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    Exhaust gas purification system of internal combustion engine
    1.
    发明授权
    Exhaust gas purification system of internal combustion engine 失效
    内燃机废气净化系统

    公开(公告)号：US07313913B2

    公开(公告)日：2008-01-01

    申请号：US11077205

    申请日：2005-03-11

    申请人： Shinichiro Okugawa ,  Kazuo Kobayashi ,  Hiroshi Haraguchi

    发明人： Shinichiro Okugawa ,  Kazuo Kobayashi ,  Hiroshi Haraguchi

    IPC分类号： F01N3/00

    CPC分类号： F02D41/029 ,  F01N2250/02 ,  F01N2250/06 ,  F01N2260/04 ,  F01N2430/06 ,  F02D41/0055 ,  F02D2041/0017

    摘要： An oxidation catalyst is disposed upstream of a diesel particulate filter (DPF) in an exhaust passage of a diesel engine. An electronic control unit (ECU) operates temperature increasing circuit to combust and eliminate particulate matters deposited on the DPF. The ECU determines execution and stoppage of regeneration of the DPF based on a quantity of the particulate matters deposited on the DPF. The ECU increases an exhaust gas recirculation quantity (EGR quantity) during the regeneration to reduce an intake air quantity from the intake air quantity in a non-regeneration period and to achieve a flow rate of the exhaust gas passing through the DPF suitable for the temperature increase. The ECU corrects a valve opening degree of an EGR control valve based on the sensed intake air quantity to reduce a variation in the exhaust gas flow rate.

    摘要翻译： 氧化催化剂设置在柴油发动机的排气通道中的柴油机微粒过滤器（DPF）的上游。 电子控制单元（ECU）操作升温电路来燃烧和消除沉积在DPF上的颗粒物质。 ECU根据沉积在DPF上的颗粒物质的量来确定DPF再生的执行和停止。 ECU在再生期间增加废气再循环量（EGR量），以在非再生时段内从进气量减少进气量，并且实现通过适合于温度的DPF的排气的流量 增加。 ECU根据检测到的进气量来校正EGR控制阀的阀开度，以减少废气流量的变化。

    Exhaust gas cleaning system of internal combustion engine
    3.
    发明授权
    Exhaust gas cleaning system of internal combustion engine 有权
    内燃机排气净化系统

    公开(公告)号：US07076944B2

    公开(公告)日：2006-07-18

    申请号：US10810750

    申请日：2004-03-29

    申请人： Shinichiro Okugawa ,  Tsukasa Kuboshima

    发明人： Shinichiro Okugawa ,  Tsukasa Kuboshima

    IPC分类号： F01N3/00

    CPC分类号： F02D41/029 ,  F01N3/023 ,  F01N3/035 ,  F01N9/002 ,  F01N13/009 ,  F02D41/025 ,  F02D41/405 ,  F02D2200/0804 ,  F02D2200/0812 ,  Y02T10/26 ,  Y02T10/44 ,  Y02T10/47

    摘要： An exhaust gas cleaning system of a diesel engine includes a diesel particulate filter (a DPF) disposed in an exhaust passage, and a diesel oxidation catalyst (a DOC) disposed upstream of the DPF. When an electronic control unit (an ECU) performs a temperature increasing operation such as post-injection to eliminate particulate matters accumulated in the DPF, a ratio (a duty ratio) between a performing period and an interrupting period of the temperature increasing operation is changed in accordance with temperature of the DPF. Thus, a quantity of hydrocarbon supplied to the DOC is controlled stepwise or continuously. Thus, the temperature of the DPF can be increased to target temperature quickly and can be maintained near the target temperature when the regeneration of the DPF is performed.

    摘要翻译： 柴油发动机的废气净化系统包括设置在排气通道中的柴油机微粒过滤器（DPF）和设置在DPF上游的柴油机氧化催化剂（DOC）。 当电子控制单元（ECU）执行诸如后注入的升温操作以消除在DPF中累积的颗粒物质时，升温操作的执行周期和中断时段之间的比率（占空比）被改变 根据DPF的温度。 因此，供给到DOC的碳氢化合物的量被逐步或连续地控制。 因此，当执行DPF的再生时，DPF的温度可以快速提高到目标温度并且可以保持在目标温度附近。

    Exhaust emission control device of internal combustion engine
    4.
    发明授权
    Exhaust emission control device of internal combustion engine 有权
    内燃机废气排放控制装置

    公开(公告)号：US07703278B2

    公开(公告)日：2010-04-27

    申请号：US11118344

    申请日：2005-05-02

    申请人： Kazuo Kobayashi ,  Shinichiro Okugawa

    发明人： Kazuo Kobayashi ,  Shinichiro Okugawa

    IPC分类号： F01N3/00

    CPC分类号： F02D41/0245 ,  F01N3/0253 ,  F01N9/002 ,  F01N9/005 ,  F01N13/009 ,  F01N2330/06 ,  F01N2430/06 ,  F01N2430/08 ,  F01N2430/085 ,  F01N2510/065 ,  F01N2900/0422 ,  F02D41/0055 ,  F02D41/029 ,  F02D2200/0804 ,  F02D2200/0812 ,  F02M26/13 ,  Y02T10/26 ,  Y02T10/47

    摘要： An exhaust emission control device includes a plurality of devices for removing particulates accumulated in a particulate filter. A temperature increasing device increases a temperature of the particulate filter. A temperature estimator estimates the temperature of the particulate filter. A particulate accumulation quantity estimator estimates a quantity of accumulated particulates. A temperature increase quantity controller controls a temperature increase to an output of the temperature estimator when the quantity of accumulated particulates exceeds a predetermined value. A time ratio processor computes a time ratio between performance and interruption of a temperature increasing operation. A base period processor computes a base period such that the base period varies from time to time. A switching device switches between performance and interruption of the temperature increasing operation based on the time ratio and the period that becomes the base.

    摘要翻译： 废气排放控制装置包括用于去除积聚在微粒过滤器中的微粒的多个装置。 升温装置增加微粒过滤器的温度。 温度估计器估计微粒过滤器的温度。 颗粒物积累量估计器估计累积颗粒物的数量。 当累积的微粒的量超过预定值时，温度增加量控制器控制温度增加到温度估计器的输出。 时间比率处理器计算升温操作的性能和中断之间的时间比。 基本周期处理器计算基准周期，使得基准周期随时间变化。 开关装置基于时间比和成为基准的周期，在升温操作的性能和中断之间切换。

    Exhaust emission control device for internal combustion engine
    5.
    发明授权
    Exhaust emission control device for internal combustion engine 失效
    内燃机废气排放控制装置

    公开(公告)号：US07028467B2

    公开(公告)日：2006-04-18

    申请号：US10776244

    申请日：2004-02-12

    申请人： Tsukasa Kuboshima ,  Shinichiro Okugawa ,  Hironobu Baba

    发明人： Tsukasa Kuboshima ,  Shinichiro Okugawa ,  Hironobu Baba

    IPC分类号： F01N3/00

    CPC分类号： F01N9/005 ,  F01N9/002 ,  F01N2330/06 ,  F01N2430/08 ,  F01N2430/085 ,  F01N2510/065 ,  F02D41/029 ,  F02D41/1448 ,  F02D41/187 ,  F02D41/2441 ,  F02D41/2474 ,  F02D41/28 ,  F02D41/3827 ,  F02D2041/1422 ,  F02D2200/0404 ,  F02D2200/0414 ,  F02D2200/0812 ,  Y02T10/47

    摘要： An engine exhaust emission control device determines a differential pressure across a diesel particulate filter (DPF) to enable regeneration of the DPF at optimal timing. An ECU estimates the temperature of a differential pressure sensor provided for the DPF from the output of an intake air temperature sensor when the engine is not running, and determines an offset correction factor for correcting the sensor's offset error. The factor is set using the sensor output at this time as sensor's offset error, and stored in a memory. When detecting the differential pressure across the DPF, the temperature of the sensor at this time is estimated, and an offset correction factor that corresponds to this estimated temperature is selected. The sensor outputs are adjusted with this offset correction factor.

    摘要翻译： 发动机废气排放控制装置确定柴油机微粒过滤器（DPF）两端的差压，以便能够在最佳定时再生DPF。 当发动机未运行时，ECU从进气温度传感器的输出估计为DPF设置的差压传感器的温度，并且确定用于校正传感器偏移误差的偏移校正因子。 此时，使用传感器输出设置传感器的偏移量，并存储在存储器中。 当检测到DPF两端的差压时，估计此时的传感器的温度，并且选择对应于该估计温度的偏移校正因子。 传感器输出通过该偏移校正因子进行调整。

    Exhaust gas purifying apparatus
    10.
    发明授权
    Exhaust gas purifying apparatus 有权
    废气净化装置

    公开(公告)号：US07350350B2

    公开(公告)日：2008-04-01

    申请号：US11169017

    申请日：2005-06-29

    申请人： Shinichiro Okugawa ,  Kazuo Kobayashi

    发明人： Shinichiro Okugawa ,  Kazuo Kobayashi

    IPC分类号： F01N3/00

    CPC分类号： F01N9/005 ,  F01N9/002 ,  Y02T10/47

    摘要： In an exhaust gas purifying apparatus for a diesel engine having a diesel particulate filter (DPF) provided in an exhaust pipe, a temperature of the DPF is indirectly detected (presumed) to prevent an over-heat of the DPF during a re-generation operation thereof. For that purpose, the DPF is hypothetically divided into multiple cells, the temperature at the respective cells is presumed based on a heat budget of the cell, and the maximum temperature among those multiple presumed temperatures is controlled to be lower than a predetermined value.

    摘要翻译： 在具有设置在排气管中的柴油机微粒过滤器（DPF）的柴油发动机的废气净化装置中，DPF的温度被间接地检测（假定），以防止在再生作业中DPF的过热 其中。 为此目的，将DPF假设分为多个单元，基于单元的热量预算来推定相应单元的温度，将该多个推测温度的最大温度控制为低于预定值。