EP0801710B1 - Dispositif d'injection de carburant pour moteurs a combustion interne - Google Patents

Dispositif d'injection de carburant pour moteurs a combustion interne Download PDF

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Publication number
EP0801710B1
EP0801710B1 EP19960934351 EP96934351A EP0801710B1 EP 0801710 B1 EP0801710 B1 EP 0801710B1 EP 19960934351 EP19960934351 EP 19960934351 EP 96934351 A EP96934351 A EP 96934351A EP 0801710 B1 EP0801710 B1 EP 0801710B1
Authority
EP
European Patent Office
Prior art keywords
valve
pressure
bore
injection device
fuel injection
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.)
Expired - Lifetime
Application number
EP19960934351
Other languages
German (de)
English (en)
Other versions
EP0801710A1 (fr
Inventor
Horst Klinger
Uwe Kuhn
Bernd Rosenau
Peter Traub
Thomas GÖTTEL
Gerd LÖSCH
Sandro Soccol
Régis BLANC
André FROMENTOUX
François Rossignol
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 EP0801710A1 publication Critical patent/EP0801710A1/fr
Application granted granted Critical
Publication of EP0801710B1 publication Critical patent/EP0801710B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F02M59/46—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
    • F02M59/44—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
    • 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
    • F02M59/464—Inlet valves of the check valve type
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/7722—Line condition change responsive valves
    • Y10T137/7837—Direct response valves [i.e., check valve type]
    • Y10T137/7838—Plural

Definitions

  • the invention is based on a fuel injection device for internal combustion engines according to the preamble of the patent claim 1 off.
  • Fuel injection system promotes a high pressure pump Fuel from a low pressure reservoir into a high pressure plenum, of which a variety of injectors is supplied.
  • the low pressure reservoir at known injection device through a fuel tank formed from the fuel with a low pre-pressure through a feed pump via a feed line into the Pump work space designed as a piston pump High pressure pump is promoted.
  • the high pressure pump into the low pressure reservoir and out to prevent the high pressure plenum in the high pressure pump is one in the housing of the high pressure pump Integrated pressure valve in the delivery line and in the High pressure line used.
  • the fuel injection device according to the invention for Internal combustion engines with the characteristic features of the Claim 1 has the advantage that the Pressure valves of the delivery line and the high pressure line in a common valve bank are integrated. It is this common valve bank also advantageously inserted into the housing of the high pressure pump, so that a compact and very low-strength design achieved can be. In addition, the separate installation of the Pressure valves in the individual lines, what the Installation effort significantly reduced.
  • Another advantage is the axially one behind the other Arrangement of the individual pressure valves in the Valve bank achieved the greatest possible wall thickness in the area of the pressure rooms with constant External dimensions enabled.
  • An embodiment of the invention Is fuel injection device for internal combustion engines shown in the drawing and will be described in more detail below explained.
  • FIG. 1 shows a section through part of the High pressure pump and through the valve bank as well as the schematic representation of the connecting lines.
  • the fuel injection device shown in Figure 1 for internal combustion engines has one High pressure pump 1, in the housing 3 a Cylinder bore 5 is provided, in which a pump piston 7 axially from a cam drive (not shown) and driven here.
  • the pump piston 7 limits doing so with its end face facing away from the cam drive a pump work space 9 in the cylinder bore 5, the the side away from the pump piston from one to the other Bore extension of the cylinder bore 5 used Valve bank 11 is limited.
  • the pump work space 9 is thereby via the valve bank 11 with a delivery line 13 connectable, which starts from a fuel tank 15 and in a feed pump 17 is inserted through which the Fuel from the fuel tank 15 via the delivery line 13 and the valve bank 11 with a low pre-pressure in the pump work space 9 of the high pressure pump 1 is promoted.
  • a high-pressure line is still connected to the valve bank 11 19 connected via which the pump work space 9 with a High-pressure plenum 21 can be connected, of which a large number from injection lines 23 to the individual in the combustion chamber of the internal combustion engine protruding injection valves 25 dissipate.
  • valve bank 11 first has a valve body 27, which is inserted into the pump housing 3 in this way, that he had one end face on one between the Cylinder bore 5 and its diameter expansion formed bore paragraph 29 of the pump housing 3 to the system arrives.
  • valve body 27 from one in the Bore of the pump housing 3 screwed connection piece 33 acts on the valve body 27 axially against the a stopper-forming bore paragraph 29 clamped and on whose end protruding from the pump housing 3 High pressure line 19 is connected.
  • the valve body 27 has an end face 31 thereof outgoing guide bore 35 in which a first Valve member 37 is guided axially. That on the peripheral surface Flattened cylindrical first valve member 37 has a conical arranged on an annular collar Sealing surface 39 with which it is conical with a first Valve seat 41 cooperates on the valve body 27, which on Exit of the guide bore 35 on the end face 31 is formed.
  • the first valve member 37 also dips its end protruding from the valve body 27 into a through hole 43 adjoining the first valve seat 41 in the connecting piece 33 in which a first valve spring 45 is arranged between the first valve member 37 and a support part 47 which is supported on a shoulder of the bore is clamped with a through opening and the thereby first valve member 37 in contact with the first valve seat 41 keeps pressed.
  • first valve member 37 there is also one of its lower end face 49 facing away from the connecting piece 33 outgoing blind bore 51 is provided in the second Valve member 53 is guided axially.
  • This second valve member 53 has at its end protruding from the blind bore 51 conical or formed by a reduction in cross section spherical sealing surface 55 with which it with a second valve seat 57 cooperates on the valve body 27.
  • the second valve seat 57 is adjacent to an Diameter expanded pressure chamber 59 in the valve body 27, which along the first valve member 37 in the Guide bore 35 up to the first valve seat 41 extends.
  • a second one Valve spring 61 clamped, which the second valve member 53 in System on the second valve seat 57 keeps pressed.
  • one Cross bore 63 in the wall of the first valve member 37 provided the pressure chamber 59 with which the second Valve spring 61 receiving reset space 65 connects.
  • an annular space 67 is arranged, which is connected to the delivery line 13 is connected and via a bore 69 in Valve body 27 is connected to a bag space 71 which along the second valve member 53 to the End of the second valve seat 57 facing away from the pressure chamber 59 extends.
  • Another connecting hole 73 opens from Pump work space 9 of the high pressure pump 1 starting in the Pressure chamber 59 of valve bank 11.
  • the fuel injection device according to the invention works in the following way.
  • the High-pressure pump 1 flows under the pre-delivery pressure Fuel from the fuel tank 15 via the delivery line 13 and the annular space 67 first into the pocket space 71 arises with simultaneous suction stroke movement of the Pump piston 7 towards bottom dead center one Pressure difference between the bag space 71 and the pressure space 59, so that the second valve member 53 counter to the Restoring force of the second valve spring 61 from the second Valve seat 57 lifts off and the fuel from bag space 71 over the opening cross section at the second valve seat 57 in the Pressure chamber 59 and via the connection bore 73 further in the pump work space 9 can flow.
  • the connection of the pressure chamber 59 with the high pressure line 19 is closed by the first valve member 37, the force of the first valve spring 45 being greater than the pressure force of the inflowing fuel is designed.
  • the pressure in the high pressure line 19 acts Closing direction of the first valve member 37.
  • the second valve member 53 becomes an additional force the second valve spring 61, which is under high pressure, via the transverse bore 63 into the reset space 65 fuel flowing into the second valve seat 57 pressed so that the second valve member 53 despite the axial Opening stroke movement of the first valve member 37 safely in System remains on the second valve seat 57 and so on Backflow of fuel into the delivery line 13 prevented.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

Dispositif d'injection de carburant pour moteurs à combustion interne, qui comprend une pompe à haute pression (1) dont la chambre de travail (9) peut être reliée, du côté alimentation, par un tuyau d'alimentation (13) à un réservoir de carburant (15) et, du côté pression, par un tuyau haute pression (19) à un collecteur haute pression (21), à partir duquel une pluralité de tuyaux d'injection (23) conduisent aux différentes soupapes d'injection (25). Le dispositif comprend également une soupape de pression placée dans le tuyau d'alimentation (13) et une soupape de pression placée dans le tuyau haute pression (19). Les soupapes de pression empêchent le carburant de revenir depuis la chambre de travail de la pompe (9) dans le tuyau d'alimentation (13), et depuis le tuyau haute pression (19) dans la chambre de travail de la pompe (9). La soupape de pression du tuyau d'alimentation (13) et la soupape de pression du tuyau haute pression (19) sont disposées dans une unité de soupapes compacte commune (11).

Claims (8)

  1. Installation d'injection de carburant pour des moteurs à combustion interne comprenant une pompe à haute pression (1) dont la chambre de travail (9) est reliée du côté aspiration par une conduite d'alimentation (13) à un réservoir de carburant (15) et du côté refoulement, par une conduite de haute pression (19) à une chambre accumulatrice à haute pression (21) d'où partent plusieurs conduites d'injection (23) reliées aux différents injecteurs (25) et des soupapes de pression placées chaque fois dans la conduite d'alimentation et dans la conduite de haute pression (19), ces soupapes étant réunies en un ensemble commun (11) pour éviter un retour du carburant de la chambre de travail (9) de la pompe dans la conduite d'alimentation (13) et de la conduite haute pression (19) dans la chambre de travail (9) de la pompe, les soupapes de pression de la conduite d'alimentation (13) et de la conduite haute pression (19) étant regroupées en un ensemble commun (11),
    caractérisé en ce que
    l'ensemble à soupape (11) se compose d'un corps de soupape (27) placé dans un alésage du corps de pompe (3) et d'un ajutage de branchement (33) serrant celui-ci axialement contre une butée (29), cet ajutage formant la conduite haute pression (19),
    et d'un perçage de guidage (35) du corps de soupape (27) pour guider axialement un premier organe d'obturation (37) comportant une surface d'étanchéité (39) par laquelle il coopère avec un premier siège de soupape (41) du corps (27) et un second organe d'obturation (53), guidé axialement dans un perçage borgne (51) du premier organe d'obturation (37) et ayant une surface d'étanchéité (55) par laquelle il coopère avec un second siège de soupape (57) du corps de soupape (27).
  2. Installation d'injection de carburant selon la revendication 1,
    caractérisée en ce que
    le premier organe d'obturation (37) pénètre avec l'une de ses extrémités dans un perçage traversant (43) de l'ajutage (33), de façon adjacente au premier siège de soupape (41); ajutage dans lequel se trouve un premier ressort de soupape (45) serré entre le premier organe d'obturation (37) et un décrochement du perçage traversant (43), ce ressort poussant le premier organe d'obturation (37) en appui contre le premier siège de soupape (41).
  3. Installation d'injection de carburant selon la revendication 2,
    caractérisée en ce qu'
    entre l'extrémité du second organe d'obturation (53) qui pénètre dans le perçage borgne (51) du premier organe d'obturation (37) et la paroi fermée du perçage borgne (51) on a un second ressort (61) qui pousse le second organe d'obturation (53) contre le second siège de soupape (57).
  4. Installation d'injection de carburant selon la revendication 3,
    caractérisée par
    un volume annulaire (67) entre le corps (27) et la paroi du boítier de pompe (3) dans lequel débouche la conduite d'alimentation (13) et ce volume annulaire est relié par un perçage (69) au perçage borgne (71) du corps de soupape (27) arrivant jusqu'au niveau du second siège de soupape (57).
  5. Installation d'injection de carburant selon la revendication 4,
    caractérisée par
    une chambre de pression (59) adjacente à l'extrémité du second siège de soupape (57), du côté opposé au perçage borgne (71), cette chambre de pression étant reliée en permanence par un perçage de liaison (73) à la chambre de travail (9) de la pompe et ce perçage s'étend le long du premier organe d'obturation (37) jusqu'au niveau du premier siège de soupape (41).
  6. Installation d'injection de carburant selon la revendication 5,
    caractérisée en ce que
    le premier organe d'obturation (37) comporte un perçage transversal (63) partant de la chambre de pression (59) et débouchant dans l'extrémité fermée du perçage borgne (51).
  7. Installation d'injection de carburant selon la revendication 1,
    caractérisée en ce que
    le premier et le second siège de soupape (41, 57) du corps de soupape (27) et les surfaces d'étanchéité (39, 55) du premier et du second organe d'obturation (37, 53) qui coopèrent avec le premier et le second siège de soupape ont une forme conique.
  8. Installation d'injection de carburant selon la revendication 1,
    caractérisée en ce que
    les soupapes de pression de la conduite haute pression (19) et de la conduite d'alimentation (13) sont réalisées sous la forme d'une soupape anti-retour.
EP19960934351 1995-11-08 1996-08-09 Dispositif d'injection de carburant pour moteurs a combustion interne Expired - Lifetime EP0801710B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE1995141507 DE19541507A1 (de) 1995-11-08 1995-11-08 Kraftstoffeinspritzeinrichtung für Brennkraftmaschinen
DE19541507 1995-11-08
PCT/DE1996/001497 WO1997017538A1 (fr) 1995-11-08 1996-08-09 Dispositif d'injection de carburant pour moteurs a combustion interne

Publications (2)

Publication Number Publication Date
EP0801710A1 EP0801710A1 (fr) 1997-10-22
EP0801710B1 true EP0801710B1 (fr) 2002-03-06

Family

ID=7776849

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19960934351 Expired - Lifetime EP0801710B1 (fr) 1995-11-08 1996-08-09 Dispositif d'injection de carburant pour moteurs a combustion interne

Country Status (8)

Country Link
US (1) US5839414A (fr)
EP (1) EP0801710B1 (fr)
JP (1) JP3830524B2 (fr)
KR (1) KR100445715B1 (fr)
BR (1) BR9606893A (fr)
DE (2) DE19541507A1 (fr)
RU (1) RU2170363C2 (fr)
WO (1) WO1997017538A1 (fr)

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DE19710891A1 (de) * 1997-03-15 1998-09-17 Bosch Gmbh Robert Druckventil
DE19919430C1 (de) * 1999-04-29 2000-10-19 Bosch Gmbh Robert Einspritzpumpe
DE10059425A1 (de) * 2000-11-30 2002-06-06 Bosch Gmbh Robert Kraftstoffeinspritzpumpe für Brennkraftmaschinen, insbesondere Dieselmotoren
DE10129308C1 (de) * 2001-06-18 2002-11-28 Man B & W Diesel As Kopenhagen Vorrichtung zur Brennstoffversorgung von Brennkraftmaschinen
DE10136925C1 (de) * 2001-07-30 2002-12-12 Orange Gmbh Kraftstoff-Einspritzeinrichtung für Brennkraftmaschinen
DE10136926C1 (de) * 2001-07-30 2003-01-16 Orange Gmbh Kraftstoff-Einspritzeinrichtung für Brennkraftmaschinen
DE10220281A1 (de) * 2002-05-07 2003-11-27 Bosch Gmbh Robert Kraftstoffpumpe, insbesondere für eine Brennkraftmaschine mit Direkteinspritzung
US7086388B2 (en) * 2003-08-04 2006-08-08 Delphi Technologies, Inc. Combination valve for fuel system
DE10357612A1 (de) * 2003-12-10 2005-07-07 Robert Bosch Gmbh Ventilanordnung, insbesondere Einlassventil einer Hochdruck-Kraftstoffpumpe
JP2006183647A (ja) * 2004-12-28 2006-07-13 Bosch Corp 燃料供給ポンプ
US7412971B2 (en) * 2005-01-27 2008-08-19 Advanced Global Equities And Intellectual Properties, Inc. Selectively detachable helix ring for a fuel injector
JP2008215148A (ja) * 2007-03-01 2008-09-18 Yanmar Co Ltd サプライポンプ
US7628140B2 (en) * 2007-09-27 2009-12-08 Caterpillar Inc. High-pressure pump or injector plug or guide with decoupled sealing land
DE102009027273A1 (de) 2009-06-29 2010-12-30 Robert Bosch Gmbh Hochdruckpumpe
US8132558B2 (en) * 2009-12-01 2012-03-13 Stanadyne Corporation Common rail fuel pump with combined discharge and overpressure relief valves
US8997716B2 (en) * 2010-11-15 2015-04-07 Governors America Corp. Controlled nozzle injection method and apparatus
JP5653288B2 (ja) * 2011-04-27 2015-01-14 株式会社デンソー 定残圧弁
US9464631B2 (en) * 2013-01-08 2016-10-11 Cummins Inc. Fuel pump for an internal combustion engine
CN104018968B (zh) * 2013-03-01 2019-04-23 罗伯特·博世有限公司 高压供油泵以及具有这种高压供油泵的柴油机
DE102013209021A1 (de) * 2013-05-15 2014-11-20 Robert Bosch Gmbh Pumpe, insbesondere Kraftstoffhochdruckpumpe einer Brennkraftmaschine
DE102013226953B4 (de) 2013-12-20 2016-10-06 Robert Bosch Gmbh Hochdruckpumpe mit einem Ventilstück
CN206320002U (zh) * 2016-10-14 2017-07-11 罗伯特·博世有限公司 柱塞式高压泵及其高压组件、进油阀
US11015558B2 (en) * 2019-02-15 2021-05-25 Delphi Technologies Ip Limited Combination outlet valve and pressure relief valve and fuel pump using the same
CN110529315B (zh) * 2019-08-06 2021-03-19 一汽解放汽车有限公司 一种进油阀、高压油泵及发动机
US10907600B1 (en) * 2019-12-16 2021-02-02 Delphi Technologies Ip Limited Fuel pump and outlet valve seat thereof
US11352994B1 (en) 2021-01-12 2022-06-07 Delphi Technologies Ip Limited Fuel pump and combination outlet and pressure relief valve thereof

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Also Published As

Publication number Publication date
KR100445715B1 (ko) 2004-11-06
JPH10512649A (ja) 1998-12-02
US5839414A (en) 1998-11-24
RU2170363C2 (ru) 2001-07-10
JP3830524B2 (ja) 2006-10-04
BR9606893A (pt) 1997-10-28
EP0801710A1 (fr) 1997-10-22
DE19541507A1 (de) 1997-05-15
KR19980701251A (ko) 1998-05-15
DE59608839D1 (de) 2002-04-11
WO1997017538A1 (fr) 1997-05-15

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