公开(公告)号：WO2014184635A1

公开(公告)日：2014-11-20

申请号：PCT/IB2014/000718

申请日：2014-05-12

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA ,  SHIBATA, Hidetaka ,  MATSUSHITA, Tomohiko ,  NAKANO, Yasuaki

Inventor： SHIBATA, Hidetaka ,  MATSUSHITA, Tomohiko ,  NAKANO, Yasuaki

IPC: F01N3/10 ,  F01N9/00 ,  F01N3/025

CPC classification number: F01N3/0253 ,  F01N3/103 ,  F01N9/00 ,  F01N2570/04 ,  F01N2900/1612 ,  Y02T10/47

Abstract: A reduction process is executed when a catalyst bed temperature is lower than a target temperature of the catalyst bed temperature in a burn-off process. When an execution condition for the burn-off process is satisfied, the reduction process is executed, and execution of the burn-off process is prohibited until an accumulation amount of sulfur oxide in the oxidation catalyst becomes equal to or less than an allowable amount through the execution of the reduction process.

Abstract translation: 当催化剂床温度低于燃烧过程中的催化剂床温度的目标温度时，执行还原处理。 当满足燃烧过程的执行条件时，执行缩小处理，并且禁止执行燃烧过程，直到氧化催化剂中的硫氧化物的累积量变得等于或小于允许量通过 执行还原过程。

公开(公告)号：WO2008029263A2

公开(公告)日：2008-03-13

申请号：PCT/IB2007/002571

申请日：2007-09-06

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA ,  YOSHIDA, Kohei ,  NAKANO, Yasuaki ,  WATANABE, Tadashi ,  HAYASHI, Kotaro ,  ASANUMA, Takamitsu

Inventor： YOSHIDA, Kohei ,  NAKANO, Yasuaki ,  WATANABE, Tadashi ,  HAYASHI, Kotaro ,  ASANUMA, Takamitsu

IPC: F01N3/08 ,  B01D53/94

CPC classification number: B01D53/9422 ,  B01D53/9477 ,  B01D2255/1021 ,  B01D2255/1023 ,  F01N3/0807 ,  F01N3/0814 ,  F01N3/0821 ,  F01N13/009 ,  F01N13/0093 ,  Y02C20/10

Abstract: A fuel addition valve (14) that adds fuel into the exhaust gas passage of the engine in the form of fine fuel droplets, an upstream NOx adsorption-reduction catalyst (12), and a downstream NOx adsorption-reduction catalyst (13) are arranged in this order. Platinum Pt and palladium Pd, as noble metal, are supported on the downstream NOx adsorption-reduction NOx catalyst (13) such that the ratio of the mole number of the platinum Pt to the sum of the mole numbers of the platinum Pt and the palladium Pd is approx. 50% to approx. 80%. Only platinum Pt is supported on the upstream NOx adsorption-reduction catalyst (12). According to this structure, even when liquid fuel is supplied into exhaust gas, NOx can be effectively released from the NOx adsorption-reduction catalyst, and further the amount of NOx that the NOx adsorption-reduction catalyst can adsorb at a low temperature increases.

Abstract translation: 一种燃料添加阀（14），其将燃料添加到发动机的细小燃料液滴的形式的排气通道中，上游的NOx吸附还原催化剂（12）和下游的NOx吸附还原催化剂（13） 按此顺序 作为贵金属的铂Pt和钯Pd负载在下游NOx吸附还原NOx催化剂（13）上，使得铂Pt的摩尔数与铂Pt和钯的摩尔数之和的比率 钯约为 50％〜约 80％。 在上游NOx吸附还原催化剂（12）上仅负载铂Pt。 根据该结构，即使向排气供给液体燃料，也可以从NOx吸附还原催化剂中有效地释放NOx，并且进一步降低NOx吸附还原催化剂在低温下吸附的NOx量。

公开(公告)号：WO2006098526A1

公开(公告)日：2006-09-21

申请号：PCT/JP2006/306062

申请日：2006-03-20

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA ,  NAKANO, Yasuaki

Inventor： NAKANO, Yasuaki

IPC: F02D41/02 ,  B01D53/94 ,  F01N11/00 ,  F01N3/08 ,  F01N3/20

CPC classification number: F01N9/00 ,  B01D53/9431 ,  B01D53/9495 ,  F01N3/0842 ,  F01N3/0871 ,  F01N11/00 ,  F01N2550/03 ,  F01N2610/03 ,  F02D41/0275 ,  F02D2200/0811 ,  Y02T10/47

Abstract: An object of the present invention is to perform removal of NOx in an exhaust gas purification system for an internal combustion engine equipped with an NOx catalyst while suppressing the consumption amount of reducing agent used for NOx removal even when the NOx catalyst is deteriorated. To achieve the object, when the degree of deterioration of the NOx catalyst is lower than or equal to a specific deterioration degree, the air-fuel ratio of the exhaust gas flowing into the NOx catalyst is adjusted to the stoichiometric air-fuel ratio or a rich air-fuel ratio. On the other hand, when it is determined that the degree of deterioration of the NOx catalyst is higher than the specific deterioration degree, the air-fuel ratio of the exhaust gas flowing into the NOx catalyst is adjusted to a specific lean air-fuel ratio.

Abstract translation: 本发明的目的在于，即使在NOx催化剂劣化的同时，也能够抑制用于NOx除去的还原剂的消耗量，在配备有NOx催化剂的内燃机的排气净化系统中除去NOx。 为了达到上述目的，当NOx催化剂的劣化程度低于或等于特定的劣化程度时，流入NOx催化剂的废气的空燃比被调节到理论空燃比或者 丰富的空燃比。 另一方面，当确定NOx催化剂的劣化程度高于特定的劣化程度时，流入NOx催化剂的排气的空燃比被调节到特定的稀空燃比 。

公开(公告)号：WO2006064894A1

公开(公告)日：2006-06-22

申请号：PCT/JP2005/023099

申请日：2005-12-09

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA ,  YOSHIDA, Kohei ,  HIROTA, Shinya ,  NAKANO, Yasuaki

Inventor： YOSHIDA, Kohei ,  HIROTA, Shinya ,  NAKANO, Yasuaki

IPC: F01N3/08 ,  F01N3/20

CPC classification number: F01N3/085 ,  F01N3/0814 ,  F01N3/0871 ,  F01N3/206 ,  F01N13/009 ,  F01N13/0093 ,  F01N13/0097

Abstract: The invention provides a technology that enables to prevent sulfur components contained in reducing agent added from flowing into an NOx catalyst thereby keeping a high NOx removing rate. An S-trapping catalyst 11 for trapping sulfur components contained in exhaust gas discharged from an internal combustion engine 1, an S-trapping catalyst 12 for trapping sulfur components contained in reducing agent added to the exhaust gas from which sulfur components have been trapped by the S-trapping catalyst 11 are provided, thereby preventing an NOx catalyst 14 from being poisoned by sulfur.

Abstract translation: 本发明提供一种技术，其能够防止添加的还原剂中所含的硫成分流入NOx催化剂，从而保持高NOx去除率。 用于捕集从内燃机1排出的废气中所含的硫成分的S捕获催化剂11，用于捕集添加到已经被硫成分捕获的废气中的还原剂中所含的硫成分的S捕获催化剂12 提供了S捕获催化剂11，从而防止NOx催化剂14被硫中毒。

公开(公告)号：WO2008029263A3

公开(公告)日：2008-05-22

申请号：PCT/IB2007002571

申请日：2007-09-06

Applicant: TOYOTA MOTOR CO LTD ,  YOSHIDA KOHEI ,  NAKANO YASUAKI ,  WATANABE TADASHI ,  HAYASHI KOTARO ,  ASANUMA TAKAMITSU

Inventor： YOSHIDA KOHEI ,  NAKANO YASUAKI ,  WATANABE TADASHI ,  HAYASHI KOTARO ,  ASANUMA TAKAMITSU

IPC: F01N3/08 ,  B01D53/94 ,  F01N3/02 ,  F01N3/023 ,  F01N3/025 ,  F01N3/029 ,  F01N3/035 ,  F01N3/10 ,  F01N3/28 ,  F01N13/02

CPC classification number: B01D53/9422 ,  B01D53/9477 ,  B01D2255/1021 ,  B01D2255/1023 ,  F01N3/0807 ,  F01N3/0814 ,  F01N3/0821 ,  F01N13/009 ,  F01N13/0093 ,  Y02C20/10

Abstract: A fuel addition valve (14) that adds fuel into the exhaust gas passage of the engine in the form of fine fuel droplets, an upstream NOx adsorption-reduction catalyst (12), and a downstream NOx adsorption-reduction catalyst (13) are arranged in this order. Platinum Pt and palladium Pd, as noble metal, are supported on the downstream NOx adsorption-reduction NOx catalyst (13) such that the ratio of the mole number of the platinum Pt to the sum of the mole numbers of the platinum Pt and the palladium Pd is approx. 50% to approx. 80%. Only platinum Pt is supported on the upstream NOx adsorption-reduction catalyst (12). According to this structure, even when liquid fuel is supplied into exhaust gas, NOx can be effectively released from the NOx adsorption-reduction catalyst, and further the amount of NOx that the NOx adsorption-reduction catalyst can adsorb at a low temperature increases.

Abstract translation: 一种燃料添加阀（14），其将燃料添加到发动机的细小燃料液滴的形式的排气通道中，上游的NOx吸附还原催化剂（12）和下游的NOx吸附还原催化剂（13） 按此顺序 作为贵金属的铂Pt和钯Pd负载在下游NOx吸附还原NOx催化剂（13）上，使得铂Pt的摩尔数与铂Pt和钯的摩尔数之和的比率 钯约为 50％〜约 80％。 在上游NOx吸附还原催化剂（12）上仅负载铂Pt。 根据该结构，即使向排气供给液体燃料，也可以从NOx吸附还原催化剂中有效地释放NOx，并且进一步降低NOx吸附还原催化剂在低温下吸附的NOx量。

公开(公告)号：WO2007142368A1

公开(公告)日：2007-12-13

申请号：PCT/JP2007/062187

申请日：2007-06-11

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA ,  AOYAMA, Taro ,  NAKANO, Yasuaki

Inventor： AOYAMA, Taro ,  NAKANO, Yasuaki

IPC: F01N3/20 ,  F01N3/08

CPC classification number: F01N3/206 ,  F01N3/0842 ,  F01N3/0871 ,  F01N11/002 ,  F01N2550/03 ,  Y02T10/47

Abstract: There is provided a technique which can reduce the NOx stored in an NOx storage reduction catalyst (3). In case where concentrated reduction is carried out so as to add a reducing agent to the NOx storage reduction catalyst in a concentrated manner when a shift has been made from a state in which reduction of the NOx stored in said NOx storage reduction catalyst is unable to be performed in spite of a request for reduction of the NOx into a state in which reduction of the NOx is able to be performed, the level of concentration upon addition of the reducing agent is changed based on the amount of the NOx stored in the NOx storage reduction catalyst and the temperature of the NOx storage reduction catalyst.

Abstract translation: 提供了可以减少存储在NOx储存还原催化剂（3）中的NOx的技术。 在从NOx储存还原催化剂中储存的NOx的减少不能进行变换的情况下，进行浓缩还原的方式以浓缩方式向还原催化剂添加还原剂的情况 尽管要求将NOx还原成能够进行NOx的还原的状态，但是还原剂的添加浓度基于存储在NOx中的NOx的量而改变 储存还原催化剂和NOx储存还原催化剂的温度。

公开(公告)号：WO2005040571A1

公开(公告)日：2005-05-06

申请号：PCT/JP2004/015954

申请日：2004-10-21

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA ,  YOSHIDA, Kohei ,  HIROTA, Shinya ,  NAKANO, Yasuaki

Inventor： YOSHIDA, Kohei ,  HIROTA, Shinya ,  NAKANO, Yasuaki

IPC: F01N3/08

CPC classification number: B01D53/9431 ,  B01D2257/302 ,  B01D2257/404 ,  F01N3/0821 ,  F01N3/0842 ,  F01N3/085 ,  F01N3/2006 ,  F01N13/009 ,  F01N2240/18 ,  F01N2560/02 ,  F01N2570/04 ,  F01N2570/14 ,  F01N2610/03 ,  F02B37/00 ,  F02D41/0245 ,  F02D41/0285 ,  F02D41/402 ,  F02M26/05 ,  F02M26/22 ,  F02M26/28 ,  Y02A50/2344 ,  Y02T10/26 ,  Y02T10/44

Abstract: An SO x trap catalyst (11) able to trap SO x contained in exhaust gas is arranged in an engine exhaust passage upstream of an NO x storing catalyst (12). When the SO x trap rate by the SO x trap catalyst (11) falls, the air-fuel ratio of the exhaust gas flowing into the SO x trap catalyst (11) is maintained lean and in that state the SO x trap catalyst (11) is raised in temperature. The SO x trapped at that time diffuses inside the SO x trap catalyst (11), whereby the SO x trap rate is restored.

Abstract translation: 在NOx吸留催化剂（12）的上游的发动机排气通路内配置能够捕集废气中含有的SOx的SO X捕集催化剂（11）。 当SOx捕集催化剂（11）的SOx捕获率下降时，流入SOx捕集催化剂（11）的废气的空燃比保持为稀，在该状态下，SO x捕集催化剂（11）升高 温度。 此时捕获的SOx在SO x捕集催化剂（11）内扩散，从而恢复SOx捕集率。

公开(公告)号：WO2005035952A1

公开(公告)日：2005-04-21

申请号：PCT/JP2004/014981

申请日：2004-10-04

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA ,  YOSHIDA, Kohei ,  HIROTA, Shinya ,  ASANUMA, Takamitsu ,  NAKANO, Yasuaki ,  TOSHIOKA, Shunsuke

Inventor： YOSHIDA, Kohei ,  HIROTA, Shinya ,  ASANUMA, Takamitsu ,  NAKANO, Yasuaki ,  TOSHIOKA, Shunsuke

IPC: F01N3/08

CPC classification number: F02D41/0275 ,  B01D53/9481 ,  B01D53/9495 ,  F01N3/0842 ,  F01N3/0871 ,  F01N2610/03 ,  F02B37/00 ,  F02D41/024 ,  F02D2200/0802 ,  F02D2200/0806 ,  Y02A50/2345 ,  Y02T10/26

Abstract: A NO x storing catalyst (11) comprising a precious metal catalyst (46) and NO x absorbent (47) is arranged in an exhaust passage. When the air-fuel ratio of the exhaust gas is lean, the storing catalyst cold stores the NO 2 contained in the exhaust in the absorbent when the catalyst is inactive and hot stores the cold stored NO 2 in the absorbent when the catalyst is made active. The NO 2 contained in the exhaust is cold stored in the absorbent when the catalyst is not activated, and when a predetermined NO x storing catalyst restoring condition (107) is met, a NO x storing catalyst restoring control (109, 115) including raising the NO x storing catalyst temperature to a predetermined temperature to activate it (109) is executed so as to restore the cold storing capability of the NO x absorbent.

Abstract translation: 包含贵金属催化剂（46）和NOx吸收剂（47）的NOx储存催化剂（11）布置在排气通道中。 当排气的空燃比为稀时，当催化剂不活动时，储存催化剂冷存储在吸收剂中的排气中的NO 2，并且当催化剂活化时，将热的储存的NO 2储存在吸收剂中。 当催化剂未被活化时，排气中含有的NO2被冷藏在吸收剂中，并且当满足预定的NOx储存催化剂恢复条件（107）时，存储催化剂复原控制（109,115）包括提高NOx储存 催化剂温度达预定温度以使其活化（109），以恢复NOx吸收剂的冷藏能力。