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    • 3. 发明授权
    • Apparatus and method for analyzing events for an internal combustion
engine
    • 用于分析内燃机事件的装置和方法
    • US5359883A
    • 1994-11-01
    • US106725
    • 1993-08-16
    • Darryl D. BaldwinTien D. Doan
    • Darryl D. BaldwinTien D. Doan
    • F02D35/02G01M15/08G01L23/00
    • F02D35/028F02D35/023G01M15/08
    • In one aspect of the present invention, an apparatus for analyzing a plurality of events of an internal combustion engine is provided. A crankshaft sensor monitors the rotational position of the crankshaft and responsively produces a crankshaft pulsetrain. A cylinder pressure sensor senses the pressure produced in the engine cylinder and responsively produces a cylinder pressure signal. A memory device stores previously calculated values representing engine cylinder volumes at predetermined crankshaft positions. A microprocessor determines the start of combustion for an occurring engine cycle in response to a cylinder pressure signal magnitude, P.sub.2, at a current crankshaft position being equal or greater than the relationship:P.sub.1 (V.sub.1 /V.sub.2).sup.nwhere, P.sub.1 equals the cylinder pressure corresponding to a previous crankshaft position, V.sub.1 equals cylinder volume corresponding to the previous crankshaft position, V.sub.2 equals the cylinder volume corresponding to the current crankshaft position, and n equals a predetermined polytropic value. Advantageously, the start of combustion is determined prior to the next occurring engine cycle.
    • 在本发明的一个方面,提供一种用于分析内燃机的多个事件的装置。 曲轴传感器监测曲轴的旋转位置并且响应地产生曲轴脉冲串。 气缸压力传感器感测发动机气缸中产生的压力,并且响应地产生气缸压力信号。 存储装置将先前计算的表示发动机气缸体积的值存储在预定的曲轴位置。 微处理器响应于当前曲轴位置处的气缸压力信号幅度P2等于或大于P1(V1 / V2)n,其中P1等于气缸压力,确定发生的发动机循环的燃烧开始 对应于之前的曲轴位置,V1等于对应于先前曲轴位置的气缸体积,V2等于对应于当前曲轴位置的气缸体积,n等于预定的多变性值。 有利地,在下一次发生的发动机循环之前确定燃烧开始。