CN105143656A - Piston pump, in particular high-pressure pump for a fuel system of an internal combustion engine - Google Patents
Piston pump, in particular high-pressure pump for a fuel system of an internal combustion engine Download PDFInfo
- Publication number
- CN105143656A CN105143656A CN201480023182.2A CN201480023182A CN105143656A CN 105143656 A CN105143656 A CN 105143656A CN 201480023182 A CN201480023182 A CN 201480023182A CN 105143656 A CN105143656 A CN 105143656A
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- China
- Prior art keywords
- reciprocating pump
- housing
- housing shell
- section
- shell
- Prior art date
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- 239000000446 fuel Substances 0.000 title claims abstract description 36
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 12
- 238000004519 manufacturing process Methods 0.000 claims description 14
- 238000005520 cutting process Methods 0.000 claims description 9
- 239000012530 fluid Substances 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 6
- 238000001746 injection moulding Methods 0.000 claims description 4
- 239000000843 powder Substances 0.000 claims description 4
- 238000005495 investment casting Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 description 11
- 238000013016 damping Methods 0.000 description 7
- 238000003825 pressing Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 239000007787 solid Substances 0.000 description 4
- 239000002184 metal Substances 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000002828 fuel tank Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000035558 fertility Effects 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 239000003502 gasoline Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000010705 motor oil Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000012958 reprocessing Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
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
- F02M39/00—Arrangements of fuel-injection apparatus with respect to engines; Pump drives adapted to such arrangements
- F02M39/02—Arrangements of fuel-injection apparatus to facilitate the driving of pumps; Arrangements of fuel-injection pumps; Pump drives
-
- 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
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
- F02M59/10—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by the piston-drive
- F02M59/102—Mechanical drive, e.g. tappets or cams
-
- 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
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
- F02M59/48—Assembling; Disassembling; Replacing
-
- 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
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
- F02M2200/8046—Fuel injection apparatus manufacture, repair or assembly the manufacture involving injection moulding, e.g. of plastic or metal
-
- 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
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
- F02M2200/8053—Fuel injection apparatus manufacture, repair or assembly involving mechanical deformation of the apparatus or parts thereof
-
- 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
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
- F02M2200/8061—Fuel injection apparatus manufacture, repair or assembly involving press-fit, i.e. interference or friction fit
-
- 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
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
- F02M2200/8069—Fuel injection apparatus manufacture, repair or assembly involving removal of material from the fuel apparatus, e.g. by punching, hydro-erosion or mechanical operation
-
- 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
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
- F02M2200/8084—Fuel injection apparatus manufacture, repair or assembly involving welding or soldering
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Details Of Reciprocating Pumps (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The invention relates to a piston pump (24), in particular a high-pressure pump for a fuel system (10) of an internal combustion engine, having an inner housing core (46) to which a cylinder liner (32) is fastened, and having an outer housing shell (50) which surrounds the inner housing core (46) at least in sections from the radial outside. According to the invention, at least one radially projecting edge section (52) of the outer housing shell (50) forms part of a fastening flange (74) with which the piston pump (24) can be fastened to the attachment structure.
Description
Technical field
The present invention relates to a kind of reciprocating pump as described in the preamble according to claim 1.
Background technique
Be well known that the fuel system for internal-combustion engine by market, described internal-combustion engine has high-pressure fuel pump etc., fuel quantity required separately can be transported in fuel storage device or fuel distributor under the pressure expected separately by means of described high-pressure fuel pump.Such as this high-pressure fuel pump is configured to reciprocating pump.At this, rotary motion is made to convert stroke motion to by being radially placed on camshaft or trunnion shaft.By piston stroke, fuel can be compressed and is transported to the high pressure side of high-pressure fuel pump or fuel system in the active chamber of reciprocating pump.The primary component of usual this high-pressure fuel pump with solid configuration manufacture, wherein, needs corresponding large materials'use amount and reciprocating pump has the relatively high weight of total when using working angles and/or forging process.
Summary of the invention
The problem to be solved in the present invention is solved by reciprocating pump according to claim 1.Favourable further scheme provides in the dependent claims.In addition, can obtain in the accompanying drawings for the present invention important feature in following explanation, wherein, described feature can individually but also with different combinations be not only important for the present invention, after this need not again indicate clearly.
The advantage that the present invention has is, can reduce the weight of the high-pressure fuel pump being configured to reciprocating pump and reduce cost of material and manufacture cost.Particularly can reduce quantity of material in the following region of reciprocating pump, described region is unessential for the function of reciprocating pump and is not crucial for intensity.The element constructed of reciprocating pump, such as housing core preferably (only) are used in the high-pressure area of reciprocating pump solidly.Correspondingly, the element of relative thin-walled can be used in area of low pressure.Meanwhile, functional advantage can be obtained in reciprocating pump runs by above measure.Can also reduce the quantity of the element of reciprocating pump, wherein, fastening flange and the lid of reciprocating pump are integrated in outside housing shell.This can preferably realize on single type ground.
In addition, reciprocating pump according to the present invention has relatively large chamber portion section, is in operation with chamber portion section described in filling fuels.Therefore achieve, element or the fluid mass of reciprocating pump inside hydraulically connect each other better.This relates to " damping cavity " and " step chamber " and the hydraulic connecting with flow control valve of such as so-called reciprocating pump.At this, the better filling of the less suction loss of reciprocating pump and the active chamber of reciprocating pump can be realized.Therefore, avoid and form steam in reciprocating pump inside, can realize thus reducing the stuck danger of piston erosion.If desired, the precompressed according to reciprocating pump of the present invention can be reduced.In addition, the housing shell of reciprocating pump or outside surrounds relatively large fuel space, therefore, and can the hydraulic impulse of damping in the area of low pressure of reciprocating pump better.
In addition, be in operation the piston and cylinder sleeve that achieve and heat reciprocating pump substantially equably and rapidly, because cylinder sleeve has joint section that is relatively little or small size compared with the remaining element of reciprocating pump.Therefore the tendency reducing seizure of piston is achieved equally.In addition, can manufacture with the less cutting expended according to reciprocating pump of the present invention.The element particularly in area of low pressure of reciprocating pump can be configured to the turning part that relatively simply manufactures or steel plate deep drawing part.According to the present invention, this element can be " customer interface " equally, and reciprocating pump can such as be assemblied in " attachment structure " of internal-combustion engine by means of described customer interface.
The present invention relates to a kind of reciprocating pump, high-pressure service pump especially for the fuel system of internal-combustion engine, it has inner housing core and outside housing shell, the housing core of described inside is fixed a cylinder sleeve, and (this comprises, namely inner housing core forms cylinder sleeve), the housing shell of described outside at least wraps up the housing core of described inside in section ground in portion's from radially outer.According to the present invention, at least one radial outstanding edge segments of outside housing shell forms the parts of fastening flange, utilizes described fastening flange reciprocating pump can be fixed on attachment structure.In this way, the parts being configured to entirety at least partially of outside housing shell and fastening flange.Therefore, decrease the quantity of reciprocating pump, simplify manufacture and reduce cost.In addition, tubing doses can be reduced.Inner housing core such as can be manufactured by blank, and described blank only needs 1/4th of the quantity of material of comparable traditional element.
Arrange in a configuration of reciprocating pump, radial outstanding edge segments is independent parts and with the housing department section pressing of housing shell and/or weld.Therefore achieve, radial outstanding edge segments, housing shell in this i.e. fastening flange and outside are made up of different materials and/or are configured to have the different strengths of materials, thus these two elements can be optimum for self respectively.Therefore particularly can improve the rigidity of fastening flange, hence improve the function of reciprocating pump.
In addition can arrange, housing shell has fixing part section, and described fixing part section fixes O-ring seals and/or at axial external stability piston spring at inner radial fixed piston seal arrangement and/or at radially outer.Therefore in a straightforward manner, outside housing shell may be used for other elements of fixed displacement pump, thus can cancel fixing device independent accordingly.The piston sealing device radially outward surrounding piston can the active chamber of outside packed-piston pump.O-ring seals achieves, generally relative to the outward opening packed-piston pump of attachment structure or attachment structure.Piston spring reacts on the power acted in portion's section of the side of piston.Therefore, overall simplified reciprocating pump and reduce its price.
Particularly can arrange, fixing part section be independent parts and axially or to be radially welded in the shell part of housing shell and/or with the shell part of described housing shell axially or radially pressing.Therefore such as achieve, fixing part section is configured to have the other strength of materials.Therefore, fixing part section specifically its corresponding function matches, and therefore, improves reciprocating pump generally and saves weight and material and finally provide cost savings.
In one of reciprocating pump other configuration, outside housing shell is at least in part by means of plastic deformation, particularly manufacture by means of deep drawn.Therefore, can very simply and simultaneously manufacture housing shell inexpensively.
In addition can arrange, at least one the chamber portion section on the one hand between the housing shell of described outside and the housing core of on the other hand described inside, construct at least one fluid chamber be connected with low-voltage interface.Therefore, the fuel space existed in reciprocating pump inside can be increased, can be implemented in the pulse damped of the improvement in reciprocating pump or fuel system thus.
In one of reciprocating pump other configuration, inner housing core at least portion's section is configured to substantially columned or is configured to flat bar, and wherein, the axes normal of described cylindrical body or flat bar is arranged in the longitudinal axis of reciprocating pump.Inner housing core is such as configured to solid component substantially, and described component produces by means of cutting reprocessing the shape expected separately.Preferably, be arranged on the side of cylindrical body or flat bar according to the transfer valve of reciprocating pump of the present invention and expulsion valve.In addition, the cylinder sleeve of reciprocating pump can be arranged in described cylindrical body or flat bar at least in part.At this, cylinder sleeve is such as perpendicular to the axis arranged of cylindrical body or flat bar.By the preferably solid configuration of cylindrical body or flat bar, described cylindrical body or flat bar are particularly suitable for high material pressure.Columniform shape self can be conducive to assembling transfer valve and expulsion valve.
In one of reciprocating pump instead configuration, inner housing core construct is columniform dish, and wherein, the axis being parallel of described columniform dish is arranged in the longitudinal axis of reciprocating pump.Therefore particularly achieve, the hydraulic interface of reciprocating pump can be arranged with the angle determined relative to the longitudinal axis of reciprocating pump.At this, can relatively at random selected angle in structure.The housing core of the inside of such structure can especially simply be arranged in enduringly outside housing shell inner radial portion's section on or to be connected with portion's section of this inner radial.Therefore, the robustness according to reciprocating pump of the present invention can be improved.
In addition can arrange, inner housing core constructs by means of cutting.Can say so, inner housing core is the core parts according to reciprocating pump of the present invention.Therefore, specifically can process inner housing core by means of cutting, the connection with the residue element of reciprocating pump can be improved thus.
When the housing core of inside utilize metal powder injection molding (English is MIM, " metalinjectionmolding ") method or when constructing by means of precision casting, the cost manufacturing reciprocating pump can be reduced.Therefore, the quantity of the process step of the housing core for the manufacture of inside can be reduced, can cost advantage be realized thus.
In one of reciprocating pump other configuration, housing department section essential structure in the plane of the longitudinal axis perpendicular to reciprocating pump of outside housing shell is the polygonal of radial symmetric.Therefore, outside housing housing department section ground has smooth face, and the hydraulic interface of reciprocating pump can very well be arranged on this face.Described polygonal can be such as Hexagon.
Accompanying drawing explanation
Below with reference to the accompanying drawings exemplary mode of execution of the present invention is described.In accompanying drawing:
Fig. 1 illustrates the sketch of the fuel system for internal-combustion engine;
Fig. 2 illustrates the partial longitudinal section of dissecting for the first mode of execution of the reciprocating pump of the fuel system of Fig. 1;
Fig. 3 illustrates the partial section of the straight line III-III along Fig. 2;
Fig. 4 illustrates the view being similar to Fig. 2 of the second mode of execution of reciprocating pump;
Fig. 5 illustrates the partial section of the straight line V-V along Fig. 4;
Fig. 6 illustrates the view being similar to Fig. 2 of the 3rd mode of execution of reciprocating pump;
Fig. 7 illustrates the partial section of the straight line VII-VII along Fig. 6, and wherein, flow control valve and outlet connection are arranged with the angle of 120 °;
Fig. 8 shows the side view with the external casing shell being configured to almost circular cross-sectional outer of the reciprocating pump of Fig. 2 to 6;
Fig. 9 illustrates the sectional view of the straight line IX-IX along Fig. 8;
Figure 10 illustrates the side view of second mode of execution with the external casing shell being configured to substantially hexagonal cross-sectional outer;
Figure 11 illustrates the sectional view of the straight line XI-XI along Figure 10;
Figure 12 illustrates the longitudinal section of the 3rd mode of execution with the external casing shell being configured to the fastening flange clamped of dissecting;
Figure 13 illustrates the longitudinal section of the 4th mode of execution of reciprocating pump of dissecting; With
Figure 14 illustrates the view being similar to Fig. 2 of the 5th mode of execution of reciprocating pump.
For the element identical for function and parameter, also use identical reference character in various embodiments in all of the figs.
Embodiment
Fig. 1 illustrates the fuel system 10 for a unshowned internal-combustion engine with the view greatly simplified.Fuel flows to high-pressure fuel pump through low pressure line 18 through the flow control valve 22 that can be manipulated by electromagnetism control device 20 (" calutron ") by means of pre-transfer pump 16 through aspiration 14 from fuel tank 12, and described high-pressure fuel pump is at hereinafter referred to as reciprocating pump 24.Reciprocating pump 24 is connected by pressure duct 26 and high pressure accumulator 28 (" CommonRail, high-pressure common rail ") in downstream.
In addition, schematically show cylinder sleeve 32 in Fig. 1, be arranged in the cam disk 40 of piston 30 on cylinder sleeve 32 and the active chamber 25 surrounded by cylinder sleeve 32 and the axial end portion section 38 that acts on piston 30.The valve of other elements, such as reciprocating pump 24 is not shown in FIG.Electromagnetism control device 20 is controlled by control and/or controlling device 42.
Will be understood that, flow control valve 22 also can be configured to the element of construction with reciprocating pump 24, such as, also shown in following Fig. 2 to 5.Flow control valve 22 can be such as reciprocating pump 24 can the transfer valve of enforced opening.
In fuel delivery means 10 runs, fuel is transported to low pressure line 18 from fuel tank 12 by pre-transfer pump 16.The corresponding requirement of based on fuel can be closed and turn-on flow rate control valve 22.Therefore, the fuel quantity be transported in high pressure accumulator 28 is affected.Fuel is such as gasoline or diesel oil.
Fig. 2 illustrates the first mode of execution of the reciprocating pump 24 for fuel system 10 of Fig. 1 with longitudinal section.Reciprocating pump 24 is symmetrically arranged at least partly about longitudinal axis 44 vertical in the view.Reciprocating pump 24 has inner solid housing core 46 in the zone line of view, and described housing core constructs about longitudinal axis 48 substantially cylindrical arranged perpendicular to longitudinal axis 44.
In addition, reciprocating pump 24 has the external casing shell 50 of the thin-walled being configured to basic can-like, and the housing shell of described outside wraps up the housing core 46 of described inside on the other hand from radially outer.To be manufactured by means of cutting by solid material according to the housing core 46 of the inside of the reciprocating pump 24 of Fig. 2 and with portion's section hydraulic seal of the inner radial of the housing shell 50 of outside be connected.Therefore, inner housing core 46 and outside housing shell 50 form a housing (without reference character) jointly, and other elements of reciprocating pump 24 and/or housing parts are arranged on the housing, such as, also further illustrate below.Preferably, inner housing core 46 and outside housing shell 50 pressing and/or welding each other.
Edge segments 52 radial direction of the bottom in the view of outside housing shell 50 bends a little outwardly wavyly.As in Fig. 3 also illustratively, the edge segments 52 that the radial direction of outside housing shell 50 is given prominence to is a part for fastening flange 74 on the position of two diametrically contrapositions simultaneously, utilizes described fastening flange reciprocating pump 24 can be fixed on attachment structure (not shown).Attachment structure is such as the cylinder head of internal-combustion engine.
Top in the view, input adapter 54 to be arranged on outside housing shell 50 and Fluid Sealing be connected with the housing shell 50 of outside.Input adapter 54 symmetrically constructs relative to the longitudinal axis 44 of reciprocating pump 24 or arranges.Pressure damper 56, in this case diaphragm pressure damper is surrounded in portion's section on the top in the view of the housing shell 50 of described input adapter in outside.
Inner housing core 46 has the first step hole (without reference character) coaxial with longitudinal axis 48 or the second step hole (without reference character), these two step holes are led in the blind hole (without reference character) coaxial with longitudinal axis 44, and cylinder sleeve 32 is pressed in described blind hole.Portion's section of outlet connection 60 is arranged in the first hole (in the view left part) in inner housing core 46, and expulsion valve is integrated in this section.Portion's section of flow control valve 22 is arranged in the second hole (in the view right part).Outlet connection 60 is hydraulically connected with pressure duct 26 (see Fig. 1).Preferably, flow control valve 22 and outlet connection 60 to be pressed in inner housing core 46 place or the hole described in press-in and to be welded on this hole.In portion's section on top in the view, cylinder sleeve 32 has radial opening 32a or 32b, and described opening makes the active chamber 25 formed in cylinder sleeve 32 hydraulically be connected with outlet connection 60 or with the exhaust port of flow control valve 22.
The chamber portion section be present between the housing shell 50 of the described on the one hand outside in the region of pressure damper 56 and the housing core 46 of the described inside of another aspect forms so-called damping cavity 62 (" fluid chamber "), described damping cavity is hydraulically connected with low-voltage interface 58, and described low-voltage interface can be connected with low pressure line 18.The chamber portion section that the bottom of the housing core 46 in the view in inside exists forms so-called step chamber 63.Inner housing core 46 has radial hole 57a and 57b in the axial end portion section of flow control valve 22, and the hole of described radial direction makes the inlet opening of flow control valve 22 hydraulically be connected with damping cavity 62 and with step chamber 63.
The fixing part section 65 of multi-part type be arranged in outside housing shell 50 in the end segments of the view middle and lower part of Fig. 2.At this, the fixing part section 65 of multi-part type comprises the first fixing part section being configured to seal carrier 64.Be configured to the second fixing part section of seal holder 66 and the fixing part section 68 of inside.The fixing part section 68 of seal carrier 64, seal holder 66 and inside substantially symmetrically constructs about longitudinal axis 44 equally respectively.The fixing part section 65 of multi-part type is the parts of " customer interface ", and reciprocating pump 24 can be received in above-cited attachment structure by means of described customer interface.
At this, the fixing part section 68 of seal carrier 64, seal holder 66 and inside to be got off structure using the situation of bending steel plate (deep drawing part) that is that draw or punching press.Because described element defines the border in the step chamber 63 with relatively low hydraulic pressure, so described element is configured to relative thin and light.Element described in three contact with each other at least in couples or at least in part with paired soil fertility ordinatedly or material fit be connected to each other.Seal holder 66 is particularly configured to packing ring in the region of inner radial, and wherein, portion's section of seal carrier 64 and portion's section of inner fixing part section 68 project through the hole of the center arrangement at seal holder 66.
Seal carrier 64 around radially inner punch in arrange a housing seal circle 70 being configured to O-ring seals at this.At this, seal carrier 64 around punch and the edge segments of radially outer of seal holder 66 jointly form a radial ring around groove, be kept in the cell to housing seal circle 70 form fit.Seal carrier 64 is connected with the end segments Fluid Sealing ground of the bottom in fig. 2 of outside housing shell 50, welds at this.
In the lower area of Fig. 2, arrange that is configured to a helical spring piston spring 72 concentrically with longitudinal axis 44.At this, the end segments on the top in the view of piston spring 72 axially abuts in flange shape portion's section of radial direction extension of seal holder 66, and therefore, described seal holder is also configured for the bearing of piston spring 72.The end segments of the bottom in the view of piston spring 72 axially abuts on spring seat 73, described spring seat in the end segments of the bottom in the view of piston 30 power ordinatedly or material fit be connected with described piston.
The piston 30 of single type ground structure has two diameters (without reference character) substantially.In the axial central region of piston 30, piston 30 has relatively large diameter, and this diameter is substantially corresponding to the inner diameter of cylinder sleeve 32.In the end segments towards active chamber 25 and in the end segments of the bottom in the view of piston 30, described piston has a diameter reduced respectively.The end segments of the bottom of piston 30 is radially surrounded by the piston sealing body 76 kept by seal carrier 64, thus can stop or at least reduce fuel and to leak into attachment structure from reciprocating pump 24 or flowing medium (such as engine oil) leaks into reciprocating pump 24 from attachment structure on the contrary.
In the operation of reciprocating pump 24, according to the hydraulic pressure of piston 30 and axial motion or position and according to the state of flow control valve 22 and the state of expulsion valve, first fuel to flow to damping cavity 62 through input adapter 54 from low pressure line 18 and then flow to the inlet opening of flow control valve 22 through radial hole 57a and 57b and then flow into active chamber 25.Equally according to the hydraulic pressure of piston 30 and axial motion or position and according to the state of flow control valve 22 and the state of expulsion valve, fuel can be transported to pressure duct 26 from active chamber 25 under stress.
Particularly can see in figure 3, the edge segments 52 that the radial direction of outside housing shell 50 is outstanding is configured to fastening flange 74.In order to be fixed on the attachment structure of internal-combustion engine by reciprocating pump 24, fastening flange 74 has two circular holes 77, and bolt (not shown) can be inserted through described hole.Fastening flange 74 is connected with seal carrier 64 Fluid Sealing ground, in this case welds.Therefore, the mechanical stability of fastening flange 74 is additionally improved.
Fig. 4 illustrates the second mode of execution of reciprocating pump 24.Below particularly the mode of execution of explanatory drawing 4 relative to the difference of Fig. 2.Inner shell core 46 according to the reciprocating pump 24 of Fig. 4 particularly utilizes the method for metal powder injection molding to manufacture.In the mode that can contrast, inner housing core 46 alternatively also constructs by means of precision casting.
The end segments of the bottom in the diagram of inner housing core 46 and longitudinal axis 44 mold the radial flange (without reference character) surrounding piston 30 coaxially.At this, form cylinder sleeve 32 by means of described flange, wherein, guide openings is out processed by cutting in the usual manner.That is, independent cylinder sleeve 32 is not needed in the embodiment according to figure 4.
The view of composition graphs 4 is seen from Fig. 5, and inner housing core 46 constructs compact especially.Therefore, housing core 46 for inside is achieved generally and thus for the little especially structure space of reciprocating pump 24 or weight little especially.The reciprocating pump 24 of few component can be there is by metal powder injection molding, wherein, eliminate or reduce cutting cost.
Fig. 6 and 7 illustrates the 3rd mode of execution comprising modification of reciprocating pump 24 jointly.Substantially be configured to columniform dish 82 according to the housing core 46 of the inside of Fig. 6 and 7, wherein, the axis of columniform dish 82 and the longitudinal axis 44 of reciprocating pump 24 are arranged coaxially at this abreast, even.Relative to the configuration of the housing core 46 of the inside according to Fig. 2, columniform dish 82 manufactures by means of cutting.
Fig. 7 is similar to the longitudinal section view that reciprocating pump 24 is shown according to the plan view of the view of Fig. 6.At this however be different from Fig. 6 ground, flow control valve 22 and outlet connection 60 are arranged with an angle 86 each other.Angle 86 radial direction is determined about longitudinal axis 44 and in this case 120 degree.
In addition, the flattened portion 88 of the radially outer of columniform dish can be seen in Fig. 7.At this, flattened portion 88 achieves the hydraulic connecting between damping cavity 62 and step chamber 63.In addition, hole 57c and 57d of two radial directions constructed perpendicular to hole 57a and 57b (Fig. 6) of radial direction respectively can be seen in Fig. 7.
Can see, angle 86 also can have the numerical value being different from 120 degree in relatively large boundary.This is particularly realized by the housing core 46 of the inside configuration as columniform dish 82.
Fig. 8 and 9 illustrates a mode of execution with the external casing shell 50 being configured to almost circular cross-sectional outer of reciprocating pump 24 jointly.Relative to the mode of execution according to Fig. 2 to 7, the edge segments 52 that the radial direction of outside housing shell 50 is outstanding is configured to fastening flange 74.The region that two radial directions of the housing shell 50 of described fastening flange in outside are arranged relative to one another have two flattened portions 90.Flattened portion 90 particularly achieves to be arranged the housing core 46 of inside and flow control valve 22 and outlet connection 60 definitely or is assemblied on outside housing shell 50.
What Figure 10 and 11 illustrated reciprocating pump 24 jointly has the other mode of execution of of the external casing shell 50 being configured to substantially hexagonal cross-sectional outer.Can say that self achieves the flattened portion 90 (see Fig. 8 and 9) for arranging needed for flow control valve 22 and outlet connection 60 by hexagonal side at this.At other of reciprocating pump 24 in this unshowned mode of execution, outside housing shell 50 is configured to the polygonal of radial symmetric, makes quadrilateral, pentagon or Octagon especially.
What Figure 12 illustrated reciprocating pump 24 has the other mode of execution of of external casing shell 50 that is configured to the fastening flange 74 clamped.In fig. 12, fastening flange 74 be independent parts and with being configured to diametrically short, radial outstanding edge segments 52 at this and being connected rigidly of the housing shell 50 of outside, such as also can illustrate further below.Addedly, seal carrier 64 is arranged in portion's section of the inner radial of bottom in the view of outside housing shell 50 in the mode of execution changed about aforesaid accompanying drawing.
Both outside housing shell 50 and seal carrier 64 substantially symmetrically or radially symmetrically construct to 44 relative to longitudinal shaft.At this, seal carrier 64 has the flange 94 axially projected upwards in the view, and described seal carrier is connected with outside housing shell 50 with described flange.As in Fig. 2 to 11 also in fig. 12, outside housing shell 50 and same seal carrier 64 are at least in part by plastic deformation, particularly manufacture by means of deep drawn.
For simple and clear object, other elements of reciprocating pump 24 are not together shown in Figure 12.Preferably realize like this manufacturing the element shown in Figure 12, in a first step, fastening flange 74 connects 96 by means of pressing and connects in the housing department section of radially outer in the bottom in the view of the housing shell 50 of outside.In the second step, the radial ring between portion's section of the inner radial of the edge segments 52 that the radial direction then setting up outside housing shell 50 is from below given prominence to and fastening flange 74 around be welded to connect 98.
Seal carrier 64 can be connected with the housing shell 50 of outside in a similar fashion.At this in a first step, portion's section pressing of the flange 94 given prominence to of the axis of seal carrier 64 and the inner radial of bottom in the view of outside housing shell 50.In the second step, then additionally by means of preferably radial ring around the pressing of guaranteeing to set up like this that is welded to connect connect.Have the circular open 100 relative to longitudinal axis 44 centering in the region of seal carrier 64 bottom in the view, piston 30 can project through described circular open (not shown).
Figure 13 illustrates the 4th mode of execution of reciprocating pump 24.At this, fastening flange 74 is similar to Fig. 2 to 11 ground and is substantially made up of the edge segments 52 that the radial direction of the housing shell 50 of outside is outstanding.At this, seal carrier 64 is connected with the end segments of the axis of the bottom in the view of outside housing shell 50, for this reason, radial edge segments 52 of giving prominence to have additional around punch, refer to view.Preferably, described connection by means of welding, such as by means of radial ring around as realized with the I shape weld seam shown in arrow 101 or fillet weld in Figure 13.Alternatively, the connection between the housing shell 50 of seal carrier 64 and outside also can by means of thoroughly welding realization.
Figure 14 illustrates the 5th mode of execution of reciprocating pump 24.At this, seal carrier 64 is similar to Figure 12 and has the flange 94 axially projected upwards in the view, and described seal carrier is by means of the joint area of described flange with the inner radial of the axial end portion section of outside housing shell 50.Preferably, be connected to described in the first manufacturing step and realized by pressing and additionally guaranteed by means of weld seam in the second manufacturing step.At this, weld seam is such as I shape weld seam.Relative to Figure 13, it also can be weldering.Connection between outside housing shell 50 and seal carrier 64 is illustrated by arrow 102 in fig. 14.
Claims (11)
1. a reciprocating pump (24), especially for the high-pressure service pump of the fuel system (10) of internal-combustion engine, it has inner housing core (46) and outside housing shell (50), the housing core of described inside is fixed a cylinder sleeve (32), the housing shell of described outside at least wraps up the housing core (46) of described inside in section ground in portion's from radially outer, it is characterized in that, at least one radial outstanding edge segments (52) of the housing shell (50) of described outside forms a fastening flange (74) at least partially, utilize described fastening flange described reciprocating pump (24) can be fixed on an attachment structure.
2. reciprocating pump according to claim 1 (24), is characterized in that, the edge segments (52) that described radial direction is outstanding is independent parts and crimps with the housing department section of described housing shell (50) and/or weld.
3. reciprocating pump according to claim 1 and 2 (24), it is characterized in that, described housing shell (50) has fixing part section (65), and described fixing part section is fixed a piston sealing device (76) in inner radial and/or fixed an O shape seal arrangement (70) and/or axial external stability one piston spring (72) at radially outer.
4. reciprocating pump according to claim 3 (24), it is characterized in that, described fixing part section (65) is independent parts and axially or is radially welded in the shell part of described housing shell (50) and/or with the described shell part of described housing shell axially or radially to crimp.
5. the reciprocating pump (24) according to item at least one in aforementioned claim, is characterized in that, the housing shell (50) of described outside is at least in part by means of plastic deformation, particularly manufacture by means of deep drawn.
6. the reciprocating pump (24) according to item at least one in aforementioned claim, it is characterized in that, at least one the chamber portion section on the one hand between the housing shell (50) of described outside and the housing core (46) of on the other hand described inside, form at least one fluid chamber (62) be connected with a low-voltage interface (58).
7. the reciprocating pump (24) according to item at least one in aforementioned claim, it is characterized in that, the housing core (46) of described inside at least portion's section is configured to substantially tubular or is configured to flat bar, wherein, the axis (48) of described cylindrical body or described flat bar is arranged perpendicular to the longitudinal axis (44) of described reciprocating pump (24).
8. the reciprocating pump (24) according to item at least one in claim 1 to 6, it is characterized in that, the housing core (46) of described inside is configured to columniform dish (82), wherein, the longitudinal axis (44) of the axis being parallel of described columniform dish (82) in described reciprocating pump (24) is arranged.
9. the reciprocating pump (24) according to item at least one in aforementioned claim, is characterized in that, the housing core (46) of described inside constructs by means of cutting.
10. the reciprocating pump (24) according to item at least one in claim 1 to 8, is characterized in that, the housing core (46) of described inside utilizes metallic powder injection moulding process or constructs by means of precision casting.
11. reciprocating pumps (24) according to item at least one in aforementioned claim, it is characterized in that, housing department section essential structure in the plane of the longitudinal axis (44) perpendicular to described reciprocating pump (24) of the housing shell (50) of described outside is the polygonal of radial symmetric.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE201310207393 DE102013207393A1 (en) | 2013-04-24 | 2013-04-24 | Piston pump, in particular high-pressure pump for a fuel system for an internal combustion engine |
| DE102013207393.3 | 2013-04-24 | ||
| PCT/EP2014/056043 WO2014173603A1 (en) | 2013-04-24 | 2014-03-26 | Piston pump, in particular high-pressure pump for a fuel system for an internal combustion engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105143656A true CN105143656A (en) | 2015-12-09 |
Family
ID=50389430
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201480023182.2A Pending CN105143656A (en) | 2013-04-24 | 2014-03-26 | Piston pump, in particular high-pressure pump for a fuel system of an internal combustion engine |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP2989316B1 (en) |
| KR (1) | KR20160002824A (en) |
| CN (1) | CN105143656A (en) |
| DE (1) | DE102013207393A1 (en) |
| WO (1) | WO2014173603A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106795845A (en) * | 2014-10-21 | 2017-05-31 | 德尔福国际业务卢森堡公司 | Pumping mechanism |
| CN110700979A (en) * | 2018-07-09 | 2020-01-17 | 罗伯特·博世有限公司 | Pressure damper for a fuel high-pressure pump and fuel high-pressure pump for an internal combustion engine |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102016204128A1 (en) | 2016-03-14 | 2017-09-14 | Robert Bosch Gmbh | high pressure pump |
| DE102016212469A1 (en) | 2016-07-08 | 2018-01-11 | Robert Bosch Gmbh | Method for producing a high-pressure fuel pump |
| DE102021214628A1 (en) * | 2021-12-17 | 2023-06-22 | Robert Bosch Gesellschaft mit beschränkter Haftung | High pressure pump for a fuel system of an internal combustion engine |
| GB2626767A (en) * | 2023-02-02 | 2024-08-07 | Phinia Delphi Luxembourg Sarl | Pump-flange assembly process |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090044783A1 (en) * | 2007-08-17 | 2009-02-19 | Michael Fischer | Fuel pump for a fuel system of an internal combustion engine |
| JP2011001865A (en) * | 2009-06-18 | 2011-01-06 | Hitachi Automotive Systems Ltd | High pressure fuel supply pump |
| EP1671031B1 (en) * | 2003-10-01 | 2011-04-06 | Robert Bosch Gmbh | Fluid pump, particularly high-pressure fuel pump |
| WO2013018129A1 (en) * | 2011-08-01 | 2013-02-07 | トヨタ自動車株式会社 | Fuel pump |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1714236A (en) * | 2003-01-09 | 2005-12-28 | 株式会社博世汽车系统 | Fuel supply pump |
| CN100587252C (en) * | 2005-09-29 | 2010-02-03 | 株式会社电装 | Fluid pump having plunger and method of monoblock casting for housing of the same |
| JP2010037997A (en) * | 2008-08-01 | 2010-02-18 | Denso Corp | Fuel supply pump |
| FI124006B (en) * | 2011-09-30 | 2014-01-31 | Waertsilae Finland Oy | Fuel injection pump arrangement and method for operating an internal combustion engine |
-
2013
- 2013-04-24 DE DE201310207393 patent/DE102013207393A1/en not_active Withdrawn
-
2014
- 2014-03-26 WO PCT/EP2014/056043 patent/WO2014173603A1/en active Application Filing
- 2014-03-26 KR KR1020157030605A patent/KR20160002824A/en not_active Application Discontinuation
- 2014-03-26 EP EP14713093.4A patent/EP2989316B1/en active Active
- 2014-03-26 CN CN201480023182.2A patent/CN105143656A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1671031B1 (en) * | 2003-10-01 | 2011-04-06 | Robert Bosch Gmbh | Fluid pump, particularly high-pressure fuel pump |
| US20090044783A1 (en) * | 2007-08-17 | 2009-02-19 | Michael Fischer | Fuel pump for a fuel system of an internal combustion engine |
| JP2011001865A (en) * | 2009-06-18 | 2011-01-06 | Hitachi Automotive Systems Ltd | High pressure fuel supply pump |
| WO2013018129A1 (en) * | 2011-08-01 | 2013-02-07 | トヨタ自動車株式会社 | Fuel pump |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106795845A (en) * | 2014-10-21 | 2017-05-31 | 德尔福国际业务卢森堡公司 | Pumping mechanism |
| CN106795845B (en) * | 2014-10-21 | 2020-04-17 | 德尔福国际业务卢森堡公司 | Pumping mechanism |
| CN110700979A (en) * | 2018-07-09 | 2020-01-17 | 罗伯特·博世有限公司 | Pressure damper for a fuel high-pressure pump and fuel high-pressure pump for an internal combustion engine |
| CN110700979B (en) * | 2018-07-09 | 2023-01-24 | 罗伯特·博世有限公司 | Pressure damper for a fuel high-pressure pump and fuel high-pressure pump for an internal combustion engine |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20160002824A (en) | 2016-01-08 |
| DE102013207393A1 (en) | 2014-10-30 |
| EP2989316A1 (en) | 2016-03-02 |
| EP2989316B1 (en) | 2017-05-24 |
| WO2014173603A1 (en) | 2014-10-30 |
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Application publication date: 20151209 |
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