CN105190013B

CN105190013B - Fuel supply system

Info

Publication number: CN105190013B
Application number: CN201480016303.0A
Authority: CN
Inventors: 下川真辉; 鵤木孝夫; 佐藤浩; 中村太; 中村太一; 小室胜纪; 上野正树; 加藤裕; 加藤裕一; 赤松俊二
Original assignee: Honda Motor Co Ltd; Mitsuba Electric Manufacturing Co Ltd
Current assignee: Honda Motor Co Ltd; Mitsuba Corp
Priority date: 2013-03-26
Filing date: 2014-03-18
Publication date: 2017-03-15
Anticipated expiration: 2034-03-18
Also published as: JP5663624B2; BR112015023734B1; AR095710A1; BR112015023734A2; JP2014190167A; CN105190013A; WO2014156817A1

Abstract

Fuel supply system (1) includes：Petrolift (3)；And discharge the steam vent (27) of steam, including discharge pipe (60), the one end (60a) of the discharge pipe (60) is connected with steam vent (27), and steam flow can be supplied to discharge with the outlet (61) from the other end (60b), the outlet (61) of discharge pipe (60) is configured at the position than steam vent (27) by the top, foreign body is provided with the way of the outer peripheral face for covering outlet (61) and the other end (60b) in the other end (60b) of discharge pipe (60) invades straining element (65), outer peripheral face and foreign body in the other end (60b) of discharge pipe (60) to be invaded and be provided with aerofluxuss discharge path (64) between straining element (65), the aerofluxuss discharge path (64) is connected with the inside of discharge pipe (60) via outlet (61).

Description

Fuel supply system

Technical field

The present invention relates to a kind of fuel supply system.

Japan Patent Patent 2013-063825 of the application based on March 26th, 2013 in Japanese publication is required preferentially Power, and disclosure of which is incorporated herein.

Background technology

Typically, as automatic two-wheeled cycle, the fuel supply device for vehicle of carriage, more configure using in fuel tank Petrolift, supplies it to the so-called built-in fuel supply system in the fuel that device is impregnated in fuel tank.This combustion The petrolift of material feedway includes drawing fuel downward and towards the pressure-feed pumping section of internal combustion engine (electromotor).In addition, The motor part for driving pumping section is provided with above the pumping section.

A kind of petrolift has been recorded in patent documentation 1 for example, and the petrolift includes：Motor, the motor is located at outer Shell；Pumping section, the pumping section are located at shell, and make rotating member rotation by using motor to make fuel boost；Suction inlet, the suction Entrance is located at shell, and is used for for fuel being sucked into pumping section；Outlet, the outlet are located at shell, and for will be by pumping section liter Fuel after pressure is discharged towards the outside；Steam tap, the steam tap are located at shell, and for by the steam produced in pumping section Discharge towards the outside；And nutsch filter, the nutsch filter filtered to the fuel for being attracted to pumping section.Stream is provided with the outside of shell Enter to flow out regulating element, the inflow and outflow regulating element is accordingly arranged with steam tap, it is allowed to which steam is discharged from steam The discharge in hole, and limit foreign body intrusion steam tap.The inflow and outflow regulating element is by the filter element for including porous material Formed, the porous material allows passing through for the steam that discharges from steam tap, and restriction is intended to towards the different of steam tap intrusion Thing passes through.

Prior art literature

Patent documentation

Patent documentation 1：Japanese Patent Laid-Open 2008-274820 publication

Content of the invention

Invention technical problem to be solved

Fuel warp in the petrolift of prior art, in the case of producing eyelet blocking in nutsch filter, in fuel tank It is sucked in petrolift by steam vent.But, the fuel being sucked into via steam vent in petrolift is not filtered by nutsch filter, Accordingly, it is possible to contain foreign body.When foreign body is attracted in petrolift, the rotational resistance of the impeller of petrolift may increase.

Therefore, as the prior art that patent documentation 1 is recorded, it is also contemplated that filter element is set for example on steam vent (filter) is filtered with the fuel to sucking via steam vent, so as to prevent foreign body to be sucked in petrolift.But, when When filter is set on steam vent, the resistance during steam when can become usual action, is discharged, it is thus impossible to discharge well steam Gas, may produce impact to the action of petrolift.

The present invention provides a kind of fuel supply system, and the fuel supply system will not be moved to petrolift in usual action Exert one's influence, when nutsch filter produces eyelet to be blocked, foreign body can be suppressed to invade from steam vent.

Solve the technical scheme adopted by technical problem

According to first technical scheme of the present invention, fuel supply system includes：Petrolift, the petrolift are configured at fuel tank Interior, the fuel in above-mentioned fuel tank is sucked via nutsch filter, and convey towards internal combustion engine pressure；And steam vent, the steam vent will The steam produced in above-mentioned petrolift is discharged.The fuel supply system includes discharge pipe, the one end of the discharge pipe and above-mentioned row Pore connects, and the above-mentioned steam flow that discharges from above-mentioned steam vent can be supplied to discharge with the outlet from the other end, above-mentioned row The above-mentioned outlet of outlet pipe is configured at the position than above-mentioned steam vent by the top, in above-mentioned the other end of above-mentioned discharge pipe covering The mode for covering the outer peripheral face for stating outlet and above-mentioned the other end is provided with foreign body intrusion straining element, in the upper of above-mentioned discharge pipe Aerofluxuss discharge path is provided between the above-mentioned outer peripheral face and above-mentioned foreign body intrusion straining element for stating the other end, aerofluxuss discharge path warp Connected with the inside of above-mentioned discharge pipe by above-mentioned outlet.

According to said structure, the outlet of discharge pipe is configured at the position than steam vent by the top, accordingly, it is capable to suppress to discharge The outlet of pipe is impregnated in the fuel in fuel tank.

In addition, arrange foreign body in the way of the outlet of the other end of covering discharge pipe and the outer peripheral face of the other end invading Enter straining element, therefore, even if the outlet suction fuel from discharge pipe is assumed because the eyelet of nutsch filter is blocked, can also make combustion Material is roundabout on one side to invade straining element while being attracted in foreign body.Thereby, road when fuel is sucked by the outlet from discharge pipe Footpath is elongated, accordingly, it is capable to suppress the intrusion of the foreign body in fuel.In addition, the foreign body in fuel in fuel tank is easily precipitated to down Side, foreign body is less near the outlet of discharge pipe.Therefore, even if petrolift is intended to from discharge pipe because the eyelet of nutsch filter is blocked Outlet attract fuel, also can further suppress the intrusion of the foreign body in fuel.

In addition, between the outer peripheral face and foreign body intrusion straining element of the other end of discharge pipe in setting and discharge pipe The aerofluxuss discharge path of portion's connection, therefore, when eyelet blocking is not produced in nutsch filter, such as when petrolift is started etc., energy Invaded by foreign body and in the way of straining element does not become resistance, discharge steam well, and resistance will not be produced to the starting of petrolift Hinder.

Therefore, fuel supply system of the invention can suppress the fuel for being mixed into foreign body from steam vent suction, and can be reliable Steam is discharged from steam vent in ground.

The present invention the second technical scheme be on the basis of the fuel supply system of the first technical scheme of the invention, including The flange unit of above-mentioned fuel tank is supported and is fixed on to above-mentioned petrolift.Above-mentioned flange unit includes：Flange part, this are convex Edge is installed on the upper wall of above-mentioned fuel tank；Upper lid, is covered on above-mentioned flange part, and covers above-mentioned petrolift on this；And wall Portion, radial outside of the wall portion located at above-mentioned upper lid, and erect from above-mentioned flange part.It is above-mentioned that above-mentioned foreign body invades straining element Flange unit, above-mentioned the other end of above-mentioned discharge pipe are configured between above-mentioned upper lid and above-mentioned wall portion, and by above-mentioned flange part, Above-mentioned upper lid and above-mentioned wall portion cover, above-mentioned the other end above-mentioned outer peripheral face and above-mentioned on lid and above-mentioned wall portion between be provided with Above-mentioned aerofluxuss discharge path.

According to said structure, the flange unit of the fuel supply system of the so-called top loaded type of the upper wall of fuel tank will be installed on Straining element is invaded as foreign body, it is therefore not necessary to foreign body is arranged as another part invades straining element.Therefore, especially exist In the fuel supply system of top loaded type, foreign body can be formed simply and at low cost and invade straining element.

The present invention the 3rd technical scheme be the first technical scheme of the invention or the second technical scheme fuel supply dress On the basis of putting, also can be provided with the above-mentioned outer peripheral face of above-mentioned the other end of above-mentioned discharge pipe and above-mentioned fuel can be filtered Porous member.

According to said structure, the outer peripheral face in the other end of discharge pipe is provided with the porous structure that fuel can be filtered Part, accordingly, it is capable to being attracted to the fuel inside discharge pipe and filtering because the eyelet of nutsch filter is blocked.Accordingly, it is capable to further Foreign body is suppressed to invade.And, the outlet of discharge pipe also will not hinder the discharge function of steam because of aerofluxuss discharge path.Therefore, The fuel supply system of technical solution of the present invention can be reliably suppressed the fuel for being mixed into foreign body from steam vent suction, and can be reliable Steam is discharged from steam vent in ground.

4th technical scheme of the present invention is arbitrary technical side in the first technical scheme of the invention to the 3rd technical scheme On the basis of the fuel supply system of case, the aperture area of above-mentioned discharge pipe may be alternatively formed to the aperture area than above-mentioned steam vent Greatly.

According to said structure, the aperture area of discharge pipe is formed must be bigger than the aperture area of steam vent, therefore, even if in row In the state of the inside of outlet pipe is full of by fuel, the steam that discharges from steam vent also can easily in the internal circulation of discharge pipe. Accordingly, it is capable to the steam that discharges from steam vent is expelled to outside via discharge pipe reliably.

The present invention the 5th technical scheme be on the basis of the fuel supply system of the first technical scheme of the invention, above-mentioned It is barrel member that foreign body invades straining element, and the barrel member has the bottom relative with the above-mentioned outlet of above-mentioned the other end and encloses Around the surrounding wall portion of the above-mentioned outer peripheral face of above-mentioned the other end, and above-mentioned the other end is installed on, in the above-mentioned of above-mentioned the other end Above-mentioned aerofluxuss discharge path is provided between outer peripheral face and the above-mentioned surrounding wall portion of above-mentioned barrel member.

According to said structure, foreign body is formed by barrel member and invades straining element, and as the component different from discharge pipe, because This, can simply form foreign body and invade straining element.

In addition, the height of the surrounding wall portion by adjusting barrel member, can be to the outer peripheral face of the other end of discharge pipe and cylinder structure The lap of the surrounding wall portion of part is adjusted.Thereby, the outer peripheral face and barrel member of the other end of discharge pipe simply can be adjusted Surrounding wall portion between aerofluxuss discharge path length, accordingly, it is capable to by the outlet from discharge pipe because the eyelet of nutsch filter is blocked Path (aerofluxuss discharge path) during suction fuel is set as desired length.Accordingly, it is capable to by the steam based on aerofluxuss discharge path Discharge function and foreign body intrusion suppress function be set as desired balance.

6th technical scheme of the present invention is on the basis of the fuel supply system of the 5th technical scheme of the invention, also may be used The part of either one in the above-mentioned bottom of above-mentioned barrel member and above-mentioned surrounding wall portion is provided with can be carried out to above-mentioned fuel The porous member of filtration.

According to said structure, porous is arranged by a part for either one in the bottom of barrel member and surrounding wall portion Component, can filter to the fuel sucked from the outlet of discharge pipe because the eyelet of nutsch filter is blocked.Accordingly, it is capable to reliably Foreign body is suppressed to invade.And, the part that barrel member is formed by porous member, and the outer peripheral face in the other end of discharge pipe with Aerofluxuss discharge path is set between the surrounding wall portion of barrel member, therefore, will not also hinder the discharge of steam.Therefore, fuel of the invention Even if feedway is when fuel is sucked in petrolift from steam vent, foreign body intrusion can be also reliably suppressed, and can be reliable Ground is discharged by steam from steam vent.

Invention effect

According to above-mentioned fuel supply system, the outlet of discharge pipe is configured at the position than steam vent by the top, accordingly, it is capable to The outlet of discharge pipe is suppressed to impregnated in the fuel in fuel tank.

Description of the drawings

Fig. 1 is the axonometric chart of the fuel supply system of first embodiment.

Fig. 2 is the sectional view of the line A-A along Fig. 1.

Fig. 3 is the sectional view of the line B-B along Fig. 1.

Fig. 4 is the sectional view of the line C-C along Fig. 1.

Fig. 5 is the axonometric chart of lid filter.

Fig. 6 is the explanatory diagram of aerofluxuss discharge path.

Fig. 7 is the axonometric chart of the discharge pipe of the variation of first embodiment.

Fig. 8 is the sectional view of the line D-D along Fig. 7.

Fig. 9 is the axonometric chart of the fuel supply system of second embodiment.

Figure 10 is the sectional view of the E-E lines along Fig. 9.

Figure 11 is the axonometric chart of barrel member.

Figure 12 is the sectional view of the F-F lines along Fig. 9.

Figure 13 is the axonometric chart of the fuel supply system of the variation of second embodiment.

Figure 14 is the sectional view of the G-G lines along Figure 13.

Specific embodiment

(fuel supply system of first embodiment)

Hereinafter, referring to the drawings the fuel supply system of first embodiment is illustrated.In addition, in the following description In, over and under equivalent to vertical over and under, the relative position of the axial direction of petrolift is otherwise referred to as top And lower section.

Fig. 1 is the axonometric chart of the fuel supply system 1 of first embodiment.

Fig. 2 is the sectional view of the line A-A along Fig. 1.

Fig. 3 is the sectional view of the line B-B along Fig. 1.

As shown in figure 1, the fuel supply system 1 of first embodiment is the fuel supply system 1 of so-called top loaded type, such as scheme Shown in 2, which inserts and is installed on the upper wall 2b of fuel tank 2 from the opening 2a of the upper wall 2b for being formed at fuel tank 2 and impregnated in combustion In material.

Fuel supply system 1 includes：Petrolift 3, the petrolift 3 are configured in fuel tank 2；Keeper portion 4, the keeper Portion 4 is installed on the upper wall 2b of fuel tank 2 and petrolift 3 is supported；Nutsch filter 90, the nutsch filter 90 are configured at petrolift 3 Suction side, i.e. downside；And discharge pipe 60 (with reference to Fig. 3), the discharge pipe 60 and the row for being used for discharging the steam in petrolift 3 Pore 27 (with reference to Fig. 3) connection.Hereinafter, each constituent part of fuel supply system 1 is illustrated.

(petrolift)

Petrolift 3 is formed as a generally cylindrical shape, with the motor part 30 being configured on the upside of petrolift 3 and is configured at combustion Pumping section 40 on the downside of material pump 3.In addition, following, illustrated using the axis at the center of petrolift 3 as central shaft O.In addition, with Under, it is referred to as axially, the circumference of petrolift 3 being referred to as circumferential by the direction of the central shaft O along petrolift 3 sometimes.

(motor part)

In motor part 30, for example, can use the dc motor 30a with brush (not shown).In motor part 30 Centre is configured with output shaft 30b, and output shaft 30b is by the downside e axle supporting of the upside of motor part 30 and pumping section 40 into can be from By rotating.

A pair of motors terminal (not shown) with brush electric interlock is provided with the upside of motor part 30.A pair of motors Terminal is connected with wire harness 6, is electrically connected external power source with motor part 30 using wire harness 6, is used for so as to supply from external power source Drive the electric power of dc motor 30a.

In addition, being provided with outlet cap 8 in the upside of motor part 30.The outlet side that fuel is discharged is provided with outlet cap 8 Mouth 31 and the check-valves 74 connected with the discharge port 31.Discharge port 31 is the portion for discharging the fuel drawn by petrolift 3 Position.Check-valves 74 are used for the fuel adverse current for preventing from discharging from discharge port 31.In addition, the lower, outer perimeter in outlet cap 8 is formed with For stage portion 30c riveted by aftermentioned case body 20.

(pumping section)

Pumping section 40 has used the pump of the non-displacement type with impeller 47, and which is by impeller 47 and with the entirety of covering impeller 47 The pump case 45 that mode is formed.

Impeller 47 be for example be made up of resin be shaped generally as discoideus component, which is in the way of it can not rotate against It is connected with the output shaft 30b of motor part 30.Multiple blade parts are formed with the outer circumferential side of the upper surface and lower surface of impeller 47 (not shown).It is formed there through on the wall thickness direction of impeller 47 between above-mentioned multiple blade parts.In addition, being formed with impeller 47 Along the fuel flow path hole (not shown) that wall thickness direction is run through.When the driving using dc motor 30a rotates impeller 47, combustion Stream fuel flow path hole excessively (not shown) and from the downside of impeller 47 upward lateral pressure conveying.

The pump case 45 for covering the entirety of impeller 47 is pressed from both sides by lower house 42, upper shell 43, by lower house 42 and upper shell 43 The middle housing 44 that holds is constituted.Lower house 42, upper shell 43 and middle housing 44 are constituted by the resin with oil resistivity, and pass through example Such as using mould injection molded etc. and formed.

Lower house 42 is shaped generally as discoideus in the way of covering the bottom of impeller 47.In lower house 42 by impeller 47 The surface of side is formed with groove portion (not shown) of the axial top view in substantially C-shaped.In the radial outside of the groove portion one End is formed with the fuel flow path hole (not shown) that runs through along the wall thickness direction of lower house 42.In addition, setting in the bottom of lower house 42 There is fuel suction tube 41.

Fuel suction tube 41 is connected with the fuel flow path hole (not shown) for being formed at lower house 42, and thereby, fuel is by from combustion Material suction tube 41 is drawn in pumping section 40.

Fuel suction tube 41 is connected with the fuel flow path hole (not shown) being formed at lower portion, the position be formed at leaf One end of the groove portion (not shown) of the C-shaped of wheel 47 is corresponding, therefore, position in the peripheral part of housing 42 on the lower is configured at State.

Stage portion 42a that the square ring 46 of rubber system can be supplied to assemble and disassemble is formed with the lower, outer perimeter of lower house 42.

In addition, the thickness direction (above-below direction) being formed with lower house 42 along lower house 42 run through (not shown) logical Hole.The through hole is connected with steam vent 27, diapire 25b of the steam vent 27 through aftermentioned lower cover 25.Thereby, produce in pumping section 40 Steam can be expelled to the outside of pumping section 40 via the steam vent 27 of the through hole of lower house 42 and lower cover 25.

Upper shell 43 is that there is the substantially discoideus component with 30 roughly the same external diameter of motor part.In upper shell 43 Approximate centre is formed with inserting hole 43a, and the output shaft 30b for dc motor 30a is inserted.In addition, inserting hole 43a's Outer circumferential side is formed through the fuel flow path hole (not shown) of the lower surface and upper surface of upper shell 43.Fuel flow path hole with electronic Machine portion 30 connects, and the fuel for coming from the conveying of 47 pressure of impeller flows through.

Middle housing 44 is that there is the substantially a ring-shaped component with 30 roughly the same external diameter of motor part.

It is configured with the way of in the inner side of middle housing 44, the central shaft of housing 44 is consistent with the central shaft of impeller 47 in make Impeller 47.The internal diameter of middle housing 44 is more slightly larger than the external diameter of impeller 47, and in the inner surface 44a of middle housing 44, (i.e. pump case 45 is interior Surface 44a) gap is formed with and the outer peripheral face of impeller 47 between.

In addition, middle housing 44 is configured between upper shell 43 and lower house 42.Herein, the thickness of the axial direction of middle housing 44 with Above-mentioned impeller 47 is roughly the same or slightly thicker than impeller 47.That is, middle housing 44 serve for prevent the upper surface of impeller 47 with Housing 43 lower surface contact and prevent the lower surface of impeller 47 and the upper surface of lower house 42 partition effect.This Outward, between the lower surface of the upper surface and upper shell 43 of impeller 47 and impeller 47 lower surface and lower house 42 upper surface Between be formed with gap.

The efficiency of petrolift 3 depends on each gap being formed between pump case 45 and impeller 47.Each gap is according to wanted The efficiency of the petrolift 3 that asks and be set as setting.

Motor part 30 and pumping section 40 are covered by case body 20.Case body 20 is the substantially cylindrical shape being made up of ferrum etc. Component, its be, for example, by by seamless pipe (seamless pipe) cut off and formation.The upper side end structure of case body 20 Into caulking part 22, and it is riveted in stage portion 30c for being formed at motor part 30.

In addition, the downside end in case body 20 goes out flange part 21 towards radially inner side bending extension.Flange part 21 interior The periphery that the diameter of periphery is set to stage portion 42a than being formed at lower house 42 is slightly larger.Additionally, using stage portion 42a The flange part 21 of bottom surface and case body 20 slightly conquassation square ring 46 is with the state in being clamped.Thereby, it is ensured that shell Sealing between housing 20 and pumping section 40.

(keeper portion)

Petrolift 3 is kept part portion 4 and supports as constructed as above.Keeper portion 4 by brush unit 9, upper lid 10, have bottom tube-like Lower cover 25 constitute, wherein, above-mentioned brush unit 9 is fixed on the upper wall 2b of fuel tank 2, and above-mentioned upper lid 10 is located at brush unit 9 Fuel tank 2 inner side and built-in petrolift 3, above-mentioned lower cover 25 is installed on lid 10, and covers the bottom one of petrolift 3 Side supporting fuel pump 3.

(flange unit)

Flange unit 9 has resinous substantially discoideus flange part 11.The opening with fuel tank 2 in flange part 11 The corresponding positions of 2a are equipped with annular wall 13 (" wall portion " in equivalent to technical scheme) downward.The ring-type of flange part 11 Wall portion 13 is inserted into the opening 2a of the upper wall 2b for being formed at fuel tank 2 from outside (upside), and by the periphery of annular wall 13 Upper wall 2b is installed in the state of the aligned in position of the opening 2a of face and fuel tank 2.Thereby, the upper surface of flange unit 9 is in Expose the state of the outside to fuel tank 2.

The fuel connected with the discharge port 31 of petrolift 3 is provided with flange unit 9 takes out pipe 12.That is, fuel is from row Exit port 31 is taken out 12 pressure of pipe via fuel and is delivered to internal combustion engine.In addition, be provided with brush unit 9 taking out pipe 12 with fuel The pressure regulator 76 of connection, can be to guaranteeing the fuel pressure for specifying towards the pressure-feed fuel of internal combustion engine.

Adapter 9a is provided with the upper surface of flange unit 9.Interlocking is had and is connected with external power source on the adapter 9a Aerial lug.In addition, adapter 9a is electrically connected with the motor part 30 of petrolift 3, and thereby, drive motor portion 30.Additionally, In the inner surface side of flange part 11, and recess 14 is formed with the inner side of annular wall 13, on recess 14 be fixed with lid 10. In addition, 14 interior the other end 60b (the equal references for being configured with aftermentioned discharge pipe 60 of recess between annular wall 13 and upper lid 10 Fig. 3).

(upper lid)

Upper lid 10 is the component of the tubular formed by such as resin etc., and which is set as the outer peripheral face for covering petrolift 3.Upper The lower end of lid 10 has peristome 10a, petrolift 3 can be inserted into peristome 10a from downside.The perisporium 10b of upper lid 10 is from convex Till edge unit 9 extends to the approximately axially centre of petrolift 3.

As shown in figure 1, from the periphery of peristome 10a towards the snap-latch piece 17 for extending axially below circumferentially, equally spaced shape Four positions of the upper lids 10 of Cheng Yu.The front end of the snap-latch piece 17 can carry out elastic deformation towards expanding direction.Snap-latch piece 17 extends To the position slightly on the lower of the pumping section 40 (with reference to Fig. 2) than petrolift 3.It is formed with snap-latch piece 17 and is formed at lower cover The connecting hole 19 of 25 engaging of engaging protuberances 18.Additionally, fastening to carry out lower cover 25 by snap-latch piece 17 with aftermentioned lower cover 25 Axial and circumferential positioning.

(lower cover)

The lower cover 25 for being configured at the suction side of petrolift 3 has been shaped generally as bottom tube-like.The perisporium 25a of lower cover 25 is set Petrolift 3 can be fitted together to for internal diameter and the external diameter degree more slightly smaller than the internal diameter of the perisporium 10b of upper lid 10.

Shape at the position corresponding with the connecting hole 19 of the snap-latch piece 17 for being formed at lid 10 of the perisporium 25a of lower cover 25 The engaging protuberances 18 that Cheng Youneng is engaged with the connecting hole 19.Fastened by the snap-latch piece 17 of upper lid 10 and engaging protuberances 18, made 25 integration of lid 10 and lower cover.Additionally, 25 supporting fuel pump 3 (with reference to Fig. 2) of above-mentioned upper lid 10 and lower cover can be utilized.

Position in the downside of lower cover 25 and by radial outside is formed with the installation portion 26 of liquid level detector (not shown).Peace Dress portion 26 is formed as extending the tabular to be formed towards radial outside, when lower cover 25 is formed, while by being molded type.

In addition, as shown in Fig. 2 being provided with nutsch filter 90 in the downside of lower cover 25.As long as can be by fuel filter for needed for Cleannes, the material of nutsch filter 90 can also be arbitrary.For example, fuel can be sprayed using abrasion powder of bearing etc. can be filtered The action for penetrating valve etc. applies the netted, fibrous of dust of dysgenic size, Porous shape, granular etc. filter.Tool For body, as the material of nutsch filter 90, for example, netted nylon cloth can be used.

Nutsch filter 90 is connected with fuel suction tube 41 via filter discharge pipe 38.Fuel in fuel tank 2 is via suction strainer Device 90 and filter discharge pipe 38 are directed into the fuel suction tube 41 of pumping section 40.Then, fuel flows through in pump case 45 and is pressed Power is delivered to the upside of motor part 30, and takes out pipe 12 via fuel and be carried to internal combustion engine (not shown).

(steam vent)

As shown in figure 3, being formed with aerofluxuss of the through-thickness through the diapire 25b of lower cover 25 in the diapire 25b of lower cover 25 Hole 27.The steam (vapor) produced in petrolift 3 is expelled to the steam vent 27 outside of pumping section 40.Steam vent 27 with The orthogonal cross sectional shapes of central shaft O (i.e. the opening shape of steam vent 27) are shaped generally as toroidal.

(discharge pipe)

Fuel supply system 1 includes discharge pipe 60.The one end 60a for being configured at lower section of discharge pipe 60 is connected with steam vent 27 Connect, which can be such that the steam flow that discharges from steam vent 27 discharges with the outlet 61 from the other end 60b being disposed above.Row Outlet pipe 60 is formed by discharge pipe main part 62 and lid filter 63.

Discharge pipe main part 62 is in the bottom 25b and perisporium 25a of lower cover 25 with including the cross-section including central shaft O When be shaped generally as L-shaped shape.

Discharge pipe main part 62 is integrally formed with lower cover 25.The perisporium 10b of lid 10 on ratio in discharge pipe main part 62 The region of lower end side on the lower is set as the diapire 25b with lower cover 25 and perisporium 25a is close to.

In addition, the region corresponding with the perisporium 10b of upper lid 10 in discharge pipe main part 62 is set as from petrolift 3 Outer peripheral face separates the distance of more than the thickness of the perisporium 10b of upper lid 10.Thereby, when upper lid 10 and lower cover 25 is engaged, in combustion The perisporium 10b of lid 10 is configured between the outer peripheral face and discharge pipe main part 62 of material pump 3.Accordingly, it is capable to the perisporium of above lid 10 Upper lid 10 and lower cover 25 are reliably engaged to keep petrolift 3 by the mode that 10b and discharge pipe main part 62 are not interfered.

Fig. 4 is the sectional view of the line C-C along Fig. 1.As shown in figure 4, discharge pipe main part 62 is formed as width in the circumferential Larger.The cross sectional shape orthogonal with central shaft O (i.e. the opening shape of discharge pipe main part 62) of discharge pipe main part 62 is formed For generally fan-shaped shape.The aperture area of discharge pipe main part 62 is set to the row compared with the opening shape with circular shape The aperture area of pore 27 is sufficiently large.Thereby, even if in the state of the inside of discharge pipe 60 is full of by fuel, from aerofluxuss The steam that hole 27 is discharged is also easily in the internal circulation of discharge pipe 60.

As shown in figure 3, being provided with cylindrical portion 62a in the top of discharge pipe main part 62.Lid filter 63 is coated at the cylinder Portion 62a.

Fig. 5 is the axonometric chart of lid filter 63.Lid filter 63 is the cylinder by will be formed by such as resin etc. A part of outer peripheral face 63c radially cuts off to arrange window portion 63d and arrange for example netted nylon cloth in window portion 63d Formed etc. the porous member 63e that can filter fuel.From end on observation lid filter 63 when aperture area be set to compare The aperture area for playing steam vent 27 is sufficiently large.

As shown in figure 3, the other end 60bs of the upper end 63a of lid filter 63 equivalent to discharge pipe 60.In addition, covering Outlet 61 of the opening of the upper end 63a of filter 63 equivalent to discharge pipe 60.

The internal diameter of lid filter 63 is set to more slightly smaller than the external diameter of cylindrical portion 62a of discharge pipe main part 62.Thereby, energy The bottom 63b of lid filter 63 is coated at cylindrical portion 62a of discharge pipe main part 62, and lid filter 63 can be fixed on Cylindrical portion 62a of discharge pipe main part 62.

The other end 60b (being the upper end 63a of lid filter 63 in the present embodiment) of discharge pipe 60 is configured at In recess 14 between lid 10 and annular wall 13.Additionally, the other end 60b of discharge pipe 60 by flange part 11, upper lid 10 and Annular wall 13 is covered, and outlet 61 is configured at than the position by the top of steam vent 27 and is configured near flange part 11. So, flange unit 9 covers the outlet 61 of discharge pipe 60 being formed by using flange part 11, upper lid 10 and annular wall 13 The foreign body in the foreign body incoming fuel pump 3 in fuel is suppressed to invade straining element 65.Straining element 65 is invaded to foreign body later Effect illustrate.

In addition, between being formed between the outer peripheral face and upper lid 10 and annular wall 13 of the other end 60b of discharge pipe 60 Gap.The gap constitutes the aerofluxuss discharge path 64 that the outlet 61 via discharge pipe 60 is connected with the inside of discharge pipe 60.Therefore, from The steam that steam vent 27 is discharged can be expelled to fuel supply system 1 via discharge pipe 60, outlet 61 and aerofluxuss discharge path 64 Outside.

(effect of the fuel supply system of first embodiment)

Then, the effect of the fuel supply system 1 of first embodiment is illustrated.

As shown in Fig. 2 when the motor part 30 of petrolift 3 is driven, output shaft 30b rotates, and so that phase can not be carried out The impeller 47 that the mode for rotating is connected with output shaft 30b is rotated.By impeller 47 rotate and in impeller 47 and pump case 45 Between produce vortex flow.

Pumping section 40 makes fuel boost using the vortex flow.Additionally, fuel of the pumping section 40 in fuel tank 2 passes through nutsch filter 90 Fuel is sucked via filter discharge pipe 38 from fuel suction tube 41 in the state of after being filtered.

Fig. 6 is the explanatory diagram of aerofluxuss discharge path 64.In addition, when the chain-dotted line in Fig. 6 represents the state that fuel is fully full of The liquid level S1 of the fuel under (or state close with the state), the double dot dash line in Fig. 6 represent consume prescribed quantity of fuel and In than annular wall 13 lower end edge portion on the lower when fuel liquid level S2.In addition, the arrow V in Fig. 6 represents steam Circulation, the circulation of fuel when arrow F represents the liquid level S1 of fuel.

Steam in pumping section 40 (with reference to Fig. 3) is discharged from steam vent 27 together with the fuel after boosting.Additionally, such as Fig. 6 institutes Show, outer peripheral face and upper lid 10 and ring of the steam that discharges from steam vent 27 (with reference to Fig. 3) via the other end 60b of discharge pipe 60 Aerofluxuss discharge path 64 between shape wall portion 13 is expelled to the outside of fuel supply system 1.Now, aerofluxuss discharge path 64 is via discharge Mouth 61 is connected with the inside of discharge pipe 60, and therefore, invading straining element 65, lid filter 63 etc. with foreign body does not become the side of obstruction Formula discharges steam well.

In addition, as shown in figure 3, when fuel supply system 1 carries out action, it is assumed that produce eyelet blocking in nutsch filter 90 In the case of, fuel supply system 1 is from the outlet 61 of the other end 60b of discharge pipe 60 via steam vent 27 towards petrolift 3 Interior effect captivation.

However, in the fuel supply system of prior art, surface of the steam vent located at the lower section of petrolift.Therefore, existing The state that the steam vent for having the fuel supply system of technology impregnated in the fuel in fuel tank is elongated.Therefore, the foreign body in fuel May be sucked in petrolift together with fuel via steam vent in the way of not filtered by nutsch filter.

On the other hand, the outlet 61 of the discharge pipe 60 of the fuel supply system 1 of present embodiment is configured at and compares steam vent 27 positions by the top, and it is configured at the vicinity of flange part 11.Therefore, it is suppressed that the fuel supply system 1 of present embodiment Outlet 61 impregnated in the fuel in fuel tank 2.In addition, the foreign body in fuel is easily precipitated to because of gravity under fuel tank 2 Side, foreign body is less near the outlet 61 of discharge pipe 60.Therefore, it is suppressed that the foreign body in fuel is via the row being disposed above The outlet 61 of outlet pipe 60 and be attracted in petrolift 3.

Herein, for example the state (state of the liquid level S1 of Fig. 6) of enough fuel is filled with and in nutsch filter in fuel tank 2 In the case of producing eyelet blocking in 90, fuel is attracted.But, the outlet 61 of discharge pipe 60 by flange part 11, on Lid 10, annular wall 13 are covered, and therefore, fuel is roundabout in flange part 11, upper lid 10 and annular wall 13, and are covered by being located at The porous member 63e of filter 63 and be attracted (with reference to the arrow F in Fig. 6).Thereby, fuel is by the outlet 61 from discharge pipe 60 Path during suction is elongated, and filters fuel using porous member 63e, therefore, the foreign body in fuel can be suppressed to invade.That is, Flange unit 9 covers the outlet 61 of discharge pipe 60 forming suppression by using flange part 11, upper lid 10 and annular wall 13 Foreign body in foreign body incoming fuel pump 3 in fuel invades straining element 65.

Additionally, fuel for example in the fuel tank 2 for consuming ormal weight and cause the liquid level of fuel to be located at than annular wall , on the lower under the state (state of the liquid level S2 of Fig. 6) of position, aerofluxuss discharge unit 64 is not by the liquid of fuel for the lower end edge portion in portion 13 Face S2 (with reference to Fig. 6) blocking, and the state that the air being in fuel tank 2 easily circulates.Therefore, fuel liquid level be located at than The lower end edge portion of annular wall 13 is produced under the state (state of the liquid level S2 in Fig. 6) of position and in nutsch filter 90 on the lower In the case that raw eyelet is blocked, the air in fuel tank 2 is attracted.Thereby, inclusion of air is supplied when electromotor is started Fuel in, therefore, performance when user can be started according to electromotor detect early nutsch filter 90 eyelet blocking.

(effect of first embodiment)

According to present embodiment, the outlet 61 of discharge pipe 60 is configured at the position than steam vent by the top, accordingly, it is capable to press down The outlet 61 of discharge pipe processed 60 is impregnated in the fuel in fuel tank 2.

In addition, in the way of the outlet 61 of the other end 60b of covering discharge pipe 60 and the outer peripheral face of the other end 60b Foreign body is set and invades straining element 65, therefore, even if assuming to be intended to the discharge from discharge pipe 60 because the eyelet of nutsch filter 90 is blocked Mouth 61 attracts fuel, and fuel also roundabout can invade straining element 65 in foreign body, while being inhaled by porous member 63e Draw.Thereby, path when fuel is sucked by the outlet 61 from discharge pipe 60 is elongated, and filters combustion using porous member 63e Material, therefore, can suppress the foreign body in fuel to invade.In addition, the foreign body in fuel in fuel tank 2 is easily precipitated to lower section, Nearby foreign body is less for the outlet 61 of discharge pipe 60.Therefore, even if petrolift 3 is intended to from discharge because the eyelet of nutsch filter 90 is blocked The outlet 61 of pipe 60 attracts fuel, also can further suppress the intrusion of the foreign body in fuel.

In addition, the outer peripheral face and foreign body in the other end 60b of discharge pipe 60 invades setting and row between straining element 65 The aerofluxuss discharge path 64 of the inside connection of outlet pipe 60, therefore, when eyelet blocking is not produced in nutsch filter 90, such as in fuel When pump 3 is started etc., can be invaded in the way of straining element 65 does not become resistance by foreign body and discharge steam well, and will not be to fuel The starting of pump 3 produces obstruction.

Therefore, the fuel supply system 1 of present embodiment can suppress the fuel for being mixed into foreign body from the suction of steam vent 27, and Steam can be discharged from steam vent 27 reliably.

In addition, the flange unit 9 of the fuel supply system 1 of the so-called top loaded type of the upper wall 2b for being installed on fuel tank 2 is made Straining element 65 is invaded for foreign body, it is therefore not necessary to foreign body is arranged as another part invades straining element 65.Therefore, especially In the fuel supply system 1 of top loaded type, foreign body can be formed simply and at low cost and invade straining element 65.

In addition, the part in the outer peripheral face of the other end 60b of discharge pipe 60 arranges porous member 63e, accordingly, it is capable to right It is attracted to a part of fuel in discharge pipe 60 and is filtered because the eyelet of nutsch filter 90 is blocked.Accordingly, it is capable to further suppress Foreign body is invaded.And, the outlet 61 of discharge pipe 60 also will not hinder the discharge function of steam because of porous member 63e.Therefore, Even if the fuel supply system of present embodiment 1 also reliably can press down when fuel is sucked in petrolift 3 from steam vent 27 Foreign body processed is invaded, and reliably can be discharged steam from steam vent 27.

In addition, the aperture area of discharge pipe 60 formed must be bigger than the aperture area of steam vent 27, therefore, even if in discharge pipe In the state of 60 inside is full of by fuel, the steam that discharges from steam vent 27 also easily can be flowed in the inside of discharge pipe 60 Logical.Accordingly, it is capable to the steam that discharges from steam vent 27 is expelled to outside via discharge pipe 60 reliably.

(variation of first embodiment)

Fig. 7 is the axonometric chart of the discharge pipe 60 of the variation of first embodiment, and Fig. 8 is cuing open for the line D-D along Fig. 7 View.In addition, in Fig. 7 and Fig. 8, in order to easy to understand and only illustrate discharge pipe 60, and rightly eliminate other zero The diagram of part.In addition, in fig. 8, steam vent 27 is illustrated with double dot dash line.

The discharge pipe main part 62 of the discharge pipe 60 of first embodiment is formed as the larger (reference picture of width in the circumferential 4).

On the other hand, as shown in fig. 7, the discharge pipe 60 of the variation of first embodiment is formed in discharge pipe main part 62 For different from first embodiment on this aspect cylindric.In addition, omit constituting the detailed of part with first embodiment identical Illustrate, and only different parts is illustrated.

As shown in fig. 7, the outward appearance of the discharge pipe 60 of the variation of first embodiment is shaped generally as L-shaped shape.Such as Fig. 8 Shown, the aperture area of the one end 60a of discharge pipe 60 is set to bigger than the aperture area of steam vent 27.In addition, discharge pipe It is sufficiently large that the aperture area of main part 62 is set to the aperture area of the one end 60a compared with discharge pipe 60.Thereby, i.e., Just, in the state of the inside of discharge pipe 60 is full of by fuel, the steam that discharges from steam vent 27 is also easily in discharge pipe 60 Circulate in portion.

The shape of discharge pipe 60 is not limited to the variation of first embodiment and first embodiment, can carry out various Change.

(second embodiment)

Fig. 9 is the axonometric chart of the fuel supply system 100 of second embodiment.

Then, the fuel supply system 100 of second embodiment is illustrated.

The fuel supply system 1 of first embodiment is mounted to the fuel of the so-called top loaded type of the upper wall 2b of fuel tank 2 Feedway 1, forms foreign body by flange unit 9 and invades straining element 65.

On the other hand, the fuel supply system 100 of second embodiment is being mounted to the lower wall (not shown) of fuel tank So-called low-laying type fuel supply system 100, and foreign body formed by barrel member 163 invade on straining element 165 this aspect and the One embodiment is different.In addition, omit the detailed description for constituting part with first embodiment identical, and only to different portions Divide and illustrate.

Fuel supply system 100 shown in Fig. 9 includes：Petrolift 3, the petrolift 3 are configured in fuel tank；Keeper portion 4, the keeper portion 4 is installed on the lower wall of fuel tank and petrolift 3 is supported；And discharge pipe 160, the discharge pipe 160 Connect with the steam vent 27 for discharging the steam in petrolift 3.Hereinafter, each constituent part of fuel supply system 100 is entered Row explanation.

Petrolift 3 is formed as a generally cylindrical shape, with the motor part 30 being configured on the upside of petrolift 3 and is configured at combustion Pumping section 40 on the downside of material pump 3.

Petrolift 3 is supported by keeper portion 4.Keeper portion 4 is made up of flange unit 9, lower cover 125 and upper lid 110, its In, above-mentioned flange unit 9 is fixed on the lower wall of fuel tank, and above-mentioned lower cover 125 is located at the inner side of the fuel tank of flange unit 9 and right The bottom of petrolift 3 is supported, and above-mentioned upper lid 110 is installed on lower cover 125, and covers petrolift 3 from top.

(flange unit)

Flange unit 9 flange part 11 the position corresponding with the opening (not shown) of the lower wall of fuel tank upward It is equipped with annular wall 13.Annular wall 13 is inserted into flange part 11 opening for the lower wall that is formed at fuel tank from outside (downside) It is installed under fuel tank in the state of oral area, and the aligned in position of the opening of the outer peripheral face in annular wall 13 and fuel tank Wall.Therefore, the state of outside of the lower surface of flange unit 9 in exposing to fuel tank.

Fuel is provided with flange unit 9 and takes out pipe 12, conveyed towards internal combustion engine pressure with taking out pipe 12 via fuel, its In, above-mentioned fuel is taken out pipe 12 and is connected with the discharge port 31 of the upside located at petrolift 3.In addition, the outlet side in petrolift 3 The upside of mouth 31 is provided with takes out the pressure regulator 76 that pipe 12 is connected with fuel, can be to guaranteeing towards the pressure-feed fuel of internal combustion engine The fuel pressure of regulation.

Adapter 9a is provided with the lower surface of flange unit 9, is electrically connected with the motor part 30 of petrolift 3 electronic to drive Machine portion 30.

Nutsch filter 90 is accommodated with the inside of flange unit 9.Nutsch filter 90 is connected with the fuel suction tube 41 of pumping section 40.Combustion Fuel in hopper flow through nutsch filter 90 and by filtration after, drawn by pumping section 40.

(lower cover)

Lower cover 125 is the component of the tubular formed by such as resin etc., and which is set as the periphery of the bottom for covering petrolift 3 Face.There is peristome 125a in the upper end of lower cover 125, petrolift 3 can be inserted into peristome 125a from upside.

(upper lid)

Upper lid 110 is configured to cover petrolift 3 from upside, and has been shaped generally as bottom tube-like.Upside in upper lid 110 And the position by radial outside is formed with the installation portion 26 of liquid level detector (not shown).

It is formed with because of step 111a and expanding wide diameter portion 111 in the bottom of upper lid 110.Outer peripheral face in wide diameter portion 111 Engagement pawl for example (not shown) is provided with, can be engaged with lower cover 125.

In addition, being provided with the through hole 111b for running through along the vertical direction in the step 111a of wide diameter portion 111.Aftermentioned discharge pipe 160 Insert through hole 111b.

In addition, the limiting member 135 of ring-type is coated at the outer circumferential side of the wide diameter portion 111 of lid 110.Limiting member 135 pairs The snap portions of upper lid 110 and lower cover 125 are limited towards the displacement of radial outside.Thereby, it is suppressed that upper lid 110 and lower cover 125 engaging is released from.

(discharge pipe)

Fuel supply system 100 includes discharge pipe 160.Discharge pipe 160 is the structure of the tubulose formed by metals such as such as ferrum Part, is bent to such as substantially L-shaped when side-looking is observed.Discharge pipe 160 is formed with 110 split of upper lid.

The one end 160a for being configured at lower section of discharge pipe 160 is connected with the steam vent 27 of the lower section of pumping section 40, and which can make The steam flow that discharges from steam vent 27 is arranged with the outlet 161 (with reference to Figure 10) from the other end 160b being disposed above Go out.

Discharge pipe main part 162 extends in the way of along central shaft O upward.Discharge pipe main part 162 and center The orthogonal cross sectional shapes of axle O are formed as such as circular shape.The aperture area of discharge pipe main part 162 and first embodiment Identical it is set to compared with the aperture area of steam vent 27 be sufficiently large.

(foreign body intrusion straining element)

Figure 10 is the sectional view of the E-E lines along Fig. 9.In addition, the arrow V in Figure 10 represents the circulation of steam, arrow F tables Show the circulation of fuel.

As shown in Figure 10, the other end 160b in discharge pipe 160 is provided with foreign body intrusion in the way of covering outlet 161 Straining element 165 is barrel member 163.When barrel member 163 is the side-looking observation formed by such as metal etc., section is in substantially medicated cap The component of shape, its have the bottom 163a relative with the outlet 161 of the other end 160b of discharge pipe 160 and around discharge Surrounding wall portion 163c of the outer peripheral face of the other end 160b of pipe 160.

Figure 11 is the axonometric chart of barrel member 163.

As shown in figure 11, a part for surrounding wall portion 163c is radially cut off to arrange window portion 163d by barrel member 163, and is set Put for blocking the porous member 163e of for example netted nylon cloth of window portion 163d etc..

As shown in Figure 10, it is sufficiently large that the internal diameter of barrel member 163 is set to compared with the external diameter of discharge pipe 160.Thereby, Gap is formed between surrounding wall portion 163c of the outer peripheral face and barrel member 163 of the other end 160b of discharge pipe 160, with supply and discharge Gas discharge path 164 is arranged.

Figure 12 is the sectional view of the F-F lines along Fig. 9.

As shown in figure 12, it is formed with the opening of the bottom 163b of barrel member 163 towards being fitted together to that radially inner side is projected Portion 163f.Fitting portion 163f is formed at three positions with substantially 120 ° of spacing in the such as circumference of barrel member 163.From barrel member 163 center is sized to less than the radius of the outer peripheral face of discharge pipe 160 to each fitting portion 163f.Thereby, cylinder The bottom 163b of component 163 is coated at the outer peripheral face of the other end 160b of discharge pipe 160 using each fitting portion 163f.Each Aerofluxuss discharge path 164 is formed between fitting portion 163f.Each aerofluxuss discharge path 164 is via outlet 161 (with reference to Figure 10) and row The inside of outlet pipe 160 directly connects.

Herein, as shown in Figure 10, the week of barrel member 163 is rightly set according to the intrusion inhibition level of required foreign body The height (i.e. the length of the above-below direction of surrounding wall portion 163c in Figure 10) of wall portion 163c.Specifically, by adjusting surrounding wall portion The height of 163c, can be to the outer peripheral face of the other end 160b of discharge pipe 160 and the lap of surrounding wall portion 163c of barrel member 163 α is adjusted, and can be between the outer peripheral face of the other end 160b of discharge pipe 160 and surrounding wall portion 163c of barrel member 163 The length of aerofluxuss discharge path 164 is adjusted.Additionally, by the height for increasing surrounding wall portion 163c, and increase the another of discharge pipe 160 The outer peripheral face of one end 160b and the lap α of surrounding wall portion 163c of barrel member 163, can increase the length of aerofluxuss discharge path 164, And suppress the intrusion of foreign body.Intrusion according to the discharge function and foreign body of the steam of aerofluxuss discharge path 164 suppresses the balance of function Lap α is rightly set.

(effect of the fuel supply system of second embodiment)

Then, the effect of the fuel supply system 100 of second embodiment is illustrated.

As shown in figure 9, the steam in pumping section 40 is discharged from steam vent 27 together with the fuel after boosting.Additionally, such as Figure 10 Shown, the steam discharged from steam vent 27 (with reference to Fig. 9) outer peripheral face and barrel member via the other end 160b of discharge pipe 160 Each aerofluxuss discharge path 164 between 163 surrounding wall portion 163c is expelled to the outside of fuel supply system 100 (with reference to Fig. 9).This When, each aerofluxuss discharge path 164 is directly connected with the inside of discharge pipe 160 via outlet 161, and therefore, foreign body is invaded and suppresses unit Part 165 is that barrel member 163, the porous member 163e of surrounding wall portion 163c etc. located at barrel member 163 will not become obstruction.Therefore, Steam is expelled to the outside of fuel supply system 100 (with reference to Fig. 9) well.

In addition, as shown in figure 9, when fuel supply system 100 carries out action, it is assumed that produce eyelet in nutsch filter 90 and block up In the case of plug, fuel supply system 100 from the outlet 161 (with reference to Figure 10) of the other end 160b of discharge pipe 160 via Steam vent 27 is sucked in petrolift 3.Herein, the outlet of the discharge pipe 160 of the fuel supply system 100 of second embodiment 161 are located at position than steam vent 27 by the top, and are configured at the pressure regulator 76 of the bottom than upper lid 110 position by the top Put.Therefore, identical with first embodiment, it is suppressed that the outlet 161 of the fuel supply system 100 of second embodiment impregnates Fuel in fuel tank.In addition, the tendency that the foreign body in fuel is precipitated in the lower section because of gravity towards fuel tank.Therefore, The foreign body in fuel is inhibited to be attracted in petrolift 3 via the outlet 161 of discharge pipe 160.

In addition, although be extremely rare situation, but for example in the state of the fuel in fuel tank is sufficiently filled with, arrange The other end 160b of outlet pipe 160 is impregnated in fuel, and in nutsch filter 90 produce eyelet block in the case of, fuel by from The outlet 161 of discharge pipe 160 is sucked.

But, as shown in Figure 10, it is barrel member 163 that the outlet 161 of discharge pipe 160 is invaded straining element 165 by foreign body Bottom 163a and surrounding wall portion 163c cover, therefore, roundabout bottom 163a and surrounding wall portion 163c in barrel member 163 of fuel, and It is attracted by each aerofluxuss discharge path 164.Thereby, path when fuel is sucked by the outlet 161 from discharge pipe 160 is elongated, Therefore, it is suppressed that the intrusion of the foreign body in fuel.

In addition, as shown in figure 11, being provided with porous member 163e in a part for surrounding wall portion 163c of barrel member 163.Therefore, The a part of fuel being sucked in discharge pipe 160 is filtered by porous member 163e.

(effect of second embodiment)

According to the fuel supply system 100 of second embodiment, foreign body is formed by barrel member 163 and invades straining element 165, And used as the component different from discharge pipe 160, accordingly, it is capable to simply forming foreign body invades straining element 165.

In addition, the height of surrounding wall portion 163c by adjusting barrel member 163, can adjust the other end of discharge pipe 160 The lap α of surrounding wall portion 163c of the outer peripheral face of 160b and barrel member 163.Thereby, the another of discharge pipe 160 simply can be adjusted The length of the aerofluxuss discharge path 164 between surrounding wall portion 163c of the outer peripheral face of end 160b and barrel member 163, accordingly, it is capable to by because The eyelet blocking of nutsch filter 90 and from the outlet 161 of discharge pipe 160 suction fuel when path (aerofluxuss discharge path 164) set It is set to desired length.Accordingly, it is capable to the intrusion of the discharge function and foreign body of the steam based on aerofluxuss discharge path 164 is suppressed function It is set as desired balance.

In addition, porous member 163e is arranged by a part for surrounding wall portion 163c in barrel member 163, can be to because of nutsch filter The fuel that 90 eyelet is blocked and sucked from the outlet 161 of discharge pipe 160 is filtered.Accordingly, it is capable to be reliably suppressed foreign body Invade.And, porous member 163e is set in a part for barrel member 163, in the periphery of the other end 160b of discharge pipe 160 Aerofluxuss discharge path 164 is set between surrounding wall portion 163c of face and barrel member 163, therefore, also will not be hindered because of porous member 163e Hinder the discharge function of steam.Therefore, even if the fuel supply system of second embodiment 100 is inhaled into from steam vent 27 in fuel During to petrolift 3, foreign body intrusion can be also reliably suppressed, and reliably steam can be discharged from steam vent 27.

(fuel supply system of the variation of second embodiment)

Figure 13 is the axonometric chart of the fuel supply system 100 of the variation of second embodiment.

The fuel supply system 1 of first embodiment is the fuel supply system 1 of so-called top loaded type, by 9 shape of flange unit Into foreign body invade the outside (with reference to Fig. 6) that straining element 65 is formed at upper lid 10.

The fuel supply system 100 of second embodiment is the fuel supply system 100 of so-called low-laying type, and foreign body invades suppression Element processed 165 is the outside (with reference to Fig. 9) that barrel member 163 is formed at lid 110.

On the other hand, as shown in figure 13, the fuel supply system 200 of the variation of second embodiment is in upper lid 210 It is provided with discharge pipe 260 and lid filter 263, and foreign body invades the inner side that straining element 265 is formed at lid 210, this point and the One embodiment and second embodiment are different.In addition, omit constituting with first embodiment and second embodiment identical Partial detailed description, and only different parts is illustrated.

Discharge pipe 260 is connected with the steam vent 27 of the lower section of pumping section 40, and is prolonged in the way of along central shaft O upward Stretch.Lid filter 263 is coated at the front end of discharge pipe 260.In addition, the lid filter of lid filter 263 and first embodiment 63 (with reference to Fig. 5) are identical, therefore, omit the description.

Figure 14 is the sectional view of the G-G lines along Figure 13.In addition, the chain-dotted line in Figure 14 represents the shape that fuel is fully full of The liquid level S1 of fuel during state under (or state close with the state), the double dot dash line in Figure 14 are represented and are consumed ormal weight combustion The liquid level S2 of fuel during material.In addition, the arrow V in Figure 14 represents the circulation of steam, the stream of fuel when arrow F represents trunkful Logical.

As shown in figure 14, upper lid 210 is included from the front end of outer side covers discharge pipe 260 and the cylindrical portion of lid filter 263 212.Stage portion 215 is provided with the inside of cylindrical portion 212.The lower surface 215a of stage portion 215 is configured at for example than lid filter 263 porous member 263e positions more on the lower.The internal diameter of cylindrical portion 212 is configured to filter compared with discharge pipe 260 and lid The external diameter of device 263 is sufficiently large.Thereby, in the inner circumferential of the outer peripheral face and barrel member 212 of discharge pipe 260 and lid filter 263 Gap is formed between face, so that aerofluxuss discharge path 264 is arranged.The cylindrical portion 212 of upper lid 210 is by covering discharge pipe 260 Outlet 261 and the foreign body that forms the foreign body incoming fuel pump 3 (with reference to Figure 13) suppressed in fuel invades straining element 265.

(effect of the fuel supply system of the variation of second embodiment)

Steam in pumping section 40 (with reference to Figure 13) is discharged from steam vent 27 (with reference to Figure 13) together with the fuel after boosting.Connect , the steam that discharges from steam vent 27 passes through the outer peripheral face and the outer peripheral face and cylinder of lid filter 263 of the upper end of discharge pipe 260 Aerofluxuss discharge path 264 between the inner peripheral surface in shape portion 212 is expelled to the outside of fuel supply system 200 via upper lid 210.

In addition, as shown in figure 13, when fuel supply system 200 carries out action, it is assumed that produce eyelet in nutsch filter 90 In the case of blocking, fuel supply system 200 is from the outlet 261 (with reference to Figure 14) of the other end of discharge pipe 260 via row Pore 27 is towards effect captivation in petrolift 3.Herein, as shown in figure 14, the shape of enough fuel is for example filled with fuel tank State (state of the liquid level S1 of Figure 14) and produce in nutsch filter 90 (with reference to Figure 13) in the case that eyelet blocks, fuel is carried out Attract.But, the outlet 261 of discharge pipe 260 is covered by cylindrical portion 212.Therefore, fuel side is roundabout in discharge pipe 260 Between the inner peripheral surface of the outer peripheral face and cylindrical portion 212 of the outer peripheral face of upper end and lid filter 263, via located at lid filtration The porous member 263e of device 263 and be attracted (with reference to Figure 14 arrow F).Thereby, road when fuel is sucked from discharge pipe 260 Footpath is elongated, and filters fuel using porous member 263e, therefore, the foreign body in fuel can be suppressed to invade.That is, upper lid 210 Cylindrical portion 212 forms the 3 (reference picture of foreign body incoming fuel pump suppressed in fuel by covering the outlet 261 of discharge pipe 260 3) foreign body in invades straining element 265.

Additionally, the liquid level of the fuel and fuel in the fuel tank for for example consuming ormal weight is located at than stage portion 215 Under the state (state of the liquid level S2 in Figure 14) of lower surface 215a positions on the lower, the air in cylindrical portion 212 is in appearance The state for easily circulating.Therefore, fuel liquid level be located at than stage portion 215 lower surface 215a on the lower position state (figure The state of the liquid level S2 in 14) under and produce in nutsch filter 90 (with reference to Figure 13) in the case that eyelet blocks, to cylindrical portion Air in 212 is attracted.Thereby, in the fuel that inclusion of air is supplied when electromotor is started, therefore, user energy according to Performance when electromotor is started detects the eyelet blocking of nutsch filter 90 early.

In addition, the technical scope of the present invention is not limited to above-mentioned embodiment, also can be in the model without departing from inventive concept Various changes are carried out in enclosing.

It is flange unit 9 that the foreign body of first embodiment invades straining element 65, and the foreign body of second embodiment invades suppression Element processed 165 is barrel member 163, but the shape of foreign body intrusion straining element 65,165 is not limited to first embodiment and second Embodiment, can carry out various changes.

Also the foreign body that the foreign body of first embodiment invades straining element 65 and second embodiment can be invaded suppression unit Part 165 is combined.That is, in the fuel supply system 1 of top loaded type, the flange part 11 of flange unit 9, upper lid are possible with 10 and annular wall 13 cover the outlet 61 of discharge pipe 60 and invade straining element 65 to arrange the first foreign body, and by barrel member Cylindrical portion 62a of 163 tops for being coated at discharge pipe main part 62 invades straining element 165 to arrange the second foreign body.

The fuel supply system 1 of first embodiment includes being provided with the upper end of discharge pipe 60 lid of porous member 63e Filter 63, but also can be without lid filter 63.But, by including lid filter 63, even if fuel of the hypothesis in fuel tank 2 In the case of being inhaled into via aerofluxuss discharge path 64 and discharge pipe 60, also the part sucked by porous member 63e can be fired Material is filtered.Therefore, on suction this aspect for the foreign body that further can suppress in fuel, present embodiment is that have superiority 's.

The nutsch filter 90 of the fuel supply system 1 of first embodiment is configured at the downside of lower cover 25.In addition, second implements The nutsch filter 90 of the fuel supply system 100 of mode is configured at the inside of flange unit 9.On the other hand, also can be by each embodiment party The foreign body of formula invades straining element 65,165 and is applied to including the filter unit including such as nutsch filter located at the outer of fuel tank In the fuel supply system of the so-called external filter type in portion.

In this second embodiment, the part in surrounding wall portion 163c of barrel member 163 is provided with porous member 163e.With this Relative, both porous member 163e can be set in a part of the bottom 163a of such as barrel member 163 only, it is also possible in barrel member A part of a part for 163 surrounding wall portion 163c and bottom 163a arranges porous member 163e.Following alternatively, it is also possible to adopt Structure：Discharge pipe 160 is covered using barrel member 163 in the way of porous member 163e not to be located at a part for barrel member 163 Outlet 161 and form aerofluxuss discharge path 164.

Industrial utilizability

Therefore, above-mentioned fuel supply system can suppress to be mixed into the fuel of foreign body from steam vent suction, and can reliably from Steam vent discharges steam.

(symbol description)

1st, 100,200 fuel supply system

2 fuel tanks

3 petrolifts

9 flange units

10th, cover on 110,210

11 flange parts

13 annular walls (wall portion)

27 steam vents

60th, 160 discharge pipe

60a, 160a one end

60b, 160b the other end

61st, 161,261 outlet

63e, 163e, 263e porous member

64th, 164,264 aerofluxuss discharge path

65th, 165,265 foreign bodies invade straining element

90 nutsch filter

163 barrel members

163a bottoms

163c surrounding wall portions

Claims

1. a kind of fuel supply system, including：

Petrolift, the petrolift are configured in fuel tank, suck the fuel in the fuel tank via nutsch filter, and towards internal combustion engine Pressure is conveyed；And

The steam produced in the petrolift is discharged by steam vent, the steam vent,

Characterized in that,

Including discharge pipe, the one end of the discharge pipe is connected with the steam vent, and can be supplied from described in steam vent discharge Steam flow is discharged with the outlet from the other end,

The outlet of the discharge pipe is configured at the position than the steam vent by the top,

Set in the way of the outer peripheral face for covering the outlet and described the other end in described the other end of the discharge pipe There is foreign body to invade straining element,

The outer peripheral face and the foreign body in described the other end of the discharge pipe to be invaded and be provided with aerofluxuss between straining element Discharge path, the aerofluxuss discharge path are connected with the inside of the discharge pipe via the outlet,

Including being supported and being fixed on the flange unit of the fuel tank to the petrolift,

The flange unit includes：

Flange part, the flange part are installed on the upper wall of the fuel tank；

Upper lid, is covered on the flange part, and covers the petrolift on this；And

Wall portion, radial outside of the wall portion located at the upper lid, and erect from the flange part,

It is the flange unit that the foreign body invades straining element,

Described the other end of the discharge pipe is configured between the upper lid and the wall portion, and by the flange part, described Upper lid and the wall portion are covered,

Described the other end the outer peripheral face and described on lid and the wall portion between be provided with the aerofluxuss discharge path.

2. a kind of fuel supply system, including：

Characterized in that,

The flange unit includes：

Flange part, the flange part are installed on the lower wall of the fuel tank；And

Upper lid, is covered on the flange part, and covers the petrolift on this,

The foreign body invades either one that straining element is formed in the outside and inner side of the upper lid.

3. fuel supply system as claimed in claim 2, it is characterised in that

It is barrel member that the foreign body invades straining element, and the barrel member has relative with the outlet of described the other end Bottom and the surrounding wall portion of the outer peripheral face around described the other end, and described the other end is installed on,

The aerofluxuss discharge path is provided between the surrounding wall portion of the outer peripheral face and the barrel member of described the other end.

4. fuel supply system as claimed in claim 3, it is characterised in that

The part of either one in the bottom of the barrel member and the surrounding wall portion is provided with can be to the fuel The porous member for being filtered.

5. the fuel supply system as any one of Claims 1-4, it is characterised in that

The outer peripheral face in described the other end of the discharge pipe is provided with the porous member that the fuel can be filtered.

6. the fuel supply system as any one of Claims 1-4, it is characterised in that

The aperture area of the discharge pipe is formed as bigger than the aperture area of the steam vent.

7. fuel supply system as claimed in claim 5, it is characterised in that