CN105190013A

CN105190013A - Fuel supply device

Info

Publication number: CN105190013A
Application number: CN201480016303.0A
Authority: CN
Inventors: 下川真辉; 鵤木孝夫; 佐藤浩; 中村太一; 小室胜纪; 上野正树; 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: 2015-12-23
Anticipated expiration: 2034-03-18
Also published as: WO2014156817A1; BR112015023734A2; JP5663624B2; CN105190013B; AR095710A1; JP2014190167A; BR112015023734B1

Abstract

This fuel supply device (1) is equipped with a fuel pump (3) and a deaeration hole (27) through which vapors are discharged. In addition, this fuel supply device is equipped with a discharge tube (60), one end part (60a) of which is connected to the deaeration hole (27), thereby enabling vapors to pass through and be discharged from a discharge port (61) at the other end part (60b). The discharge port (61) of the discharge tube (60) is positioned higher than the deaeration hole (27), and a contaminant infiltration prevention means (65) is provided on the other end part (60b) of the discharge tube (60) so as to cover the outer circumferential surface of the other end part (60b) and the discharge port (61). A deaeration discharge path (64) communicating with the interior of the discharge tube (60) via the discharge port (61) is provided between the outer circumferential surface of the other end part (60b) of the discharge tube (60) and the contaminant infiltration prevention means (65).

Description

Fuel supplying device

Technical field

The present invention relates to a kind of fuel supplying device.

The application requires preference based on March 26th, 2013 in No. 2013-063825, the Japan Patent Patent of Japanese publication, and the content of this application is incorporated herein.

Background technique

Generally, as the fuel supply device for vehicle of automatic two-wheeled cycle, four-wheel wagon, more adopt and configure petrolift in fuel tank, fuel supplying device be impregnated in the fuel supplying device that what is called in the fuel in fuel tank is built-in.The petrolift of this fuel supplying device comprises and to be drawn downward by fuel and towards internal-combustion engine (motor) pressure-feed pumping section.In addition, above this pumping section, be provided with the motor part driving pumping section.

Such as in patent documentation 1, describe a kind of petrolift, this petrolift comprises: motor, and shell is located at by this motor; Pumping section, this pumping section is located at shell, and by utilizing motor to make rotating member rotate, fuel is boosted; Suction port, this suction port is located at shell, and for fuel is sucked into pumping section; Exhaust port, this exhaust port is located at shell, and for the fuel after being boosted by pumping section is discharged towards the outside; Vapor exhaust portals, and this vapor exhaust portals and is located at shell, and for the steam produced in pumping section is discharged towards the outside; And suction filter, this suction filter filters the fuel being attracted to pumping section.Be provided with inflow and outflow regulating element in the outside of shell, this inflow and outflow regulating element portals with vapor exhaust and arranges accordingly, allows the steam discharge of portalling from vapor exhaust, and limits foreign matter and invade vapor exhaust and portal.This inflow and outflow regulating element is formed by the filter component comprising porous material, and this porous material allows to portal the passing through of steam of discharging from vapor exhaust, and the passing through of the foreign matter that invades for portalling towards vapor exhaust of restriction.

Prior art document

Patent documentation

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

Summary of the invention

The technical problem that invention will solve

In the petrolift of prior art, when producing eyelet blocking in suction filter, the fuel in fuel tank is sucked in petrolift via exhaust port.But the fuel be sucked in petrolift via exhaust port is not filtered by suction filter, therefore, foreign matter may be contained.When foreign matter 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, also can consider on exhaust port, such as to arrange filter component (filter) to filter the fuel sucked via exhaust port, thus prevent foreign matter to be sucked in petrolift.But, when arranging filter on exhaust port, discharging the resistance during steam when can become usual action, therefore, steam can not be discharged well, may have an impact to the action of petrolift.

The invention provides a kind of fuel supplying device, this fuel supplying device can not be exerted one's influence to the action of petrolift when usual action, when suction filter produces eyelet blocking, foreign matter can be suppressed to invade from exhaust port.

The technological scheme that technical solution problem adopts

According to the first technological scheme of the present invention, fuel supplying device comprises: petrolift, and this petrolift is configured in fuel tank, sucks the fuel in above-mentioned fuel tank via suction filter, and carries towards internal-combustion engine pressure; And exhaust port, the steam produced in above-mentioned petrolift is discharged by this exhaust port.This fuel supplying device comprises discharge tube, one end of this discharge tube is connected with above-mentioned exhaust port, and can discharge with the exhaust port from the other end for the above-mentioned steam flow of discharging from above-mentioned exhaust port, the above-mentioned exhaust port of above-mentioned discharge tube is configured at than above-mentioned exhaust port position by the top, be provided with foreign matter in above-mentioned the other end of above-mentioned discharge tube in the mode of the outer circumferential face covering above-mentioned exhaust port and above-mentioned the other end and invade straining element, above-mentioned outer circumferential face in above-mentioned the other end of above-mentioned discharge tube and above-mentioned foreign matter invade between straining element and are provided with exhaust discharge path, this exhaust discharge path is communicated with via the inside of above-mentioned exhaust port with above-mentioned discharge tube.

According to said structure, the exhaust port of discharge tube is configured at than exhaust port position by the top, therefore, in the fuel that the exhaust port of discharge tube can be suppressed to impregnated in fuel tank.

In addition, foreign matter is set in the mode of the outer circumferential face of the exhaust port and the other end that cover the other end of discharge tube and invades straining element, therefore, even if suppose to suck fuel from the exhaust port of discharge tube because of the eyelet blocking of suction filter, also can make that fuel side is roundabout to be attracted in foreign matter intrusion straining element.By this, path when fuel is sucked by the exhaust port from discharge tube is elongated, therefore, can suppress the intrusion of the foreign matter in fuel.In addition, the foreign matter in the fuel in fuel tank is easily precipitated to below, and near the exhaust port of discharge tube, foreign matter is less.Therefore, even if petrolift for attracting fuel from the exhaust port of discharge tube, also can suppress the intrusion of the foreign matter in fuel because of the eyelet blocking of suction filter further.

In addition, outer circumferential face in the other end of discharge tube and foreign matter invade the exhaust discharge path arranging between straining element and be communicated with the inside of discharge tube, therefore, when not producing eyelet blocking in suction filter, such as when petrolift starts etc., the mode that can invade straining element and do not become resistance with foreign matter discharges steam well, and can not produce fuel priming of pump and hinder.

Therefore, fuel supplying device of the present invention can suppress to suck from exhaust port the fuel being mixed into foreign matter, and reliably can discharge steam from exhaust port.

Second technological scheme of the present invention is on the basis of the fuel supplying device of the present invention first technological scheme, comprises and to support above-mentioned petrolift and to be fixed on the flange unit of above-mentioned fuel tank.Above-mentioned flange unit comprises: lip part, and this lip part is installed on the upper wall of above-mentioned fuel tank; Upper cover, this is covered on above-mentioned lip part, and covers above-mentioned petrolift; And wall portion, this wall portion is located at the radial outside of above-mentioned upper cover, and erects from above-mentioned lip part.It is above-mentioned flange unit that above-mentioned foreign matter invades straining element, above-mentioned the other end of above-mentioned discharge tube is configured between above-mentioned upper cover and above-mentioned wall portion, and covered by above-mentioned lip part, above-mentioned upper cover and above-mentioned wall portion, be provided with above-mentioned exhaust discharge path between the above-mentioned outer circumferential face in above-mentioned the other end and above-mentioned upper cover and above-mentioned wall portion.

According to said structure, the flange unit of the fuel supplying device being installed on the so-called top loaded type of the upper wall of fuel tank is invaded straining element as foreign matter, therefore, invade straining element without the need to arranging foreign matter as another part.Therefore, especially in the fuel supplying device of top loaded type, simply and at low cost can form foreign matter and invade straining element.

3rd technological scheme of the present invention is on the basis of the fuel supplying device of the present invention first technological scheme or the second technological scheme, also can be provided with the porous member that can filter above-mentioned fuel at the above-mentioned outer circumferential face of above-mentioned the other end of above-mentioned discharge tube.

According to said structure, be provided with the porous member that can filter fuel at the outer circumferential face of the other end of discharge tube, therefore, the fuel that can be attracted to discharge tube inside to the eyelet blocking because of suction filter filters.Therefore, can foreign matter be suppressed further to invade.And the exhaust port of discharge tube also can not hinder the discharge function of steam because of exhaust discharge path.Therefore, the fuel supplying device of technical solution of the present invention can reliably suppress to suck from exhaust port the fuel being mixed into foreign matter, and reliably can discharge steam from exhaust port.

4th technological scheme of the present invention is on the basis of the fuel supplying device of arbitrary technological scheme in the present invention first technological scheme to the 3rd technological scheme, and the opening area of above-mentioned discharge tube also can be formed as larger than the opening area of above-mentioned exhaust port.

According to said structure, the opening area of discharge tube is formed larger than the opening area of exhaust port, therefore, even if under the state be full of by fuel in the inside of discharge tube, the steam of discharging from exhaust port also can easily at the internal circulation of discharge tube.Therefore, reliably the steam of discharging from exhaust port can be expelled to outside via discharge tube.

5th technological scheme of the present invention is on the basis of the fuel supplying device of the present invention first technological scheme, it is barrel member that above-mentioned foreign matter invades straining element, this barrel member has the surrounding wall portion of the bottom relative with the above-mentioned exhaust port of above-mentioned the other end and the above-mentioned outer circumferential face around above-mentioned the other end, and be installed on above-mentioned the other end, between the above-mentioned outer circumferential face and the above-mentioned surrounding wall portion of above-mentioned barrel member of above-mentioned the other end, be provided with above-mentioned exhaust discharge path.

According to said structure, form foreign matter by barrel member and invade straining element, and as the component different from discharge tube, therefore, foreign matter can be formed simply and invade straining element.

In addition, by the height of the surrounding wall portion of adjustment barrel component, can regulate the lap of the surrounding wall portion of the outer circumferential face of the other end of discharge tube and barrel member.By this, the length of the exhaust discharge path between the outer circumferential face of the other end of discharge tube and the surrounding wall portion of barrel member can be regulated simply, therefore, the path (being vented discharge path) when the eyelet blocking because of suction filter can be sucked fuel from the exhaust port of discharge tube is set as the length expected.Therefore, the balance that can will be set as expecting based on the discharge function of steam and the intrusion muting function of foreign matter that are vented discharge path.

6th technological scheme of the present invention is on the basis of the fuel supplying device of the present invention the 5th technological scheme, also at least either party the part in the above-mentioned bottom of above-mentioned barrel member and above-mentioned surrounding wall portion can be provided with the porous member that can filter above-mentioned fuel.

According to said structure, porous member is set by least either party the part in the bottom and surrounding wall portion of barrel member, can filters from the fuel that the exhaust port of discharge tube sucks the eyelet blocking because of suction filter.Therefore, can foreign matter be reliably suppressed to invade.And, formed a part for barrel member by porous member, and exhaust discharge path is set between the outer circumferential face and the surrounding wall portion of barrel member of the other end of discharge tube, therefore, also can not hinder the discharge of steam.Therefore, even if fuel supplying device of the present invention is when fuel is sucked in petrolift from exhaust port, also can reliably suppresses foreign matter to invade, and can reliably steam be discharged from exhaust port.

Invention effect

According to above-mentioned fuel supplying device, the exhaust port of discharge tube is configured at than exhaust port position by the top, therefore, in the fuel that the exhaust port of discharge tube can be suppressed to impregnated in fuel tank.

Accompanying drawing explanation

Fig. 1 is the stereogram of the fuel supplying device of the first mode of execution.

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

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

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

Fig. 5 is the stereogram of lid filter.

Fig. 6 is the explanatory drawing of exhaust discharge path.

Fig. 7 is the stereogram of the discharge tube of the variation of the first mode of execution.

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

Fig. 9 is the stereogram of the fuel supplying device of the second mode of execution.

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

Figure 11 is the stereogram of barrel member.

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

Figure 13 is the stereogram of the fuel supplying device of the variation of the second mode of execution.

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

Embodiment

(fuel supplying device of the first mode of execution)

Below, be described with reference to the fuel supplying device of accompanying drawing to the first mode of execution.In addition, in the following description, top and below are equivalent to top and the below of vertical, and the relative position of the axis of petrolift is sometimes also referred to as top and below.

Fig. 1 is the stereogram of the fuel supplying device 1 of the first mode of execution.

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

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

As shown in Figure 1, the fuel supplying device 1 of the first mode of execution is the fuel supplying device 1 of so-called top loaded type, and as shown in Figure 2, it inserts from the opening 2a of the upper wall 2b being formed at fuel tank 2 and is installed on the upper wall 2b of fuel tank 2 and impregnated in fuel.

Fuel supplying device 1 comprises: petrolift 3, and this petrolift 3 is configured in fuel tank 2; Holder portion 4, this holder portion 4 is installed on the upper wall 2b of fuel tank 2 and supports petrolift 3; Suction filter 90, this suction filter 90 is configured at suction side, the i.e. downside of petrolift 3; And discharge tube 60 (with reference to Fig. 3), this discharge tube 60 is communicated with the exhaust port 27 (with reference to Fig. 3) for discharging the steam in petrolift 3.Below, each constituent part of fuel supplying device 1 is described.

(petrolift)

Petrolift 3 is formed as substantial cylindrical shape, has the motor part 30 be configured on the upside of petrolift 3 and the pumping section 40 be configured on the downside of petrolift 3.In addition, below, be described using the axis at the center of petrolift 3 as central shaft O.In addition, below, sometimes by the direction of the central shaft O along petrolift 3 referred to as axis, by the circumference of petrolift 3 referred to as circumference.

(motor part)

In motor part 30, such as, can use the direct current motor 30a of band brush (not shown).Be configured with output shaft 30b in the centre of motor part 30, this output shaft 30b is supported to can freely rotates by the lower side shaft of the upside of motor part 30 and pumping section 40.

The pair of motors terminal (not shown) engaged with brush electricity is provided with in the upside of motor part 30.Pair of motors terminal is connected with wire harness 6, utilizes wire harness 6 to be electrically connected with motor part 30 by external power supply, thus from the electric power of external power supply supply for driving direct current motor 30a.

In addition, outlet cover 8 is provided with in the upside of motor part 30.Outlet cover 8 is provided with the discharge port 31 of being discharged by fuel and the safety check 74 be communicated with this discharge port 31.Discharge port 31 is the positions of being discharged by the fuel drawn by petrolift 3.Safety check 74 is for preventing the fuel adverse current of discharging from discharge port 31.In addition, the stepped part 30c for riveting aftermentioned case body 20 is formed with in the lower, outer perimeter of outlet cover 8.

(pumping section)

Pumping section 40 employs the pump of the non-volume type with impeller 47, and it is by impeller 47 and the pump case 45 that formed in the mode of the entirety covering impeller 47.

Impeller 47 be such as be made up of resin be formed as roughly discoideus component, it is connected with the output shaft 30b of motor part 30 in the mode that can not relatively rotate.Multiple blade part (not shown) is formed at the upper surface of impeller 47 and the outer circumferential side of lower surface.On the wall thickness direction of impeller 47, formation is run through between above-mentioned multiple blade part.In addition, impeller 47 is formed with the fuel flow path hole (not shown) run through along wall thickness direction.When utilizing the driving of direct current motor 30a to make impeller 47 rotate, fuel flows through not shown fuel flow path hole and the side pressure conveying upward from the downside of impeller 47.

Cover the pump case 45 of entirety of impeller 47 by lower shell body 42, upper shell 43, formed by the middle shell 44 that lower shell body 42 and upper shell 43 clamp.Lower shell body 42, upper shell 43 and middle shell 44 are formed by the resin with oil resistance, and are formed by such as using the injection molded of mould etc.

Lower shell body 42 is formed as roughly discoideus in the mode of the bottom covering impeller 47.The groove portion (not shown) that axial top view is substantially C-shaped is formed on the surface by impeller 47 side of lower shell body 42.The fuel flow path hole (not shown) that the wall thickness direction along lower shell body 42 is run through is formed in one end of the radial outside in this groove portion.In addition, fuel suction pipe 41 is provided with in the bottom of lower shell body 42.

Fuel suction pipe 41 is communicated with the not shown fuel flow path hole being formed at lower shell body 42, and by this, fuel is drawn in pumping section 40 by from fuel suction pipe 41.

Fuel suction pipe 41 is communicated with the not shown fuel flow path hole of lower portion with being formed at, this position is corresponding with the one end in groove portion (not shown) of the C-shaped being formed at impeller 47, therefore, the state of the position of the peripheral part being configured at housing 42 is on the lower in.

The stepped part 42a that can install and remove for the square ring 46 of rubber is formed in the lower, outer perimeter of lower shell body 42.

In addition, lower shell body 42 is formed with the not shown through hole that the thickness direction (above-below direction) along lower shell body 42 runs through.This through hole is communicated with exhaust port 27, and this exhaust port 27 runs through the diapire 25b of aftermentioned lower cover 25.By this, the steam produced in pumping section 40 can be expelled to the outside of pumping section 40 via the exhaust port 27 of the through hole of lower shell body 42 and lower cover 25.

Upper shell 43 is the roughly discoideus components with external diameter roughly the same with motor part 30.Be formed with inserting hole 43a at the substantial middle place of upper shell 43, and insert for the output shaft 30b of direct current motor 30a.In addition, the fuel flow path hole (not shown) of lower surface and the upper surface running through upper shell 43 is formed at the outer circumferential side of inserting hole 43a.Fuel flow path hole is communicated with motor part 30, and flows through for the fuel transported from impeller 47 pressure.

Middle shell 44 is components of the roughly ring-type with external diameter roughly the same with motor part 30.

In the inner side of middle shell 44 to make the central shaft of middle shell 44 mode consistent with the central shaft of impeller 47 be configured with impeller 47.The internal diameter of middle shell 44 is slightly larger than the external diameter of impeller 47, between the internal surface 44a (i.e. the internal surface 44a of pump case 45) and the outer circumferential face of impeller 47 of middle shell 44, be formed with gap.

In addition, middle shell 44 is configured between upper shell 43 and lower shell body 42.Herein, the thickness of the axis of middle shell 44 is roughly the same with above-mentioned impeller 47 or slightly thicker than impeller 47.That is, middle shell 44 serves for preventing the upper surface of impeller 47 from contacting and preventing the effect of the partition that the lower surface of impeller 47 contacts with the upper surface of lower shell body 42 with the lower surface of upper shell 43.In addition, between the upper surface and the lower surface of upper shell 43 of impeller 47 and between the lower surface of impeller 47 and the upper surface of lower shell body 42, gap is formed with.

The efficiency of petrolift 3 depends on each gap be formed between pump case 45 and impeller 47.Each gap is set as specified value according to the efficiency of required petrolift 3.

Motor part 30 and pumping section 40 are covered by case body 20.Case body 20 is the roughly cylindric components be made up of iron etc., and it is such as formed by being cut off by weldless tube (seamlesspipe).The upper side end of case body 20 forms caulking part 22, and be riveted on be formed at motor part 30 stepped part 30c on.

In addition, lip part 21 is extended at the downside end of case body 20 towards radially inner side is bending.The diameter of the inner circumference edge of lip part 21 is set to slightly larger than the periphery of the stepped part 42a being formed at lower shell body 42.In addition, utilize the lip part 21 of the bottom surface of stepped part 42a and case body 20 slightly conquassation square ring 46 to be in the state clamped.By this, ensure that the sealing between case body 20 and pumping section 40.

(holder portion)

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

(flange unit)

Flange unit 9 has resinous roughly discoideus lip part 11.Annular wall 13 (being equivalent to " wall portion " in technological scheme) is equipped with downward at the position corresponding with the opening 2a of fuel tank 2 of lip part 11.The annular wall 13 of lip part 11 is inserted into the opening 2a of the upper wall 2b being formed at fuel tank 2 from outside (upside), and is installed on upper wall 2b under the state of the aligned in position of the opening 2a by the outer circumferential face of annular wall 13 and fuel tank 2.By this, the upper surface of flange unit 9 is in the state of the outside of exposing to fuel tank 2.

Flange unit 9 is provided with the fuel take-off pipe 12 be communicated with the discharge port 31 of petrolift 3.That is, fuel is delivered to internal-combustion engine from discharge port 31 via fuel take-off pipe 12 pressure.In addition, brush unit 9 is provided with the pressure regulator 76 be communicated with fuel take-off pipe 12, can to the fuel pressure guaranteeing towards the pressure-feed fuel of internal-combustion engine to specify.

Connector 9a is provided with at the upper surface of flange unit 9.On this connector 9a, interlocking has the aerial lug be connected with external power supply.In addition, connector 9a is electrically connected with the motor part 30 of petrolift 3, by this, and drive motor portion 30.In addition, in the inner surface side of lip part 11, and be formed with recess 14 in the inner side of annular wall 13, recess 14 is fixed with upper cover 10.In addition, the other end 60b (all with reference to Fig. 3) of aftermentioned discharge tube 60 is configured with in the recess 14 between annular wall 13 and upper cover 10.

(upper cover)

Upper cover 10 is the components of the tubular formed by such as resin etc., and it is set as the outer circumferential face covering petrolift 3.In the lower end of upper cover 10, there is opening portion 10a, petrolift 3 can be inserted into opening portion 10a from downside.The perisporium 10b of upper cover 10 extends to the axial substantial middle of petrolift 3 from flange unit 9 till.

As shown in Figure 1, the snap-latch piece 17 extended below axis from the periphery of opening portion 10a is circumferentially equally spaced formed at four positions of upper cover 10.Resiliently deformable can be carried out towards expanding direction in the front end of this snap-latch piece 17.Snap-latch piece 17 extends to pumping section 40 (all with reference to Fig. 2) position slightly on the lower than petrolift 3.Snap-latch piece 17 is formed the card complex hole 19 engaged with the engaging protuberance 18 being formed at lower cover 25.In addition, fasten to carry out the axis of lower cover 25 and the location of circumference by snap-latch piece 17 and aftermentioned lower cover 25.

(lower cover)

The lower cover 25 being configured at the suction side of petrolift 3 is formed as roughly having bottom tube-like.The perisporium 25a of lower cover 25 is set to internal diameter can be fitted together to petrolift 3 and the external diameter degree slightly less than the internal diameter of the perisporium 10b of upper cover 10.

The engaging protuberance 18 that can engage with this card complex hole 19 is formed in the position corresponding with the card complex hole 19 of the snap-latch piece 17 being formed at upper cover 10 of the perisporium 25a of lower cover 25.By the snap-latch piece 17 of upper cover 10 with engage protuberance 18 and fasten, make upper cover 10 and lower cover 25 integration.In addition, above-mentioned upper cover 10 and lower cover 25 supporting fuel pump 3 (with reference to Fig. 2) can be utilized.

The assembly department 26 of not shown liquid level detector is formed in the downside of lower cover 25 and by the position of radial outside.Assembly department 26 is formed as the tabular extended to form towards radial outside, when forming lower cover 25, simultaneously by injection molded type.

In addition, as shown in Figure 2, in the downside of lower cover 25, suction filter 90 is installed.As long as can be required turbidity test by fuel filter, the material of suction filter 90 also can be arbitrary.Such as, the wearing and tearing powder that can filter bearing etc. can be adopted to apply netted, fibrous, the Porous shape of the dust of dysgenic size, granular etc. filter to the action of Fuelinjection nozzle etc.Specifically, as the material of suction filter 90, such as, can use netted nylon cloth.

Suction filter 90 is communicated with fuel suction pipe 41 through filter discharge tube 38.Fuel in fuel tank 2 is directed into the fuel suction pipe 41 of pumping section 40 via suction filter 90 and filter discharge tube 38.Then, fuel flows through the upside being delivered to motor part 30 in pump case 45 by pressure, and is carried to internal-combustion engine (not shown) via fuel take-off pipe 12.

(exhaust port)

As shown in Figure 3, be formed with at the diapire 25b of lower cover 25 exhaust port 27 that through-thickness runs through the diapire 25b of lower cover 25.The steam (vapor) produced in petrolift 3 is expelled to the outside of pumping section 40 by this exhaust port 27.The sectional shape (i.e. the opening shape of exhaust port 27) orthogonal with central shaft O of exhaust port 27 is formed as circular shape.

(discharge tube)

Fuel supplying device 1 comprises discharge tube 60.The end 60a being configured at below of discharge tube 60 is connected with exhaust port 27, and it can make the steam flow of discharging from exhaust port 27 to discharge from the exhaust port 61 of the other end 60b being configured at top.Discharge tube 60 is formed by discharge tube main part 62 and lid filter 63.

Discharge tube main part 62 in the bottom 25b and perisporium 25a of lower cover 25 to comprise the cross-section of central shaft O time be formed as roughly L-shaped shape.

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

In addition, the region corresponding with the perisporium 10b of upper cover 10 in discharge tube main part 62 is set as the distance being separated more than the thickness of the perisporium 10b of upper cover 10 from the outer circumferential face of petrolift 3.By this, when upper cover 10 and lower cover 25 being engaged, between the outer circumferential face and discharge tube main part 62 of petrolift 3, be configured with the perisporium 10b of upper cover 10.Therefore, upper cover 10 and lower cover 25 reliably engage to keep petrolift 3 by the mode can not interfered with the perisporium 10b of upper cover 10 and discharge tube main part 62.

Fig. 4 is the sectional view of the C-C line along Fig. 1.As shown in Figure 4, to be formed as width in the circumferential larger for discharge tube main part 62.The sectional shape (i.e. the opening shape of discharge tube main part 62) orthogonal with central shaft O of discharge tube main part 62 is formed as roughly fan shape.It is enough large that the opening area of discharge tube main part 62 is set to compared with the opening area of the exhaust port 27 of the opening shape with circular shape.By this, even if under the state be full of by fuel in the inside of discharge tube 60, from the steam also easy internal circulation at discharge tube 60 that exhaust port 27 is discharged.

As shown in Figure 3, above discharge tube main part 62, cylindrical part 62a is provided with.Lid filter 63 is coated at this cylindrical part 62a.

Fig. 5 is the stereogram of lid filter 63.Lid filter 63 is radially excised by a part of the outer circumferential face 63c by the cylindrical body formed by such as resin etc. and arranges window portion 63d and setting example such as netted nylon cloth etc. can the porous member 63e of filtering fuel be formed on this window portion 63d.Be set to compared with the opening area of exhaust port 27 be enough large from opening area during end on observation lid filter 63.

As shown in Figure 3, the upper end portion 63a of lid filter 63 is equivalent to the other end 60b of discharge tube 60.In addition, the opening of the upper end portion 63a of lid filter 63 is equivalent to the exhaust port 61 of discharge tube 60.

The internal diameter of lid filter 63 is set to slightly less than the external diameter of the cylindrical part 62a of discharge tube main part 62.By this, the underpart 63b of lid filter 63 can be coated at the cylindrical part 62a of discharge tube main part 62, and lid filter 63 can be fixed on the cylindrical part 62a of discharge tube main part 62.

The other end 60b (being the upper end portion 63a of lid filter 63 in the present embodiment) of discharge tube 60 is configured in the recess 14 between upper cover 10 and annular wall 13.In addition, the other end 60b of discharge tube 60 is covered by lip part 11, upper cover 10 and annular wall 13, and exhaust port 61 is configured at than exhaust port 27 position by the top and is configured near lip part 11.Like this, flange unit 9 forms by the exhaust port 61 utilizing lip part 11, upper cover 10 and annular wall 13 and cover discharge tube 60 foreign matter suppressing the foreign matter in fuel to enter in petrolift 3 and invades straining element 65.Later the effect of foreign matter intrusion straining element 65 is described.

In addition, between the outer circumferential face of the other end 60b of discharge tube 60 and upper cover 10 and annular wall 13, gap is formed with.This gap forms the exhaust discharge path 64 be communicated with the inside of discharge tube 60 via the exhaust port 61 of discharge tube 60.Therefore, the steam of discharging from exhaust port 27 can be expelled to the outside of fuel supplying device 1 via discharge tube 60, exhaust port 61 and exhaust discharge path 64.

(effect of the fuel supplying device of the first mode of execution)

Then, the effect of the fuel supplying device 1 of the first mode of execution is described.

As shown in Figure 2, when the motor part 30 of driving fuel pump 3, output shaft 30b rotates, and rotates with the impeller 47 that the mode can not carrying out relatively rotating is connected with this output shaft 30b.Rotated by impeller 47 and produce vortex flow between impeller 47 and pump case 45.

Pumping section 40 utilizes this vortex flow that fuel is boosted.In addition, the fuel of pumping section 40 in fuel tank 2 be filtered by suction filter 90 after state under suck fuel through filter discharge tube 38 from fuel suction pipe 41.

Fig. 6 is the explanatory drawing of exhaust discharge path 64.In addition, the liquid level S1 of the fuel when dot and dash line in Fig. 6 represents the state that fuel is fully full of under (or state close with this state), the double dot dash line in Fig. 6 represent consume prescribed quantity of fuel and be in than annular wall 13 lower end edge portion on the lower time the liquid level S2 of fuel.In addition, the arrow V in Fig. 6 represents the circulation of steam, 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 exhaust port 27 together with the fuel after boosting.In addition, as shown in Figure 6, the steam of discharging from exhaust port 27 (with reference to Fig. 3) is expelled to the outside of fuel supplying device 1 via the exhaust discharge path 64 between the outer circumferential face of the other end 60b of discharge tube 60 and upper cover 10 and annular wall 13.Now, exhaust discharge path 64 is communicated with via the inside of exhaust port 61 with discharge tube 60, and therefore, the mode not becoming obstruction with foreign matter intrusion straining element 65, lid filter 63 etc. discharges steam well.

In addition, as shown in Figure 3, when fuel supplying device 1 carries out action, when supposing to produce eyelet blocking in suction filter 90, fuel supplying device 1 acts on attraction force via exhaust port 27 from the exhaust port 61 of the other end 60b of discharge tube 60 in petrolift 3.

But in the fuel supplying device of prior art, exhaust port is located at the surface of the below of petrolift.Therefore, to impregnated in the state of the fuel in fuel tank elongated for the exhaust port of the fuel supplying device of prior art.Therefore, the foreign matter in fuel may not to be sucked in petrolift via exhaust port by the mode that suction filter filters together with fuel.

On the other hand, the exhaust port 61 of the discharge tube 60 of the fuel supplying device 1 of present embodiment is configured at than exhaust port 27 position by the top, and is configured near lip part 11.Therefore, the exhaust port 61 of the fuel supplying device 1 of present embodiment is inhibit to impregnated in fuel in fuel tank 2.In addition, the foreign matter in fuel is easily precipitated to the below of fuel tank 2 because of gravity, and near the exhaust port 61 of discharge tube 60, foreign matter is less.Therefore, inhibit the foreign matter in fuel via be configured at top discharge tube 60 exhaust port 61 and be attracted in petrolift 3.

Herein, such as, when being filled with the state (state of the liquid level S1 of Fig. 6) of enough fuel and producing eyelet blocking in fuel tank 2 in suction filter 90, fuel is attracted.But, the exhaust port 61 of discharge tube 60 is covered by lip part 11, upper cover 10, annular wall 13, therefore, fuel is roundabout in lip part 11, upper cover 10 and annular wall 13, and is attracted by the porous member 63e being located at lid filter 63 (the arrow F with reference in Fig. 6).By this, path when fuel is sucked by the exhaust port 61 from discharge tube 60 is elongated, and utilizes porous member 63e filtering fuel, therefore, the foreign matter in fuel can be suppressed to invade.That is, flange unit 9 forms by the exhaust port 61 utilizing lip part 11, upper cover 10 and annular wall 13 and cover discharge tube 60 foreign matter suppressing the foreign matter in fuel to enter in petrolift 3 and invades straining element 65.

In addition, fuel such as in the fuel tank 2 consuming established amount and under the state (state of the liquid level S2 of Fig. 6) causing the liquid level of fuel to be positioned at than the lower end edge portion position on the lower of annular wall 13, exhaust discharge portion 64 not by the liquid level S2 of fuel (with reference to Fig. 6) blocking, and is in the state that the air in fuel tank 2 easily circulates.Therefore, when suction filter 90 produces eyelet blocking, the air in fuel tank 2 is attracted under the state (state of the liquid level S2 of Fig. 6) that the liquid level of fuel is arranged in than the lower end edge portion position on the lower of annular wall 13.By this, air is mixed in the fuel supplied when engine start, and therefore, user can detect the eyelet blocking of suction filter 90 early according to performance during engine start.

(effect of the first mode of execution)

According to the present embodiment, the exhaust port 61 of discharge tube 60 is configured at than exhaust port position by the top, therefore, the exhaust port 61 of discharge tube 60 can be suppressed to impregnated in the fuel in fuel tank 2.

In addition, foreign matter is set in the mode of the outer circumferential face of the exhaust port 61 and the other end 60b that cover the other end 60b of discharge tube 60 and invades straining element 65, therefore, even if suppose for attracting fuel from the exhaust port 61 of discharge tube 60 because of the eyelet blocking of suction filter 90, fuel also roundabout can invade straining element 65 in foreign matter on one side, is attracted by porous member 63e.By this, path when fuel is sucked by the exhaust port 61 from discharge tube 60 is elongated, and utilizes porous member 63e filtering fuel, therefore, the foreign matter in fuel can be suppressed to invade.In addition, the foreign matter in the fuel in fuel tank 2 is easily precipitated to below, and near the exhaust port 61 of discharge tube 60, foreign matter is less.Therefore, even if petrolift 3 for attracting fuel from the exhaust port 61 of discharge tube 60, also can suppress the intrusion of the foreign matter in fuel because of the eyelet blocking of suction filter 90 further.

In addition, invade with foreign matter the exhaust discharge path 64 arranging between straining element 65 and be communicated with the inside of discharge tube 60 at the outer circumferential face of the other end 60b of discharge tube 60, therefore, when not producing eyelet blocking in suction filter 90, such as when petrolift 3 starts etc., the mode that can invade straining element 65 and do not become resistance with foreign matter discharges steam well, and can not produce the starting of petrolift 3 and hinder.

Therefore, the fuel supplying device 1 of present embodiment can suppress to suck from exhaust port 27 fuel being mixed into foreign matter, and reliably can discharge steam from exhaust port 27.

In addition, the flange unit 9 being installed on the fuel supplying device 1 of the so-called top loaded type of the upper wall 2b of fuel tank 2 is invaded straining element 65 as foreign matter, therefore, invade straining element 65 without the need to arranging foreign matter as another part.Therefore, especially in the fuel supplying device 1 of top loaded type, simply and at low cost can form foreign matter and invade straining element 65.

In addition, porous member 63e is set in a part for the outer circumferential face of the other end 60b of discharge tube 60, therefore, can blocks the eyelet because of suction filter 90 and a part of fuel be attracted in discharge tube 60 filters.Therefore, can foreign matter be suppressed further to invade.And the exhaust port 61 of discharge tube 60 also can not hinder the discharge function of steam because of porous member 63e.Therefore, even if the fuel supplying device of present embodiment 1 is when fuel is sucked in petrolift 3 from exhaust port 27, also can reliably suppress foreign matter to invade, and can reliably steam be discharged from exhaust port 27.

In addition, the opening area of discharge tube 60 is formed larger than the opening area of exhaust port 27, therefore, even if under the state be full of by fuel in the inside of discharge tube 60, the steam of discharging from exhaust port 27 also can easily at the internal circulation of discharge tube 60.Therefore, reliably the steam of discharging from exhaust port 27 can be expelled to outside via discharge tube 60.

(variation of the first mode of execution)

Fig. 7 is the stereogram of the discharge tube 60 of the variation of the first mode of execution, and Fig. 8 is the sectional view of the D-D line along Fig. 7.In addition, in Fig. 7 and Fig. 8, only illustrate discharge tube 60 in order to easy understand, and eliminate the diagram of other parts rightly.In addition, in fig. 8, exhaust port 27 is illustrated with double dot dash line.

The discharge tube main part 62 of the discharge tube 60 of the first mode of execution is formed as width comparatively large (with reference to Fig. 4) in the circumferential.

On the other hand, as shown in Figure 7, the discharge tube 60 of the variation of the first mode of execution is formed as different from the first mode of execution on this aspect cylindric at discharge tube main part 62.In addition, omit the detailed description of the component part identical with the first mode of execution, and only different parts is described.

As shown in Figure 7, the outward appearance of the discharge tube 60 of the variation of the first mode of execution is formed as roughly L-shaped shape.As shown in Figure 8, the opening area of an end 60a of discharge tube 60 is set to larger than the opening area of exhaust port 27.In addition, the opening area of discharge tube main part 62 is set to the opening area compared with an end 60a of discharge tube 60 is enough large.By this, even if under the state be full of by fuel in the inside of discharge tube 60, from the steam also easy internal circulation at discharge tube 60 that exhaust port 27 is discharged.

The shape of discharge tube 60 is not limited to the variation of the first mode of execution and the first mode of execution, can carry out various change.

(the second mode of execution)

Fig. 9 is the stereogram of the fuel supplying device 100 of the second mode of execution.

Then, the fuel supplying device 100 of the second mode of execution is described.

The fuel supplying device 1 of the first mode of execution is the fuel supplying device 1 of the so-called top loaded type of the upper wall 2b being installed on fuel tank 2, forms foreign matter invade straining element 65 by flange unit 9.

On the other hand, the fuel supplying device 100 of the second mode of execution at the fuel supplying device 100 of so-called underneath type being the lower wall (not shown) being installed on fuel tank, and forms foreign matter by barrel member 163 and invades on this aspect of straining element 165 different from the first mode of execution.In addition, omit the detailed description of the component part identical with the first mode of execution, and only different parts is described.

Fuel supplying device 100 shown in Fig. 9 comprises: petrolift 3, and this petrolift 3 is configured in fuel tank; Holder portion 4, this holder portion 4 is installed on the lower wall of fuel tank and supports petrolift 3; And discharge tube 160, this discharge tube 160 is communicated with the exhaust port 27 for discharging the steam in petrolift 3.Below, each constituent part of fuel supplying device 100 is described.

Petrolift 3 is formed as substantial cylindrical shape, has the motor part 30 be configured on the upside of petrolift 3 and the pumping section 40 be configured on the downside of petrolift 3.

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

(flange unit)

Annular wall 13 is equipped with upward at the position corresponding with the opening (not shown) of the lower wall of fuel tank of the lip part 11 of flange unit 9.Annular wall 13 is inserted into the opening portion of the lower wall being formed at fuel tank by lip part 11 from outside (downside), and is installed on the lower wall of fuel tank under the state of the aligned in position of the outer circumferential face of annular wall 13 and the opening of fuel tank.Therefore, the lower surface of flange unit 9 is in the state of the outside of exposing to fuel tank.

Flange unit 9 is provided with fuel take-off pipe 12, and to carry towards internal-combustion engine pressure via fuel take-off pipe 12, wherein, above-mentioned fuel take-off pipe 12 is communicated with the discharge port 31 of the upside being located at petrolift 3.In addition, be provided with the pressure regulator 76 be communicated with fuel take-off pipe 12 in the upside of the discharge port 31 of petrolift 3, can to the fuel pressure guaranteeing towards the pressure-feed fuel of internal-combustion engine to specify.

Be provided with connector 9a at the lower surface of flange unit 9, be electrically connected with drive motor portion 30 with the motor part 30 of petrolift 3.

Suction filter 90 is accommodated with in the inside of flange unit 9.Suction filter 90 is connected with the fuel suction pipe 41 of pumping section 40.Fuel in fuel tank is drawn by pumping section 40 after being filtered flowing through suction filter 90.

(lower cover)

Lower cover 125 is the components of the tubular formed by such as resin etc., and it is set as the outer circumferential face of the bottom covering petrolift 3.In the upper end of lower cover 125, there is opening portion 125a, petrolift 3 can be inserted into opening portion 125a from upside.

(upper cover)

Upper cover 110 is configured to cover petrolift 3 from upside, and is formed as roughly having bottom tube-like.The assembly department 26 of not shown liquid level detector is formed in the upside of upper cover 110 and by the position of radial outside.

Expanding wide diameter portion 111 is formed because of step 111a in the bottom of upper cover 110.Be provided with such as not shown engagement pawl at the outer circumferential face of wide diameter portion 111, can engage with lower cover 125.

In addition, the through hole 111b run through along the vertical direction is provided with at the step 111a of wide diameter portion 111.Aftermentioned discharge tube 160 inserts 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 upper cover 110.The snap portions of limiting member 135 pairs of upper covers 110 and lower cover 125 limits towards the displacement of radial outside.By this, upper cover 110 is inhibit to be removed with the engaging of lower cover 125.

(discharge tube)

Fuel supplying device 100 comprises discharge tube 160.Discharge tube 160 is the components of the tubulose formed by metals such as such as iron, is bent to such as roughly L-shaped when side-looking is observed.Discharge tube 160 and upper cover 110 split are formed.

The end 160a being configured at below of discharge tube 160 is connected with the exhaust port 27 of the below of pumping section 40, and it can make the steam flow of discharging from exhaust port 27 to discharge from the exhaust port 161 (with reference to Figure 10) of the other end 160b being configured at top.

Discharge tube main part 162 is to extend upward along the mode of central shaft O.The sectional shape orthogonal with central shaft O of discharge tube main part 162 is formed as such as circular shape.Be set to compared with the opening area of exhaust port 27 identical with the first mode of execution of the opening area of discharge tube main part 162 is enough large.

(foreign matter intrusion straining element)

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

As shown in Figure 10, be provided with foreign matter at the other end 160b of discharge tube 160 in the mode covering exhaust port 161 and invade straining element 165 i.e. barrel member 163.When barrel member 163 is the side-looking observations formed by such as metal etc., cross section is the component of roughly hat-shaped, and it has the surrounding wall portion 163c of the bottom 163a relative with the exhaust port 161 of the other end 160b of discharge tube 160 and the outer circumferential face around the other end 160b of discharge tube 160.

Figure 11 is the stereogram of barrel member 163.

As shown in figure 11, a part of surrounding wall portion 163c radially excises to arrange window portion 163d by barrel member 163, and arranges the porous member 163e of the such as netted nylon cloth for blocking this window portion 163d etc.

As shown in Figure 10, the internal diameter of barrel member 163 is set to compared with the external diameter of discharge tube 160 is enough large.By this, between the outer circumferential face and the surrounding wall portion 163c of barrel member 163 of the other end 160b of discharge tube 160, be formed with gap, arrange for exhaust discharge path 164.

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

As shown in figure 12, be formed towards the outstanding embedding part 163f of radially inner side at the opening of the underpart 163b of barrel member 163.Embedding part 163f is formed at three positions with roughly 120 ° of spacing in the circumference of such as barrel member 163.Be sized to less than the radius of the outer circumferential face of discharge tube 160 to each embedding part 163f from the center of barrel member 163.By this, the underpart 163b of barrel member 163 utilizes each embedding part 163f to be coated at the outer circumferential face of the other end 160b of discharge tube 160.Exhaust discharge path 164 is formed between each embedding part 163f.Each exhaust discharge path 164 is directly communicated with the inside of discharge tube 160 via exhaust port 161 (with reference to Figure 10).

Herein, as shown in Figure 10, degree is suppressed to set the height (length of the above-below direction of the surrounding wall portion 163c namely in Figure 10) of the surrounding wall portion 163c of barrel member 163 rightly according to the intrusion of required foreign matter.Specifically, by regulating the height of surrounding wall portion 163c, can regulate the lap α of the surrounding wall portion 163c of the outer circumferential face of the other end 160b of discharge tube 160 and barrel member 163, and can regulate the length of the exhaust discharge path 164 between the outer circumferential face of the other end 160b of discharge tube 160 and the surrounding wall portion 163c of barrel member 163.In addition, by increasing the height of surrounding wall portion 163c, and increasing the lap α of the outer circumferential face of the other end 160b of discharge tube 160 and the surrounding wall portion 163c of barrel member 163, the length of exhaust discharge path 164 can be increased, and suppress the intrusion of foreign matter.This lap α is set rightly according to the exhaust discharge function of steam of discharge path 164 and the balance of the intrusion muting function of foreign matter.

(effect of the fuel supplying device of the second mode of execution)

Then, the effect of the fuel supplying device 100 of the second mode of execution is described.

As shown in Figure 9, the steam in pumping section 40 is discharged from exhaust port 27 together with the fuel after boosting.In addition, as shown in Figure 10, the steam of discharging from exhaust port 27 (with reference to Fig. 9) is expelled to the outside of fuel supplying device 100 (with reference to Fig. 9) via each exhaust discharge path 164 between the outer circumferential face of the other end 160b of discharge tube 160 and the surrounding wall portion 163c of barrel member 163.Now, each exhaust discharge path 164 is directly communicated with via the inside of exhaust port 161 with discharge tube 160, and therefore, foreign matter intrusion straining element 165 i.e. barrel member 163, the porous member 163e etc. of surrounding wall portion 163c being located at barrel member 163 can not become obstruction.Therefore, steam is expelled to the outside of fuel supplying device 100 (with reference to Fig. 9) well.

In addition, as shown in Figure 9, when fuel supplying device 100 carries out action, when supposing to produce eyelet blocking in suction filter 90, fuel supplying device 100 is sucked in petrolift 3 from the exhaust port 161 (with reference to Figure 10) of the other end 160b of discharge tube 160 via exhaust port 27.Herein, the exhaust port 161 of the discharge tube 160 of the fuel supplying device 100 of the second mode of execution is positioned at than exhaust port 27 position by the top, and is configured at pressure regulator 76 position by the top than the bottom of upper cover 110.Therefore, identical with the first mode of execution, inhibit the exhaust port 161 of the fuel supplying device 100 of the second mode of execution to impregnated in fuel in fuel tank.In addition, the foreign matter in fuel is in because of gravity towards the tendency that the below of fuel tank is precipitated.Therefore, the foreign matter in fuel is inhibit to be attracted in petrolift 3 via the exhaust port 161 of discharge tube 160.

In addition, although be extremely rare situation, such as, under the state that the fuel in fuel tank is sufficiently filled with, the other end 160b of discharge tube 160 impregnated in fuel, and when producing eyelet blocking in suction filter 90, fuel is sucked by the exhaust port 161 from discharge tube 160.

But, as shown in Figure 10, the exhaust port 161 of discharge tube 160 is invaded the straining element 165 i.e. bottom 163a of barrel member 163 and surrounding wall portion 163c by foreign matter and covers, therefore, the fuel roundabout bottom 163a in barrel member 163 and surrounding wall portion 163c, and be attracted by each exhaust discharge path 164.By this, path when fuel is sucked by the exhaust port 161 from discharge tube 160 is elongated, therefore, inhibits the intrusion of the foreign matter in fuel.

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

(effect of the second mode of execution)

According to the fuel supplying device 100 of the second mode of execution, form foreign matter by barrel member 163 and invade straining element 165, and as the component different from discharge tube 160, therefore, foreign matter can be formed simply and invade straining element 165.

In addition, by the height of the surrounding wall portion 163c of adjustment barrel component 163, the lap α of the outer circumferential face of the other end 160b of discharge tube 160 and the surrounding wall portion 163c of barrel member 163 can be regulated.By this, the length of the exhaust discharge path 164 between the outer circumferential face of the other end 160b of discharge tube 160 and the surrounding wall portion 163c of barrel member 163 can be regulated simply, therefore, the path (exhaust discharge path 164) when the eyelet blocking because of suction filter 90 can be sucked fuel from the exhaust port 161 of discharge tube 160 is set as the length expected.Therefore, the balance that can will be set as expecting based on the discharge function of steam and the intrusion muting function of foreign matter that are vented discharge path 164.

In addition, porous member 163e is set by a part of the surrounding wall portion 163c at barrel member 163, can filters from the fuel that the exhaust port 161 of discharge tube 160 sucks the eyelet blocking because of suction filter 90.Therefore, can foreign matter be reliably suppressed to invade.And, in a part for barrel member 163, porous member 163e is set, arrange between the outer circumferential face and the surrounding wall portion 163c of barrel member 163 of the other end 160b of discharge tube 160 and be vented discharge path 164, therefore, also can not hinder the discharge function of steam because of porous member 163e.Therefore, even if the fuel supplying device 100 of the second mode of execution is when fuel is sucked in petrolift 3 from exhaust port 27, also can reliably suppress foreign matter to invade, and can reliably steam be discharged from exhaust port 27.

(fuel supplying device of the variation of the second mode of execution)

Figure 13 is the stereogram of the fuel supplying device 100 of the variation of the second mode of execution.

The fuel supplying device 1 of the first mode of execution is the fuel supplying device 1 of so-called top loaded type, and the foreign matter formed by flange unit 9 invades the outside (with reference to Fig. 6) that straining element 65 is formed at upper cover 10.

The fuel supplying device 100 of the second mode of execution is the fuel supplying device 100 of so-called underneath type, and foreign matter invades the outside (with reference to Fig. 9) that straining element 165 i.e. barrel member 163 is formed at upper cover 110.

On the other hand, as shown in figure 13, the fuel supplying device 200 of the variation of the second mode of execution is provided with discharge tube 260 and lid filter 263 in upper cover 210, and foreign matter invades the inner side that straining element 265 is formed at upper cover 210, and this point is different from the first mode of execution and the second mode of execution.In addition, omit the detailed description of the component part identical with the first mode of execution and the second mode of execution, and only different parts is described.

Discharge tube 260 is connected with the exhaust port 27 of the below of pumping section 40, and to extend upward along the mode of central shaft O.Lid filter 263 is coated at the front end of discharge tube 260.In addition, lid filter 263 is identical with the lid filter 63 (with reference to Fig. 5) of the first mode of execution, therefore, omits the description.

Figure 14 is the sectional view of the G-G line along Figure 13.In addition, the liquid level S1 of the fuel when dot and dash line in Figure 14 represents the state that fuel is fully full of under (or state close with this state), the double dot dash line in Figure 14 represents the liquid level S2 of fuel when consuming prescribed quantity of fuel.In addition, the arrow V in Figure 14 represents the circulation of steam, the circulation of fuel when arrow F represents trunkful.

As shown in figure 14, upper cover 210 comprises the cylindrical portion 212 of front end from outer side covers discharge tube 260 and lid filter 263.Stepped part 215 is provided with in the inside of cylindrical portion 212.The lower end surface 215a of stepped part 215 is configured at such as than the porous member 263e position more on the lower of lid filter 263.The external diameter that the internal diameter of cylindrical portion 212 is configured to compared with discharge tube 260 and lid filter 263 is enough large.By this, between the outer circumferential face and the inner peripheral surface of barrel member 212 of discharge tube 260 and lid filter 263, be formed with gap, arrange for exhaust discharge path 264.The cylindrical portion 212 of upper cover 210 forms by covering the exhaust port 261 of discharge tube 260 the foreign matter intrusion straining element 265 suppressing the foreign matter in fuel to enter petrolift 3 (with reference to Figure 13).

(effect of the fuel supplying device of the variation of the second mode of execution)

Steam in pumping section 40 (with reference to Figure 13) is discharged from exhaust port 27 (with reference to Figure 13) together with the fuel after boosting.Then, the steam of discharging from exhaust port 27 is expelled to the outside of fuel supplying device 200 via upper cover 210 by the outer circumferential face of the upper end portion of discharge tube 260 and the exhaust discharge path 264 between the outer circumferential face of lid filter 263 and the inner peripheral surface of cylindrical portion 212.

In addition, as shown in figure 13, when fuel supplying device 200 carries out action, when supposing to produce eyelet blocking in suction filter 90, fuel supplying device 200 acts on attraction force via exhaust port 27 from the exhaust port 261 (with reference to Figure 14) of the other end of discharge tube 260 in petrolift 3.Herein, as shown in figure 14, such as, when being filled with the state (state of the liquid level S1 of Figure 14) of enough fuel and producing eyelet blocking in fuel tank in suction filter 90 (with reference to Figure 13), fuel is attracted.But the exhaust port 261 of discharge tube 260 is covered by cylindrical portion 212.Therefore, the outer circumferential face of the roundabout upper end portion in discharge tube 260 of fuel side and between the outer circumferential face of lid filter 263 and the inner peripheral surface of cylindrical portion 212, is attracted via the porous member 263e being located at lid filter 263 (the arrow F with reference to Figure 14).By this, path when fuel is sucked from discharge tube 260 is elongated, and utilizes porous member 263e filtering fuel, therefore, the foreign matter in fuel can be suppressed to invade.That is, cylindrical portion 212 foreign matter that the foreign matter in formation suppression fuel enters in petrolift 3 (with reference to Fig. 3) by covering the exhaust port 261 of discharge tube 260 of upper cover 210 invades straining element 265.

In addition, at the fuel such as consumed in the fuel tank of established amount and under the liquid level of fuel is arranged in the state (state of the liquid level S2 of Figure 14) of the lower end surface 215a position on the lower than stepped part 215, the air in cylindrical portion 212 is in the state of easily circulation.Therefore, under the state (state of the liquid level S2 of Figure 14) that the liquid level of fuel is arranged in than the lower end surface 215a position on the lower of stepped part 215 and when suction filter 90 (with reference to Figure 13) produce eyelet block, the air in cylindrical portion 212 is attracted.By this, air is mixed in the fuel supplied when engine start, and therefore, user can detect the eyelet blocking of suction filter 90 early according to performance during engine start.

In addition, technical scope of the present invention is not limited to above-mentioned mode of execution, also can carry out various change not departing from the scope of the inventive concept.

It is flange unit 9 that the foreign matter of the first mode of execution invades straining element 65, it is barrel members 163 that the foreign matter of the second mode of execution invades straining element 165, but the shape that foreign matter invades straining element 65,165 is not limited to the first mode of execution and the second mode of execution, can carry out various change.

The foreign matter that also foreign matter of the first mode of execution can be invaded straining element 65 and the second mode of execution invades straining element 165 and combines.Namely, in the fuel supplying device 1 of top loaded type, the exhaust port 61 that the lip part 11 of flange unit 9, upper cover 10 and annular wall 13 also can be utilized to cover discharge tube 60 invades straining element 65 to arrange the first foreign matter, and cylindrical part 62a barrel member 163 being coated at the top of discharge tube main part 62 invades straining element 165 to arrange the second foreign matter.

The fuel supplying device 1 of the first mode of execution comprises the lid filter 63 being provided with porous member 63e in the upper end of discharge tube 60, but also can not lid filter 63.But, by comprising lid filter 63, even if the fuel of hypothesis in fuel tank 2 is inhaled into via exhaust discharge path 64 and discharge tube 60, also can filter a part of fuel sucked by porous member 63e.Therefore, on this aspect of suction that can suppress the foreign matter in fuel further, present embodiment has superiority.

The suction filter 90 of the fuel supplying device 1 of the first mode of execution is configured at the downside of lower cover 25.In addition, the suction filter 90 of the fuel supplying device 100 of the second mode of execution is configured at the inside of flange unit 9.On the other hand, also the foreign matter of each mode of execution intrusion straining element 65,165 can be applied to the filter unit comprising such as suction filter to be located in the fuel supplying device of so-called external filter type of the outside of fuel tank.

In this second embodiment, porous member 163e is provided with in a part of the surrounding wall portion 163c of barrel member 163.On the other hand, both only porous member 163e can be set in a part of the bottom 163a of such as barrel member 163, also porous member 163e can be set in a part of a part of the surrounding wall portion 163c of barrel member 163 and bottom 163a.In addition, also following structure can be adopted: utilize barrel member 163 cover the exhaust port 161 of discharge tube 160 and form exhaust discharge path 164 in the mode of part porous member 163e not being located at barrel member 163.

Industrial utilizability

Therefore, above-mentioned fuel supplying device can suppress to suck from exhaust port the fuel being mixed into foreign matter, and reliably can discharge steam from exhaust port.

(symbol description)

1,100,200 fuel supplying devices

2 fuel tanks

3 petrolifts

9 flange unit

10,110,210 upper covers

11 lip parts

13 annular wall (wall portion)

27 exhaust ports

60,160 discharge tubes

60a, 160a mono-end

60b, 160b the other end

61,161,261 exhaust ports

63e, 163e, 263e porous member

64,164,264 exhaust discharge paths

65,165,265 foreign matters invade straining element

90 suction filters

163 barrel members

Bottom 163a

163c surrounding wall portion

Claims

1. a fuel supplying device, comprising:

Petrolift, this petrolift is configured in fuel tank, sucks the fuel in described fuel tank via suction filter, and carries towards internal-combustion engine pressure; And

Exhaust port, the steam produced in described petrolift is discharged by this exhaust port,

It is characterized in that,

Comprise discharge tube, an end of this discharge tube is connected with described exhaust port, and can discharge with the exhaust port from the other end for the described steam flow of discharging from described exhaust port,

The described exhaust port of described discharge tube is configured at than described exhaust port position by the top,

Be provided with foreign matter in described the other end of described discharge tube in the mode of the outer circumferential face covering described exhaust port and described the other end and invade straining element,

Described outer circumferential face in described the other end of described discharge tube and described foreign matter invade between straining element and are provided with exhaust discharge path, and this exhaust discharge path is communicated with via the inside of described exhaust port with described discharge tube.

2. fuel supplying device as claimed in claim 1, is characterized in that,

Comprise and described petrolift supported and is fixed on the flange unit of described fuel tank,

Described flange unit comprises:

Lip part, this lip part is installed on the upper wall of described fuel tank;

Upper cover, this is covered on described lip part, and covers described petrolift; And

Wall portion, this wall portion is located at the radial outside of described upper cover, and erects from described lip part,

It is described flange unit that described foreign matter invades straining element,

Described the other end of described discharge tube is configured between described upper cover and described wall portion, and is covered by described lip part, described upper cover and described wall portion,

Described exhaust discharge path is provided with between described outer circumferential face in described the other end and described upper cover and described wall portion.

3. fuel supplying device as claimed in claim 1, is characterized in that,

The porous member that can filter described fuel is provided with at the described outer circumferential face of described the other end of described discharge tube.

4. fuel supplying device as claimed in claim 2, is characterized in that,

5. fuel supplying device as claimed in claim 1, is characterized in that,

The opening area of described discharge tube is formed as larger than the opening area of described exhaust port.

6. fuel supplying device as claimed in claim 2, is characterized in that,

7. fuel supplying device as claimed in claim 3, is characterized in that,

8. fuel supplying device as claimed in claim 4, is characterized in that,

9. fuel supplying device as claimed in claim 1, is characterized in that,

It is barrel member that described foreign matter invades straining element, and this barrel member has the surrounding wall portion of the bottom relative with the described exhaust port of described the other end and the described outer circumferential face around described the other end, and is installed on described the other end,

Described exhaust discharge path is provided with between the described outer circumferential face and the described surrounding wall portion of described barrel member of described the other end.

10. fuel supplying device as claimed in claim 9, is characterized in that,

At least either party a part in the described bottom and described surrounding wall portion of described barrel member is provided with the porous member that can filter described fuel.