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    • 94. 发明授权
    • Catalyst warming apparatus of internal combustion engine
    • 内燃机催化剂加温装置
    • US06481200B1
    • 2002-11-19
    • US09690392
    • 2000-10-17
    • Shinya HirotaToshiaki Tanaka
    • Shinya HirotaToshiaki Tanaka
    • F01N300
    • B01D53/9454B01D53/9495F01N3/0222F01N3/035F01N3/204F01N13/009F01N13/0093F01N2260/14F02D9/04Y02T10/22Y02T10/26
    • A catalyst warming apparatus for an internal combustion engine provides an appropriate combustible mixture for heating an exhaust-purifying catalyst disposed in an exhaust passage of an internal combustion engine, without providing a special pre-mixing chamber for mixing fuel and air, by burning the combustible mixture in the exhaust passage upstream of the exhaust-purifying catalyst when the exhaust-purifying catalyst is inactive. Specifically, fuel components and air discharged from the internal combustion engine are mixed into a combustible mixture in a sub exhaust-purifying catalyst disposed in the exhaust passage upstream of a main exhaust-purifying catalyst, and the resultant combustible mixture is burned upstream of the main exhaust-purifying catalyst.
    • 一种用于内燃机的催化剂加热装置,提供适当的可燃混合物,用于加热设置在内燃机排气通道中的排气净化催化剂,而不需要提供用于混合燃料和空气的特殊预混合室,通过燃烧可燃物 当排气净化催化剂不活动时,在排气净化催化剂上游的排气通路中的混合物。 具体地说,将燃料成分和从内燃机排出的空气混合在主排气净化催化剂上游侧的排气通道内的副排气净化催化剂中的可燃性混合物中,将得到的可燃性混合物燃烧在主排气净化催化剂上游 废气净化催化剂。
    • 96. 发明授权
    • Exhaust gas purifying apparatus for internal combustion engine
    • 内燃机用废气净化装置
    • US06209317B1
    • 2001-04-03
    • US09295471
    • 1999-04-19
    • Shinya Hirota
    • Shinya Hirota
    • F01M300
    • F02D41/0235B01D53/9418B01D53/9486B01D53/9495B01D2251/208F01N3/0814F01N3/0835F01N3/0871F01N3/2053F01N3/2066F01N13/009F01N13/0097F01N2610/02F01N2610/03F02D21/08F02M26/15Y02T10/24
    • An exhaust gas purifying apparatus including an HC absorbent located in an upstream region of a selective reduction type NOx catalyst for improving a NOx purification efficiency. In the exhaust gas purifying apparatus, an HC absorbing device is disposed upstream of a NOx catalyst converter arranged in an exhaust gas passageway. The selective reduction type NOx catalyst accommodated in the HC absorbing device uses a carrier, which is easy to absorb the HC when a temperature of the exhaust gas is lowered, and easy to desorb the HC when the temperature of the exhaust gas is raised, and a selective reduction type NOx catalyst accommodated in the NOx catalyst converter uses a carrier which has a strong absorption of HC for retention. In order to prevent a catalyst temperature of the NOx catalyst converter from being lowered to a temperature lower than a purification temperature window in an operating state of deceleration, an ECU corrects an opening degree of an EGR valve to be increased, and thereby a flow rate of the exhaust gas which flows into the NOx catalyst converter is decreased when an inlet gas temperature detected by an inlet gas temperature sensor is lowered to a temperature lower than a set temperature. Thus, lowering of the catalyst temperature is suppressed.
    • 一种废气净化装置,包括位于选择还原型NOx催化剂的上游区域的HC吸收剂,用于提高NOx净化效率。 在排气净化装置中,HC吸收装置设置在排气通路内的NOx催化剂转换器的上游。 容纳在HC吸收装置中的选择还原型NOx催化剂使用载体,当载气的温度降低时容易吸收HC,并且当废气的温度升高时容易解吸HC, 容纳在NOx催化转化器中的选择还原型NOx催化剂使用具有高吸收HC以保留的载体。 为了防止NOx催化转化器的催化剂温度在减速运转状态下降低至低于净化温度窗口的温度,ECU对EGR阀的开度进行校正,使EGR阀的开度升高, 当由入口气体温度传感器检测到的入口气体温度降低到低于设定温度的温度时,流入NOx催化剂转换器的废气减少。 因此,抑制了催化剂温度的降低。
    • 98. 发明授权
    • Exhaust gas purifying device for engine
    • 发动机废气净化装置
    • US5996338A
    • 1999-12-07
    • US959037
    • 1997-10-28
    • Shinya Hirota
    • Shinya Hirota
    • B01D53/86B01D53/94F01N3/08F01N3/10F01N3/20F01N3/24F01N3/36F01N9/00F02B1/04F02D41/02F02D41/40
    • F02D41/405B01D53/9495F01N3/0842F01N3/0871F01N3/2013F02D41/024F02D41/0275F01N2250/12F01N2610/03F01N2610/146F02B1/04Y02T10/26Y02T10/44
    • An exhaust gas purifying device for an engine comprises an exhaust gas purifying catalyst with an electric heater arranged in the exhaust passage capable of temporarily adsorbing NO.sub.X in the inflowing exhaust gas therein. A NO.sub.X adsorbing capacity of the exhaust gas purifying catalyst becomes larger when a temperature of the exhaust gas purifying catalyst becomes higher. The heater is turned on and is turned off alternately and repeatedly to thereby increase and reduce the catalyst temperature. NO.sub.X in the inflowing exhaust gas is adsorbed in the exhaust gas purifying catalyst when the catalyst temperature falls, and the adsorbed NO.sub.X is desorbed from the exhaust gas purifying catalyst and reduced when the catalyst temperature increases. The catalyst temperature is controlled to increase to a first upper threshold temperature, at which the NO.sub.X adsorbing capacity of the exhaust gas purifying catalyst is substantially zero, and is controlled to fall to a first lower threshold temperature, at which the NO.sub.X adsorbing capacity of the exhaust gas purifying catalyst is substantially a maximum.
    • 一种用于发动机的废气净化装置,具有排气净化用催化剂,该排气净化用催化剂具有布置在排气通道中的电加热器,能够暂时吸附流入其中的废气中的NO x。 当废气净化催化剂的温度变高时,废气净化催化剂的NO x吸附能力变大。 加热器开启并交替重复关闭,从而增加和降低催化剂温度。 当催化剂温度下降时,流入废气中的NO x被吸附在废气净化催化剂中,并且吸附的NO x从废气净化催化剂解吸并在催化剂温度升高时降低。 控制催化剂温度升高到排气净化催化剂的NO x吸附能力基本为零的第一上阈值温度,并控制为第一下阈值温度,在该第一下阈值温度下, 废气净化催化剂基本上是最大的。