CN1434201A - Electromagnetic pump device in fuel feeder of double-wheel vehicle - Google Patents

Abstract

The invention provides an electromagnetic pump apparatus which can utilize a fuel tank for a conventional fuel supply apparatus with a carburetor, and which has an excellent property in piping and is suitable for a two-wheeled vehicle, structuring such that a pump body is provided with an insertion tube portion extending upward and a mounting flange portion formed in a side of the insertion tube portion, a housing of a solenoid portion provided with a fixed core, a movable core and a coil wound with an electromagnetic coil is mounted to the mounting flange portion, a pump portion constituted of a plunger driven by the solenoid portion, a suction side check valve and a discharge side check valve is provided within the pump body, a suction passage with the suction side check valve being arranged thereto is open to an upper end portion of the insertion tube portion via a pump suction passage, and the insertion tube portion is inserted into the insertion hole of the fuel tank and is fastened to an insertion hole tube portion by a first fastening band, whereby the pump suction passage is open within the fuel tank.

Description

Electromagnetic pump device in the two-wheel fuel supply device for vehicle

Technical field

The present invention relates to by the fuel in the petrolift suction fuel bath, the fuel injection system that the fuel that boosts by the petrolift Fuelinjection nozzle through installing on fuel rail is supplied with to internal-combustion engine, wherein relate in particular at two-wheel car and as the tricycle of standard, the fuel injection system that uses in the general-purpose engine etc., and, the pump that acts as a fuel uses by plunger, suction side safety check, discharges the electromagnetic pump of the magneto drive that pump portion that the side safety check constitutes produces by solenoid part.

Background technique

As the present vaporizer C that uses as shown in Figure 7 of two-wheel vehicle used fuel supplying device.

That is, vaporizer C comprises the vaporizer main 52 with the throttle valve 51 that connects inner air-breathing road 50 and the air-breathing road 50 of switching; Be configured in the below of vaporizer main 52, the float chamber main body 54 of formation float chamber 53; Decide leveling device F by what the valve seat 54 that forms certain liquid in float chamber 53, buoy valve 55, buoy 56 constituted.

T is the fuel bath that stores fuel in inside.Opening forms to oilhole T1 above it, is formed for inserting the patchhole T3 of fuel plug described later (cock) K at bottom T2.

This patchhole T3 wears the outstanding patchhole tube T4 of portion by bottom T2 downwards, and patchhole T3 is by in the patchhole tube T4 of portion, in the T2 upper shed of the bottom of fuel bath T.

Fuel plug K is communicated with and blocking inflow road K1 and outflow road K2 by changing valve K3 conversion inflow road K1 and outflow road K2.

And the K4 of tube portion that comprises the inflow road K1 of fuel plug K is inserted into the patchhole T3 internal fixation of fuel bath T, and on the other hand, the outflow road K2 of fuel plug K connects configuration through fuel pipe 57 on valve seat 54.

If according to the above, the changing valve K3 of operation fuel plug K, connection keeps flowing into road K1 and flows out road K2, and then the fuel in fuel bath T flows out road K2 through inflow road K1, and fuel pipe 57 reaches on the valve seat 54 of vaporizer C, in this fuel supply float chamber 53.And if form certain level of fuel in float chamber 53, then buoy 56 moves upward float-controlled valve 55, closes valve seat 54, stops from the fuel supply of fuel pipe 57 in float chamber 53, can control float chamber 53 inherent certain liquid thus frequently.

Now, from preventing greenhouse effects of the earth, limit discharge of harmful gases, energy-conservation viewpoint is set out, and from the viewpoint by vaporizer control fuel, also uses the fuel injection system that Fuelinjection nozzle is arranged in two-wheel car.

At this, the 1st example with electromagnetic pump fuel pump apparatus of fuel in injection valve fueling groove is penetrated in combustion in fuel injection system discloses (symbol is used among the figure) on No. 3098166 communique of patent.

In view of the above, wear opening portion 1C on the 1a on fuel bath 1, the petrolift main body 21 that the 1a configuration is made of electromagnetic pump on fuel bath 1 is so that close this opening portion 1C.

And the suction pipe 21a that stretches downwards from petrolift main body 21 is to the bottom of fuel bath 1 1b opening.

Fuel bath main body 21 is passed through 2 construction bolts 23 on the 1a on fuel bath 1, tightening nut 24 is fastening.

Open open on the 2001-140733 communique (symbol with among the figure) with the 2nd example of the fuel injection system of electromagnetic pump the spy.

In view of the above, plunger pump 50 is configured in the below of fuel bath 40, and the inlet passage of plunger pump 50 is connected by pipe arrangement on fuel bath 40 bottoms through filter 140, and the discharge road of plunger pump 50 also is connected on the fuel rail of adorning Fuelinjection nozzle 30 by pipe arrangement.

Fuel rail is the configuration pressure regulator, and the fuel return pipe 150 of pressure regulator is connected with the bottom of fuel bath 40, and the fuel that flows in fuel return pipe 150 turns back in the fuel bath 40.

If according to the 1st example of such fuel pump apparatus, then because of on fuel bath, being necessary to wear and giving the different opening portion of oilhole, so can not intactly use the fuel bath that uses in the fuel supplying device of existing vaporizer.That is, be necessary on fuel bath, to wear new opening portion, in addition, need be closed in the patchhole of existing bottom opening.

Especially the fuel bath used of two-wheel car, from lightweight, the angle of design freedom is set out, the synthetic resin materials of using more, make fuel bath by injection-molded moulding, new opening portion is set on such fuel bath, need on metal pattern, prepare the jut suitable with opening portion.With the engraving metal pattern, on goods, form protuberance and compare, metal pattern is revised and is not easy.

Electromagnetic pump is configured in above the fuel bath, in the inner pump portion that forms of electromagnetic pump through suction pipe to the fuel bath bottom opening, if like this, then during the level of fuel displacement in fuel bath, when the initial stage of electromagnetic pump drives, fuel in fuel bath production when arriving the pump portion of electromagnetic pump is poor, undesirable.

Especially under the state that the fuel in fuel bath is few,, fuel wants spended time for arriving pump portion.

In above-mentioned, when internal-combustion engine stops, in suction pipe, forming substantially with fuel bath in the level of fuel liquid level of equal height substantially, exist between this liquid level and the pump portion that is in above it fuel less than the air part, under the few state of fuel in fuel bath, aforementioned air part is more.

In view of the above,, worry the air part repeated compression in the aforementioned suction pipe, worry to block the discharge responsiveness of electromagnetic pump at the driving initial stage of electromagnetic pump.

Electromagnetic pump is installed on the fuel bath by screw bolt and nut, and thus, the either party of the hexagonal of bolt part or nut need can not improve the fitting operation of electromagnetic pump to fuel bath to interior side's configuration of fuel bath.

If according to existing the 2nd example, then plunger pump disposes dividually with fuel bath, in view of the above, near fuel bath, wait and find fixing part, need on this fixing part, install, the non-movable piston pump, need to prepare special installation component, installation property is poor.If according to aforementioned,, need find the space segment that is used to dispose plunger pump at the space segment of fuel bath and fuel rail.Especially, limited as the space of two-wheel car, the configuration degrees of freedom of plunger pump is restricted.

In the bottom of fuel bath is the fuel return pipe that connects pressure regulator, can not be intactly with the fuel bath in the fuel supplying device of vaporizer.Promptly need on fuel bath, wear the opening that is used to connect fuel return pipe again.

Because plunger pump departs from the fuel bath configuration, so plunger pump need be connected with fuel bath with pipe arrangement.In view of the above, must prepare pipe arrangement.And, need be on plunger pump an end of connecting pipings, and the other end of pipe arrangement is connected to fuel bath, increased components number and number be installed, hindered the cost reduction.

Summary of the invention

The electromagnetic pump device of two-wheel car fuel supplying device of the present invention proposes in view of aforementioned inappropriate situation, and its purpose is to provide the electromagnetic pump that can use the fuel bath that uses in the fuel supplying device of existing vaporizer device.And the pipe arrangement that is provided between electromagnetic pump device and the fuel bath connects and the fuel current return circuit of pressure regulator and the electromagnetic pump device of the pipe arrangement ease of connection between the fuel bath.In addition, also provide electromagnetic pump device to two-wheel car mounting brilliance.Also provide the level of fuel in the fuel bath not to be changed to exert an influence, carry out the good electromagnetic pump device of stable fuel supply and responsiveness frequently.

The electromagnetic pump of two-wheel fuel supply device for vehicle of the present invention, in order to reach aforementioned purpose, fuel boosts in the fuel bath making by electromagnetic pump, and this fuel that boosts is offered in the two-wheel fuel supply device for vehicle on the Fuelinjection nozzle of installing in fuel rail, it the 1st is characterized as

The pump housing comprises insertion tube portion that stretches upward and the mounting flange portion that disposes in the side of inserting tube portion,

On aforementioned mounting flange, solenoid part is installed,

In the pump housing, comprise plunger that drives by solenoid part and the pump portion that constitutes by suction side safety check and discharge side safety check.

The pump inlet passage that is connected aforementioned suction side safety check is inserting tube portion upper end portion opening by inserting in the tube portion,

Insert tube portion by in the patchhole of fuel bath bottom upper shed, inserting configuration, the pump housing is installed on fuel bath.

The present invention also has the 2nd feature except aforementioned the 1st feature, that is, wear in the insertion tube portion of the aforementioned pump housing and be in the 2nd fuel passage of inserting in the tube portion towards the upper-end surface opening of insertion tube portion.

Aforementioned the 2nd fuel passage is connected with the backflow fuel passage of the fuel pressure pressure regulation of discharging from the electromagnetic pump device to the pressure regulator of predetermined pressure.

The present invention also has the 3rd feature except the aforementioned the 1st and the 2nd feature, that is, configuration can open and close the bleed member of these paths on the either party of aforementioned pump inlet passage or the 2nd fuel passage.

The present invention also has the 4th feature except aforementioned the 1st feature, that is, on the upper-end surface of the insertion tube portion of the aforementioned pump housing, the tubular filter component that configuration links to each other with the pump inlet passage in the projection plane of upper-end surface.

The present invention also has the 5th feature except aforementioned the 1st feature, that is, aforementioned solenoid part comprises and has end cup-shaped shell at least; The electromagnetic coil of winding cables on the periphery of coil carrier; When fixing on outer casing bottom, insert the fixed iron core that is configured in the electromagnetic coil, the shell of this solenoid part is disposed in loading and unloading freely on the mounting flange of the pump housing.

The present invention also has the 6th feature except aforementioned the 1st feature, promptly, the insertion tube portion of the aforementioned pump housing is in sealing component inserts the patchhole be configured in fuel bath the time, insert tube portion and connect support by the 1st restraint zone that on the periphery of the patchhole tube portion of the fuel bath that wears patchhole, disposes, by the 2nd restraint zone that is configured on the shell periphery, the solenoid part connection is supported on the fuel bath in addition.

The present invention also has the 7th feature except aforementioned the 5th feature, wear the stream that links to each other with pump portion on the fixed iron core that constitutes aforementioned solenoid part, and connects the configuration pressure regulator on the stream of this fixed iron core.

If according to the 1st feature of the present invention, then on the pump housing, dispose the pump portion of the safety check formation of plunger, suction side safety check, discharge side, the solenoid part of drive plunger is installed on the mounting flange of the pump housing, forms the electromagnetic pump device.

Interior side in the insertion tube portion of the pump housing wears the pump inlet passage that links to each other with the suction side safety check on the other hand, and the pump inlet passage is in the upper-end surface upper shed of inserting tube portion.

The insertion tube portion of the pump housing is inserted in the patchhole of fuel bath bottom upper shed and is fixing, and thus, the electromagnetic pump device is fixed configurations directly in the bottom of fuel bath.

If on solenoid part, switch on, driven pump portion, then the fuel in the fuel bath is drawn in the pump portion from the pump inlet passage of the upper-end surface upper shed of insertion tube portion, supplies with to the Fuelinjection nozzle that is configured in foreign side from the electromagnetic pump device at the fuel that pump portion boosts.

If according to the 2nd feature of the present invention, then in the insertion tube portion of the pump housing, differently be equipped with the 2nd fuel passage in the upper-end surface upper shed of inserting tube portion with the pump inlet passage, the backflow fuel passage of pressure regulator is connected with the 2nd fuel passage.Therefore the backflow fuel that flows through in the backflow fuel passage turns back in the fuel bath by the 2nd fuel passage that the insertion tube portion at the pump housing wears.

If according to the 3rd feature of the present invention, then for the maintenance of for example electromagnetic pump device during the fuel bath dismounting electromagnetic pump device, open in advance either party's bleed member can outwards take out the fuel in the fuel bath.

If according to the 4th feature of the present invention, because be positioned at the filter component on the projection plane of the upper-end surface of inserting tube portion in the upper-end surface configuration of inserting tube portion, so in the time of in the patchhole that insertion tube portion is inserted into fuel bath, by patchhole the filter component insertion is configured in the fuel bath without barrier.

If according to the 5th feature of the present invention, the electromagnetic coil and the fixed iron core that twine on the coil carrier of solenoid part by configuration in the enclosure form, because the shell loading and unloading are configured on the mounting flange of the pump housing freely, so under the pump housing is installed in state on the fuel bath, can carry out by the suction side safety check that disposes in the pump housing, discharge the side safety check, the pump portion that plunger constitutes and the upkeep operation of solenoid part.

If according to the 6th feature of the present invention, then the electromagnetic pump device is configured in the 1st restraint zone on the patchhole tube portion periphery of fuel bath by connection, make the insertion tube portion of the pump housing in the patchhole of fuel bath, connect support, in addition, by being configured in the 2nd restraint zone on the shell periphery, on fuel bath, connecting and support.Thus, insert airtight between tube portion and the patchhole by first restraint zone and kept by sealed member, particularly the solenoid part as weight portion is supported on the fuel bath by the connection of the 2nd restraint zone.

If according to the 7th feature of the present invention, then on constituting the fixed iron core of solenoid part, wear stream in, on this stream, connect the configuration pressure regulator.

And, because can compile the configuration pump housing, solenoid part and pressure regulator integratedly, so when can accumulate compact the installation, can increase substantially installation to two-wheel car.

If according to above-mentioned, then can shorten the length of the backflow fuel passage of the 2nd fuel passage that connects the pressure regulator and the pump housing.

Description of drawings

Fig. 1 is the sectional arrangement drawing of major component that electromagnetic pump device one embodiment of two-wheel fuel supply device for vehicle of the present invention is shown.

Fig. 2 is the upper plane figure of Fig. 1.

Fig. 3 is the two-wheel fuel supply device for vehicle system diagram of the assembled state of electromagnetic pump device on fuel bath.

Fig. 4 is the planimetric map of the 1st restraint zone.

Fig. 5 is the profile of Fig. 4.

Fig. 6 is the major component sectional arrangement drawing that other embodiment of electromagnetic pump device is shown.

Fig. 7 is the system diagram that the fuel supplying device that uses existing vaporizer is shown.

Symbol description: 1 pump housing; 1A inserts tube portion; 1B mounting flange portion; 1C inserts the upper-end surface of the tube 1A of portion; 1E pump inlet passage; 1F the 2nd fuel passage; 2 bleed members; 6 suction side safety check; 7 discharge the side safety check; 8 plungers; 10 shells; 11 coil carriers; 12 electromagnetic coils; 13 fixed iron cores; The 13A stream; 22 filter components; 23 sealing components; 24 the 1st restraint zones; 28 the 2nd restraint zones; P pump portion; The R pressure regulator; The S solenoid part; The T fuel bath; The T2 bottom; The T3 patchhole; T4 patchhole tube portion.

Embodiment

With reference to Fig. 1 and Fig. 2 one embodiment of the electromagnetic pump device of two-wheel fuel supply device for vehicle of the present invention is described as follows.

Fig. 1 is the vertical sectional view of the major component of electromagnetic pump device, and Fig. 2 is the upper plane figure of Fig. 1.The 1st, by the pump housing that aluminium material, zinc material, alloy resin material etc. form, the pump housing 1 comprises insertion tube 1A of portion and the 1B of mounting flange portion.Insert cylindrical shell 1A tubular ground formation upward on Fig. 1, the periphery of the insertion tube 1A of portion of end face (being called upper-end surface 1C) near is recessed on annular seal ditch 1D is set up.

On the one hand, wear pump inlet passage 1E from the below of upper-end surface 1C in inserting the tube 1A of portion.

Wear the 2nd fuel passage 1F from the below of upper-end surface 1C in inserting the tube 1A of portion.

If according to the above, wear pump inlet passage 1E and the 2nd fuel passage 1F the interior side who inserts the tube 1A of portion, then pump inlet passage 1E and the 2nd fuel passage 1F opening on the 1C of upper-end surface.

The below of aforementioned pump inlet passage 1E and the 2nd fuel passage 1F is with opening portion 1Ea and opening portion 1Fa, to foreign side's opening, the bleed member 2 that can open and close opening is set respectively on these opening portions 1Ea, 1Fa from the pump housing 1.

This routine bleed member 2 is to form externally threaded bolt on periphery, and this bolt screws tight configuration on aforementioned each opening portion, and usually, aforementioned each opening portion keeps closing by bleed member 2.

Aforementioned bleed member 2 can comprise 1 at least, and when for example disposing bleed member 2 on the opening portion 1Ea below pump inlet passage 1E, the 2nd fuel passage 1F there is no need to open to foreign side with opening portion 1Fa.(in other words, on the 2nd fuel passage 1F, there is no need to dispose bleed member 2).

The 2nd fuel passage 1F is what to be had to the 2nd opening portion 1Fb of foreign side's opening, and this should be connected with backflow fuel passage described later.

The 1B of mounting flange portion is configured in the below of inserting the tube 1A of portion, and inserting the side formation of the tube 1B of portion, the part of the 1B of mounting flange portion comprises the outstanding annular flange portion 1Ba in side to the right, wears work sealing ditch 1Bb circlewise on the periphery of this annular flange portion 1Ba.

And, in the pump housing 1, form, dispose to the following P of pump portion that stretches.

The 3rd, face the pump chamber that the 1B of mounting flange portion forms in the right side of Fig. 1 1Bc side, thus opening, inlet passage 4 and discharge road 5 are in pump chamber 3 upper sheds.

And the upstream side of inlet passage 4 is connected on the pump inlet passage 1E, and the downstream side of discharging road 5 is connected in the plunger sliding eye 1G of right side 1Bc upper shed of the 1B of mounting flange portion.

Configuration only allows from the mobile suction side safety check 6 of the fuel of pump inlet passage 1E in pump chamber 3 in aforementioned inlet passage, and configuration only allows from the mobile discharge side safety check 7 of the fuel of pump chamber 3 in plunger sliding eye 1G in discharging road 5.

In addition, in pump chamber 3, dispose plunger 8 also free to advance or retreatly.

Plunger 8 forms cylindric, propping up support sliding freely on the carriage 9 that is held on the pump housing 1, at the integrally formed holding flange 8A of portion of its right-hand member, wears the chase 8B that connects the holding flange 8A of portion on the 8A of this holding flange portion.

Aforementioned fixation lip part 8A gives prominence to right-hand from the right-hand member of bolt 9, disposes in plunger sliding eye 1G.

As mentioned above, the P of pump portion is by pump chamber 3, and suction side safety check 6 is discharged side safety check 7, and plunger 8 forms.

S is the solenoid part of the plunger 8 of the electric driven pump P of portion, following formation.

The 10th, the shell that end cup-shaped is arranged by conductive material forms forms the lip part 10B that stretches to the side on opening end 10A.

The 11st, to bottom 10C, make the coil carrier of the tubular of configuration on shell 10 from the opening end 10A of shell 10, twine electromagnetic coil 12 at the periphery superimposed layer of coil carrier 11.

13 is fixing in the heart in shell 10 bottom 10C, its left end is the fixed iron core that is made of the conductive material that disposes to interior side's insertion of coil carrier 11, connect from right to left side at the central part of fixed iron core 13 and to wear stream 13A, and on aforementioned right-hand member, screwing tight fuel joint 14, this fuel joint 14 is communicated with aforementioned stream 13A stream.

The 15th, in coil carrier 11 in the configuration sliding freely, make the movable core with the hollow cylindrical of fixed iron core 13 arranged opposite, this movable core 15 is by the 1st spring 16 attached potential energy, so that left by the left end of fixed iron core 13.

More than the solenoid part S of Gou Chenging is as follows, installs on the 1B of mounting flange portion of the pump housing 1.

Make the opening end 10A of shell 10 insert configuration to the periphery of the annular flange portion 1Ba of the 1B of mounting flange portion, at this moment, between the periphery of the interior week of the opening end 10A of shell 10 and annular flange portion 1Ba, configuration is used for the sealing component 17 of the O ring that disposes etc. in sealing ditch 1Bb.

The magnetic pole plectane 18 that configuration is made of magnetic material between the left end lip part of the right side of annular flange portion 1Ba 1Bc and coil carrier 11.

The left end side of movable core 15 is inserted and is configured in the plunger sliding eye 1G of the pump housing 1.

And, under such state, screw tight on by the 1B of mounting flange portion of screw 19 at the pump housing 1 at the lip part 10B of the shell 10 that disposes on the 1B of mounting flange portion of the pump housing 1.

By the above, solenoid part S installs on the pump housing 1, and at this moment, the 8A of holding flange portion of plunger 8 is configured on the fixedly stepped part 15A of movable core 15 by 20 contacts of the 2nd spring.Movable core 15 and plunger 8 contact with each other by the 1st spring 16 and the 2nd spring 20, support under state of equilibrium.

Movable core 15 as shown in Figure 1, the state of plunger 8 illustrates the non-power status to electromagnetic coil 12.

The 22nd, on the upper-end surface 1C of the insertion tube 1A of portion of the pump housing 1, erect the filter component that is provided with, make tubular in this example, on its peripheral part, paste filter screen 22A, its lower end snail tightly is configured in the pump inlet passage 1E of the upper-end surface 1C upper shed of inserting the tube 1A of portion.

This filter component 22 is configured in the projection plane of the upper-end surface 1C that inserts the tube 1A of portion.The configurating filtered member 22 of the interior side of the upper-end surface 1C that in Fig. 2, represents with dot and dash line.

Form electromagnetic pump device A according to the above, this electromagnetic pump device A is installed on the fuel bath T as shown in Figure 3, forms the two-wheel fuel supply device for vehicle.

Fuel bath T shown in Figure 3 is with shown in Figure 7 identical, with part prosign, and the omission explanation.

By opening portion in the lower opening of the patchhole T3 of fuel bath T, in patchhole T3, insert the insertion tube 1A of portion that configuration packet contains the filter component 22 of electromagnetic pump device A, at this moment, thickly sealing by sealing component 23 liquid such as O ring that in sealing ditch 1D, dispose between the periphery of inserting the tube 1A of portion and the patchhole T3.

Fashionable to patchhole T3 interpolation,,, the insertion in such patchhole T3 do not carry out so can having a bit obstacle ground because filter component 22 is configured in the projection plane of the upper-end surface 1C that inserts the tube 1A of portion the insertion tube 1A of portion that comprises such filter component 22.

Secondly, under the state that in patchhole T3, inserts the configuration insertion tube 1A of portion, on the periphery of the patchhole tube T4 of portion, make the 1st arciform restraint zone 24 as Fig. 4, configuration shown in Figure 5, the a pair of arm 24A, the 24B that stretch to the side from the arcuate section of the 1st restraint zone 24 are by bolt 25 and not shown fastening the screwing tight of nut, and electromagnetic pump device A fixed configurations is at the bottom of fuel bath T T2 thus.

D is adorning the fuel rail that sprays the Fuelinjection nozzle of compressed fuel to internal-combustion engine, and an effluent road Da who wears in inside is connected on the fuel joint 14 of electromagnetic pump device A through fuel pipe 26.On the one hand the stream Db at the opposite side of fuel rail D is connected on the fuel chambers Ra of pressure regulator R, is connected in by the backflow fuel passage 27 in the valve body Dd switch control of installing on the barrier film Dc on the 2nd opening portion 1Fb of the 2nd fuel passage 1F of electromagnetic pump device A.

Aforementioned fuel rail D, Fuelinjection nozzle J, pressure regulator R etc. is known, when being configured in electromagnetic pump device A connection on the fuel bath T, to Fuelinjection nozzle J, the pipe arrangement of pressure regulator R connects end.

Next illustrates its effect, in such two-wheel fuel supply device for vehicle, if additional electrical pulse signal on the electromagnetic coil 12 of solenoid part S, then the electromagnetic attraction that produces by solenoid part S of movable core 15 and with the 1st spring 16 of its antagonism between relative power relation move back and forth, plunger 1G or movable core 15 are back and forth moved synchronously.

That is, when movable core 15 dextrad moved, shell 8 moved to right-hand synchronously by the 2nd spring 20, and when movable core 15 left-hands moved, shell 8 moved to the left-hand pushing by the fixedly stepped part 15A of movable core 15.

By the to-and-fro motion of this plunger 8, because the chamber volume in the pump chamber 3 changes, pump portion plays a part suction, the excavationg pump of fuel.

Promptly, plunger 8 moves to right-hand at Fig. 1, because the chamber volume in the pump chamber 3 increases, pressure in the pump chamber 3 reduces, and then discharges side safety check 7 when closing discharge road 5 and keeping, suction side safety check 6 open inlet passages 4, fuel in the fuel bath T is member 22 after filtration, pump inlet passage 1E, inlet passage 4 sucks in pump chamber 3 and is full of.

On the one hand, plunger 8 moves to Fig. 1 left-hand, because the chamber volume reducing in the pump chamber 3, the pressure in the pump chamber 3 rises, and then suction side safety check 6 discharges side safety check 7 open row outlets 5 when cutting out inlet passage 4 and keeping.

The fuel that flows in discharging road 5 flows into plunger sliding eye 1G, the groove 8B of plunger 8, and in the interior side and stream 13A of movable core 15, this fuel is through fuel joint 14, and fuel pipe 26 is to the effluent road Da of fuel rail D, and the stream Db of opposite side provides.

Here, fuel in the opposite side stream Db imports in the fuel chambers Ra of pressure regulator R, by barrier film Dc, the residual fuel that the pressure regulation effect of valve body Dd produces refluxes through the 2nd fuel flow path 1F of backflow fuel passage 27 to electromagnetic pump device A, then turns back in the fuel bath T.

By decompression and the pressure regulation effect of above pressure regulator R, the fuel pressure in the fuel rail D is by the certain pressure of pressure regulation to regulation, and the Fuelinjection nozzle J of this fuel through installing on fuel rail D sprays to not shown internal-combustion engine and supply with.

If according to the electromagnetic pump device of the present invention of above formation, then electromagnetic pump device A constitutes by comprising the pump housing 1, the P of pump portion and the solenoid S that insert tube 1A of portion and the 1B of mounting flange portion, can intactly utilize existing fuel bath T in vaporizer.

That is, the 1st, the insertion tube 1A of portion of the pump housing 1 of electromagnetic pump device A insertion is configured in the patchhole T3 of fuel bath T, then, also can connect the patchhole tube T4 of portion of fuel bath T to the insertion tube 1A of portion of the pump housing 1 by the 1st restraint zone 24.

The 2nd, the backflow fuel passage 27 of pressure regulator R is connected on the 2nd fuel passage 1F of the pump housing 1, through the 2nd fuel passage 1F backflow fuel is turned back in the fuel bath T, so there is no need to be provided with the opening that backflow fuel is used on fuel bath T.

As mentioned above, can intactly use the fuel bath T that uses in the fuel supplying device of existing vaporizer, can extremely easily become fuel injection manner from the vaporizer mode.For example between such conversion period, do not need to transform the metal pattern of fuel bath T, do not need improvement expenses.

If electromagnetic pump device A directly is installed on the fuel bath T by inserting the tube 1A of portion, then the 1st for Motionless electromagnetic pump-unit A, there is no need to find out new fixed pedestal, and there is no need to prepare to be used for the electromagnetic pump device is installed in the installation component of the high prices such as supporter on the fixed pedestal.

The 2nd, especially as two-wheel car, be in the narrow scope of qualification installing space, so can improve the layout of electromagnetic pump device A and installation property.

The 3rd, because the pump inlet passage 1E that is provided with on the pump housing is directly at fuel bath T inner opening,, can reduces components number and improve the operability of pipe arrangement so can not be used to connect the pipe arrangement of electromagnetic pump device and fuel bath T.

If by the fuel joint 14 that links to each other with stream 13A is set on electromagnetic pump device A, and the 2nd opening portion 1Fb that the 2nd fuel passage 1F is set, then because fuel distribution tube 26 and backflow fuel passage 27 can jointly connect to single electromagnetic pump device A, so can improve the attended operation of aforementioned pipe arrangement.

To remove from fuel bath T is on the upper-end surface 1C of the filter component 22 of the purpose insertion tube 1A of portion that is configured in the pump housing 1 through the foreign matter that pump inlet passage 1E comprises to the fuel of the P of pump portion, if be configured in the projection plane of aforementioned upper-end surface 1C, the insertion tube 1A of portion of the pump housing 1 is inserted in the patchhole T3 of fuel bath T.

As the shape of such filter component 22, wish to make tubular as shown in this example.

If, then can improve its maintainability according to electromagnetic pump device A of the present invention, the 1st, before upkeep operation, can make in the fuel bath T fuel not to the outside splash ground, discharge reliably.

That is, be installed at electromagnetic pump device A under the state on the bottom T2 of fuel bath T, for example make bleed member 2 rotations of the opening portion 1Ea that closes pump inlet passage 1E, make opening portion 1Ea open.

If shown in above, then can make in the fuel bath T fuel through the opening portion 1Ea of pump inlet passage 1E do not splash ground, discharge to the outside reliably.Such bleed member 2 is by being set directly on the fuel bath T, carrying out the discharge operation of aforementioned fuel, yet, being necessary fuel bath is transformed, this can not intactly be used relevant with the fuel bath T that uses in existing vaporizer mode.

And, under the state that described fuel bath T vacates, even unload electromagnetic pump device A from fuel bath T the improper situation that so-called fuel overflows to the outside can not take place yet, can improve the operability of maintenance.

The 2nd, because solenoid part S by the shell 10 that end cup-shaped is arranged, be configured in the coil carrier 11 of the winding electromagnetic coil 12 in the shell 10 and on shell 10 fixing fixed iron core form, the lip part 10B of such shell 10 disposes freely by screw 19 loading and unloading on the 1B of mounting flange portion of the pump housing 1, so be installed under the state of fuel bath T at electromagnetic pump device A, can carry out the upkeep operation of solenoid part S and the P of pump portion.

Promptly loosening screw 19, can take out shell 10 from the pump housing 1, can take out coil carrier 11, magnetic pole plectane 18 and the movable core 15 that comprises the electromagnetic coil 12 in the shell 10 from shell 10 thus, can also take out plunger 8, carriage 9 and suction side safety check from the pump housing 1, can safeguard these parts that take out.

Be illustrated if return Fig. 3 again, then 28 is the 2nd restraint zones that dispose on the periphery of the shell 10 of solenoid S, and its shape makes and the 1st restraint zone 24 similar shapes shown in Figure 4, has opposed a pair of arm 28A, 28B.

The 2nd restraint zone 28 like this is configured on the periphery of shell 10, and arm 28A, 28B are connected from the outstanding protuberance T5 of fuel bath T by bolt 25 and not shown nut.

If according to the above, the insertion tube 1A of portion of electromagnetic pump device A is supported on the patchhole tube T of portion by 24 connections of the 1st restraint zone, shell 10 is supported on the protuberance T5 by 28 connections of the 2nd restraint zone, comparatively has weight in view of the above, and support by the 2nd restraint zone 28 at (the lip part 10B of shell 10 must be installed on the mounting flange 1B of the pump housing 1) the solenoid part S that supports under the one-sided state in side, so especially preferably be loaded on the fierce two-wheel car that slides.

The time with such the 2nd restraint zone 28, need to transform the fuel bath (on Fig. 7, putting down in writing) used in the vaporizer mode, protuberance T5 is set, yet, injection moulding, the metal pattern that uses in the blow moulding and forming can considerably be carved with protuberance T5, so this metal pattern can be implemented very simply.

Below, with reference to Fig. 6 other embodiment of electromagnetic pump device is illustrated.

To with the same structure part of Fig. 1, use prosign, omit its explanation.

On fixed iron core 13 fixing on the 10C of the bottom of shell 10, connect to right-hand member and wear stream 13A, from the intermediate portion of stream 13A upward, make fuel joint 14 bifurcateds from left end.

Pressure regulator R is clamping barrier film Dc between adjusting body 30 and covering 31, divides fuel chambers Ra and the Rb of spring housing by this barrier film Dc.Adjusting the inflow road 32 that is formed on fuel chambers Rc upper shed on the body 30 and flowing out road 33, be configured in valve seat 34 on the fuel chambers Ra inner opening end that flows out road 33 by opening and closing with the synchronization-moving valve body Dd of barrier film Dc.

(aforementioned pressure regulator R itself is known)

Such pressure regulator R is used in the external screw that forms on the shaft sleeve part 35 of the periphery that flows into road 32 and screws tight fixing on the right-hand member of fixed iron core 13, at this moment, be communicated with between the inflow road 32 of the stream 13A of fixed iron core 13 and adjustment body 30, flow out road 33 and be connected on the 2nd opening portion 1Fb of the 2nd fuel passage 1F through current return circuit 27.

If according to such electromagnetic pump device A, then because pressure regulator R and electromagnetic pump device A install in advance integratedly, can connect backflow fuel passage 27 in advance, so after electromagnetic pump device A is installed on the fuel bath T, can only connect the stream of fuel joint 14 and fuel rail D, so greatly improve the pipe arrangement attended operation when the two-wheel car mounting by fuel pipe 26.

Electromagnetic pump device A originally on one's body, because the pipe arrangement of backflow fuel that can concentrated area configuration flow excess pressure regulator R (flows out road 33, backflow fuel passage 27, the 2nd fuel passage 1F), so especially can shorten the path-length of backflow fuel passage 27 greatly, especially in the open on every side vehicle as two-wheel car, not only the layout of pipe arrangement and outward appearance are first-class, and can reduce the steam that in backflow fuel passage 27, produces, can reduce the steam flow that enters in the fuel bath T.

Because by take out electromagnetic pump device A from fuel bath T, can take out electromagnetic pump device (P of pump portion and solenoid part S) and pressure regulator R simultaneously, so can improve the operability that they are safeguarded.

Be installed on the electromagnetic pump device A by pressure regulator R, there is no need around fuel rail D, to prepare the holding space of pressure regulator R, especially can use near the space of internal-combustion engine of configuration fuel rail D and Fuelinjection nozzle J flexibly.

As mentioned above, if according to the electromagnetic pump device of two-wheel fuel supply device for vehicle of the present invention, then the pump housing comprises the insertion tube portion that stretches upward and is inserting the mounting flange portion that tube portion side disposes.

In aforementioned mounting flange portion, solenoid part is installed,

In the pump housing, comprise the plunger that drives by solenoid part and by returning valve only and discharge side and go back to the pump portion that valve only forms in the suction side.

Because make with aforementioned suction side and return the inlet passage of the pump that valve only links to each other by in the insertion tube portion, and at the upper end portion opening that inserts tube portion, so be used to install the inserting in the hole of fuel plug with the fuel bath that uses in the existing vaporizer by inserting the insertion tube portion of the aforementioned pump housing, the electromagnetic pump device can be installed on existing fuel bath, realize from the vaporizer mode conversion being fuel injection manner easily.

When the fuel bath of such electromagnetic pump device is installed, there is no need to find new fixing part, nor need be used on fixing part, installing the novel especially installation component that the electromagnetic pump device is used.

Because towards the pump inlet passage of the pump portion of electromagnetic pump device directly in fuel bath bottom upper shed, connection, so the connection operation that does not need the inflow pipe arrangement between fuel bath and the electromagnetic pump and flow into pipe arrangement, so by cutting down components number and being connected the reduction that operation can reach cost.

Owing to do not flow into pipe arrangement, can prevent pipe arrangement to expose to the outside, especially better to the direct vehicle that exposes to the outside such as the electromagnetic pump device as two-wheel car.If pass through the pump inlet passage in fuel bath bottom upper shed, no matter then because with pump inlet passage that pump portion links to each other in fuel bath residual fuel how much, often be full of fuel and do not contain air, so begin to supply stable fuel at once from electromagnetic pump device initial start stage.

By in the insertion tube portion of the pump housing, wearing towards the 2nd fuel passage that is in the upper-end surface opening that inserts the insertion tube portion in the tube portion, be provided for connecting the pipe portion of the backflow fuel passage of pressure regulator on the fuel bath that there is no need in existing vaporizer mode, to use, existing fuel bath be there is no need to do any change.

Because on the electromagnetic pump device, the 2nd opening portion of fuel joint, the 2nd fuel passage is set, so when the electromagnetic pump device is installed on the fuel bath, fuel pipe that fuel rail is linked to each other and the backflow fuel passage that links to each other with pressure regulator can be jointly to electromagnetic pump device (fuel joints, the 2nd opening portion) connects, at this moment because this joint specifies in electromagnetic pump device portion, so can be effectively and easily implement the attended operation of fuel pipe and backflow fuel passage.

If can open and close the bleed member of these paths by configuration on the either party of pump inlet passage or the 2nd fuel passage, then by either party by open pump inlet passage of aforementioned bleed member or the 2nd fuel passage, can make fuel in the fuel bath do not disperse towards periphery ground, remove reliably, so with the electromagnetic pump device from the fuel bath taking-up, be resultful when carrying out its upkeep operation.Even under the long-time situation about storing of two-wheel car experience, also can prevent the fuel variation in the fuel bath.

If by on the upper-end surface of the insertion tube portion of the pump housing, be in the projection plane of upper-end surface, the tubular filter component that configuration links to each other with the pump inlet passage, then during inserting in the patchhole that tube portion is inserted into fuel bath, filter component can not disturb patchhole, can implement the installation of electromagnetic pump device to fuel bath smoothly.

If by the shell of solenoid part is loaded and unloaded configuration freely in the mounting flange portion of the pump housing, then by taking out shell from mounting flange portion, make to constitute the plunger of coil carrier, movable core, formation pump portion of fixed iron core, the coiling electromagnetic coil of solenoid part and suction side safety check etc. and can take out from the right side of the mounting flange portion of the pump housing and need not take out fuel pump apparatus, can improve the housekeeping operation of these members from fuel bath.

The interior pump housing of patchhole that insertion is configured in fuel bath inserts tube portion by the 1st restraint zone connection support, the 2nd restraint zone that disposes on the periphery by the solenoid part shell is supported in the shell connection on the fuel bath, thereby especially when using two-wheel car, under the situation of sliding condition strictness, can be assembled in the electromagnetic pump device on the fuel bath reliably.

When on the fixed iron core that constitutes solenoid part, wearing the stream that links to each other with pump portion, on the stream of this fixed iron core, connect the configuration pressure regulator, then can shorten the length of backflow fuel passage thus.These especially make the better in appearance of the two-wheel car that externally exposes.Can reduce the steam that in the backflow fuel passage, produces, suppress steam entering in fuel bath effectively.

On the electromagnetic pump device, dispose pressure regulator, because these assemble in advance, so when can improve the fitting operation to two-wheel car, by taking out pressure regulator, can improve the degrees of freedom of near internal-combustion engine, dispose fuel rail and Fuelinjection nozzle configuration near the internal-combustion engine.

Claims (7)

1. the electromagnetic pump device in the two-wheel fuel supply device for vehicle, fuel in the fuel bath is boosted, and with this fuel supply of boosting to the two-wheel fuel supply device for vehicle that is installed in the Fuelinjection nozzle on the fuel rail, it is characterized by, the pump housing (1) has the insertion tube portion (1A) of extending upward and is configured in the mounting flange portion (1B) that inserts tube portion (1A) side

Solenoid part (S) is installed in described mounting flange portion (1B),

In the pump housing (1), have the plunger (8) that drives by solenoid part (S), by suction side safety check (6) with discharge the pump portion (P) of side safety check (7) formation,

The pump inlet passage (1E) that links to each other with described suction side safety check from insert in the tube portion (1A) by and in upper end portion (1C) upper shed of insertion tube portion (1A),

By inserting in the patchhole (T3) that tube portion (1A) inserts bottom (T2) upper shed be configured in fuel bath (T), the pump housing (1) is installed on the fuel bath (T).

2. the electromagnetic pump device in the two-wheel fuel supply device for vehicle according to claim 1, it is characterized by, in the insertion tube portion (1A) of the described pump housing, be equipped with to be in and insert in the tube portion (1A) and, described the 2nd fuel passage is linked to each other with the backflow fuel passage (27) that will be adjusted into the pressure regulator (R) of authorized pressure from the fuel pressure of electromagnetic pump device discharge to the 2nd fuel passage (1F) of upper-end surface (1C) opening of insertion tube portion (1A).

3. the electromagnetic pump device in the two-wheel fuel supply device for vehicle according to claim 1 and 2 is characterized by, and the either party of described pump inlet passage or the 2nd fuel passage (1F) goes up the bleed member (2) that configuration can open and close these paths.

4. the electromagnetic pump device in the two-wheel fuel supply device for vehicle according to claim 1, it is characterized by, go up configuration in the upper-end surface (1C) of the insertion tube portion (1A) of the described pump housing and be in the projection plane of upper-end surface (1C) and the tubular filter component (22) that links to each other with pump inlet passage (1E).

5. the electromagnetic pump device in the two-wheel fuel supply device for vehicle according to claim 1, it is characterized by, described solenoid part includes the shell (10) of end cup-shaped at least, the fixed iron core (13) that is configured in electromagnetic coil (12) in is gone up and inserted in the electromagnetic coil (12) of wound wire and the bottom (10C) that is fixed on shell (10) on the periphery of coil carrier (11), disposes the shell (10) of this solenoid part freely in the last loading and unloading of the mounting flange portion (1B) of the pump housing (1).

6. the electromagnetic pump device in the two-wheel fuel supply device for vehicle according to claim 1, it is characterized by, when the insertion tube portion (1A) of the described pump housing inserts in the patchhole (T3) that is configured in fuel bath (T) by sealing component (23), insert tube portion (1A) and connect support by the 1st restraint zone (24) on patchhole tube portion (T4) periphery that is configured in the fuel bath (T) that is equipped with patchhole (T3), in addition, by the 2nd restraint zone (28) that is configured on shell (10) periphery solenoid part (S) connection is supported on the fuel bath (T).

7. the electromagnetic pump device in the two-wheel fuel supply device for vehicle according to claim 5, it is characterized by, on the fixed iron core (13) that constitutes described solenoid part, wear the stream (13A) that links to each other with pump portion (P), and go up connection configuration pressure regulator (R) at the stream (13A) of this fixed iron core.

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