Background technology
In engine fuel oil system, the effect of fuel dispenser is usually that will be divided into multichannel fuel oil by fuel oil all the way, respectivelyFlow to different parts (if any monomer pump engine, from refined filtration come out fuel oil all the way, be divided into multichannel through fuel dispenserFuel oil, have respectively entered in each monoblock pump), or by the multichannel oil return from different parts (such as：Fuel injector, common railPipe, the oil return of injection pump) collected by fuel dispenser for oil return all the way, uniformly return to fuel tank.Simplest fuel dispenserIt is exactly various threeways or four-way connection etc.；Relatively conventional fuel dispenser is on an oily rail or the cavity of other shapesIncrease multiple interfaces communicated with internal cavity, interface specification is not of uniform size, is connect accordingly according to the connection of each oil circuit uninterruptedMouthful；Somewhat especially the fuel dispenser of any is exactly directly processing oil pocket and and chamber on the parts such as the boss of air inlet pipe, supportThe logical multiple interfaces of body phase, fuel dispenser and other parts are become one.
Existing distributor has the disadvantage that：
1st, existing fuel dispenser simply simply will be divided into multichannel by fuel oil all the way, or multichannel fuel oil is collected for oneRoad.When the fuel pressure for entering fuel dispenser changes, flowing out each road fuel pressure of fuel dispenser also will be withChange.Such as some injection pumps (such as U.S. Si Danai DB pumps) have be distinctly claimed enter injection pump fuel pressure it is necessaryIt is maintained in a certain smaller range or maximum pressure is no more than a certain pressure value, and the only conduct of existing fuel dispenserA collecting and distributing part of fuel oil, there is no this function of control fuel pressure.It is exactly to develop and be somebody's turn to do according to existing methodThe mechanical oil transfer pump or electronics oil transfer pump that oil spout pump pressure matches.Mechanical oil transfer pump arrangement is more complicated, is related to startingA series of arrangement of parts such as wheel system, pipeline, construction cycle length, cost are high.And electronics oil transfer pump price general charged all comparesIt is expensive, and reliability is not universal high, and related pipeline etc. is also required to do corresponding arrangement.
Even if a certain steady state value the 2nd, is kept into the fuel pressure of fuel dispenser, but due to local pressure at inlet attackThe reasons such as loss, circulating direction variation can all cause actual outlet pressure and inlet pressure to be to have difference.
The information for being disclosed in the background section is merely intended to understanding of the increase to the general background of the present invention, without answeringIt has been the prior art well known to persons skilled in the art when being considered as recognizing or implying the information structure in any form.
The content of the invention
It is an object of the invention to provide a kind of simple and reasonable adjustable-pressure fuel dispenser, the pressure adjustableFormula fuel dispenser only can need to pass through rotation pressure according to the different pressures needs of different fuel system or same fuel systemAdjusting screw rod, you can realize being adjusted at any time to internal fuel pressure；And cost is cheap, assembling is also very simple, installationIt is convenient, it is simple to operate.
To achieve the above object, according to the invention provides a kind of adjustable-pressure fuel dispenser, including：DistributorBody, it has oil suction chamber and oil back chamber, and connects the drain tap of the oil suction chamber and oil back chamber, and the outer end of the oil suction chamber hasTotal oil inlet, the side of the oil suction chamber offer pressure sensor interface and multiple oil-outs；The outer end of the oil back chamber hasTotal oil return opening, the side of the oil back chamber offer plug screw fixing port and multiple oil return openings, and the plug screw fixing port has internal thread,Its lower end connects with drain tap；Regulation component, it includes：Valve element, spring, piston type spring seat, O-ring seal, plug screw and tuneScrew rod is pressed, the valve element includes the boss of mushroom head and the cylindrical type positioned at the mushroom tail end；The piston type spring seatBe arranged in the plug screw fixing port above valve element, its bottom has a spring locating slot, the spring be arranged on spring locating slot andBetween boss；The side surface circumference of the piston type spring seat is machined with O-ring seal groove, for setting O-ring seal；The workThe top of plug spring base has the first positive stop lug boss, and first positive stop lug boss offers screw rod and fixes blind hole；The plug screwCenter offers internal thread through hole, and has plug screw canned paragraph；The plug screw canned paragraph has the internal thread with plug screw fixing portIt is adapted to the external screw thread being spirally connected；The top of the screw press has nut, and middle part is to be adapted to the internal thread through hole of the plug screwThe screw rod being spirally connected, bottom and the screw rod of the screw press fix blind hole and are adapted to grafting.
Preferably, in above-mentioned technical proposal, oil suction chamber and oil back chamber laterally be arranged in parallel up and down.
Preferably, in above-mentioned technical proposal, oil-out and oil return opening are two.
Preferably, in above-mentioned technical proposal, the surface of distributor body has always to enter, oil return mark and ladder distributor are consolidatedDetermine bolt hole, and installation lug.
Preferably, in above-mentioned technical proposal, regulation component also includes：The spacer being arranged between plug screw and distributor bodyCircle.
Preferably, in above-mentioned technical proposal, the side surface circumference of piston type spring seat is machined with twice O-ring seal groove.
Preferably, in above-mentioned technical proposal, the top of screw press has the turret head nut with the second positive stop lug boss.
Preferably, in above-mentioned technical proposal, the bottom of screw press is hemispherical.
Compared with prior art, the present invention has the advantages that：The adjustable-pressure fuel dispenser being capable of basisThe different pressures of different fuel system or same fuel system need, and only need to pass through rotation pressure adjusting screw rod, you can realization pairInternal fuel pressure is adjusted at any time；And cost is cheap, assembling is also very simple, easy for installation, simple to operate.
Embodiment
Below in conjunction with the accompanying drawings, the embodiment of the present invention is described in detail, it is to be understood that the guarantor of the present inventionShield scope is not limited by embodiment.
Explicitly indicated that unless otherwise other, otherwise in entire disclosure and claims, term " comprising " or its changeChange such as "comprising" or " including " etc. and will be understood to comprise stated element or part, and do not exclude other membersPart or other parts.
As shown in Figures 1 to 4, according to the concrete structure of the adjustable-pressure fuel dispenser of the specific embodiment of the inventionIncluding：Distributor body 1 and the regulation component being arranged in the distributor body, wherein, distributor body 1 has interconnected oil-feedChamber and oil back chamber, the fuel oil after oil transfer pump pressurizes, from total oil inlet into the oil suction chamber of adjustable-pressure fuel dispenser, thenEach different parts (such as injection pump is flowed to from multiple oil-outs (can be according to the quantity for being actually needed selection processing oil-out)Oil inlet, ECU cooling chambers etc.).Oil return from different parts (such as injection pump, common rail pipe, fuel injector) is respectively from multipleOil return opening (can be according to the quantity for being actually needed selection processing oil return opening) respectively enters the oil return of adjustable-pressure fuel dispenserChamber, fuel tank is uniformly returned to by total oil return opening.Regulation component can be to the combustion in the oil suction chamber of the adjustable-pressure fuel dispenserOil pressure carries out coarse adjustment (by changing adjusting washer (disk)) and accurate adjustment (by rotating screw press) two ways and is adjusted so thatFuel pressure in the oil suction chamber can be set according to the pressure demand of place fuel system.When place fuel system is because of certain, only need to be by adjusting pressure without changing any parts when the input pressure requirement of the kind parts such as reason, oil pump changesAdjustable fuel dispenser pressure set points.Either different model engine fuel oil input pressure is required andDuring required pressure value difference, without developing a variety of adjustable-pressure fuel dispensers.Only need supporting same adjustable-pressureFuel dispenser, it is adjusted according to each type pressure requirements value, really realizes a polygamy.
Specifically, as shown in figure 5, distributor body 1 has oil suction chamber 11 and oil back chamber 12, and the oil suction chamber 11 is connectedWith the drain tap 13 of oil back chamber 12.Oil suction chamber 11 and oil back chamber 12 laterally be arranged in parallel up and down, and the inner of the two passes through drain tap13 connections, the outer end of oil suction chamber 11 have total oil inlet 14, and the side of oil suction chamber 11 offers pressure sensor interface 15 and moreIndividual oil-out 16, the fuel oil after oil transfer pump pressurizes, from total oil inlet into the oil suction chamber of adjustable-pressure fuel dispenser, thenEach different parts (such as injection pump is flowed to from multiple oil-outs (can be according to the quantity for being actually needed selection processing oil-out)Oil inlet, ECU cooling chambers etc.).Pressure sensor interface 15 is used to connect pressure gauge, big to observe the fuel pressure in oil suction chamberIt is small.The outer end of oil back chamber 12 has total oil return opening 17, and the side of oil back chamber 12 offers plug screw fixing port 18 and multiple oil return openings19, the oil return from different parts (such as injection pump, common rail pipe, fuel injector) respectively (can be according to reality from multiple oil return openingsNeed the quantity of selection processing oil return opening) oil back chamber of adjustable-pressure fuel dispenser is respectively enterd, it is unified by total oil return openingReturn to fuel tank.Total oil inlet need to be intended to big (specific size ratio is depending on actual use situation) than multiple oil-outs.Similarly,Total oil return opening need to be intended to big (specific size ratio is depending on actual use situation) than multiple oil return openings.Plug screw fixing port 18 hasThere is internal thread, lower end connects with drain tap 13, and the path of the internal thread need to be more than the external diameter under O-ring seal nature, withEnsure the smooth installation of piston type spring seat；The depth of internal thread of plug screw fixing port need to be sufficiently large, need to ensure do not assembling regulationBe not in top bottom phenomenon when plug screw is fully threaded to bottom in the case of packing ring.
The surface of distributor body 1 has always to enter, oil return identifies 111 and distributor fixed bolt hole 112, and installation lug113.Wherein always enter, oil return mark facilitates pipeline to connect；Distributor fixed bolt hole need to use shoulder hole, reduce Surface Machining faceProduct；Installation lug uses plateau form, avoids distributor from being contacted with other parts (such as body, air inlet pipe, support) stationary planeArea is excessive, phenomena such as local pressure occurs because contacting surface irregularity.
Regulation component includes：Valve element 21, spring 22, piston type spring seat 23, O-ring seal 24, adjusting washer (disk) 25, plug screw26 and screw press 27.Wherein, as shown in Figure 6 and Figure 7, valve element 21 includes mushroom head 211 and positioned at the mushroom tail endThe boss 212 of cylindrical type, mushroom head 211 are arranged in drain tap, play a part of to open and close drain tap in the course of the work.The boss 212 of cylindrical type is used for fixed spring.
As shown in Figure 8 and Figure 9, piston type spring seat 23 is arranged in the plug screw fixing port 18 of the top of valve element 21, is being workedDuring main play fixed spring and seal oil back chamber intermediate fuel oil.The bottom of piston type spring seat 23 has according to springThe spring locating slot 231 of 22 dimensioneds, spring 22 are arranged between spring locating slot 231 and the boss 212 of valve element 21；PistonThe side surface circumference of formula spring base 23 is machined with twice O-ring seal groove 232, for setting O-ring seal 24；Piston type spring seat23 top has positive stop lug boss 233, and positive stop lug boss 233 offers screw rod and fixes blind hole 234.When screw press is adjusted upward toDuring peak, it is bonded at the top of positive stop lug boss with plug screw bottom, now twice O-ring seal need to ensure in spring base mobile section 114Interior (as shown in Figure 2)；Screw press end need to be assembled to screw rod and fix in blind hole, and screw rod is fixed blind hole and matched somebody with somebody with screw rod end intervalClose, screw press end sphere fixes blind hole bottom surface under spring force with screw rod, remains fitting.
As shown in Figure 10 and Figure 11, the center of plug screw 26 offers internal thread through hole 261, and has plug screw canned paragraph 262.Screw press passes through the position of the internal thread through hole regulating piston formula spring base, so as to adjust the elastic force of spring；Plug screw canned paragraph262 with the external screw thread being spirally connected is adapted to the internal thread of plug screw fixing port 18, and adjusting washer (disk) 25 is arranged on plug screw 26 and distributorBetween body 1, plug screw canned paragraph 262 is used to fix plug screw and coordinates the replacing of adjusting washer (disk), and its length need to ensure changing pressureDuring the supporting most thick adjusting washer (disk) of adjustable fuel dispenser, plug screw reliably can be fixed on distributor body, needed simultaneouslyEnsure that plug screw is fully screwed into when without using adjusting washer (disk), occur without top bottom phenomenon.When the input pressure required for fuel systemWhen not in screw press adjustable range, it can be adjusted by changing the different adjusting washer (disk) of thickness to change the pressure of screw pressRange section.When the input pressure required for fuel system is smaller, the thicker adjusting washer (disk) of use；Required for fuel systemWhen input pressure is larger, relatively thin adjusting washer (disk) is used.Operated more than, can be achieved to change screw press adjustable range sectionBecome.
As shown in figure 12, the top of screw press 27 has the turret head nut with positive stop lug boss, convenience hand or pullsHand turns screw press；Positive stop lug boss is consistent with the positive stop lug boss function on piston type spring seat, when screw press is adjusted downwardsDuring to minimum point, the positive stop lug boss bottom end face on screw press at the top of plug screw with being bonded, and now twice O-ring seal needs to ensureIn spring base mobile section；The middle part of screw press 27 is to be adapted to the screw rod being spirally connected, pressure regulation with the internal thread through hole of the plug screwThe bottom of screw rod 27 is hemispherical, to ensure that blind via bottom binding face is fixed in screw press end with piston type spring seat screw rodArea is as few as possible, and so as to ensure screw press in rotation process, piston type spring seat is unlikely to transfer.
When the fuel pressure for entering the total oil inlet of adjustable-pressure fuel dispenser is more than system demand pressure, or because outerBoundary's factor fluctuates, and when input pressure increases suddenly, valve element moves up in the presence of oil suction chamber fuel pressure.MeanwhileThe spring force and oil back chamber intermediate fuel oil that are applied in valve element self gravitation, spring on valve element are applied to the pressure (oil return on valve elementThe pressure of chamber intermediate fuel oil only account for a minimum part, and because oil back chamber with fuel tank is that air communicates, its fuel pressure is much smaller than oil-feedPressure in chamber) in the presence of, valve element stops in a certain position.Valve element is during moving up, the part combustion in oil suction chamberOil entering, in the presence of oil back chamber pressure difference, by the gap between valve element and valve seat, flow in oil back chamber, and together with other zeroThe oil return of part returns to fuel tank through total oil return opening together, and oil suction chamber carries out pressure release.Fuel pressure in oil suction chamber is bigger, valve element toThe distance of upper movement is bigger, and the gap between valve element and valve seat is also bigger, and the fuel oil entered from oil suction chamber in oil back chamber is justIt is more.Acted by above series of, so as to which the fuel pressure ensured in oil suction chamber is maintained at a certain setup pressure value.
When the input pressure required for fuel system changes, valve element can be applied to by rotating screw press changeOn spring force size, so as to change the size of oil suction chamber intermediate fuel oil pressure.When screw press is rotated up, spring appliesSpring force on to valve element reduces, and the fuel pressure in oil suction chamber needed for valve opening accordingly reduces；Similarly, when screw press toDuring lower rotation, the spring force that spring is applied on valve element increases, and the fuel pressure in oil suction chamber needed for valve opening accordingly increases.Operate more than, in combination with the observation pressure gauge that pressure sensor interface is connected from distributor body, can be achieved to enteringThe regulation of oil pocket intermediate fuel oil pressure size.When the input pressure required for fuel system is not in screw press adjustable range,The pressure regulation spectrum section of screw press can be changed by changing the different adjusting washer (disk) of thickness.Required for fuel systemWhen input pressure is smaller, the thicker adjusting washer (disk) of use；When the input pressure required for fuel system is larger, using relatively thinAdjusting washer (disk).Operated more than, the change to screw press adjustable range section can be achieved.
Fuel pressure in the adjustable-pressure fuel dispenser oil suction chamber can be according to the pressure demand of place fuel systemSet.When place fuel system changes because of the requirement of the parts such as certain reason, oil pump input pressure, without changingAny parts, only need to be by adjusting adjustable-pressure fuel dispenser pressure set points.The adjustable-pressure fuel oil pointFuel pressure in orchestration oil suction chamber can carry out coarse adjustment (by changing adjusting washer (disk)) and accurate adjustment (by rotating screw press) twoKind mode is adjusted.Make pressure regulation spectrum more targeted, pressure regulating value is more accurate.Either different model is startedMachine requires to fuel oil input pressure and during required pressure value difference, without developing a variety of adjustable-pressure fuel distributionsDevice.Supporting same adjustable-pressure fuel dispenser is only needed, is adjusted according to each type pressure requirements value, it is really realExisting a polygamy.
To sum up, the adjustable-pressure fuel dispenser can press according to different fuel system or the different of same fuel systemPower needs, and only need to pass through rotation pressure adjusting screw rod, you can realizes being adjusted at any time to internal fuel pressure；And cost is lowHonest and clean, assembling is also very simple, easy for installation, simple to operate.
The description of the foregoing specific illustrative embodiment to the present invention is to illustrate and the purpose of illustration.These descriptionsIt is not wishing to limit the invention to disclosed precise forms, and it will be apparent that according to above-mentioned teaching, can be much changedAnd change.The purpose of selecting and describing the exemplary embodiment is that explain that the certain principles of the present invention and its reality shouldWith so that those skilled in the art can realize and utilize the present invention a variety of exemplaries andVarious chooses and changes.The scope of the present invention is intended to be limited by claims and its equivalents.