルブハウジング6477の接合フランジ6477bは、突部4047のうち折り返し部470aの下方にて上流ストレート部470bを形成する中間部に、圧入されている。
(第七実施形態)
図15に示すように本開示の第七実施形態は、第一実施形態の変形例である。第七実施形態の燃料ポンプ7042から吐出される加圧燃料の圧力は、例えば300kPa~600kPaの範囲内で可変調整される。
(第八実施形態)
図22に示すように本開示の第八実施形態は、第七実施形態の変形例である。第八実施形態の燃料ポンプ8042から吐出される加圧燃料の圧力は、例えば400kPaに固定される。
(他の実施形態)
以上、本開示の複数の実施形態について説明したが、本開示は、それらの実施形態に限定して解釈されるものではなく、本開示の要旨を逸脱しない範囲内において種々の実施形態及び組み合わせに適用することができる。
Claims (23)
- 燃料ポンプ(42,7042,8042)と、燃料フィルタ(464)を収容するフィルタケース(43,2043,3043,4043,6043)とを、備え、前記燃料ポンプにより燃料タンク(2)内から圧送された燃料を、前記燃料フィルタにより濾過して前記フィルタケース内から内燃機関(3)側へ供給する燃料供給装置であって、
前記フィルタケースは、
前記燃料フィルタよりも下流側にて燃料を流通させる燃料通路(470,4470,7470,8470)と、
前記燃料通路の流通燃料を前記内燃機関側へ向かって吐出する吐出通路(472,8472)と、
前記燃料通路を開閉する複数の開閉バルブ(473,2473,3473,6473,7473,475,7475,8475,4443,8479)とを、周方向の特定箇所(S)に偏って一体に有する燃料供給装置。 - 前記燃料通路と前記吐出通路と前記複数の開閉バルブとは、前記フィルタケースのうち前記燃料フィルタの収容箇所(46,7046)から前記特定箇所へ向かって突出する突部(47,4047,7047,8047)に、収められる請求項1に記載の燃料供給装置。
- 前記フィルタケースは、前記燃料フィルタの収容箇所(46,7046)における燃料の圧力を前記燃料ポンプの停止に伴って保持する内部残圧保持バルブ(475,7475,8475)を、前記開閉バルブの一つとして有する請求項1又は2に記載の燃料供給装置。
- 前記燃料通路から前記内部残圧保持バルブを通して排出される燃料を噴出させることにより、前記燃料タンク内の燃料を前記燃料ポンプの周囲へ移送するジェットポンプ(45)を、備える請求項3に記載の燃料供給装置。
- 前記フィルタケースは、
前記吐出通路からの吐出により前記内燃機関側へ供給された燃料の圧力を前記燃料ポンプの停止に伴い保持する外部残圧保持バルブ(473,2473,3473,6473)を、前記開閉バルブの一つとして有すると共に、
前記外部残圧保持バルブよりも上流側にて前記燃料通路から分岐することにより、前記燃料通路からの排出燃料を前記ジェットポンプへ案内する分岐通路(474,4474,6474)を、前記特定箇所に一体に有する請求項4に記載の燃料供給装置。 - 前記内部残圧保持バルブは、前記分岐通路に設けられる請求項5に記載の燃料供給装置。
- 前記フィルタケースは、前記吐出通路からの吐出により前記内燃機関側へ供給された燃料の圧力を前記燃料ポンプの停止に伴い保持する外部残圧保持バルブ(473,2473,3473,6473,7473)を、前記開閉バルブの一つとして有する請求項1~4のいずれか一項に記載の燃料供給装置。
- 前記吐出通路からの吐出により前記内燃機関側へ供給された燃料の圧力を逃がすリリーフバルブ(443,4443,7443)と、
前記燃料通路から排出される燃料を噴出させることにより、前記燃料タンク内の燃料を前記燃料ポンプの周囲へ移送するジェットポンプ(45)とを、備え、
前記フィルタケースは、
前記燃料通路にて前記内燃機関側へ向かう流れとは分流された燃料を、前記リリーフバルブへ案内するリリーフ通路(476,4476)と、
前記燃料通路から分岐することにより、前記燃料通路からの排出燃料を前記ジェットポンプへ案内する分岐通路(474,4474,6474,7474)とを、前記特定箇所に一体に有する請求項1~7のいずれか一項に記載の燃料供給装置。 - 前記吐出通路と前記リリーフ通路(476)と前記分岐通路(474,7474)とは、前記フィルタケース(43,2043,3043)のうち前記特定箇所の側面(47a)に開口する請求項8に記載の燃料供給装置。
- 前記フィルタケース(4043,6043)は、前記吐出通路からの吐出により前記内燃機関側へ供給された燃料の圧力を逃がすリリーフバルブ(4443)を、前記開閉バルブの一つとして有する請求項1~9のいずれか一項に記載の燃料供給装置。
- 前記吐出通路からの吐出により前記内燃機関側へ供給された燃料の圧力を逃がすリリーフバルブ(443,4443,7443)を、備え、
前記リリーフバルブに通じる前記燃料通路は、前記フィルタケース(43,2043,3043,4043,6043)の軸方向にて折り返される請求項1~10のいずれか一項に記載の燃料供給装置。 - 前記フィルタケースのうち前記特定箇所に接合されるポート部材(44,4044,5044,8044)を、備え、
前記ポート部材は、前記燃料通路を前記フィルタケース外に通じさせる燃料ポート(440,5440,8440,441,5441,442)が、一体に形成されている請求項1~11のいずれか一項に記載の燃料供給装置。 - 前記フィルタケース(43,4043)は、曲面状に湾曲する外周面(461a)を、有し、
前記ポート部材(5044,8044)は、前記外周面に沿って前記燃料ポート(5440,8440,5441)が形成されている請求項12に記載の燃料供給装置。 - 前記燃料通路(7470)は、前記フィルタケース(43)のうち前記燃料フィルタを収容する収容室(463)に対して前記燃料フィルタよりも下流側にて連通する連通口(7470e)を有し、前記連通口から燃料を流通させ、
前記開閉バルブの一つは、前記吐出通路(472)からの吐出により前記内燃機関側へ供給された燃料の圧力を前記燃料ポンプ(7042)の停止に伴い保持するスプリングレス式の外部残圧保持バルブ(7473)として、前記燃料ポンプの作動に伴い開弁してバルブストッパ(7479)に係止されるバルブエレメント(478)を有した外部残圧保持バルブであり、
前記開閉バルブの別の一つは、前記収容室における燃料の圧力を前記燃料ポンプの停止に伴い保持するスプリング付勢式の内部残圧保持バルブ(7475)として、前記燃料ポンプの作動に伴いスプリング反力に抗して開弁するバルブエレメント(7475b)を有した内部残圧保持バルブであり、
前記連通口は、前記燃料通路のうち前記内部残圧保持バルブから前記外部残圧保持バルブ側へ位置ずれした位置ずれ箇所(R)に開口し、
前記吐出通路により前記内燃機関側へ向かって吐出させるための燃料を前記連通口から前記外部残圧保持バルブ側へ向かって流通させる外部用通路部(7470f)と、前記連通口から前記内部残圧保持バルブ側へ向かって流通させる燃料の流れを前記外部用通路部よりも絞る内部用通路部(7470g)とは、前記燃料通路に形成され、
前記内部用通路部の通路断面積を円筒管(P)の通路断面積として変換した場合に、当該円筒管の通路直径Dと、前記内部用通路部の長さLとは、L/D≧3の関係式を満たす請求項1~13のいずれか一項に記載の燃料供給装置。 - 前記吐出通路からの吐出により前記内燃機関側へ供給された燃料の圧力を逃がすスプリング付勢式のリリーフバルブ(7443)として、当該圧力逃がしのためにスプリング反力に抗して開弁するバルブエレメント(7443b)を有したリリーフバルブを、備え、
前記フィルタケースは、前記燃料通路のうち前記外部残圧保持バルブよりも下流側にて前記内燃機関側へ向かう流れとは分流された燃料を、前記リリーフバルブへ案内するリリーフ通路(476)を、有する請求項14に記載の燃料供給装置。 - 前記燃料通路(8470)は、前記フィルタケース(43)のうち前記燃料フィルタを収容する収容室(463)に対して前記燃料フィルタよりも下流側にて連通する連通口(7470e)を有し、前記連通口から燃料を流通させ、
前記開閉バルブの一つは、前記収容室における燃料の圧力を前記燃料ポンプ(8042)の停止に伴い保持するスプリング付勢式の内部残圧保持バルブ(8475)として、前記燃料ポンプの作動に伴いスプリング反力に抗して開弁するバルブエレメント(7475b)を有した内部残圧保持バルブであり、
前記連通口は、前記燃料通路のうち前記内部残圧保持バルブから前記吐出通路(8472)側へ位置ずれした位置ずれ箇所(R)に開口し、
前記連通口から前記吐出通路側へ向かって燃料を流通させる外部用通路部(7470f)と、前記連通口から前記内部残圧保持バルブ側へ向かって流通させる燃料の流れを前記外部用通路部よりも絞る内部用通路部(7470g)とは、前記燃料通路に形成され、
前記内部用通路部の通路断面積を円筒管(P)の通路断面積として変換した場合に、当該円筒管の通路直径Dと、前記内部用通路部の長さLとは、L/D≧3の関係式を満たす請求項1~13のいずれか一項に記載の燃料供給装置。 - 前記内部残圧保持バルブは、前記吐出通路へ向かう燃料の圧力を調整し、
前記内部残圧保持バルブとは別の前記開閉バルブの一つは、前記内部用通路部から前記内部残圧保持バルブを通して排出される燃料の圧力を逃がすスプリング付勢式のリリーフバルブ(8479)として、当該圧力逃がしのためにスプリング反力に抗して開弁するバルブエレメント(8479b)を有したリリーフバルブである請求項16に記載の燃料供給装置。 - 前記燃料タンク内において前記燃料ポンプ及び前記フィルタケースを収容するサブタンク(20)を、備え、
前記フィルタケースは、前記サブタンクの内周面(8020e)に向かって開口するリリーフ通路(8476)を、前記特定箇所に有し、
前記リリーフバルブは、前記リリーフ通路に設けられ、
前記サブタンクは、前記リリーフ通路の最下流端(8476a)と対向することにより、当該最下流端を通して前記リリーフバルブから排出される燃料の流れを横方向に逃がす整流部(8020f)を、有する請求項17に記載の燃料供給装置。 - 前記フィルタケースは、前記収容室及び前記連通口の間を中継する中継通路(7465)を、有する請求項14~18のいずれか一項に記載の燃料供給装置。
- 前記連通口は、前記位置ずれ箇所にて前記外部用通路部に開口し、
前記内部用通路部は、前記外部用通路部のうち前記中継通路から前記内部残圧保持バルブ(7475,8475)を挟んで離間した離間箇所(Q)に開口することにより、前記外部用通路部を介して前記連通口と連通する請求項19に記載の燃料供給装置。 - 前記中継通路における燃料の流通方向が前記内部用通路部における燃料の流通方向に対して傾斜することにより、前記中継通路からの燃料流れは、前記外部用通路部を通して折り返されて前記内部用通路部へ向かう請求項20に記載の燃料供給装置。
- 前記連通口は、前記位置ずれ箇所にて前記外部用通路部に開口することにより、前記外部用通路部を介して前記内部用通路部と連通する請求項14~21のいずれか一項に記載の燃料供給装置。
- 前記内部用通路部から前記内部残圧保持バルブ(7475,8475)を通して排出される燃料を絞って噴出させることにより、前記燃料タンク内の燃料を前記燃料ポンプ(7042,8042)の周囲へ移送するジェットポンプ(45)を、備える請求項14~22のいずれか一項に記載の燃料供給装置。
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- 2014-11-03 DE DE112014005053.9T patent/DE112014005053T5/de not_active Ceased
- 2014-11-03 US US15/031,084 patent/US20160265494A1/en not_active Abandoned
- 2014-11-03 KR KR1020167012906A patent/KR101869839B1/ko active IP Right Grant
- 2014-11-03 WO PCT/JP2014/005534 patent/WO2015068373A1/ja active Application Filing
- 2014-11-03 CN CN201480060583.5A patent/CN105705766B/zh active Active
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CN108779746A (zh) * | 2016-03-18 | 2018-11-09 | 株式会社电装 | 燃料供给装置及其制造方法 |
CN108779746B (zh) * | 2016-03-18 | 2020-04-07 | 株式会社电装 | 燃料供给装置及其制造方法 |
Also Published As
Publication number | Publication date |
---|---|
JP6318987B2 (ja) | 2018-05-09 |
CN105705766B (zh) | 2018-09-11 |
KR20160070146A (ko) | 2016-06-17 |
JP2015110939A (ja) | 2015-06-18 |
DE112014005053T5 (de) | 2016-08-25 |
US20160265494A1 (en) | 2016-09-15 |
KR101869839B1 (ko) | 2018-06-21 |
CN105705766A (zh) | 2016-06-22 |
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