Summary of the invention
But, in patent documentation 4 described fuel supply devices, because additional reservoir becomes the foot of fuel tank, so the moisture that exists fuel accumulates in the problem at this place easily.In the time of in moisture accumulates in additional reservoir, become the part of foot at additional reservoir, moisture is difficult to be discharged to outside the additional reservoir, exists petrolift and sucks moisture in the additional reservoir, it is supplied to the danger of motor.
The purpose of this invention is to provide a kind of fuel supply device that can remove the moisture in the additional reservoir.
Fuel supply device of the present invention is a kind of fuel supply device that is installed in the bottom of fuel tank, it is characterized in that, it comprises: the container portions of storing fuel, can attract the pump portion of the fuel in the aforementioned container portions, the moisture that is configured in the aforementioned container portions, the moisture in the aforementioned container portions is discharged to outside the aforementioned container portions is removed mechanism.
In fuel supply device of the present invention, remove mechanism by the moisture that is configured in the container portions, the moisture that is trapped in the container portions is discharged to outside the container portions.In container portions, moisture is detained easily, is difficult to discharge, and still, removes mechanism owing to be provided with moisture in container portions, so, can reliably the moisture that is detained be discharged, prevent of the attraction of pump portion to moisture.
In aforementioned fuel supply device, remove mechanism as aforementioned moisture, also can utilize the bubble supply device of supply bubble in aforementioned container portions.In this case, as aforementioned bubble supply mechanism, can utilize at aforementioned container portions inner opening, will be discharged to the degasification path outside the aforementioned pump at the bubble that aforementioned pump portion takes place.By the flow of bubble of discharging from aforementioned degasification path, can be to the ejection of the bottom surface of aforementioned container portions.In addition, also the filter cleaner that fuel filter is used can be set in aforementioned container portions, the opening of aforementioned degasification path is configured in not on the position with the direct subtend of aforementioned filter cleaner.And then, in aforementioned fuel supply device, remove mechanism as aforementioned moisture, also can utilize the jet pump that the fuel in the aforementioned fuel tank is sprayed in aforementioned container portions.In this case, aforementioned jet pump can be connected to the bubble that will take place in aforementioned pump portion is discharged on the degasification path outside the aforementioned pump.
In aforementioned fuel supply device, can on the bottom surface of aforementioned container portions, curved face part be set, the peripheral part of this curved face part is positioned at the top of central part side.In addition, below the opening of aforementioned degasification path, the guide member with curved face part can be set, described curved face part makes the underside side from the flow of bubble of aforementioned degasification path ejection from container portions rise to upper side.In this case, on aforementioned guide member curved face part is set, the cross section of described curved face part forms circular-arc, and its peripheral part is positioned at the top of central part side, aforementioned guide member is configured on the bottom surface of aforementioned container portions.And then, also the cross section of aforementioned guide member can be formed the U font, be configured in aforementioned degasification path opening under.On the other hand, also aforementioned container portions can be arranged on the below of the bottom surface of aforementioned fuel tank.
According to fuel supply device of the present invention, because configuration is removed mechanism with the moisture that the moisture in the container portions is discharged to outside the container portions in the container portions of storing fuel, so, the moisture that is trapped in the container portions easily and be difficult to discharge can be discharged to outside the container portions, can prevent that pump portion from attracting the moisture in the container portions.
In addition, remove mechanism,, need not additional special device, use fuel pump structure, just can remove the moisture of container portions in the past by utilizing at the container portions inner opening, will being discharged to the degasification path outside the pump at the bubble that pump portion takes place as moisture.
Description of drawings
Fig. 1 is the sectional view of expression as the structure of the fuel supply device of embodiments of the invention 1.
Fig. 2 (a) is the explanatory drawing of state that expression comes from the flow of bubble of degasification path, (b) is the explanatory drawing that the position is set of expression degasification path.
Fig. 3 is the sectional view of expression as the structure of the fuel supply device of embodiments of the invention 2.
Fig. 4 is the explanatory drawing of expression as the variation of the fuel supply device of embodiments of the invention 2.
Fig. 5 is the explanatory drawing of expression as the another one variation of the fuel supply device of embodiments of the invention 2, (a) represents the structure of guide plate and the state of flow of bubble, (b) represents the position that is provided with of degasification path and guide plate.
Fig. 6 is the explanatory drawing of expression as the structure of the fuel supply device of embodiments of the invention 3.
Symbol description
1 fuel supply device, 2 fuel tanks, the 2a bottom surface, 2b pump mounting hole, 3 fuel distribution tubes, 4 shells, the 4a housing section, the 4b lip part, the 4c end difference, 5 covers, 6 discharge tubes, 7 power connectors, 8 power supply terminals, 9 wire harness, 10 motor, 11 housings, 12 end caps, 13 end caps, 14 fuel ejection portions, 15 fuel suction portions, 20 petrolifts, 21 filter cleaners, 23 fuel flow paths, 27 permanent magnets, 28 armatures, 29 slits, 31 magnetic cores, 32 coils, 33 running shafts, 33a D cutting part, 34 bearing portions, 35 pump case, 36 bearings, 37 commutators, 38 brushes, 39 brush carriers, 43 terminal boards, 50 pressure regulators, 51 regulator assembly departments, 52 barrier films, 53 armatures, 54 valve bodies, 55 spring seats, 56 end differences, 57 covers, 58 springs, 59 balls, 61 tapered portion, 62 oil circuits, 63 valve springs, 64 seat portion, 65 fuel inflow entrances, 66 fuel outflow openings, 67 openings, 71 impellers, 72 impeller accommodating parts, 73 pump chambers, 74 fuel ejiction openings, 75 fuel suction port, 76 intercommunicating pores, 81 filter cleaner carriages, 82 container portions, 83 fuel inflow entrances, 84 degasification paths (moisture is removed mechanism, the bubble supply mechanism), 85 openings, 86 flow of bubbles, 87 bottom surfaces, the 87a peripheral part, the 87b central part, 91 fuel supply devices, 92 curved face part, 93 guide plates, 94 guide plates, 101 fuel supply devices, 102 jet pumps (moisture is removed mechanism), 103 nozzles, 104 suction casings, 105 pump main bodys, 106 end gaps, 107 introducing ports, Room 108,109 suction ports, 111 trunnion portions, 112 streams, 113 ejiction openings, 114 jets
Embodiment
Describe embodiments of the invention below with reference to the accompanying drawings in detail.
Embodiment 1
Fig. 1 is the sectional view of expression as the structure of the fuel supply device of embodiments of the invention 1.The fuel supply device 1 of Fig. 1 is the automobile-used device of two-wheel, is installed on the bottom of fuel tank 2 with the form of inserting from the below of case.Fuel supply device 1 is connected on the fuel system of not shown motor, via fuel distribution tube the Fuelinjection nozzle of motor is carried out supply of fuel.
Fuel supply device 1 is integrated with motor 10 and petrolift (pump portion) 20 and pressure regulator 50, is contained in the plastic shell 4.Shell 4 comprises housing section 4a cylindraceous and lip part 4b, and motor 10, petrolift 20 and pressure regulator 50 are accommodated in the housing section 4a.Upper end side at housing section 4a is equipped with plastic cover 5, and in this state, the pump mounting hole 2b from the bottom surface 2a that is formed on fuel tank 2 is inserted into the inside of case.At this moment, utilize not shown bolt, nut, lip part 4b is fixed to the bottom of fuel tank 2.
Underpart at shell 4 forms discharge tube 6 and power connector 7.Fuel distribution tube 3 is connected on the discharge tube 6.In addition, not shown power supply wiring is connected on the power connector 7.Accommodate power supply terminal 8 in power connector 7, wire harness 9 is connected on the power supply terminal 8.Wire harness 9 extends above the side direction of shell 4, is electrically connected with motor 10 in the upper end portion of shell.
Motor 10, petrolift 20 and pressure regulator 50 are contained in the housing 11 of steel integrally. End cap 12,13 is by the two ends of riveted fixing at housing 11 cylindraceous.End cap 12 is formed by synthetic resin, is installed to the distolateral of shell 11.End cap 12 is provided with the brush carrier 39 of the brush 38 that is used to keep motor 10, the lid of double as housing 11 and brush carrier.In addition, on end cap 12, the regulator assembly department 51 that holds pressure regulator 50 is set.
End cap 13 is formed by cast aluminium, and another that is installed in housing 11 is distolateral.Lower end side at end cap 13 is provided with fuel ejection portion 14 and fuel suction portion 15.Not shown one-way valve (safety check) is connected in the fuel ejection portion 14, prevent fuel from fuel distribution tube 3 side refluxs to petrolift 20 sides.The outside in fuel suction portion 15 is equipped with filter cleaner carriage 81.81 fastenings of filter cleaner carriage are thereunder installed the filter cleaner 21 that fuel filter is used to the end difference 4c of shell 4.
The bottom of shell 4 (in Fig. 1, the lower side of end difference 4c) becomes container portions 82, and filter cleaner 21 is contained in this container portions 82.Container portions 82 is arranged on the below of the bottom surface 2a of fuel tank 2, and the fuel in the fuel tank 2 accumulates in this place, is attracted by petrolift 20.Fuel inflow hole 83 (with reference to Fig. 2) is set in the side of shell 4, and fuel flow in the container portions 82 via this fuel inflow hole 83.
Motor 10 is direct current motors of charged brush.The yoke of housing 11 double as motor 10, side face is fixed with a plurality of permanent magnets 27 within it.In the inboard of permanent magnet 27, can dispose armature 28 with rotating freely.Armature 28 comprises: have the magnetic core 31 of a plurality of slits 29 that extend along axial direction and be wound up into coil 32 on the slit 29.Armature 28 is fixed on the running shaft 33, but free rotary ground supporting is between being located at the bearing portion 34 on the end cap 12 and being installed in bearing 36 on the pump case 35.
Upside in Fig. 1 of armature 28 is provided with commutator 37.Commutator 37 is fixed on the running shaft 33.Brush 38 contacts with commutator 37 from radial direction.Brush 38 is contained in the brush carrier 39 that is formed on the end cap 12, is crimped onto on the commutator 37 with the spring (not shown).Brush 38 is connected with wire harness 9 via terminal board 43, whereby, power supply terminal 8 and brush 38 is electrically connected.
Pressure regulator 50 is installed on the regulator assembly department 51 of end cap 12.Pressure regulator 50 is configured in the gap part between the brush 38 that becomes former blind area, pressure regulator 50 and brush 38, as shown in Figure 1, with along axial direction state configuration arranged side by side.Therefore, by the setting of pressure regulator, the size of the length direction of device can be not elongated, in addition, because pressure regulator 50 is accommodated in the end cap 12, so, also suppressed the size of radial direction, try hard to the miniaturization of device.
Pressure regulator 50 comprises the armature 53 by barrier film 52 supportings.Armature 53 is made of valve body 54 and spring seat 55, and the interior perimembranous of barrier film 52 is clamped between valve body 54 and the spring seat 55.The peripheral part of barrier film 52 is clamped in the end difference 56 that is formed on the regulator assembly department 51 and is contained between the cover 57 in the regulator assembly department 51, and armature 53 can be supported up or down by barrier film 52.In spring seat 55 and cover 57 upper end between the perimembranous, the spring 58 that configuration loads armature 53 down direction in figure.In addition, will cover 57 be pressed in the regulator assembly department 51 after, with the top riveted fixing, limit its moving in axial direction.
Configuration ball 59 in valve body 54.Ball 59 can freely contact, break away from ground and be provided with the tapered portion 61 on being formed on valve body 54.In valve body 54, form oil circuit 62,, cut off, open oil circuit 62 by the contacting of ball 59 and tapered portion 61, disengaging.Utilization is configured in the valve spring 63 in the oil circuit 62, and ball 59 below in figure is loaded.In the bottom surface of regulator assembly department 51, with armature 53 subtends give prominence to seat portion 64 be set.Armature 53 is crimped onto on the upper surface of seat portion 64 by the pushing force of spring 58.At this moment, ball 59 also contacts with seat portion 64, and the pushing force of ball 59 resistance valve springs 63 rises, and contacts with tapered portion 61.Whereby, cut off oil circuit 62, become the state of cut-off valve.
In the bottom of regulator assembly department 51 fuel inflow entrance 65 is set.In addition, on the lid 57 that is installed in above the end cap 12, fuel outflow opening 66 is set, this fuel outflow opening 66 is communicated with the opening 67 of cover 5.In this pressure regulator 50, when the fuel pressure in the housing 11 surpassed the adjustment pressure of regulation, armature 53 was subjected to fuel pressure and is moved upward.Like this, ball 59 breaks away from tapered portion 61 by the pushing force of valve spring 63, and oil circuit 62 is opened, and becomes the state of opening valve.Whereby, fuel inflow entrance 65 and fuel outflow opening 66 are communicated with via oil circuit 62, and remaining fuel turns back in the fuel tank 2.
Petrolift 20 is regenerative pumps of non-volume type, is formed by pump case 35 and impeller 71.Lower end side in pump case 35 is embedded with impeller cylindraceous accommodating part 72.The impeller 71 that configuration is connected with the running shaft 33 of motor 10 in impeller accommodating part 72.On running shaft 33, form D cutting part 33a, impeller 71 is installed on this D cutting part 33a, rotates integrally with running shaft 33.Near the periphery of impeller 71,, a plurality of pump chambers 73 that form that in axial direction connect are set along circumferential direction.
Corresponding with pump chamber 73, fuel ejection portion 14 and the fuel suction portion 15 at end cap 13 is provided with fuel ejiction opening 74, fuel suction port 75 respectively.As previously described, at the backend configuration one-way valve of fuel ejiction opening 74, in addition, at the leading portion configuration filter cleaner 21 of fuel suction port 75.On the other hand, the upper end side in impeller accommodating part 72, corresponding with pump chamber 73, the intercommunicating pore 76 towards housing 11 inner openings is set.Utilize this intercommunicating pore 76, the fuel pressure that makes rotation by impeller 71 pass out to the fuel of fuel ejiction opening 74 equates with pressure in the housing 11, can utilize pressure regulator 50 to carry out the adjustment of fuel pressure.
On petrolift 20, also be provided with the degasification path (moisture is removed mechanism, the bubble supply mechanism) 84 that will be discharged to by the bubble of petrolift 20 generations outside the pump.In petrolift 20, exist when impeller 71 rotations, in pump chamber 73, produce the situation of bubble, when this bubble is intactly placed, carry out the pumping action that former state ground is comprising bubble, pumping efficiency reduces.Therefore, in petrolift 20, to connect the form of end cap 13, the inside and outside degasification path 84 of connection pump is set, the bubble that produces during with suction is discharged to outside the pump.Degasification path 84 one distolateral another is distolateral at the position opening corresponding to pump chamber 73, at container portions 82 inner openings.
As previously described, because container portions 82 is arranged on the below of the bottom surface 2a of fuel tank 2, so, the invalid residual quantity of fuel is suppressed at bottom line, can stably carries out the supply of fuel, but then, moisture is trapped in the container portions 82 easily, is difficult to discharge.Relative therewith, in described fuel supply device 1, because degasification path 84 is at container portions 82 inner openings, so, being accompanied by the action of petrolift 20, the flow of bubble that will contain fuel is fed in the container portions 82, the fuel in the stirred vessel portion 82.Therefore, the moisture that is trapped in the container portions 82 also is stirred, outside flow of bubble is discharged to container portions.
Fig. 2 (a) is the explanatory drawing of state that expression comes from the flow of bubble of degasification path 84, and Fig. 2 (b) is the explanatory drawing that the position is set of expression degasification path 84.Shown in Fig. 2 (b), degasification path 84 is arranged on the position that does not dispose filter cleaner 21, the opening 85 of degasification path 84 not with filter cleaner 21 direct subtends.Shown in Fig. 2 (a), the opening 85 of degasification path 84 is discharged flow of bubble 86, to 87 ejections of the bottom surface of container portions 82.When flow of bubble 86 contacts with container portions bottom surface 87,87 diffusions along the bottom surface.Whereby, the fuel in the container portions 82 is stirred, and accumulates near bottom surface 87 moisture and flow of bubbles 86 and spreads in container portions 82 together, discharges from container portions 82.
Like this, in fuel supply device 1 according to the present invention, by utilizing the degasification path (referring to Patent Document 1 steam tap hole) that usually is arranged on the petrolift 20, will be supplied to container portions 82 from the bubble of this discharge, the moisture in the container portions 82 is discharged to outside the container portions.Thereby, needn't add special device, use former fuel pump structure, can remove the moisture of container portions 82, can prevent the such situation of moisture that petrolift 20 attracts in the container portions 82.
Fuel supply device 1 with this structure acts on as follows.At first, when drive motor 10, petrolift 20 actions, the fuel in the fuel tank 2 flows in the container portions 82 by fuel inflow hole 83, is inhaled into from fuel suction port 75 via filter cleaner 21.At this moment, in petrolift 20, impeller 71 and running shaft 33 rotate together, are accompanied by the rotation of impeller 71, and fuel is drawn in the pump chamber 73 from fuel suction port 75.Be fed to the fuel in the pump chamber 73,, be sent fuel ejiction opening 74 by the rotation of impeller 73.On the other hand, the bubble that produces in aspiration procedure is fed in the container portions 82 from degasification path 84, and container portions 82 is stirred.Be sent the fuel of fuel ejiction opening 74, be ejected into fuel flow path 23 in the discharge tube 6 from fuel ejiction opening 14.
Here, fuel is full of in the housing 11, and as previously described, the pressure in the fuel pressure of fuel flow path 23 and the housing 11 is identical.And when fuel pressure surpassed the adjustment pressure of regulation, pressure regulator 50 became the state of opening valve, and the fuel in the housing 11 turns back in the fuel tank 2.Whereby, suitably adjust the pressure of the fuel that is supplied to fuel distribution tube 3 sides.Adjusted the fuel of fuel pressure, passed out to fuel distribution tube 3 from fuel flow path 23.Fuel distribution tube 3 as previously described, is connected on the Fuelinjection nozzle of motor, is supplied to Fuelinjection nozzle from the fuel that fuel tank 2 sucks via fuel distribution tube 3 by fuel supply device 1.
Embodiment 2
Secondly, describe for fuel supply device as embodiments of the invention 2.Fig. 3 is the explanatory drawing of expression as the structure of the fuel supply device of embodiments of the invention 2, (a) represents the structure of container portions 82 and the state of flow of bubble, (b) represents the position that is provided with of degasification path.In addition, in the following embodiments,, give identical label, omit its explanation for member, the part same with embodiment.
In the fuel supply device 1 of Fig. 3, the bottom surface 87 of container portions 82 forms spherical shape.That is, 87 form curved face part 92 in the bottom surface, and the peripheral part 87a of this curved face part is positioned at the top of central part 87b.Like this, shown in Fig. 3 (a), when on bottom surface 87 curved face part 92 being set, flow of bubble 86 rises along curved face part 92.Therefore, accumulate near the moisture the bottom surface 87 of container portions 82, spread from the bottom, discharge from container portions 82 with better efficient.Thereby, more be difficult to accumulate moisture in the bottom of container portions 82, can prevent more effectively that petrolift 20 from attracting moisture.
In this case, curved face part 92 is not only the mode that the bottom surface 87 of container portions 82 is formed sphere, and, as shown in Figure 4, also can the guide plate (guide member) 93 with curved face part 92 be set in the bottom of container portions 82.It is circular-arc shape that guide plate 93 forms the cross section, and the flow of bubble 86 that is ejected into the central part of guide plate 93 rises along the upper side of curved face part 92 to container portions 82.In addition, as shown in Figure 5, also the guide plate (guide member) 94 that the cross section with curved face part 92 is roughly the U font can be set under the opening 85 of degasification path 84.From the flow of bubble 86 of opening 85 ejections, in case after this guide plate 94 reaches the bottom of container portions 82, just rise along the upper side of curved face part 92 to container portions 82.Utilize these guide plates 93,94, near bottom surface 87 moisture that accumulate in container portions 82 spread from the bottom expeditiously, discharge from container portions 82.
Embodiment 3
Fig. 6 is the explanatory drawing of expression as the structure of the fuel supply device of embodiments of the invention 3.In the fuel supply device 101 of Fig. 3, jet pump 102 is set, below petrolift 20 by the jet flow from jet pump 102 ejections, the inside of stirred vessel portion 82.Jet pump 102 is by constituting with the bottom: have the suction casing 104 of nozzle 103, be installed in the pump main body 105 of the bottom of suction casing 104, be installed in the end gap 106 of the underpart of pump main body 105.Form introducing port 107 in suction casing 104, its upper end portion is connected on the degasification path 84.The underpart of introducing port 107 becomes nozzle 103.
Nozzle 103 is inserted in the working room 108 of pump main body 105.Working room 108 is communicated with suction port 109, and the end of suction port 109 is at container portions 82 inner openings.The underpart of working room 108 is communicated with trunnion portion 111, and the stream 112 in the underpart of trunnion portion 111 and the end gap 106 is connected.The end of stream 112 becomes ejiction opening 113, at the bottom opening of container portions 82.
In such jet pump 102, in introducing port 107, supply flow of bubble 86 (arrow A) from degasification path 84.Flow of bubble 86 is increased flow velocity by nozzle 103 throttlings, flows in the working room 108.At this moment, accelerate owing to flow into the flow velocity of the flow of bubble 86 in the working room 108, so, in the downstream portion generation negative pressure of nozzle 103.By this negative pressure, the fuel in the container portions 82 is inhaled into as shown by arrow B from suction port 109.By the fuel that sucks from suction port 109,108 via trunnion portion 111, stream 112 from the working room, is ejected into the bottom of container portions 82 from ejiction opening 113.Flow along the bottom surface 87 of container portions 82 from the jet 114 of ejiction opening 113 ejections.
Like this, by configuration jet pump 102 in container portions 82, by jet 114 from jet pump 102 ejections, the fuel in the stirred vessel portion 82.Whereby, accumulate near bottom surface 87 moisture and in container portions 82, spread, discharge from container portions 82 with jet 114.In addition, in this case, also can be shown in Fig. 4,5, the bottom surface 87 of container portions 82 is formed sphere.
Self-evident, the present invention is not limited to previous embodiment, in the scope that does not break away from its purport, can carry out various changes.
For example, in aforementioned form of implementation, enumerated as the automobile-used use of two-wheel according to fuel supply device example of the present invention, still, its purposes is not limited thereto, and the fuel supply device that can be used as various vehicles such as four wheeler uses.
In addition, the structure of motor 10 and petrolift 20, pressure regulator 50 etc. is an example after all, is not limited to aforementioned structure.For example, as motor 10, enumerated the example that uses 2 pole motors, still, the number of poles of motor is not limited thereto, and also can be 4 pole motors.And then aforementioned electric motivation 10 adopts the cylindraceous commutator of brush from the radial direction sliding contact, still, also can use the commutator of brush from the tablet of axial direction sliding contact.For pressure regulator 50, also can use various pressure regulators.
In addition, in the aforementioned embodiment, enumerated motor and petrolift and the incorporate fuel supply device of pressure regulator, still, also can with add filter, with their incorporate structure applications in the present invention.In addition, for jet pump 102 introducing ports 107, also can not to import the flow of bubble 86 that comes from degasification path 84, but import the fuel that returns that comes from pressure regulator 50.