EP2496837B1 - Pump unit for supplying fuel, preferably diesel oil, to an internal combustion engine - Google Patents

Pump unit for supplying fuel, preferably diesel oil, to an internal combustion engine Download PDF

Info

Publication number
EP2496837B1
EP2496837B1 EP10763714.2A EP10763714A EP2496837B1 EP 2496837 B1 EP2496837 B1 EP 2496837B1 EP 10763714 A EP10763714 A EP 10763714A EP 2496837 B1 EP2496837 B1 EP 2496837B1
Authority
EP
European Patent Office
Prior art keywords
plug
fuel
tubular portion
pump unit
delivery passage
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.)
Not-in-force
Application number
EP10763714.2A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2496837A2 (en
Inventor
Thilo Rzymann
Nicola Loiudice
Massimiliano Roncone
Wolfgang Stoecklein
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 EP2496837A2 publication Critical patent/EP2496837A2/en
Application granted granted Critical
Publication of EP2496837B1 publication Critical patent/EP2496837B1/en
Not-in-force 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
    • 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
    • F04B53/1085—Valves; Arrangement of valves having means for limiting the opening height
    • 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
    • F04B53/1002—Ball valves
    • F04B53/101—Ball valves having means for limiting the opening height

Definitions

  • the present invention relates to a pump unit for supplying fuel, preferably diesel oil, to an internal combustion engine according to the preamble of claim 1.
  • Such a pump unit is known from the document EP 1 553 296 A1 .
  • This pump unit comprises a pump housing, a delivery passage formed in the pump housing for supplying fluid and a check valve positioned in the delivery passage.
  • the check valve comprises a plug which is movable between a position in which it opens the delivery passage and a position in which it closes the passage.
  • a first seat is formed in the delivery passage to receive the plug after its movement from the open to the closed position.
  • the pump further comprises a stop element fitted in the delivery passage and provided with a second seat for receiving and retaining the plug after movement of the latter from the closed to the open position.
  • the stop element comprises at least one tubular portion which has an axially open free end forming said second seat and which is hydraulically connected to the delivery passage when the plug is placed in its open position.
  • the object of the present invention is to provide a pump unit for supplying fuel, preferably diesel oil, to an internal combustion engine which is free of the drawbacks described above and which is simple and economical to produce.
  • a pump unit for supplying fuel, preferably diesel oil, to an internal combustion engine, as claimed in the appended claims.
  • fuel preferably diesel oil
  • the plug When the plug is in its open position the flow of fuel is through the tubular portion of the stop element which causes a pressure drop in the fuel, resulting in a lower pressure of the fuel contained in the tubular portion. As a consequence the plug is substantially held in the second seat throughout the delivery phase without the possibility of moving axially and/or radially.
  • the number 1 indicates, as a whole, a pump unit for supplying fuel, preferably diesel oil, to an internal combustion engine (not shown).
  • fuel preferably diesel oil
  • the pump unit 1 comprises, in the present case, a pump housing 2; a known piston pump, which is not shown, for supplying the fuel to the aforesaid internal combustion engine (not shown); and a known gear pump, which is not shown, for supplying the fuel to the piston pump (not shown).
  • the piston pump (not shown) comprises at least one cylinder which is engaged slidably by a piston which can move with a reciprocating rectilinear motion along the cylinder, and which is associated with a passage for the intake of fuel into the cylinder and with a passage 3 for delivering the fuel to the internal combustion engine (not shown).
  • the passage 3 has a specified longitudinal axis 4, and comprises a constricted portion 5 communicating with the cylinder of the piston pump (not shown), an enlarged portion 6 communicating with the internal combustion engine (not shown), and an intermediate portion 7, which extends between portions 5 and 6, and forms an annular conical seat 8 which is substantially coaxial with the axis 4.
  • the seat 8 forms part of a check valve 9, which is housed in the passage 3 to prevent the backflow of the fuel into the cylinder of the piston pump (not shown), this valve also comprising a substantially spherical plug 10, which is movable between a position in which the passage 3 is closed and a position in which it is open, and being provided with a stop member 11 mounted in the portion 6 to halt the movement of the plug 10 in its open position.
  • the member 11 is substantially screw-shaped and comprises a head 12 screwed into the pump housing 2 and a tubular shank 13, which extends into the portion 6 coaxially with the axis 4, and has an outside diameter which is smaller than the inside diameter of the portion 6.
  • the free end of the shank 13 facing the plug 10 is axially open and forms an annular conical seat 14 for halting the movement of the plug 10 in its open position.
  • the shank 13 forms, in combination with the portion 6, an annular chamber 15 which is substantially coaxial with the axis 4, and also has an internal passage 16 which is coaxial with the axis 4, and comprises an enlarged portion 17 facing the plug 10 and a constricted portion 18 facing the head 12.
  • the portion 17 houses within it a spring 19, mounted coaxially with the axis 4, for moving the plug 10 into its closed position and normally keeping it there, and communicates with the chamber 15 through a plurality of holes 20 which are uniformly distributed about the axis 4 and which are formed through the shank 13 transversely with respect to the axis 4; and the portion 18 communicates with an annular manifold 21 formed in the pump housing 2 coaxially with the axis 4 through a plurality of holes 22, which are uniformly distributed about the axis 4, and which are formed through the shank 13 transversely with respect to the axis 4.
  • the portion 6 and the shank 13 are also coupled together in a fluid-tight way by the interposition of an annular seal 23, in the present case an O-ring, mounted coaxially with the axis 4 in an intermediate point of the shank 13 between the holes 20 and 22.
  • an annular seal 23 in the present case an O-ring, mounted coaxially with the axis 4 in an intermediate point of the shank 13 between the holes 20 and 22.
  • the plug 10 is moved, by the fuel supplied by the piston pump (not shown) along the passage 3, to the position in which it opens the passage 3, thus enabling the fuel to flow, in succession, through the intermediate portion 7, along the chamber 15, through the holes 20, along the passage 16, through the holes 22, and into the manifold 21.
  • the diameter of the plug 10 and the inside diameter of the portion 17 are controlled selectively in such a way that the force exerted on the plug 10 by the fuel contained in the passage 3 is greater than the sum of the forces exerted on the plug 10 by the spring 19 and by the fuel contained in the passage 16, and since the supply of the fuel along the chamber 15 and through the holes 20 causes a pressure drop in the fuel, resulting in a lower pressure in the passage 16 than in the passage 3, the plug 10 is moved along a rectilinear path along the axis 4 in such a way that it engages the seat 14, and is substantially held in the seat 14 throughout the delivery phase of the piston pump (not shown) without the possibility of moving axially and/or radially.
  • the plug 10 is moved along a substantially rectilinear path along the axis 4 by the force of the spring 19 and the fuel contained in the passage 16, in such a way that it engages the seat 8 and closes the passage 3 relatively quickly.
  • the spring 19 is omitted, and the plug 10 is closed solely by the force of the fuel contained in the passage 16.
  • the annular seal 23 is omitted and the shank 13 is made in such a way that it comprises a constricted end portion, which is provided with the holes 20, and which has an outside diameter smaller than the diameter of the portion 6, and an enlarged intermediate portion, which extends between the holes 20 and 22, has an outside diameter substantially equal to the diameter of the portion 6, enables the fuel to be diverted through the holes 20 so as to provide the desired pressure drop in the fuel in the passage 16, and simultaneously prevents the fuel from flowing directly into the manifold 21 along the chamber 15.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
EP10763714.2A 2009-11-06 2010-10-12 Pump unit for supplying fuel, preferably diesel oil, to an internal combustion engine Not-in-force EP2496837B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT001948A ITMI20091948A1 (it) 2009-11-06 2009-11-06 Gruppo di pompaggio per alimentare combustibile, preferibilmente gasolio, ad un motore a combustione interna
PCT/EP2010/065272 WO2011054632A2 (en) 2009-11-06 2010-10-12 Pump unit for supplying fuel, preferably diesel oil, to an internal combustion engine

Publications (2)

Publication Number Publication Date
EP2496837A2 EP2496837A2 (en) 2012-09-12
EP2496837B1 true EP2496837B1 (en) 2018-05-09

Family

ID=42272163

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10763714.2A Not-in-force EP2496837B1 (en) 2009-11-06 2010-10-12 Pump unit for supplying fuel, preferably diesel oil, to an internal combustion engine

Country Status (6)

Country Link
EP (1) EP2496837B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CN (1) CN102597521B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
IN (1) IN2012DN01494A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
IT (1) ITMI20091948A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
RU (1) RU2555097C2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
WO (1) WO2011054632A2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102023208347A1 (de) 2023-08-31 2025-03-06 Robert Bosch Gesellschaft mit beschränkter Haftung Pumpenelement, insbesondere zur Förderung von hydraulischem Druckmittel in einem Bremskreis einer elektronisch schlupfregelbaren Bremsanlage eines Kraftfahrzeugs

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2612232T3 (es) * 2014-06-05 2017-05-12 Wabco Europe Bvba Bomba de vacío y sistema de una bomba de vacío y un motor
JP5913510B1 (ja) * 2014-09-26 2016-04-27 株式会社小金井精機製作所 ディーゼルポンプ
JP6453451B2 (ja) * 2014-10-09 2019-01-16 ローベルト ボッシュ ゲゼルシャフト ミット ベシュレンクテル ハフツング 燃料、好ましくはディーゼル油を内燃機関に供給するためのポンプユニット
CN106150809B (zh) * 2016-06-29 2019-06-11 中国北方发动机研究所(天津) 一种大流量高压变量泵进油阀

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080292473A1 (en) * 2006-01-31 2008-11-27 Giuseppe Marino High-Pressure Pump For Feeding Fuel To An Internal Combustion Engine

Family Cites Families (11)

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Publication number Priority date Publication date Assignee Title
US2899974A (en) * 1959-08-18 Non-return ball valve forreciprocat-
US2294568A (en) * 1941-04-21 1942-09-01 Karl P Neilsen Ball valve cage
SU109108A1 (ru) * 1957-02-01 1957-11-30 В.Е. Горбаневский Нагнетательный клапан топливного насоса высокого давлени
SU454367A1 (ru) * 1971-11-29 1974-12-25 Предприятие П/Я А-1877 Нагнетательный клапан топливного насоса
DE4213798C2 (de) * 1992-04-27 2002-10-24 Bosch Gmbh Robert Radialkolbenpumpe, insbesondere Kraftstoffpumpe für Verbrennungsmotoren
IT248790Y1 (it) * 1999-11-30 2003-02-20 Elasis Sistema Ricerca Fiat Valvola di mandata ad alta pressione per il combustibile di un motorea combustione interna.
JP4330323B2 (ja) * 2001-10-24 2009-09-16 株式会社タクミナ 往復動ポンプ
RU2221952C2 (ru) * 2002-02-18 2004-01-20 Камышев Александр Владимирович Шариковый клапан
DE60327117D1 (de) * 2002-10-09 2009-05-20 Tacmina Corp Verdrängungspumpe mit zwei Membranen
DE10346211A1 (de) * 2003-05-22 2004-12-09 Robert Bosch Gmbh Rückschlagventil, insbesondere für eine Hochdruckpumpe einer Kraftstoffeinspritzeinrichtung für eine Brennkraftmaschine
EP1813845A1 (en) * 2006-01-31 2007-08-01 Centro Studi Componenti per Veicoli S.P.A. High-pressure pump for feeding fuel to an internal combustion engine

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080292473A1 (en) * 2006-01-31 2008-11-27 Giuseppe Marino High-Pressure Pump For Feeding Fuel To An Internal Combustion Engine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102023208347A1 (de) 2023-08-31 2025-03-06 Robert Bosch Gesellschaft mit beschränkter Haftung Pumpenelement, insbesondere zur Förderung von hydraulischem Druckmittel in einem Bremskreis einer elektronisch schlupfregelbaren Bremsanlage eines Kraftfahrzeugs

Also Published As

Publication number Publication date
RU2555097C2 (ru) 2015-07-10
WO2011054632A3 (en) 2011-07-14
RU2012123138A (ru) 2013-12-20
ITMI20091948A1 (it) 2011-05-07
IN2012DN01494A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 2015-06-05
WO2011054632A2 (en) 2011-05-12
CN102597521A (zh) 2012-07-18
EP2496837A2 (en) 2012-09-12
CN102597521B (zh) 2015-03-25

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