WO2006006516A1 - 燃料供給装置 - Google Patents
燃料供給装置 Download PDFInfo
- Publication number
- WO2006006516A1 WO2006006516A1 PCT/JP2005/012651 JP2005012651W WO2006006516A1 WO 2006006516 A1 WO2006006516 A1 WO 2006006516A1 JP 2005012651 W JP2005012651 W JP 2005012651W WO 2006006516 A1 WO2006006516 A1 WO 2006006516A1
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- WO
- WIPO (PCT)
- Prior art keywords
- fuel
- auxiliary
- pump
- pump chamber
- chamber
- Prior art date
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Classifications
-
- 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
- F02M37/20—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 characterised by means for preventing vapour lock
-
- 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
- F02M37/043—Arrangements for driving reciprocating piston-type 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
- F02M37/04—Feeding by means of driven pumps
- F02M37/08—Feeding by means of driven pumps electrically driven
Definitions
- the present invention relates to a fuel supply apparatus including a main pump and an auxiliary pump.
- FIG. 6 shows a configuration diagram of a fuel supply apparatus including the solenoid pump disclosed in Patent Document 1.
- the fuel supply device includes a solenoid pump 70 and a fuel introduction passage 74 that connects the solenoid pump 70 and the fuel tank 72.
- a filter 76 is provided in the middle of the fuel introduction passage 74, and the fuel that has passed through the filter 76 is introduced into the solenoid pump 70.
- the solenoid pump 70 includes a housing 78, a cylindrical body 80 provided in the housing 78, a coil 82 wound around the cylindrical body 80, and a reciprocating slide in the cylindrical body 80.
- a plunger 86 that is formed in a passage 84 in the interior, a pump chamber 88 that is formed at one end of the plunger 86 and communicates with the passage 84, and fuel is introduced into the pump chamber 88.
- a discharge valve 92 for discharging fuel from the pump chamber 88 to the outside of the solenoid pump 70.
- ON / OFF of energization to the coil 82 of the solenoid pump 70 is controlled by an electronic control circuit 94 provided outside the solenoid pump 70.
- the plunger 86 reciprocates when the coil 82 is turned on and off, and the suction valve 90 and the discharge valve 92 are opened and closed by the pressure change in the pump chamber 88 due to the reciprocation of the plunger 86.
- the fuel is sucked and discharged.
- a pressure regulator 96 and an indicator 98 are provided close to the discharge valve 92 side of the solenoid pump 70, and fuel discharged from the solenoid pump 70 is injected from the indicator 98 toward the engine 99, for example.
- Patent Document 1 Japanese Patent Laid-Open No. 11-218076 (Page 4-5, FIG. 1)
- the heat generated in the coil 82 when the coil 82 is energized The fuel is heated by frictional heat generated by sliding of the plunger 86, and vapor is continuously generated in the fuel.
- vapor is also generated in the fuel in the fuel introduction passage 74 and the fuel force in the solenoid pump 70.
- the fuel containing the vapor is injected from the injector 98 to the engine 99, a desired fuel discharge amount cannot be obtained, so that a stable operation performance cannot be obtained.
- the fuel tank 72 is disposed above the solenoid pump 70 as a measure for removing the paper generated in the solenoid pump 70 therefrom.
- the fuel introduction passage 74 that connects the fuel tank 72 and the solenoid pump 70 is set so that there is no vertical bending (no peaks or valleys) along the way.
- the diameter of the fuel introduction passage 74 is set to a dimension (diameter of 8 mm or more) that allows the vapor to pass in the direction opposite to the fuel passing direction at the same time as the fuel passes in one direction.
- the vapor generated in the solenoid pump 70 is returned to the fuel tank 72 by natural rise through the fuel introduction passage 74, so that the fuel tank 72 is disposed above the solenoid pump 70. Therefore, there is a problem in that the degree of freedom in the vertical arrangement of the fuel tank 72 and the solenoid pump 70 is not sufficient (particularly, the fuel tank 72 cannot be arranged below the solenoid pump 70 or the like).
- the diameter of the fuel introduction passage 74 must be 8 mm or more, and an introduction pipe (not shown) provided with the fuel introduction passage 74 therein. ) Has a drawback of increasing the outer diameter. Furthermore, if a mountain or valley is formed in the vertical direction in the middle of the fuel introduction passage 74, vapor may accumulate in the middle and the desired fuel may not be supplied from the fuel tank 72 to the solenoid pump 70. In the middle, he was forced to create mountains and valleys in the vertical direction.
- the present invention has been made in view of the above points, and can capture the degree of freedom in the vertical direction of the fuel tank. It is an object of the present invention to provide a fuel supply device that can be obtained, has a diameter of the fuel introduction passage smaller than that of the conventional one, and allows the vertical bending of the fuel introduction passage. Means for solving the problem
- the fuel supply device includes a housing, a main pump having a pump chamber formed in the housing, first operating means for operating the main pump, and fuel from a fuel tank.
- a fuel supply device comprising a fuel introduction passage for introduction into a pump, wherein the fuel supply device has a fuel reservoir that communicates with the fuel introduction passage and communicates with the pump chamber, and an auxiliary pump chamber.
- An auxiliary pump provided downstream from the reservoir, second operating means for operating the auxiliary pump, an auxiliary fuel introduction passage communicating the auxiliary pump chamber and the fuel reservoir, and the auxiliary pump chamber
- An auxiliary fuel discharge passage that communicates with the fuel tank, and the position of communication with the auxiliary fuel introduction passage in the fuel reservoir is higher than the position of communication with the pump chamber. .
- the main pump includes an intake valve that allows intake of fuel into the pump chamber and a discharge valve that allows fuel discharge from the pump chamber.
- the auxiliary pump includes a suction valve that allows fuel to be sucked into the auxiliary pump chamber and a discharge valve that allows fuel discharge from the auxiliary pump chamber.
- the fuel supply device according to the present invention includes the fuel reservoir in the housing of the main pump.
- the fuel supply apparatus according to the present invention is such that the auxiliary pump is provided in the housing of the main pump.
- the fuel supply device according to the present invention is provided with at least one filter at both the position of communication with the auxiliary fuel discharge passage and the position of communication with the pump chamber in the fuel reservoir.
- the auxiliary fuel discharge passage communicates with a higher rank of the fuel tank.
- the first operating means includes a coil and a plunger that divides the pump chamber and reciprocates by the electromagnetic force of the coil to change the pressure in the pump chamber. It is made up of.
- the second operating means partitions the coil and the auxiliary pump chamber, and moves back and forth by the electromagnetic force of the coil to change the pressure in the auxiliary pump chamber. To consist of the plunger It is a thing.
- the first operating means defines the pump chamber, and is configured to be a diaphragm cover that changes the pressure in the pump chamber by the pulsation pressure of the internal combustion engine. is there.
- the second operating means includes the diaphragm that is moved by the pulsation pressure of the internal combustion engine, and a membrane that moves according to the movement of the diaphragm and changes the pressure of the auxiliary pump chamber. And power.
- fuel is introduced from the fuel tank into the fuel reservoir via the fuel introduction passage due to a pressure drop in the fuel reservoir.
- the position of the fuel tank is not restrained in the vertical direction with respect to the position of the main pump, and a degree of freedom in the height of the fuel tank can be obtained.
- This makes it possible to mount a fuel tank under the starter's feet, which was impossible before.
- the fuel and vapor moving in the fuel introduction passage from the fuel tank toward the fuel reservoir are moved in the same direction from the fuel tank toward the fuel reservoir (moving the vapor toward the fuel tank). Therefore, it is possible to reduce the diameter of the fuel introduction passage and to make a mountain or valley in the vertical direction in the middle of the fuel introduction passage.
- it is possible to use a general hose as the piping for the fuel introduction passage and the cost can be reduced by greatly improving the degree of freedom in handling the piping.
- FIG. 1 is a partial cross-sectional configuration diagram showing an embodiment of a fuel supply apparatus according to the present invention.
- FIG. 2 is a configuration diagram showing the state of movement of fuel and vapor when the solenoid is energized.
- FIG. 3 is a configuration diagram showing the state of movement of fuel and vapor when the solenoid is energized OFF.
- FIG. 4 is a pulse signal diagram of energization to the solenoid.
- FIG. 5 is a partial cross-sectional configuration diagram showing another embodiment of the fuel supply apparatus according to the present invention.
- FIG. 6 is a configuration diagram of a fuel supply device provided with a conventional solenoid pump.
- Fuel introduction passage Fuel reservoir Auxiliary pump Auxiliary fuel introduction passage Auxiliary fuel return passage Housing
- the present invention temporarily stores the fuel from the fuel tank in the fuel reservoir, and prevents the introduction of vapor into the main pump by introducing the fuel into the main pump from below the fuel reservoir.
- a vapor is introduced into the auxiliary pump together with fuel from above the fuel reservoir, and the vapor is returned to the fuel tank together with the fuel returned from the auxiliary pump to the fuel tank.
- FIG. 1 is a partial sectional view showing an embodiment of a fuel supply apparatus according to the present invention.
- the fuel supply device according to the present invention includes a solenoid pump 10 as a main pump for sucking and discharging fuel, a fuel introduction passage 14 for introducing fuel from the fuel tank 12 into the solenoid pump 10, and a fuel introduction passage. 14 and a fuel reservoir 16 provided between the solenoid pump 10, an auxiliary pump 18 that operates using back pressure of a plunger (described later) in the solenoid pump 10, the auxiliary pump 18, and the fuel reservoir
- An auxiliary fuel introduction passage 20 that communicates with the part 16 and an auxiliary fuel return passage 22 that communicates between the auxiliary pump 18 and the fuel tank 12 are provided.
- the fuel in the fuel tank 12 is introduced into the fuel reservoir 16 through the fuel introduction passage 14, and the fuel is temporarily stored in the fuel reservoir 16.
- the connecting position of the fuel introduction passage 14 to the fuel tank 12 is the lower part of the fuel tank 12 (below the oil level).
- the connection position of the fuel introduction passage 14 to the fuel reservoir 16 is not particularly limited, but it is desirable to be at the lower portion of the fuel reservoir 16.
- the solenoid pump 10 includes a housing 24, a cylindrical body 26 provided in the housing 24, a coil 28 provided outside the cylindrical body 26, and a pump formed in the housing 24.
- the chamber 30 and the pump chamber 30 are partitioned, and are provided in the vicinity of the solid and cylindrical plunger 32 that reciprocates in the cylindrical body 26 by the electromagnetic force of the coil 28, and the suction port 34 of the pump chamber 30.
- the suction valve 36 that allows fuel to be sucked into the pump chamber 30, the discharge valve 40 that is provided near the discharge port 38 of the pump chamber 30 and allows fuel discharge from the pump chamber 30, and the plunger 32 is connected to the pump chamber 30.
- the first return spring 42 that urges away from the back chamber, the back pressure chamber 44 formed on the opposite side of the pump chamber 30 around the plunger 32, and the plunger 32 in the back chamber 44 on the pump chamber 30 side.
- a second return spring 46 for biasing. ON / OFF of the energization to the coil 28 of the solenoid pump 10 is controlled by the electronic control circuit 48.
- the fuel discharged from the solenoid pump 10 reaches the injector 52 and the like through the pressure regulator 50, and is injected from the injector 52 toward the engine 54 and the like.
- the fuel reservoir 16 communicates with the suction port 34 of the pump chamber 30 of the solenoid pump 10, and the suction port 34 is opened and closed by a suction valve 36.
- the suction valve 36 provided in the suction port 34 of the pump chamber 30 of the solenoid pump 10 is provided with a suction port 34 when the fuel pressure in the pump chamber 30 becomes lower than a predetermined value compared with the fuel pressure in the fuel reservoir 16. Then, the fuel reservoir 16 also introduces fuel into the pump chamber 30.
- the discharge valve 40 provided in the discharge port 38 of the pump chamber 30 opens the discharge port 38 when the fuel pressure in the pump chamber 30 becomes higher than a predetermined pressure, and the pressure regulator 50 is opened from the pump chamber 30.
- the fuel is discharged toward
- the first actuating means operates the suction valve 36 and the discharge valve 40 by changing the pressure in the pump chamber 30, and comprises a coil 28 and a plunger 32 that reciprocates by the electromagnetic force of the coil 28. .
- a filter 56 is provided inside the fuel reservoir 16, at a position communicating with the suction port 34 of the pump chamber 30.
- the filter 56 may be provided in the fuel introduction passage 14 or in the fuel tank 12 that does not pass in the fuel reservoir 16.
- the fuel reservoir 16 is preferably formed inside the housing 24 of the solenoid pump 10 as shown in FIG. As a result, the solenoid pump 10 and the fuel reservoir 16 are integrated, and the fuel supply device of the present invention can be made compact.
- the fuel reservoir 16 may be configured separately from the solenoid pump 10.
- the auxiliary pump 18 is connected to the back pressure chamber 44 of the solenoid pump 10 and is connected to the auxiliary pump chamber 58. And an auxiliary suction valve 62 provided near the suction port 60 of the auxiliary pump chamber 58 and allowing fuel intake into the auxiliary pump chamber 58, and an auxiliary pump chamber provided near the discharge port 64 of the auxiliary pump chamber 58. And an auxiliary discharge valve 66 that allows fuel discharge from 58.
- the back pressure chamber 44 which is not a separate space from the back pressure chamber 44 and the auxiliary pump chamber 58, may be regarded as the auxiliary pump chamber 58.
- the auxiliary pump 18 is preferably provided inside the housing 24 of the solenoid pump 10 as shown in FIG.
- the solenoid pump 10 and the auxiliary pump 18 are integrated, and the fuel supply device of the present invention can be formed compactly.
- the auxiliary pump 18 may be configured separately from the solenoid pump 10.
- the second actuating means operates the auxiliary suction valve 62 and the auxiliary discharge valve 66 by changing the pressure in the auxiliary pump chamber 58, and includes a coil 28 and a plunger 32 that reciprocally moves by the electromagnetic force of the coil 28. Power.
- the suction port 60 of the auxiliary pump chamber 58 communicates with the fuel reservoir 16 through the auxiliary fuel introduction passage 20.
- This auxiliary fuel introduction passage 20 is shown in FIG. 1 as being provided outside the housing 24 of the solenoid pump 10! /, But is provided inside the housing 24 of the solenoid pump 10. May be.
- the discharge port 64 of the auxiliary pump chamber 58 communicates with the upper part (above the oil level) of the fuel tank 12 through the auxiliary fuel return passage 22.
- the communication position to the auxiliary fuel introduction passage 20 is the upper position, and the communication position with the suction port 34 of the pump chamber 30 of the solenoid pump 10 is the lower position.
- the filter 56 provided in the communication position with the suction port 34 of the pump chamber 30 inside the fuel reservoir 16 is set to a size such that it is also disposed at the communication position with the auxiliary fuel introduction passage 20. Is desirable.
- the filter 56 can be installed efficiently and the parts can be covered by covering the position where the filter 56 is in communication with the inlet 34 of the pump chamber 30 and the position of communication with the auxiliary fuel introduction passage 20. Management efficiency can be improved.
- the filter provided at the communication position between the fuel reservoir 16 and the auxiliary fuel introduction passage 20 and the filter provided at the communication position between the fuel reservoir 16 and the suction port 34 to the pump chamber 30 are separated. It doesn't matter.
- the auxiliary suction valve 62 provided in the suction port 60 of the auxiliary pump chamber 58 has a predetermined value compared to the fuel pressure in the fuel reservoir 16 (in the auxiliary fuel introduction passage 20) in the auxiliary pump chamber 58. Less than When lowered, the intake port 60 is opened, and fuel and vapor are introduced into the auxiliary pump chamber 58 from the fuel reservoir 16 (auxiliary fuel introduction passage 20).
- the auxiliary discharge valve 66 provided in the discharge port 64 of the auxiliary pump chamber 58 opens the discharge port 64 and allows the auxiliary fuel return passage from the auxiliary pump chamber 58 when the fuel pressure in the auxiliary pump chamber 58 becomes higher than a predetermined value. The fuel and the vapor are returned to the fuel tank 12 via the route 22.
- Fig. 2 shows the flow of fuel and vapor when the coil 28 is energized.
- Figure 3 shows the flow of fuel and vapor when the coil 28 is energized.
- the plunger 32 moves away from the pump chamber 30 side force against the urging force of the second return spring 46 by the electromagnetic force generated in the coil 28 (back pressure chamber 44). Move toward the side).
- the movement of the plunger 32 increases the volume of the pump chamber 30 and the pressure in the pump chamber 30 is lowered.
- the intake valve 36 is opened and fuel is introduced into the pump chamber 30 from the fuel reservoir 16.
- the pressure in the fuel reservoir 16 decreases, and fuel is introduced from the fuel tank 12 via the fuel introduction passage 14 into the fuel reservoir 16.
- the volume of the back pressure chamber 44 is reduced by the movement of the plunger 32 and the pressure in the back pressure chamber 44 is increased, and the high pressure in the back pressure chamber 44 is transmitted to the auxiliary pump chamber 58.
- the auxiliary discharge valve 66 provided at the discharge port 64 of the auxiliary pump chamber 58 is opened, and the fuel (including vapor) in the auxiliary pump chamber 58 is transferred to the fuel tank 12 via the auxiliary fuel return passage 22. Returned.
- the fuel supply apparatus is exposed to a high atmospheric temperature, and vapor is generated in the fuel existing in the path along which the fuel moves in the fuel supply apparatus.
- vapor is generated in the fuel in the fuel introduction passage 14 or the fuel in the fuel reservoir 16
- the vapor moves upward in the fuel reservoir 16 and accumulates. Since the fuel reservoir 16 is located below the fuel reservoir 16 at the position where the fuel reservoir 16 communicates with the suction port 34 of the pump chamber 30, the fuel introduced into the pump chamber 30 of the solenoid pump 10 from the fuel reservoir 16 is vaporized. Is not included.
- the fuel containing the vapor passes from the auxiliary pump chamber 58 through the auxiliary fuel return passage 22 to the fuel tank 12. Returned to Further, even when vapor is generated in the fuel in the auxiliary fuel introduction passage 20 provided between the fuel reservoir 16 and the auxiliary pump chamber 58, the vapor remains in the auxiliary fuel introduction passage 20. Either move to part 16.
- the fuel supply device according to the present invention is exposed to a high atmospheric temperature in the energized ON state shown in FIG. 2, the fuel introduced into the pump chamber 30 does not include vapor, and the auxiliary pump The fuel and vapor existing in the chamber 58 are returned to the fuel tank 12 via the auxiliary fuel return passage 22.
- the fuel introduced into the pump chamber 30 does not include a vapor as described above, and the fuel pressure in the passage from the pump chamber 30 to the injector 52 is high (for example, 300 kPa). Therefore, it can be considered that the fuel in the passage to the generator 52 does not include a vapor, and an appropriate amount of fuel can be injected.
- the volume of the back pressure chamber 44 increases due to the movement of the plunger 32, and both the pressure in the back pressure chamber 44 and the pressure in the auxiliary pump chamber 58 become low.
- the auxiliary intake valve 62 of the auxiliary pump chamber 58 is opened, and the fuel and vapor existing in the auxiliary pump introduction passage 20 are introduced into the auxiliary pump chamber 58.
- the fuel and vapor existing above the fuel reservoir 16 are introduced into the auxiliary fuel introduction passage 20.
- the fuel to be injected from the solenoid pump 10 is temporarily accumulated from the fuel tank 12 through the fuel introduction passage 14 into the fuel reservoir 16.
- the vapor generated in the position of the fuel reservoir 16 and the fuel introduction passage 14 on the upstream side is naturally placed at the upper position of the fuel reservoir 16 (near the position where the auxiliary fuel introduction passage 20 is connected). Collect by rising. Since the vapor moves upward due to natural rise, the fuel reservoir
- the fuel located below does not include the vapor. Since fuel that does not include vapor located below the fuel reservoir 16 is introduced into the pump chamber 30 of the solenoid pump 10, the fuel discharged from the solenoid pump 10 to the indicator 52 does not include vapor. I can't.
- the vapor collected in the upper part of the fuel reservoir 16 is guided to the auxiliary pump chamber 58 from the auxiliary fuel introduction passage 20 by the function of the auxiliary pump 18, and then passes through the auxiliary fuel return passage 22. Returned to the fuel tank 12. Force that vapor may be generated in the fuel in the auxiliary fuel introduction passage 20 and the fuel in the auxiliary pump chamber 58 when the engine ambient temperature is high. This vapor also passes through the auxiliary fuel return passage 22 from the auxiliary pump chamber 58. Is returned to the fuel tank 12.
- the fuel reservoir 16 separates the fuel that does not include vapor and the vapor, and the vapor that accumulates above the fuel reservoir 16 is different from the pump chamber 30 of the solenoid pump 10 ( It returns to the fuel tank 12 via the auxiliary fuel introduction passage 20, the auxiliary pump chamber 58, and the auxiliary fuel return passage 22).
- the fuel that does not include vapor separated in the fuel reservoir 16 is introduced into the pump chamber 30 of the solenoid pump 10 so that the fuel discharged from the solenoid pump 10 does not include vapor, and a predetermined amount of fuel is supplied. Be able to spray.
- the fuel passing from the fuel tank 12 via the fuel introduction passage 14 is temporarily stored in the fuel reservoir 16.
- Fuel fuel containing vapor
- the fuel is sucked from the fuel introduction passage 14 due to the pressure drop in the fuel reservoir 16, so that the fuel tank 12 can be provided below the solenoid pump 10. That is, the fuel tank 12 can be mounted at any height.
- the fuel tank 12 can be mounted under the starter that could not be mounted in the past.
- the fuel introduction passage 14 of the present invention has a fuel (including vapor) only in one direction from the fuel tank 12 side toward the fuel reservoir 16 (solenoid pump 10) side. Move the fuel).
- the fuel and the vapor are moved in the same direction, so that the diameter of the fuel introduction passage 14 can be made significantly smaller than the conventional one.
- the fuel since the fuel is sucked from the fuel introduction passage 14 due to the pressure drop in the fuel reservoir 16, the fuel can be introduced into the fuel reservoir 16 even if a mountain or valley is formed in the fuel introduction passage 14. it can.
- the diameter of the fuel introduction passage 14 can be made smaller than that of the conventional one, and a mountain or valley can be formed in the middle of the fuel introduction passage 14. The degree of freedom of position can be greatly improved.
- the fuel is sucked into the fuel reservoir 16 twice for each reciprocation of the plunger 32. That is, the fuel is sucked into the fuel reservoir 16 both when the energization of the coil 28 in FIG. 2 is ON and when the energization of the coil 28 in FIG. 3 is OFF. This is because when the fuel discharged from the solenoid pump 10 is sucked into the fuel reservoir 16 and the remaining fuel is sucked into the auxiliary pump 18, the vapor is also forcibly assisted with the fuel. It is sucked into the pump 18 and then the vapor and surplus fuel are returned to the fuel tank 12.
- Vapor is easily generated in the back pressure chamber 44 at a high temperature.
- the auxiliary pump 18 is pumped with a force that changes the volume of the vapor. May not function as
- the stroke amount of the plunger 32 may be increased. That is, it is effective to lengthen the drive cycle of the solenoid pump 10, so the pump shown in Fig. 4 is used. For example, it is desirable to set the drive cycle of the loop to 40 ms or more.
- a diaphragm pump 100 for sucking and discharging fuel includes a first housing 106 mainly including an inflow communication passage 102 and a discharge communication passage 104, an intake valve 108 for opening and closing the inflow communication passage 102, and a discharge communication passage.
- a discharge valve 110 for opening and closing 104 a second housing 112 attached to one side of the first housing 106, a cover 114 attached to the other side of the first housing 106, a first housing 106 and a second housing A diaphragm 116 sandwiched between 112 and a membrane 118 sandwiched between the first housing 106 and the cover 114.
- a pump chamber 120 is formed between the diaphragm 116 and the first housing 106, and a pulse chamber 122 is formed between the diaphragm 116 and the second housing 112.
- the second housing 112 has a pulse introduction passage 124 communicating with the pulse chamber 122, and the pulse pressure generated by the engine 54 is introduced into the pulse chamber 122 via the pulse introduction passage 124.
- a fuel suction chamber 126 as a suction port and a fuel discharge chamber 128 as a discharge port are formed.
- the fuel suction chamber 126 communicates with the fuel reservoir 16, and fuel is introduced into the fuel suction chamber 126 from the fuel reservoir 16.
- the height of the connection position of the fuel reservoir 16 to the fuel suction chamber 126 is set to be lower than the height of the connection position of the fuel reservoir 16 to the auxiliary fuel introduction passage 20.
- the fuel suction chamber 126 communicates with the pump chamber 120 via the inflow communication passage 102 provided with the suction valve 108, and is set so that the fuel can move only from the fuel suction chamber 126 to the pump chamber 120 by the suction valve 108.
- the fuel discharge chamber 128 communicates with the pump chamber 120 via a discharge communication passage 104 provided with a discharge valve 110, and is set so that the fuel can move only from the pump chamber 120 to the fuel discharge chamber 128 by the discharge valve 110.
- the fuel discharge chamber 128 is connected via a pressure regulator 50. Thus, the fuel is discharged from the fuel discharge chamber 128 toward the injector 52.
- a damper chamber 130 facing the fuel suction chamber 126 with the membrane 118 interposed therebetween, and a back pressure chamber 132 facing the fuel discharge chamber 128 with the membrane 118 interposed therebetween are formed. Is done.
- the back pressure chamber 132 communicates with the auxiliary pump chamber 58 of the auxiliary pump 18, and the back pressure chamber 132 can be regarded as the same as the auxiliary pump chamber 58.
- the pulse pressure generated in the crank chamber (not shown) of the engine is introduced into the pulse chamber 122. Due to the pulse pressure introduced into the pulse chamber 122, the diaphragm 116 alternately moves between the pump chamber 120 side and the pulse chamber 122 side. Due to the movement of the diaphragm 116 toward the pulse chamber 122, fuel is sucked into the pump chamber 120 from the fuel suction chamber 126, and accordingly, fuel is sucked into the fuel suction chamber 126 from the fuel reservoir 16. Next, as the diaphragm 116 moves toward the pump chamber 120, fuel is discharged from the pump chamber 120 to the fuel discharge chamber 128, and fuel is discharged from the fuel discharge chamber 128 toward the injector 52.
- the first actuating means operates the suction valve 108 and the discharge valve 110 by changing the pressure in the pump chamber 120 by the pulsation pressure of the internal combustion engine, and includes a diaphragm 116 that partitions the pump chamber 120.
- the low pressure opens the auxiliary intake valve 62 and introduces fuel from the fuel reservoir 16 to the auxiliary pump 18 through the fuel introduction passage 20.
- the second actuating means operates the auxiliary suction valve 62 and the auxiliary discharge valve 66 by changing the pressure in the auxiliary pump chamber 58.
- the diaphragm 116 that is movable by the pulsation pressure of the internal combustion engine, and its diaphragm 116 Membrane 118 moves with the movement of the force
- Fuel suction and discharge in the pump chamber 120 of the diaphragm pump 100 of the second embodiment are the same operations as the intake and discharge of fuel in the pump chamber 30 of the solenoid pump 10 of the first embodiment.
- the influence of the fuel pressure change from the diaphragm pump 100 of the second embodiment to the auxiliary pump chamber 58 is the same as the influence of the fuel pressure change from the solenoid pump 10 of the first embodiment to the auxiliary pump chamber 58. is there. Therefore, the fuel supply device of the second embodiment has the same effect as the fuel supply device of the first embodiment.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
- Details Of Reciprocating Pumps (AREA)
- Supplying Secondary Fuel Or The Like To Fuel, Air Or Fuel-Air Mixtures (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP05765589A EP1783354A1 (en) | 2004-07-14 | 2005-07-08 | Fuel feed device |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004207265A JP2006029163A (ja) | 2004-07-14 | 2004-07-14 | 燃料供給装置 |
JP2004-207265 | 2004-07-14 |
Publications (1)
Publication Number | Publication Date |
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WO2006006516A1 true WO2006006516A1 (ja) | 2006-01-19 |
Family
ID=35783859
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2005/012651 WO2006006516A1 (ja) | 2004-07-14 | 2005-07-08 | 燃料供給装置 |
Country Status (4)
Country | Link |
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EP (1) | EP1783354A1 (ja) |
JP (1) | JP2006029163A (ja) |
CN (1) | CN1985086A (ja) |
WO (1) | WO2006006516A1 (ja) |
Families Citing this family (2)
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JP4864827B2 (ja) * | 2007-07-18 | 2012-02-01 | 愛三工業株式会社 | 燃料供給装置 |
DE102014208566A1 (de) * | 2014-05-07 | 2015-11-12 | Robert Bosch Gmbh | Einspritzsystem |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60107360U (ja) * | 1983-12-23 | 1985-07-22 | 東北三國工業株式会社 | 自動車用燃料ポンプの燃料蒸気セパレ−タ |
JPS6226367A (ja) * | 1985-07-29 | 1987-02-04 | Sanshin Ind Co Ltd | 船外機用エンジンの燃料供給装置 |
JPH02145657U (ja) * | 1989-05-16 | 1990-12-11 | ||
JPH0517157U (ja) * | 1991-08-09 | 1993-03-05 | 株式会社クボタ | デイーゼルエンジンの圧送式燃料供給装置 |
JP2002195122A (ja) * | 2000-12-27 | 2002-07-10 | Mikuni Corp | 燃料供給装置 |
-
2004
- 2004-07-14 JP JP2004207265A patent/JP2006029163A/ja active Pending
-
2005
- 2005-07-08 CN CNA2005800234249A patent/CN1985086A/zh active Pending
- 2005-07-08 WO PCT/JP2005/012651 patent/WO2006006516A1/ja active Application Filing
- 2005-07-08 EP EP05765589A patent/EP1783354A1/en not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60107360U (ja) * | 1983-12-23 | 1985-07-22 | 東北三國工業株式会社 | 自動車用燃料ポンプの燃料蒸気セパレ−タ |
JPS6226367A (ja) * | 1985-07-29 | 1987-02-04 | Sanshin Ind Co Ltd | 船外機用エンジンの燃料供給装置 |
JPH02145657U (ja) * | 1989-05-16 | 1990-12-11 | ||
JPH0517157U (ja) * | 1991-08-09 | 1993-03-05 | 株式会社クボタ | デイーゼルエンジンの圧送式燃料供給装置 |
JP2002195122A (ja) * | 2000-12-27 | 2002-07-10 | Mikuni Corp | 燃料供給装置 |
Also Published As
Publication number | Publication date |
---|---|
EP1783354A1 (en) | 2007-05-09 |
JP2006029163A (ja) | 2006-02-02 |
CN1985086A (zh) | 2007-06-20 |
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