公开(公告)号：US20090007548A1

公开(公告)日：2009-01-08

申请号：US12224341

申请日：2007-03-05

申请人： Kazuhiro Itoh

发明人： Kazuhiro Itoh

IPC分类号： F01N9/00

CPC分类号： B01D53/9409 ,  B01D2251/2067 ,  F01N3/0814 ,  F01N3/208 ,  F01N9/00 ,  F01N2560/02 ,  F01N2560/06 ,  F01N2560/14 ,  F01N2610/02 ,  F01N2610/146 ,  F01N2900/1622 ,  Y02T10/24 ,  Y02T10/47

摘要： A catalyst suited for reducing NOx in an exhaust gas by ammonia in the presence of excess oxygen is arranged in an engine exhaust passage. An aqueous urea solution is fed from a flow addition valve onto a catalyst, part of the urea fed to the catalyst is stored in the catalyst, and the ammonia generated from the urea stored in the catalyst is used to reduce the NOx in the exhaust gas. At the time of engine startup, at the time of cold operation, and at the time of increase of the HC amount, it is determined that the amount of formaldehyde in the exhaust gas flowing into the catalyst exceeds the allowable amount, and, at this time, the feed of urea to the catalyst is prohibited.

摘要翻译： 在发动机排气通道中设置有适于在过量氧气存在下用氨还原废气中的NOx的催化剂。 将尿素水溶液从流量添加阀进料到催化剂上，将进料到催化剂的一部分尿素储存在催化剂中，并且使用从储存在催化剂中的尿素产生的氨来减少废气中的NOx 。 在发动机启动时，在冷运行时，在HC量增加时，判定流入催化剂的排气中的甲醛量超过容许量，在此 时间，禁止向催化剂进料尿素。

公开(公告)号：US06988360B2

公开(公告)日：2006-01-24

申请号：US10620342

申请日：2003-07-17

申请人： Koichi Kimura ,  Shinya Hirota ,  Yoshimitsu Henda ,  Kazuhiro Itoh ,  Takamitsu Asanuma ,  Shunsuke Toshioka ,  Yasuaki Nakano ,  Koichiro Nakatani ,  Akira Mikami

发明人： Koichi Kimura ,  Shinya Hirota ,  Yoshimitsu Henda ,  Kazuhiro Itoh ,  Takamitsu Asanuma ,  Shunsuke Toshioka ,  Yasuaki Nakano ,  Koichiro Nakatani ,  Akira Mikami

IPC分类号： F01N3/00

CPC分类号： F01N3/0821 ,  F01N3/0233 ,  F01N3/031 ,  F01N3/0807 ,  F01N3/0814 ,  F01N3/0842 ,  F01N3/085 ,  F01N3/0871 ,  F01N13/02 ,  F01N2410/00 ,  F01N2410/12 ,  F01N2610/03

摘要： An exhaust emission purification device comprises a sulfur component holding agent arranged on the exhaust path of an internal combustion engine for holding a sulfur component, a NOx holding agent arranged downstream of the sulfur component holding agent in the exhaust gas for holding NOx and the sulfur components when the air-fuel ratio of the exhaust gas flowing thereinto is lean, and a reducing agent adding unit for adding a reducing agent to the exhaust gas flowing into the NOx holding agent. The concentration of the sulfur component contained in the reducing agent added by the reducing agent adding unit is lower than the concentration of at least the sulfur component contained in the fuel supplied to the combustion chamber of the internal combustion engine. Thus, the sulfur poisoning of the exhaust emission purifier can be avoided while at the same time reducing the fuel consumption rate.

摘要翻译： 排气净化装置，其特征在于，具备配置在所述硫成分保持用内燃机的排气路径上的硫成分保持剂，位于所述排气中的硫成分保持剂的下游的NO x 用于保持NO x的气体和流入其中的排气的空燃比变少的硫成分;还原剂添加单元，用于向流入NO的废气中添加还原剂 保持剂。 由还原剂添加单元添加的还原剂中所含的硫成分的浓度低于供给到内燃机的燃烧室的燃料中至少含有的硫成分的浓度。 因此，可以避免排气净化器的硫中毒，同时降低燃料消耗率。

公开(公告)号：US20050262829A1

公开(公告)日：2005-12-01

申请号：US11142329

申请日：2005-06-02

申请人： Kazuhiro Itoh ,  Toshiaki Tanaka ,  Eiji Iwasaki ,  Shinya Hirota

发明人： Kazuhiro Itoh ,  Toshiaki Tanaka ,  Eiji Iwasaki ,  Shinya Hirota

IPC分类号： F01N3/08 ,  B01D53/90 ,  B01D53/94 ,  C01B21/00 ,  F01N3/00 ,  F01N3/10 ,  F01N3/20 ,  F01N3/24 ,  F01N3/28 ,  F01N11/00 ,  F01N13/02 ,  F01N13/04 ,  F02D21/08 ,  F02D41/00 ,  F02D41/02 ,  F02D41/12 ,  F02M25/06 ,  F02M25/07

CPC分类号： B01D53/9409 ,  B01D53/90 ,  B01D53/9431 ,  B01D53/9495 ,  B01D2251/2062 ,  F01N3/2053 ,  F01N3/206 ,  F01N3/2066 ,  F01N3/208 ,  F01N11/002 ,  F01N13/009 ,  F01N13/0093 ,  F01N13/0097 ,  F01N13/011 ,  F01N2250/12 ,  F01N2510/063 ,  F01N2510/0682 ,  F01N2560/06 ,  F01N2570/14 ,  F01N2570/18 ,  F01N2610/02 ,  F01N2610/146 ,  F01N2900/08 ,  F01N2900/1402 ,  F01N2900/1622 ,  F02D35/025 ,  F02D41/0055 ,  F02D41/0235 ,  F02D41/123 ,  F02D41/1446 ,  F02D2200/0602 ,  F02D2200/0802 ,  F02M26/13 ,  F02M26/15 ,  Y02A50/2344 ,  Y02T10/24 ,  Y02T10/47

摘要： A catalyst (22) suitable for reduction of the NOx in an exhaust gas by ammonia in the presence of excess oxygen is arranged in the exhaust passage (18, 21) of an internal combustion engine. An aqueous urea solution is fed through a flow control valve (33) to the inside of the exhaust passage (21) upstream of the catalyst (22). When the temperature of the catalyst (22) is low, a large amount of the aqueous urea solution is fed to make the urea contained in the aqueous urea solution be stored in the catalyst (22). When the engine is accelerated and the temperature of the catalyst (22) rises, ammonia is released at a little at a time from the inside of the catalyst (22) and the NOx in the exhaust gas is reduced by the released ammonia.

公开(公告)号：US20050204729A1

公开(公告)日：2005-09-22

申请号：US11142355

申请日：2005-06-02

申请人： Kazuhiro Itoh ,  Toshiaki Tanaka ,  Eiji Iwasaki ,  Shinya Hirota

发明人： Kazuhiro Itoh ,  Toshiaki Tanaka ,  Eiji Iwasaki ,  Shinya Hirota

IPC分类号： F01N3/08 ,  B01D53/90 ,  B01D53/94 ,  C01B21/00 ,  F01N3/00 ,  F01N3/10 ,  F01N3/20 ,  F01N3/24 ,  F01N3/28 ,  F01N11/00 ,  F01N13/02 ,  F01N13/04 ,  F02D21/08 ,  F02D41/00 ,  F02D41/02 ,  F02D41/12 ,  F02M25/06 ,  F02M25/07

CPC分类号： B01D53/9409 ,  B01D53/90 ,  B01D53/9431 ,  B01D53/9495 ,  B01D2251/2062 ,  F01N3/2053 ,  F01N3/206 ,  F01N3/2066 ,  F01N3/208 ,  F01N11/002 ,  F01N13/009 ,  F01N13/0093 ,  F01N13/0097 ,  F01N13/011 ,  F01N2250/12 ,  F01N2510/063 ,  F01N2510/0682 ,  F01N2560/06 ,  F01N2570/14 ,  F01N2570/18 ,  F01N2610/02 ,  F01N2610/146 ,  F01N2900/08 ,  F01N2900/1402 ,  F01N2900/1622 ,  F02D35/025 ,  F02D41/0055 ,  F02D41/0235 ,  F02D41/123 ,  F02D41/1446 ,  F02D2200/0602 ,  F02D2200/0802 ,  F02M26/13 ,  F02M26/15 ,  Y02A50/2344 ,  Y02T10/24 ,  Y02T10/47

摘要： A catalyst (22) suitable for reduction of the NOx in an exhaust gas by ammonia in the presence of excess oxygen is arranged in the exhaust passage (18, 21) of an internal combustion engine. An aqueous urea solution is fed through a flow control valve (33) to the inside of the exhaust passage (21) upstream of the catalyst (22). When the temperature of the catalyst (22) is low, a large amount of the aqueous urea solution is fed to make the urea contained in the aqueous urea solution be stored in the catalyst (22). When the engine is accelerated and the temperature of the catalyst (22) rises, ammonia is released at a little at a time from the inside of the catalyst (22) and the NOx in the exhaust gas is reduced by the released ammonia.

公开(公告)号：US06769245B2

公开(公告)日：2004-08-03

申请号：US09958575

申请日：2001-10-11

申请人： Kazuhiro Itoh ,  Toshiaki Tanaka ,  Shinya Hirota ,  Koichi Kimura ,  Koichiro Nakatani

发明人： Kazuhiro Itoh ,  Toshiaki Tanaka ,  Shinya Hirota ,  Koichi Kimura ,  Koichiro Nakatani

IPC分类号： F01N300

CPC分类号： F01N3/0842 ,  F01N3/021 ,  F01N3/023 ,  F01N3/035 ,  F01N3/0821 ,  F01N2570/16 ,  F02B37/00 ,  F02D41/029 ,  F02D41/1467 ,  F02D2200/0812 ,  F02M26/05 ,  F02M26/23

摘要： A particulate filter (22) carrying an active oxygen release agent which takes in oxygen and holds oxygen when excess oxygen is present in the surroundings and releases the held oxygen in the form of active oxygen when the concentration of oxygen in the surroundings falls is arranged in an exhaust passage of an engine. The air-fuel ratio of the exhaust gas flowing into the particulate filter (22) is normally maintained lean and is occasionally switched to rich temporarily. When the air-fuel ratio of the exhaust gas is switched to rich, an oxidation reaction of the particulate on the particulate filter is promoted by the active oxygen released from the active oxygen release agent. Due to this, the particulate in the exhaust gas is continuously removed by oxidation on the particulate filter (22) without emitting a luminous flame.

摘要翻译： 一种带有活性氧释放剂的微粒过滤器（22），其在周围存在过量的氧气时吸氧并保持氧气，并且当环境中的氧浓度下降时，以活性氧的形式释放保持的氧气 发动机的排气通道。 流入微粒过滤器（22）的废气的空燃比通常保持稀薄，有时候暂时转为浓。 当排气的空燃比变为浓时，由活性氧释放剂释放的活性氧促进颗粒过滤器上的颗粒的氧化反应。 由此，废气中的颗粒通过在颗粒过滤器（22）上的氧化而不发生发光的火焰而被连续除去。

公开(公告)号：US06644022B2

公开(公告)日：2003-11-11

申请号：US09979064

申请日：2001-11-16

申请人： Shinya Hirota ,  Toshiaki Tanaka ,  Kazuhiro Itoh ,  Takamitsu Asanuma ,  Koichiro Nakatani ,  Koichi Kimura

发明人： Shinya Hirota ,  Toshiaki Tanaka ,  Kazuhiro Itoh ,  Takamitsu Asanuma ,  Koichiro Nakatani ,  Koichi Kimura

IPC分类号： F01N300

CPC分类号： F01N3/0233 ,  F01N3/023 ,  F01N3/0235 ,  F01N3/035 ,  F01N3/0821 ,  F01N3/0842 ,  F01N2260/14 ,  F01N2290/00 ,  F01N2330/06 ,  F01N2410/08 ,  F01N2510/06 ,  F01N2570/16 ,  F02B37/00 ,  F02M26/05 ,  F02M26/28

摘要： A particulate filter (22) is arranged in an exhaust passage of an engine, while an exhaust throttle valve (45) is arranged in the exhaust passage downstream of the particulate filter (22). The exhaust throttle valve (45) is fully closed once, then fully opened cyclically. At that time, the flow velocity of the exhaust gas is increased for just an instant in a pulse-like manner, whereby masses of particulate are separated from the particulate filter 22 and discharged.

公开(公告)号：US06594991B2

公开(公告)日：2003-07-22

申请号：US09817172

申请日：2001-03-27

申请人： Kazuhiro Itoh ,  Toshiaki Tanaka ,  Shinya Hirota ,  Takamitsu Asanuma ,  Koichi Kimura ,  Koichiro Nakatani

发明人： Kazuhiro Itoh ,  Toshiaki Tanaka ,  Shinya Hirota ,  Takamitsu Asanuma ,  Koichi Kimura ,  Koichiro Nakatani

IPC分类号： F01N300

CPC分类号： B01D46/0067 ,  B01D46/0036 ,  B01D46/0039 ,  B01D46/0041 ,  B01D46/24 ,  B01D46/2418 ,  B01D46/46 ,  B01D53/9431 ,  B01D2046/2492 ,  F01N3/021 ,  F01N3/0222 ,  F01N3/023 ,  F01N3/0233 ,  F01N3/0235 ,  F01N3/0253 ,  F01N3/031 ,  F01N3/035 ,  F01N3/0814 ,  F01N3/0821 ,  F01N3/0842 ,  F01N2410/00 ,  F01N2570/16 ,  F01N2610/03 ,  F02B23/06 ,  F02B23/0621 ,  F02B23/0669 ,  F02B23/0672 ,  F02B37/00 ,  F02F2001/247 ,  F02M26/05 ,  F02M26/10 ,  F02M26/23 ,  F02M26/26 ,  F02M26/28 ,  F02M26/33 ,  Y02T10/125

摘要： An exhaust purifying method and apparatus of an internal combustion engine are provided with an exhaust switch valve for switching a flow of exhaust gas flowing into an exhaust filter. By switching the exhaust switch valve, the exhaust gas is fed from one side and the other side of the filter, thereby stirring the soot (particulates) in the exhaust gas deposited on the filter having a NOx absorbent and an active-oxygen discharging agent supported thereon. Thus, the soot in the exhaust gas is continuously burned. Moreover, the switching of the exhaust switch valve and the rich spike are inhibited from being conducted simultaneously. In the case where the rich spike is conducted in order to discharge and reduce NOx absorbed in the NOx absorbent, the exhaust gas containing a large amount of HC and CO can be prevented from being discharged into the atmosphere without being purified.

摘要翻译： 内燃机的排气净化方法和装置设置有用于切换流入排气过滤器的废气流的排气切换阀。 通过切换排气开关阀，排气从过滤器的一侧和另一侧进料，从而搅拌沉积在具有NOx吸收剂的过滤器上的废气中的烟灰（微粒）和负载的活性氧排放剂 上。 因此，排气中的烟灰不断燃烧。 此外，排气开关阀和丰富尖峰的切换被抑制同时进行。 为了排出和减少吸收在NOx吸收剂中的NOx而进行浓穗的处理，可以防止含有大量HC，CO的废气排出到大气中而不被净化。

公开(公告)号：US06546721B2

公开(公告)日：2003-04-15

申请号：US09834894

申请日：2001-04-16

申请人： Shinya Hirota ,  Toshiaki Tanaka ,  Kazuhiro Itoh ,  Koichiro Nakatani ,  Koichi Kimura ,  Takamitsu Asanuma

发明人： Shinya Hirota ,  Toshiaki Tanaka ,  Kazuhiro Itoh ,  Koichiro Nakatani ,  Koichi Kimura ,  Takamitsu Asanuma

IPC分类号： F01N300

CPC分类号： F01N3/0842 ,  F01N3/0821 ,  F01N2570/14 ,  Y02A50/2344

摘要： An engine comprising a particulate filter which is arranged in the exhaust passage and has a function of absorbing NOx, where the amount of discharged particulate discharged from the combustion chamber per unit time is made smaller than the amount of particulate removable by oxidation per unit time without emitting a luminous flame on the particulate filter and where the temperature of the particulate filter is maintained in a temperature range where the NOx absorption rate becomes more than a certain value.

摘要翻译： 一种发动机，其包括布置在排气通道中并且具有吸收NOx的功能的颗粒过滤器，其中使得每单位时间从燃烧室排出的排出颗粒的量小于每单位时间通过氧化除去的颗粒的数量，而没有 在颗粒过滤器上发出发光的火焰，并且其中微粒过滤器的温度保持在NOx吸收速率变得超过一定值的温度范围内。

公开(公告)号：US06233927B1

公开(公告)日：2001-05-22

申请号：US09362287

申请日：1999-07-27

申请人： Shinya Hirota ,  Toshiaki Tanaka ,  Nobumoto Ohashi ,  Kazuhiro Itoh ,  Eiji Iwasaki ,  Kouji Yoshizaki

发明人： Shinya Hirota ,  Toshiaki Tanaka ,  Nobumoto Ohashi ,  Kazuhiro Itoh ,  Eiji Iwasaki ,  Kouji Yoshizaki

IPC分类号： F01N300

CPC分类号： F01N3/0842 ,  F01N3/0231 ,  F01N3/027 ,  F01N3/0821 ,  F01N3/0878 ,  F01N3/30 ,  F01N2410/04 ,  Y10S55/30

摘要： According to the present invention, there is provided an exhaust gas purification device, comprising a NOx absorbent arranged in an exhaust passage of an engine for absorbing NOx therein when an air-fuel ratio of an exhaust gas flowing into the NOx absorbent is lean, the NOx absorbent discharging NOx absorbed therein when a concentration of the oxygen in the exhaust gas flowing into the NOx absorbent decreases, a trapping element arranged in the exhaust passage upstream of the NOx absorbent for trapping particulates, a processing element for processing the particulates trapped in the trapping element to regenerate the trapping element, and a preventing element for preventing the exhaust gas from flowing into the NOx absorbent from the trapping element when the trapping element is regenerated.

摘要翻译： 根据本发明，提供了一种废气净化装置，其包括当流入所述NOx吸收剂的排气的空燃比稀的时候，所述排气净化装置包括设置在用于吸收NOx的发动机的排气通道中的NOx吸收体， NOx吸收剂，其中，当流入NOx吸收剂的排气中的氧浓度降低时，吸收NOx的吸收剂中的NOx吸收剂，用于捕集微粒的NOx吸收剂上游排出通道的捕集元件， 捕获元件以再生捕集元件，以及防止元件，用于在捕获元件再生时防止废气从捕集元件中流入NOx吸收剂。

公开(公告)号：US6058700A

公开(公告)日：2000-05-09

申请号：US83738

申请日：1998-05-22

申请人： Tetsuya Yamashita ,  Toshiaki Tanaka ,  Shinichi Takeshima ,  Shinya Hirota ,  Eiji Iwasaki ,  Kouji Yoshizaki ,  Nobumoto Ohashi ,  Kazuhiro Itoh

发明人： Tetsuya Yamashita ,  Toshiaki Tanaka ,  Shinichi Takeshima ,  Shinya Hirota ,  Eiji Iwasaki ,  Kouji Yoshizaki ,  Nobumoto Ohashi ,  Kazuhiro Itoh

IPC分类号： F01N3/08 ,  F01N3/18 ,  F01N3/20 ,  F01N3/24 ,  F02D41/02 ,  F02D41/04 ,  F01N3/00

CPC分类号： F01N3/0842 ,  F02D41/0275 ,  F02D41/028 ,  F01N2570/04 ,  F02D2200/0806

摘要： A device for purifying the exhaust gas of an engine comprises a NO.sub.X absorbent arranged in the exhaust passage. The NO.sub.X absorbent absorbs NO.sub.X therein when the air-fuel ratio of the inflowing exhaust gas is lean, and releases the absorbed NO.sub.X therefrom when the oxygen concentration in the inflowing exhaust gas becomes lower. The NO.sub.X absorbent also absorbs SO.sub.X therein when the air-fuel ratio of the inflowing exhaust gas is lean, and releases the absorbed SO.sub.X therefrom when the oxygen concentration in the inflowing exhaust gas becomes lower, with the temperature of the NO.sub.X absorbent being higher than a SO.sub.X releasing temperature. The air-fuel ratio of the exhaust gas flowing to the NO.sub.X absorbent is made rich temporarily when the temperature of the NO.sub.X absorbent is higher than SO.sub.X releasing temperature and when the flow rate of the exhaust gas flowing through the NO.sub.X absorbent is lower than a predetermined flow rate, to release the absorbed SO.sub.X from the NO.sub.X absorbent.

摘要翻译： 用于净化发动机废气的装置包括布置在排气通道中的NO x吸收剂。 当流入的废气的空燃比是稀的时，NO x吸收剂吸收其中的NOX，并且当流入的废气中的氧浓度变低时，释放吸收的NO x。 当流入的废气的空燃比是稀的时，NOX吸收剂也吸收SO x，并且当流入废气中的氧浓度变低时，NOX吸收剂的温度高于 SOX释放温度。 当NOX吸收剂的温度高于SOX释放温度时，当流过NOX吸收剂的排气的流量低于预定的NO x吸收剂时，流入NOX吸收剂的排气的空燃比暂时变浓 流量，从NOX吸收剂中释放吸收的SOX。