CN1090287C - 装有一整体泵、一控制阀及一混合器的透平增压器的egr系统 - Google Patents

装有一整体泵、一控制阀及一混合器的透平增压器的egr系统 Download PDF

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CN1090287C
CN1090287C CN98803026A CN98803026A CN1090287C CN 1090287 C CN1090287 C CN 1090287C CN 98803026 A CN98803026 A CN 98803026A CN 98803026 A CN98803026 A CN 98803026A CN 1090287 C CN1090287 C CN 1090287C
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egr
exhaust gas
charge air
turbocharger
outlet
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CN1249800A (zh
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S·D·阿诺尔德
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Honeywell International Inc
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L9/00—Valve-gear or valve arrangements actuated non-mechanically
    • F01L9/10—Valve-gear or valve arrangements actuated non-mechanically by fluid means, e.g. hydraulic
    • 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
    • F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
    • F02B37/005—Exhaust driven pumps being combined with an exhaust driven auxiliary apparatus, e.g. a ventilator
    • 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
    • F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
    • F02B37/02—Gas passages between engine outlet and pump drive, e.g. reservoirs
    • F02B37/025—Multiple scrolls or multiple gas passages guiding the gas to the pump drive
    • 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
    • F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
    • F02B37/12—Control of the pumps
    • F02B37/24—Control of the pumps by using pumps or turbines with adjustable guide vanes
    • 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
    • F02M26/05—High pressure loops, i.e. wherein recirculated exhaust gas is taken out from the exhaust system upstream of the turbine and reintroduced into the intake system downstream of the compressor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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    • 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
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/17—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the intake system
    • F02M26/19—Means for improving the mixing of air and recirculated exhaust gases, e.g. venturis or multiple openings to the intake system
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    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
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    • 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
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
    • F02M26/23—Layout, e.g. schematics
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    • 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
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/34—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with compressors, turbines or the like in the recirculation passage
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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    • 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
    • F02M47/04—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure using fluid, other than fuel, for injection-valve actuation
    • F02M47/043—Fluid pressure acting on injection-valve in the period of non-injection to keep it closed
    • 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
    • F02M57/022—Injectors structurally combined with fuel-injection pumps characterised by the pump drive
    • F02M57/025—Injectors structurally combined with fuel-injection pumps characterised by the pump drive hydraulic, e.g. with pressure amplification
    • 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
    • F02M57/022—Injectors structurally combined with fuel-injection pumps characterised by the pump drive
    • F02M57/025—Injectors structurally combined with fuel-injection pumps characterised by the pump drive hydraulic, e.g. with pressure amplification
    • F02M57/026—Construction details of pressure amplifiers, e.g. fuel passages or check valves arranged in the intensifier piston or head, particular diameter relationships, stop members, arrangement of ports or conduits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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    • 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
    • F02M59/10—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 the piston-drive
    • F02M59/105—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 the piston-drive hydraulic drive
    • 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
    • F02M26/08—EGR systems specially adapted for supercharged engines for engines having two or more intake charge compressors or exhaust gas turbines, e.g. a turbocharger combined with an additional compressor
    • 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
    • F02M26/09—Constructional details, e.g. structural combinations of EGR systems and supercharger systems; Arrangement of the EGR and supercharger systems with respect to the engine
    • F02M26/10—Constructional details, e.g. structural combinations of EGR systems and supercharger systems; Arrangement of the EGR and supercharger systems with respect to the engine having means to increase the pressure difference between the exhaust and intake system, e.g. venturis, variable geometry turbines, check valves using pressure pulsations or throttles in the air intake or exhaust system
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    • 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
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/14—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the exhaust system
    • F02M26/16—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the exhaust system with EGR valves located at or near the connection to the exhaust system
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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  • Physics & Mathematics (AREA)
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  • Exhaust-Gas Circulating Devices (AREA)
  • Supercharger (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)

Abstract

一种内燃机的废气再循环系统包含一透平增压器，透平增压器具有一压气机转子，在转子盘的相反两侧有两组叶片，供充量空气和再循环废气压缩用。充量空气流和再循环废气流在透平增压器内被分隔，一进口和再循环废气的出口蜗壳与透平增压器的中央壳体制成一体。一混合器接收充量空气冷却器下游的充量空气并混合再循环废气，以便输入进气岐管。在发动机排气岐管和透平增压器EGR进口蜗壳的进口中间的可变阀控制再循环量。

Description

装有一整体泵、一控制阀及一混合器的透平增压器的EGR系统
相关申请的相互参照
本申请享有标题为“采用装有一整体泵、一控制阀及一混合器的透平增压器的废气再循环系统”于1997年3月3日申请的临时申请60/039,246的申请日。
发明背景
发明领域
本发明总的涉及改善排放的内燃机废气再循环(EGR)领域。更具体地说，本发明提供：一种透平增压器压缩机叶轮，叶轮转子叶片安装在与压缩机转子相反的一侧，作为EGR泵，有单独的扩压道和蜗壳，供EGR自该泵流量输出用，还有单独通至EGR的蜗旋进气道；一种计量被再循环的废气的控制阀和一种将再循环废气混入发动机充量空气中的混合器。
相关技术说明
EGR是降低内燃机中Nox排放的已知方法。为有效利用，EGR系统必须在一般为现代高效率柴油机两端在其至少部分运转范围内用正的压力梯度来克服负压力梯度。实现EGR的各种方法都包括；将部分废气自排气岐管泵吸到进气岐管。将废气引入普通透平增压器或发动机上现有增压器的压缩进口来完成泵吸，或者，用另一种方法，设置一单独的压气机来接收废气，并将其加压到一适当的压力，以便加入到在发动机冲量空气增压系统下游的冲量空气中，由于这些系统的存在，通常招致燃料消耗的某些恶化。
EGR还要求再循环废气与进入的新鲜空气冲量充分混合以避免性能下降，并减少混合损失以避免额外的燃料消耗恶化。此外，要求对再循环废气流量的可靠控制，以确保在变工况下供给发动机进气岐管的冲量空气混合物的正确比例。此外，EGR系统的部件和特点必须和有效配置在现代发动机隔舱内的有限容积的限制相适应。
美国专利No.406,796提出了一种利用透平增压器中的一整体泵系统来实现ERG的方法，它从压气机直接将废气加到充量空气蜗壳中。
因此，本发明的目的是要提供一种新颖的废气再循环系统，它既要能通过采用EGR流通及新颖的控制部件对进入发动机的充量空气中的再循环废气流量的混合进行可靠的控制，以确保在变工况下其混合物的正确比例，并确保各气缸间的废气百分比率化率减至最小，从而改善发动机性能与燃料经济性，还要使该采用了废气再循环的泵部件的高度一体化的EGR系统能与现有发动机系统部件、如透平增压器的机械和功率密切配合。
发明概述
上述目的是通过下列实施方案来实现的：
提供一种内燃机废气再循环(EGR)系统，包括有一整体EGR泵的一透平增压器，包括：
一个包含一废气进口和一透平出口的透平壳体；
一个由经该废气进口接收的废气驱动的并连于一可旋转轴上的透平；
一个支承一轴承组件的中央壳体，该轴承组件装有该可旋转轴，该中央壳体包括供连于透平壳体用的装置；
一个有一空气进口和一充量空气出口的压气机壳体；
一个连于该可旋转轴的压气机转子，该转子有一第一组叶片，经该压气机壳体进口接收空气，并将压缩空气排至该充量空气出口，其特征在于其改进包括：该转子有一第二组叶片，与第一组叶片对置，安装在该转子上，与其成一体，并自一EGR进口接收废气，经一扩压道将压缩废气排至一废气出口，该废气出口和充量空气出口由单独的流道构成；
在该转子周边处分隔这些流道以分隔排气和充量空气的流道的装置；
用以将废气出口连接到一混合器的装置；
用以将充量空气出口连接到该混合器的装置。
该EGR进口和废气出口被结合为一个被安装在该压气机壳体和透平壳体中间的铸件。
该铸件包含该压气机转子的一背板，还包括用以将该铸件安装到该中央壳体的装置和用以将该压气机壳体安装到该铸件的装置。
该压缩废气出口包括一个终止于出口道的蜗壳；
EGR进口是一个终止于一大致圆柱形通道的蜗壳。
该分隔装置包括一块自该压气机壳体延伸到该转子周边的隔板。
该混合器处于该透平增压器下游，并接收该废气和充量空气，所述混合器有一出口，本发明还包括：
一个处在排气岐管和EGR进口中间以控制被再循环至透平增压器内的第二组叶片的废气量的控制阀；
用以将该混合器出口连接到发动机进气岐管的装置。
还包括一个处在控制阀和通至透平增压器的EGR进口中间的EGR冷却器。
还包括一个处在透平增压器的充量空气出口和混合器中间的充量空气冷却器。
EGR进口和废气出口结合成一个安装在压气机壳体和透平壳体中间的铸件。
附图简述
根据详细的说明和附图，会更清楚地理解本发明的细节和特点，其中：
图1为发动机与采用本发明的组合和部件的EGR系统的简图；
图2是在本发明实施例中所采用的与透平增压器成一体的EGR泵的详细剖视图；
图3是包含在本发明所公开的实施例中的来自EGR泵的再循环废气和来自透平增压器压气机的新鲜充量空气的混合器的详细剖视图；
图4是本发明实施例中所采用的用以控制再循环废气的阀的详细剖视图；
图5是图4阀的操作与元件的简图；
图6是图3混合器第二实施例的详细剖视图。
发明详述
参照各附图，图1表示内燃机10，有一进气岐管12和一排气岐管14。设置透平增压器16来将充量空气增压，由压气机转子18接收输入空气，该转子在压力空气输入到进气岐管之前提供压力空气给充量空气冷却器20。该压气机转子由连于透平24的轴22驱动，透平接收来自发动机排气岐管的废气。
再循环的废气自排气岐管流出，经一控制阀26被转移到EGR冷却器28。来自EGR冷却器的气体被供给EGR泵的进口，对于附图中所示的实施例，该EGR泵为一压气机转子30，它安装于受透平驱动的透平增压器轴上。来自EGR泵的压力废气流至一混合器32，该混合器使再循环废气流与充量空气混合，形成大致均匀的输入进气岐管的流量流。
图2表示采用本发明的整体EGR压气机的透平增压器的细节。该透平被包含在一铸造的透平壳体34内，该透平壳体包含一径向废气进口36，在图示的实施例中，该进口通至一分叉的蜗壳38。流经透平的气体在透平出口40处排出。轴22由包含被隔离件44分隔的轴颈轴承42和带轴承48的止推轴套46的轴承系统支承，所有的轴承均被安装在一个包含一些润滑通道52的中央壳体50内。充量空气压气机被包含在一铸造的压气机壳体54内，该壳体设有压缩充量空气的一空气进口56，一扩压道58和一涡壳60。
EGR泵被装入透平增压器的现有转子组内，在压气机叶轮的背面增加转子叶片62。一涡旋进口64提供再循环废气，一单独的扩压道66将压缩废气输送到一蜗壳68。EGR泵进口，扩压道和蜗壳均被安装在一壳体70内，该壳体代替了透平增压器的传统的压气机背板，因而大体上只需要稍微增加转子组和透平增压器的长度。压气机中充量空气流和EGR泵中再循废气的分隔由隔板72保持，该隔板固定在压气机壳体和EGR泵外壳之间。该隔板以台阶密封或离心密封方式与转子周边接合。另一些实施例采用一种涡旋密封，以产生一压差，分隔透平增压器中的EGR流和充量空气流，避免诸如在透平增压器下游的充量空气冷却器的充量空气流部件被沾污，这在随后详细说明。EGR泵外壳利用一保持环74和装在压气机壳体内的螺栓76安装于压气机壳体。
来自EGR泵的压力废气和来自透平增压器压气机与充量空气冷却器的压力充量空气在图3中详细表示的混合器32内混合。来自该泵的废气经进口78通到围绕主新鲜空气流道沿圆周分布的蜗壳80而被输入到混合器，该主新鲜空气流道自充量空气冷却器进入直通的进口82。该蜗壳引导废气经槽84均匀地绕围新鲜空气流道周围，槽84有一直径较小的特别的上游唇86和一直径较大的下游唇88，使EGR产生一三维角度，有助于穿透到该中心流和涡流内，与该下游进一步混合。
将新鲜空气流道内壁90的形状制成能产生渐缩/渐扩喷咀效应，这种效应提高了新鲜空气充量的速度，降低该气流的静压，从而增强EGR进入新鲜空气充量的夹带作用。混合流经出口92排出。
图6表示混合器的第二实施例，它包含一渐扩喷咀区91，以进一步增强EGR新鲜空气冲量的混合，并改善气流内的速度匹配。
图1表示混合器为一个配置在进气岐管进口附近的单独部件。然而，在其它的实施例中混合器的配置有变化，在那些实施例中采用了EGR冷却器，该混合器配置充量空气冷却器出口附近或与其制成一体，或作为发动机进气岐管的铸造或机加工的一部分。在不采用EGR冷却器的一些应用场合，混合器配置在压气机壳体出口或充量空气冷却器进口附近，或合并为它们的一整体部分。
再循环废气经控制阀26供应EGR泵。图4和5描写该阀一个实施例的机械构形和操作。一平衡电动螺线管94以由一活塞或膜片97产生的反向力作用在一三通气动或液压阀96上，由经一单独的废气再循环阀98的流动产生的压差又作用在该三通气动或液压阀96上。该压差通过通道100和102被检测。该三通阀自管路104提供供应空气给EGR阀的作动器106，或通至作动器通气管108。当电动螺线管力由活塞力实际平衡时，不发生流到EGR阀作动器的流动或自该作动器的流动。当活塞力不足以平衡电动螺线管力时，该三向阀开启，对作动器供给空气，于是提高了自主废气流动管路110经EGR阀进入EGR流动管路112的EGR流量，从而提高了该阀两端的压差，恢复了两力的平衡。相反，当活塞力大于电动螺线管力时，该三向阀开启，自EGR阀作动器通向大气，于是减少EGR流量和阀两端的压差，再次恢复这两种力的平衡。如图4中所示，对于附图中所示的实施例，EGR阀作动器采用封闭在压力壳体118内的一膜片114和弹簧116，该壳体配置一轴120，用以控制阀座124上的菌形阀122，以计量EGR流量。该三通阀采用包含供应与通气管道的多通道体126，支承在轴130上的可移动孔口连接螺线管和活塞。一中心弹簧132平衡螺线管和压力活塞的反作用力。
现在已按专利法规的要求详细说明了本发明，熟悉本技术的人们会认辨对本文中所公开的具体实施例的种种修改和替代。这些修改和替代均处在被下列权利要求书所限定的本发明的范围和意图内。

Claims (9)

1.一种内燃机废气再循环(EGR)系统，包括有一整体EGR泵的一透平增压器，包括：
一个包含一废气进口(38)和一透平出口(40)的透平壳体(34)；
一个由经该废气进口(38)接收的废气驱动的并连于一可旋转轴(22)上的透平(24)；
一个支承一轴承组件(42、44、46、48)的中央壳体(50)，该轴承组件装有该可旋转轴，该中央壳体包括供连于透平壳体用的装置；
一个有一空气进口(56)和一充量空气出口(60)的压气机壳体(54)；
一个连于该可旋转轴的压气机转子(18)，该转子有一第一组叶片，经该压气机壳体进口接收空气，并将压缩空气排至该充量空气出口，该转子有一第二组叶片(62)，与第一组叶片对置，安装在该转子上，与其成一体，并自一EGR进口(64)接收废气，经一扩压道(66)将压缩废气排至一废气出口(68)，该压缩废气出口包括一个终止于出口道的蜗壳。该废气出口和充量空气出口由单独的流道构成，
在该转子周边处分隔这些流道以分隔排气和充量空气的流道的装置；
用以将废气出口连接到一混合器(32)的装置；
用以将充量空气出口连接到该混合器的装置。
2.按权利要求1所述的内燃机EGR系统，其特征在于该EGR进口和废气出口被结合为一个被安装在该压气机壳体和透平壳体中间的铸件(70)。
3.按权利要求2所述的内燃机EGR系统，其特征在于该铸件包含该压气机转子的一背板，还包括用以将该铸件安装到该中央壳体的装置和用以将该压气机壳体安装到该铸件的装置。
4.按权利要求1所述的内燃机EGR系统，其特征在于EGR进口是一个终止于一圆柱形通道的蜗壳。
5.按权利要求1所述的内燃机EGR系统，其特征在于该分隔装置包括一块自该压气机壳体延伸到该转子周边的隔板(72)。
6.一种按权利要求1所述的内燃机的EGR系统，其特征在于：
该混合器处于该透平增压器下游，并接收该废气和充量空气，所述混合器有一出口，本发明还包括：
一个处在排气岐管和EGR进口中间以控制被再循环至透平增压器内的第二组叶片的废气量的控制阀；
用以将该混合器出口连接到发动机进气岐管的装置。
7.按权利要求7所述的内燃机EGR系统，其特征在于还包括一个处在控制阀和通至透平增压器的EGR进口中间的EGR冷却器。
8.按权利要求7所述的内燃机EGR系统，其特征在于还包括一个处在透平增压器的充量空气出口和混合器中间的充量空气冷却器。
9.按权利要求6所述的内燃机EGR系统，其特征在于EGR进口和废气出口结合成一个安装在压气机壳体和透平壳体中间的铸件。
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AU6447598A (en) 1998-09-22
CN1249800A (zh) 2000-04-05
JP4054383B2 (ja) 2008-02-27
BR9807983A (pt) 2000-02-15
JP2002514285A (ja) 2002-05-14
EP0964993B1 (en) 2004-06-23
US5937650A (en) 1999-08-17
WO1998039563A1 (en) 1998-09-11
DE69824703D1 (de) 2004-07-29
DE69824703T2 (de) 2005-08-11
EP0964993A1 (en) 1999-12-22
CA2282274A1 (en) 1998-09-11

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