CN106121872A - 应用于专用egr发动机的冷凝水注入 - Google Patents

应用于专用egr发动机的冷凝水注入 Download PDF

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CN106121872A
CN106121872A CN201610257594.3A CN201610257594A CN106121872A CN 106121872 A CN106121872 A CN 106121872A CN 201610257594 A CN201610257594 A CN 201610257594A CN 106121872 A CN106121872 A CN 106121872A
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exhaust gas
cylinder
gas recirculation
condensate
cooler
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E·J·基廷
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GM Global Technology Operations LLC
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GM Global Technology Operations LLC
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    • 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
    • F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
    • F02M25/022—Adding fuel and water emulsion, water or steam
    • F02M25/025—Adding water
    • F02M25/03—Adding water into the cylinder or the pre-combustion chamber
    • 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
    • F02M26/13—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
    • 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
    • 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
    • F02B29/04—Cooling of air intake supply
    • F02B29/045—Constructional details of the heat exchangers, e.g. pipes, plates, ribs, insulation, materials, or manufacturing and assembly
    • F02B29/0468—Water separation or drainage 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
    • F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
    • F02M25/022—Adding fuel and water emulsion, water or steam
    • F02M25/0221—Details of the water supply system, e.g. pumps or arrangement of valves
    • F02M25/0222—Water recovery or storage
    • 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
    • F02M26/13—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
    • 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
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/42—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories having two or more EGR passages; EGR systems specially adapted for engines having two or more cylinders
    • F02M26/43—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories having two or more EGR passages; EGR systems specially adapted for engines having two or more cylinders in which exhaust from only one cylinder or only a group of cylinders is directed to the intake of the engine
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Exhaust-Gas Circulating Devices (AREA)

Abstract

一种内燃机包括限定多个气缸的发动机结构。所述多个气缸中的一个是专用排气再循环气缸，其中与专用排气再循环气缸连通的排气通道是排气再循环通道，排气再循环通道与进气歧管连通，进气歧管与所述多个进气通道连通。排气再循环冷却器与排气再循环通道连通。增压空气冷却器与进气/排气再循环混合器连通。冷凝物收集容器被设置用于从排气再循环冷却器和增压空气冷却器之一或两者收集冷凝物。注入系统将来自冷凝物收集容器的冷凝物注入所述多个气缸。

Description

应用于专用EGR发动机的冷凝水注入
技术领域
本发明涉及内燃机，更具体地涉及具有专用排气再循环气缸的内燃机使用的冷凝水收集和注入。
背景技术
本部分提供本发明所涉及的背景信息，其不一定是现有技术。
利用专用排气再循环气缸的内燃机是本领域中已知的。专用排气再循环系统利用专门用于再次引入的发动机气缸中产生的排气作为排气再循环。通过使用专用排气再循环气缸技术，已证实提高了车辆燃料效率。
排气由10-15％的水组成。在专用排气再循环发动机中再循环的排气经由排气再循环冷却器进行第一次冷却，然后在与引入空气混合之后通过增压空气冷却器进行再次冷却。在每个冷却阶段，根据大气和操作条件可能会出现大量的冷凝物。对这种冷凝物的管理给专用排气再循环技术的实现提出挑战。
发明内容
本部分提供本发明的总体概述，而不是其全部范围或所有特征的全面公开内容。
一种内燃机包括发动机结构，所述发动机结构限定多个气缸、与该多个气缸连通的多个进气通道以及与多个气缸连通的多个排气通道。多个气缸中的一个是专用排气再循环气缸，其中与专用排气再循环气缸连通的排气通道是排气再循环通道，排气再循环通道与进气歧管连通，进气歧管与多个进气通道连通。排气再循环冷却器与排气再循环连通。增压空气冷却器与进气/排气再循环混合器连通。冷凝物收集容器被设置用于从排气再循环冷却器和增压空气冷却器之一或两者收集冷凝物。注入系统将来自冷凝物收集容器的冷凝物注入多个气缸。
从本文提供的描述中可以很明显地看出另外的应用领域。在本发明内容中的描述和具体示例仅用于说明的目的，并不旨在限制本发明的范围。
附图说明
本文中描述的图仅用于说明所选择的实施例，而不是所有可能的实施方式，并且不旨在限制本发明的范围。
附图是一种内燃机的示意图，所述内燃机具有专用排气再循环，并利用冷凝水收集罐、泵和注入系统，将冷凝水注入气缸，以提高燃料效率。
在附图的几个视图中，相应的附图标记表示相应的部分。
具体实施方式
现在，将参照附图对示例性实施例进行更加充分的描述。
提供示例性实施例是为了使本发明更完整，并且向本领域技术人员充分地传达范围。阐述了许多具体的细节，诸如具体部件、设备和方法的示例，以提供对本发明实施例的透彻理解。对本领域技术人员来说显而易见的是，不需要采用具体细节，示例性实施例可体现为许多不同的形式，并且也不应该被理解为限制本发明的范围。在一些示例性实施例中，对公知的工艺、公知的装置结构和公知的技术没有进行详细描述。
本文所使用的术语仅用于描述特定的示例性实施例的目的，并非旨在进行限制。如本文中所用的，单数形式的“一”、“一个”和“该”也可以用来包括复数形式，除非上下文清楚地另外指明。术语“包括”、“包括着”、“包含”和“具有”都是包含性的，因此规定了所述特征、整数、步骤、操作、元件和/或部件的存在，但不排除一个或多个其它特征、整数、步骤、操作、元件、组件和/或其群组的存在或增加。本文所描述的方法步骤、过程和操作不应被理解为一定要按照所讨论或示出的特定顺序执行，除非特别指出为执行顺序。还应当理解的是，可以采用附加或替代的步骤。
当一个元件或层被称为在另一元件或层“上”、“接合到”、“连接到”或“联接到”另一元件或层时，其可以直接在另一元件或层上、接合到、连接到或联接到另一元件或层，或可以存在中间元件或层。相反，当一个元件被称为“直接在”另一元件或层“上”、“直接接合到”、“直接连接到”或“直接联接到”另一元件或层时，可以没有中间元件或层。用于描述元件之间关系的其它词语应该以类似的方式理解(例如，“之间”与“直接之间”，“相邻”与“直接相邻”等)。如本文中所用的，术语“和/或”包括一个或多个相关所列项目的任意组合和所有组合。
参照附图，内燃机10被示为包括发动机结构12，发动机结构12限定多个气缸14，其中一个气缸是专用排气再循环(EGR)气缸14D。发动机10被示为直列式四缸发动机，但应当理解的是，可以使用其它发动机布置，包括各种数目的气缸、并包括V形配置以及其它配置。发动机10可经由入口16供应进气，空气可以提供至涡轮增压器18并由其压缩机20压缩。然后，吸入空气通过进气通道22和节流阀24提供至进气歧管26，进气歧管26将吸入空气提供至多个气缸14的进气口。
除去一个之外的全部气缸14被连接至排气歧管28，排气歧管28被连接至将排气提供至涡轮增压器18的涡轮32的排气通道30。然后，来自涡轮32的排气被导向排气通道34，排气通道34可以包括被连接至排气管38的排气处理系统36。
专用EGR气缸14D包括可以被连接至旁通阀42的排气通道40和被连接至排气通道34的旁通通道44。排气通道40还被连接至包括排气再循环冷却器48的排气再循环通道46。排气再循环通道46可以被连接至将再循环的排气与来自进气通道22的压缩后的吸入空气混合的混合器50。在进气通道中设置水冷却增压空气冷却器52以进一步冷却混合后的吸入空气和再循环的排气。
冷凝物收集罐54被提供用于接收来自排气再循环冷却器48和水冷却增压空气冷却器52的冷凝物。可选地，来自排气再循环冷却器48和水冷却增压空气冷却器52的冷凝物可以经重力供给或泵送到冷凝物收集罐54。另外，冷凝物收集罐可以形成为排气再循环冷却器48和水冷却增压空气冷却器52中之一或两者的延伸部分。泵56与冷凝物收集罐54连通，并且与冷凝水注入通道58连通，冷凝水注入通道58被连接至冷凝物注入器60，冷凝物注入器60可操作为将冷凝物直接注入每个气缸14、14D或可替代地注入导向气缸14、14D的进气口。冷凝物注入器为发动机燃料注入器的补充。
已经显示，以喷雾的形式将冷凝水注入内燃机的气缸可以由于燃烧过程的改善而将燃料效率提高3.5％。冷凝物收集罐、泵56和冷凝物注入器60的添加提高了发动机10的燃料效率，同时为实现专用排气再循环克服了主要挑战。
提供对实施例的上文描述是为了实现说明和描述的目的。其并不意图是穷尽的或限制本发明。特定实施例的各个元件或特征通常不限于该特定实施例，而是在适用时可互换并且可以用于所选择的实施例中，即使未具体示出或描述也是如此。本发明还可以以许多方式变化。这样的变化不能视为脱离本发明，并且所有这样的修改都应认为被包括在本发明的范围内。

Claims (1)

1.一种内燃机，包括：
发动机结构，所述发动机结构限定多个气缸、与所述多个气缸连通的多个进气通道以及与所述多个气缸连通的多个排气通道，所述多个气缸中的一个气缸为专用排气再循环气缸，其中与所述专用排气再循环气缸连通的排气通道为排气再循环通道，所述排气再循环通道与进气歧管连通，所述进气歧管与所述多个进气通道连通；
排气再循环冷却器，所述排气再循环冷却器与所述排气再循环通道连通；
冷凝物收集容器，所述冷凝物收集容器用于收集来自所述排气再循环冷却器的冷凝物；以及
注入系统，所述注入系统用于将来自所述冷凝物收集容器的冷凝物注入所述多个气缸。
CN201610257594.3A 2015-05-06 2016-04-22 应用于专用egr发动机的冷凝水注入 Pending CN106121872A (zh)

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US14/705,584 US20160326992A1 (en) 2015-05-06 2015-05-06 Water condensate injection applied to dedicated egr engine
US14/705584 2015-05-06

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