CN108278149B - 排气设备 - Google Patents

排气设备 Download PDF

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Publication number
CN108278149B
CN108278149B CN201711389187.9A CN201711389187A CN108278149B CN 108278149 B CN108278149 B CN 108278149B CN 201711389187 A CN201711389187 A CN 201711389187A CN 108278149 B CN108278149 B CN 108278149B
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exhaust
exhaust gas
duct
channel
region
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CN108278149A (zh
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F·诺依曼
A·考德雷尔
W·达兹
P·魏因曼
S·克拉默尔
A·绍尔
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Prim Co.,Ltd.
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Eberspaecher Exhaust Technology GmbH and Co KG
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/08—Other arrangements or adaptations of exhaust conduits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N11/00—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity
    • F01N11/002—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity the diagnostic devices measuring or estimating temperature or pressure in, or downstream of the exhaust apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/009—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series
    • F01N13/0097—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series the purifying devices are arranged in a single housing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/14—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having thermal insulation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
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    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
    • F01N3/0234—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles using heat exchange means in the exhaust line
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    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
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    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/033—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices
    • F01N3/035—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices with catalytic reactors, e.g. catalysed diesel particulate filters
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    • F01N3/103—Oxidation catalysts for HC and CO only
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    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
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    • F01N3/105—General auxiliary catalysts, e.g. upstream or downstream of the main catalyst
    • F01N3/106—Auxiliary oxidation catalysts
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    • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
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    • F01N3/2066—Selective catalytic reduction [SCR]
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    • F01N2240/36—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being an exhaust flap
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    • F01N2260/08—Exhaust treating devices having provisions not otherwise provided for for preventing heat loss or temperature drop, using other means than layers of heat-insulating material
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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Materials Engineering (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Exhaust Silencers (AREA)
  • Processes For Solid Components From Exhaust (AREA)
  • Exhaust Gas Treatment By Means Of Catalyst (AREA)

Abstract

本发明涉及一种用于内燃机、特别是柴油内燃机的排气设备，所述排气设备包括排气流动通道(12)，其中，在所述排气流动通道(12)的排气再处理通道区域(16)中设置有至少一个排气再处理单元(23、26、28、30)，其中，所述排气流动通道(12)的排气再处理通道区域(16)至少局部地在能由从所述排气再处理通道区域(16)排出的排气流过的隔绝体积(20)中延伸。

Description

排气设备
技术领域
本发明涉及一种用于内燃机、特别是柴油内燃机的排气设备，所述排气设备优选可以在载货车或载客车中用作驱动机构的柴油内燃机中应用。
背景技术
在这种排气设备中使用不同的排气再处理单元、例如催化器布置系统或颗粒过滤器，以便减少污染物排放。主要是催化器布置系统为了有效地转化在燃烧排气中运输的污染物必须具有在至少200℃至250℃范围内的温度。此外，这样高的温度确保可靠地蒸发作为用于选择性地催化还原的反应剂注入到排气流中的尿素溶液。因为主要是在内燃机的运行开始时之前未被燃烧排气流过或者说环流的催化器布置系统将具有明显低于这种激活温度的温度，所以直至在催化器布置系统的区域中达到必需的温度时排气流基本上未经处理并且以高的污染物份额排放。法定要求越来越严格地缩短了这样的持续时间，在该持续时间期间允许这样高的污染物份额。
发明内容
本发明的任务在于，规定一种用于内燃机、特别是柴油内燃机的排气设备，利用该排气设备可以在结构简单的构造方案中减少污染物排放。
按照本发明，该任务通过一种用于内燃机、特别是柴油内燃机的排气设备得以解决，所述排气设备包括排气流动通道，其中，在所述排气流动通道的排气再处理通道区域中设置有至少一个排气再处理单元，其中，所述排气流动通道的排气再处理通道区域至少局部地在能由从所述排气再处理通道区域排出的排气流过的隔绝体积中延伸。
按照本发明构造的排气设备利用在流过排气再处理通道区域之后也还在排气流中运输的热，用于达到改进的热隔绝并且因此较快速地加热应进行排气再处理的系统区域。这特别是在运行启动阶段中导致直至达到确保有效地排气再处理的温度时的明显缩短的持续时间。如果这是必需的话，在运行内燃机期间也可以利用在流过排气再处理通道区域之后在排气流中也还运输的余热，以便保护排气设备的为了有效地排气处理需要相对高温度的系统区域以防过度冷却。
为了有效地利用在由内燃机排出的排气中运输的余热提出：基本上所述排气流动通道的整个排气再处理通道区域在所述隔绝体积中延伸。
为了能够将在排气中运输的热选择性地用于加热排气再处理单元，或者如果这不是必需的话能够朝向周围环境导出，提出：所述排气再处理通道区域朝所述隔绝体积的排气进入区域和所述排气流动通道的排气排出通道区域敞开。
在此，排气流的分配例如可以通过以下方式实现，即，与所述排气排出通道区域相配地设置有能为了封闭和释放所述排气排出通道区域而调节的封闭单元。所述封闭单元可以包括封闭活门，所述封闭活门在所述排气排出通道区域中在基本上封闭所述排气排出通道区域以防流过的封闭位置与释放所述排气排出通道区域以流过的释放位置之间可调节地设置。在此，所述封闭活门优选也可以定位在释放位置与封闭位置之间的所有中间位置中。
为了将流过排气设备的排气朝向周围环境或朝沿流动方向后续的系统区域、例如消音器排出，与是否利用在排气中运输的余热无关地提出：所述隔绝体积和所述排气排出通道区域朝所述排气流动通道的排气导出通道区域敞开。
为了有效地排气再处理，在所述排气再处理通道区域中可以设置有催化氧化器布置系统或/和颗粒过滤器布置系统或/和选择性催化还原催化器布置系统或/和氨阻塞催化器布置系统。
为了在设置催化氧化器布置系统和选择性催化还原催化器布置系统作为排气再处理单元时能够实现在选择性催化还原催化器布置系统的区域中实施的选择性催化还原，提出：在所述催化氧化器布置系统下游设置有选择性催化还原催化器布置系统，并且在所述催化氧化器布置系统下游且在所述选择性催化还原催化器布置系统上游设置有反应剂输入布置系统。
因为在对一个或多个排气再处理单元的附加加热不是必需的运行状态中应使排气设备的流动阻力尽可能小地保持，所以为了提供关于处于或者说是否处于这种运行状态的信息，提出：与至少一个排气再处理单元相配地设置有温度传感器。
由这种温度传感器提供的信息可以在按照本发明的排气设备中以有利的方式通过以下方式得以利用，即，与所述封闭单元相配地设置有由操控单元操控的伺服驱动装置，其中，所述操控单元构造用于基于至少一个配设给所述排气再处理单元的温度传感器的输出信号操控所述伺服驱动装置。
按照本发明的排气设备的紧凑的结构型式可以通过以下方式实现，即，所述排气流动通道的排气再处理通道区域包括第一通道区段、第二通道区段和连接所述第一通道区段与所述第二通道区段的第三通道区段，其中，在所述第一通道区段中和在所述第二通道区段中分别设置有至少一个排气再处理单元并且所述第一通道区段中的排气主流动方向基本上与所述第二通道区段中的排气主流动方向同向并且所述第三通道区段中的排气主流动方向基本上与所述第一通道区段中和所述第二通道区段中的排气主流动方向反向。在此，优选所述第一通道区段和所述第二通道区段沿所述第一通道区段中和所述第二通道区段中的排气主流动方向优选相互基本上完全重叠地设置。
附图说明
下面参考附图详细描述本发明。附图中：
图1示出在运行状态中的排气设备的原理图，在该运行状态中利用流过排气设备的排气，用于排气再处理单元的改进的隔绝；
图2示出与图1相对应的图，其中，所述排气设备处于运行状态中，在所述运行状态中利用流过排气设备的排气，用于排气再处理单元的改进的隔绝。
具体实施方式
在图1中，例如要与柴油内燃机相结合地使用的排气设备一般以10标记。在图1中以原理图示出的排气设备10包括构造有一个或多个管或管区段的排气流动通道12，该排气流动通道以排气导入通道区域14引导到一般以16标记的排气再处理通道区域。排气再处理通道区域16设置在例如在壳体18中构成的隔绝体积20中。
排气再处理通道区域16包括第一通道区段22，在该第一通道区段中沿流动方向相继地设置有柴油催化氧化器布置系统23和柴油颗粒过滤器布置系统26。在定位在第一通道区段22下游的第二通道区段24中沿流动方向相继地设置有选择性催化还原催化器布置系统28和氨阻塞催化器布置系统30。为了能够在选择性催化还原催化器布置系统28处实施选择性催化还原，在其上游并且优选关于柴油催化氧化器布置系统23或者说柴油颗粒过滤器布置系统26在下游设置有一般也称为注射器的反应剂输入布置系统29。该反应剂输入布置系统例如可以定位在第三通道区段27中，以便将反应剂R、例如尿素溶液/水溶液注入到在那里流动的排气中并且与其混合。
构造有作为排气再处理单元的柴油催化氧化器布置系统23、柴油颗粒过滤器布置系统26、选择性催化还原催化器布置系统28和氨阻塞催化器布置系统30的排气再处理通道区域16与其三个通道区段22、24、27如此设置，使得所述通道区段原则上彼此平行，并且第一通道区段22中和第二通道区段24中的排气主流动方向基本上彼此平行且同向，而第三通道区段27中的排气主流动方向与第一通道区段22中或者说第二通道区段24中的排气主流动方向基本上反向。因此，排气再处理通道区域16的波纹状的构造特别是在设置有排气再处理单元的区域中实现，这有助于非常紧凑的结构型式，该结构型式特别是可以如此容纳在对应紧凑地构造的壳体18中，使得排气再处理通道区域16可以由流过隔绝体积的排气至少局部、优选基本上完全环流。为此，可以设置有在图1中未示出的附加的流动引导元件，所述流动引导元件用于使离开排气再处理通道区域且在排气进入区域32中进入到隔绝体积20中的排气在其朝向排气导出通道区域34离开隔绝体积之前沿着排气再处理通道区域16的整个外表面引导。要指出的是，也可以设置有包含不同的排气再处理单元的通道区段的其他空间布置系统，例如基本上线性相继地设置。
与连接排气再处理通道区域16和排气导出通道区域34的排气排出通道区域36相配地设置有一般以38标记的封闭单元38。该封闭单元包括定位在排气排出通道区域36中的封闭活门40，该封闭活门能在图1中示出的封闭位置与在图2中示出的释放位置之间调节。为此，封闭活门40配设有例如电动地工作的伺服驱动装置42，该伺服驱动装置由操控单元44操控地在图1的封闭位置与图2的释放位置之间调节封闭活门40并且也可以将其置于和保持在这两个位置之间的中间位置中。
此外，排气设备10包括多个温度传感器，所述温度传感器可以检测流过排气流动通道12的排气在不同位置处的温度、必要时也可以检测所述排气再处理单元中的不同排气再处理单元的温度。因此，例如在柴油催化氧化器布置系统23下游设置有温度传感器46。在选择性催化还原催化器布置系统下游设置有温度传感器48。温度传感器46、48和必要时还有其他设置在不同位置处的温度传感器将其代表分别由所述传感器检测的温度的信号馈入到操控单元44中，该操控单元基于所述信号操控伺服驱动装置42，用于将封闭活门40调节或者说保持在预定的位置中。在操控封闭活门40时也可以考虑其他表征运行的参量、例如压力或排气成分。
利用按照本发明构造的排气设备10，当内燃机的运行开始并且排气设备10本身与离开内燃机的排气一样仍具有相对低的温度时，例如可以通过借助于封闭活门40封闭排气排出通道区域36用于使离开内燃机的燃烧排气能够在流过排气再处理通道区域16之后不直接到达排气导出通道区域34中。具体而言，离开排气再处理通道区域16且还运输余热的排气通过定位在其封闭位置中的封闭活门40引导到隔绝体积20中，在那里排气在排气再处理通道区域16的外侧上环流该排气再处理通道区域并且在此有助于特别是设置在其中的排气再处理单元的改进的热隔绝，以避免向外的热损耗并且必要时例如在暂时还没有被排气加热的排气再处理单元中也从外部加热所述排气再处理单元。在流过绝缘体20之后明显进一步冷却的排气才朝向排气导出通道区域34从隔绝体积20排出。
这种状态可以如此长时间地保持或者说当如此长时间地借助于一个或多个温度传感器46、48检测到排气再处理通道区域16和特别是一个或多个设置在其中的排气再处理单元仍具有这样低的温度时才调整，使得有效的排气再处理仍不被确保。如果排气再处理通道区域16中的温度、特别是不同的催化器布置系统的区域中的温度达到处于200℃至250℃的范围内或者说高于该温度范围且因此确保在不同的催化器布置系统中有效地实施催化反应的温度水平，则封闭活门40可以朝向其在图2中示出的释放位置调节，以便因此能实现离开排气再处理通道区域16的排气经由排气排出通道区域36流出。因为经由排气排出通道区域36的流动路径具有比穿过隔绝体积20的流动路径小得多的流动阻力，所以在封闭活门40定位在其释放位置中时基本上离开排气再处理通道区域16的全部排气流经由排气排出通道区域36向排气导出通道区域34中流动。当在排气再处理单元充分升温之后隔绝体积20未被排气流过时，所述排气才形成有助于排气再处理单元的改进的热隔绝的空气体积。
如果在装备有这种排气设备10的车辆的行驶运行期间出现在一个或多个排气再处理单元的区域中的温度降低到可以确保不再有效地实施催化反应的值上的状态，例如在内燃机在低负荷状态中较长时间地连续运行时，则封闭活门40可以有朝向其封闭位置调节，以便用于使离开排气再处理通道区域16的排气流的至少一部分又引导穿过隔绝体积20，以便通过排气再处理单元与相对冷的周围环境的改进的热隔离来避免排气再处理单元的进一步冷却或者说用于在该运行状态中也可以使设置在排气再处理通道区域16中的排气再处理单元通过流过所述排气再处理单元的排气保持在对于排气再处理单元的运行必需的温度上。
最后要指出的是，本发明的原理不言而喻也可以应用在结构不同地构造的排气设备中。因此，通道区段22、24例如可以相互连续地、亦即沿排气主流动方向不相互重叠地设置。要设置在排气再处理通道区域中的排气再处理单元也可以根据要与这种排气设备相结合地运行的内燃机来选择。

Claims (11)

1.用于内燃机的排气设备，所述排气设备包括排气流动通道(12)，其中，在所述排气流动通道(12)的排气再处理通道区域(16)中设置有至少一个排气再处理单元(23、26、28、30)，其中，所述排气流动通道(12)的排气再处理通道区域(16)至少局部地在能由从所述排气再处理通道区域(16)排出的排气流过的隔绝体积(20)中延伸，其中，所述排气流动通道(12)的排气再处理通道区域(16)包括第一通道区段(22)、第二通道区段(24)和连接所述第一通道区段(22)与所述第二通道区段(24)的第三通道区段(27)，其中，在所述第一通道区段(22)中并且在所述第二通道区段(24)中分别设置有至少一个排气再处理单元(23、26、28、30)，所述第一通道区段(22)中的排气主流动方向与所述第二通道区段(24)中的排气主流动方向同向并且所述第三通道区段(27)中的排气主流动方向与所述第一通道区段(22)中和所述第二通道区段(24)中的排气主流动方向反向，其中，所述排气再处理通道区域(16)的第二通道区段(24)朝所述隔绝体积(20)的排气进入区域(32)以及所述排气流动通道(12)的排气排出通道区域(36)敞开，其中，与所述排气排出通道区域(36)相配地设置有能为了封闭和释放所述排气排出通道区域(36)而调节的封闭单元(38)。
2.根据权利要求1所述的排气设备，其特征在于，所述排气流动通道(12)的整个排气再处理通道区域(16)在所述隔绝体积(20)中延伸。
3.根据权利要求1或2所述的排气设备，其特征在于，所述封闭单元(38)包括封闭活门(40)，所述封闭活门在所述排气排出通道区域(36)中在封闭所述排气排出通道区域以防流过的封闭位置与释放所述排气排出通道区域以流过的释放位置之间可调节地设置。
4.根据权利要求1或2所述的排气设备，其特征在于，所述隔绝体积(20)和所述排气排出通道区域(36)朝所述排气流动通道(12)的排气导出通道区域(34)敞开。
5.根据权利要求1或2所述的排气设备，其特征在于，在所述排气再处理通道区域(16)中设置有催化氧化器布置系统(23)或/和颗粒过滤器布置系统(26)或/和选择性催化还原催化器布置系统(28)或/和氨阻塞催化器布置系统(30)。
6.根据权利要求5所述的排气设备，其特征在于，所述选择性催化还原催化器布置系统(28)设置在所述催化氧化器布置系统(23)下游，并且在所述催化氧化器布置系统(23)下游且在所述选择性催化还原催化器布置系统(28)上游设置有反应剂输入布置系统(29)。
7.根据权利要求1或2所述的排气设备，其特征在于，与至少一个排气再处理单元(23、28)相配地设置有温度传感器(46、48)。
8.根据权利要求7所述的排气设备，其特征在于，与所述封闭单元(38)相配地设置有由操控单元(44)操控的伺服驱动装置(42)，其中，所述操控单元(44)构造用于基于至少一个配设给所述排气再处理单元(23、28)的温度传感器(46、48)的输出信号操控所述伺服驱动装置(42)。
9.根据权利要求1或2所述的排气设备，其特征在于，所述第一通道区段(22)和所述第二通道区段(24)沿所述第一通道区段(22)中和所述第二通道区段(24)中的排气主流动方向相互重叠。
10.根据权利要求9所述的排气设备，其特征在于，所述第一通道区段(22)和所述第二通道区段(24)沿所述第一通道区段(22)中和所述第二通道区段(24)中的排气主流动方向相互完全重叠。
11.根据权利要求1或2所述的排气设备，其特征在于，所述排气设备设置用于柴油内燃机。
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JP6570665B2 (ja) 2019-09-04
CN108278149A (zh) 2018-07-13
EP3346103B1 (de) 2019-05-22
US10697338B2 (en) 2020-06-30
US20180187584A1 (en) 2018-07-05
JP2018115660A (ja) 2018-07-26

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