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    Evaporated fuel processing apparatus for an internal combustion engine
    13.
    发明授权
    Evaporated fuel processing apparatus for an internal combustion engine 失效
    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。

    Method and a device for purifying combustion exhaust gas
    15.
    发明授权
    Method and a device for purifying combustion exhaust gas 失效
    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。

    Exhaust gas purification device for an engine
    16.
    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：US5740669A

    公开(公告)日：1998-04-21

    申请号：US559107

    申请日：1995-11-16

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

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

    IPC分类号： F02D45/00 ,  B01D53/56 ,  B01D53/81 ,  B01D53/86 ,  B01D53/94 ,  F01N3/08 ,  F01N3/18 ,  F01N3/30 ,  F01N9/00 ,  F01N13/02 ,  F02D41/02 ,  F02D41/04 ,  F02D41/14 ,  F01N3/28

    CPC分类号： F01N3/0842 ,  F01N13/009 ,  F01N3/0871 ,  F01N3/30 ,  F01N9/00 ,  F02D41/0275 ,  F01N2240/18 ,  F01N2390/02 ,  F01N2430/06 ,  F02D2200/0802 ,  Y02C20/10 ,  Y02T10/47

    摘要： In the present invention, a NO.sub.x absorbent is used for removing the NO.sub.x in the exhaust gas. The NO.sub.x absorbent absorbs NO.sub.x in the exhaust gas when the air-fuel ratio of the exhaust gas is lean, and releases the absorbed NO.sub.x and reduces it to nitrogen when the air-fuel ratio of the exhaust gas is rich or stoichiometric. To prevent the NO.sub.x absorbent from being saturated with the absorbed NO.sub.x, the NO.sub.x absorbent must be regenerated periodically by causing the NO.sub.x in the absorbent to be released and reduced. However, it is found that when the regenerating process by supplying a rich air-fuel ratio exhaust gas to the NO.sub.x absorbent is carried out at high NO.sub.x absorbent temperature, a part of NO.sub.x flows out from the NO.sub.x absorbent at the beginning of the regenerating process without being reduced. In the present invention, this outflow of NO.sub.x is suppressed by, for example, carrying out the regenerating process only when the temperature of the NO.sub.x absorbent is lowered to a predetermined temperature. This predetermined temperature is set low enough to ensure that the amount of the outflow of NO.sub.x is minimized.

    摘要翻译： 在本发明中，使用NOx吸收剂除去废气中的NOx。 当排气的空燃比稀薄时，NOx吸收剂吸收废气中的NOx，并且当排气的空燃比浓或化学计量时，释放吸收的NOx并将其还原成氮。 为了防止NOx吸收剂被吸收的NOx饱和，NOx吸收剂必须通过使吸收剂中的NOx释放和还原而周期性地再生。 然而，发现当在高NOx吸收温度下进行通过向NOx吸收剂供给浓空燃比废气的再生过程时，在再生过程开始时，部分NOx从NOx吸收剂流出 没有减少 在本发明中，只有当NOx吸收剂的温度下降到规定温度时，例如仅进行再生处理，可以抑制NOx的流出。 该预定温度被设定得足够低以确保NOx的流出量最小化。

    Exhaust gas purification device for an engine
    17.
    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
    19.
    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。