CN101115919B - 用于狄塞尔发动机的排气节流废气再循环阀模块 - Google Patents

用于狄塞尔发动机的排气节流废气再循环阀模块 Download PDF

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CN101115919B
CN101115919B CN2006800040958A CN200680004095A CN101115919B CN 101115919 B CN101115919 B CN 101115919B CN 2006800040958 A CN2006800040958 A CN 2006800040958A CN 200680004095 A CN200680004095 A CN 200680004095A CN 101115919 B CN101115919 B CN 101115919B
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V·约尔格尔
T·基纳
O·韦伯
B·索普
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D21/00—Controlling engines characterised by their being supplied with non-airborne oxygen or other non-fuel gas
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    • F02D21/08—Controlling engines characterised by their being supplied with non-airborne oxygen or other non-fuel gas peculiar to engines having other non-fuel gas added to combustion air the other gas being the exhaust gas of engine
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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
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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
    • F02M26/02—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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    • 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
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    • 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
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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
    • F02M26/52—Systems for actuating EGR valves
    • F02M26/53—Systems for actuating EGR valves using electric actuators, e.g. solenoids
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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
    • F02M26/52—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
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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
    • F02M26/65—Constructional details of EGR valves
    • F02M26/71—Multi-way valves
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    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B29/00—Engines characterised by provision for charging or scavenging not provided for in groups F02B25/00, F02B27/00 or F02B33/00 - F02B39/00; Details thereof
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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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    • 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
    • F02M26/35—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with means for cleaning or treating the recirculated gases, e.g. catalysts, condensate traps, particle filters or heaters
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/86493—Multi-way valve unit
    • Y10T137/86847—Pivoted valve unit
    • Y10T137/86855—Gate
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    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
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Abstract

一种废气模块包括壳体、壳体的至少一个入口、壳体内的多个出口以及壳体内部的阀，其中废气在导向第一出口时经过EGR通道。单个的致动器用于控制阀。主要的阀相对于EGR通道引导废气流，并且当EGR通道基本开启时，驱动器为了增加经过EGR通道的废气流量而变更阀的位置用以关闭排气通道以便增加入口和壳体内的背压。

Description

用于狄塞尔发动机的排气节流废气再循环阀模块
相关申请的交叉引用
本申请要求2005年7月6日提交的美国临时申请号60/696854和2005年2月7日提交的美国临时申请号60/650752的权益。
发明领域
本发明涉及一种将废气导向多个出口的废气模块，该废气模块包括至少一个废气再循环阀。
发明背景
由于联邦法令和州法令，现今的机动车辆在其运行期间可以释放的排放量受到限制。一种降低车辆所释放的排放量的方式是在车辆的排气系统中包括废气再循环(EGR)阀。EGR阀改变来自发动机排气歧管的废气的至少一部分的方向，使得废气随同新鲜空气一起再循环进入发动机的入口歧管。为了控制经过EGR阀的废气量，EGR阀由致动器控制。此外，在车辆的废气系统内放置废气节流阀，该废气节流阀进一步控制经过EGR通道或经过排气管以便离开发动机组件的废气量。因此，虽然EGR阀和废气节流阀都控制返回到发动机入口侧的废气量，但却是分开的部件并且分开控制。
因此，开发一种既包括EGR阀又包括废气节流阀的模块是令人期待的，在该模块内EGR阀和废气节流阀都可以由单个的致动器控制。由于可以使用单个的致动器用以控制EGR阀和废气节流阀，制造工艺由于零件数目的减少而变得更加高效。此外，在连接可能变得松散以及引起泄漏和压力降低的排气系统内，车辆的排气系统由于在排气系统内具有较少的连接和较少的零件而变得更加高效。
发明概述
本发明涉及一种废气模块，废气模块包括壳体、壳体内的至少一个入口、壳体内的多个出口、壳体内部的废气节流阀、壳体内部的废气再循环(EGR)阀，其中，废气在引向第一出口时经过EGR阀。单个的致动器用于控制EGR阀和废气节流阀。因此，EGR阀多数时间内由致动器控制，以及当EGR阀完全开启时，EGR阀为了提高经过EGR阀的废气流量，可以改变废气节流阀的位置以便增加入口和壳体内的背压。
此外，一种用于控制废气再循环量的方法包括步骤：致动器从控制系统接收信号，以及致动器相应地改变EGR阀的位置。在用于控制废气再循环量的方法内，也包括上文所描述的全部部件，以及为了控制经过第一出口的废气量而主要地控制EGR阀。
通过下文中提供的详细说明，将会清楚本发明进一步的应用领域。应当理解的是，详细说明和具体示例在简述本发明的优选实施例的同时，仅为试图说明的目的而不是试图限定本发明的范围。
附图简述
通过详细说明并结合附图，将会更加完全地理解本发明。
图1是排气节流-废气再循环模块的透视图；
图2是本发明优选实施例中阀和多个出口的截面透视图；
图3是本发明备选实施例中阀和多个出口的截面侧视图；
图4是废气再循环系统的示意图；和
图5是使用单个的致动阀用于控制经过多个出口的废气流量的方法的框图。
优选实施例的详细说明
下文中优选实施例的说明，本质上仅仅是示范性的而决不是试图限制本发明、本发明的应用或使用。
参照图1至图3，排气节流-废气再循环阀模块(ETVM)总体上由10示出。ETVM10具有带有入口14和至少一个出口16的壳体12。在优选实施例中，壳体12具有两个出口16。第一出口16a为废气再循环(EGR)通道，而第二出口16b为排气通道。壳体12还包含阀18，通过相对于EGR通道16a和排气通道16b放置在不同位置，阀18用于引导壳体12内部的废气流动。
单个的致动器20用于控制阀18。在优选实施例中，致动器20可操作地与电动马达22连接，使得致动器20相对EGR通道16a和排气通道16b将阀18的位置变更到所希望的位置。用以控制EGR通道16a和排气通道16b的单个的致动器20的使用，由于降低了操作ETVM10所需要的零件数目而变得有益。例如，如果EGR通道16a和排气通道16b具有分开的致动器，为了运行EVTM10而将会有额外的致动器以及运行致动器的额外电源。因此，通过使用单个的致动器20，制造工艺由于较少的零件需要生产和组装而变得更加高效。
在优选实施例中，ETVM10的流量主要地由相对于EGR通道16a放置的阀18控制。因此，当废气经过入口14流进壳体12时，阀18在通过致动器20控制的同时，引导废气经过EGR通道16a和排气通道16b中的一个或两个。当阀18定位成使得EGR通道完全地开启时，大量的空气流由于在壳体12和入口14内由废气产生的背压而经过EGR通道16a。然而，为了进一步提高经过EGR通道16a的流量，致动器20通过改变阀18的位置用以完全关闭排气通道16b而关闭排气通道16b，这增加了壳体12和入口14内的背压。这种背压的增加导致了更大量的废气流经EGR通道16a。此外，为了获得所希望的流经EGR通道16a和排气通道16b的废气量，将阀18放置在阀18完全地遮盖、部分地遮盖、或未遮盖EGR通道16a和排气通道16b的任何位置，或者其中的任何组合。
此外，为了提高壳体12和入口14内的废气背压，阀18定位成以便完全地关闭EGR通道16a以及部分地或者完全地关闭排气通道16b。提高壳体12和入口14内的废气压力，当关闭发动机时而变得有益或者有益于提高系统内废气的温度。如上文所述，单个的致动器20用于控制阀18以便相对于EGR通道16a和排气通道16b对阀18定位。以这种方式提高废气的背压由于背压的增加在发动机关闭时起作用而变得有益。因此，废气背压的增加增加了引起发动机关闭的发动机载荷。此外，废气温度的提高，由于提高的温度作为催化剂用以在低驱动循环期间开始废气的氧化而变得有益。
在优选实施例中，阀18是相对于EGR通道16a和排气通道16b成角度的圆盘。因此，阀18可操作地与致动器20连接并且为了如所希望的那样阻塞和露出EGR通道16a和排气通道16b而绕着壳体12的纵向轴线转动。阀18具有半圆外形使得能够放置阀18以便完全地阻塞EGR通道16a和排气通道16b、完全地开启EGR通道16a和排气通道16b、部分地开启EGR通道16a和排气通道16b、或者以上位置的任何组合。此外，阀18是成角度的以便更加有效地将废气流导向所希望的位置。因此，阀18的角度设计成用以降低阀18对废气施加的阻力量。
参照图3，在备选实施例中，阀18为了如所希望的那样关闭EGR通道16a和排气通道16b而绕着截面的轴线转动。与上文所介绍的圆盘实施例相似，阀18成瓣阀形使得能够放置阀18以便完全地阻塞EGR通道16a和排气通道16b、完全地开启EGR通道16a和排气通道16b、部分地开启EGR通道16a和排气通道16b、或者以上位置的任何组合。此外，阀18为了降低其对废气施加的阻力量而设计成具有角度。
参照图1至图4，包括ETVM10的发动机组件总体上由24示出。发动机26具有排气歧管28，排气歧管28释放来自发动机的废气，使得废气经过排气歧管进入涡轮机30。废气转动涡轮机30。在优选实施例中，废气然后经过狄塞尔机(diesel)颗粒过滤器(DPF)32并进入ETVM10中。壳体12的入口14为了减小发动机组件24所占据的空间而直接与DPF32的出口端连接。此外，通过具有在ETVM10和DPF32之间的直接连接，由于连接点的减少而很少出现废气泄漏，并且这导致了对废气压力降低的预防，以及由于零件的减少而导致较为简单的组装。在备选实施例中，DPF32的入口端直接与EGR通道16a和排气通道16b连接，这由于如上文所述的相同原因而变得有益。
无论DPF32相对于ETVM10位于何处，将通过入口14进入ETVM10的废气导向经过如上文所述的EGR通道16a和排气通道16b中的一个、两个或两者都不。经过排气通道16b的废气然后流经排气管34并且从发动机组件24中排出。经过EGR通道16a所引导的废气然后经过EGR通道36进入EGR冷却器38中。在废气已经过EGR冷却器38之后，废气同通过入口40的新鲜空气混合。废气和新鲜空气的混合物然后进入增加空气压力的压缩机42。压缩机32可操作地与涡轮机30连接，使得转动涡轮机30的废气引起压缩机42转动以便增加废气和新鲜空气的混合物的压力。一旦空气已被压缩并离开压缩机42，空气经过增压空气冷却器44以便进一步降低空气温度。然后空气流进发动机26的入口歧管46中。在备选实施例中，将ETVM10放置在发动机组件24中的任何地方，在发动机组件24内具有EGR阀以及由单个的致动器20控制的用于变更废气流动的控制机构而变得有益。
参照图5，用于控制废气再循环量的方法包括在判定框48内的第一步骤：致动器20接收来自控制系统的信号。在优选实施例中，控制系统为发动机控制单元(ECU)(未示出)，而ECU经编程用以确定所希望的阀18的位置和/或经过ETVM10的空气流。在备选实施例中，控制单元为致动器20，致动器20与上文所述的ECU起相似作用，因为致动器20确定阀18所希望的位置和/或经过ETVM10的空气流以及相应地调节阀。在上文所述的两个实施例的任一个之中，ECU或者致动器20典型地从位置传感器(未示出)中接收信号用以确定阀18的当前位置。然而，在备选实施例中，将质量空气流量传感器用于确定经过ETVM10的空气流，然后ECU或者致动器20确定所希望的空气流并因而相应地放置阀18。因此，只要对ETVM10的调整是用于确定从ETVM10获得所希望的输出，则可使用任何类型的传感器。
在驱动器20已接收控制信号后，在判定框50内驱动器20相应地变更阀18的位置。因此，取决于将从发动机组件24直接释放的废气量，致动器20对阀18定位用以引导废气经过EGR通道16a和排气通道16b。紧接着，在判定框52内，必须确定阀18是否定位成使得EGR通道16a基本开启。如果确定EGR通道16a基本开启，则在判定框54内致动器20控制阀18以便通过关闭排气通道16b进一步提高流经EGR通道16a的废气量。然而，如果确定EGR通道16a未基本开启，则在判定框56内致动器20继续控制阀18以便控制流经EGR通道16a和排气通道16b的废气量。在判定框54和判定框56之后，用于控制废气再循环量的方法返回到判定框48使得致动器20接收信号以便进一步控制阀18。
在优选实施例中，因为如果EGR通道16a未基本开启则不希望增加废气背压以便增加经过EGR通道16a的废气流量，所以在相对于排气通道16b变更阀18之前确定EGR通道16a是否基本开启。因此，如果EGR通道16a未基本开启，则将阀18放置成开启EGR通道16a用以增加经过EGR通道16a的废气流量而不是增加背压。在优选实施例中，阀18放置成使得EGR通道16a在相对于排气通道16b放置阀18之前完全地开启，用以变更经过EGR通道16a的废气流量。然而，在阀18完全地开启EGR通道16a之前控制经过EGR通道16a的流量在本发明的范围内。
本发明的说明本质上仅仅是示范性的，因而未脱离本发明要旨的改动意味着落入本发明范围内。这样的改动并不认为脱离了本发明的精神和范围。

Claims (7)

1.一种废气模块，包括：
供燃烧发动机的组件使用的阀组件，所述阀组件包括壳体，所述壳体具有在所述壳体内的多个开口，所述开口包括至少第一入口、第一出口和第二出口；
在所述壳体内的阀；和
致动器，所述致动器可操作地与所述阀连接并且构造和设置成用以相对于所述开口移动所述阀，以便控制由其通过的气体流量，并且其中所述阀可移动到分别完全关闭各个入口和出口，以便增加背压和促进关闭燃烧发动机，其中所述阀是半圆形盘，所述半圆形盘构造和设置成可移动到至少第一位置和第二位置，使得在所述第一位置，所述第一出口和第二出口的至少一个完全打开，而在所述第二位置，所述第一出口和第二出口的至少一个至少部分关闭。
2.根据权利要求1所述的废气模块，其特征在于，进一步包括用于所述燃烧发动机的排气侧，并且其中所述壳体内的至少第一入口与所述排气侧流体连通。
3.根据权利要求1所述的废气模块，其特征在于，所述阀替换为两个平面的瓣阀，以便所述阀可相对于所述壳体内的开口设置成使得所述开口是完全打开的、至少部分关闭的或者它们的组合中的至少一个。
4.根据权利要求1所述的废气模块，其特征在于，所述阀构造和设置成用以移动到至少第一位置、第二位置和第三位置，使得在所述第一位置，所述第二出口完全打开而所述第一出口至少部分关闭，并且使得在所述第二位置，所述第二出口完全打开且所述第一出口完全打开，并且使得在所述第三位置，所述第二出口至少部分关闭而所述第一出口完全打开。
5.根据权利要求1所述的废气模块，其特征在于，所述阀构造和设置成用以移动到至少第一位置和第二位置，使得在所述第一位置，所述第一出口和第二出口各自完全打开，并且使得在所述第二位置，所述第一出口完全打开而所述第二出口至少部分关闭。
6.根据权利要求1所述的废气模块，其特征在于，所述阀构造和设置成用以移动到其中所述第一出口和第二出口均完全打开的第一位置、其中所述第一出口和第二出口均各自至少部分关闭的第二位置和其中所述第一出口和第二出口中的一个完全打开而所述第一出口和第二出口中的另一个至少部分关闭的第三位置。
7.根据权利要求1所述的废气模块，其特征在于，进一步包括过滤器，其中所述壳体的一个开口与所述过滤器流体连通。
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US7617678B2 (en) 2009-11-17
CN101943089A (zh) 2011-01-12
EP1848888A1 (en) 2007-10-31
EP2312146A1 (en) 2011-04-20
KR101299523B1 (ko) 2013-08-23
WO2006086419A1 (en) 2006-08-17
US20070068500A1 (en) 2007-03-29
US20110061625A1 (en) 2011-03-17
JP2008530423A (ja) 2008-08-07
KR20070102701A (ko) 2007-10-19
CN101115919A (zh) 2008-01-30
EP1848888B1 (en) 2010-12-01
CN101943089B (zh) 2015-09-23
DE602006018581D1 (de) 2011-01-13

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