发明名称 |
COMBUSTION STATE DETECTING DEVICE FOR INTERNAL COMBUSTION ENGINE |
摘要 |
PROBLEM TO BE SOLVED: To avoid the influence of attenuation of output of an integration circuit caused due to discharge of a capacitor, in a combustion state detecting device wherein a signal processing circuit integrates an output value of a sensor corresponding to change speed of pressure in a combustion chamber with the capacitor and the pressure in the combustion chamber is obtained based thereon. SOLUTION: In an ECU 3 receiving an output signal of the signal processing circuit 2, a multiplier value obtained by multiplying a previous sampling value by a coefficient is subtracted from a current sampling value of the output signal, and processing for defining this value as change quantity of the pressure in the combustion chamber is executed so as to obtain the change quantity in the combustion chamber without being influenced by the attenuation. COPYRIGHT: (C)2005,JPO&NCIPI
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申请公布号 |
JP2005139902(A) |
申请公布日期 |
2005.06.02 |
申请号 |
JP20030373879 |
申请日期 |
2003.11.04 |
申请人 |
NIPPON SOKEN INC;DENSO CORP |
发明人 |
YORITA HIROSHI;TORIYAMA MAKOTO |
分类号 |
G01L23/10;F02D45/00;(IPC1-7):F02D45/00 |
主分类号 |
G01L23/10 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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