CN1981116A - 排气后处理装置 - Google Patents

排气后处理装置 Download PDF

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CN1981116A
CN1981116A CNA2005800188306A CN200580018830A CN1981116A CN 1981116 A CN1981116 A CN 1981116A CN A2005800188306 A CNA2005800188306 A CN A2005800188306A CN 200580018830 A CN200580018830 A CN 200580018830A CN 1981116 A CN1981116 A CN 1981116A
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fuel injection
exhaust gas
treatment device
gas post
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CN100449132C (zh
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平野隆司
佐藤康弘
野本和广
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Bosch Corp
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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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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    • 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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
    • B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
    • B01D46/2418—Honeycomb filters
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    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/42—Auxiliary equipment or operation thereof
    • B01D46/44—Auxiliary equipment or operation thereof controlling filtration
    • B01D46/46—Auxiliary equipment or operation thereof controlling filtration automatic
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    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/66—Regeneration of the filtering material or filter elements inside the filter
    • B01D46/80—Chemical processes for the removal of the retained particles, e.g. by burning
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
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    • 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
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    • 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
    • F01N3/0231—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 special exhaust apparatus upstream of the filter for producing nitrogen dioxide, e.g. for continuous filter regeneration systems [CRT]
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    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—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
    • 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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    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—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
    • 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
    • F01N3/2006—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating
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    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
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    • F01N3/24—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 constructional aspects of converting apparatus
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    • F02D41/0235—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus
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    • F02D41/029—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to purge or regenerate the exhaust gas treating apparatus the exhaust gas treating apparatus being a particulate filter
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Abstract

一种排气后处理装置(30)，具有：用于接受通过催化剂转换器(31)的排气并收集排气中的颗粒的颗粒过滤器(32)；用于进行用于催化剂转换器(31)的活性化的二次燃料喷射的喷射器(6～9)；进行二次燃料喷射控制的过滤器控制单元(36)，其中，过滤器控制单元(36)具有：用于判别是否应该令二次燃料喷射动作开始的判别部；响应该判别部而二次燃料喷射动作开始时计算出二次燃料喷射动作的开始后的燃料喷射量的累积值的计算部，在累积值到达既定值的情况下停止二次燃料喷射动作。由此，适当地进行用于令催化剂转换器活性化的二次燃料喷射控制。

Description

排气后处理装置
技术领域
本发明涉及用于净化内燃机的排气的排气后处理装置。
背景技术
为了除去内燃机，特别是柴油内燃机的运转而产生的排气中生成的NOx以及黑烟等的颗粒，以往公知有下述排气后处理装置：将令排气中的碳化氢氧化并燃烧的催化剂转换器和用于收集颗粒的颗粒过滤器组合起来，利用催化剂转换器的发热而促进由颗粒过滤器收集起来的颗粒的燃烧(特开平8-42326号公报)。
但是，这种催化剂转换器必须在升温为一定温度而令其活性化后才能发挥期望的效果。因此，公知有如特开平8-296485号公报所公开的那样的方法：检测催化剂的温度等而判别催化剂是否处于活性状态，并在判别催化剂为非活性状态的情况下，在比本来的燃烧喷射时机晚的既定时机向气缸内进行所谓的称为二次燃料喷射的追加燃料喷射，由此进行催化剂的活性化。
但是，以往的二次燃料喷射的控制，在判别催化剂为非活性状态的情况下，在主喷射后的既定的时机，将与该时机的内燃机的运转条件或外部环境条件等对应的量的燃料间歇地喷射到气缸内，由此促进催化剂的活性化。
因此，在内燃机的运转条件或外部环境条件等在某种程度上恒定的情况下不会产生问题，但在这些条件有比较大的变动的运转环境下，不能按照预定借助二次燃料喷射来促进催化剂的活性化，造成徒然消耗燃料的结果，成为燃耗降低的主要原因，并且将大量未燃烧燃料与排气一起排放到大气中，具有反而增大环境污染的问题。
本发明的目的在于提供一种可解决现有技术中的上述问题点的改善后的排气后处理装置。
本发明的目的在于提供一种可实现适当的二次燃料喷射控制的改善后的排气后处理装置。
发明内容
本发明的特征点在于，一种排气后处理装置，具有：令内燃机的排气中含有的碳化氢氧化、燃烧的催化剂转换器；用于接受通过该催化剂转换器后的排气并收集排气中的颗粒的颗粒过滤器；用于喷射供给用于上述催化剂转换器的活性化的燃料的燃料喷射部件；用于控制该燃料喷射部件的燃料喷射动作的控制部，其中，上述控制部具有：用于判别是否应该令用于上述催化剂转换器的活性化的燃料喷射动作开始的判别部；响应该判别部而在开始上述燃料喷射动作时，计算出上述燃料喷射动作的开始后的燃料喷射量的累积值的计算部；响应上述计算部而在上述累积值到达既定值时，令上述燃料喷射动作停止的喷射动作停止部。
根据本发明，在使用催化剂转换器而令供给到颗粒过滤器中的排气的温度上升的排气后处理装置中，可适当地进行用于催化剂的活性化的燃料喷射动作的控制。
附图说明
图1是表示将本发明应用到柴油机用排气后处理装置时的一实施例的整体构成图。
图2是燃料喷射装置控制单元的详细框图。
图3是表示在过滤器控制单元中执行的过滤器控制程序的流程图。
图4A是用于说明排气后处理装置的动作的图。
图4B是用于说明排气后处理装置的动作的图。
图4C是用于说明排气后处理装置的动作的图。
图4D是用于说明排气后处理装置的动作的图。
具体实施方式
为了更详细地说明本发明，按照附图对其进行说明。
图1是表示将本发明应用到柴油机用排气后处理装置时的一实施例的整体构成图。附图标记1表示的是4缸的柴油机，在各气缸2-5内分别设置有作为燃料喷射部件的喷射器6～9。这些喷射器6～9的动作由燃料喷射装置控制单元10来控制，如后述那样，成为可在需要的时机以需要量向对应的气缸内喷射供给高压燃料的公知的构成。
在连接到进气岐管11的进气管道12上，设置中间冷却器13以及空气滤清器14，另一方面，在排气岐管15上连接有排气管道16。
在进气管道12和排气管道16之间，设置着设有EGR控制阀17的再循环通路18，由被燃料喷射装置控制单元10控制的致动器19来调节EGR控制阀17的开度。由此，构成为可将在排气管道16内流动的排气的一部分调节到进气岐管11中而送回。附图标记20表示的是排气涡轮增压器，包括配设在排气管道16内的排气涡轮21和配设在进气管道12内并被排气涡轮21驱动的压缩机22。
总体地用附图标记30表示的排气后处理装置具有：令内燃机的排气中所含有的碳化氢氧化、燃烧的催化剂转换器31；用于接受通过催化剂转换器31后的排气并收集排气中的颗粒的颗粒过滤器32，在排气管道16内流动的排气首先流到催化剂转换器31，然后流到颗粒过滤器32中。催化剂转换器31，在例如蜂窝状的由堇青石或者耐热钢构成的载持体的表面上涂敷活性氧化铝等而形成底层(wash coat)，在该涂层上载持由白金、钯、或者铑等的贵金属构成的催化剂活性成分。催化剂转换器令排气中的NO氧化而生成NO2，并且令排气中的HC和CO氧化而生成H2O和CO2。
颗粒过滤器32，使用称为壁流型的蜂窝过滤器或纤维型过滤器来收集排气中的颗粒，所述蜂窝过滤器由例如多孔质的堇青石、或者碳化硅而形成多个平行的小室，并交替封闭小室的入口和出口，所述纤维型过滤器在不锈钢多孔管上卷绕多层陶瓷纤维。
在颗粒过滤器32的入口侧(前)和出口侧(后)分别设置用于检测排气压力的第1压力传感器33以及第2压力传感器34。从第1压力传感器33输出表示颗粒过滤器32的入口侧的排气压力P1的第1压力信号S1，从第2压力传感器34输出表示颗粒过滤器32的出口侧的排气压力P2的第2压力信号S2。附图标记35表示的是用于检测颗粒过滤器32的入口侧(前)的排气温度的温度传感器。来自温度传感器35的排气温度信号T与第1压力信号S1以及第2压力信号S2一起输入到过滤器控制单元36中。在过滤器控制单元36中，还从速度传感器37输入表示柴油机1的转速的柴油机速度信号N。
过滤器控制单元36，根据需要而输出用于控制来自喷射器6～9的用于催化剂转换器31的活性化的燃料喷射(本说明书中称为二次燃料喷射)的控制信号CS。控制信号CS被送入到燃料喷射装置控制单元10中。
在燃料喷射装置控制单元10中，除了控制信号CS外，还输入有来自检测柴油机速度信号N以及油门踏板(未图示)的操作量的油门传感器38的油门信号A，响应这些信号而输出用于驱动喷射器6～9的驱动信号M1～M4。喷射器6～9分别被对应的驱动信号M1～M4开闭控制，向各气缸内喷射供给未图示的共轨式燃料喷射装置的共轨内的高压燃料。
图2是燃料喷射装置控制单元10的详细框图。燃料喷射装置控制单元10具有响应油门信号A以及柴油机速度信号N而计算应该向柴油机1的各气缸2～5内喷射的主燃料喷射量的主喷射量运算部10A，从主喷射量运算部10A输出的主喷射量信号QM输入到输入有控制信号CS的喷射器驱动部10B中。
喷射器驱动部10B响应主喷射量信号QM而进行主喷射控制，用于在所需的主燃料喷射时机从喷射器6～9向对应的气缸喷射由主喷射信号QM决定的主燃料喷射量。喷射器驱动部10B进而响应控制信号CS而进行二次喷射控制，用于在比主燃料喷射时机晚的既定时机从喷射器6～9向对应的气缸喷射由控制信号CS决定的二次燃料喷射量。
接着，参照图3对过滤器控制单元36进行说明。
过滤器控制单元36使用微机而构成，在此执行既定的过滤器控制程序。过滤器控制单元36通过执行该过滤器控制程序，判别是否应该开始用于催化剂31的活性化的燃料喷射动作(二次燃料喷射动作)，并在响应该判别结果而开始二次燃料喷射动作时计算出二次燃料喷射动作开始后的燃料喷射量的累积值，并在该累积值到达既定值时进行停止二次燃料喷射动作的控制。
图3是表示上述过滤器控制程序的流程图。通过将钥匙开关从关闭切换到接通，起动过滤器控制程序，则首先在步骤S11中判别是否需要颗粒过滤器32的再生。在此，根据第1压力信号S1和第2压力信号S2判别颗粒过滤器32的前后压差ΔP是否超过既定水平，在前后压差ΔP超过既定水平的情况下，认为颗粒过滤器32中收集的颗粒的量超过了既定量，需要颗粒过滤器32的再生，步骤S11的判别结果为YES。在前后压差ΔP没有超过既定水平的情况下，步骤S11的判别结果为NO，直到前后压差ΔP超过既定水平之前重复执行步骤S11。另外，在步骤S11进行的再生必要性的判别，除了根据前后压差ΔP外，也可根据适宜的颗粒堆积量推定运算来进行。
若步骤S11的判别结果为YES，则进入步骤S12，在此，判别是否满足二次燃料喷射条件。在本实施例中，根据排气温度信号T判别颗粒过滤器32的排气的输入侧的温度是否进入可望借助二次燃料喷射实现催化剂转换器31的活性化的既定范围内。若颗粒过滤器32的排气的输入侧的温度进入到既定范围内，则步骤S12的判别结果为YES，进入步骤S13。另一方面，若颗粒过滤器32的排气的输入侧的温度在既定范围外，则由于即便通过二次燃料喷射也不能令催化剂转换器31活性化，所以步骤S12的判别结果为NO，回到步骤S11。
即，在颗粒过滤器32的颗粒的堆积量在既定水平以上，催化剂转换器31的动作条件可望借助二次燃料喷射实现活性化的情况下，执行步骤S13以下的步骤。
在步骤13中，根据排气温度信号T计算二次燃料喷射量的目标值并对燃料喷射装置控制单元10通知该目标值，并且执行送出用于指示燃料喷射的开始的控制信号CS的二次燃料喷射的开始处理，进入步骤S14。
在步骤S14中，开始在步骤S13中被指令的二次燃料喷射量的累积计算，在微机的存储器(未图示)内储存该累积值的最新的值。
在接下来的步骤S15中，判别在步骤S14中运算的累积值是否到达既定值If。在运算后的累积值没达到既定值If的情况下，步骤S15的判别结果为NO，进入步骤S16。在步骤S16中，判别颗粒过滤器32的入口侧的温度ta是否到达用于维持颗粒过滤器32的再生所需的再生维持温度tx。
若入口侧温度ta没有到达再生维持温度tx，则步骤S16的判别结果为NO，回到步骤S15。另一方面，若入口侧的温度ta到达再生维持温度tx，则步骤S16的判别结果为YES，进入步骤S17。在步骤S17中，判别入口侧的温度ta是否变为不会令颗粒过滤器32损伤的温度的上限值即过滤器保护温度ty。在入口侧的温度ta没到达过滤器保护温度ty时，步骤S17的判别结果为NO，进入步骤S18。在步骤S18中，决定二次燃料喷射的停止，并输出指令二次燃料喷射的停止的控制信号CS。然后，回到步骤S11。
在步骤S17中，在判别入口侧的温度ta为过滤器保护温度ty的情况下，步骤S17的判别结果为YES，进入步骤S19。在步骤S19中，决定二次燃料喷射的停止，进入返回处理，结束本过滤器控制程序的执行。另外，若在步骤S15判别累积值达到既定值If，则步骤S15的判别结果为YES，进入步骤S19，停止二次燃料喷射，进行返回处理。
这样，若判别累积值到达既定值If，则不管颗粒过滤器32的入口侧的温度条件如何，都停止二次燃料喷射。在判别为累积值到达既定值的情况下，由于催化剂转换器31的活性化不按照预定进行而浪费燃料的可能性高，所以结束二次燃料喷射。
参照图4A至图4D说明该情况。图4A至图4D是用于说明排气后处理装置30的动作的图，横轴都表示时间。图4A是表示催化剂转换器31的入口侧的温度tb随时间变化的图，图4B是表示颗粒过滤器32的入口侧的温度ta随时间变化的图，图4C是表示二次燃料喷射量随时间的变化的图，图4D是表示图4C所示的二次燃料喷射量的累积值随时间的变化的图。
如从图4A至图4D的判断那样，在时间t1柴油机1开始运转，由此温度tb上升，经过时间延迟后温度ta开始上升。
然后，温度ta在时间t2超过既定值，此时步骤S12的判别结果为YES，开始二次燃料喷射。由此，令催化剂转换器31活性化，温度ta急剧上升。
比较图4B和图4D来判断，则累积值达到某一水平后，催化剂转换器31充分地活性化且温度ta的上升饱和。在图4B中，在其饱和状态下，入口侧的温度ta为再生维持温度tx。ty为过滤器保护温度。
这样，在柴油机1的运转环境没有急剧变化的情况下，二次燃料喷射的累积值和温度ta之间成立一定的相关关系。因此，在该情况下以温度ta达到既定值来结束二次燃料喷射即可。但是，在柴油机1的运转环境急剧变化的情况下，借助二次燃料喷射，也不能按照预定较好地促进催化剂31的活性化。因此，在该情况下，只监视温度ta不够，除此之外还同时监视二次燃料喷射量的累积值，并在二次燃料喷射量的累积值到达既定值If的情况下不管温度ta的值如何而结束二次燃料喷射。由此，强制地结束催化剂转换器31的活性化的效果小的二次燃料喷射。另外，即便在步骤S15中判别累积值没有到达既定值If的情况下，在入口侧的温度ta为再生维持温度tx，并且未到达过滤器保护温度ty的情况下，停止二次燃料喷射。
由于排气后处理装置30如上所述地构成，所以这样一来，监视二次燃料喷射的累积值，并在使用了催化剂转换器31的活性化所需的预定量的燃料时强制地结束二次燃料喷射，所以可有效地防止燃料的浪费，可有效地抑制燃料的降低。此外，由于可有效地抑制对催化剂转换器31的促进没有大的贡献的燃料排出到大气中，所以具有防止环境污染的效果。进而，由于二次燃料喷射不会过剩，所以，有助于对燃油的稀释化的问题的改善。
根据本发明，可适当地进行用于催化剂的活性化的燃料喷射动作的控制，有益于排气后处理装置的改善。

Claims (11)

1.一种排气后处理装置，具有：令内燃机的排气中含有的碳化氢氧化、燃烧的催化剂转换器；用于接受通过该催化剂转换器后的排气并收集排气中的颗粒的颗粒过滤器；用于喷射供给用于上述催化剂转换器的活性化的燃料的燃料喷射部件；用于控制该燃料喷射部件的燃料喷射动作的控制部，其特征在于，
上述控制部具有：
用于判别是否应该令用于上述催化剂转换器的活性化的燃料喷射动作开始的判别部；
响应该判别部而在开始上述燃料喷射动作时，计算出上述燃料喷射动作的开始后的燃料喷射量的累积值的计算部；
响应上述计算部而在上述累积值到达既定值时，令上述燃料喷射动作停止的喷射动作停止部。
2.如权利要求1所述的排气后处理装置，其特征在于，上述判别部含有对是否需要上述颗粒过滤器的再生进行判别的机构。
3.如权利要求2所述的排气后处理装置，其特征在于，上述判别部还含有对是否满足二次燃料喷射条件进行判别的机构。
4.如权利要求1或2所述的排气后处理装置，其特征在于，根据上述颗粒过滤器的前后压差，来判别是否需要上述颗粒过滤器的再生。
5.如权利要求3所述的排气后处理装置，其特征在于，根据排气温度，进行是否满足上述二次燃料喷射条件的判别。
6.如权利要求1所述的排气后处理装置，其特征在于，上述控制部还具有以下机构：响应上述计算部而在上述累积值未到达既定值的情况下，在上述颗粒过滤器的入口侧的温度到达再生维持温度时令上述燃料喷射动作停止。
7.如权利要求6所述的排气后处理装置，其特征在于，上述控制部还具有以下机构：响应上述计算部并在上述累积值未到达既定值的情况下，在上述颗粒过滤器的入口侧的温度超过过滤器保护温度时令上述燃烧喷射动作停止。
8.如权利要求6所述的排气后处理装置，其特征在于，上述判别部含有对是否需要上述颗粒过滤器的再生进行判别的机构。
9.如权利要求8所述的排气后处理装置，其特征在于，上述判别部还具有对是否满足二次燃料喷射条件进行判别的机构。
10.如权利要求8或9所述的排气后处理装置，其特征在于，根据上述颗粒过滤器的前后压差，判别是否需要上述颗粒过滤器的再生。
11.如权利要求9所述的排气后处理装置，其特征在于，根据排气温度，进行是否满足上述二次燃料喷射条件的判别。
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CN105026717A (zh) * 2013-02-28 2015-11-04 五十铃自动车株式会社 内燃机的排气净化装置
CN105026717B (zh) * 2013-02-28 2017-12-19 五十铃自动车株式会社 内燃机的排气净化装置

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US20080307777A1 (en) 2008-12-18
CN100449132C (zh) 2009-01-07
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US7634906B2 (en) 2009-12-22
EP1760283A4 (en) 2010-07-07
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