EP3821119A1 - Piston pump, in particular high-pressure fuel pump for an injection system of an internal combustion engine - Google Patents
Piston pump, in particular high-pressure fuel pump for an injection system of an internal combustion engineInfo
- Publication number
- EP3821119A1 EP3821119A1 EP19725704.1A EP19725704A EP3821119A1 EP 3821119 A1 EP3821119 A1 EP 3821119A1 EP 19725704 A EP19725704 A EP 19725704A EP 3821119 A1 EP3821119 A1 EP 3821119A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- piston
- section
- pump
- piston pump
- tread portion
- 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.)
- Withdrawn
Links
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
- F02M59/02—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
- F02M59/025—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 a single piston
-
- 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
-
- 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
- F04B1/0408—Pistons
-
- 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
- F04B15/00—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts
-
- 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
- F04B19/00—Machines or pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B1/00 - F04B17/00
- F04B19/20—Other positive-displacement pumps
- F04B19/22—Other positive-displacement pumps of reciprocating-piston type
-
- 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
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/14—Pistons, piston-rods or piston-rod connections
Definitions
- Injection unit can be provided.
- the high compression creates on the side of the piston facing the working area
- the piston of the piston pump can be a reciprocating piston for compressing a medium (fluid), for example fuel.
- a medium for example fuel
- Piston pump can be a high pressure pump
- the tread portion of the piston tapers in cross-section (diameter) toward its end facing the working space, that is to say it is tapered there in comparison to other portions of the tread portion.
- the piston in its tread portion has an outer contour that tapers towards its end facing the working space (reducing in the outer dimensions or in cross section).
- the piston can have an actuating section via which the piston can be driven by means of a drive device (for example a camshaft).
- a drive device for example a camshaft.
- the compression section and / or the actuation section can have a cross section that is reduced in comparison with the tread section.
- the piston can be rotationally symmetrical (several sections with different diameters).
- the tread portion (viewed in longitudinal section) can advantageously have a spherical outer contour. This results in a gradual and steady change in the cross-section in the tread section towards its end facing the working space. Formation of body edges in the
- Tread portion can be avoided with this.
- the outer contour of the tread portion can be designed such that it also tapers at the end of the tread portion facing away from the working space.
- a region with a maximum cross section, for example maximum diameter, can be formed in a central region of the tread portion, over which the tread portion is guided on the guide element of the piston pump.
- the tread portion can be one there
- the tread portion of the piston and thus the piston as a whole can be guided over the circular cylindrical portion on the guide element.
- the tread section can have a conical (tapering towards the working area) section at its end facing the working area. This is also a gradual one
- the circular cylindrical section can directly adjoin the conical section.
- the guide element can have a circular cylindrical inner surface on which the piston is guided with its tread portion. This is a simple to produce guide element with sufficient
- the design of the guide element as a bushing allows a flexible adaptation of the guide element to a piston to be used with regard to dimensions and material and is independent of the pump housing.
- the socket can also be called a sleeve.
- the guide element is designed as a bore formed in the housing of the piston pump. If the guide element is designed as a bore, the number of components of the piston pump can be reduced, which can make production easier. A Space reduction in the radial direction - based on the central longitudinal axis of the piston - can be achieved.
- Figure 1 shows an embodiment of a piston pump in a
- FIG. 4 shows, in an enlarged and sectional side view, a tread portion of the piston of the piston pump from FIG. 1 formed with a conical portion;
- FIG. 5 shows an enlarged and sectioned side view of an overall conical tread portion of the piston of the piston pump from FIG. 1.
- the piston 22 has a tread portion 26, via which the piston 22 is guided on the pump housing 12 by means of the guide element 28.
- the guide element 28 has a circular cylindrical inner surface 30 on which the piston 22 is guided with its tread section 26.
- the guide element 28 is in the present exemplary embodiment as one in the housing 12
- Piston pump 10 arranged, i.e. inserted into the housing 12, socket formed. It is also conceivable that the guide element 28 is designed as a bore formed in the housing 12 of the piston pump 10 (not shown).
- the piston 22 has a compression section 34 at its end 32 facing the working space 24 (right end in FIG. 2).
- Compression section 34 adjoins tread section 26 and has a smaller diameter than tread section 26.
- a shoulder 42 is located between the compression section 34 and the tread section 26.
- the piston 22 has an actuating section 38 via which the piston 22 can be actuated and thus driven, for example by means of a camshaft of an internal combustion engine.
- the actuating section 38 borders on the
- Tread portion 26 and has a smaller diameter than the tread portion 26.
- a shoulder 43 is located between the actuating section 38 and the tread section 26.
- the tread portion 26 of the piston 22 is tapered in cross section towards its end 32 facing the working space 24 (see FIGS. 3 to 5).
- the piston 22 does not have a continuous circular cylindrical shape in the tread portion 26, but rather a tapering toward its end 32 facing the working space 24, i.e. viewed in longitudinal section one in the outer dimensions or in cross section
- FIG. 3 shows an embodiment of the piston 22 with a tread portion 26 which (viewed in longitudinal section) has a spherical outer contour 40.
- the outer contour 40 tapers continuously towards its end 32 facing the working space 24.
- the spherical outer contour 40 ends in the shoulder 42 between the tread section 26 and the compression section 34.
- the outer contour 40 of the tread section 26, starting from a central region 41 of the tread section 26, can also continuously change to the latter
- a region with a maximum cross section, for example with a maximum diameter, can thus be formed in the central region 41 of the tread portion 26, over which the tread portion 26 is guided on the guide element 28 of the piston pump 10.
- the tread portion 26 can alternatively have a circular cylindrical portion there, as described above (not shown).
- the tread section 26 has a circular cylindrical section 46 on the side 36 of the conical section 44 facing away from the working space 24.
- the tread portion 26 of the piston 22 and thus the piston 22 as a whole can be guided on the guide element 28 via this circular cylindrical portion 46.
- Figure 5 shows an embodiment of the piston 22 with a tread portion 26 which is conical overall or the one conical overall
- the outer contour 48 is that of the work area
- the tread portion 26 can be trapezoidal or can be designed as a truncated cone (cone axis of the truncated cone congruent with the central longitudinal axis of the piston).
- the conical section 44 ends on the one hand in paragraph 42 between tread portion 26 and compression section 34 and on the other hand in paragraph 43 between
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Details Of Reciprocating Pumps (AREA)
- Fuel-Injection Apparatus (AREA)
- Compressor (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102018211638.5A DE102018211638A1 (en) | 2018-07-12 | 2018-07-12 | Piston pump, in particular high-pressure fuel pump for an injection system of an internal combustion engine |
PCT/EP2019/062925 WO2020011433A1 (en) | 2018-07-12 | 2019-05-20 | Piston pump, in particular high-pressure fuel pump for an injection system of an internal combustion engine |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3821119A1 true EP3821119A1 (en) | 2021-05-19 |
Family
ID=66625970
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19725704.1A Withdrawn EP3821119A1 (en) | 2018-07-12 | 2019-05-20 | Piston pump, in particular high-pressure fuel pump for an injection system of an internal combustion engine |
Country Status (7)
Country | Link |
---|---|
US (1) | US20210277857A1 (en) |
EP (1) | EP3821119A1 (en) |
JP (1) | JP7155387B2 (en) |
KR (1) | KR20210028648A (en) |
CN (1) | CN112424467A (en) |
DE (1) | DE102018211638A1 (en) |
WO (1) | WO2020011433A1 (en) |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH319354A (en) * | 1952-12-02 | 1957-02-15 | Maihak Ag | pump |
JPH09151832A (en) * | 1995-11-29 | 1997-06-10 | Mitsubishi Heavy Ind Ltd | Fuel injection pump for internal combustion engine |
JPH10266970A (en) * | 1997-03-21 | 1998-10-06 | Komatsu Ltd | Piston of swash plate type piston pump/motor |
DE10045281C1 (en) * | 2000-09-13 | 2002-05-23 | Orange Gmbh | High pressure fuel pump has reduced diameter of piston head corresponding with spacing of heat input from compression cavity |
JP2005240724A (en) | 2004-02-27 | 2005-09-08 | Mitsubishi Heavy Ind Ltd | Refrigerant conveying pump |
DE102004012950A1 (en) * | 2004-03-17 | 2005-10-13 | Man B & W Diesel Ag | High-pressure pump piston-cylinder unit |
JP5071401B2 (en) * | 2009-02-05 | 2012-11-14 | 株式会社デンソー | Fuel supply device |
KR101350110B1 (en) * | 2009-04-01 | 2014-01-09 | 퍼듀 리서치 파운데이션 | Positive displacement machine piston with wavy surface form |
US9181944B2 (en) * | 2011-03-31 | 2015-11-10 | Denso Corporation | High pressure pump having unitary discharge and relief valve |
US8720317B2 (en) * | 2011-12-29 | 2014-05-13 | Etagen, Inc. | Methods and systems for managing a clearance gap in a piston engine |
GB201402535D0 (en) * | 2014-02-13 | 2014-04-02 | Delphi Int Operations Luxembourg Sarl | Fuel pump |
DE102014211591A1 (en) | 2014-06-17 | 2015-12-17 | Robert Bosch Gmbh | Piston pump, in particular fuel pump for a fuel system for an internal combustion engine |
DE102014220878A1 (en) * | 2014-10-15 | 2016-04-21 | Continental Automotive Gmbh | High-pressure fuel pump |
US10036383B2 (en) * | 2015-04-07 | 2018-07-31 | Caterpillar Inc. | Pump piston having variable diameter |
CN207406478U (en) | 2017-10-26 | 2018-05-25 | 重庆红江机械有限责任公司 | A kind of hydraulic pressure exhaust actuates the two level plunger of pump |
-
2018
- 2018-07-12 DE DE102018211638.5A patent/DE102018211638A1/en not_active Withdrawn
-
2019
- 2019-05-20 CN CN201980046623.3A patent/CN112424467A/en active Pending
- 2019-05-20 KR KR1020217000618A patent/KR20210028648A/en not_active Application Discontinuation
- 2019-05-20 WO PCT/EP2019/062925 patent/WO2020011433A1/en unknown
- 2019-05-20 US US17/258,987 patent/US20210277857A1/en not_active Abandoned
- 2019-05-20 JP JP2021500567A patent/JP7155387B2/en active Active
- 2019-05-20 EP EP19725704.1A patent/EP3821119A1/en not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
JP7155387B2 (en) | 2022-10-18 |
CN112424467A (en) | 2021-02-26 |
DE102018211638A1 (en) | 2020-01-16 |
US20210277857A1 (en) | 2021-09-09 |
JP2021531432A (en) | 2021-11-18 |
WO2020011433A1 (en) | 2020-01-16 |
KR20210028648A (en) | 2021-03-12 |
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