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    • 10. 发明授权
    • Exhaust gas purification device for internal combustion engine
    • 内燃机废气净化装置
    • US07832202B2
    • 2010-11-16
    • US11826027
    • 2007-07-11
    • Kazuo KojimaJun KawamuraMasumi Kinugawa
    • Kazuo KojimaJun KawamuraMasumi Kinugawa
    • F01N3/00F01N3/10
    • F01N3/0814F01N3/0842F01N2610/03
    • An exhaust gas purification device senses an air-fuel ratio of exhaust gas flowing into a catalyst and performs rich purge control for supplying fuel for reduction to the catalyst. The device calculates a total reducing agent amount consumed for the reduction during the rich purge control based on the air-fuel ratio and a fresh air amount as of the rich purge control. The device sets a specified air-fuel ratio state for controlling the air-fuel ratio in a certain range enabling more precise measurement of the air-fuel ratio than in the rich purge control. The device corrects the total reducing agent amount based on a difference between an injection amount command value as of the rich purge control and the injection amount command value in the specified air-fuel ratio state and the air-fuel ratio sensed in the specified air-fuel ratio state.
    • 废气净化装置检测流入催化剂的排气的空燃比,并进行浓缩的清洗控制,将催化剂的还原用燃料供给。 该设备基于空燃比和浓净清洗控制中的新鲜空气量,计算在浓净清洗控制期间所消耗的总还原剂量。 该装置设定规定的空燃比状态,以将空燃比控制在一定范围内,从而能够进行与空气燃料比相比更浓的测量。 该装置根据在浓空气控制中的喷射量指令值与规定的空燃比状态的喷射量指令值与规定的空燃比状态下的感测空燃比之间的差来校正总还原剂量, 燃料比状态。