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发明授权
US4525781A Method of determining fluctuations in indicated mean effective pressure of engine and apparatus therefor 失效
确定发动机及其设备的平均有效压力波动的方法

Method of determining fluctuations in indicated mean effective pressure of engine and apparatus therefor
摘要：
A method of and an apparatus for measuring fluctuations in the indicated mean effective pressure of an engine from a deviation of the mean pressure or from an unbiased variance (mean square) of the mean pressure obtained from the deviation in the mean pressure by utilizing a deviation of the mean pressure becomes substantially identical with a deviation of the indicated mean effective pressure or an unbiased variance (mean square) of this mean pressure becomes substantially identical with an unbiased variance (mean square) of the indicated mean effective pressure in a cylinder of the engine. This deviation of the mean pressure is calculated from detected changes in the rotational speed of the engine.
摘要（中）：

根据平均压力的偏差或平均压力偏差的平均偏差的偏差（均方根），通过利用偏差来测量发动机指示的平均有效压力的波动的方法和装置， 平均压力的平均压力的变化基本上与所指示的平均有效压力的偏差或该平均压力的无偏差方差（均方根）变得基本相同，该平均压力与所述平均压力的圆柱体中的所示平均有效压力的无偏差方差 发动机。 根据检测到的发动机转速的变化计算平均压力的这种偏差。

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