CN101360909A - 燃料喷射器 - Google Patents

燃料喷射器 Download PDF

Info

Publication number
CN101360909A
CN101360909A CNA2006800516254A CN200680051625A CN101360909A CN 101360909 A CN101360909 A CN 101360909A CN A2006800516254 A CNA2006800516254 A CN A2006800516254A CN 200680051625 A CN200680051625 A CN 200680051625A CN 101360909 A CN101360909 A CN 101360909A
Authority
CN
China
Prior art keywords
valve
fuel injector
feedback path
leakage oil
valve member
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
CNA2006800516254A
Other languages
English (en)
Other versions
CN101360909B (zh
Inventor
F·德雷辛
M·佩里施
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 CN101360909A publication Critical patent/CN101360909A/zh
Application granted granted Critical
Publication of CN101360909B publication Critical patent/CN101360909B/zh
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • 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
    • 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
    • F02M2200/304—Fuel-injection apparatus having mechanical parts, the movement of which is damped using hydraulic 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
    • F02M2547/00—Special features for fuel-injection valves actuated by fluid pressure
    • F02M2547/003—Valve inserts containing control chamber and valve piston

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

本发明涉及一种用于内燃机的燃料喷射器(1)，该燃料喷射器具有一在一喷嘴体(4)中可轴向上移动地被导向的喷嘴针(5)，该喷嘴针释放或关闭至少一个用于燃料喷射的喷射孔(9)，该燃料喷射器具有一在一保持体(14)中可轴向上移动地被导向的阀活塞(12)，该阀活塞控制所述喷嘴针(5)的打开运动及关闭运动，该燃料喷射器具有一阀件(16)，在该阀件中所述阀活塞(12)形成一与高压侧(2)连接的控制室(17)的边界，该控制室通过一控制阀(20)与低压侧(22)连接，该燃料喷射器具有一泄漏油－反馈通路(23；23’)，该泄漏油－反馈通路将泄漏油从所述保持体(14)的区域中导走，本发明提出：该泄漏油－反馈通路(23；23’)至少部分地在所述阀件(16)中延伸。

Description

燃料喷射器
技术领域
本发明涉及一种按权利要求1类型的燃料喷射器。
背景技术
柴油共轨系统包括燃料喷射器或者说其零部件在工作时遭受大的压力负荷。压力的大小大约相应于在发动机中要达到的喷射压力。这些喷射压力越高，发动机特性(功率/燃油消耗率/噪声/排放)越好。在过去及将来都致力于尽可能地提高该压力。不过，已有的构造在其几何结构设计中受到限制。
在已知的燃料喷射器中，泄漏通过一个泄漏油-反馈通路被从保持体中导走，该泄漏油-反馈通路延伸在该保持体中并且通入到该保持体的一个单独的低压侧的腔室中。
发明内容
按本发明的用于内燃机的具有权利要求1的特征部分特征的燃料喷射器有利于压力提高、成本降低及质量改善。通过本发明可取消在保持体上强度降低的制造方法。消除了泄漏油凹槽/泄漏油槽的切削区域中的由现有的构造引起的毛刺。由此取消了那里的去毛刺工序，及总地取消了多个工序。壁厚问题也得到了解决，使得可以使用例如更长及更耐用的阀夹紧螺钉(更多承载螺纹线)来夹紧保持体，这又允许压力提高。通过本发明可以实现具有更高工作压力的燃料喷射器，或者至少更接近这一目标。通过按本发明的设计简化了燃料喷射器的结构，减少了加工步骤的数目。此外，可以实现保持体的强度升高和燃料喷射器的压力提高。
本发明技术方案的其它优点及有利的构型可从说明、附图及权利要求中得知。
附图说明
本发明的两个实施例被表示在附图中及在下面将对其进行详细的描述。附图表示：
图1为按本发明的燃料喷射器的总图，
图2为图1的阀件区域的细节图，
图3为按本发明的燃料喷射器的第二个实施例的类似于图2的视图。
具体实施方式
图1所示的燃料喷射器1设置在燃料的被加载以高压的喷射通路2上，并伸入待供油的内燃机的燃烧室中。
一个具有锥形阀密封面6的活塞状的阀元件(喷嘴针)5可移动地支承在喷嘴体4的一个轴向上的导向孔3中，该阀密封面通过一闭合弹簧7被压靠在喷嘴体4的一锥形阀座面8上并且关闭设置在那里的一些喷射孔9。喷射通路2在喷嘴体4中通入一环形压力室10中，一延伸在导向孔3与喷嘴针5之间的环形间隙从该压力室一直延伸至阀座面8。喷嘴针5在压力室10的区域中具有一构造成压力肩的控制面11，通过喷射通路2输入的燃料为了喷嘴针5的打开而作用在该控制面上。
喷嘴针5的打开运动和关闭运动通过一阀活塞12来控制，该阀活塞在一保持体14的一导向孔13中可移动地被导向，并以其一端部在轴向上作用在喷嘴针5的远离阀密封面6的端面上。如图2所示，在另一端，阀活塞12借助一在阀件16中在关闭方向上起作用的控制面15形成一控制室17的边界，该控制室通过一个Z-节流阀18与喷射通路2连接。一A-节流阀19由控制室17通出，该A-节流阀可通过一个例如构造成二位二通的电磁阀的控制阀20(阀关闭元件21)与一低压侧的减压控制室(Absteuerraum)22连接。为了将泄漏油从保持体14的区域中导出，在阀件16中设置有一个轴向通孔形式的泄漏油-反馈通路23，该泄漏油-反馈通路从保持体14的承受低压的导向孔13中通出并且一直延伸到控制室22中。保持体14可以以更大的壁厚来制造，使得可以使用例如更长及更稳固的阀夹紧螺钉24(更多承载螺纹线)来夹紧阀件16，这又允许压力提高。
这样来设计控制面11、15及闭合弹簧7，使得在控制阀20关闭后，也就是说在压力室10与控制室17中的压力相等时，喷嘴针5关闭这些喷射孔9。Z-节流阀18比A-节流阀19小，从而通过控制阀20的打开，使得控制室17中的压力通过减压控制室22下降，并且压力室10中的压力现在足以使得喷嘴针5抵抗闭合弹簧7的作用而打开。
图3所示的构造与图2所示的构造的不同之处仅在于：在图3中，泄漏油-反馈通路23’不是直接通入减压控制室22中，而是在相同的液压工作原理的情况下，在侧面通入阀件16的一外表面25中并从该外表面处被向上引导至低压侧。

Claims (5)

1.用于内燃机的燃料喷射器(1)，具有：
一在一喷嘴体(4)中可轴向上移动地被导向的喷嘴针(5)，该喷嘴针释放或关闭至少一个用于燃料喷射的喷射孔(9)；
一在一保持体(14)中可轴向上移动地被导向的阀活塞(12)，该阀活塞控制所述喷嘴针(5)的打开运动及关闭运动；
一阀件(16)，在该阀件中所述阀活塞(12)形成一与一高压侧(2)连接的控制室(17)的边界，该控制室通过一控制阀(20)与一低压侧(22)连接；
一泄漏油-反馈通路(23；23’)，该泄漏油-反馈通路将泄漏油从所述保持体(14)的区域中导出，
其特征在于：该泄漏油-反馈通路(23；23’)至少部分地在所述阀件(16)中延伸。
2.根据权利要求1的燃料喷射器，其特征在于：所述泄漏油-反馈通路(23)通入所述控制阀(20)的一低压侧的减压控制室(22)中。
3.根据权利要求1或2的燃料喷射器，其特征在于：所述泄漏油-反馈通路(23)通过单一一个通孔构成。
4.根据以上权利要求中一项的燃料喷射器，其特征在于：所述泄漏油-反馈通路(23)仅在所述阀件(16)中延伸。
5.根据权利要求1或2的燃料喷射器，其特征在于：所述泄漏油-反馈通路(23’)在侧向上通入所述阀件(16)的一外表面(25)中并且从该外表面处被引导至所述低压侧。
CN2006800516254A 2006-01-23 2006-11-27 燃料喷射器 Expired - Fee Related CN101360909B (zh)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102006003040.0 2006-01-23
DE102006003040A DE102006003040A1 (de) 2006-01-23 2006-01-23 Kraftstoffinjektor
PCT/EP2006/068952 WO2007082598A1 (de) 2006-01-23 2006-11-27 Kraftstoffinjektor

Publications (2)

Publication Number Publication Date
CN101360909A true CN101360909A (zh) 2009-02-04
CN101360909B CN101360909B (zh) 2011-02-09

Family

ID=37890906

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2006800516254A Expired - Fee Related CN101360909B (zh) 2006-01-23 2006-11-27 燃料喷射器

Country Status (6)

Country Link
US (1) US20080283627A1 (zh)
EP (1) EP1979605B1 (zh)
CN (1) CN101360909B (zh)
AT (1) ATE434721T1 (zh)
DE (2) DE102006003040A1 (zh)
WO (1) WO2007082598A1 (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107035586A (zh) * 2017-01-18 2017-08-11 哈尔滨工程大学 一种带液力反馈的微动态回油谐振式电控喷油器

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009103080A (ja) * 2007-10-24 2009-05-14 Denso Corp 燃料噴射弁
DE102014200581A1 (de) * 2014-01-15 2015-07-16 Robert Bosch Gmbh Brennstoffeinspritzanlage mit einer Brennstoff führenden Komponente, einem Brennstoffeinspritzventil und einer Verbindungseinrichtung
CN108412653B (zh) * 2018-03-30 2023-11-03 重油高科电控燃油喷射系统(重庆)有限公司 一种共轨喷油器

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH495504A (de) * 1968-08-28 1970-08-31 Sopromi Soc Proc Modern Inject Brennstoff-Einspritzventil mit elektromagnetischer Betätigung
US6012644A (en) * 1997-04-15 2000-01-11 Sturman Industries, Inc. Fuel injector and method using two, two-way valve control valves
US5826802A (en) * 1995-11-17 1998-10-27 Caterpillar Inc. Damped check valve for fluid injector system
DE19641824A1 (de) * 1996-10-10 1998-04-16 Bosch Gmbh Robert Kraftstoffeinspritzventil für Brennkraftmaschinen
DE19947772A1 (de) * 1999-10-05 2001-04-19 Hermann Golle Einspritzventil, insb. für Common-Rail-Einspritzsysteme
DE10052604A1 (de) * 2000-10-24 2002-05-02 Bosch Gmbh Robert Magnetventil zur Steuerung eines Einspritzventils einer Brennkraftmaschine
ITTO20010814A1 (it) * 2001-08-14 2003-02-14 Fiat Ricerche Iniettore di combustibile per un motore endotermico e relativo metododi fabbricazione.
DE10312913A1 (de) * 2003-03-22 2004-10-07 Robert Bosch Gmbh Hubgesteuertes Kraftstoffeinspritzventil

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107035586A (zh) * 2017-01-18 2017-08-11 哈尔滨工程大学 一种带液力反馈的微动态回油谐振式电控喷油器
CN107035586B (zh) * 2017-01-18 2023-01-03 哈尔滨工程大学 一种带液力反馈的微动态回油谐振式电控喷油器

Also Published As

Publication number Publication date
US20080283627A1 (en) 2008-11-20
DE502006004092D1 (de) 2009-08-06
EP1979605A1 (de) 2008-10-15
WO2007082598A1 (de) 2007-07-26
CN101360909B (zh) 2011-02-09
DE102006003040A1 (de) 2007-07-26
EP1979605B1 (de) 2009-06-24
ATE434721T1 (de) 2009-07-15

Similar Documents

Publication Publication Date Title
US8662411B2 (en) Fuel injection valve for internal combustion engines
CN101578445B (zh) 用于将燃料喷射到内燃机燃烧室中的喷射器
CN101680413B (zh) 用于燃料喷射阀的控制阀
CN101548093B (zh) 用于内燃机的燃料喷射阀
US20110180634A1 (en) Nozzle body, nozzle assembly and fuel injector, and method for producing a nozzle body
CN101910605B (zh) 降低了操作中随时间的变化的发动机和控制阀组件
US20070200011A1 (en) Fuel injector having nozzle member with annular groove
CN101360909B (zh) 燃料喷射器
EP2634414B1 (en) Fuel-injection valve for an internal combustion engine
US6925988B2 (en) Fuel-injection system for internal combustion engines
US7415969B2 (en) Fuel injector having recessed check top
JP6329999B2 (ja) 燃料噴射ユニット及びシステム
US20090266340A1 (en) Fuel injector
CN101639022B (zh) 喷射阀
US9719476B2 (en) B-LCCR injector pilot valve orifice, armature and plunger guide arrangement
US6913212B2 (en) Oil activated fuel injector control with delay plunger
JP2008163772A (ja) 燃料制御弁
US20030019959A1 (en) Fuel injection device for internal combustion engines
KR20060134166A (ko) 커먼-레일-인젝터
US6557529B2 (en) Pressure-controlled injector with force-balancing capacity
KR101623679B1 (ko) 유압 구동 연료 분사 장치 및 내연 기관
US20230012407A1 (en) Injector apparatus
US6640782B2 (en) Fuel-injection apparatus for internal combustion engines
CN105102804A (zh) 用于内燃机的燃料喷射阀
KR20230169223A (ko) 연료 펌프

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20110209

Termination date: 20201127

CF01 Termination of patent right due to non-payment of annual fee