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    • 1. 发明授权
    • Exhaust gas recirculation control system
    • 废气再循环控制系统
    • US5533489A
    • 1996-07-09
    • US413374
    • 1995-03-30
    • Vincent P. SocciRoss C. BerryhillEric K. BradleyCharles R. Schenk
    • Vincent P. SocciRoss C. BerryhillEric K. BradleyCharles R. Schenk
    • F02M25/07F02B3/06F02D11/10F02D21/08F02D41/00F02D41/02F02D45/00H03K5/08
    • F02D41/005F02B3/06F02D11/106F02D2041/0017F02D2041/1432Y02T10/47
    • A control system for controlling exhaust gas recirculation in an internal combustion engine. The output of a throttle position sensor is used as an input to two parallel filters. The first filter is a lag-lead compensated filter which functions as a differentiator, producing an output proportional to the instantaneous rate of change of the throttle position.. The second filter is a fixed-rate tracking filter which generates a tracking signal that tracks the input signal. The tracking signal, however, cannot vary by more than a maximum predetermined rate. The output of the second filter is the difference between the input signal and the tracking signal. The outputs of the two filters are summed and applied to a hysteretic comparator, which turns the EGR valve off when the sum exceeds an upper threshold and turns the EGR valve back on when the sum has decayed below a lower threshold. As a result, the first filter output is largely responsible for triggering the EGR valve to turn off, while the second filter output is largely responsible for determining how long the EGR valve remains off.
    • 一种用于控制内燃机中废气再循环的控制系统。 节气门位置传感器的输出用作两个并联滤波器的输入。 第一个滤波器是一个滞后引线补偿滤波器,用作微分器,产生与节流阀位置的瞬时变化率成比例的输出。第二个滤波器是一个固定速率跟踪滤波器,产生跟踪信号的跟踪信号 输入信号。 然而,跟踪信号不能变化超过最大预定速率。 第二滤波器的输出是输入信号和跟踪信号之间的差值。 两个滤波器的输出相加并且应用于迟滞比较器,当比值超过上阈值时,关闭EGR阀,当总和衰减到低于阈值以下时,EGR阀再次打开。 因此,第一个过滤器输出主要负责触发EGR阀关闭,而第二个过滤器输出主要负责确定EGR阀保持关闭的时间。
    • 5. 发明授权
    • Closed-loop actuator control system having bumpless gain and anti-windup logic
    • 闭环执行器控制系统具有无扰动增益和防饱和逻辑
    • US06424906B1
    • 2002-07-23
    • US09774425
    • 2001-01-31
    • G. George ZhuMark W. PyclikEric K. BradleyLarry J. Brackney
    • G. George ZhuMark W. PyclikEric K. BradleyLarry J. Brackney
    • F02D4304
    • F02D35/0007F02D41/1401F02D43/00F02D2041/1409F02D2041/141F02D2041/1418
    • A closed-loop actuator control system includes a single PI controller for controlling one or more actuators to minimize an error between an engine operating parameter value and a reference parameter value. In multiple actuator systems, the control system of the present invention is operable to drive one actuator to its upper limit before transferring control to the next actuator. The proportional gain block of the PI controller preferably includes a bumpless gain feature operable to limit the rate of change of the proportional gain to thereby provide smooth gain scheduling. A feedforward block may optionally be included that preferably includes the bumpless gain feature. The actuator control system further includes anti-windup logic operable to disable the PI integrator if the actuator drive signal is upper or lower limit bounded and the error signal is greater or less than zero respectively, thereby creating dynamic saturation of the PI integrator.
    • 闭环致动器控制系统包括单个PI控制器,用于控制一个或多个致动器以最小化发动机操作参数值和参考参数值之间的误差。 在多个致动器系统中,本发明的控制系统可操作以在将控制转移到下一个致动器之前将一个致动器驱动到其上限。 PI控制器的比例增益块优选地包括无扰动增益特征,其可操作以限制比例增益的变化率,从而提供平滑的增益调度。 可以可选地包括前馈块,其优选地包括无扰动增益特征。 致动器控制系统还包括防起搏逻辑,如果致动器驱动信号是上限或下限,并且误差信号分别大于或小于零,则可以使PI积分器无效,从而产生PI积分器的动态饱和。