EP3563058B1 - Pumpenaggregat zum zuführen von kraftstoff, bevorzugt diesel, zu einem verbrennungsmotor - Google Patents

Pumpenaggregat zum zuführen von kraftstoff, bevorzugt diesel, zu einem verbrennungsmotor Download PDF

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Publication number
EP3563058B1
EP3563058B1 EP17818534.4A EP17818534A EP3563058B1 EP 3563058 B1 EP3563058 B1 EP 3563058B1 EP 17818534 A EP17818534 A EP 17818534A EP 3563058 B1 EP3563058 B1 EP 3563058B1
Authority
EP
European Patent Office
Prior art keywords
cylinder
fuel
piston
combustion engine
pump unit
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
Application number
EP17818534.4A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3563058A1 (de
Inventor
Alessandro De Luca
Luigi Fiorentino
Valeria Cecilia BELGIOVINE
Ottavio CORIZZO
Tobias Reiser
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP3563058A1 publication Critical patent/EP3563058A1/de
Application granted granted Critical
Publication of EP3563058B1 publication Critical patent/EP3563058B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • 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
    • F02M59/46—Valves
    • F02M59/462—Delivery valves
    • 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
    • F04B1/0421—Cylinders
    • 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
    • F04B1/0439—Supporting or guiding means for the 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
    • F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
    • F04B17/05—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by internal-combustion engines
    • 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
    • F04B53/10—Valves; Arrangement of valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/06—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
    • F04C15/064—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet with inlet and outlet valves specially adapted for rotary or oscillating piston machines or pumps
    • 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
    • F02M2200/02—Fuel-injection apparatus having means for reducing wear
    • 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
    • F02M2200/04—Fuel-injection apparatus having means for avoiding effect of cavitation, e.g. erosion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2210/00—Working fluid
    • F05B2210/10—Kind or type
    • F05B2210/11—Kind or type liquid, i.e. incompressible

Definitions

  • the present invention relates to a pump unit for supplying fuel, preferably diesel, to an internal combustion engine.
  • the present invention relates to a pump assembly of the type comprising a pump body, at least one cylinder formed in the pump body, a piston slidably disposed in the cylinder, and an actuator for moving the piston during a suction stroke to suck the fuel into the cylinder and at a Move compression stroke to compress the fuel contained in the cylinder includes.
  • a pump unit is through the document WO 2010/130502 A1 known. Also through the document WO 2015/091264 A1 such a pump unit is known.
  • the pump unit further comprises a suction line for drawing the fuel into the cylinder, a suction valve which is mounted along the suction line to selectively control the supply of fuel into the cylinder, a pressure line for pressing the fuel to the internal combustion engine and a pressure valve which runs along the pressure line is attached to selectively control the supply of fuel to the internal combustion engine.
  • the pressure line runs coaxially to a longitudinal axis of the cylinder, and a closure part of the pressure valve is displaceably arranged in it.
  • the closure part of the pressure valve thus faces the piston axially and is movable between an open position and a closed position of the pressure line.
  • the closure part has a substantially spherical coupling section which is designed in such a way that it couples in a fluid-tight manner to a substantially frustoconical coupling section of the pressure line when the closure part is in its closed position.
  • the known pump units of the type mentioned above have some disadvantages, which are mainly due to the fact that the piston generates pressure waves during its compression stroke inside the cylinder, between the closure part of the pressure valve and the piston parallel to the longitudinal axis of the cylinder at least during the initial phase of the compression stroke the piston, d. H. if the pressure valve is still closed, ricochet.
  • a pressure valve which has a closure part which, on its end face facing a piston, has a cavity which opens outward on the end face and which communicates with a cylinder in which the piston is arranged.
  • the cavity is arranged centrally in the end surface and this is intended to improve the opening behavior of the pressure valve.
  • a pressure valve which has a closure part which, on its end face facing a piston, has a cylindrical cavity which opens outward on the end face and which communicates with a cylinder in which the piston is arranged.
  • the cavity serves to flow through the closure part, with cross bores adjoining the cavity on its side facing away from the cylinder.
  • the object of this invention is to design a pump unit for supplying fuel, preferably diesel, to an internal combustion engine, in which cavitation is reduced in the area of the pressure valve.
  • a pump assembly for supplying fuel, preferably diesel, to an internal combustion engine is designed according to the appended claims.
  • the pump unit 1 comprises a piston pump 2 for supplying the fuel to the aforementioned internal combustion engine (not shown) and a prefeed pump 3, for example a gear pump, for supplying the fuel to the pump 2.
  • the pump unit 1 has a pump body which comprises a housing 4 which is provided with a central bore 5 which has a longitudinal axis 6 and with at least one lateral bore 7 (normally a plurality of bores 7 which are uniformly about the axis 6 are distributed), which has a longitudinal axis 8, which runs transversely to the axis 6 and extends radially outward from the housing 4 starting from the bore 5.
  • Each bore 7 is closed by a head part 9 which is arranged in contact with the housing 4 and has an extension 10 which projects into the bore 7 coaxially to the axis 8.
  • the head part 9 has a central bore 11, which is formed through the head part 9 coaxially to the axis 8, and comprises a narrowed intermediate section 12, which is arranged between two widened sections 13a, 13b, the section 13a facing the bore 5 and defines a cylinder 14 of the piston pump 2.
  • a piston 15 is slidably disposed in the cylinder 14 and is movable under the thrust of an actuator 16 with a straight forward and backward movement which includes a suction stroke for sucking the fuel into the cylinder 14 and a compression stroke for compressing the fuel contained in the cylinder 14 .
  • the device 16 comprises a tubular sleeve 17 which is displaceably arranged in the bore 7 coaxially to the axis 8, extends around the cylinder 14 and has an annular inner flange 18 which projects radially from an inner surface of the sleeve 17 and this sleeve 17 in divides two cylindrical sections 19, 20, the section 19 facing the bore 5.
  • the device 16 also has a tappet 21, which comprises a substantially cylindrical coupling block 22, which is held in place by an oversize in the section 19, is arranged in contact with the flange 18 and carries a tappet roller 23.
  • the roller 23 projects from the block 22 to the bore 5 and is rotatably coupled to the block 22 in order to rotate with respect to this block 22 about its own longitudinal axis 24, which is essentially perpendicular to the axis 8.
  • the flange 18 carries an annular plate 25 which extends around the piston 15, is inserted into the section 20 of the sleeve 17 coaxial to the axis 8 and an outer peripheral edge which axially faces the flange 18 and an inner peripheral edge which axially facing a bottom of the piston 15.
  • the device 16 further includes a compression spring 26 which is mounted between the extension 10 and the sleeve 17 coaxially to the axis 8 and which sits between the head part 9 and the plate 25 to move the plate 25 into contact with the flange 18 and normally to hold and normally move and hold the roller 23 in contact with a cam 27 formed on an outer surface of an intermediate portion of a drive shaft 28 which is fitted through the bore 5 to rotate with respect to the housing 4 about the axis 6 to turn.
  • a compression spring 26 which is mounted between the extension 10 and the sleeve 17 coaxially to the axis 8 and which sits between the head part 9 and the plate 25 to move the plate 25 into contact with the flange 18 and normally to hold and normally move and hold the roller 23 in contact with a cam 27 formed on an outer surface of an intermediate portion of a drive shaft 28 which is fitted through the bore 5 to rotate with respect to the housing 4 about the axis 6 to turn.
  • the head part 9 accommodates in its interior a suction valve 29 for sucking the fuel into the cylinder 14 and a pressure valve 30 for pushing the fuel to the internal combustion engine (not shown).
  • the valve 29 is mounted in a suction line 31, which has a longitudinal axis 32 running perpendicular to the axis 8, and comprises a cylindrical valve body 33, which extends around the axis 32 and axially along the line 31 through a cover 34, which goes into the Line 31 is screwed, is held.
  • the valve 29 further includes a closure member 35 which is attached through the valve body 33 to move between an open position and a closed position of the valve 29.
  • the closure part 35 is moved into its closed position by a spring 36, which is seated between the valve body 33 and an annular plate 37, which is attached to the closure part 35 transversely to the axis 32, and is normally held there.
  • the valve 30 controls the supply of fuel along a pressure line defined through the head part 9 through the sections 12 and 13b and comprises a cup-shaped closure part 38 which is slidably arranged in the section 13b and between an open position and a closed position of the valve 30 is movable.
  • the closure part 38 is moved into its closed position by a spring 39, which sits between the closure 38 and a stop sleeve 40 attached in section 13b, and is normally held there.
  • the sections 12, 13b are connected to one another by a shoulder which is provided with a substantially frustoconical coupling section 41 which is designed in such a way that it couples in a fluid-tight manner to a substantially spherical coupling section 42 of the closure part 38.
  • the closure part 38 is axially delimited by a free end surface 43 which faces the piston 15 and is provided with a cavity 44 which has a substantially hemispherical shape and which extends outward on a substantially flat and perpendicular to the axis 8 middle Section 45 of surface 43 opens.
  • Figure 3 shows an embodiment of cavity 44 not according to the invention.
  • FIG 4 variant shown differs from the representation in Figure 3 only in that the closure part 38 was removed in it and replaced by a closure part 46 which has an extension 47 which protrudes into the section 12 and is axially delimited by an essentially flat end surface 48 running perpendicular to the axis 8.
  • the extension 47 has a cross section which is smaller than the cross section of the section 12 and is provided with a cavity 49 which has a substantially cylindrical shape, extends coaxially with the axis 8 and opens outwards on the surface 48.
  • the cavity 49 communicates with the section 12 via a plurality of radial bores 50, which are evenly distributed around the axis 8 and are formed through a side wall of the cavity 49 transversely to the axis 8.
  • Figure 4 shows an embodiment of cavity 49 not according to the invention.
  • the closure part 51 is provided with a cavity 53 which has an annular shape, extends around the axis 8 and opens outwards at a lateral, essentially spherical section 54 of the surface 52.
  • the piston 15 In operation, the piston 15 generates pressure waves in the cylinder 14 during its compression stroke.
  • the cavities 44, 49, 53 make it possible to concentrate the vapor bubbles in their interior, prevent the vapor bubbles from reaching the coupling sections 41, 42, prevent wear due to cavitation of the coupling sections 41, 42 and thereby guarantee the perfect fluid-tight coupling of the closure parts 38 , 46, 51 with the head part 9.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Lift Valve (AREA)
EP17818534.4A 2016-12-27 2017-12-15 Pumpenaggregat zum zuführen von kraftstoff, bevorzugt diesel, zu einem verbrennungsmotor Active EP3563058B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT102016000131338A IT201600131338A1 (it) 2016-12-27 2016-12-27 Gruppo di pompaggio per alimentare combustibile, preferibilmente gasolio, ad un motore a combustione interna
PCT/EP2017/083015 WO2018122005A1 (de) 2016-12-27 2017-12-15 Pumpenaggregat zum zuführen von kraftstoff, bevorzugt diesel, zu einem verbrennungsmotor

Publications (2)

Publication Number Publication Date
EP3563058A1 EP3563058A1 (de) 2019-11-06
EP3563058B1 true EP3563058B1 (de) 2020-07-15

Family

ID=58670243

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17818534.4A Active EP3563058B1 (de) 2016-12-27 2017-12-15 Pumpenaggregat zum zuführen von kraftstoff, bevorzugt diesel, zu einem verbrennungsmotor

Country Status (7)

Country Link
US (1) US10954907B2 (ko)
EP (1) EP3563058B1 (ko)
JP (1) JP6887504B2 (ko)
KR (1) KR20190100953A (ko)
CN (1) CN110121593B (ko)
IT (1) IT201600131338A1 (ko)
WO (1) WO2018122005A1 (ko)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201900018122A1 (it) * 2019-10-07 2021-04-07 Bosch Gmbh Robert Gruppo di pompaggio per alimentare un fluido, in particolare combustibile, preferibilmente gasolio, ad una utenza, in particolare un motore a combustione interna

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3100449A (en) * 1959-02-04 1963-08-13 Borg Warner Fuel injection pump
JPS59229793A (ja) 1983-06-10 1984-12-24 Fujitsu Ltd 遅延量可変形シフトレジスタ
IT1200685B (it) * 1985-07-22 1989-01-27 Piaggio & C Spa Pompa meccanica di iniezione di combustibile,in particolare permotori a combustione interna ad accensione comandata
IT1198062B (it) * 1986-10-22 1988-12-21 Piaggio & C Spa Motore a combustione interna a due tempi,ad iniezione di combustibile ed accensione comandata
DE4037465A1 (de) * 1990-10-31 1992-05-07 Daimler Benz Ag Kraftstoffeinspritzpumpe fuer brennkraftmaschinen
US6668797B2 (en) * 2002-05-13 2003-12-30 Advanced Vehicle Technologies Fuel injection pump system
DE10254711B3 (de) 2002-11-23 2004-04-15 Motorenfabrik Hatz Gmbh & Co Kg Druckventil mit zusätzlicher Spritzverstellerfunktion
JP2004270641A (ja) * 2003-03-11 2004-09-30 Yanmar Co Ltd ディーゼルエンジン
JP2005248319A (ja) 2004-02-06 2005-09-15 Tokyo Univ Of Science 有機溶媒のゲル電解質を用いた金属の電気めっき方法
ATE451548T1 (de) * 2006-05-19 2009-12-15 Ct Studi Componenti Per Veicol Kraftstoffhochdruckpumpe
IT1394070B1 (it) * 2009-05-13 2012-05-25 Bosch Gmbh Robert Gruppo valvola per controllare l'alimentazione e la mandata di combustibile di una camera di compressione di una pompa a pistoni di alta pressione e pompa a pistoni di alta pressione comprendente tale gruppo valvola
DE102010039501A1 (de) * 2010-08-19 2012-02-23 Robert Bosch Gmbh Ventil einer Kolbenpumpe mit einem Schließkörper
ITMI20132109A1 (it) * 2013-12-17 2015-06-18 Bosch Gmbh Robert Gruppo pompa per alimentare combustibile, preferibilmente gasolio, ad un motore a combustione interna
CN105248319A (zh) 2015-09-28 2016-01-20 曹全民 一种罗非鱼养殖方法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
WO2018122005A1 (de) 2018-07-05
US10954907B2 (en) 2021-03-23
US20200124008A1 (en) 2020-04-23
EP3563058A1 (de) 2019-11-06
CN110121593A (zh) 2019-08-13
JP6887504B2 (ja) 2021-06-16
CN110121593B (zh) 2021-05-14
KR20190100953A (ko) 2019-08-29
IT201600131338A1 (it) 2018-06-27
JP2020503473A (ja) 2020-01-30

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