EP1283956A1 - Systeme d'injection de carburant pour moteurs a combustion interne - Google Patents

Systeme d'injection de carburant pour moteurs a combustion interne

Info

Publication number
EP1283956A1
EP1283956A1 EP01943031A EP01943031A EP1283956A1 EP 1283956 A1 EP1283956 A1 EP 1283956A1 EP 01943031 A EP01943031 A EP 01943031A EP 01943031 A EP01943031 A EP 01943031A EP 1283956 A1 EP1283956 A1 EP 1283956A1
Authority
EP
European Patent Office
Prior art keywords
fuel
pressure pump
injection system
valve
pressure
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
EP01943031A
Other languages
German (de)
English (en)
Other versions
EP1283956B1 (fr
Inventor
Martin Boehm
Rainer Haeberer
Helmut Clauss
Felix LANDHÄUSSER
Markus Rueckle
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 EP1283956A1 publication Critical patent/EP1283956A1/fr
Application granted granted Critical
Publication of EP1283956B1 publication Critical patent/EP1283956B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0012—Valves
    • F02M63/0014—Valves characterised by the valve actuating means
    • F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
    • F02M63/0017—Valves characterised by the valve actuating means electrical, e.g. using solenoid using electromagnetic operating means
    • 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
    • F02M59/20—Varying fuel delivery in quantity or timing
    • F02M59/34—Varying fuel delivery in quantity or timing by throttling of passages to pumping elements or of overflow passages, e.g. throttling by means of a pressure-controlled sliding valve having liquid stop or abutment
    • 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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0012—Valves
    • F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
    • F02M63/004—Sliding valves, e.g. spool valves, i.e. whereby the closing member has a sliding movement along a seat for opening and closing
    • 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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
    • F02M63/0225—Fuel-injection apparatus having a common rail feeding several injectors ; Means for varying pressure in common rails; Pumps feeding common rails

Definitions

  • the invention relates to a fuel injection system for internal combustion engines according to the preamble of claim 1.
  • the subject matter of the main patent is characterized by a fuel metering unit that is able to precisely meter the amount of fuel desired in the respective operating state of the internal combustion engine to the high-pressure pump of the CR system.
  • a fuel metering unit that is able to precisely meter the amount of fuel desired in the respective operating state of the internal combustion engine to the high-pressure pump of the CR system.
  • the main design elements of the main patent are radial control openings in the valve housing and an axial opening that leads to the interior of the sleeve-shaped valve piston.
  • the axial opening connects the Interior of the valve piston with a prefeed pump of the Kraftstoffeinspitzsystems, and the 'radially directed control openings of the valve housing of the high-pressure pump communicating with the low pressure region in hydraulic operative connection.
  • This flow principle is reversed in the other alternative, in that the axial opening is now hydraulically connected to the low-pressure region of the high-pressure pump, while the control openings are connected to the pressure side of the pre-feed pump and thus form the feed into the metering unit.
  • the object of the present invention is to further optimize the latter “reverse” flow principle.
  • valve piston is hydraulically centered in the valve housing over 360 °, in particular if a corresponding annular channel is formed in the valve housing (cf. claim 2). In this way, low-hysteresis and thus optimal sliding of the valve piston in the valve housing is made possible.
  • the invention also proves to be advantageous in terms of production engineering, since it is namely easier and less complex to incorporate the control openings in the valve piston (for example by laser cutting and subsequent deburring) than would be the case in the already expensive valve housing.
  • the application variance of the control openings therefore takes place in the valve piston and not in the cost-intensive valve housing.
  • Fig. 2 shows the ' detail "A" of Fig. 1 in an enlarged view compared to Fig. 1, and
  • Fig. 3 is a diagram in which the fuel flow (Q) is plotted against the magnetic stroke (I).
  • 10 denotes an electromagnet with an integrated control valve 11.
  • the electromagnet 10 has a magnet coil 12, an armature 13 with armature bolts 14 and a magnet pot 15. The latter encloses - partially - the magnet coil 12 and the armature
  • a plug-shaped power connection 101 is provided in a plug housing 100 which is connected in one piece to the magnet pot 15.
  • the electromagnet assembly 10 with integrated control valve 11 is integrated in a high-pressure fuel pump (not shown).
  • An encapsulation 17 ensures optimal heat transfer from the coil 12 to the housing 15.
  • Two sealing points 18, 19 together with the magnetic coil 12 ensure that the magnetic coil winding and contact points of the coil 12 are optimally protected against attacks by corrosive media.
  • the control valve 11 has a valve housing 20 which merges into a flange-like widening 21, which at the same time forms the end of the electromagnet housing 15 at the end.
  • An axial bore 22 is formed in the valve housing 20 and is arranged coaxially with the armature bolt 14 of the electromagnet 10.
  • the axial bore 22 receives a displaceable sleeve-shaped valve piston 23, in the interior 24 of which a compression spring 25 is arranged.
  • the compression spring 25 is supported on the inside on the valve piston 23 and with its other end on a securing element 26 located in the axial bore 22 of the valve housing 20.
  • the valve piston 23 On the outside, the valve piston 23 is in contact with the front end of the anchor bolt 14.
  • the control valve 11 is sealed off from the material of the high-pressure pump (not shown) that has a fuel inlet channel by two sealing rings 27, 28.
  • valve housing 20 has a plurality of radially arranged, preferably oppositely paired inlet openings 32, 33, which are in hydraulic operative connection with a (not shown) feed pump of the fuel injection system.
  • the inlet openings 32, 33 open into an annular channel 34.
  • Radial control openings 35 are arranged in the valve piston 23, which cooperate with the ring channel 34 and the inlet openings 32, 33 by - depending on the position of the valve piston 23 (see here the two possible halves indicated in FIGS Piston positions) - open or close the inlet into the valve interior 22, 24.
  • the fuel that has entered the interior 22, 24 of the valve is discharged in the axial direction (arrow 31) through a stepped bore 36, which is hydraulically connected to the high-pressure pump inlet (low-pressure area of the high-pressure pump).
  • the bore 36 is incorporated in the securing element 26 already mentioned, which forms the lower end of the valve housing 20.
  • Fig. 2 shows the special design of the control opening 35, from which - in cooperation with the lifting movement of the valve piston 23 - the throughput characteristic shown graphically in Fig. 3 results.
  • the control opening 35 preferably has an (upper) slit-shaped and an (lower) approximately rectangular area.
  • the upper end position (open position) of the valve piston 23 - see the right half of the figure in FIG. 2 (or in FIG. 1) - the widened rectangular area of the control opening 35 comes into play.
  • This state is indicated in FIGS. 2 and 3 by an arrow 37.
  • the throughput decreases continuously during the downward movement of the valve piston 23 (cf. the linear curve section 38 in FIG. 3).
  • the throughput has been reduced to zero (see arrows 39 in FIGS. 2 and 3).
  • control opening 35 As an alternative to the geometry of the control opening 35 shown in FIG. 2 and described above, however, different designs of the control opening 35 are still possible. It is conceivable, for example, to design the control opening to be trapezoidal or to follow the characteristic of an e-function and thus others, e.g. to realize linear, throughput characteristics.
  • the throughput characteristic shown in FIG. 3, on the other hand, is characterized by a stepped course.

Landscapes

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

Abstract

L'invention concerne un système d'injection de carburant pour moteurs à combustion interne comprenant un collecteur et une pompe haute pression régulée en fonction du régime du moteur, servant à produire la pression et le débit de carburant requis pour chacun des états de fonctionnement du moteur à combustion interne dans le collecteur. Ledit système comprend également une unité de dosage de carburant associée à la pompe haute pression, à base d'une soupape de régulation (11) à commande électromagnétique. L'unité de dosage de carburant (10,11) est placée dans la pompe haute pression et la sortie de la soupape de régulation (11) débouche dans la zone basse pression de la pompe haute pression. L'entrée (32,43) de la soupape de régulation (11) est reliée au côté refoulement d'une pompe de refoulement. La soupape de régulation (11) présente un piston de soupape (23) pouvant être sollicité par ressort de compression, en position d'ouverture, ledit piston étant actionné par un boulon d'induit (14) du solénoïde (10), à l'encontre de la force du ressort. L'invention se caractérise en ce qu'il est prévu dans le piston de soupape (23), au moins une, de préférence plusieurs ouvertures de commande radiales, coopérant avec le côté admission de la pompe haute pression.
EP01943031A 2000-05-13 2001-05-08 Systeme d'injection de carburant pour moteurs a combustion interne Expired - Lifetime EP1283956B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10023621A DE10023621A1 (de) 2000-05-13 2000-05-13 Kraftstoffeinspritzsystem für Brennkraftmaschinen
DE10023621 2000-05-13
PCT/DE2001/001732 WO2001088368A1 (fr) 2000-05-13 2001-05-08 Systeme d'injection de carburant pour moteurs a combustion interne

Publications (2)

Publication Number Publication Date
EP1283956A1 true EP1283956A1 (fr) 2003-02-19
EP1283956B1 EP1283956B1 (fr) 2006-01-11

Family

ID=7642021

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01943031A Expired - Lifetime EP1283956B1 (fr) 2000-05-13 2001-05-08 Systeme d'injection de carburant pour moteurs a combustion interne

Country Status (9)

Country Link
US (1) US6626151B2 (fr)
EP (1) EP1283956B1 (fr)
JP (1) JP4638649B2 (fr)
KR (1) KR100757225B1 (fr)
CN (1) CN1262756C (fr)
BR (1) BR0106435B1 (fr)
DE (2) DE10023621A1 (fr)
ES (1) ES2255559T3 (fr)
WO (1) WO2001088368A1 (fr)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005299683A (ja) 2001-11-27 2005-10-27 Bosch Corp 液体の流量制御弁および可動子のためのアンカー
DE10297516B4 (de) * 2001-12-11 2008-08-28 Kayaba Industry Co., Ltd. Elektromagnetisches Proportional-Stromregelventil
DE10242219A1 (de) * 2002-09-12 2004-03-25 Robert Bosch Gmbh Kraftstoffzumesseinheit für eine Kraftstoffeinspritzanlage
DE10247774B4 (de) 2002-10-14 2005-09-29 Siemens Ag Volumenstromregelventil
DE10251014A1 (de) * 2002-11-02 2004-05-19 Robert Bosch Gmbh Kraftstoffzumesseinheit für Kraftstoffeinspritzanlagen von Brennkraftmaschinen
JP4045957B2 (ja) * 2003-01-16 2008-02-13 いすゞ自動車株式会社 燃料噴射量制御装置
DE10305947A1 (de) 2003-02-12 2004-08-26 Robert Bosch Gmbh Expansionsorgan für eine Klimaanlage
DE10343480A1 (de) * 2003-09-19 2005-04-14 Robert Bosch Gmbh Kraftstoffeinspritzeinrichtung für eine Brennkraftmaschine
US7387109B2 (en) * 2003-10-21 2008-06-17 Robert Bosch Gmbh High-pressure fuel pump for an internal combustion engine
DE102005012940A1 (de) * 2005-03-21 2006-09-28 Robert Bosch Gmbh Kraftstoffeinspritzeinrichtung für eine Brennkraftmaschine
CN103075285A (zh) * 2013-02-05 2013-05-01 李正富 高压共轨燃油计量阀
CN103147891A (zh) * 2013-04-04 2013-06-12 无锡正大轴承机械制造有限公司 比例电磁阀用阀壳与活塞组合机构
DE102013212121A1 (de) * 2013-06-25 2015-01-08 Robert Bosch Gmbh Kraftstoffzumesseinheit für ein Hochdruckeinspritzsystem
US9488176B2 (en) 2014-04-07 2016-11-08 National Oilwell Varco, L.P. Radial valves and pumps including radial valves
DE102014220222A1 (de) * 2014-10-07 2016-04-07 Robert Bosch Gmbh Elektromagnetisch betätigbares Proportionalventil
DE102014220226A1 (de) * 2014-10-07 2016-04-07 Robert Bosch Gmbh Elektromagnetisch betätigbares Proportionalventil sowie Kraftstoffhochdruckpumpe mit einem solchen Proportionalventil
CN104455655B (zh) * 2014-11-25 2017-01-04 北京亚新科天纬油泵油嘴股份有限公司 一种比例电磁阀阀芯及应用该阀芯的比例电磁阀
CN104895718A (zh) * 2015-05-21 2015-09-09 山东菏泽华星油泵油嘴有限公司 新式电控单体泵内部缓冲结构
WO2019065998A1 (fr) * 2017-09-29 2019-04-04 株式会社デンソー Pompe à haute pression
JP6708238B2 (ja) * 2017-09-29 2020-06-10 株式会社デンソー 高圧ポンプ

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FR1094136A (fr) * 1953-03-05 1955-05-13 Daimler Benz Ag Pompe à piston pour l'injection de carburant
CA1047863A (fr) * 1973-10-03 1979-02-06 Hansueli Bart Soupape de dosage pour injecteur de combustible
US4168688A (en) 1973-10-03 1979-09-25 Eaton Corporation Metering valve for fuel injection
JPS60228733A (ja) * 1984-04-25 1985-11-14 Hitachi Ltd 速動式電磁計量弁
US5099814A (en) * 1989-11-20 1992-03-31 General Motors Corporation Fuel distributing and injector pump with electronic control
DE4142998C1 (fr) * 1991-12-24 1993-07-22 Robert Bosch Gmbh, 7000 Stuttgart, De
JP3144136B2 (ja) * 1993-03-31 2001-03-12 株式会社デンソー 三方電磁弁
FR2741672A1 (fr) * 1995-11-29 1997-05-30 Lucas Ind Plc Systeme d'alimentation de carburant
DE19549108A1 (de) 1995-12-29 1997-07-03 Bosch Gmbh Robert System zur Kraftstoffhochdruckerzeugung für ein in Brennkraftmaschinen eingesetztes Kraftstoffeinspritzsystem
DE19645308A1 (de) * 1996-11-04 1998-05-07 Bosch Gmbh Robert Elektrisch gesteuertes Ventil
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IT1319838B1 (it) * 2000-02-15 2003-11-03 Elasis Sistema Ricerca Fiat Perfezionamenti di un'elettrovalvola per la regolazione dellapressione di alimentazione di combustibile ad un motore a combustione

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Also Published As

Publication number Publication date
BR0106435A (pt) 2002-04-16
CN1380941A (zh) 2002-11-20
WO2001088368A1 (fr) 2001-11-22
KR20020032527A (ko) 2002-05-03
JP2003533638A (ja) 2003-11-11
ES2255559T3 (es) 2006-07-01
DE10023621A1 (de) 2001-11-15
KR100757225B1 (ko) 2007-09-11
US20020134355A1 (en) 2002-09-26
EP1283956B1 (fr) 2006-01-11
JP4638649B2 (ja) 2011-02-23
DE50108673D1 (de) 2006-04-06
US6626151B2 (en) 2003-09-30
BR0106435B1 (pt) 2009-08-11
CN1262756C (zh) 2006-07-05

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