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    • 5. 发明授权
    • Failure determination system, failure determination method and engine control unit for variable-cylinder internal combustion engine
    • 变量缸内燃机故障判定系统,故障判定方法和发动机控制单元
    • US06691021B2
    • 2004-02-10
    • US10046756
    • 2002-01-17
    • Jiro TakagiYasuaki AsakiMikio Fujiwara
    • Jiro TakagiYasuaki AsakiMikio Fujiwara
    • B60T712
    • F01L1/46F01L13/0005F01L2800/00F02D17/02
    • There is provided a failure determination system for a variable-cylinder internal combustion engine which is capable of promptly and accurately carrying out failure determination of the valve-actuating system for cylinders for being made idle during a partial-cylinder operation mode. The failure determination system is capable of switching a cylinder operation mode between an all-cylinder operation mode in which all the cylinders are operated, and a partial-cylinder operation mode in which part of the cylinders are made idle. The failure determination system includes an ECU which executes a failure-determining operation mode for causing a valve-actuating mechanism to resume actuation of intake valves and exhaust valves of the part of the cylinders in a state in which fuel supply to the part of the cylinders is stopped, when the cylinder operation mode is shifted from the partial-cylinder operation mode to the all-cylinder operation mode. The ECU determines whether or not the valve-actuating system including the valve-actuating mechanism has failed, based on an oxygen concentration detected when the failure-determining operation mode is executed.
    • 提供了一种用于可变气缸内燃机的故障确定系统,其能够在部分气缸操作模式期间能够及时且准确地执行用于使空转的气缸的致动系统的故障确定。 故障确定系统能够在所有气缸操作的全气缸操作模式和部分气缸空转的部分气缸操作模式之间切换气缸操作模式。 故障确定系统包括执行故障确定操作模式的ECU,该故障确定操作模式使得阀致动机构在气缸的一部分的燃料供给的状态下重新启动气缸的一部分的进气门和排气阀 当气缸操作模式从部分气缸操作模式转换到全气缸操作模式时停止。 ECU根据执行故障确定运行模式时检测到的氧气浓度,判断包括阀致动机构的阀门致动系统是否发生故障。