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    • 2. 发明授权
    • 내연기관의 배기 정화 장치
    • 내연기관의배기정화장치
    • KR100437521B1
    • 2004-06-26
    • KR1020010020667
    • 2001-04-18
    • 도요타지도샤가부시키가이샤
    • 오노도모유키하라다야스오오다도미히사네가미아키히코시바타다이스케마가리다나오후미오쓰보야스히코이시야마시노부하야시고타로마쓰오카히로키쓰카사키유키히로마쓰시타소우이치고바야시마사아키
    • B01D53/94
    • F01N3/0842F01N3/023F01N3/0253F01N3/0821F01N3/0885F01N2430/06F01N2570/16F02D41/024F02D41/028F02D41/029F02D41/405Y02T10/26Y02T10/44
    • 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).
    • 一种用于内燃机(1)的排放控制系统设置有设置在内燃机(1)的排气通道(3)中用于净化进入催化剂(4)的排气的催化剂(4); 发动机运行状态检测装置(15),用于检测内燃机(1)的发动机运行状态; 催化剂升温装置,能够以多种模式升高催化剂(4)的温度; 以及选择装置(11),用于根据发动机工作状态检测装置检测的值从多个模式中选择一个模式,从而提高催化剂温度。 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)中的主燃料的量来提高在从多种模式中选择的第一模式中的催化剂的温度 )以使空气/燃料比接近化学计量值,并且通过将燃料添加到排气通道(3)中。 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喷射额外的燃料而以选自多个模式的第二模式升高催化剂的温度( 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道(3)中,催化剂升温装置以选自多个模式的第三模式升高催化剂温度。 <图像>