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    AIR-FUEL RATIO CONTROL APPARATUS OF INTERNAL COMBUSTION ENGINE
    2.
    发明授权
    AIR-FUEL RATIO CONTROL APPARATUS OF INTERNAL COMBUSTION ENGINE 审中-公开

    公开(公告)号：EP1706622B1

    公开(公告)日：2018-12-26

    申请号：EP04799936.2

    申请日：2004-11-29

    申请人： TOYOTA JIDOSHA KABUSHIKI KAISHA

    发明人： NAKAGAWA,Norihisa ,  AKIYOSHI,Asuka

    IPC分类号： F02D41/02

    CPC分类号： F01N3/101 ,  F01N3/20 ,  F01N13/009 ,  F01N13/0093 ,  F02D41/0295 ,  F02D41/1441 ,  F02D41/1443 ,  F02D41/1446 ,  F02D41/1475 ,  F02D41/2448 ,  F02D41/2454 ,  F02D2200/0804 ,  F02D2200/0814 ,  Y02T10/22

    摘要： 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 up-stream 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.

    CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE
    3.
    发明授权
    CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE 有权

    公开(公告)号：EP2952715B1

    公开(公告)日：2018-12-05

    申请号：EP13873617.8

    申请日：2013-01-29

    申请人： TOYOTA JIDOSHA KABUSHIKI KAISHA

    发明人： OKAZAKI, Shuntaro ,  NAKAGAWA, Norihisa ,  YAMAGUCHI, Yuji

    IPC分类号： F02D41/14 ,  G01N27/41

    CPC分类号： F01N9/00 ,  F01N11/007 ,  F01N13/009 ,  F01N13/0093 ,  F01N2430/06 ,  F01N2560/025 ,  F01N2560/14 ,  F01N2900/1624 ,  F02D41/0295 ,  F02D41/1454 ,  F02D41/1475 ,  G01N27/41

    摘要： This control device for an internal combustion engine equipped with an exhaust purification catalyst (20), which is disposed in an exhaust passage of the internal combustion engine and capable of storing oxygen, includes: a downstream air-fuel ratio detection means that is disposed downstream of the exhaust purification catalyst in the exhaust flow direction; and an inflow air-fuel ratio control means that controls the air-fuel ratio of exhaust gas flowing into the exhaust purification catalyst. If the outflow air-fuel ratio detected by the downstream air-fuel ratio detection means is equal to or less than a rich-determination air-fuel ratio, which is richer than the stoichiometric air-fuel ratio, the inflow air-fuel ratio control means sets the target air-fuel ratio of exhaust gas flowing into the exhaust purification catalyst continuously or intermittently leaner than the stoichiometric air-fuel ratio until the oxygen storage amount of the exhaust purification catalyst reaches a prescribed storage amount. If the oxygen storage amount of the exhaust purification catalyst is equal to or greater than the prescribed storage amount, the inflow air-fuel ratio control means sets the target air-fuel ratio continuously or intermittently richer than the stoichiometric air-fuel ratio until the oxygen storage amount decreases toward zero without reaching the maximum oxygen storage amount.

    ENGINE EXHAUST-GAS PURIFICATION DEVICE
    5.
    发明授权
    ENGINE EXHAUST-GAS PURIFICATION DEVICE 有权

    公开(公告)号：EP2957738B1

    公开(公告)日：2018-10-24

    申请号：EP14751687.6

    申请日：2014-01-17

    申请人： Mitsubishi Jidosha Kogyo Kabushiki Kaisha

    发明人： TSUNEKAWA, Kiyoka

    IPC分类号： F02M26/00 ,  F01N3/20 ,  F01N3/035 ,  F01N13/00

    CPC分类号： F01N3/208 ,  F01N3/035 ,  F01N13/0093 ,  F01N2900/08 ,  F02M26/05 ,  F02M26/06 ,  Y02A50/2325 ,  Y02T10/24

    摘要： An engine 1 includes: a urea water injector 40 which is provided in an exhaust pipe 30 of the engine 1 mounted on a vehicle and which injects and supplies urea water into the exhaust pipe 30; a selective reduction catalyst 34 which is provided in the exhaust pipe 30 on a downstream side of the urea water injector 40, and which reduces and purifies nitrogen oxide contained in an exhaust gas inside the exhaust pipe 30 by the urea water supplied from the urea water injector 40; and a low-pressure exhaust gas recirculation passage 45 which introduces the exhaust gas from the exhaust pipe 30 on an upstream side of the selective reduction catalyst 34 and recirculates the exhaust gas into an intake pipe 20 of the engine 1, in which when an exhaust gas recirculation valve 48 for opening and closing the low-pressure exhaust gas recirculation passage 45 is switched from a closed state to an open state, the urea water injector 40 stops injection and supply of the urea water.