发明名称 COMBUSTION STATE DETECTOR
摘要 PROBLEM TO BE SOLVED: To correctly detect the change of the quantity of the combustion ion generated in a combustion chamber of an internal combustion engine in a combustion state detector. SOLUTION: In the configuration in which the AC voltage is applied via a transformer 21 to a pair of electrodes 11 and 12 facing each other provided in the combustion chamber of the internal combustion engine, and the combustion ion present between the electrodes 11 and 12 facing each other is detected based on the current signal according to the magnitude of the current running in the electrodes 11 and 12, a low pass filter 24 to eliminate the current composition of higher order of the frequency of the AC voltage is provided on the primary side of the transformer 21 to keep the voltage applied between the electrodes 11 and 12 to be close to that of the sinusoidal wave. The effect on the detection accuracy of the combustion ion due to the variance of the capacity current composition running in the electrodes 11 and 12 as the capacity element attributable to the distortion of the waveform of the applied AC voltage is reduced.
申请公布号 JP2003120494(A) 申请公布日期 2003.04.23
申请号 JP20010321749 申请日期 2001.10.19
申请人 NIPPON SOKEN INC;DENSO CORP 发明人 YORITA HIROSHI;TORIYAMA MAKOTO;YOSHINAGA TORU
分类号 G01M15/04;F02D45/00;F02P17/12;G01N27/62;(IPC1-7):F02P17/12;G01M15/00 主分类号 G01M15/04
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