EP1117926A1 - Accumulateur de carburant haute pression - Google Patents

Accumulateur de carburant haute pression

Info

Publication number
EP1117926A1
EP1117926A1 EP00962183A EP00962183A EP1117926A1 EP 1117926 A1 EP1117926 A1 EP 1117926A1 EP 00962183 A EP00962183 A EP 00962183A EP 00962183 A EP00962183 A EP 00962183A EP 1117926 A1 EP1117926 A1 EP 1117926A1
Authority
EP
European Patent Office
Prior art keywords
blind hole
pressure fuel
pressure
fuel
high 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.)
Withdrawn
Application number
EP00962183A
Other languages
German (de)
English (en)
Inventor
Kurt Frank
Steffen Jung
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 EP1117926A1 publication Critical patent/EP1117926A1/fr
Withdrawn legal-status Critical Current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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/02—Conduits between injection pumps and injectors, e.g. conduits between pump and common-rail or conduits between common-rail and injectors
    • 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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/02—Conduits between injection pumps and injectors, e.g. conduits between pump and common-rail or conduits between common-rail and injectors
    • F02M55/025—Common rails

Definitions

  • the invention relates to a high-pressure fuel accumulator for a common rail fuel injection system of an internal combustion engine, having a tubular base body which has a blind hole running in the longitudinal direction and a plurality of connections.
  • Such a high-pressure fuel accumulator is e.g. described in DE 195 48 611.
  • a high-pressure pump possibly with the aid of a prefeed pump, conveys the fuel to be injected from a tank into the central high-pressure fuel reservoir, which is referred to as the common rail.
  • Fuel lines lead from the rail to the individual injectors, which are assigned to the cylinders of the internal combustion engine. The injectors are dependent on the
  • the object of the invention is a
  • high-pressure fuel accumulators of the type described in the introduction in such a way that the high-pressure strength is improved and the service life is extended.
  • the high-pressure fuel reservoir according to the invention should be simple in construction and inexpensive to produce.
  • a high-pressure fuel accumulator for a common rail fuel injection system of an internal combustion engine, with a tubular base body which has a longitudinal blind bore and several connections, in that a sealing plug is arranged in the closed end of the blind bore.
  • the sealing plug serves to seal the geometry produced by the drilling tool, which is unfavorable with regard to high-pressure strength, at the closed end of the blind hole against the section of the blind hole which is used to hold the fuel.
  • This provides the advantage that the geometry, which is unfavorable with regard to high-pressure strength, does not have to be reworked mechanically at the closed end of the blind hole.
  • the sealing plug also provides fluidic advantages that are noticeable in the operation of the high-pressure fuel accumulator.
  • a special embodiment of the invention is characterized in that the blind hole has a smaller diameter at its closed end than in the section of the blind hole used to hold the fuel.
  • the blind hole has a smaller diameter at its closed end than in the section of the blind hole used to hold the fuel.
  • the sealing plug has the shape of a ball.
  • the sealing plug can also have the shape of a circular cylinder, among other things.
  • the sealing plug twists or cant in the blind hole.
  • the ball shape makes it easier to insert the ball, particularly in the case of a stepped blind hole.
  • a further special embodiment of the invention is characterized in that the sealing plug is pressed into the closed end of the blind hole. It is also possible to e.g. with the help of a thread or a separate fixing device in the closed end of the blind hole. In contrast, the pressing in has the advantage that no additional individual parts are required and the manufacturing effort is low.
  • Another special embodiment of the invention is characterized in that the open end of the blind hole is closed by a pressure sensor. This provides the advantage that no additional high pressure seal is required for the pressure sensor. A plug for the open end of the blind hole can be omitted.
  • FIG. 1 an embodiment of a high-pressure fuel accumulator according to the invention is shown in longitudinal section.
  • the high-pressure fuel reservoir shown comprises a tubular base body 1.
  • a blind hole bore 2 extends in the axial direction in the tubular base body 1.
  • the blind bore bore 2 comprises a section 3 with a larger diameter and a section 4 with a smaller diameter.
  • the double tip 5 of a deep drill is shown at the closed end of section 4 of the blind hole 2.
  • the resulting annular depression in the bottom of the bore is unfavorable from a fluidic point of view and with regard to the high pressure resistance.
  • the geometry created by a normal 120 ° bit tip behaves better, but overall it is also unfavorable. Therefore, the bottom of the hole, e.g. can be reworked by rounding.
  • a closure ball 6 is tightly pressed into section 4 of the blind hole 2.
  • the sealing ball 6 protects the end region of the blind hole 2, which is unfavorable with regard to the high pressure resistance.
  • no mechanical finishing in the form of rounding has to be carried out in this critical region.
  • the high-pressure fuel reservoir according to the invention achieves very good high-pressure resistance.
  • a pressure sensor 8 is inserted in a high pressure-tight manner. This keeps the number of high pressure seals small.
  • the high pressure seals are usually critical with regard to their tightness and require a high
  • High-pressure fuel storage as a blind hole saves a high-pressure sealing point compared to a high-pressure fuel storage with a through hole, which is closed by two sealing plugs.
  • connections 10, 11, 12 and 13 for high-pressure fuel lines are formed on the tubular base body 1 of the high-pressure fuel reservoir according to the invention.
  • the high-pressure fuel lines create a connection between the high-pressure fuel reservoir and a high-pressure fuel pump (not shown) and injectors (not shown).
  • fastening elements 14, 15 and 16 are formed on the tubular base body 1.
  • the fastening elements 14, 15 and 16 serve to mount the high-pressure fuel accumulator according to the invention on the internal combustion engine.

Landscapes

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

Abstract

L'invention concerne un accumulateur de carburant haute pression pour le système d'injection de carburant à rampe commune d'un moteur à combustion interne, qui comprend un corps de base (1) tubulaire qui présente un alésage borgne (2) s'étendant dans le sens longitudinal et plusieurs raccords (10 à 13). Pour que la résistance aux pressions élevées soit augmentée et que la durée de vie de l'accumulateur de carburant haute pression soit prolongée, un bouchon de fermeture (6) est placé dans l'extrémité fermée de l'alésage borgne (2).
EP00962183A 1999-08-03 2000-08-01 Accumulateur de carburant haute pression Withdrawn EP1117926A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19936533A DE19936533A1 (de) 1999-08-03 1999-08-03 Kraftstoffhochdruckspeicher
DE19936533 1999-08-03
PCT/DE2000/002531 WO2001009507A1 (fr) 1999-08-03 2000-08-01 Accumulateur de carburant haute pression

Publications (1)

Publication Number Publication Date
EP1117926A1 true EP1117926A1 (fr) 2001-07-25

Family

ID=7917043

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00962183A Withdrawn EP1117926A1 (fr) 1999-08-03 2000-08-01 Accumulateur de carburant haute pression

Country Status (7)

Country Link
US (1) US6488011B1 (fr)
EP (1) EP1117926A1 (fr)
JP (1) JP2003506612A (fr)
KR (1) KR20010075540A (fr)
CZ (1) CZ20011141A3 (fr)
DE (1) DE19936533A1 (fr)
WO (1) WO2001009507A1 (fr)

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10132245A1 (de) 2001-07-04 2003-01-23 Bosch Gmbh Robert Druckfester Hochdrucksammelraum
DE10140057B4 (de) 2001-08-16 2007-08-30 Robert Bosch Gmbh Kraftstoffhochdruckspeicher
DE10140058A1 (de) * 2001-08-16 2002-10-24 Bosch Gmbh Robert Verfahren zur Herstellung eines Kraftstoffhochdruckspeichers
JP3856206B2 (ja) * 2001-11-06 2006-12-13 株式会社デンソー 蓄圧容器およびその製造方法
DE10304961B3 (de) * 2003-02-06 2004-08-19 Robert Bosch Gmbh Verfahren zur Herstellung eines Kraftstoffhochdruckspeichers
DE10309311B4 (de) 2003-03-04 2005-01-05 Siemens Ag Kraftstoffhockdruckspeicher
JP4209399B2 (ja) * 2005-02-25 2009-01-14 三菱重工業株式会社 蓄圧式燃料噴射装置
EP1741923B1 (fr) * 2005-07-08 2009-09-02 C.R.F. Societa Consortile per Azioni Système de connexion d'une rampe tubulaire pour carburant à haute pression
DE102007034720A1 (de) 2007-07-23 2009-01-29 Robert Bosch Gmbh Kraftstoffhochdruckspeicher
DE102008035491B4 (de) 2008-07-30 2022-10-27 Mercedes-Benz Group AG Railbaugruppe einer Kraftstoffeinspritzanlage
DE102008035462B4 (de) 2008-07-30 2022-10-27 Mercedes-Benz Group AG Railbaugruppe einer Kraftstoffeinspritzanlage
US8622046B2 (en) 2010-06-25 2014-01-07 Caterpillar Inc. Fuel system having accumulators and flow limiters
DE102010040541A1 (de) * 2010-09-10 2012-03-15 Robert Bosch Gmbh Kraftstoffspeicherblock zur Prüfung von Hochdruckkomponenten von Kraftstoffeinspritzeinrichtungen
CN102536998A (zh) * 2010-12-07 2012-07-04 鸿富锦精密工业（深圳）有限公司 弹簧螺丝
DE102014226819A1 (de) * 2014-12-22 2016-06-23 Robert Bosch Gmbh Einrichtung einer Brennstoffeinspritzanlage und metallische dichtende Verbindungsanordnung
JP6546771B2 (ja) * 2015-04-15 2019-07-17 臼井国際産業株式会社 ガソリン直噴レール
DE102018110342B4 (de) * 2018-04-30 2022-09-01 Benteler Automobiltechnik Gmbh Verfahren zur Herstellung eines Kraftstoffverteilers
CN209942990U (zh) * 2018-12-11 2020-01-14 上海威克迈龙川汽车发动机零件有限公司 一种一体式端面密封的分配管
GB2583345B (en) * 2019-04-24 2021-06-09 Delphi Tech Ip Ltd Common rail assembly
DE102019133050A1 (de) * 2019-12-04 2021-06-10 Benteler Automobiltechnik Gmbh Kraftstoffverteiler
KR102258649B1 (ko) * 2019-12-24 2021-06-01 주식회사 현대케피코 연료 레일

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992019859A1 (fr) * 1991-05-09 1992-11-12 Lucas Industries Public Limited Company Injecteur de carburant
JPH08114160A (ja) * 1994-08-25 1996-05-07 Nippondenso Co Ltd 内燃機関用燃料供給装置
DE69619949T2 (de) * 1995-12-19 2002-11-14 Nippon Soken, Inc. Speicherkraftstoffeinspritzvorrichtung
DE19548610A1 (de) 1995-12-23 1997-06-26 Bosch Gmbh Robert Kraftstoffeinspritzeinirchtung für Brennkraftmaschinen
DE29521402U1 (de) * 1995-12-23 1997-04-24 Robert Bosch Gmbh, 70469 Stuttgart Kraftstoffeinspritzsystem
EP0826873B1 (fr) * 1996-08-24 2000-05-24 Volkswagen Aktiengesellschaft Dispositif de distribution de carburant pour un moteur à combustion
DE19744762A1 (de) * 1997-03-18 1998-10-01 Poppe & Potthoff Gmbh & Co Einspritzeinrichtung für einen Dieselmotor
DE19716513C2 (de) * 1997-04-19 1999-02-11 Mtu Friedrichshafen Gmbh Kraftstoffeinspritzsystem für einen Verbrennungsmotor mit einer Common-Rail-Schiene
US5845621A (en) * 1997-06-19 1998-12-08 Siemens Automotive Corporation Bellows pressure pulsation damper
DE19729392C2 (de) * 1997-07-09 1999-05-06 Siemens Ag Kraftstoffspeicher mit Abdichtung
DE19805024A1 (de) * 1998-02-09 1999-08-12 Bosch Gmbh Robert Druckdämpfer für einen Druckbehälter
JP2000120504A (ja) * 1998-10-13 2000-04-25 Nippon Soken Inc 筒内直噴式内燃機関の燃料供給系
JP2001159380A (ja) * 1999-12-03 2001-06-12 Keihin Corp 燃料噴射装置における燃料分配管

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0109507A1 *

Also Published As

Publication number Publication date
CZ20011141A3 (cs) 2002-02-13
WO2001009507A1 (fr) 2001-02-08
KR20010075540A (ko) 2001-08-09
US6488011B1 (en) 2002-12-03
JP2003506612A (ja) 2003-02-18
DE19936533A1 (de) 2001-02-15

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