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    Exhaust gas purification device for an engine
    31.
    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：US06409973B1

    公开(公告)日：2002-06-25

    申请号：US08523455

    申请日：1995-09-05

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

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

    IPC分类号： B01D5314

    CPC分类号： B01D53/9481 ,  B01D53/9495 ,  F01N3/0842 ,  F01N3/0871 ,  F01N3/0878 ,  F01N3/22 ,  F01N13/011 ,  F01N2270/00 ,  F01N2410/12 ,  F01N2610/03 ,  F01N2610/04 ,  F02B1/04

    摘要： The exhaust gas purification device according to the present invention utilizes two NOx absorbents in order to remove NOx from the exhaust gas of an engine operated at a lean air-fuel ratio. The NOx absorbents are disposed, in series, in the exhaust passage of the engine and a nozzle for supplying a reducing agent is disposed in the exhaust passage at a position between the two NOx absorbents. Further, the device includes switching valves for changing the direction of the exhaust gas flow in the exhaust gas passage. When the switching valves are set to direct the exhaust gas flow to one direction, the exhaust gas first flows through one of the NOx absorbents (first NOx absorbent), and after passing through the first NOx absorbent, the reducing agent is supplied to the exhaust gas before it flows into the other NOx absorbent (second NOx absorbent). Thus, the first NOx absorbent absorbs NOx in the exhaust gas, and the NOx absorbed by the second NOabsorbent is released from the second NOx absorbent. When the switching valves are switched, the exhaust gas flows in the opposite direction, and flows through the second NOx absorbent and the first NOx absorbent in this order. In this case, the second NOx absorbent absorbs NOx in the exhaust gas, and the NOx absorbed by the first NOx absorbent is released and reduced to N2. Therefore, by reversing the direction of the exhaust gas periodically, the absorbing operation of NOx and releasing/reducing operation of NOx are performed by two NOx absorbents alternately. Thus, it becomes possible to remove NOx in the exhaust gas continuously while the NOx absorbents are prevented from being saturated by the absorbed NOx.

    摘要翻译： 根据本发明的排气净化装置利用两个NOx吸收剂来从以稀空燃比运转的发动机的废气中除去NOx。 NOx吸收剂串联设置在发动机的排气通道中，并且用于供给还原剂的喷嘴设置在排气通道中的两个NOx吸收剂之间的位置。 此外，该装置包括用于改变排气通道中的排气流的方向的切换阀。 当切换阀被设定为将废气流引导到一个方向时，废气首先流过NOx吸收剂之一（第一NOx吸收剂），并且在通过第一NOx吸收剂之后，还原剂被供给到排气 气体在其流入另一个NOx吸收剂（第二NOx吸收剂）之前。 因此，第一NOx吸收剂吸收废气中的NOx，并且由第二NO吸收剂吸收的NOx从第二NOx吸收剂释放。 当切换阀切换时，排气沿相反方向流动，并且依次流过第二NOx吸收剂和第一NOx吸收剂。 在这种情况下，第二NOx吸收剂吸收废气中的NOx，并且由第一NOx吸收剂吸收的NOx被释放并且还原成N2。 因此，通过周期性地反转排气的方向，NOx的吸收运转和NOx的释放/还原运转由两个NOx吸收剂交替进行。 因此，可以连续地除去排气中的NOx，同时防止NOx吸收剂被吸收的NOx饱和。

    Exhaust gas purification device for an internal combustion engine
    33.
    发明授权
    Exhaust gas purification device for an internal combustion engine 有权
    内燃机用废气净化装置

    公开(公告)号：US06289672B1

    公开(公告)日：2001-09-18

    申请号：US09346710

    申请日：1999-07-02

    申请人： Kenji Katoh ,  Takaaki Itou ,  Toshio Tanahashi ,  Hiroshi Tanaka ,  Naoto Suzuki ,  Yukio Kinugasa

    发明人： Kenji Katoh ,  Takaaki Itou ,  Toshio Tanahashi ,  Hiroshi Tanaka ,  Naoto Suzuki ,  Yukio Kinugasa

    IPC分类号： F01N300

    CPC分类号： F02D41/1462 ,  F01N3/0814 ,  F01N3/0842 ,  F01N13/009 ,  F01N13/011 ,  F01N13/107 ,  F01N2430/06 ,  F02D41/027 ,  F02D41/0275 ,  F02D41/1443 ,  F02D41/1456 ,  F02D41/1465 ,  F02D41/1498 ,  F02D41/3029 ,  F02D41/307 ,  F02D41/405 ,  F02D2011/102 ,  F02D2200/0806 ,  F02D2200/1015 ,  F02D2200/602 ,  Y02T10/44

    摘要： An NOx occluding and reducing catalyst is disposed in an exhaust gas passage of an internal combustion engine that operates at a lean air-fuel ratio. When the engine is operating at a lean air-fuel ratio, the NOx occluding and reducing catalyst absorbs NOx in the exhaust gas. To release NOx, the engine is operated at a rich air-fuel ratio so that the exhaust gas flowing into the NOx occluding and reducing catalyst acquires a rich air-fuel ratio. While the engine is operated in a region of moderate lean air-fuel ratios of from the stoichiometric air-fuel ratio to an air-fuel ratio of about 20 at the time when the engine operating air-fuel ratio is changing from a lean air-fuel ratio operation to a rich air-fuel ratio operation, an electronic control unit (ECU) of the engine injects secondary fuel, that does not contribute to combustion, into the cylinders of the engine through the direct cylinder fuel injection valves in the expansion stroke or the exhaust stroke of the cylinders, so that the exhaust gas flowing into the NOx occluding and reducing catalyst acquires a rich air-fuel ratio. This prevents unpurified NOx from flowing out of the NOx occluding and reducing catalyst at the time when the engine operating air-fuel ratio is changed.

    摘要翻译： NOx吸收还原催化剂设置在以稀空燃比运转的内燃机的排气通路中。 当发动机以稀薄的空燃比运转时，NOx吸留还原催化剂吸收废气中的NOx。 为了释放NOx，发动机以丰富的空燃比运转，使得流入NOx吸留还原催化剂的废气获得浓空燃比。 虽然发动机在发动机工作空燃比从稀薄空气燃料比变化时在从理论空燃比相对于大约20的空燃比的中等稀薄空燃比的区域中运行， 燃料比操作到丰富的空燃比操作，发动机的电子控制单元（ECU）通过膨胀冲程中的直接气缸燃料喷射阀向发动机的气缸中喷射不助于燃烧的二次燃料 或气缸的排气冲程，使得流入NOx吸留还原催化剂的废气获得浓空燃比。 这防止了在发动机运转空燃比变化时未净化的NOx从NOx吸留还原催化剂流出。

    Exhaust gas purifying apparatus for an internal combustion engine
    34.
    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
    36.
    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。

    Emission control system for an automobile
    37.
    发明授权
    Emission control system for an automobile 失效
    汽车排放控制系统

    公开(公告)号：US5816214A

    公开(公告)日：1998-10-06

    申请号：US622372

    申请日：1996-03-27

    申请人： Yukio Kinugasa ,  Toru Kidokoro ,  Takaaki Itou

    发明人： Yukio Kinugasa ,  Toru Kidokoro ,  Takaaki Itou

    IPC分类号： F02M33/00 ,  B08B15/00 ,  F02F7/00 ,  F02M25/00 ,  F02M35/024 ,  F02M35/10

    CPC分类号： B08B15/00 ,  F02M25/00 ,  F02F7/006 ,  F05C2225/08

    摘要： The emission control system of the present invention removes the small amounts of polluting gases released from various parts of the automobile. These polluting gases are released from, for example, fuel oozing out from connections of the pipes in the fuel system, lubricating oil oozing out from engine body, and solvents and adhesives remaining in the interior and exterior parts of the automobile. In the emission control system of the present invention, collectors and suction pipes are provided. The collectors are disposed at the parts of the automobile from where the polluting gases are released in such a manner that the collectors enclose these parts. The suction pipes connect the respective collectors to an intake nose of an air cleaner disposed in an intake air passage of the engine. Therefore, the polluting gases released from various parts of the automobile are drawn into the engine through the respective suction pipes before they diffuse into the atmosphere, and are burned in the engine. Thus, according to the present invention, the polluting gases released from various parts of the automobile are prevented from diffusing into the atmosphere.

    摘要翻译： 本发明的排放控制系统除去从汽车各部分释放的少量污染气体。 这些污染气体例如从燃料系统中的管道的连接处渗出的燃料，从发动机主体渗出的润滑油以及残留在汽车的内部和外部的溶剂和粘合剂释放出来。 在本发明的排放控制系统中，设置有收集器和抽吸管。 收集器被布置在汽车的部分处，其中污染气体被释放，使得收集器围绕这些部件。 抽吸管将各个收集器连接到设置在发动机的进气通道中的空气滤清器的进气口。 因此，从汽车各部分释放的污染气体在扩散到大气中之前通过各个吸入管被吸入发动机，并在发动机中燃烧。 因此，根据本发明，防止从汽车的各个部分释放的污染气体扩散到大气中。

    Method for purifying combustion exhaust gas
    38.
    发明授权
    Method for purifying combustion exhaust gas 失效
    燃烧废气净化方法

    公开(公告)号：US5783160A

    公开(公告)日：1998-07-21

    申请号：US590714

    申请日：1996-01-24

    申请人： Yukio Kinugasa ,  Kouhei Igarashi ,  Takaaki Itou ,  Toshifumi Takaoka ,  Michihiro Ohashi ,  Koji Yokota

    发明人： Yukio Kinugasa ,  Kouhei Igarashi ,  Takaaki Itou ,  Toshifumi Takaoka ,  Michihiro Ohashi ,  Koji Yokota

    IPC分类号： B01D53/94 ,  F01N3/08 ,  F01N3/20 ,  F01N3/22 ,  F01N13/02 ,  B01D53/58

    CPC分类号： B01D53/9481 ,  B01D53/9409 ,  B01D53/9436 ,  B01D53/9495 ,  F01N13/009 ,  F01N3/0842 ,  F01N3/0871 ,  F01N3/206 ,  F01N3/22 ,  F01N3/222 ,  F01N2230/04 ,  F01N2240/25 ,  F01N2250/12 ,  F01N2610/02 ,  Y02T10/22

    摘要： The method for purifying combustion exhaust gas according to the present invention utilizes a NH.sub.3 decomposing catalyst. The NH.sub.3 decomposing catalyst in the present invention is capable of converting substantially all of the NH.sub.3 in the combustion exhaust gas to N.sub.2 when the air-fuel ratio of the exhaust gas is lean and the temperature of the catalyst is within a predetermined optimum temperature range. Further, when the exhaust gas contains NO.sub.x in addition to NH.sub.3, the NH.sub.3 decomposing catalyst is capable of reducing the NO.sub.x in the optimum temperature range even though the air-fuel ratio of the exhaust gas is lean. In the present invention, the conditions of the exhaust gas containing NO.sub.x are adjusted before it is fed to the NH.sub.3 decomposing catalyst in such a manner that the temperature of the exhaust gas is within the optimum temperature range and the air-fuel ratio of the exhaust gas is lean. Further, NH.sub.3 is added to the exhaust gas before it is fed to the NH.sub.3 decomposing catalyst. Therefore, a lean air-fuel ratio exhaust gas, at a temperature within the optimum temperature range, which contains both the NO.sub.x and NH.sub.3 is fed to the NH.sub.3 decomposing catalyst, and the NO.sub.x, as well as the NH.sub.3, in the exhaust gas is completely resolved by the NH.sub.3 decomposing catalyst.

    摘要翻译： 根据本发明的用于净化燃烧废气的方法利用NH 3分解催化剂。 本发明中的NH 3分解催化剂能够在排气的空燃比稀薄且催化剂的温度在预定的最佳温度范围内时将燃烧废气中的NH 3基本上全部转化成N2。 此外，当排气中含有除NH 3之外的NOx时，NH 3分解催化剂即使在排气的空燃比较稀的情况下也能够将NOx还原到最佳温度范围。 在本发明中，在将废气的温度设定在最佳温度范围内并排气的空燃比的方式调节含有NOx的废气的条件，然后送入NH 3分解催化剂 气体很瘦 此外，在将其输入到NH 3分解催化剂之前，将NH 3加入到废气中。 因此，在含有NOx和NH 3的最佳温度范围内的温度下，贫空燃比废气被供给到NH 3分解催化剂中，排气中的NOx以及NH 3是 完全由NH3分解催化剂分解。