CN101105161B - 废气再循环阀 - Google Patents

废气再循环阀 Download PDF

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CN101105161B
CN101105161B CN2007101283116A CN200710128311A CN101105161B CN 101105161 B CN101105161 B CN 101105161B CN 2007101283116 A CN2007101283116 A CN 2007101283116A CN 200710128311 A CN200710128311 A CN 200710128311A CN 101105161 B CN101105161 B CN 101105161B
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valve
gas recirculation
exhaust gas
valve member
recirculation valve
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CN101105161A (zh
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B·克利普菲尔
C·蒂里
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Hanon Systems Corp
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/16—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members
    • F16K1/18—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps
    • F16K1/20—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps with axis of rotation arranged externally of valve member
    • F16K1/2028—Details of bearings for the axis of rotation
    • F16K1/2035—Details of bearings for the axis of rotation the axis of rotation having only one bearing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/44—Mechanical actuating means
    • F16K31/52—Mechanical actuating means with crank, eccentric, or cam
    • F16K31/524—Mechanical actuating means with crank, eccentric, or cam with a cam
    • 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
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/52—Systems for actuating EGR valves
    • F02M26/53—Systems for actuating EGR valves using electric actuators, e.g. solenoids
    • F02M26/54—Rotary actuators, e.g. step motors
    • 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
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/65—Constructional details of EGR valves
    • F02M26/70—Flap valves; Rotary valves; Sliding valves; Resilient valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/16—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members
    • F16K1/18—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps
    • F16K1/20—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps with axis of rotation arranged externally of valve member
    • F16K1/2007—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps with axis of rotation arranged externally of valve member specially adapted operating means therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/24—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with valve members that, on opening of the valve, are initially lifted from the seat and next are turned around an axis parallel to the seat
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/44—Mechanical actuating means
    • F16K31/52—Mechanical actuating means with crank, eccentric, or cam
    • F16K31/528—Mechanical actuating means with crank, eccentric, or cam with pin and slot
    • F16K31/5282—Mechanical actuating means with crank, eccentric, or cam with pin and slot comprising a pivoted disc or flap
    • 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
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/02—EGR systems specially adapted for supercharged engines
    • F02M26/04—EGR systems specially adapted for supercharged engines with a single turbocharger
    • F02M26/06—Low pressure loops, i.e. wherein recirculated exhaust gas is taken out from the exhaust downstream of the turbocharger turbine and reintroduced into the intake system upstream of the compressor

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Exhaust-Gas Circulating Devices (AREA)
  • Mechanically-Actuated Valves (AREA)
  • Lift Valve (AREA)

Abstract

一种废气再循环(EGR)阀(10)，包括旋转驱动(12)，所述旋转驱动具有带凸轮轮廓(16)的凸轮构件(14)，所述旋转驱动允许可以绕旋转轴(18)旋转的阀构件(20)的操作，所述凸轮构件(14)的旋转导致所述旋转轴(18)的旋转，其特征在于，在关闭运动期间，所述EGR阀可以在接近关闭运动结束时在基本上与通过阀座(22)的流的方向平行的方向上向着所述阀座(22)移动。

Description

废气再循环阀
技术领域
本发明涉及根据权利要求1前序部分所述的废气再循环(EGR)阀。
在汽车工程领域中特别地结合对内燃机表现出的排放值改进以及结合燃油消耗减小，已知应当设置废气再循环系统来供应新鲜空气到内燃机。
背景技术
对于EGR阀，已知各种类型的操作来打开和关闭该阀。就阀构件的运动而言，即将阀构件从其阀座释放或者关闭阀的相反运动，已知的原理在于通过平移运动将阀构件(例如阀盘)从其阀座释放。在这方面，从EP 0856657B1已知应当设置凸轮，其通过驱动机构以旋转方式驱动并且与可平移运动的阀门挺杆接合，从而例如只要凸轮以旋转方式移动就平移地移动阀门挺杆，和例如当阀门打开时将阀门挺杆从其阀座上升起。
从EP 1245820A1已知另一种EGR阀。在此情况下，作为适当传动机构的结果，旋转运动被传送到阀构件(例如向下折叠的阀盘)，其在打开和关闭位置之间旋转运动，或者反之亦然。
DE 2703687A1涉及用于控制废气再循环系统的装置，其中翻板布置在进气歧管内并且突出到进气歧管中的EGR管线关闭在关闭位置。
从EP 1526272A1很清楚的知道根据权利要求1前序部分设计的EGR阀，其中阀构件以如下方式在轨道中移动，即当关闭运动接近结束时，阀构件切向地向着阀座移动至特定程度，即以相对于通过此阀座的流的方向基本垂直的方式。
发明内容
本发明基于设计当用于低压EGR系统中时提供增强性能的废气再循环阀的目的。
上述目的通过根据权利要求1的废气再循环阀实现。
据此，此阀包括旋转驱动，所述旋转驱动具有带凸轮轮廓的凸轮构件，所述旋转驱动允许可以绕旋转轴旋转的阀构件的操作。对于此类驱动，将EP 1526272A1的整个公开作为此特定公开的主题。此新的EGR阀的特征在于，在关闭运动期间，所述EGR阀在关闭运动接近结束时可以在基本上与通过阀座的流的方向平行的方向上向着所述阀座移动。换言之，在关闭运动接近结束时阀构件不会沿切向向着阀座移动，即阀构件不会沿着基本上垂直于流方向的方式移动，而是以向着阀座基本垂直的方式以翻板方式移动向阀座，换言之基本上与通过阀座的流方向平行。翻板也可以被称为“喇叭形阀”。上述设计允许对阀构件自身及其轨迹有特别简单的设计，并且同时可以确保废气再循环管线的可靠关闭。特别地，根据本发明的EGR阀适合于所谓的低压废气再循环系统，其中产生低压差。凸轮构件的旋转使得旋转轴旋转。换言之，旋转轴“物理上”存在为销、轴等，其以适当方式被支撑。旋转轴优选地为与阀构件和/或轴的支撑组件分开的构件。阀构件可以通过适当的突出部附装到旋转轴，突出部也可以由单独的构件形成。
根据本发明的EGR阀的优选实施例在其他权利要求中描述。
阀构件可绕其旋转的旋转轴有利地被设计为连续的。这允许旋转轴以特别简单的方式被设计。毫无疑问阀构件此外可以在一侧上被支撑。
目前，对于阀构件到旋转轴的安装，类似地确保特别简单结构设计的至少一个突出部是优选的。
即使阀构件可以设置在管状部分(其端部形成阀座)外部，当前优选的将阀座设置为管状部分内的孔。阀构件可以与其接触的阀座形成在管状部分内部。
在这点上，进一步优选的是将阀构件设置在管状部分内部。只要阀构件打开此阀构件就可以特别地布置在管状部分的边缘处适当的凹入内，以尽可能小程度地影响通过管状部分的流。上述管状部分例如可以为EGR管线。同样地，根据本发明的阀也可以是进气通道的一部分，换言之为其中再循环废气和新鲜空气混合的内燃机进气通路的一部分。
有利地，阀构件可以额外地具有至少一个孔，该孔在打开运动期间可以在阀构件从阀座分离之前被打开。此原因在于根据本发明的EGR阀优选地用于低压EGR系统，其中打开过程可能要克服反压来进行，即使当此过程“利用流”来发生并因此得到辅助。类似地可想到阀构件将“逆着”流被打开。在此情况下，阻碍阀打开过程的压差同样可以被减小，因为阀构件内的孔首先被打开并且打开运动之后发生。
此外，已经证明对于阀构件有利的是以弹性和挠性方式相对于突出部被附装。特别地对于那些其中阀构件具有孔的实施例，上述设计提供了与孔的释放相关的优点，无论阀构件的打开运动如何。
总之，优选的是设置阀构件中的孔的关闭构件，该关闭构件与阀构件安装到的突出部分开。
附图说明
现在将基于附图中描述的实施例来更详细地解释本发明。
图1描述了第一实施例中的废气再循环阀的分解透视图；
图2描述了图1中废气再循环阀处于其关闭状态时的分解透视图；
图3描述了第二实施例中的废气再循环阀的透视图；和
图4描述了第三实施例中的废气再循环阀的示意图。
具体实施方式
如图1所示，根据本发明的废气再循环(EGR)阀10具有旋转驱动12，该旋转驱动12具有凸轮构件14，凸轮构件14设置有凸轮轮廓16。在此特定实施例中，凸轮构件14在其外圆周上具有齿，通过该齿凸轮构件14被驱动52(例如电动机)以旋转方式驱动。凸轮构件14的轴被标示为“32”。如EP 1526272A1(先前已经参考过该文献)中所述，辊子34与凸轮轮廓接合，该辊子支撑在杠杆50上，杠杆50安装在阀构件20的旋转轴18上。如从图1可见，凸轮轮廓就其在圆周方向上的进展而言从接近旋转轴32的点延伸到接近凸轮构件14外侧齿状圆周的点。结果，凸轮构件14的旋转使得杠杆50旋转，并且由此使得旋转轴18以及阀构件20旋转。在此处所述的实施例中，阀构件20通过突出部固定到旋转轴18，这从图2中更容易看见。优选设计为基本圆形的阀构件20优选地在其中心被附装。如图1所示，阀构件20通过其附装到旋转轴18的突出部24(比较图2)可以包围旋转轴18(图1中的区域50)。
在图1所示阀构件20的打开位置，阀构件适当地容纳在管状部分26的凹入36内，使得其不会一直影响通过管状部分26的流。阀座22可以视为在管状部分26内并可以采取锥形。
在如图1所示的关闭运动期间，阀构件20实际上向着阀座22移动经过九十度弧离开所示的“水平”打开位置。在关闭运动开始时，阀构件20相应地基本上垂直于通过阀座22的流方向移动；根据图1的描述，此流方向从右上向左移动或者反之亦然。接近关闭运动结束，阀构件20基本上平行于此流的方向移动。但是，毫无疑问阀构件作为整体可以执行枢转运动，使得上述“直线”方向可应用于在所关注的特定点处的枢转运动的切向。
这在图2中更是清楚，该图2描述了图1所述EGR阀10的关闭状态。首先，图2与图1的比较显示凸轮构件14已经顺时针旋转，使得杠杆50也在此方向上旋转，并且阀构件已经呈现关闭位置。阀构件20通过其固定到旋转轴18的突出部在图2中标示为“24”。如图1和图2所示，管状部分26优选地具有尽可能圆的横截面。
图3是描述根据本发明的废气再循环阀的第二实施例的透视图；图3所示的细节也可以应用于图1和2表示的实施例。图3的方案区别于图1和2的实施例主要是由于这样的事实，即阀构件20至突出部24的附装(在此特定示例中)设计为可通过球形罩(未示出)和弹簧(未示出)移动。阀构件通过具有头部42并且可滑动地支撑在突出部24内的螺纹件固定到突出部24。阀构件20可以通过球形罩相对于突出部24倾斜至特定程度。为了避免由流A1方向上的废气压力造成的打开，弹簧通过螺纹件被适当地调节。在此处示出的实施例中，阀构件20包括孔28，该孔28可由单独的关闭构件30关闭。此关闭构件30具有球形端部。用于在打开运动期间带动突出部24的第一驱动挂钩44和用于在关闭运动期间带动突出部24的第二驱动挂钩46额外地设置在关闭构件30上。驱动(未示出)通过关闭构件30起作用。特别地，此关闭构件30被驱动，并且支撑在关闭构件30上的突出部24被驱动挂钩44和46在各自方向上“带动”，由此操作阀构件20。此外，为突出部24设置保持弹簧38。
“A1”表示通过阀座22的流方向。如果EGR阀10是用在低压废气再循环系统中的EGR阀，则阻挡阀构件20打开运动的压力在相反侧(即根据图3的右手侧)上占据上风，尽管气流在A1方向上。此压力可减小，因为在打开运动期间首先通过将关闭构件30向右移动来打开孔28，因此阀构件20的压差被平衡，并且此阀构件然后可以通过最小的力打开。此外，可以通过分隔件20内单独的孔28调节小的EGR流。作为流A1方向的替代，流可以在相反的方向A2上通过阀。类似地，通过关闭构件30实现了对小质量流率的有用调节质量。此外，可引起压力的降低，因此允许使得“更弱”的驱动来进行逆着流方向的打开操作。当阀关闭时，流A2的方向是有利的，因为其接触力具有支持效果以将任何泄漏保持为绝对最小化。
最后，图4描述了另一个实施例的EGR阀。在此实施例中，同样阀构件20具有孔28；在此情况下，该孔大致在阀构件20的中心。在此实施例中，阀构件20通过具有头部42的销40附装到突出部24，用于孔28的关闭构件30设置在销40上，此关闭构件基本为帽形或者U形。为此，关闭构件30具有沿着关闭构件的圆周的至少一个孔48。当关闭构件30从图4所示的位置开始被向右移动时，这使得阀构件20的两侧经由关闭构件30内的孔48并经由阀构件20内的孔28连通，结果以与对图3中实施例描述的相同方式，可以减小压差并且同时对于低质量流率可以获得有用的调节质量。

Claims (8)

1.一种废气再循环阀(10)，包括旋转驱动器(12)，所述旋转驱动器具有带凸轮轮廓(16)的凸轮构件(14)，所述旋转驱动器允许绕旋转轴(18)旋转的阀构件(20)的操作，所述凸轮构件(14)的旋转导致所述旋转轴(18)的旋转，其特征在于：
在关闭运动期间，所述阀构件(20)在接近关闭运动结束时在基本上与通过阀座(22)的流(A1)的方向平行的方向(A)上向着所述阀座(22)移动。
2.根据权利要求1所述的废气再循环阀，其特征在于：
所述旋转轴(18)在设计上为连续的。
3.根据权利要求1或2所述的废气再循环阀，其特征在于：
所述阀构件(20)通过至少一个突出部(24)固定到所述旋转轴(18)上。
4.根据权利要求1或2所述的废气再循环阀，其特征在于：
所述阀座(22)设置为管状部分(26)中的孔。
5.根据权利要求4所述的废气再循环阀，其特征在于：
所述阀构件(20)设置在所述管状部分(26)中。
6.根据权利要求3所述的废气再循环阀，其特征在于：
所述阀构件(20)包括至少一个孔(28)，该至少一个孔在打开运动期间在所述阀构件(20)从所述阀座(22)分离之前被打开。
7.根据权利要求3所述的废气再循环阀，其特征在于：
所述阀构件(20)相对于所述突出部(24)以弹性和挠性方式固定。
8.根据权利要求6所述的废气再循环阀，其特征在于：
所述废气再循环阀包括用于所述阀构件(20)内的所述孔(28)的关闭构件(30)，所述关闭构件从所述突出部(24)分离。
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PT1876348E (pt) 2009-11-04
CN101105161A (zh) 2008-01-16
ES2333246T3 (es) 2010-02-18
US7533659B2 (en) 2009-05-19
ATE443806T1 (de) 2009-10-15
EP1876348A1 (de) 2008-01-09
DE502006004917D1 (de) 2009-11-05

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