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    Emission control system and method for internal combustion engine
    4.
    发明公开
    Emission control system and method for internal combustion engine 有权
    Abgasemissionssteuerung系统和VerfahrenfürVerbrennungsmotoren

    公开(公告)号：EP1176298A3

    公开(公告)日：2004-05-12

    申请号：EP01117203.8

    申请日：2001-07-16

    申请人： TOYOTA JIDOSHA KABUSHIKI KAISHA

    发明人： Kobayashi, Masaaki ,  Matsushita, Souichi ,  Tsukasaki, Yukihiro ,  Matsuoka, Hiroki ,  Hayashi, Kotaro ,  Ishiyama, Shinobu ,  Ohtsubo, Yasuhiko ,  Magarida, Naofumi ,  Shibata, Daisuke ,  Negami, Akihiko ,  Oda, Tomihisa ,  Harada, Yasuo ,  Ono, Tomoyuki

    IPC分类号： F02D41/02 ,  F01N3/08 ,  F02D41/40

    CPC分类号： F01N3/0842 ,  F01N3/023 ,  F01N3/0253 ,  F01N3/0821 ,  F01N3/0885 ,  F01N2430/06 ,  F01N2570/16 ,  F02D41/024 ,  F02D41/028 ,  F02D41/029 ,  F02D41/405 ,  Y02T10/26 ,  Y02T10/44

    摘要： An emission control system for an internal combustion engine (1) is provided with a catalyst (4) disposed in an exhaust passage (3) of the internal combustion engine (1) for purifying an exhaust gas that enters the catalyst (4); engine operating state detecting means (15) for detecting an engine operating state of the internal combustion engine (1); catalyst temperature raising means capable of raising a temperature of the catalyst (4) in a plurality of modes; and selecting means (11) for selecting one mode from the plurality of modes based on a value detected by the engine operating state detecting means such that the catalyst temperature is raised. When the internal combustion engine is in a low load state, the catalyst temperature raising means raises the temperature of the catalyst in a first mode selected from the plurality of modes, by increasing an amount of a main fuel injected into the internal combustion engine (1) so as to make an air/fuel ratio closer to a stoichiometric value, and by adding a fuel into the exhaust passage (3). When the internal combustion engine is in an intermediate load state, the catalyst temperature raising means raises the temperature of the catalyst in a second mode selected from the plurality of modes, by injecting an additional fuel after injecting the main fuel into the internal combustion engine (1), and by adding the fuel into the exhaust passage (3). When the internal combustion engine is in a high load state, the catalyst temperature raising means raises the catalyst temperature in a third mode selected from the plurality of modes, by adding the fuel into the exhaust passage (3).

    摘要翻译： 一种用于内燃机（1）的排放物控制系统设置有设置在内燃机（1）的排气通道（3）中的用于净化进入催化剂（4）的废气的催化剂（4）; 用于检测内燃机（1）的发动机运转状态的发动机运转状态检测机构（15）。 能够以多种模式提高催化剂（4）的温度的催化剂升温装置; 以及选择装置（11），用于基于由发动机操作状态检测装置检测的值从多个模式中选择一个模式，使得催化剂温度升高。 当内燃机处于低负载状态时，催化剂升温装置通过增加喷射到内燃机（1）中的主燃料的量，使催化剂的温度从多个模式中选出的第一模式升高 ），使得空气/燃料比接近化学计量值，并且通过在排气通道（3）中添加燃料。 当内燃机处于中间负载状态时，催化剂升温装置通过在将主燃料喷射到内燃机中之后注入附加燃料而使多个模式中选择的第二模式的催化剂的温度上升（ 1），并且通过将燃料添加到排气通道（3）中。 当内燃机处于高负载状态时，通过将燃料添加到排气通路（3）中，催化剂升温装置将从多个模式中选出的第三模式的催化剂温度升高。