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    • 2. 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。
    • 4. 发明授权
    • Speed-dependent air intake system and method for internal combustion
engines
    • 用于内燃机的速度依赖的进气系统和方法
    • US5347966A
    • 1994-09-20
    • US81944
    • 1993-06-25
    • Jeff A. MahonRoss C. Berryhill
    • Jeff A. MahonRoss C. Berryhill
    • F02M31/135F02B3/06F02M31/12F02N19/06F02N17/02
    • F02N19/06F02B2275/14F02B3/06
    • An air intake heating system and method for use in a diesel engine having a battery and alternator is provided for minimizing white smoke emissions without excessively depleting the engine battery at low engine speeds wherein the battery and not the alternator is the principal contributor of power to the air intake heater. The system generally comprises an electrically powered heater assembly for heating the intake air of the engine, a power regulation circuit electrically connected between the battery and the alternator of the engine and the heater assembly, a rotational speed sensor and a temperature sensor, and a CPU connected to the output of the speed and temperature sensors and the power regulation circuit for admitting a first, relatively low level of power to the heater assembly at low engine speeds where the battery is the primary source of power for the assembly, and a second, higher level of power when the engine speed is high enough so that the alternator becomes the principal contributor of power to the heater assembly.
    • 提供一种用于具有电池和交流发电机的柴油发动机的进气加热系统和方法,用于使白烟排放最小化,而不会在低发动机转速下过度耗尽发动机电池,其中电池而不是交流发电机是对 进气加热器 该系统通常包括用于加热发动机的进气的电动加热器组件,电连接在电池和发动机和加热器组件的交流发电机之间的功率调节电路,转速传感器和温度传感器,以及CPU 连接到速度和温度传感器的输出端和功率调节电路,用于在电池是用于组件的主要电源的低发动机速度下允许第一相对较低水平的功率加热器组件;以及第二, 当发动机速度足够高时,更高水平的功率使得交流发电机成为加热器组件的电力的主要贡献者。