CN101228346B - Fuel pump - Google Patents
Fuel pump Download PDFInfo
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- CN101228346B CN101228346B CN2005800511472A CN200580051147A CN101228346B CN 101228346 B CN101228346 B CN 101228346B CN 2005800511472 A CN2005800511472 A CN 2005800511472A CN 200580051147 A CN200580051147 A CN 200580051147A CN 101228346 B CN101228346 B CN 101228346B
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- fuel
- air
- mentioned
- valve
- valve mechanism
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- 239000000446 fuel Substances 0.000 title claims abstract description 130
- 239000007787 solid Substances 0.000 claims description 7
- 238000006243 chemical reaction Methods 0.000 claims 3
- 238000007599 discharging Methods 0.000 abstract description 2
- 238000002347 injection Methods 0.000 abstract description 2
- 239000007924 injection Substances 0.000 abstract description 2
- 239000002828 fuel tank Substances 0.000 description 17
- 230000000052 comparative effect Effects 0.000 description 10
- 239000007921 spray Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 6
- 238000007789 sealing Methods 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000005755 formation reaction Methods 0.000 description 3
- 238000007914 intraventricular administration Methods 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 230000003042 antagnostic effect Effects 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/04—Feeding by means of driven pumps
- F02M37/08—Feeding by means of driven pumps electrically driven
- F02M37/10—Feeding by means of driven pumps electrically driven submerged in fuel, e.g. in reservoir
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D33/00—Controlling delivery of fuel or combustion-air, not otherwise provided for
- F02D33/003—Controlling the feeding of liquid fuel from storage containers to carburettors or fuel-injection apparatus ; Failure or leakage prevention; Diagnosis or detection of failure; Arrangement of sensors in the fuel system; Electric wiring; Electrostatic discharge
- F02D33/006—Controlling the feeding of liquid fuel from storage containers to carburettors or fuel-injection apparatus ; Failure or leakage prevention; Diagnosis or detection of failure; Arrangement of sensors in the fuel system; Electric wiring; Electrostatic discharge depending on engine operating conditions, e.g. start, stop or ambient conditions
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/0011—Constructional details; Manufacturing or assembly of elements of fuel systems; Materials therefor
- F02M37/0023—Valves in the fuel supply and return system
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D5/00—Pumps with circumferential or transverse flow
- F04D5/002—Regenerative pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D9/00—Priming; Preventing vapour lock
- F04D9/004—Priming of not self-priming pumps
- F04D9/006—Priming of not self-priming pumps by venting gas or using gas valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/20—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines characterised by means for preventing vapour lock
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2260/00—Function
- F05B2260/50—Kinematic linkage, i.e. transmission of position
- F05B2260/503—Kinematic linkage, i.e. transmission of position using gears
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
A fuel pump in which fuel injection conditions are not deteriorated by a discharge of vapor to the engine side and that achieves a large fuel suction height and a short fuel suction time. An air discharge opening and an air discharge valve mechanism are provided in a downstream channel including the end of the pump channel. The air discharge opening has a channel area s satisfying s >= 0.07 mm<2>.The air discharge valve mechanism is opened in the start of a pump to discharge sucked air, and the mechanism is closed upon the start of fuel pressurization, preventing the fuel from being discharged to the outside of the pump channel. Further, a vapor discharge opening and a vapor discharge valve mechanism are provided in that part of the pump channel which is between the air discharge opening and an inlet section of the pump channel. The vapor discharge valve mechanism is closed in the start of the pump, preventing negative pressure at a fuel suction opening from being reduced, and the mechanism is opened in the start of fuel pressurization, discharging fuel containing vapor to the outside of the pump channel.
Description
Technical field
The present invention relates to a kind of petrolift, it makes as the rotation of the impeller of solid of rotation, and fuel is picked up from fuel tank, at length says, relating to can be when improving the fuel suction performance, the petrolift that gas such as steam is discharged from the pump stream.
Background technique
Open the spy and to disclose this existing petrolift in the flat 11-218059 communique.This existing petrolift forms the pump stream around impeller, utilize the rotation of impeller that fuel is pressurizeed in this pump stream.This existing petrolift, than 1/2nd places of pump flow path length more by impeller sense of rotation side, for example in the terminal of pump stream, has the gas discharge outlet that diameter d is 0.2mm≤d≤0.9mm, under the lower state of the fuel pressure of pump stream, when being the petrolift low speed rotation, steam is discharged rapidly from gas discharge outlet, and on this gas discharge outlet, has valve system, it is in the fuel pressure of pump stream during more than or equal to the pressure of regulation, for make the steam that in the pump stream, produces with fuel to starting the pusher side ejection, with the gas discharge outlet obturation.
Patent documentation 1: the spy opens flat 11-218059 communique, particularly～the 3 page of left hurdle of the 28th row, the 2nd page of right hurdle the 20th row.
Summary of the invention
In existing petrolift, because before the pressure of fuel pressure more than or equal to regulation of pump stream, gas discharge outlet all is in the state of opening, and discharges the problem that exists the fuel spray volume to reduce from this gas discharge outlet so can not suppress fuel.In addition, because gas discharge outlet is closed by valve system, so the steam in that the fuel pressure of pump stream produces during more than or equal to the pressure of regulation can also exist the fuel spray volume that may cause nozzle the problem of error to occur with fuel to starting the pusher side ejection.
This invention proposes in order to address the above problem, and its purpose is, obtains a kind of petrolift, and it can reduce the fuel spray volume of petrolift when low speed rotation, and makes the steam can be to not starting pusher side ejection, and can improve the fuel inlet capacity.
Petrolift of the present invention, around solid of rotation, has the pump stream that forms from entrance part to terminal part, utilize the rotation of above-mentioned solid of rotation, fuel is picked up from the fuel suction port that is communicated with above-mentioned entrance part, and this fuel is pressurizeed by the said pump stream, it is characterized in that, on interior following stream, form air outlet at the terminal part that comprises the said pump stream, simultaneously on the said pump stream between this air outlet and the above-mentioned entrance part, form steam outlet, on above-mentioned air outlet, be provided with and prevent the bleed air valve mechanism of fuel from this air outlet discharge, in addition, on above-mentioned steam outlet, setting prevents to suck from this steam outlet the steam discharge valve mechanism of air, if fuel is pressurized in the said pump stream, then make above-mentioned bleed air valve mechanism from opening the valve state exchange to closing the valve state, make above-mentioned steam discharge valve mechanism from closing the valve state exchange to opening the valve state.
The effect of invention
In petrolift of the present invention, owing on interior following stream, form air outlet at the terminal part that comprises the pump stream, so can be with long pump stream as the pressurization stream from the entrance part of pump stream to its terminal part, because till fuel is pressurized in the pump stream, steam discharge valve mechanism all is in the valve state that closes, so the long pump stream that can effectively utilize from entrance part to terminal part carries out picking up of fuel, the negative pressure of fuel suction port is increased, improve the fuel inlet capacity.
Description of drawings
Fig. 1 represents the sectional drawing of the mode of execution 1 of petrolift of the present invention.
Fig. 2 is the sectional drawing along the A-A line among Fig. 1.
Fig. 3 is the sectional drawing along the B-B line among Fig. 2.
Fig. 4 is the sectional drawing along the C-C line among Fig. 2.
Fig. 5 (a) and (b) be the result's of the expression fuel inlet capacity of measuring mode of execution 1 and Comparative Examples performance plot.
Fig. 6 be the expression aperture of air outlet and air by the time the performance plot of the pressure loss.
Fig. 7 is the performance plot of the discharge flow rate of expression aperture of air outlet and fuel.
Fig. 8 is the sectional drawing of the air exhaust port part in the mode of execution 2 of petrolift of the present invention.
Embodiment
Mode of execution 1
Fig. 1 is the sectional drawing of the mode of execution 1 of expression petrolift of the present invention, and Fig. 2 is the sectional drawing along the A-A line among Fig. 1, the outer housing cover in the expression mode of execution 1.Fig. 3 is the sectional drawing along the B-B line among Fig. 2, the air outlet part in the expression mode of execution 1.Fig. 4 is the sectional drawing along the C-C line among Fig. 2, the steam outlet part in the expression mode of execution 1.In addition, Fig. 5～Fig. 7 is a performance plot, Fig. 5 (a) and the result who (b) represents to measure with Comparative Examples the fuel inlet capacity for the effect of clearer and more definite present embodiment 1, Fig. 6 and Fig. 7 represent to use the estimation result of the flowmeter formula of nozzle type Venturi meter respectively, Fig. 6 represents the aperture of air outlet and air through the out-of-date pressure loss, and Fig. 7 represents the aperture of air outlet and the discharge flow rate of fuel.
In Fig. 1, petrolift 10 for example uses in the fuel supply system of vehicle etc.Specifically, petrolift 10 is contained in the fuel tank of not shown vehicle, will supply with to motor E from the fuel that this fuel tank sucks.This petrolift 10 is made of the motor part 30 of pump portion 20 and this pump portion 20 of driving.The electromagnetic drive part that motor part 30 constitutes pump portion 20.Motor part 30 is direct current motors of charged brush, and it constitutes in the housing 11 of pipe shape with the not shown permanent magnet of ring-type configuration, in interior all sides of this permanent magnet with concentric circles configuration armature 32.On the other hand, pump portion 20 constitutes by housing main body 21, outer housing cover 22 and as impeller 24 of solid of rotation etc.In addition, because this pump portion 20 is major components of the present invention, so following this pump portion 20 is at length described.
Aforementioned housing main body 21 and outer housing cover 22 for example utilize the die cast of aluminium and form, and constitute a case member 200 by these housing main bodies 21 and outer housing cover 22, can accommodate impeller 24 in the inside of this case member 200 with rotating freely.Housing main body 21 is pressed into the inboard of an end being fixed in housing 11.Outer housing cover 22 is to cover the mode of this housing main body 21, and is relative with housing main body 21, utilizes riveted joint to wait an end that is fixed in housing 11.At the center of housing main body 21 setting-in bearing 25, in addition, be pressed into fixedly thrust-bearing 26 at the center of outer housing cover 22.An end of the running shaft 35 of armature 32 diametrically can rotate freely support by bearing 25, in addition running shaft 35 axially on load support by thrust-bearing 26.In addition, another end of running shaft 35 can be supported by bearing 27 diametrically with rotating freely.
As everyone knows, be formed with fuel suction port 40 on outer housing cover 22, utilize the impeller 24 at peripheral portion formation blade to be rotated, the fuel 100 in the fuel tank is sucked into the pump stream 41 from fuel suction port 40 through filter by suction 101 and suction pipes 102.This pump stream 41 is along the periphery of impeller 24, forms with C word shape roughly between housing main body 21 and outer housing cover 22.In addition, well-known, be sucked into fuel in the pump stream 41 (for fuel tank in fuel 100 distinguish and label not.Below identical), utilize the rotation of impeller 24 pressurized after, force feed is to the fuel chambers 31 of motor part 30.
Below, outer housing cover 22 is at length described.In Fig. 2, with the opposing side of housing main body 21 (with reference to Fig. 1) on form the fuel bath 23 of C word shape.Form groove path 50 by this fuel bath 23.In addition, on housing main body 21, form the groove path 50a relative, by these groove paths 50,50a, at the inside of case member 200 formation pump stream 41 with groove path 50.Groove path 50 is made of entrance part 51, importing passage portion 52 and pressurization passage portion 53, this entrance part 51 is communicated with fuel suction port 40, this imports passage portion 52 from above-mentioned entrance part 51, its duct width narrows down gradually, and its passage depth shoals, and this pressurization passage portion 53 forms towards the terminal part 54 of groove path 50 from importing passage portion 52.In addition, in Fig. 2, represent sense of rotation as the impeller 24 of solid of rotation with arrow N.Direction along this sense of rotation N forms groove path 50 from entrance part 51, and extends to terminal part 54.
In groove path 50, form air outlet 110 and steam outlet 120.These air outlets 110 and steam outlet 120 run through outer housing cover 22 respectively, with the fuel tank internal communication outside pump stream 41 and the petrolift 10 (with reference to Fig. 1).Air outlet 110 forms on the terminal part 54 of groove path 50.Steam outlet 120 is between entrance part 51 and air outlet 110, and the counterrotating side opposite with sense of rotation N at air outlet 110 forms on the position of the predetermined distance of being separated by.Air outlet 110 has the function of when petrolift starts the air of pump stream 41 and the inner existence of suction pipe 102 (with reference to Fig. 1) being discharged to fuel tank, in addition, steam outlet 120 has the function that the steam that comprises the steam that acts as a fuel that will be in pump stream 41 produces is discharged to fuel tank at interior bubble (hereinafter referred to as steam).
Below, these exhaust ports 110,120 are described.In Fig. 3, at the outlet side of air outlet 110, be the downside of the air outlet 110 of Fig. 3, configuration is by being fixed in valve base part 112 on the outer housing cover 22, valve member 113, and the bleed air valve mechanism 111 that constitutes of spring 114.Valve base part 112 is for example by resin forming, becomes the through hole 115 of air flue at central part, and the aperture of this through hole 115 is set at the aperture greater than air outlet 110.On the other hand, be respectively equipped with spring seat 116a, 116b on valve member 113 and outer housing cover 22, free length is set at and does not make valve member 113 spring 114 of position on valve base part 112 that fall, and is inlaid on two spring seat 116a, the 116b.
In Fig. 4, at the outlet side of steam outlet 120, be the downside of the steam outlet 120 of Fig. 4, configuration is by being formed at valve seat 122 on the outer housing cover 22, valve member 123, spring compression parts 124, and the steam discharge valve mechanism 121 that constitutes of spring 125.Spring compression parts 124 are for example by resin forming, become the through hole 126 of steam passage at central part, and the aperture of this through hole 126 is set at the aperture greater than steam outlet 120.On the other hand, on spring compression parts 124 and valve member 123, be respectively equipped with spring seat 127a, 127b, valve member 123 to making valve member 123 fall to being positioned at the spring 125 of pretension on the direction of valve seat 122, is inlaid on two spring seat 127a, the 127b.
Below, the action to petrolift 10 describes according to above-described structure.As shown in Figure 1, by illustrated power supply never, via being embedded in the terminal 46 in the connector 45, not shown brush and the commutator 34 that disposes on the top that can be contained in the armature 32 in the motor 30 with rotating freely, coil (unlabelled) supply capability to the periphery of the magnetic core 32a that is wound on armature 32, armature 32 is rotated, running shaft 35 is rotated, and follows the rotation of this running shaft 35, and impeller 24 also is rotated.
If impeller 24 rotates, then be present in the air of pump stream 41 inside, bear the kinetic energy of each blade of impeller 24, boosted in the inside of this pump stream 41.And, at this moment, because bleed air valve mechanism 111 (with reference to Fig. 3) is in out the valve state, be that air outlet 110 is in open state towards fuel tank, in addition, steam discharge valve mechanism 121 (with reference to Fig. 4) is in the valve state that closes, and promptly steam exhaust-gas mouth 120 is in closed condition towards fuel tank, so boosted air is only discharged from air outlet 110 (with reference to Fig. 2).Discharge by this air that boosts, near fuel suction port 40, produce negative pressure, the inner air of the suction pipe 102 that is connected with fuel suction port 40 also is sucked in the pump stream 41, its result, be sucked into the pump stream 41 from fuel suction port 40 through the fuel 100 in suction pipe 102 and the fuel tank, as hereinbefore, bear the kinetic energy of each blade of impeller 24, boosted in the inside of pump stream 41.
If the fuel of pump stream 41 inside begins to boost, then the bleed air valve mechanism 111 of Fig. 3 is immediately from opening the valve state exchange to closing the valve state, and in addition, the steam discharge valve mechanism 121 of Fig. 4 is immediately from closing the valve state exchange to opening the valve state.Specifically, utilization increases because of the load that the proportion difference of air and fuel causes, the contractile force of valve member 113 antagonistic springs 114 of bleed air valve mechanism 111, fall to being positioned on the valve base part 112 and with through hole 115 sealings, in addition, the pretightening force of valve member 123 antagonistic springs 125 of steam discharge valve mechanism 121 is left and steam outlet 120 is opened from valve seat 122.By air outlet 110 is closed, suppress unnecessary fuel and discharge from this air outlet 110, in addition,, the steam that produces under the higher state of fuel pressure is discharged to fuel tank by steam outlet 120 is opened.Like this, boosted fuel in pump stream 41, force feed around armature 32, are discharged to motor E from fuel discharge outlet 43 to fuel chambers 31 shown in Figure 1.In addition, as shown in Figure 1, accommodate safety check 44 in fuel discharge outlet 43, for example, when motor E stopped, the pressure by safety check 44 keeps in the pipe arrangement of motor E made the startability of motor good.
Thus, spring parameter by setting spring 114 and 125, thereby beginning with boosting of fuel is the boundary, the bleed air valve mechanism 111 that is in out the valve state before making it to close the valve state exchange, make in addition be in close the valve state steam discharge valve mechanism 121 to opening the valve state exchange, at first, when the fuel when comprising the petrolift low speed rotation pressurizes, owing to all the time air outlet 110 is closed, can prevent that fuel from flowing out, so the fuel spray volume can not reduce.Secondly, owing under the fuel pressurized state, steam outlet 120 is opened, the steam that prevents to produce is to the ejection of motor E side, so can obtain to guarantee exactly the effect of the fuel injection amount of nozzle.In addition, on the basis of this effect, because till the boosting of aforementioned fuel, steam outlet 120 is all closed, so can prevent the negative pressure of fuel suction port 40 descends, simultaneously for the pump stream 41 in an about week case member 200 in, owing to can utilize from fuel suction port 40 to air outlet 110 roughly whole path as the pressurization stream of length, so can increase the negative pressure of fuel suction port 40.Increase by this negative pressure, the fuel of the target that the performance that can improve becomes petrolift 10 improves picks up height (shown in Figure 1 from level of fuel to fuel suction port 40 size h), especially, can expect to improve and comprise fuel tank in interior layout design degrees of freedom.
In present embodiment 1, pick up height, be the raising of fuel inlet capacity in order to confirm this fuel, according to Fig. 5 (a) result who measures with Comparative Examples is described.The fuel that the fuel of 5 (a) expression present embodiment 1 picks up characteristic C1 and Comparative Examples picks up characteristic C2, and transverse axis is represented fuel pick-up time (sec), and the longitudinal axis represents that fuel picks up height (mm).In addition, Comparative Examples is to make air outlet 110 normally closed, and steam outlet 120 is often opened.That is, the pressurization stream of present embodiment 1 becomes from fuel suction port 40 to air outlet the roughly whole path of 110 pump path 41 as previously mentioned, and is relative with it, and the pressurization stream of this Comparative Examples shortens to from fuel suction port 40 to air outlet 120.Compare if these fuel are picked up characteristic C1, C2, then for example under the fuel pick-up time is 4 seconds situation, present embodiment 1 has the fuel about 2 times with respect to Comparative Examples and picks up height.Acting as a fuel picks up characteristic C1, more from the lower right (that is, the time is long and highly low) of chart to upper left side (that is, the time is short and highly high), its fuel picks up ability, it is high more with respect to the ratio of fuel pick-up time to be that fuel picks up height.Therefore as can be known, present embodiment 1 is with respect to Comparative Examples, and its fuel inlet capacity is higher.The pump chamber Pressure characteristics P1 of Fig. 5 (b) expression mode of execution 1 and the pump chamber Pressure characteristics P2 of Comparative Examples, transverse axis is represented the length of the pressurization path of pump path 41, the longitudinal axis is represented the pump intraventricular pressure in the pump path 41.Arrow P a, Pb, Pc represent the position of fuel suction port 40, the position of steam outlet 120, the position of air outlet 110 respectively.In the transverse axis position of Fig. 5 (b), the pump intraventricular pressure of the longitudinal axis is barometric pressure Pat, and this pump intraventricular pressure is from X below and negative pressure becomes big.Negative pressure on the Pa of the position of fuel suction port 40 is negative pressure Pn1, and is negative pressure Pn2 that negative pressure Pn1 is greater than negative pressure Pn2 in Comparative Examples in present embodiment 1.Utilize present embodiment 1 can improve the fuel inlet capacity, just because of in pump chamber Pressure characteristics P1, the pressurization stream is long more, the starting point of this pressurization stream, is that the negative pressure of fuel suction port 40 is big more under the situation of present embodiment 1.
As described above,, must fully guarantee the stream that pressurizes, therefore, in present embodiment 1, the valve of opening that closes valve and steam discharge valve mechanism 121 of bleed air valve mechanism 111 roughly side by side be carried out in order to improve the fuel inlet capacity.And preferably the spring parameter with two springs 114,125 is set at, make and do not influence the degree of the fuel spray volume of nozzle with steam to the ejection of motor E side,, postpone a little and carry out the valve of opening of steam discharge valve mechanism 121 from opening the valve state after closing the valve state exchange in bleed air valve mechanism 111.In addition, air outlet 110 and bleed air valve mechanism 111, as long as on the following stream in more downstream side of the pump stream 41 that becomes the pressurization stream, and on the fuel flow path of the upstream side of safety check 44, whatsoever the position can obtain same effect.But, follow air to enlarge at terminal part 54 to the detention space between the air outlet from pump stream 41, the air volume that discharge increases, thus the fuel pick-up time can increase.As long as the quality of this increase is according to the position in the fuel tank of this petrolift etc. suitably judging.
No matter which position this air outlet 110 is disposed on, the pressure loss the when size of its aperture d (with reference to Fig. 3) all must make air through this air outlet 110 can not have problems.Fig. 6 represents the pressure loss characteristic PL of air outlet 110, and transverse axis is represented the aperture (mm) of air outlet 110, the longitudinal axis represent air by the time the pressure loss (kPa).According to Fig. 6, if since the aperture more than or equal to 0.3mm, then air becomes about 0 (kPa) through the out-of-date pressure loss, so the aperture d of preferred air outlet 110 is more than or equal to 0.3mm.Its result, the resistance force diminishes of inhaled air when fuel tank is discharged during owing to pump startup can shorten the time that air is discharged, and supplies power to the time that fuel begins to boost so can shorten from beginning to petrolift, i.e. the fuel pick-up time.In addition, the shape of air outlet 110 for example is circular, but needs not to be circular, as long as aperture d is scaled s 〉=0.07mm behind the flow path area s
2, arbitrary shape all can.
In addition, though the upper limit for the aperture d of air outlet 110 is not mentioned, but generally be made as the value after the sectional area that is less than or equal to pump stream 41 is scaled aperture d, but, if consider the situation of not closing valve just in case bleed air valve mechanism 111 breaks down, even fuel is discharged from air outlet 110 when then carrying out the fuel pressurization in pump stream 41, also must guarantee fuel spray volume to motor.That is aperture d that, must setting air exhaust port 110 is so that be no more than petrolift fuel spray volume originally from the fuel discharge flow rate of air outlet 110.Fig. 7 represents the fuel discharge characteristic FE of air outlet 110, and transverse axis is represented the aperture (mm) of air outlet 110, and the longitudinal axis is represented the discharge flow rate (L/h) of fuel.According to Fig. 7, for example, at petrolift fuel spray volume originally is under the situation of 80 (L/h), because if the aperture d of air outlet 110 is 1.0 (mm), then the fuel discharge flow rate from air outlet 110 is 80 (L/h), so be about 0 to the motor fuel spray volume, if be less than or equal to 0.8 (mm) but the aperture d of air outlet 110 is set at, then the fuel discharge flow rate from air outlet 110 is less than or equal to 80 (L/h), can keep to motor and supply with necessary MIN fuel.
Mode of execution 2
Fig. 8 is the sectional drawing of the air exhaust port part in the mode of execution 2 of petrolift of the present invention.This Fig. 8 is the suitable sectional drawing of Fig. 3 of expression air outlet part mode of execution 2 and mode of execution 1.Additional air inlet prevents that the valve system 130, (Fig. 3) is identical in fact with mode of execution 1 on 110 because this mode of execution 2 is except discharging at air, so prevent that with this air inlet valve system 130 from being that the center describes.
In Fig. 8, at the outlet side of bleed air valve mechanism 111, be that the downside configuration air inlet of the bleed air valve mechanism 111 among Fig. 8 prevents valve system 130, it prevents that by being fixed in the air inlet that air inlet on the valve base part 112 prevents valve base part 131 and have a umbrella shape shape valve member 132 from constituting.Air inlet prevents that valve base part 131 from for example adopting resin forming, is formed with: valve member retaining hole 133, and portion inserts fixedly air inlet and prevents valve member 132 in the central; Passage portion 134, it becomes the air drain passageway; And sealed department 135, it carries out and air inlet prevents sealing between the valve member 132.On the other hand, air inlet prevents that valve member 132 by elastomer formations such as rubber, has: umbrella portion 136, its have and sealed department 135 between the sealing function; Axial region 137, it inserts in the valve member retaining hole 133; And abjunction preventing part 138, it prevents to come off from valve member retaining hole 133.That is, as shown in the figure, be fixed in the valve member retaining hole 133 if abjunction preventing part 138 is run through, then umbrella portion 136 is close to sealed department 135 and with passage portion 134 obturations.In addition, air inlet prevents that valve base part 131 from also can form with valve base part 112.
Below action is described, when petrolift starts,, prevent valve system 130 so the air in the pump stream 41 arrives air inlet from air outlet 110 because bleed air valve mechanism 111 drives valve.Pressure when this air is discharged is easily pushed umbrella portion 136 open, its result, and air from passage portion 134 and mode of execution 1 is similarly discharged to petrolift.Therefore, air inlet prevents the air discharge function that valve system 130 does not hinder bleed air valve mechanism 111 to be had.
On the other hand, when petrolift stopped, the inner fuel of suction pipe 102 (with reference to Fig. 1) can fall to the interior level of fuel height of fuel tank owing to deadweight, accompanies with it, on the contrary, air can flow to pump stream 41 via air outlet 110 when starting with petrolift.Therefore, prevent in the mode of execution 1 of valve system 130 not having air inlet, from Fig. 3 also as can be known, bleed air valve mechanism 111 drives valve owing to follow petrolift to stop, so air flows to pump stream 41 by through hole 115 and air outlet 100, accompany with it, the fuel of suction pipe 102 inside falls to level of fuel.Therefore, when petrolift started once more, petrolift 10 must pick up fuel to fuel suction port 40 from the level of fuel in the fuel tank once more, with this fuel pick-up time part accordingly, fuel boosts and must postpone.
In present embodiment 2, because air inlet prevents valve member 132 with sealed department 135 sealings, so after pump stopped, air can not flow into to pump stream 41 from air outlet 110 yet, so the state that fuel is full of can be kept in the inside of pump stream 41 and suction pipe 102.That is, utilize the air inlet of umbrella to prevent valve member 132, in Fig. 8, air is pushed umbrella portion 136 open from the top down and is flowed, but from bottom to top, because sealed department 135 is by 136 sealings of umbrella portion, so air does not flow.Prevent valve system 130 by increasing this air inlet, can realize the effect described in the mode of execution 1, simultaneously further, when petrolift starts once more, can begin fuel immediately and boost, thereby can expect to improve the startability of motor.
Industrial applicibility
Petrolift of the present invention can be used for the fuel feed system in the vehicles such as automobile.
Claims (7)
1. petrolift, it has the pump stream that forms from entrance part to terminal part around solid of rotation, utilize the rotation of above-mentioned solid of rotation, fuel is picked up from the fuel suction port that is communicated with above-mentioned entrance part, and this fuel is pressurizeed by the said pump stream, it is characterized in that
On interior following stream, form air outlet at the terminal part that comprises the said pump stream, simultaneously on the said pump stream between this air outlet and the above-mentioned entrance part, form steam outlet, on above-mentioned air outlet, be provided with and prevent the bleed air valve mechanism of fuel from this air outlet discharge, in addition, on above-mentioned steam outlet, setting prevents to suck from this steam outlet the steam discharge valve mechanism of air
If fuel is pressurized in the said pump stream, then make above-mentioned bleed air valve mechanism from opening the valve state exchange to closing the valve state, make above-mentioned steam discharge valve mechanism from closing the valve state exchange to opening the valve state.
2. petrolift according to claim 1 is characterized in that,
On the terminal part of said pump stream, form above-mentioned air outlet.
3. petrolift according to claim 1 is characterized in that,
More lean on the fuel flow path in downstream side at terminal part, form above-mentioned air outlet than said pump stream.
4. petrolift according to claim 1 is characterized in that,
It constitutes, above-mentioned bleed air valve mechanism from opening valve state roughly side by side carrying out to the conversion of opening the valve state to conversion of closing the valve state and above-mentioned steam discharge valve mechanism from closing the valve state.
5. petrolift according to claim 1 is characterized in that,
It constitutes, above-mentioned steam discharge valve mechanism from closing the valve state to opening the valve state exchange, postpone a little to carry out to the conversion of closing the valve state from opening the valve state than above-mentioned bleed air valve mechanism.
6. petrolift according to claim 1 is characterized in that,
The flow path area s of above-mentioned air outlet is s 〉=0.07mm
2
7. petrolift according to claim 1 is characterized in that,
In above-mentioned bleed air valve mechanism, set up air inlet and prevent valve system, when it is in out the valve state in above-mentioned bleed air valve mechanism, prevent that air from entering to above-mentioned air outlet.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005232967A JP4753659B2 (en) | 2005-08-11 | 2005-08-11 | Fuel pump |
| JP232967/2005 | 2005-08-11 | ||
| PCT/JP2005/019474 WO2007017960A1 (en) | 2005-08-11 | 2005-10-24 | Fuel pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101228346A CN101228346A (en) | 2008-07-23 |
| CN101228346B true CN101228346B (en) | 2011-05-18 |
Family
ID=37727155
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2005800511472A Expired - Fee Related CN101228346B (en) | 2005-08-11 | 2005-10-24 | Fuel pump |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20070269320A1 (en) |
| JP (1) | JP4753659B2 (en) |
| KR (1) | KR20070094938A (en) |
| CN (1) | CN101228346B (en) |
| TW (1) | TWI274811B (en) |
| WO (1) | WO2007017960A1 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4693809B2 (en) * | 2007-04-03 | 2011-06-01 | 三菱電機株式会社 | Fuel pump module |
| JP5202642B2 (en) * | 2008-10-15 | 2013-06-05 | 三菱電機株式会社 | rice cooker |
| JP2010138776A (en) * | 2008-12-11 | 2010-06-24 | Mitsubishi Electric Corp | Fuel supply apparatus |
| JP5896549B2 (en) * | 2011-07-20 | 2016-03-30 | 株式会社ダイヘン | COOLING UNIT AND WORK CONVEYING DEVICE USING THE SAME |
| JP2013029049A (en) * | 2011-07-27 | 2013-02-07 | Mitsubishi Electric Corp | Vehicle fuel supply device |
| JP2017089406A (en) * | 2015-11-04 | 2017-05-25 | 三菱電機株式会社 | Fuel supply system |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1652973A (en) * | 2002-05-07 | 2005-08-10 | 小拉塞尔·沙恩·泽朗格 | Method and system for preventing vehicle misfuelling |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6334388U (en) * | 1986-08-20 | 1988-03-05 | ||
| JPH03104198U (en) * | 1990-02-09 | 1991-10-29 | ||
| US5039284A (en) * | 1990-05-08 | 1991-08-13 | Walbro Corporation | Fuel pump with a vapor vent valve |
| DE4020520A1 (en) * | 1990-06-28 | 1992-01-02 | Bosch Gmbh Robert | AGGREGATE FOR PROCESSING FUEL FROM THE STORAGE TANK TO THE INTERNAL COMBUSTION ENGINE OF A MOTOR VEHICLE |
| JP3107438B2 (en) * | 1992-01-14 | 2000-11-06 | 三菱電機株式会社 | Electric fuel pump |
| DE19618452B4 (en) * | 1996-05-08 | 2005-05-12 | Robert Bosch Gmbh | Aggregate for conveying fuel from a storage tank to an internal combustion engine |
| US5718208A (en) * | 1996-09-16 | 1998-02-17 | Ford Motor Company | Fuel vapor management system |
| JPH11218059A (en) * | 1998-02-02 | 1999-08-10 | Denso Corp | Fuel pump |
| DE19832827C1 (en) * | 1998-07-21 | 2000-02-24 | Bosch Gmbh Robert | Device for fuel delivery by means of a fuel delivery unit arranged in a housing |
| US6739844B1 (en) * | 2000-06-09 | 2004-05-25 | Visteon Global Technologies, Inc. | Fuel pump with contamination reducing flow passages |
| JP2002235625A (en) * | 2000-12-07 | 2002-08-23 | Mitsubishi Electric Corp | Electric fuel pump |
| US20040258545A1 (en) * | 2003-06-23 | 2004-12-23 | Dequan Yu | Fuel pump channel |
-
2005
- 2005-08-11 JP JP2005232967A patent/JP4753659B2/en not_active Expired - Fee Related
- 2005-10-24 CN CN2005800511472A patent/CN101228346B/en not_active Expired - Fee Related
- 2005-10-24 KR KR1020077017151A patent/KR20070094938A/en not_active Application Discontinuation
- 2005-10-24 WO PCT/JP2005/019474 patent/WO2007017960A1/en not_active Application Discontinuation
- 2005-10-24 US US11/793,692 patent/US20070269320A1/en not_active Abandoned
- 2005-12-13 TW TW094143994A patent/TWI274811B/en not_active IP Right Cessation
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1652973A (en) * | 2002-05-07 | 2005-08-10 | 小拉塞尔·沙恩·泽朗格 | Method and system for preventing vehicle misfuelling |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20070094938A (en) | 2007-09-27 |
| TW200706756A (en) | 2007-02-16 |
| JP4753659B2 (en) | 2011-08-24 |
| US20070269320A1 (en) | 2007-11-22 |
| WO2007017960A1 (en) | 2007-02-15 |
| JP2007046562A (en) | 2007-02-22 |
| TWI274811B (en) | 2007-03-01 |
| CN101228346A (en) | 2008-07-23 |
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