EP3032086A1 - Agencement d'injection de carburant - Google Patents

Agencement d'injection de carburant Download PDF

Info

Publication number
EP3032086A1
EP3032086A1 EP14196724.0A EP14196724A EP3032086A1 EP 3032086 A1 EP3032086 A1 EP 3032086A1 EP 14196724 A EP14196724 A EP 14196724A EP 3032086 A1 EP3032086 A1 EP 3032086A1
Authority
EP
European Patent Office
Prior art keywords
fuel injection
fuel
engine
line
branch line
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Withdrawn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
EP14196724.0A
Other languages
German (de)
English (en)
Inventor
Jaakko Koivula
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.)
Wartsila Finland Oy
Original Assignee
Wartsila Finland Oy
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 Wartsila Finland Oy filed Critical Wartsila Finland Oy
Priority to EP14196724.0A priority Critical patent/EP3032086A1/fr
Publication of EP3032086A1 publication Critical patent/EP3032086A1/fr
Withdrawn legal-status Critical Current

Links

Images

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
    • F02M55/002—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
    • F02M57/00—Fuel-injectors combined or associated with other devices
    • F02M57/02—Injectors structurally combined with fuel-injection pumps
    • 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
    • F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
    • F02M59/025—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by a single piston
    • F02M59/027—Unit-pumps, i.e. single piston and cylinder pump-units, e.g. for cooperating with a camshaft
    • 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

Definitions

  • the present invention relates to a fuel injection arrangement for a piston engine in accordance with the preamble of claim 1.
  • the fuel injection systems of compression ignition piston engines can be divided into common rail systems and systems that comprise a separate fuel injection pump for each cylinder of the engine.
  • fuel pressurized by a high-pressure pump is supplied into a storage, from which it can be fed to several cylinders of the engine.
  • the amount of the injected fuel and the fuel injection timing is controlled by the fuel injectors, which are usually electrically controlled.
  • each cylinder of the engine is provided with an own fuel injection pump, which also controls the amount of the fuel to be injected and the fuel injection timing.
  • the fuel injectors are opened by the pressure of the fuel.
  • a feed pump supplies fuel to the fuel injection pumps.
  • pressure peaks occur in the low pressure part of the fuel injection system, i.e. in the fuel supply line and in the return line that collects clean excess fuel from the fuel injection pumps.
  • Pressure peaks can be lowered by using large diameter pipes, but this is not always sufficient and often leads to a need to provide the pipes with pulsation dampers. Often several different pulsation dampers need to be used. This increases the costs and the need for service.
  • the object of the present invention is to provide an improved fuel injection arrangement for a piston engine.
  • the fuel injection arrangement comprises a number of fuel injection pumps, each fuel injection pump being configured to inject liquid fuel into a cylinder of the engine, at least one feed pump for supplying fuel to the fuel injection pumps, a fuel supply line connecting the fuel injection pumps to the feed pump, and a return line for receiving excess fuel from the fuel injection pumps.
  • the characterizing features of the fuel injection arrangement according to the invention are given in the characterizing part of claim 1.
  • the fuel injection arrangement is provided with a branch line having a first end and a second end, the first end being connected to the return line and the second end being closed.
  • the arrangement according to the invention effectively reduces pulsations in the fuel injection system.
  • the reliability of the engine and the lifetime of the components can thus be increased.
  • the need for more expensive pulsation dampers can be avoided and manufacturing costs can thus be reduced.
  • the feeding pressure and circulation flow can be reduced. This can lead to higher efficiency of the overall system.
  • the return line can be provided with pressure regulating means, in which case the branch line is connected to the return line upstream from the pressure regulating means.
  • the pressure regulating means can be a pressure regulating valve.
  • the inner diameter of the branch line is 30 to 200 percent of the inner diameter of the return line.
  • FIG 1 is shown schematically a fuel injection system of a piston engine.
  • the engine is a large internal combustion engine, such as a main or an auxiliary engine of a ship or an engine that is used at a power plant for producing electricity.
  • the fuel injection system is configured for a four-cylinder engine, but the invention is applicable to engines with any number of cylinders.
  • the cylinders are arranged in line, but the invention is also suitable for V-engines and other cylinder configurations.
  • the fuel injection system of figure 1 is configured to inject liquid fuel directly into the cylinders of the engine.
  • the fuel can be, for instance, light fuel oil (LFO), heavy fuel oil (HFO), marine gas oil (MGO), crude oil or marine diesel oil (MDO).
  • the engine can be provided with additional fuel injection systems, such as a gas injection system for introducing gaseous fuel into the engine and a pilot fuel injection system for introducing liquid pilot fuel into the cylinders when the engine is operated using a gaseous main fuel.
  • the fuel injection system of figure 1 comprises a number of fuel injection pumps 1.
  • One fuel injection pump 1 is provided for each cylinder of the engine.
  • the fuel injection pumps 1 are conventional fuel injection pumps, which are preferably cam-operated.
  • the fuel injection pumps 1 can also be called as jerk pumps.
  • Each fuel injection pump 1 is connected to a fuel injector 6, which is arranged to inject fuel directly into a cylinder of the engine.
  • Each fuel injector 6 is provided with an injector needle, which is opened by the pressure produced by the fuel injection pump 1.
  • the fuel injectors are thus not electrically controlled, but the fuel injection timing and the amount of the injected fuel is determined by the fuel injection pumps 1.
  • the injection pressure is typically 1000 to 1800 bar.
  • the fuel injection system is provided with a feed pump 2 for supplying fuel from a tank 10 to the fuel injection pumps 1.
  • the feed pump 2 is a low-pressure pump that raises the pressure of the fuel to the range of 5 to 15 bar.
  • a fuel supply line 3 connects the feed pump 2 to the inlets of the fuel injection pumps 1.
  • the fuel injection pump 1 takes in substantially the same amount of fuel. However, the amount of the fuel that is supplied to the fuel injector 6 depends on the load of the engine.
  • the fuel injection system is provided with a return line 4 for receiving the excess fuel that is not supplied to the fuel injector 6. In the embodiment of figure 1 , all the cylinders are connected to the same return line 4.
  • the return line 4 comprises pressure regulating means 8.
  • the pressure regulating means is a pressure regulating valve 8.
  • the pressure regulating valve 8 is a normally closed valve, which is arranged to open when a certain threshold pressure is exceeded. The opening pressure of the pressure regulating valve 8 can be adjusted.
  • the nominal pressure in the return line 4 is kept in the range of 6 to 12 bar. With that nominal pressure, the actual pressure in the return line 4 typically varies in the range of 2 to 20 bar.
  • a throttling device could be arranged in the return line 4 to regulate the pressure.
  • the fuel injection system is further provided with a leakage line 7.
  • the leakage line 7 collects clean fuel leakage from the fuel injectors 6 and the fuel injection pumps 1. The clean leakage is caused by the clearances of the fuel injection pumps 1 and the fuel injectors 6 during normal operation of the engine. The clean fuel leakage can be returned to the tank 10.
  • the engine is also provided with a separate leakage line for dirty fuel (not shown). Via the leakage line for dirty fuel, the fuel that is mixed with other substances can be collected to a separate tank.
  • the fuel injection system is provided with a branch line 5.
  • the branch line 5 is a pipe, which in fluid communication with the return line 4 but closed at the opposite end.
  • the branch line 5 has a first end and a second end.
  • the first end of the branch line 5 is connected to the return line 4 on the upstream side of the pressure regulating valve 8.
  • the branch line 5 is thus in fluid communication with the return line 4.
  • the second end of the branch line 5 is closed.
  • the length of the branch line 5 is selected such that pulsations can be minimized.
  • the length of the branch line 5 depends on the firing frequency.
  • the branch line 5 does not need to be straight, but it can comprise bends.
  • a suitable inner diameter for the branch line 5 is 30 to 200 percent of the inner diameter of the return line 4.
  • the fuel injection system could comprise more than one branch lines 5. For instance, in a V-engine each bank of the engine could be provided with an own branch line 5.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
EP14196724.0A 2014-12-08 2014-12-08 Agencement d'injection de carburant Withdrawn EP3032086A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP14196724.0A EP3032086A1 (fr) 2014-12-08 2014-12-08 Agencement d'injection de carburant

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP14196724.0A EP3032086A1 (fr) 2014-12-08 2014-12-08 Agencement d'injection de carburant

Publications (1)

Publication Number Publication Date
EP3032086A1 true EP3032086A1 (fr) 2016-06-15

Family

ID=52013922

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14196724.0A Withdrawn EP3032086A1 (fr) 2014-12-08 2014-12-08 Agencement d'injection de carburant

Country Status (1)

Country Link
EP (1) EP3032086A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2659713C1 (ru) * 2016-07-06 2018-07-03 федеральное государственное бюджетное образовательное учреждение высшего образования "Московский государственный технический университет имени Н.Э. Баумана" (национальный исследовательский университет)" (МГТУ им. Н.Э. Баумана) Аккумуляторная топливная система дизельного двигателя

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19643295C1 (de) * 1996-10-21 1998-03-26 Bosch Gmbh Robert Brennstoffversorgungssystem
EP1030052A1 (fr) * 1998-11-24 2000-08-23 Institut Francais Du Petrole Système d'injection de carburant sous haute pression dans un moteur à combustion interne à injection directe
US20030200956A1 (en) * 2002-04-26 2003-10-30 Komatsu Ltd. Fuel injection apparatus
FR2929344A3 (fr) * 2008-03-31 2009-10-02 Renault Sas Circuit de retour de carburant pour dispositif d'injection de carburant et dispositif d'injection de carburant associe
EP2230397A1 (fr) * 2003-02-25 2010-09-22 Robert Bosch GmbH Ligne de haute pression pour système d'injection du carburant
WO2012175800A2 (fr) * 2011-06-23 2012-12-27 Wärtsilä Finland Oy Système d'injection de carburant

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19643295C1 (de) * 1996-10-21 1998-03-26 Bosch Gmbh Robert Brennstoffversorgungssystem
EP1030052A1 (fr) * 1998-11-24 2000-08-23 Institut Francais Du Petrole Système d'injection de carburant sous haute pression dans un moteur à combustion interne à injection directe
US20030200956A1 (en) * 2002-04-26 2003-10-30 Komatsu Ltd. Fuel injection apparatus
EP2230397A1 (fr) * 2003-02-25 2010-09-22 Robert Bosch GmbH Ligne de haute pression pour système d'injection du carburant
FR2929344A3 (fr) * 2008-03-31 2009-10-02 Renault Sas Circuit de retour de carburant pour dispositif d'injection de carburant et dispositif d'injection de carburant associe
WO2012175800A2 (fr) * 2011-06-23 2012-12-27 Wärtsilä Finland Oy Système d'injection de carburant

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2659713C1 (ru) * 2016-07-06 2018-07-03 федеральное государственное бюджетное образовательное учреждение высшего образования "Московский государственный технический университет имени Н.Э. Баумана" (национальный исследовательский университет)" (МГТУ им. Н.Э. Баумана) Аккумуляторная топливная система дизельного двигателя

Similar Documents

Publication Publication Date Title
US7107968B2 (en) Control device of high-pressure fuel system of internal combustion engine
EP0959245B1 (fr) Système d'alimentation de carburant
ATE381669T1 (de) Kraftstoffeinspritzeinrichtung für eine brennkraftmaschine
EP3036427B1 (fr) Système d'injection de carburant et procédé d'exploitation d'un moteur à pistons polycarburant
JP2013079594A (ja) コモンレール式燃料噴射システム
US7568471B2 (en) Diesel fuel injection priming system
WO2014199805A1 (fr) Système d'alimentation en carburant mixte pour moteur à combustion interne, véhicule, et procédé d'alimentation en carburant mixte pour moteur à combustion interne
EP3032086A1 (fr) Agencement d'injection de carburant
EP2004986A4 (fr) Système d'injection de carburant
US20040112337A1 (en) Method of injecting fuel into the combustion chambers of an internal combustion engine, and fuel injection system for said engine
JP2006016989A (ja) 内燃機関の燃料供給装置
EP3032091B1 (fr) Agencement d'injection de carburant
US7891341B2 (en) Control device for internal combustion engine
EP2857672A1 (fr) Équipement d'injection de carburant
CN105473843B (zh) 燃料喷射回路和操作多燃料活塞发动机的方法
EP3283755B1 (fr) Système d'injection de carburant pour un moteur à piston et procédé d'amortissement de variations de pression
EP4030049A1 (fr) Système d'injection de carburant à rampe commune pour un moteur à piston à combustion interne multicylindres, procédé de mise à niveau d'un système d'injection de carburant dans un moteur à piston à combustion interne multicylindres et moteur à piston à combustion interne
EP3099924B1 (fr) Système d'injection de carburant à rampe commune
EP2917554B1 (fr) Dispositif d'injection de carburant
US11280260B2 (en) Engine operating method and engine system for improved load step acceptance
EP2923072B1 (fr) Système d'injection de carburant
GB2564653A (en) Fuel injection equipment
CN205036487U (zh) 组合式燃料喷射设备及发动机
EP3262294B1 (fr) Système d'injection de carburant
JP2007327424A (ja) 内燃機関の燃料供給装置

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20161216