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    Exhaust emission control device and exhaust emission control method for internal combustion engine
    86.
    发明专利
    Exhaust emission control device and exhaust emission control method for internal combustion engine 有权

    公开(公告)号：JP2004060537A

    公开(公告)日：2004-02-26

    申请号：JP2002220298

    申请日：2002-07-29

    Applicant: Toyota Motor Corp ,  トヨタ自動車株式会社

    Inventor： HASHIMOTO YOSHINOBU

    IPC: F02D9/02 ,  F01N3/02 ,  F01N3/20 ,  F01N3/24 ,  F01N3/28 ,  F02D17/04 ,  F02D41/12 ,  F02D41/14 ,  F02D41/22 ,  F02D41/38 ,  F02D45/00

    CPC classification number: Y02T10/47

    Abstract: PROBLEM TO BE SOLVED: To surely reduce sulfur amount accumulated in NOx catalyst without melting down the NOx catalyst. SOLUTION: The NOx catalyst is disposed in the exhaust emission passage of an internal combustion engine in which a fuel supply to the engine is stopped during a decelerating operation. To reduce the accumulated SOx amount in the NOx catalyst during the decelerating operation, an accumulated SOx reducing action to switch the average air/fuel ratio of the exhaust emission flowing into the NOx catalyst temporarily to a theoretical air/fuel ratio or a rich air/fuel ratio is performed while maintaining the temperature of the NOx catalyst at a requested temperature or higher. When the temperature of the NOx catalyst exceeds an allowable upper limit temperature TU during the accumulated SOx amount reducing action and the fuel supply to the engine is stopped, the accumulated SOx amount reducing action is temporarily stopped and a throttle opening DT is increased to the maximum opening DTm. Also the opening DE of an EGR control valve is reduced to zero. COPYRIGHT: (C)2004,JPO

    Internal combustion engine
    87.
    发明专利
    Internal combustion engine 审中-公开

    公开(公告)号：JP2004027946A

    公开(公告)日：2004-01-29

    申请号：JP2002184716

    申请日：2002-06-25

    Applicant: Toyota Motor Corp ,  トヨタ自動車株式会社

    Inventor： HASHIMOTO YOSHINOBU

    IPC: F02M25/07 ,  F01N3/20 ,  F01N3/28 ,  F01N3/36 ,  F02D13/02 ,  F02D41/04 ,  F02D41/34 ,  F02D43/00

    Abstract: PROBLEM TO BE SOLVED: To stably burn fuel in a combustion chamber when an internal combustion engine is operated at a rich air fuel ratio.
    SOLUTION: A fuel injection valve is arranged to directly inject fuel into the combustion chamber. An exhaust gas recirculating passage and an overlap period changing means for changing period of overlap during which an exhaust valve opening period Ex and a following intake valve opening period IN overlap are provided. When it is requested to discharge exhaust gas of rich air fuel ratio from the combustion chamber, air fuel ratio of exhaust gas is made rich by making average air fuel ratio of air fuel mixture in the combustion chamber rich with executing auxiliary fuel injection Qv before fuel injection Qm for driving, and exhaust gas is recirculated to the combustion chamber via the exhaust gas recirculating passage and an intake air passage by extending the overlap period.
    COPYRIGHT: (C)2004,JPO

    EXHAUST EMISSION CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE
    89.
    发明专利
    EXHAUST EMISSION CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE 审中-公开

    公开(公告)号：JP2003090254A

    公开(公告)日：2003-03-28

    申请号：JP2001283586

    申请日：2001-09-18

    Applicant: TOYOTA MOTOR CORP

    Inventor： YOSHIZAKI KOJI ,  SASAKI SHIZUO ,  KOBAYASHI NOBUKI ,  HASHIMOTO YOSHINOBU

    IPC: F02B37/00 ,  F01N3/08 ,  F01N3/24 ,  F01N3/28 ,  F02D41/04 ,  F02D41/40 ,  F02D45/00 ,  F02M25/07

    Abstract: PROBLEM TO BE SOLVED: To provide a technique for an exhaust emission control device for an internal combustion engine to suppress the restriction on the actuation of a variable capacity turbocharger due to the adhesion of a reducing agent contained in an exhaust to the turbocharger. SOLUTION: This exhaust emission control device is provided with the variable capacity turbocharger 15, a fuel injection valve 3, a fuel injection valve control means 35, an operating condition detecting means 36 for detecting operating condition and a determining means 35 determining in accordance with a detection result by the operating condition detecting means 36 if it is necessary to eliminate particle materials adhering to a movable part of the variable capacity turbocharger 15. When the determining means 35 determines that it is necessary to eliminate the particle materials, fuel is injected by the fuel injection valve control means 35 when a piston is near the top dead center at the final stage of the exhaust stroke, and another fuel injection is made at a timing delayed from a normal fuel injection timing.

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