EP0692625B1 - Düsenkopf für eine Brennstoffeinspritzdüse - Google Patents

Düsenkopf für eine Brennstoffeinspritzdüse Download PDF

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Publication number
EP0692625B1
EP0692625B1 EP19940810420 EP94810420A EP0692625B1 EP 0692625 B1 EP0692625 B1 EP 0692625B1 EP 19940810420 EP19940810420 EP 19940810420 EP 94810420 A EP94810420 A EP 94810420A EP 0692625 B1 EP0692625 B1 EP 0692625B1
Authority
EP
European Patent Office
Prior art keywords
nozzle head
fuel
nozzle
interference member
accordance
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
EP19940810420
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0692625A1 (de
Inventor
Dr. Jakob Vollerweider
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 NSD Schweiz AG
Original Assignee
Wartsila NSD Schweiz AG
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 NSD Schweiz AG filed Critical Wartsila NSD Schweiz AG
Priority to DE59409040T priority Critical patent/DE59409040D1/de
Priority to EP19940810420 priority patent/EP0692625B1/de
Priority to DK94810420T priority patent/DK0692625T3/da
Priority to JP15648695A priority patent/JP3738053B2/ja
Priority to KR1019950019718A priority patent/KR100386183B1/ko
Priority to FI953430A priority patent/FI106740B/fi
Priority to CN95108417A priority patent/CN1066802C/zh
Publication of EP0692625A1 publication Critical patent/EP0692625A1/de
Application granted granted Critical
Publication of EP0692625B1 publication Critical patent/EP0692625B1/de
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
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
    • 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
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/162—Means to impart a whirling motion to fuel upstream or near discharging orifices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B3/00—Engines characterised by air compression and subsequent fuel addition
    • F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F7/00—Casings, e.g. crankcases or frames
    • F02F2007/0097—Casings, e.g. crankcases or frames for large diesel engines

Definitions

  • the invention relates to a nozzle head for a Fuel injector according to the preamble of Claim 1.
  • the invention further relates to a fuel injector and a Internal combustion engine with an inventive Nozzle head.
  • Fuel injectors are commonly found in Combination with injectors used to create a Fuel, possibly together with compressed air or other gases into which Combustion chamber of a reciprocating piston internal combustion engine to inject.
  • the resulting when injecting Fuel jet formation in the combustion chamber is usually determined by the geometric Properties of the fuel injector.
  • CH 645 699 A is a nozzle for one Fuel injector known within the Nozzle head fixed, swirl-generating surfaces has, so that a fuel jet swirled out emerges from the nozzle head and is therefore easily atomized.
  • An injection nozzle is known from FR 1028215 A, at a specially designed element in the fuel channel is provided that the incoming fuel inside of the nozzle head set in rotation. This rotation causes a turbulent outflow of fuel the nozzle openings.
  • Nozzle head for a fuel injector improve that jet pattern from the nozzle head escaping fuel an improved turbulent Has flow behavior.
  • the nozzle head according to the invention has one in its interior arranged, rotating interfering body on the basis of fuel flowing through the nozzle head in motion is displaced so that the flow against the nozzle holes is constantly changing what the degree of turbulence of the escaping fuel greatly increased.
  • the movement of the Interfering body modulates, among other things, the emerging Amount of fuel, the exit speed and the Flow direction as a function of time.
  • An embodiment of a disturbing body exists from a body that is rotatably arranged in the interior of the nozzle head.
  • a such disturbing body is caused by the flowing fuel set in rotation.
  • the disturbing body is like this designed that the flowing fuel the Sets disturbing bodies in motion, for example by the fact that the interfering body is designed as a helical spur gear is, the fuel flowing through the teeth causes a rotation of the interfering body.
  • An advantage of the invention is the fact that the Combustion process in the combustion chamber due to the turbulent fuel jet image with a reduced Emission of nitrogen oxides (NOx) expires.
  • the on the edge of the Fuel swirl trained swirls cause sometimes also flue gas is drawn into the combustion zone is what is referred to as "internal flue gas recirculation" becomes.
  • the inert flue gas lowers the partial pressure of oxygen and hence the temperature in the flame, which already increases even with low recirculation rates leads to a reduction in nitrogen oxide emissions.
  • nozzle head according to the invention can be seen in the fact that the interfering bodies are in Integrate nozzle heads of known embodiments leave so that a nozzle head according to the invention structurally identical to known ones Embodiments can be produced so that existing Nozzle heads problem-free through nozzle heads according to the invention are interchangeable.
  • Another advantage is that the Interfering body through the flowing fuel in motion be moved, so that no additional and complex Drive for moving the interfering body is necessary.
  • Fig. 1 shows a longitudinal section of a Fuel injector 20, such as in Large diesel engines are used.
  • the nozzle head 2 is connected to a nozzle body 1 and has one Cavity 9, an opening 5 or inlet 5 to supply fuel, and at least one Opening 6 for the delivery of fuel.
  • the cavity 9 is cylindrical and has an axis B on.
  • the nozzle hole 6 has an inlet opening 6a and an outlet opening 6b.
  • the pressurized Fuel is through a bore 4 of the opening 5th supplied, the inflow amount by a spring-loaded needle 3 is controllable.
  • the nozzle holes 6 depend on the position of the nozzles in the combustion chamber arranged. With a peripheral injection like this is common with 2-stroke engines, the nozzle holes bundled, pointing in one direction. At 4-stroke engines are usually powered by a central nozzle injected, which is why the nozzle holes 6 evenly over the circumference of the nozzle head 2 are arranged. Of the sake of clarity, the interfering bodies are shown in FIG. 1 not shown.
  • the 2 is in the cavity 9, the designed as a blind hole 11 with an axis of symmetry B.
  • a helical spur gear 12 the during the injection phase through the fuel flow is rotated so that the entry openings 6a of the nozzle holes 6 are covered periodically.
  • the Spur gear 12 is thus a rotating disturbing body 12 educated.
  • the spur gear 12 is cylindrical formed and has an axis of rotation A, which in present embodiment congruent to Axis of symmetry B is arranged.
  • the helical gear Spur gear 12 has recesses 12a, which over the entire width of the spur gear 12, and their Direction to the axis of rotation A is inclined such that the inflowing fuel is a rotating movement of the Spur gear 12 causes.
  • a ball 14 arranged as a bearing for the rotating disturbing body 12 serves to reduce the friction hold.
  • the gap width 15 between the nozzle head 2 and the rotating interference body 12 is preferably such dimensioned that low friction results.
  • the rotating interference body 12 covers the inlet opening 6a of the nozzle hole 6 periodically, so that, as in Fig. 2a, an emerging fuel jet 21 arises, the pulsating and turbulent in the combustion chamber propagating fronts 21a, 21b, 21c.
  • an emerging fuel jet 21 arises, the pulsating and turbulent in the combustion chamber propagating fronts 21a, 21b, 21c.
  • the Leakage of fuel is periodically severely disrupted, which results in multiple beam fronts 21a, 21b, 21c, so because of the prevailing turbulence Combustion products in the fuel jet be drawn in, which leads to the desired inhibition of Nitrogen oxide formation leads.
  • the nozzle hole 6 and its inner wall can in any shape, because the pulsating Behavior of the fuel flow at the Entry opening 6a is generated.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
EP19940810420 1994-07-15 1994-07-15 Düsenkopf für eine Brennstoffeinspritzdüse Expired - Lifetime EP0692625B1 (de)

Priority Applications (7)

Application Number Priority Date Filing Date Title
DE59409040T DE59409040D1 (de) 1994-07-15 1994-07-15 Düsenkopf für eine Brennstoffeinspritzdüse
EP19940810420 EP0692625B1 (de) 1994-07-15 1994-07-15 Düsenkopf für eine Brennstoffeinspritzdüse
DK94810420T DK0692625T3 (da) 1994-07-15 1994-07-15 Dysehoved til en brændstofindsprøjtningsdyse
JP15648695A JP3738053B2 (ja) 1994-07-15 1995-06-22 燃料噴射ノズル用ノズルヘッド
KR1019950019718A KR100386183B1 (ko) 1994-07-15 1995-07-06 연료분사노즐용노즐헤드및내연기관에의연료분사방법
FI953430A FI106740B (fi) 1994-07-15 1995-07-13 Suutinpää polttoaineen suihkutussuutinta varten
CN95108417A CN1066802C (zh) 1994-07-15 1995-07-14 喷油嘴的喷嘴头及其喷油嘴和内燃机

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19940810420 EP0692625B1 (de) 1994-07-15 1994-07-15 Düsenkopf für eine Brennstoffeinspritzdüse

Publications (2)

Publication Number Publication Date
EP0692625A1 EP0692625A1 (de) 1996-01-17
EP0692625B1 true EP0692625B1 (de) 1999-12-29

Family

ID=8218285

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19940810420 Expired - Lifetime EP0692625B1 (de) 1994-07-15 1994-07-15 Düsenkopf für eine Brennstoffeinspritzdüse

Country Status (7)

Country Link
EP (1) EP0692625B1 (fi)
JP (1) JP3738053B2 (fi)
KR (1) KR100386183B1 (fi)
CN (1) CN1066802C (fi)
DE (1) DE59409040D1 (fi)
DK (1) DK0692625T3 (fi)
FI (1) FI106740B (fi)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3810583B2 (ja) * 1999-05-13 2006-08-16 三菱電機株式会社 燃料噴射弁
DK1353061T3 (da) * 2002-04-11 2008-06-23 Waertsilae Nsd Schweiz Ag Dysehoved til brændstofindspröjtningsdyse
DE10350548A1 (de) * 2003-10-29 2005-06-02 Robert Bosch Gmbh Brennstoffeinspritzventil
FR2888618B1 (fr) 2005-07-13 2007-09-14 Renault Sas Buse d'injection de gazole
WO2010035311A1 (ja) * 2008-09-24 2010-04-01 トヨタ自動車株式会社 内燃機関の燃料噴射弁及びその製造方法
CN104265530B (zh) * 2014-07-31 2016-08-31 中国第一汽车股份有限公司无锡油泵油嘴研究所 电控内燃机喷射器控制阀
CN105275698B (zh) * 2015-11-13 2017-11-10 吉林大学 一种发动机用变频喷油嘴
CN105715440A (zh) * 2016-03-30 2016-06-29 无锡美羊动力科技有限公司 除油腻型柴油机喷油嘴
CN105715438A (zh) * 2016-03-30 2016-06-29 无锡美羊动力科技有限公司 内置三角转齿的高效柴油机喷油嘴
CN105715439A (zh) * 2016-03-30 2016-06-29 无锡美羊动力科技有限公司 内置双磨齿防堵塞型柴油机喷油嘴
CN106150820A (zh) * 2016-07-12 2016-11-23 江西汇尔油泵油嘴有限公司 扰动柴油的方法以及喷油嘴
US10151235B2 (en) 2017-03-07 2018-12-11 Caterpillar Inc. Ducted combustion system for an internal combustion engine
CN108533377A (zh) * 2018-04-16 2018-09-14 浙江创格科技有限公司 一种高冷却效率的喷嘴总成
DK180103B1 (en) * 2018-12-11 2020-05-04 MAN Energy Solutions Internal combustion engine

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1028215A (fr) * 1950-11-21 1953-05-20 Augustin Chantiers Et Ateliers Perfectionnements aux pulvérisateurs de combustible
CH340093A (de) * 1956-05-12 1959-07-31 Sulzer Ag Brennstoffeinspritzdüse und Verfahren zu deren Herstellung
US4796816A (en) * 1987-09-21 1989-01-10 Gregory Khinchuk Impinging-jet fuel injection nozzle
DE4200709A1 (de) * 1992-01-14 1993-07-15 Bosch Gmbh Robert Kraftstoffeinspritzduese fuer brennkraftmaschinen

Also Published As

Publication number Publication date
DE59409040D1 (de) 2000-02-03
FI953430A (fi) 1996-01-16
JP3738053B2 (ja) 2006-01-25
KR100386183B1 (ko) 2003-08-06
DK0692625T3 (da) 2000-04-17
EP0692625A1 (de) 1996-01-17
CN1066802C (zh) 2001-06-06
JPH0849634A (ja) 1996-02-20
CN1133394A (zh) 1996-10-16
FI106740B (fi) 2001-03-30
FI953430A0 (fi) 1995-07-13

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