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    • 77. 发明授权
    • Electronic control system and method having monitor program
    • 具有监控程序的电子控制系统和方法
    • US06230094B1
    • 2001-05-08
    • US09262348
    • 1999-03-04
    • Hideyuki OhashiKuraji KatoHiroshi Shibata
    • Hideyuki OhashiKuraji KatoHiroshi Shibata
    • F02D4122
    • F02D41/22F02D11/107F02D41/266F02D2041/227G05B19/0428
    • An electronic control system has an engine control computer and a throttle control computer. The engine control computer has a monitor program separate from an engine control program. The monitor program is for checking the operation of the throttle control computer and executed by the engine control computer as a timer interrupt routine. A watch dog timer is connected to the engine control computer to detect malfunction of the monitor program in response to a watch dog pulse produced during the execution of the monitor program. The watch dog timer disables an electronic throttle control by the throttle control computer upon detection of the malfunction of the monitor program. At the same time, the engine control mode is changed from a normal engine control to an engine power reduction control thereby to ensure a limp-home operation of the engine.
    • 电子控制系统具有发动机控制计算机和节气门控制计算机。 发动机控制计算机具有与发动机控制程序分开的监视程序。 监视程序用于检查节气门控制计算机的操作并由发动机控制计算机执行作为定时器中断程序。 看门狗定时器被连接到发动机控制计算机,以响应在执行监视程序期间产生的看门狗脉冲来检测监视程序的故障。 在检测到监视程序的故障时,看门狗定时器禁止由节气门控制计算机进行的电子节气门控制。 同时,将发动机控制模式从正常的发动机控制改变为发动机功率降低控制,从而确保发动机的跛行回家操作。