ATE492720T1 - FUEL INJECTION SYSTEM WITH REDUCED PRESSURE VIBRATIONS IN THE RETURN RAIL - Google Patents

FUEL INJECTION SYSTEM WITH REDUCED PRESSURE VIBRATIONS IN THE RETURN RAIL

Info

Publication number
ATE492720T1
ATE492720T1 AT04729610T AT04729610T ATE492720T1 AT E492720 T1 ATE492720 T1 AT E492720T1 AT 04729610 T AT04729610 T AT 04729610T AT 04729610 T AT04729610 T AT 04729610T AT E492720 T1 ATE492720 T1 AT E492720T1
Authority
AT
Austria
Prior art keywords
pressure
fuel
injector
holding valve
injection system
Prior art date
Application number
AT04729610T
Other languages
German (de)
Inventor
Patrick Mattes
Wolfgang Stoecklein
Holger Rapp
Hans Brekle
Markus Erhardt
Original Assignee
Bosch Gmbh Robert
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 Bosch Gmbh Robert filed Critical Bosch Gmbh Robert
Application granted granted Critical
Publication of ATE492720T1 publication Critical patent/ATE492720T1/en

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
    • 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
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/46—Details, component parts or accessories not provided for in, or of interest apart from, the apparatus covered by groups F02M69/02 - F02M69/44
    • F02M69/54—Arrangement of fuel pressure regulators
    • 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
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/0047—Layout or arrangement of systems for feeding fuel
    • F02M37/0052—Details on the fuel return circuit; Arrangement of pressure regulators
    • 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
    • F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
    • F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
    • 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
    • F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
    • F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
    • F02M47/027—Electrically actuated valves draining the chamber to release the closing pressure
    • 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
    • F02M55/002—Arrangement of leakage or drain conduits in or from 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
    • F02M55/04—Means for damping vibrations or pressure fluctuations in injection pump inlets or outlets
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/04—Fuel-injection apparatus having means for avoiding effect of cavitation, e.g. erosion
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/28—Details of throttles in fuel-injection apparatus
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/30—Fuel-injection apparatus having mechanical parts, the movement of which is damped
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/31—Fuel-injection apparatus having hydraulic pressure fluctuations damping elements
    • F02M2200/315—Fuel-injection apparatus having hydraulic pressure fluctuations damping elements for damping fuel pressure fluctuations
    • 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
    • F02M57/00—Fuel-injectors combined or associated with other devices
    • F02M57/02—Injectors structurally combined with fuel-injection pumps

Landscapes

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

Abstract

The invention relates to a fuel-injection system (1) for an internal combustion engine, comprising: at least one injector (3) for injecting fuel into a combustion chamber of a motor, said injector having a high-pressure connection (10), via which it receives a supply of fuel at high pressure, a control valve (64) for controlling the injections of the injector and a low-pressure connection (12) for discharging a controlled quantity of fuel that is accumulated during the control of the injection; and a leakage line (11), which is connected to a fuel-return line (17) by the interposition of a pressure-holding valve (15), which opens in the direction of the fuel-return line when a predefined pressure is exceeded. Said system is characterised in that it is equipped with a throttle device (20) in the vicinity of the pressure-holding valve (15), said device being configured and located in such a way that when the pressure-holding valve is open, a reflection of pressure waves emanating from the injector in the form of negative-pressure waves is damped. Negative-pressure waves emanating from the pressure-holding valve towards the leakage line of the injector are damped or prevented. This reduces the risk of damage caused by cavitation.
AT04729610T 2003-06-21 2004-04-27 FUEL INJECTION SYSTEM WITH REDUCED PRESSURE VIBRATIONS IN THE RETURN RAIL ATE492720T1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10328000A DE10328000A1 (en) 2003-06-21 2003-06-21 Fuel injection system with reduced pressure oscillations in the return rail
PCT/DE2004/000881 WO2005001280A1 (en) 2003-06-21 2004-04-27 Fuel-injection system with reduced pressure pulsations in the return rail

Publications (1)

Publication Number Publication Date
ATE492720T1 true ATE492720T1 (en) 2011-01-15

Family

ID=33520775

Family Applications (1)

Application Number Title Priority Date Filing Date
AT04729610T ATE492720T1 (en) 2003-06-21 2004-04-27 FUEL INJECTION SYSTEM WITH REDUCED PRESSURE VIBRATIONS IN THE RETURN RAIL

Country Status (6)

Country Link
EP (1) EP1727978B1 (en)
JP (1) JP2006523793A (en)
KR (1) KR20060028699A (en)
AT (1) ATE492720T1 (en)
DE (2) DE10328000A1 (en)
WO (1) WO2005001280A1 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007239536A (en) * 2006-03-07 2007-09-20 Denso Corp Supply pump
JP4793315B2 (en) * 2006-07-20 2011-10-12 株式会社デンソー Fuel injection device
FR2923271A1 (en) * 2007-11-07 2009-05-08 Renault Sas Fuel injecting device for internal combustion engine, has fuel return circuit with upstream and downstream sections located at both sides of fuel passage sections, which are reduced relative to upstream sections and downstream sections
EP2280161A4 (en) 2008-04-10 2013-07-10 Bosch Corp Injection abnormality detection system and common-rail fuel injection controller
EP2249021A1 (en) * 2009-05-06 2010-11-10 Delphi Technologies Holding S.à.r.l. Fuel Delivery System
US8302622B2 (en) 2010-02-24 2012-11-06 Continental Automotive Systems Us, Inc. Unbalanced inlet fuel tube for a fuel pressure regulator
JP2020143584A (en) * 2019-03-04 2020-09-10 株式会社デンソー Pressure control unit

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2890718B2 (en) * 1990-07-12 1999-05-17 株式会社デンソー Fuel injector safety valve
EP0780569B1 (en) 1995-12-19 2002-03-20 Nippon Soken, Inc. Accumulator fuel injection device
JPH11257188A (en) * 1998-03-10 1999-09-21 Hitachi Ltd Fuel return valve
GB9822653D0 (en) * 1998-10-17 1998-12-09 Lucas Ind Plc Fuel system
DE19927804A1 (en) * 1999-06-18 2000-12-28 Bosch Gmbh Robert Fuel supply system for internal combustion engine has relief device that is connected to pressure line and contains mechanically or hydraulically switchable artificial load
DE19952513A1 (en) * 1999-10-30 2001-06-07 Bosch Gmbh Robert Fuel injection system for internal combustion engines with constant leakage oil pressure in the injector
DE10046662B4 (en) * 2000-09-20 2004-09-30 Robert Bosch Gmbh Fuel injection valve with a pressure control valve
JP2002235635A (en) * 2001-02-13 2002-08-23 Denso Corp Accumulator fuel injection device
DE10157884B4 (en) * 2000-11-27 2013-05-08 Denso Corporation Accumulator fuel injection system for avoiding a malfunction of a relief valve, which is caused by pressure pulsation
JP2002161829A (en) * 2000-11-27 2002-06-07 Denso Corp Accumulator fuel injector
DE10104634A1 (en) * 2001-02-02 2002-09-19 Bosch Gmbh Robert Fuel injection system has collector line used as pressure store
JP2003021017A (en) * 2001-07-10 2003-01-24 Bosch Automotive Systems Corp Accumulator fuel injection device
DE10157411A1 (en) * 2001-11-23 2003-06-26 Bosch Gmbh Robert High pressure fuel injector
JP3786002B2 (en) * 2001-12-14 2006-06-14 トヨタ自動車株式会社 High pressure fuel supply device for internal combustion engine

Also Published As

Publication number Publication date
DE502004012034D1 (en) 2011-02-03
DE10328000A1 (en) 2005-01-13
WO2005001280A1 (en) 2005-01-06
KR20060028699A (en) 2006-03-31
JP2006523793A (en) 2006-10-19
EP1727978B1 (en) 2010-12-22
EP1727978A1 (en) 2006-12-06

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