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    • 1. 发明授权
    • Rotational speed control system for internal combustion engine
    • 内燃机转速控制系统
    • US5253626A
    • 1993-10-19
    • US958558
    • 1992-10-06
    • Yasukazu HatanoHidetoshi SuzukiSatoshi Hitomi
    • Yasukazu HatanoHidetoshi SuzukiSatoshi Hitomi
    • F02D31/00F02D41/16F02D41/14
    • F02D41/16F02D31/008
    • A rotational speed control system for an internal combustion engine capable of preventing a dead time or dead section from occurring in controlling of a rotational speed of the engine. An integrating circuit is controlled by means of an output of a comparator for comparing a rotational speed detection signal with a target rotational speed setting signal, to thereby obtain an integral voltage which falls and rises when the rotational speed detection signal is above and below the target rotational speed setting signal, respectively. Comparison of the integral voltage with a sawtooth signal voltage leads to a pulse signal subjected to pulse width modulation. The pulse signal is fed to an actuator driving circuit to carry out on-off controlling of a drive current for the actuator. Connection of voltage limiting circuits to the integrating circuit causes a variation of the integral voltage to be limited within a range of amplitude of the integral voltage, to thereby eliminate the dead time or dead section.
    • 一种用于内燃机的转速控制系统,其能够防止在控制发动机的转速时发生死区时间或死区。 通过比较器的输出来控制积分电路,用于将转速检测信号与目标转速设定信号进行比较,从而获得当转速检测信号在目标上方和下方时下降的积分电压 转速设定信号。 积分电压与锯齿波信号电压的比较导致经脉冲宽度调制的脉冲信号。 将脉冲信号馈送到致动器驱动电路,以对致动器的驱动电流进行开关控制。 将电压限制电路连接到积分电路会使积分电压的变化被限制在积分电压幅度的范围内,从而消除死区时间或死区。