EP2496837A2 - Pumpeinheit für die kraftstoffzufuhr, vorzugsweise diesel, eines verbrennungsmotors - Google Patents

Pumpeinheit für die kraftstoffzufuhr, vorzugsweise diesel, eines verbrennungsmotors

Info

Publication number
EP2496837A2
EP2496837A2 EP10763714A EP10763714A EP2496837A2 EP 2496837 A2 EP2496837 A2 EP 2496837A2 EP 10763714 A EP10763714 A EP 10763714A EP 10763714 A EP10763714 A EP 10763714A EP 2496837 A2 EP2496837 A2 EP 2496837A2
Authority
EP
European Patent Office
Prior art keywords
plug
pump unit
fuel
unit according
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.)
Granted
Application number
EP10763714A
Other languages
English (en)
French (fr)
Other versions
EP2496837B1 (de
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/de
Application granted granted Critical
Publication of EP2496837B1 publication Critical patent/EP2496837B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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.
  • the present invention relates to a pump unit comprising a pump housing, a piston pump for supplying the fuel to an internal combustion engine, and a gear pump for supplying the fuel to the piston pump.
  • the piston pump comprises at least one cylinder, a piston engaged slidably in the cylinder, a passage for the intake of the fuel into the cylinder, a passage for delivering the fuel to the internal combustion engine, and a check valve fitted in the delivery passage to prevent the backflow of the fuel into the cylinder.
  • the check valve comprises a substantially spherical plug which is movable between a position in which it closes the delivery passage and a position in which it opens it, and a spring for moving the plug into its closed position and, normally, keeping it there.
  • the plug Since the plug is supported solely by the spring, the plug is movable from its closed position, in which it engages an annular spherical seat formed in the delivery passage, to its open position along a path which is not rectilinear and which does not coincide with the longitudinal axis of the delivery passage, the plug therefore being displaced radially and made to rotate by the fuel supplied through the delivery passage. Consequently, the movement of the plug from its open to its closed position also takes place along a non-rectilinear path which does not coincide with the longitudinal axis of the delivery passage, and the plug is therefore kept in rotation by the hydraulic force exerted by the fuel, and is moved radially against a lateral wall of the aforesaid annular spherical seat.
  • the centrifugal force generated by the rotation of the plug can be so great, in certain operating conditions, that it retards or even prevents the correct closure of the delivery passage.
  • 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.
  • 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 Pumpeinheit für die kraftstoffzufuhr, vorzugsweise diesel, eines verbrennungsmotors Not-in-force EP2496837B1 (de)

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 true EP2496837A2 (de) 2012-09-12
EP2496837B1 EP2496837B1 (de) 2018-05-09

Family

ID=42272163

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10763714.2A Not-in-force EP2496837B1 (de) 2009-11-06 2010-10-12 Pumpeinheit für die kraftstoffzufuhr, vorzugsweise diesel, eines verbrennungsmotors

Country Status (6)

Country Link
EP (1) EP2496837B1 (de)
CN (1) CN102597521B (de)
IN (1) IN2012DN01494A (de)
IT (1) ITMI20091948A1 (de)
RU (1) RU2555097C2 (de)
WO (1) WO2011054632A2 (de)

Families Citing this family (5)

* 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
WO2016055294A1 (en) * 2014-10-09 2016-04-14 Robert Bosch Gmbh Pump unit for supplying fuel, preferably diesel oil, to an internal combustion engine
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
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

Family Cites Families (12)

* Cited by examiner, † Cited by third party
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
DE60325122D1 (de) * 2002-10-09 2009-01-15 Tacmina Corp Membranpumpe und Rückschlagventil
DE10346211A1 (de) * 2003-05-22 2004-12-09 Robert Bosch Gmbh Rückschlagventil, insbesondere für eine Hochdruckpumpe einer Kraftstoffeinspritzeinrichtung für eine Brennkraftmaschine
JP2009531577A (ja) * 2006-01-31 2009-09-03 ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング 内燃機関に燃料を供給するための高圧ポンプ
EP1813845A1 (de) * 2006-01-31 2007-08-01 Centro Studi Componenti per Veicoli S.P.A. Hochdruckkolbenpumpe zur Kräftstoffförderung an eine Brennkraftmaschine

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2011054632A2 *

Also Published As

Publication number Publication date
IN2012DN01494A (de) 2015-06-05
EP2496837B1 (de) 2018-05-09
RU2555097C2 (ru) 2015-07-10
RU2012123138A (ru) 2013-12-20
CN102597521B (zh) 2015-03-25
WO2011054632A2 (en) 2011-05-12
WO2011054632A3 (en) 2011-07-14
CN102597521A (zh) 2012-07-18
ITMI20091948A1 (it) 2011-05-07

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