Equivalent IMEP Measuring Method Using Prototype Combustion Monitor Sensor

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  • 試作燃焼モニタセンサによる等価図示平均有効圧の計測
  • シサク ネンショウ モニタセンサ ニ ヨル トウカ ズシ ヘイキン ユウコウアツ ノ ケイソク

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The prototype piezoelectric sensor to fit up the outside of engine was manufactured for measuring equivalent indicated mean effective pressure (Equivalent IMEP). Equivalent IMEP is correlative with indicated mean effective pressure (IMEP) got from ordinary cylinder pressure diagram. The insulation resistance at 150 degrees was 1 G ohms over, and the sensitivity was 1 V/MPa over when feedback capacitance was 1000 pF. The prototype sensor mounted a single cylinder engine and measured equivalent IMEP, the correlation coefficient of IMEP between equivalent IMEP was about 0.99.

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