CN101655052A - 防止egr系统炭烟污染 - Google Patents

防止egr系统炭烟污染 Download PDF

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Publication number
CN101655052A
CN101655052A CN200910166778A CN200910166778A CN101655052A CN 101655052 A CN101655052 A CN 101655052A CN 200910166778 A CN200910166778 A CN 200910166778A CN 200910166778 A CN200910166778 A CN 200910166778A CN 101655052 A CN101655052 A CN 101655052A
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China
Prior art keywords
passage
gas recirculation
exhaust gas
exhaust
particulate filter
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CN200910166778A
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English (en)
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M·科瓦尔奇克
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GM Global Technology Operations LLC
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GM Global Technology Operations LLC
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Publication of CN101655052A publication Critical patent/CN101655052A/zh
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/50Arrangements or methods for preventing or reducing deposits, corrosion or wear caused by impurities

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

Abstract

本发明涉及防止EGR系统炭烟污染。一种柴油机系统,设有排气通道,该排气通道具有设在该通道中的柴油微粒过滤器。废气再循环通道在所述柴油微粒过滤器的下游连接到所述排气通道并与进气通道连通。通过在所述柴油微粒过滤器下游的位置定位向排气通道的连接,使所述废气再循环通道和布置在其中的废气再循环冷却器免除了炭烟污染。

Description

防止EGR系统炭烟污染
技术领域
[0001]本发明涉及一种柴油机系统,尤其涉及一种包括废气再循环(EGR)管道的柴油机系统,其中所述废气再循环管道连接在柴油微粒过滤器下游废气通道上,以防止废气再循环通道冷却器的炭烟污染。
背景技术
[0002]这一部分的内容仅仅是提供与本发明相关的背景技术,并不构成现有技术。
[0003]以前,废气再循环输送管从柴油微粒过滤器上游的排气管分支。在柴油机上,排气通道在该位置具有许多炭烟。由于EGR冷却器的较低温度和小管道直径,所述炭烟往往聚集在废气再循环冷却器的壁上。
发明内容
[0004]本发明提供了柴油微粒过滤器下游的废气再循环通道的连接,以防止EGR冷却器的炭烟污染。
[0005]根据下文中所提供的详细描述,本发明适用性的其它方面也是显而易见的。应当理解,尽管示出了本发明的优选实施例,但是其详细描述和具体实例仅仅是示意性目的,而不是限制本发明的范围。
附图说明
[0006]本文所示的附图仅仅是示意性目的,而不是以任何方式限制本发明的范围。
[0007]附图为柴油机系统的示意图,所述柴油机系统具有连接在柴油微粒过滤器下游的废气再循环通道,以防止废气再循环冷却器的炭烟污染。
具体实施方式
[0008]下面的描述实质上仅仅是示意性的,而不是限制本发明及其应用或使用。
[0009]参考附图,根据本发明原理的发动机系统10包括具有进气歧管14和排气歧管16的柴油机12。进气歧管14连接到进气通道18,进气通道18包括布置在其中用于控制发动机12的进气通道的进气节气门20。
[0010]排气歧管16连接到排气通道22上,该排气通道22设有用于去除一氧化氮(NO)和二氧化碳(NO2)的柴油氧化催化剂(DOC)和NOX装置24以及设在尾管28上游的柴油微粒过滤器(DPF)26。柴油氧化催化剂和NOX装置各自都以本领域内公知的方式去除有害的废气成分,可为当前本领域中使用的任意已知装置。
[0011]废气再循环通道30设置为在柴油微粒过滤器26的下游位置与排气通道22连通,并与进气通道18连通。废气再循环通道30设有废气再循环阀32,有选择地控制该废气再循环阀32以便控制再循环回进气通道18的废气量。可根据先前已知的控制参数来控制废气再循环阀32,以将废气引入进气通道。废气再循环冷却器34也可设在废气再循环通道30中,用于在将废气引入进气通道18之前将废气冷却至期望的温度。
[0012]设置发动机控制器40以控制进气门20和排气再循环阀32的操作,从而提供新鲜空气与再循环废气的恰当混合。发动机控制器40还可响应于驾驶员输入及其它驱动条件来控制发动机的其它功能,如本领域所知的。
[0013]将废气再循环通道30从柴油微粒过滤器26的下游连接到排气通道22防止了废气再循环冷却器34因高炭烟污染而变得堵塞。这导致提高了柴油机上废气再循环系统的耐用性。

Claims (8)

1.一种发动机系统,包括:
柴油机;
连接到所述柴油机的排气通道;
布置在所述排气通道中的柴油微粒过滤器;
用于向所述柴油机供应空气的进气通道;以及
废气再循环通道,该废气再循环通道在所述柴油微粒过滤器的下游连接到所述排气通道,并与所述进气通道连通。
2.如权利要求1所述的发动机系统,还包括在所述废气再循环通道中的废气再循环冷却器。
3.如权利要求1所述的发动机系统,还包括在所述废气再循环通道中的废气再循环阀。
4.如权利要求3所述的发动机系统,还包括用于控制所述废气再循环阀的操作的发动机控制器。
5.一种用于柴油机的废气再循环系统,包括:
连接到所述柴油机的排气通道;
布置在所述排气通道中的柴油微粒过滤器;
废气再循环通道,该废气再循环通道在所述柴油微粒过滤器的下游连接到所述排气通道,并与所述柴油机的进气通道连通。
6.如权利要求5所述的废气再循环系统,还包括在所述废气再循环通道中的废气再循环冷却器。
7.如权利要求5所述的废气再循环系统,还包括在所述废气再循环通道中的废气再循环阀。
8.如权利要求7所述的废气再循环系统,还包括用于控制所述废气再循环阀的操作的发动机控制器。
CN200910166778A 2008-08-18 2009-08-18 防止egr系统炭烟污染 Pending CN101655052A (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US12/193241 2008-08-18
US12/193,241 US20100037872A1 (en) 2008-08-18 2008-08-18 Preventing egr system soot contamination

Publications (1)

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CN101655052A true CN101655052A (zh) 2010-02-24

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DE (1) DE102009037442A1 (zh)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010140951A1 (en) * 2009-06-02 2010-12-09 Volvo Lastvagnar Ab Exhaust gas after treatment system with temperature control
GB2475319A (en) * 2009-11-16 2011-05-18 Gm Global Tech Operations Inc Protecting a diesel engine long-route EGR system from excessive soot contamination

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9717034D0 (en) * 1997-08-13 1997-10-15 Johnson Matthey Plc Improvements in emissions control
US6138649A (en) * 1997-09-22 2000-10-31 Southwest Research Institute Fast acting exhaust gas recirculation system
DE202005001257U1 (de) * 2004-09-17 2005-04-07 Arvinmeritor Emissions Tech Abgasanlage eines Kfzs mit Dieselmotor
US7117843B2 (en) * 2004-10-07 2006-10-10 International Engine Intellectual Property Company, Llc Emission reduction in a diesel engine using an alternative combustion process and a low-pressure EGR loop
US6973786B1 (en) * 2004-10-12 2005-12-13 International Engine Intellectual Property Company, Llc Emission reduction in a diesel engine by selective use of high-and low-pressure EGR loops
DE102007031912A1 (de) * 2006-07-11 2008-02-07 Denso Corp., Kariya Abgaswärmetauscher
DE102006038706B4 (de) * 2006-08-18 2018-12-27 Volkswagen Ag Brennkraftmaschine mit Niederdruck-Abgasrückführung
US7805926B2 (en) * 2007-04-30 2010-10-05 Caterpillar Inc Exhaust treatment system having an acidic debris filter

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US20100037872A1 (en) 2010-02-18

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