CN101542082B - 内燃机的排气净化装置 - Google Patents

内燃机的排气净化装置 Download PDF

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CN101542082B
CN101542082B CN200880000435.9A CN200880000435A CN101542082B CN 101542082 B CN101542082 B CN 101542082B CN 200880000435 A CN200880000435 A CN 200880000435A CN 101542082 B CN101542082 B CN 101542082B
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catalyzer
main
exhaust
capture
combustion engine
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CN101542082A (zh
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辻本健一
广田信也
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Toyota Motor Corp
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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    • F02D41/027—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
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Abstract

本发明在内燃机中的内燃机排气通路内配置有能够捕获排气中所含有的SOx的主SOx捕集催化剂(11)，主SOx捕集催化剂(11)下游的排气通路被分支成主排气通路(13)和对主排气通路(13)迂回的旁通通路(14)。在主排气通路(13)内配置有NOx吸藏催化剂(15)，同时在NOx吸藏催化剂(15)上游的主排气通路(13)内配置有辅助SOx捕集催化剂(16)。通常使排气在主排气通路(13)内流通，在应该对主SOx捕集催化剂(11)进行再生时，使排气在旁通通路(14)内流通。

Description

内燃机的排气净化装置
技术领域
本发明涉及内燃机的排气净化装置。
背景技术
众所周知在内燃机排气通路内配置了NOx吸藏催化剂的内燃机，所述NOx吸藏催化剂在流入的排气(废气)的空燃比稀薄时吸藏排气中所含有的NOx，当流入的排气的空燃比变为理论空燃比或浓时放出所吸藏的NOx。在该内燃机中，在稀薄空燃比下进行燃烧时发生的NOx被NOx吸藏催化剂吸藏。另一方面，当NOx吸藏催化剂的吸藏NOx能力接近于饱和时，排气的空燃比达到浓，由此NOx从NOx吸藏催化剂中放出并被还原。
然而，燃料和润滑油内含有硫，因此在排气中含有SOx。该SOx与NOx一起被NOx吸藏催化剂吸藏。但是，该SOx在排气的空燃比单单为浓时并不从NOx吸藏催化剂中放出，因此被NOx吸藏催化剂吸藏的SOx的量逐渐增大。其结果能够吸藏的NOx量逐渐减少。
因此，众所周知为了阻止SOx被送入NOx吸藏催化剂中，而在NOx吸藏催化剂上游的内燃机排气通路内配置了SOx吸收剂的内燃机(参照日本特开2000-179327号公报)。对于该内燃机而言，排气中所含有的Sox被SOx吸收剂吸收，这样一来就可阻止SOx流入NOx吸藏催化剂中。其结果，能够通过SOx的吸藏来阻止NOx的吸藏能力降低。
然而，在使用这样的SOx吸收剂的场合，当SOx吸收剂的吸收SOx能力饱和时，SOx就流入NOx吸藏催化剂中，可是，对于该SOx吸收剂而言，当使SOx吸收剂的温度上升并且使流入到SOx吸收剂中的排气的空燃比为浓时，能够使所吸收的SOx从SOx吸收剂放出，这样一来就能够再生SOx吸收剂。然而，当这样地从SOx吸收剂中放出SOx时，所放出的SOx被NOx吸藏催化剂吸藏。因此，该内燃机具有对NOx吸藏催化剂迂回的旁通通路，在使SOx从SOx吸收剂中放出时，使所放出的SOx通过旁通通路排出到大气中。
然而，即使这样地在SOx吸收剂再生时使从SOx吸收剂放出的SOx通过旁通通路排出到大气中，实际上仍有一部分SOx泄漏，流入到NOx吸藏催化剂内。其结果，存在被NOx吸藏催化剂吸藏的SOx量逐渐增大的问题。
发明内容
本发明的目的在于，提供能够阻止SOx流入NOx吸藏催化剂内的内燃机的排气净化装置。
根据本发明，提供一种内燃机的排气净化装置，其在内燃机排气通路内配置能够捕获在排气中所含有的SOx的主SOx捕集催化剂，将主SOx捕集催化剂下游的排气通路分支成主排气通路和对主排气通路迂回的旁通通路，在主排气通路内配置在流入的排气的空燃比为稀薄时吸藏排气中所含有的NOx、在流入的排气的空燃比变为理论空燃比或浓时放出所吸藏的NOx的NOx吸藏催化剂，同时在NOx吸藏催化剂上游的主排气通路内配置辅助SOx捕集催化剂，通常使排气在主排气通路内流通，在应该对主SOx捕集催化剂进行再生时使排气在旁通通路内流通。
在本发明中，在为了再生SOx捕集催化剂而使排气在旁通通路内流通时，即使从主SOx捕集催化剂放出的SOx泄漏到主排气通路内，该泄漏的SOx也被辅助捕集催化剂捕获，这样就能够阻止SOx流入到NOx吸藏催化剂内。
附图说明
图1是压缩点火式内燃机的整体图；图2是NOx吸藏催化剂的催化剂载体的表面部分的剖面图；图3是SOx捕集催化剂的基体表面部分的剖面图；图4是表示吸藏SOx量∑SOX与应该进行升温控制的吸藏SOx量SO(n)的关系等的图；图5是表示吸藏SOx量∑SOX等的变化的时间图；图6是用于进行排气净化控制的流程图；图7是表示压缩点火式内燃机的另一实施例的整体图；图8是表示压缩点火式内燃机的又一实施例的整体图。
具体实施方式
图1表示压缩点火式内燃机的整体图。
参照图1，其中的标号分别表示如下：1-内燃机主体、2-各气缸的燃烧室、3-用于向各燃烧室2内分别喷射燃料的电子控制式燃料喷射阀、4-吸气岐管、5-排气岐管。吸气岐管4通过吸气导管6与排气涡轮增压器7的压缩机7a的出口连接，压缩机7a的入口与空气滤清器8连接。在吸气导管6内配置有由步进电动机驱动的节气门9，而且在吸气导管6周围配置有用于冷却在吸气导管6内流动的吸入空气的冷却装置10。图1所示的实施例中，内燃机冷却水被导入到冷却装置10内，吸入空气由内燃机冷却水冷却。
另一方面，排气岐管5与排气涡轮增压器7的排气涡轮7b的入口连接，排气涡轮7b的出口与主SOx捕集催化剂11的入口连接。在SOx捕集催化剂11的出口连接有排气管12，该排气管12内的排气通路分支成主排气通路13和对该主排气通路13迂回的旁通通路14。在主排气通路13内配置有NOx吸藏催化剂15，并且在该NOx吸藏催化剂15上游的主排气通路13内配置有辅助SOx捕集催化剂16。
如图1所示，在NOx吸藏催化剂15下游的主排气通路13内配置有通过促动器(actuator)17进行开闭控制的第1排气控制阀18，在旁通通路14内配置有通过促动器19进行开闭控制的第2排气控制阀20。通常，如图1所示，使第1排气控制阀18全开的同时，使第2排气控制阀20全闭，因此通常排气在主排气通路13内流通。另外，在排气岐管5上安装有用于向在排气岐管5内流动的排气中供给例如含有烃的还原剂的还原剂供给阀21。
排气岐管5和吸气岐管4通过排气再循环(以下称为EGR)通路22互相连接，在EGR通路22内配置有电子控制式EGR控制阀23。另外，在EGR通路22周围配置有用于冷却在EGR通路22内流动的EGR气体的冷却装置24。图1所示的实施例中，内燃机冷却水被导入到冷却装置24内，EGR气体被内燃机冷却水冷却。另一方面，各燃料喷射阀3通过燃料供给管25与共轨(Common Rail)26连接。由电子控制式的喷出量可变的燃料泵27向该共轨26内供给燃料，供给到共轨26内的燃料经由各燃料供给管25供给至燃料喷射阀3。
电子控制单元30包括数字计算机，具备利用双向性总线31相互连接的ROM(只读存储器)32、RAM(随机存储器)33、CPU(微处理器)34、输入端口35和输出端口36。如图1所示，在油门踏板40上连接有发生与油门踏板40的踏进量成比例的输出电压的负荷传感器41，负荷传感器41的输出电压通过相对应的AD转换器输入至输入端口35。此外，在输入端口35上连接有每当曲轴旋转例如15°就发生输出脉冲的曲轴转角传感器42。另一方面，输出端口36通过相对应的驱动电路38与燃料喷射阀3、节气门9的驱动用步进电动机、用于分别驱动第1排气控制阀18和第2排气控制阀20的促动器17、18、还原剂供给阀21、EGR控制阀23和燃料泵27连接。
首先，对图1所示的NOx吸藏催化剂15进行说明。该NOx吸藏催化剂15具有例如包含氧化铝的催化剂载体，图2图解示出该催化剂载体45的表面部分的剖面。如图2所示，在该催化剂载体45的表面上分散地担载有贵金属催化剂46，而且在催化剂载体45的表面上形成有NOx吸收剂47的层。
在本发明的实施例中，作为贵金属催化剂46可使用铂(Pt)，作为构成NOx吸收剂47的成分，可使用例如选自钾(K)、钠(Na)、铯(Cs)之类的碱金属、钡(Ba)、钙(Ca)之类的碱土类、镧(Ca)、钇(Y)之类的稀土类中的至少一种。
当将供给到内燃机吸气通路、燃烧室2和NOx吸藏催化剂15上游的排气通路内的空气与燃料(烃)的比称为排气的空燃比时，NOx吸收剂47发挥在排气的空燃比为稀薄时吸收NOx，当排气中的氧浓度降低时放出所吸收的NOx的吸收放出NOx的作用。
即，以使用钡(Ba)作为构成NOx吸收剂47的成分的情况为例进行说明。在排气的空燃比为稀薄时，即排气中的氧浓度高时，排气中含有的NO如图2所示在铂(Pt)46上被氧化变成NO2，接着被吸收到NOx吸收剂47内，一边与氧化钡(BaO)结合一边以硝酸离子(NO3 -)的形式扩散到NOx吸收剂47内。这样NOx就被吸收到NOx吸收剂47内。只要排气中的氧浓度高，就可在铂(Pt)46的表面生成NO2，只要NOx吸收剂47的吸收NOx能力不饱和，NO2就被吸收到NOx吸收剂47内生成硝酸离子(NO3 -)。
与此相对，当通过由还原剂供给阀21供给还原剂而使排气的空燃比为浓或理论空燃比时，排气中的氧浓度降低，因此反应向反向(NO3 -→NO2)地进行，这样NOx吸收剂47内的硝酸离子(NO3 -)就以NO2的形式从NOx吸收剂47中放出。接着，所放出的NOx被排气中含有的未燃HC、CO还原。
这样，排气的空燃比为稀薄时，即在稀薄空燃比下进行燃烧时，排气中的NOx被吸收到NOx吸收剂47内，然而，在稀薄空燃比下的燃烧继续进行时，在该期间NOx吸收剂47的吸收NOx能力饱和，这样就不能够利用NOx吸收剂47吸收NOx。因此，在本发明的实施例中，在NOx吸收剂47的吸收能力饱和之前通过由还原剂供给阀21供给还原剂而使排气的空燃比暂时为浓，由此使NOx从NOx吸收剂47中放出。
具体地讲，在本发明的实施例中，NOx吸藏催化剂15每单位时间所吸藏的NOx量NOXA，作为要求扭矩TQ和内燃机旋转数N的函数，以图4(A)所示的图的形式预先存储在ROM 32内，通过累计该NOx量NOXA就可算出被NOx吸藏催化剂15吸藏的NOx量∑NOX。在本发明的实施例中，如图5所示，每当该NOx量∑NOX达到容许值NX时，就使流入到NOx吸藏催化剂15中的排气的空燃比A/F暂地为浓，由此NOx从NOx吸藏催化剂15中放出。
然而，在排气中含有SOx即SO2，该SO2流入到NOx吸藏催化剂15中时，该SO2在铂Pt 46上被氧化变成SO3。接着，该SO3被吸收到NOx吸收剂47内，一边与氧化钡(BaO)结合，一边以硫酸离子(SO4 2-)的形式扩散到NOx吸收剂47内，生成稳定的硫酸盐BaSO4。然而，NOx吸收剂47具有强的碱性，因此该硫酸盐BaSO4难以稳定地分解，当使排气的空燃比只为浓时，硫酸盐BaSO4不分解而原样地残留下来。因此，在NOx吸收剂47内随着时间的经过硫酸盐BaSO4增多，这样一来，随着时间的经过NOx吸收剂47可吸收的NOx量降低。
因此，在本发明中，在NOx吸藏催化剂15的上游配置主SOx捕集催化剂11，利用该主SOx捕集催化剂11捕获排气中含有的SOx，由此使SOx不流入NOx吸藏催化剂15中。接着对该主SOx捕集催化剂11进行说明。
该主SOx捕集催化剂11例如包含蜂窝结构的整体催化剂，具有在主SOx捕集催化剂11的轴线方向笔直地延伸的多个排气流通孔。图3图解示出该主SOx捕集催化剂11的基体50的表面部分的剖面。如图3所示，在催化剂载体50的表面上形成有涂层51，在该涂层51的表面上分散保持有贵金属催化剂52。
在本发明的实施例中，作为贵金属催化剂52可使用铂，作为构成涂层51的成分可使用例如选自钾(K)、钠(Na)、铯(Cs)之类的碱金属、钡(Ba)、钙(Ca)之类的碱土类、镧(La)、钇(Y)之类的稀土类中的至少一种。即，主SOx捕集催化剂11的涂层51呈强碱性。
再者，排气中含有的SOx即SO2如图3所示在铂Pt 52上被氧化，接着被捕获到涂层51内。即SO2以硫酸离子(SO4 2-)的形式扩散到涂层51内，形成硫酸盐。再者，如上所述涂层51呈强碱性，因此如图3所示排气中含有的SO2的一部分直接被捕获到涂层51内。
图3中，涂层51内的浓淡表示被捕获的SOx的浓度。由图3可知，涂层51内的SOx浓度，在涂层51的表面附近最高，随着向内部深入逐渐变低。涂层51的表面附近的SOx浓度增高时，涂层51的表面的碱性减弱，SOx的捕获能力减弱。在此，将排气中含有的SOx之中被主SOx捕集催化剂11捕获的SOx的比例称为SOx捕集率时，若涂层51的表面的碱性减弱则与之相伴SOx捕集率会降低。在本发明的实施例中，在SOx捕集率低于预先设定的捕集率时，在排气的空燃比为稀薄的状态下进行使主SOx捕集催化剂11的温度上升的升温控制，由此使SOx捕集率恢复。
即，当在排气的空燃比为稀薄的状态下使主SOx捕集催化剂11的温度上升时，集中地存在于涂层51内的表面附近的SOx向涂层51的内部扩散使得涂层51内的SOx浓度变得均匀。即，在涂层51内生成的硝酸盐由集中在涂层51的表面附近的不稳定的状态，变成遍及涂层51内整体均匀分散的稳定的状态。当存在于涂层51内的表面附近的SOx向涂层51的内部扩散时，涂层51的表面附近的SOx浓度降低，这样一来当主SOx捕集催化剂11的升温控制完成时SOx捕集率就得到恢复。
在进行主SOx捕集催化剂11的升温控制时，若使主SOx捕集催化剂11的温度大致为450℃左右，则能够使存在于涂层51的表面附近的SOx扩散到涂层51内，若使主SOx捕集催化剂11的温度上升到600℃左右，则能够使涂层51内的SOx浓度相当地均匀化。因此，在进行主SOx捕集催化剂11的升温控制时，优选在排气的空燃比为稀薄的状态下使主SOx捕集催化剂11的温度升温到600℃左右。
以下对该主SOx捕集催化剂11升温控制的一个实施例进行具体说明。
在该实施例中，推定被主SOx捕集催化剂11捕获的SOx量，在被主SOx捕集催化剂11捕获的SOx量超过预先设定的量时，判断为SOx捕集率比预先设定的捕集率低，此时为了恢复SOx捕采率，在排气的空燃比为稀薄的状态下进行使主SOx捕集催化剂11的温度上升的升温控制。
即，在燃料中以某个比例含有硫，因此排气中含有的SOx量，即被主SOx捕集催化剂11捕获的SOx量与燃料喷射量成比例。燃料喷射量是要求扭矩和内燃机旋转数的函数，因此被主SOx捕集催化剂11捕获的SOx量也成为要求扭矩和内燃机旋转数的系数。在该实施例中，主SOx捕集催化剂11每单位时间捕获的SOx量SOXA，作为要求扭矩TQ和内燃机旋转数N的函数以图4(B)所示的图的形式存储在ROM 32内。
另外，该实施例中，如图4(C)所示预先存储了SOx量∑SOX与应该对主SOx捕集催化剂11进行升温处理时的预先设定的SOx量SO(n)的关系，SOx量∑SOX超过预先设定的SO(n)(n＝1，2，3，…)时，进行主SOx捕集催化剂11的升温处理。再者，在图4(C)中n表示是第几次的升温处理。由图4(C)可知，随着用于恢复SOx捕集率的升温处理次数n增大，预先设定的量SO(n)增大，处理次数n越增大，该预先设定的量SO(n)的增大比例越减小。即，SO(3)相对于SO(2)的增大比例，比SO(2)相对于SO(1)的增大比例减少。
即，如图5所示，在该实施例中，当SOx量∑SOX达到SO(n)时，使主SOx捕集催化剂11的温度T上升到600℃左右，在排气的空燃比为稀薄的状态下维持在600℃左右。再者，该实施例中，在升温控制时由烃供给阀21供给烃，主SOx捕集催化剂11的温度通过该烃的氧化反应热而上升。
另一方面，这样地使主SOx捕集催化剂11升温时，若使排气的空燃比为浓，则SOx从主SOx捕集催化剂11中放出。因此在该实施例中，在升温控制时使排气的空燃比维持为稀薄。但是，当涂层51的表面附近的SOx浓度变高时，即使将排气的空燃比维持为稀薄，在主SOx捕集催化剂11的温度上升时SOx也会从主SOx捕集催化剂11放出。所以此时关闭第1排气控制阀18，同时打开第2排气控制阀20使得SOx不流入NOx吸藏催化剂15中。即，如图5所示，在进行主SOx捕集催化剂11的升温控制时，排气通路由主排气通路13切换成旁通通路14。
然而，即使关闭第1排气制阀18，实际上排气也从第1排气控制阀13的周围通过从而泄漏。因此即使关闭第1排气控制阀18的同时，打开第2排气控制阀20，也仍有少量的排气在主排气通路13内流动，这样一来从主SOx捕集催化剂11排出的SOx就流入到NOx吸藏催化剂15内。
于是，在本发明中，为了阻止SOx流入到NOx吸藏催化剂15内，如图1所示，在NOx吸藏催化剂15上游的主排气通路13内配置了辅助SOx捕集催化剂16。该辅助SOx捕集催化剂16具有与主SOx捕集催化剂11同样的结构，即使是该辅助SOx捕集催化剂16，也如图3所示，在催化剂载体50的表面上形成有涂层51，在该涂层51的表面上分散担载有贵金属催化剂52。
此外，即使是该辅助SOx捕集催化剂16，作为贵金属催化剂52也可使用铂，作为构成涂层51的成分也可以使用例如选自钾(K)、钠(Na)、铯(Cs)之类的碱金属、钡(Ba)、钙(Ca)之类的碱土类、镧(La)、钇(Y)之类的稀土类中的至少一种。
再者，该辅助SOx捕集催化剂16，不象主SOx捕集催化剂11那样进行再生，使该辅助SOx捕集催化剂16永久地进行捕获SOx的作用。因此在本发明的实施例中，辅助SOx捕集催化剂16的涂层51的碱性强于主SOx捕集催化剂11的涂层51的碱性，因此辅助SOx捕集催化剂16与主SOx捕集催化剂11相比，对SOx的保持力更高一些。
接着，一边参照图6一边对排气净化控制过程进行说明。
参照图6，首先在步骤60中由图4(A)所示的图算出NOx吸藏催化剂15每单位时间吸藏的NOx量NOXA。接着，在步骤61中，该NOXA被累加成被NOx吸藏催化剂15吸藏的NOx量∑NOX。接着，在步骤62中，判断吸藏NOx量∑NOX是否超过了容许值NX。当∑NOX＞NX时就进入步骤63，进行利用由还原剂供给阀21供给的还原剂使流入到NOx吸藏催化剂15中的排气的空燃比暂时从稀薄切换成浓的浓处理，∑NOX被净化。
此时，如图1所示第1排气控制阀18打开，关闭第2排气控制阀20。即，排气在主排气通路13内流通。另外，由图5可知，此时，由于主SOx捕集催化剂11不升温，因此通常不会从主SOx捕集催化剂11排出SOx，即使此时从主SOx捕集催化剂11中放出SOx，该SOx也被捕获到辅助SOx捕集催化剂16内。因此，在控制NOx放出时SOx不会流入到NOx吸藏催化剂15内。
接着，在步骤64中，由图4(B)所示的图算出主SOx捕集催化剂11每单位时间吸藏的SOx量SOXA。接着，在步骤65中，该SOXA与被主SOx捕集催化剂11捕获的SOx量∑SOX相加。接着，在步骤66中，判断SOx量∑SOX是否达到了图4(C)表示的预先设定的量SO(n)(n＝1，2，3，…)。当SOx量∑SOX达到了预先设定的量SO(n)时就进入步骤67，如图5所示排气流路由主排气通路13切换成旁通通路14，接着，在步骤68中，在排气的空燃比为稀薄的状态下进行将主SOx捕集催化剂11的温度维持在600℃左右的再生控制。当再生处理完成时∑SOX被净化，排气流路再此切换成主排气通路13。
另外，在应该再生主SOx捕集催化剂11时也可使排气的空燃比如图5中虚线所示那样为浓。此时，如前所述从主SOx捕集催化剂11中放出大量的SOx，该放出的大量的SOx被送入旁通通路14内。此时SOx流入到主排气通路13内的场合，该流入的SOx也会被辅助SOx捕集催化剂16捕获。
图7表示压缩点火式内燃机的另一实施例。在该实施例中，主SOx捕集催化剂70包括直列(串联)配置的SOx捕集催化剂71和颗粒过滤器72。在该实施例中，在为了再生颗粒过滤器72而在排气的空燃比为稀薄的状态下将颗粒过滤器72升温时，SOx捕集催化剂71也被再生。再者，还能够使颗粒过滤器72上担载NOx吸藏催化剂。
图8表示压缩点火式内燃机的又一实施例。在该实施例中，主SOx捕集催化剂73包含NOx吸藏催化剂，在应该再生该NOx吸藏催化剂73时使NOx吸藏催化剂73的温度上升到600℃以上，同时使流入到NOx吸藏催化剂73中的排气的空燃比为浓。此时，SOx从NOx吸藏催化剂73中放出。
参照符号一览表
4…吸气岐管
5…排气岐管
7…排气涡轮增压器
11…主SOX捕集催化剂
13…主排气通路
14…旁通通路
15…NOX吸藏催化剂
16…辅助SOX捕集催化剂
18，20…排气控制阀
21…还原剂供给阀

Claims (8)

1.一种内燃机的排气净化装置，其在内燃机排气通路内配置能够捕获排气中所含有的SOx的主SOx捕集催化剂，将该主SOx捕集催化剂下游的排气通路分支成主排气通路和对主排气通路迂回的旁通通路，在该主排气通路内配置在流入的排气的空燃比为稀薄时吸藏排气中所含有的NOx、在流入的排气的空燃比变为理论空燃比或浓时放出所吸藏的NOx的NOx吸藏催化剂的同时，在该NOx吸藏催化剂上游的主排气通路内配置辅助SOx捕集催化剂，通常使排气在主排气通路内流通，在应该对主SOx捕集催化剂进行再生时使排气在旁通通路内流通。
2.根据权利要求1所述的内燃机的排气净化装置，其中，辅助SOx捕集催化剂与主SOx捕集催化剂相比，对SOx的保持力更高。
3.根据权利要求1所述的内燃机的排气净化装置，其中，辅助SOx捕集催化剂包含在基体上形成的涂层和维持于涂层上的贵金属催化剂，在涂层内分散含有碱金属、碱土类金属或稀土类金属。
4.根据权利要求1所述的内燃机的排气净化装置，其中，所述主SOx捕集催化剂，具有在排气的空燃比为稀薄的状态下，若主SOx捕集催化剂的温度上升则所捕获的SOx逐渐扩散到主SOx捕集催化剂内部的性质，同时具有当流入到主SOx捕集催化剂中的排气的空燃比变为浓时，如果主SOx捕集催化剂的温度为SOx放出温度以上，则放出所捕获的SOx的性质；在主SOx捕集催化剂的SOx捕集率低于预先设定的捕集率时，主SOx捕集催化剂被再生。
5.根据权利要求4所述的内燃机的排气净化装置，其中，在应该对主SOx捕集催化剂进行再生时，不使流入到主SOx捕集催化剂中的排气的空燃比为浓，而是在维持为稀薄的状态下使主SOx捕集催化剂的温度上升。
6.根据权利要求4所述的内燃机的排气净化装置，其中，在应该对主SOx捕集催化剂进行再生时，使流入到主SOx捕集催化剂中的排气的空燃比为浓。 
7.根据权利要求1所述的内燃机的排气净化装置，其中，主SOx捕集催化剂包含直列配置的SOx捕集催化剂和颗粒过滤器。
8.根据权利要求1所述的内燃机的排气净化装置，其中，主SOx捕集催化剂包含NOx吸藏催化剂。 
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Families Citing this family (8)

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Publication number Priority date Publication date Assignee Title
JP4840274B2 (ja) * 2007-07-11 2011-12-21 トヨタ自動車株式会社 燃料やオイル中の硫黄濃度検出方法
US9482125B2 (en) * 2010-09-14 2016-11-01 GM Global Technology Operations LLC Particulate filter and hydrocarbon adsorber bypass systems
US9238468B2 (en) * 2011-09-20 2016-01-19 General Electric Company Systems and methods for controlling exhaust flow through an aftertreatment device
DE102014201077B4 (de) 2013-03-07 2023-02-09 Ford Global Technologies, Llc Abgasreinigungssystem zur selektiven katalytischen Reduktion
DE102014201390A1 (de) 2014-01-27 2015-07-30 Ford Global Technologies, Llc Abgasnachbehandlungsanordnung
DE202014100382U1 (de) 2014-01-27 2014-02-06 Ford Global Technologies, Llc Abgasnachbehandlungsanordnung
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CN113107644B (zh) * 2021-05-28 2022-03-01 潍柴动力股份有限公司 一种后处理系统及其脱硫装置、控制方法与存储介质

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1206070A (zh) * 1997-07-17 1999-01-27 株式会社日立制作所 内燃机废气净化装置及净化方法
CN1334899A (zh) * 1999-01-25 2002-02-06 丰田自动车株式会社 内燃机的排气净化装置

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2605580B2 (ja) * 1993-06-10 1997-04-30 トヨタ自動車株式会社 内燃機関の排気浄化装置
WO1994012778A1 (en) * 1992-12-03 1994-06-09 Toyota Jidosha Kabushiki Kaisha Exhaust gas cleaning apparatus for internal combustion engines
DE19802631C1 (de) * 1998-01-24 1999-07-22 Daimler Chrysler Ag Verfahren und Einrichtung zum Reinigen von Abgasen eines Verbrennungsmotors
DE19842625C2 (de) * 1998-09-17 2003-03-27 Daimler Chrysler Ag Verfahren zum Betrieb einer Verbrennungsmotoranlage mit schwefelanreichernder Abgasreinigungskomponente und damit betreibbare Verbrennungsmotoranlage
JP3551046B2 (ja) 1998-11-09 2004-08-04 トヨタ自動車株式会社 内燃機関の排気浄化装置
JP3570262B2 (ja) 1998-12-17 2004-09-29 トヨタ自動車株式会社 内燃機関の排気浄化装置
US6348177B1 (en) * 1999-02-10 2002-02-19 Southwest Research Institute Apparatus and method for bypassing sulfur dioxide around an aftertreatment device in an exhaust gas aftertreatment system
JP2000297631A (ja) * 1999-04-09 2000-10-24 Toyota Motor Corp 内燃機関の排気浄化装置
FR2819549B1 (fr) 2001-01-12 2003-05-23 Renault Systeme de traitement des gaz d'echappement d'un moteur a combustion
WO2003031780A1 (en) * 2001-10-11 2003-04-17 Southwest Research Institute Systems and method for controlling diesel engine emissions
US7117667B2 (en) * 2002-07-11 2006-10-10 Fleetguard, Inc. NOx adsorber aftertreatment system for internal combustion engines
JP2004339993A (ja) * 2003-05-14 2004-12-02 Toyota Motor Corp 内燃機関の排気浄化システム
JP3938136B2 (ja) * 2003-10-29 2007-06-27 トヨタ自動車株式会社 圧縮着火式内燃機関の排気浄化装置
US7249455B2 (en) * 2003-12-23 2007-07-31 Arvin Technologies, Inc. Method and apparatus for regenerating a nitrogen oxides absorber
JP4413020B2 (ja) * 2004-01-21 2010-02-10 ヤンマー株式会社 排気ガス浄化装置及びその制御方法
US7900441B2 (en) * 2004-02-12 2011-03-08 Fleetguard, Inc. Precat-NOx adsorber exhaust aftertreatment system for internal combustion engines

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1206070A (zh) * 1997-07-17 1999-01-27 株式会社日立制作所 内燃机废气净化装置及净化方法
CN1334899A (zh) * 1999-01-25 2002-02-06 丰田自动车株式会社 内燃机的排气净化装置

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
JP特开2000-297631A 2000.10.24
JP特开平11-280456A 1999.10.12
JP特开平6-346768A 1994.12.20

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