EP3189227B1 - Kraftstoffhochdruckpumpe, insbesondere für eine kraftstoffeinspritzeinrichtung einer brennkraftmaschine - Google Patents
Kraftstoffhochdruckpumpe, insbesondere für eine kraftstoffeinspritzeinrichtung einer brennkraftmaschine Download PDFInfo
- Publication number
- EP3189227B1 EP3189227B1 EP15738071.8A EP15738071A EP3189227B1 EP 3189227 B1 EP3189227 B1 EP 3189227B1 EP 15738071 A EP15738071 A EP 15738071A EP 3189227 B1 EP3189227 B1 EP 3189227B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pump
- chamber
- cylinder bore
- fuel
- feed line
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000000446 fuel Substances 0.000 title claims description 49
- 238000002485 combustion reaction Methods 0.000 title claims description 7
- 238000002347 injection Methods 0.000 title claims description 5
- 239000007924 injection Substances 0.000 title claims description 5
- 238000007789 sealing Methods 0.000 claims description 35
- 239000010687 lubricating oil Substances 0.000 description 5
- 230000002093 peripheral effect Effects 0.000 description 4
- 238000001816 cooling Methods 0.000 description 2
- 239000002828 fuel tank Substances 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Images
Classifications
-
- 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
- F02M59/442—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 means preventing fuel leakage around pump plunger, e.g. fluid barriers
-
- 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
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/0012—Valves
- F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
- F02M63/0054—Check 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
- F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
- F04B1/0404—Details or component parts
- F04B1/0452—Distribution members, e.g. 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
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/90—Selection of particular materials
- F02M2200/9015—Elastomeric or plastic materials
Definitions
- the invention relates to a high-pressure fuel pump, in particular for a fuel injection device of an internal combustion engine according to the preamble of claim 1.
- Such a high-pressure fuel pump and a fuel injection device is characterized by the DE 10 2012 218 552 A1 known.
- This high-pressure fuel pump has at least one pump element, which in turn has a pump piston driven in a stroke movement.
- the pump piston is slidably guided in a cylinder bore of a housing part of the pump and delimited in the cylinder bore a pump working space, wherein an inlet valve is provided, through which the pump working space is connectable to a fuel inlet.
- the pump piston projects with its end facing away from the pump working space out of the pump working RAM remote from the end of the cylinder bore.
- a sealing ring is provided on the protruding from the cylinder bore end portion of the pump piston.
- the sealing ring serves to avoid mixing of the fuel pumped by the pump piston with the medium present outside the cylinder bore of the housing part.
- the medium present outside the cylinder bore of the housing part is in particular lubricating oil for lubricating a drive region, for example a roller tappet and its support on a cam.
- the sealing ring has on its inner circumference at least one sealing lip, with which it bears against the pump piston.
- the sealing ring is in a surrounding of the cylinder bore end region of the pump piston receptacle of the Pump housing part arranged. Between the sealing ring and the pump housing part, a space is limited to the cylinder bore, which is separated from the sealing ring by a portion of the pump housing part.
- the space is connected to a fuel delivery port to the intake valve with the fuel delivery passage passing through the space.
- An inlet section of the fuel delivery inlet leading from a feed pump opens into a first peripheral area of the room and a second inlet section of the fuel feed inlet discharging from the room leads away from a second peripheral area of the room deviating from the first peripheral area.
- the high-pressure fuel pump according to the invention with the features of claim 1 has the advantage that the thermal load of the sealing ring is further reduced, since the space is constantly flowed through by the bypass connection of fuel, which flows into the discharge area, regardless of the fuel delivery of the pump element.
- FIG. 1 a pump in a longitudinal section
- FIG. 2 one in FIG. 1 With II designated section of the pump in an enlarged view.
- FIG. 1 is shown in a simplified representation of a pump, which is in particular a high-pressure fuel pump for a fuel injection device of an internal combustion engine.
- the high-pressure fuel pump has at least one pump element 10, which in turn has a pump piston 12 which is driven at least indirectly by a drive shaft 14 in a lifting movement in at least approximately radial direction with respect to the axis of rotation 15 of the drive shaft 14.
- the drive shaft 14 may be part of the pump or alternatively may also be provided that the pump does not have its own drive shaft and the drive shaft 14 is part of the internal combustion engine.
- the drive shaft 14 may be, for example, a shaft of the internal combustion engine through which the gas exchange valves of the internal combustion engine are actuated.
- the drive shaft 14 has a cam 16 or eccentric for driving the pump piston 12.
- the pump has a pump housing, which may be designed in several parts.
- the pump piston 12 is tightly guided in a cylinder bore 18 of a housing part 20 of the pump wherein the housing part 20 is referred to below as the cylinder head.
- the pump piston 12 in the cylinder bore 18 defines a pump working chamber 22.
- the pump working chamber 22 has a connection via an inlet valve 24, which may be an inlet check valve opening into the pump working chamber 22 or an electrically, in particular electromagnetically controlled valve with a fuel delivery inlet 26, via which the pump working chamber 22 is filled with the radially inward to the rotational axis 15 of the drive shaft 14 directed suction stroke of the pump piston 12 with fuel.
- the fuel delivery inlet 26 is fed, for example, by a feed pump 27, is conveyed by the fuel from a fuel tank 25.
- the pump chamber 22 also has an outlet valve 28, which is, for example, an outlet check valve opening out of the pump working space 22 Connection to a drain 30, which can lead to a high-pressure accumulator 32 and over the radially outward from the rotational axis 15 of the drive shaft 14 directed away pumping stroke 12 of the pump piston 12 fuel is displaced from the pump working chamber 22.
- the pump piston 12 is supported via a roller tappet 40 on the cam 16 of the drive shaft 14.
- the roller tappet 40 has a tappet body 42 in which a roller 44 rolling on the cam 16 is rotatably mounted.
- the plunger body 42 is acted upon by a spring 46 toward the cam 16, so that the roller 44 remains in contact with the cam 16 during the suction stroke of the pump piston 12.
- the pump piston 12 projects with its end facing away from the pump working chamber 22 out of the cylinder bore 18 and is coupled at its end to the plunger body 42, so that the pump piston 12 is also acted upon by the spring 46.
- the pump piston 12 may have at its projecting from the cylinder bore 18 end in diameter relative to the guided in the cylinder bore 18 shaft enlarged piston 48.
- the cylinder head 20 has in the region of the cylinder bore 18 to the cam 16 toward a cylinder bore 18 surrounding at least approximately cylindrical portion 50.
- the spring 46 is formed as a cylindrical helical compression spring, surrounds the portion 50 of the cylinder head 20 and is supported on the cylinder head 20 from.
- a sealing ring 52 is provided which surrounds the end region of the pump piston 12 projecting from the cylinder bore 18 on its circumference.
- the sealing ring 52 is under radial bias with at least one arranged on the inner circumference elastic sealing lip 54 on the pump piston 12 at.
- the at least one sealing lip 54 preferably has a surface with a low coefficient of friction, at least in the region of its contact with the pump piston 12, in order to cause only slight frictional forces during the lifting movement of the pump piston 12.
- the sealing ring 52 has two or three sealing lips 54 spaced from one another in the direction of the longitudinal axis 13 of the pump piston 12.
- the sealing ring 52 is made of PTFE, polytetrafluoroethylene, for example.
- the portion 50 of the cylinder head 20 has at its end to the cylinder bore 18 at least approximately coaxial bore 58 which has a larger diameter than the cylinder bore 18 and which forms a receptacle for the sealing ring 52.
- an annular shoulder 60 is formed at the transition from the bore 58 to the cylinder bore 18.
- the sealing ring 52 is secured in the receptacle 58 in the direction of the longitudinal axis 13 of the pump piston 12 by a holding element 64.
- the holding member 64 may be, for example, a resilient ring which is engaged in an annular groove 68 in the inner periphery of the receptacle 58.
- the holding element 64 may also be formed, for example, as a disk, which is for example pressed into the receptacle 58 or fastened in some other way.
- the sealing ring 52 is sleeve-shaped and on the inside of which at least one sealing lip 54 is formed.
- the sealing ring 52 may each have an annular groove 70 at its two axial end faces pointing in the direction of the longitudinal axis 13 of the pump piston 12. By the annular grooves 70 it is achieved that the axial edge regions of the sealing ring 52 are radially elastically deformable.
- a spring 72 may be inserted in the annular grooves 70, by which a radial bias of the sealing ring 52 is generated with its at least one sealing lip 54 on the pump piston 12.
- a space 74 is limited, in which passes in the stroke movement of the pump piston 12 between this and the cylinder bore 18 from the pump working chamber 22 leaking leakage fuel.
- the space 74 may be extended by an annular groove 76 surrounding the end region of the cylinder bore 18.
- the fuel delivery inlet 26 has a first inlet section 26 a, which leads from the feed pump 27 into the space 74 and a second inlet section 26 b, which leads from the space 74 to the inlet valve 24.
- the confluence of the second inlet section 26b in the space 74 is located in a different peripheral region of the space 74 than the confluence of the first inlet section 26a, wherein the junctions of the inlet sections 26a, 26b are in particular diametrically opposite each other with respect to the longitudinal axis 13 of the pump piston 12.
- the inlet sections 26a, 26b are designed, for example, in the form of bores in the cylinder head 20.
- a bypass connection 78 branches off from the second inlet section 26b upstream of the inlet valve 24 and leads into a relief region, for example into a return line to the fuel tank 25.
- the bypass connection 78 it is possible that a flow through the space 74 takes place even if there is no supply of fuel via the inlet valve 24 into the pump working chamber 22, the inlet valve 24 is thus closed. In this case, fuel can flow into the discharge area via the bypass connection 78.
- a pressure valve 80 is arranged in the bypass connection 78, which releases the bypass connection 78 only when the opening pressure of the pressure valve 80 in the inlet section 26b is exceeded.
- a throttle 82 may also be arranged in the bypass connection 78 in order to limit the flow through the bypass connection 78.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Fuel-Injection Apparatus (AREA)
- Details Of Reciprocating Pumps (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102014217388.4A DE102014217388A1 (de) | 2014-09-01 | 2014-09-01 | Kraftstoffhochdruckpumpe, insbesondere für eine Kraftstoffeinspritzeinrichtung einer Brennkraftmaschine |
PCT/EP2015/066025 WO2016034316A1 (de) | 2014-09-01 | 2015-07-14 | Kraftstoffhochdruckpumpe, insbesondere für eine kraftstoffeinspritzeinrichtung einer brennkraftmaschine |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3189227A1 EP3189227A1 (de) | 2017-07-12 |
EP3189227B1 true EP3189227B1 (de) | 2019-02-27 |
Family
ID=53546624
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP15738071.8A Active EP3189227B1 (de) | 2014-09-01 | 2015-07-14 | Kraftstoffhochdruckpumpe, insbesondere für eine kraftstoffeinspritzeinrichtung einer brennkraftmaschine |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP3189227B1 (zh) |
JP (1) | JP2017529485A (zh) |
KR (1) | KR20170044754A (zh) |
CN (1) | CN106662062B (zh) |
DE (1) | DE102014217388A1 (zh) |
WO (1) | WO2016034316A1 (zh) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102016114148A1 (de) * | 2016-08-01 | 2018-02-01 | L'orange Gmbh | Hochdruckpumpe, insbesondere zur Kraftstoffeinspritzung |
IT201700065545A1 (it) * | 2017-06-13 | 2018-12-13 | Bosch Gmbh Robert | Gruppo pompa per l'alimentazione di combustibile ad un motore a combustione interna |
IT201700098475A1 (it) * | 2017-09-01 | 2019-03-01 | Bosch Gmbh Robert | Gruppo pompa per alimentare carburante ad un motore a combustione interna |
DE102020114417A1 (de) * | 2020-05-29 | 2021-12-02 | Liebherr-Components Deggendorf Gmbh | Hochdruckpumpe |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4215000B2 (ja) * | 2005-01-19 | 2009-01-28 | 株式会社デンソー | 高圧ポンプ |
JP5002351B2 (ja) * | 2007-06-28 | 2012-08-15 | 本田技研工業株式会社 | スクータ型車両 |
US7677872B2 (en) * | 2007-09-07 | 2010-03-16 | Gm Global Technology Operations, Inc. | Low back-flow pulsation fuel injection pump |
DE102008040452A1 (de) * | 2008-07-16 | 2010-01-21 | Robert Bosch Gmbh | Zweistufige Hochdruckpumpe |
DE102008042649B4 (de) * | 2008-10-07 | 2017-07-27 | Robert Bosch Gmbh | Steckpumpe mit integrierter Niederdruckpumpe |
US7827967B2 (en) * | 2008-10-23 | 2010-11-09 | Gm Global Technology Operations, Inc. | Low noise fuel pump with variable pressure regulation |
DE102009000859A1 (de) | 2009-02-13 | 2010-08-19 | Robert Bosch Gmbh | Kraftstoffhochdruckpumpe |
JP5321432B2 (ja) * | 2009-12-03 | 2013-10-23 | 株式会社デンソー | 燃料供給装置 |
DE102010039211A1 (de) * | 2010-08-11 | 2012-02-16 | Robert Bosch Gmbh | Kraftstoffeinspritzsystem für eine Brennkraftmaschine |
US9188096B2 (en) * | 2011-09-06 | 2015-11-17 | Toyota Jidosha Kabushiki Kaisha | Fuel pump and fuel supply system of internal combustion engine |
DE102012218552B4 (de) * | 2012-10-11 | 2016-03-24 | Continental Automotive Gmbh | Pumpe |
-
2014
- 2014-09-01 DE DE102014217388.4A patent/DE102014217388A1/de not_active Withdrawn
-
2015
- 2015-07-14 WO PCT/EP2015/066025 patent/WO2016034316A1/de active Application Filing
- 2015-07-14 EP EP15738071.8A patent/EP3189227B1/de active Active
- 2015-07-14 JP JP2017511616A patent/JP2017529485A/ja active Pending
- 2015-07-14 KR KR1020177008956A patent/KR20170044754A/ko unknown
- 2015-07-14 CN CN201580046931.8A patent/CN106662062B/zh active Active
Non-Patent Citations (1)
Title |
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None * |
Also Published As
Publication number | Publication date |
---|---|
CN106662062A (zh) | 2017-05-10 |
EP3189227A1 (de) | 2017-07-12 |
DE102014217388A1 (de) | 2016-03-03 |
JP2017529485A (ja) | 2017-10-05 |
CN106662062B (zh) | 2019-07-26 |
WO2016034316A1 (de) | 2016-03-10 |
KR20170044754A (ko) | 2017-04-25 |
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