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11. 发明授权

US06345496B1 Method and device for purifying exhaust gas of an engine 有权
标题翻译：用于净化发动机废气的方法和装置
公开(公告)号：US06345496B1
公开(公告)日：2002-02-12
申请号：US09502127
申请日：2000-02-10
申请人： Naohide Fuwa , Hiroshi Tanaka , Yukio Kinugasa , Takaaki Itou , Naoto Suzuki , Takehisa Yaegashi , Kouhei Igarashi , Kouichi Takeuchi
发明人： Naohide Fuwa , Hiroshi Tanaka , Yukio Kinugasa , Takaaki Itou , Naoto Suzuki , Takehisa Yaegashi , Kouhei Igarashi , Kouichi Takeuchi
IPC分类号： F01N300
CPC分类号： F02D41/1475 , B01D53/8696 , B01D53/9409 , B01D53/9422 , B01D53/9431 , B01D53/9445 , B01D53/9454 , B01D53/9477 , B01D53/9495 , B01D2255/102 , B01D2255/20761 , B01D2255/50 , B01D2255/911 , F01N3/0842 , F01N3/0871 , F01N3/20 , F01N3/2053 , F01N9/00 , F01N13/009 , F01N13/011 , F01N13/107 , F01N2240/25 , F01N2250/12 , F01N2570/18 , F01N2610/02 , F01N2610/03 , F02B1/04 , F02D41/027 , F02D41/0275 , F02D41/1443 , Y02T10/22 , Y02T10/24 , Y02T10/47
摘要： An exhaust manifold (7) of an engine (1) is connected to a three way (TW) catalyst (8a), and the TW catalyst (8a) is connected to an NH3 adsorbing and oxidizing (NH3-AO) catalyst (10a). The engine (1) performs the lean and the rich engine operations alternately and repeatedly. When the engine (1) performs the rich operation and thereby the exhaust gas air-fuel ratio of the exhaust gas flowing into the TW catalyst (8a) is made rich, NOx in the inflowing exhaust gas is converted to NH3 in the TW catalyst (8a). The NH3 is then adsorbed in the NH3-AO catalyst (10a). Next, when the engine (1) performs the lean operation and thereby the exhaust gas air-fuel ratio of the exhaust gas flowing into the TW catalyst (8a) is made lean, NOx in the exhausted gas passes through the TW catalyst (8a), and flows into the NH3-AO catalyst (10a). At this time, NH3 adsorbed in the catalyst (10a) is desorbed therefrom, and reduces the inflowing NOx.
摘要翻译：发动机（1）的排气歧管（7）与三通（TW）催化剂（8a）连接，TW催化剂（8a）与NH3吸附和氧化（NH3-AO）催化剂（10a）连接，。发动机（1）交替地重复执行精益和丰富的发动机操作。当发动机（1）进行浓作操作，使流入TW催化剂（8a）的废气的排气空燃比变浓时，在TW催化剂中将流入废气中的NOx转化成NH 3 8a）。然后将NH 3吸附在NH3-AO催化剂（10a）中。接下来，当发动机（1）进行稀薄运转，从而将流入TW催化剂（8a）的废气的排气空燃比变为稀薄时，排出气体中的NOx通过TW催化剂（8a）并流入NH3-AO催化剂（10a）。此时，吸附在催化剂（10a）中的NH 3被脱附，并且减少了流入的NOx。

12. 发明授权

US6119452A Device for purifying exhaust gas of internal combustion engine 失效
标题翻译：内燃机废气净化装置
公开(公告)号：US6119452A
公开(公告)日：2000-09-19
申请号：US68684
申请日：1998-05-13
申请人： Yukio Kinugasa , Kouhei Igarashi , Takaaki Itou , Naoto Suzuki , Takehisa Yaegashi , Toshiaki Tanaka , Naoto Miyoshi
发明人： Yukio Kinugasa , Kouhei Igarashi , Takaaki Itou , Naoto Suzuki , Takehisa Yaegashi , Toshiaki Tanaka , Naoto Miyoshi
IPC分类号： B01D53/86 , B01D53/94 , F01N3/08 , F01N3/20 , F01N13/02 , F01N13/04 , F02B1/04 , F02D41/02 , F02D41/14 , F01N3/00
CPC分类号： F01N3/2073 , B01D53/8696 , B01D53/9431 , B01D53/9454 , B01D53/9495 , F01N13/009 , F01N13/011 , F01N3/0842 , F01N3/0871 , F01N3/20 , F01N3/2053 , F02D41/027 , F02D41/1443 , F02D41/1475 , F01N2240/25 , F01N2250/12 , F01N2610/02 , F02B1/04 , F02D41/0275 , Y02T10/22
摘要： A three-way catalyst (8a) is connected to a first cylinder group 1a. The exhaust gas of the first cylinder group (1a), which has passed through the three-way catalyst (8a), and the exhaust gas of a second cylinder group (1b) are introduced to an exhaust gas purifying catalyst (14). The second cylinder group (1b) performs the lean operation. The first cylinder group (1a) performs the rich operation to synthesize NH.sub.3 from NO.sub.X in the exhaust gas of the first cylinder group (1a) in the three-way catalyst (8a). In the exhaust gas purifying catalyst (14), NO.sub.X in the exhaust gas of the second cylinder group 1b is purified by NH.sub.3 from the three-way catalyst (8a). The amount of HC flowing to the three-way catalyst (8a) is obtained. When the HC amount exceeds a predetermined amount, the first cylinder group 1a must perform the lean operation temporarily, to thereby maintain the excellent catalytic activity of the three-way catalyst (8a).
摘要翻译： PCT No.PCT / JP96 / 03288 Sec。 371日期1998年5月13日 102（e）日期1998年5月13日PCT 1996年11月8日PCT PCT。公开号WO97 / 19261 日期1997年5月29日将三元催化剂（8a）连接到第一气缸组1a。已经通过三元催化剂（8a）的第一气缸组（1a）的排气和第二气缸组（1b）的排气被引入废气净化催化剂（14）。第二气缸组（1b）执行精馏操作。第一气缸组（1a）在三元催化剂（8a）中进行第一气缸组（1a）的排气中的NO x的富NH操作。在排气净化催化剂（14）中，第三气缸组1b的废气中的NO x从三元催化剂（8a）中被NH 3净化。获得流向三元催化剂（8a）的HC量。当HC量超过预定量时，第一气缸组1a必须暂时进行稀薄运转，从而保持三元催化剂（8a）的极好的催化活性。

13. 发明授权

US6128898A Exhaust gas purifying apparatus for internal combustion engine 失效
标题翻译：内燃机用废气净化装置
公开(公告)号：US6128898A
公开(公告)日：2000-10-10
申请号：US188359
申请日：1998-11-10
申请人： Kazuhiro Sakurai , Takaaki Itou , Yukio Kinugasa , Koichi Hoshi , Koichi Takeuti
发明人： Kazuhiro Sakurai , Takaaki Itou , Yukio Kinugasa , Koichi Hoshi , Koichi Takeuti
IPC分类号： G01M15/04 , F01N3/20 , F01N3/24 , F01N11/00 , F02D17/04 , F02D45/00 , F01N3/00
CPC分类号： F01N11/002 , F01N2550/02 , Y02T10/47
摘要： Disclosed is a technology of diagnosing an exhaust gas purifying apparatus about a fault in its temperature control function of controlling a temperature of an exhaust gas purifying catalyst. The exhaust gas purifying apparatus for an internal combustion engine includes the exhaust gas purifying catalyst, and a temperature control means for controlling the temperature of this exhaust gas purifying catalyst. The exhaust gas purifying apparatus is judged to be faulted, wherein at least one of a state of the temperature control means and a state of the exhaust gas purifying catalyst serves as a parameter.
摘要翻译：公开了一种在排气净化催化剂的温度控制的温度控制功能中诊断废气净化装置的技术。用于内燃机的废气净化装置包括废气净化催化剂和用于控制该废气净化催化剂的温度的温度控制装置。废气净化装置被判定为故障，其中温度控制装置的状态和废气净化催化剂的状态中的至少一个用作参数。

14. 发明授权

US6166449A Power output apparatus having a battery with a high charge-discharge efficiency 失效
标题翻译：具有电池的电力输出装置具有高的充放电效率
公开(公告)号：US6166449A
公开(公告)日：2000-12-26
申请号：US927496
申请日：1997-09-11
申请人： Toshifumi Takaoka , Yukio Kinugasa , Kouji Yoshizaki , Yoshiaki Taga, deceased , by Shigeo Taga, heir , by Takiko Taga, heiress
发明人： Toshifumi Takaoka , Yukio Kinugasa , Kouji Yoshizaki , Yoshiaki Taga, deceased , by Shigeo Taga, heir , by Takiko Taga, heiress
IPC分类号： B60K17/04 , B60K6/20 , B60K6/26 , B60K6/387 , B60K6/40 , B60K6/445 , B60K6/448 , B60K6/46 , B60L3/00 , B60L11/02 , B60L11/12 , B60L11/14 , B60L11/18 , B60W10/02 , B60W10/06 , B60W10/08 , B60W10/26 , B60W20/00 , F02D29/06 , H02J7/00 , H02P9/04 , F02N11/06
CPC分类号： B60W20/13 , B60K6/26 , B60K6/40 , B60K6/46 , B60K2006/262 , B60L7/14 , B60L11/123 , B60L11/1861 , B60L11/1862 , B60L2220/14 , B60L2220/52 , B60L2240/486 , B60L2240/62 , B60L2240/622 , B60L2240/642 , B60L2240/68 , B60W10/06 , B60W10/08 , B60W10/26 , B60W20/00 , B60W2510/244 , B60W2550/13 , B60W2550/142 , B60W2550/20 , B60W2550/402 , B60W2710/105 , Y02T10/56 , Y02T10/6217 , Y02T10/6291 , Y02T10/641 , Y02T10/7005 , Y02T10/7044 , Y02T10/705 , Y02T10/7077 , Y02T10/7291 , Y02T90/16 , Y02T90/162 , Y10S903/903 , Y10S903/906 , Y10S903/914 , Y10S903/946 , Y10S903/951
摘要： A mean vehicle speed Va and a mean variation .DELTA.Va are factors reflecting a current driving condition and an expected driving condition of a vehicle, which relate to a charge-discharge amount of a battery. A target state SOC* of the battery is calculated from the mean vehicle speed Va and the mean variation .DELTA.Va. The charge-discharge amount of the battery increases with an increase in mean vehicle speed Va and mean variation .DELTA.Va. The lower charging state of the battery results in the higher charge-discharge efficiency. The structure of the present invention sets the target state SOC* of the battery and controls the actual state of the battery to the target state SOC*, thereby enhancing the charge-discharge efficiency of the battery and ensuring a sufficient supply of electric power required for driving the vehicle.
摘要翻译：平均车速Va和平均变化量DELTA Va是与电池的充放电量相关的反映车辆的当前行驶状况和预期驾驶状况的因素。根据平均车速Va和平均变化量DELTA Va计算电池的目标状态SOC *，电池的充放电量随着平均车速Va和平均变化量DELTA Va的增加而增加，较低的充电状态的电池导致更高的充放电效率。本发明的结构设定电池的目标状态SOC *，并且将电池的实际状态控制为目标状态SOC *，从而提高电池的充放电效率，并且确保电池的足够的电力供应驾驶车辆

15. 发明授权

US6109024A Exhaust gas purification device for an internal combustion engine 失效
标题翻译：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。

16. 发明授权

US5974793A Exhaust gas purification device for an internal combustion engine 失效
标题翻译：内燃机用废气净化装置
公开(公告)号：US5974793A
公开(公告)日：1999-11-02
申请号：US837933
申请日：1997-04-11
申请人： Yukio Kinugasa , Takaaki Itou , Naoto Suzuki , Koichi Takeuchi , Hiroshi Tanaka , Naohide Fuwa
发明人： Yukio Kinugasa , Takaaki Itou , Naoto Suzuki , Koichi Takeuchi , Hiroshi Tanaka , Naohide Fuwa
IPC分类号： F02B75/10 , B01D53/94 , F01N3/08 , F01N3/20 , F01N3/24 , F01N3/28 , F01N9/00 , F01N13/02 , F01N13/04 , F02B75/18 , F02D41/00 , F02D41/02 , F02D41/04 , F02D41/14 , F02D41/34 , F02D43/00 , F02D45/00 , F02M25/07 , F02P5/15 , F01N3/00
CPC分类号： F02D41/0082 , B01D53/9454 , B01D53/9495 , F01N13/009 , F01N13/011 , F01N3/0842 , F01N3/0871 , F01N3/20 , F01N3/2053 , F01N9/00 , F02D41/1475 , F02M26/15 , F02M26/38 , F01N2250/12 , F01N2430/06 , F01N2610/02 , F02D41/0275 , Y02T10/22 , Y02T10/47
摘要： In an exhaust gas purification device, a No. 1 cylinder of the engine is operated at a rich air-fuel ratio and other cylinders (No. 2 to No. 4) are operated at a lean air-fuel ratio. The exhaust gases from the No. 1 and No. 2 cylinders are mixed with each other to form a rich air-fuel ratio exhaust gas mixture. Further, since the air-fuel ratio of the No. 2 cylinder is lean, the exhaust gas from the No. 2 cylinder contains a relatively large amount of NO.sub.x. This rich air-fuel ratio exhaust gas mixture which contains a relatively large amount of NO.sub.X is supplied to a three-way catalyst. At the three-way catalyst, part of the NO.sub.X in the exhaust gas mixture is converted to NH.sub.3. The exhaust gas mixture flowing out from the three-way catalyst and the lean exhaust gas from the No. 3 and No. 4 flow into a common exhaust gas passage where they mix with each other to form a lean exhaust gas containing NH.sub.3 from the three-way catalyst and NO.sub.X from the No. 3 and No. 4 cylinders. This lean exhaust gas flows into a denitrating catalyst disposed on the common exhaust gas passage in which NO.sub.X in the exhaust gas is reduced by the NH.sub.3.
摘要翻译：在废气净化装置中，发动机的1号气缸以较高的空燃比运转，其他气缸（No.2〜No.4）以稀空燃比运转。来自1号和2号气缸的废气彼此混合，形成浓空气燃料比的废气混合物。此外，由于2缸的空燃比为稀，所以来自2号气缸的废气含有较多的NOx。将含有较多量的NO x的浓空燃比废气混合物供给至三元催化剂。在三元催化剂中，废气混合物中的一部分NO x转化为NH 3。从三元催化剂流出的废气混合物和来自3号和4号的贫废气流入共同的废气通道，在那里它们彼此混合，形成三来自3号和4号气瓶的催化剂和NOX。这种贫废气流入设置在排气中的NO x被NH 3还原的共用排气通道上的脱硝催化剂中。

17. 发明授权

US5323751A Device for controlling operation of fuel evaporative purge system of an internal combustion engine 失效
标题翻译：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。

18. 发明授权

US5836291A Evaporated fuel processing apparatus for an internal combustion engine 失效
标题翻译：用于内燃机的蒸发燃料处理装置
公开(公告)号：US5836291A
公开(公告)日：1998-11-17
申请号：US862042
申请日：1997-05-22
申请人： Yukio Kinugasa , Takaaki Itou , Yoshihiko Hyodo , Toru Kidokoro , Naoya Takagi
发明人： Yukio Kinugasa , Takaaki Itou , Yoshihiko Hyodo , Toru Kidokoro , Naoya Takagi
IPC分类号： G01C21/00 , F02D41/00 , F02M25/08 , F02D41/04 , F02D41/14
CPC分类号： F02D41/0032 , F02D2200/701 , F02M25/08
摘要： An evaporative fuel processing apparatus which can optimally process fuel gas according to navigation information or the like. This apparatus obtains future running information from a navigation system and further predicts an amount quantity of fuel vapor generated in a fuel tank (13) according to the running information. Further, the apparatus determines an amount of fuel vapor to be purged from a canister (14), namely, a valve opening of a purge control valve (142) so that an amount of fuel vapor adsorbed in the canister (14) is not more than a predetermined upper limit and that an amount of fuel adsorbed in the canister (14) after running is almost zero. Thus, an evaporation emission is reduced and the durability of the canister is prolonged by controlling the purge control valve.
摘要翻译：能够根据导航信息等优化燃料气体的蒸发燃料处理装置。该装置从导航系统获取未来的运行信息，并且根据运行信息进一步预测在燃料箱（13）中产生的燃料蒸汽的量。此外，该装置确定从罐（14）即净化控制阀（142）的阀开口排出的燃料蒸汽的量，使得吸附在罐（14）中的燃料蒸汽的量不多并且运行后在罐（14）中吸附的燃料量几乎为零。因此，通过控制清洗控制阀，减少了蒸发发射并延长了罐的耐久性。

19. 发明授权

US5778667A Method and a device for purifying combustion exhaust gas 失效
标题翻译：燃烧废气净化方法和装置
公开(公告)号：US5778667A
公开(公告)日：1998-07-14
申请号：US876608
申请日：1997-06-16
申请人： Yukio Kinugasa , Takaaki Itou , Naoto Suzuki
发明人： Yukio Kinugasa , Takaaki Itou , Naoto Suzuki
IPC分类号： B01D53/94 , F01N3/08 , F01N3/20 , F01N3/24 , F01N9/00 , F01N13/02 , F01N13/04 , F02D41/14 , F01N3/36
CPC分类号： F01N3/2073 , B01D53/9481 , B01D53/9495 , F01N13/009 , F01N13/011 , F01N3/0842 , F01N3/0871 , F01N3/2053 , F01N9/00 , B01D2251/2062 , B01D53/9418 , B01D53/945 , F01N2240/25 , F01N2250/12 , F01N2610/02 , Y02T10/22 , Y02T10/24 , Y02T10/47
摘要： In the present invention, the No. 1 cylinder of an engine is connected to a first exhaust passage and the No. 2 to No. 4 cylinders are connected to a second exhaust passage. A three-way catalyst and a NO.sub.X absorbent are disposed in the first and second exhaust passage, respectively. A denitrating catalyst is disposed in a common exhaust passage to which the first and second exhaust passage merge. The NO.sub.X absorbent absorbs NO.sub.X when the No. 2 to No. 4 cylinders are operated at a lean air-fuel ratio, and is regenerated, i.e., releases and reduces the absorbed NO.sub.X when the No. 2 to No. 4 cylinders are operated at a rich air-fuel ratio. However, NO.sub.X, without being reduced, is released from the NO.sub.X absorbent during a short period at the beginning of the regenerating operation. In the present invention, the No. 1 cylinder is operated at a rich air-fuel ratio during the short period at the beginning of the regenerating operation in order to produce NH.sub.3 at the three-way catalyst. Therefore, when NO.sub.X without being reduced is released from the NO.sub.X absorbent and flows into the denitrating catalyst on the common exhaust passage, NH.sub.3 produced at the three-way catalyst is also supplied to the denitrating catalyst. Thus, NO.sub.X released from the NO.sub.X absorbent at the beginning of the regenerating operation is reduced at the denitrating catalyst by NH.sub.3 produced at the three-way catalyst.
摘要翻译：在本发明中，发动机的1号缸与第一排气通路连接，第2〜4缸与第2排气通路连接。分别在第一和第二排气通道中设置三元催化剂和NOX吸收剂。脱气催化剂设置在第一和第二排气通道合流的公共排气通道中。当2号至4号气缸以稀薄的空燃比运行时，NOX吸收剂吸收NOX，并且再生时，即当第2号至第4号气缸运行时释放并减少吸收的NOX 丰富的空燃比。然而，在再生操作开始时的短时间内，NOX不被还原，从NOX吸收剂中释放出来。在本发明中，为了在三元催化剂下生成NH 3，在再生运转开始的短时间内，1号气缸以浓空燃比运转。因此，当没有还原的NO x从NOX吸收剂中释放并流入共用排气通道的脱硝催化剂时，在三元催化剂上生成的NH 3也被供给到脱硝催化剂。因此，在再生操作开始时从NOX吸收剂释放的NOX在脱氮催化剂下通过在三元催化剂下产生的NH 3而降低。

20. 发明授权

US06289672B1 Exhaust gas purification device for an internal combustion engine 有权
标题翻译：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。

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