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    Exhaust gas purifying apparatus for an internal combustion engine
    3.
    发明授权
    Exhaust gas purifying apparatus for an internal combustion engine 有权
    内燃机用废气净化装置

    公开(公告)号：US6122910A

    公开(公告)日：2000-09-26

    申请号：US273498

    申请日：1999-03-22

    申请人： Koichi Hoshi ,  Yukio Kinugasa ,  Takaaki Itou

    发明人： Koichi Hoshi ,  Yukio Kinugasa ,  Takaaki Itou

    IPC分类号： B01D53/94 ,  F01N3/08 ,  F01N3/20 ,  F01N3/22 ,  F01N3/24 ,  F01N3/28 ,  F01N3/30 ,  F01N13/02 ,  F01N13/04 ,  F02D41/02 ,  F02D41/14 ,  F01N3/00

    CPC分类号： B01D53/9454 ,  B01D53/9481 ,  B01D53/9495 ,  F01N13/009 ,  F01N13/011 ,  F01N3/0814 ,  F01N3/0835 ,  F01N3/0871 ,  F01N3/2013 ,  F01N3/22 ,  F01N3/2828 ,  F01N3/30 ,  F02D41/027 ,  F02D41/1443 ,  F01N13/107 ,  F01N2250/12 ,  F02D2250/12 ,  F02D41/1456 ,  Y02T10/22 ,  Y02T10/26

    摘要： An exhaust purifying apparatus purifies an unburnt gas component, such as unburnt hydrocarbon (HC), discharged from an internal combustion engine without fail and prevents the unburnt hydrocarbon from being discharged into the atmosphere. In order to achieve this, the exhaust gas purifying apparatus is provided with a plurality of exhaust passages connected to the internal combustion engine. A joint exhaust passage is formed by merging the exhaust passages and an exhaust gas flows through the joint exhaust passage. An adsorption/desorption unit is provided in each of the exhaust passages for adsorbing an unburnt gas component contained in the exhaust gas that flows through each of the exhaust passages at a temperature lower than a predetermined temperature. The adsorption/desorption unit desorbs the adsorbed unburnt gas component at a temperature equal to or higher than the predetermined temperature. A desorption/adjustment mechanism synchronizes timing of the unburnt gas component desorbed from the adsorption/desorption units into the exhaust purifying units.

    摘要翻译： 排气净化装置净化从内燃机排出的未燃烧的烃（HC）等未燃烧气体成分，防止未燃烧的烃被排出到大气中。 为了实现这一点，废气净化装置设置有连接到内燃机的多个排气通道。 通过汇合排气通道而形成一个联合排气通道，排气流过联合排气通道。 在每个排气通道中设置吸附/解吸单元，用于吸附在低于预定温度的温度下流过每个排气通道的废气中所含的未燃烧气体成分。 吸附/解吸装置在等于或高于预定温度的温度下解吸吸附的未燃气组分。 解吸/调节机构将从吸附/解吸单元脱附的未燃气体成分的时间同步到排气净化单元。

    Method and a device for purifying exhaust gas of an internal combustion engine
    4.
    发明授权
    Method and a device for purifying exhaust gas of an internal combustion engine 失效
    内燃机废气净化方法及装置

    公开(公告)号：US5979157A

    公开(公告)日：1999-11-09

    申请号：US911532

    申请日：1997-08-14

    申请人： Yukio Kinugasa ,  Takaaki Itou ,  Koichi Hoshi ,  Koichi Takeuchi

    发明人： Yukio Kinugasa ,  Takaaki Itou ,  Koichi Hoshi ,  Koichi Takeuchi

    IPC分类号： F01N3/08 ,  F01N3/10 ,  F01N3/20 ,  F01N3/22 ,  F01N3/24 ,  F01N3/32 ,  F01N9/00 ,  F01N13/02 ,  F02D41/02 ,  F01N3/00

    CPC分类号： F01N3/0238 ,  F01N13/009 ,  F01N13/0097 ,  F01N3/0835 ,  F01N3/0871 ,  F01N3/0878 ,  F01N3/2026 ,  F01N3/22 ,  F01N3/222 ,  F01N3/323 ,  F01N9/00 ,  F01N2250/12 ,  F01N2410/00 ,  F01N2430/06 ,  F01N2570/16 ,  F01N3/32 ,  Y02T10/26 ,  Y02T10/47

    摘要： A device for purifying exhaust gas includes an HC adsorbent and an exhaust gas purifying catalyst disposed in an exhaust gas passage in this order from the upstream side. The exhaust gas purifying catalyst is provided with an O.sub.2 storage capability, i.e., the exhaust gas purifying catalyst is capable of absorbing oxygen in the exhaust gas when the air-fuel ratio of the exhaust gas is lean, and is capable of releasing the absorbed oxygen when the air-fuel ratio of the exhaust gas becomes rich. When the engine starts, the HC adsorbent adsorbs HC in the exhaust gas. When the temperature of the exhaust gas becomes high, the HC adsorbent releases the adsorbed HC. The device also includes an engine control unit which operates the engine at a lean air-fuel ratio during a predetermined period before the releasing of the HC from the HC adsorbent occurs. Therefore, oxygen is absorbed and stored in the exhaust gas purifying catalyst before the releasing of HC occurs. When the releasing of HC from the HC adsorbent occurs, the air-fuel ratio of the exhaust gas flowing into the exhaust gas purifying catalyst becomes rich due to the HC released from the HC adsorbent. This causes the exhaust gas purifying catalyst to release the absorbed oxygen, and the HC in the exhaust gas is purified by the exhaust gas purifying catalyst using the released oxygen.

    摘要翻译： 废气净化装置包括从上游侧依次排列在废气通道内的HC吸附剂和排气净化催化剂。 废气净化催化剂具有O 2储存能力，即，当废气的空燃比稀的时，废气净化催化剂能够吸收废气中的氧，并且能够释放吸收的氧 当排气的空燃比变浓时， 当发动机启动时，HC吸附剂吸附废气中的HC。 当废气的温度变高时，HC吸附剂释放吸附的HC。 该装置还包括发动机控制单元，其在从HC吸附剂释放HC之前的预定时间段内以稀空燃比操作发动机。 因此，在HC释放出现之前，氧气被吸收并储存在排气净化催化剂中。 当从HC吸附剂中释放出HC时，流入废气净化催化剂的排气的空燃比由于从HC吸附剂释放的HC而变浓。 这使得废气净化催化剂释放吸收的氧，并且通过使用释放的氧气的废气净化催化剂净化废气中的HC。

    Exhaust gas purification device for an engine
    5.
    发明授权
    Exhaust gas purification device for an engine 失效
    发动机废气净化装置

    公开(公告)号：US5746052A

    公开(公告)日：1998-05-05

    申请号：US525892

    申请日：1995-09-08

    申请人： Yukio Kinugasa ,  Kouhei Igarashi ,  Takaaki Itou ,  Takehisa Yaegashi ,  Toshifumi Takaoka

    发明人： Yukio Kinugasa ,  Kouhei Igarashi ,  Takaaki Itou ,  Takehisa Yaegashi ,  Toshifumi Takaoka

    IPC分类号： B01D53/94 ,  F01N3/20 ,  F01N3/22 ,  F01N3/24 ,  F01N13/02 ,  F01N13/04 ,  F02D41/04

    CPC分类号： B01D53/9454 ,  B01D53/9431 ,  B01D53/9477 ,  B01D53/9495 ,  F01N13/009 ,  F01N13/011 ,  F01N3/20 ,  F01N3/206 ,  F01N2240/25 ,  F01N2570/14 ,  F01N2610/02 ,  Y02T10/22

    摘要： In the present invention, the exhaust gas from the engine is divided into a first and a second branch exhaust passages after it passes through a three-way reducing and oxidizing catalyst, and the two branch exhaust passages merge into an exhaust gas outlet passage. In the first branch exhaust passage, an oxidizing catalyst is disposed, and in the exhaust gas outlet passage, a denitrating and oxidizing catalyst is disposed. NO.sub.x in the exhaust gas from the engine is all converted to N.sub.2 and NH.sub.3 by the three-way reducing and oxidizing catalyst and a part of the NH.sub.3 generated by the three-way catalyst flows into the first branch exhaust passage and is converted to NO.sub.x again by the oxidizing catalyst. The amount of NO.sub.x produced by the oxidizing catalyst and the amount of NO.sub.x flowing through the second branch exhaust passage is determined by the flow distribution ratio of the first and the second branch exhaust passages. In this invention, the flow ratio is determined in such a manner that the amount of the NO.sub.x produced by the oxidizing catalyst and the amount of the NH.sub.3 passing through the second branch exhaust passage are stoichiometric to produce N.sub.2 and H.sub.2 O. Therefore, when these exhaust gases flow into the denitrating and oxidizing catalyst after they mix with each other in the exhaust gas outlet passage, all the NO.sub.x and the NH.sub.3 are converted to N.sub.2 and H.sub.2 O by the denitrating and oxidizing catalyst without producing any surplus NO.sub.x or NH.sub.3.

    摘要翻译： 在本发明中，来自发动机的废气在通过三通还原氧化催化剂后被分成第一和第二分支排气通道，两个分支排气通道合流到废气出口通道中。 在第一分支排气通道中设置氧化催化剂，并且在排气出口通道中设置脱硝和氧化催化剂。 来自发动机的废气中的NOx通过三元还原氧化催化剂全部转化为N 2和NH 3，并且由三元催化剂产生的一部分NH 3流入第一分支排气通道并再次转化为NOx 通过氧化催化剂。 由氧化催化剂产生的NOx的量和流过第二分支排气通道的NOx的量由第一和第二分支排气通道的流量分配比确定。 在本发明中，流量比以如下方式确定：氧化催化剂产生的NOx的量和通过第二分支排气通道的NH 3的量是化学计量的，以产生N 2和H 2 O. 因此，当这些废气在废气出口通道中彼此混合后流入脱硝和氧化催化剂时，所有的NOx和NH 3都被脱硝和氧化催化剂转化为N 2和H 2 O，而不产生任何剩余的NOx或 NH3。

    Exhaust gas purification device for an internal combustion engine
    7.
    发明授权
    Exhaust gas purification device for an internal combustion engine 失效
    内燃机用废气净化装置

    公开(公告)号：US6109024A

    公开(公告)日：2000-08-29

    申请号：US75358

    申请日：1998-05-08

    申请人： Yukio Kinugasa ,  Takaaki Itou ,  Koichi Takeuchi

    发明人： Yukio Kinugasa ,  Takaaki Itou ,  Koichi Takeuchi

    IPC分类号： F01N3/08 ,  B01D53/86 ,  B01D53/94 ,  F01N3/24 ,  F01N3/28 ,  F01N13/02 ,  F01N13/04 ,  F02B75/12 ,  F02D41/02 ,  F02D41/40 ,  F01N3/00

    CPC分类号： F01N3/0842 ,  F01N13/009 ,  F01N13/011 ,  F01N3/101 ,  F02D41/0275 ,  F02D41/405 ,  F01N2900/0418 ,  F02B2075/125 ,  F02D2041/389 ,  Y02T10/123 ,  Y02T10/22 ,  Y02T10/44

    摘要： In an exhaust gas purification device, a three-way catalyst, an NO.sub.x absorbing-reducing catalyst and an NH.sub.3 adsorbing-denitrating catalyst are disposed in an exhaust gas passage of the internal combustion engine. The engine is provided with direct cylinder injection valves which inject fuel directly into the respective cylinders. A control circuit controls the amount of fuel injected from the injection valve so that the air-fuel ratio of the combustion in the cylinders becomes a lean air-fuel ratio during the normal operation of the engine. Therefore, a lean air-fuel ratio exhaust gas is discharged from the cylinders during the normal operation and NO.sub.x, in the exhaust gas is absorbed by the NO.sub.x absorbing-reducing catalyst. When the amount of NO.sub.x absorbed in the NO.sub.x absorbing-reducing catalyst increases to a predetermined level, the control circuit performs an additional fuel injection during the expansion stroke or exhaust stroke of cylinders in order to adjust the air-fuel ratio of the exhaust gas leaving the cylinders to a rich air-fuel ratio. The rich air-fuel ratio exhaust gas leaving the cylinders flows into the three-way catalyst and NO.sub.x in the exhaust gas is converted into NH.sub.3 at the three-way catalyst. When the rich air-fuel ratio exhaust gas flows through the NO.sub.x absorbing-reducing catalyst, NO.sub.x is released from the NO.sub.x absorbing-reducing catalyst and is reduced to N.sub.2 by NH.sub.3 in the exhaust gas.

    摘要翻译： 在排气净化装置中，在内燃机的废气通道中设置三元催化剂，NOx吸收还原催化剂和NH 3吸附脱硝催化剂。 发动机配有直接气缸喷射阀，其将燃料直接喷射到相应的气缸中。 控制电路控制从喷射阀喷射的燃料量，使得在发动机的正常运行期间气缸中的燃烧空燃比变为稀空燃比。 因此，在正常操作期间，从空气中排出贫空燃比废气，并且排气中的NOx被NOx吸收还原催化剂吸收。 当NOx吸收还原催化剂吸收的NOx的量增加到预定水平时，控制电路在气缸的膨胀冲程或排气冲程期间执行额外的燃料喷射，以便调节离开废气的空燃比 气缸以较高的空燃比。 离开气缸的富空燃比废气流入三元催化剂，废气中的NOx在三元催化剂下转化为NH3。 当富空燃比废气流过NOx吸收还原催化剂时，NOx从NOx吸收还原催化剂释放，并通过排气中的NH 3还原为N2。

    Device for controlling operation of fuel evaporative purge system of an internal combustion engine
    9.
    发明授权
    Device for controlling operation of fuel evaporative purge system of an internal combustion engine 失效
    用于控制内燃机的燃料蒸发吹扫系统的操作的装置

    公开(公告)号：US5323751A

    公开(公告)日：1994-06-28

    申请号：US110232

    申请日：1993-08-23

    申请人： Akinori Osanai ,  Takaaki Itou ,  Yukio Kinugasa

    发明人： Akinori Osanai ,  Takaaki Itou ,  Yukio Kinugasa

    IPC分类号： F02D41/00 ,  F02M25/08 ,  F02M37/04

    CPC分类号： F02M25/08 ,  F02D41/004 ,  F02M2025/0845

    摘要： A device for controlling a fuel evaporative purge system having a solenoid valve arranged in a purge passage, comprises a unit for determining a maximum amount of fuel vapor to be purged, an air flow meter, a unit for calculating a maximum purging ratio of the maximum amount of fuel vapor to an amount of intake air, a unit for setting a purging ratio which is gradually varied during the purging process, and a unit for activating the solenoid valve. In the purging operation, the activating unit drives the valve at a duty-ratio identical to a ratio of the purging ratio to the maximum purging ratio.

    摘要翻译： 一种用于控制燃料蒸发吹扫系统的装置，其具有布置在净化通道中的电磁阀，包括用于确定要净化的燃料蒸气的最大量的单元，空气流量计，用于计算最大净化比的最大净化比的单元 燃料蒸汽量相对于进气量，用于设定在清洗过程中逐渐变化的净化比的单元和用于启动电磁阀的单元。 在清扫操作中，致动单元以与清洗比与最大吹扫比的比率相同的占空比来驱动阀。