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    Failure detection system of exhaust secondary air supply system of internal combustion engine
    2.
    发明授权
    Failure detection system of exhaust secondary air supply system of internal combustion engine 失效
    内燃机排气二次供气系统故障检测系统

    公开(公告)号：US5782086A

    公开(公告)日：1998-07-21

    申请号：US674691

    申请日：1996-07-02

    申请人： Hiroaki Kato ,  Yuichi Shimasaki ,  Takashi Komatsuda ,  Akihisa Saito ,  Tetsu Teshirogi ,  Takuya Aoki ,  Hideo Furumoto ,  Hiroaki Muramatsu ,  Takayoshi Nakayama

    发明人： Hiroaki Kato ,  Yuichi Shimasaki ,  Takashi Komatsuda ,  Akihisa Saito ,  Tetsu Teshirogi ,  Takuya Aoki ,  Hideo Furumoto ,  Hiroaki Muramatsu ,  Takayoshi Nakayama

    IPC分类号： F01N3/22 ,  F01N11/00 ,  F02D41/14 ,  F02D41/22 ,  F01N3/20 ,  F01N3/30

    CPC分类号： F02D41/1475 ,  F01N11/00 ,  F02D41/221 ,  F01N2550/14 ,  Y02T10/47

    摘要： A system and method for detecting a failure occurring in an exhaust secondary air supply system of an internal combustion engine. A conduit is connected to the exhaust pipe to supply secondary air to the exhaust pipe to promote oxidization of the emissions in the exhaust gases. A valve is provided in the conduit for opening/closing it. The failure of the valve is detected by operating the air pump to supply the air in the conduit, while closing the conduit by the valve. The air/fuel ratio is detected by an oxygen sensor installed downstream of the conduit to be compared with a desired air/fuel ratio. If the detected air/fuel ratio is leaner than a desired air/fuel ratio, the air flows to the exhaust pipe so that the valve is considered to be stuck to open. Alternatively, a pump current is detected and is compared with a reference value indicative of the current at no air flow. If the detected current is less than the reference value, the valve is considered to be in failure. Moreover, the movement of a valve member is sensed to detect whether the valve is stuck to close.

    摘要翻译： 一种用于检测在内燃机的排气二次空气供给系统中发生的故障的系统和方法。 导管连接到排气管，以向排气管提供二次空气以促进废气中的排放物的氧化。 管道中设有阀门，用于打开/关闭阀门。 通过操作气泵来检测阀门的故障，以便通过阀门关闭导管时在管道中供应空气。 空气/燃料比由安装在管道下游的氧传感器检测，以与期望的空气/燃料比进行比较。 如果检测到的空气/燃料比比期望的空气/燃料比更稀，则空气流向排气管，从而认为该阀被打开。 或者，检测泵电流并将其与表示无气流的电流的参考值进行比较。 如果检测到的电流小于参考值，则认为阀门处于故障状态。 此外，检测阀构件的移动以检测阀是否被卡住以关闭。

    Exhaust gas-purifying system for internal combustion engines
    4.
    发明授权
    Exhaust gas-purifying system for internal combustion engines 失效
    内燃机排气净化系统

    公开(公告)号：US5806307A

    公开(公告)日：1998-09-15

    申请号：US698108

    申请日：1996-08-15

    申请人： Takuya Aoki ,  Yuichi Shimasaki ,  Hiroaki Kato ,  Akihisa Saito ,  Takashi Komatsuda ,  Tetsu Teshirogi ,  Takayoshi Nakayama ,  Hideo Furumoto

    发明人： Takuya Aoki ,  Yuichi Shimasaki ,  Hiroaki Kato ,  Akihisa Saito ,  Takashi Komatsuda ,  Tetsu Teshirogi ,  Takayoshi Nakayama ,  Hideo Furumoto

    IPC分类号： F02B77/08 ,  F01N3/20 ,  F01N3/24 ,  F02D29/06 ,  H02J9/02 ,  F01N3/28

    CPC分类号： H02J9/02 ,  F01N3/2013 ,  Y02T10/26

    摘要： An exhaust gas-purifying system is provided for an internal combustion engine for use in a vehicle having an alternator driven by the engine to generate electric power. An electrically-heated catalyzer is arranged in the exhaust system of the engine and connected to the alternator to be electrically heated thereby. A changeover switch is provided for selectively switching the destination of electric power generated by the alternator to the electrically-heated catalyzer and to the electrical equipment. An ECU controls the electric power generated by the alternator, depending upon a direction in which the changeover switch has been switched. The ECU detects abnormality of the changeover switch, and when the abnormality is detected, the electric power generated by the alternator is changed to a value smaller than a value assumed when the changeover switch is normal.

    摘要翻译： 本发明提供一种用于内燃机的排气净化系统，该内燃机用于具有由发动机驱动的交流发电机以产生电力的车辆。 发动机的排气系统中布置有电加热催化剂，并连接到交流发电机，从而被电加热。 提供转换开关，用于选择性地将由交流发电机产生的电力的目的地切换到电加热催化器和电气设备。 ECU根据切换开关的方向控制交流发电机产生的电力。 ECU检测到切换开关的异常，并且当检测到异常时，由交流发电机产生的电力变为小于当切换开关正常时假设的值。