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    • 4. 发明公开
    • 내연 기관의 공연비 제어 장치
    • 内燃机空燃比控制装置
    • KR1020060096152A
    • 2006-09-07
    • KR1020067010675
    • 2004-11-29
    • 도요타 지도샤(주)
    • 나카가와노리히사아키요시아스카
    • F02D41/02F02D41/14
    • F01N3/101F01N3/20F01N13/009F01N13/0093F02D41/0295F02D41/1441F02D41/1443F02D41/1446F02D41/1475F02D41/2448F02D41/2454F02D2200/0804F02D2200/0814Y02T10/22
    • An air-fuel ratio control apparatus of an internal combustion engine includes first and second catalysts 10 and 12, first air-fuel ratio acquiring means 8 provided upstream of the first catalyst, for acquiring an air-fuel ratio of exhaust gas; second air-fuel ratio acquiring means 11 for acquiring an air-fuel ratio of the exhaust gas flowing into the second catalyst, and air-fuel ratio controlling means 13 for controlling an air-fuel ratio according to the air-fuel ratios acquired by the first and second air-fuel ratio acquiring means, and the air-fuel ratio controlling means is provided with lean control means 13 for controlling an air-fuel ratio until the second catalyst becomes lean after completion of a fuel quantity increasing operation of the engine, and intermediate lean control means 13 for performing control to change the air-fuel ratio to a lean air-fuel ratio within the range enough to make the first catalyst lean and not enough to make the second catalyst lean, between the fuel quantity increasing operation and the air- fuel ratio control by the lean control means.
    • 内燃机的空燃比控制装置具有第一和第二催化剂10,12,设置在第一催化剂上游的第一空燃比获取单元8,用于获取废气的空燃比; 用于获取流入第二催化剂的排气的空燃比的第二空燃比获取单元11,以及空燃比控制单元13,其根据由上述空气燃料比获取的空燃比控制空燃比 第一和第二空燃比获取装置,并且空燃比控制装置设置有稀薄控制装置13,用于在完成发动机的燃料增加操作之后控制空燃比直到第二催化剂变稀, 和中间稀薄控制装置13,用于进行控制,以使空燃比在足够的范围内使空燃比使第一催化剂变稀,并且不足以使第二催化剂在燃料增加操作和 由稀薄控制装置控制空燃比。