In-cylinder pressure detecting apparatus

Details In-cylinder pressure detecting apparatus In-cylinder pressure detecting apparatus

2006-10-10

2006-10-10

Lefkowitz, Edward (Department: 2855)

Measuring and testing

Vehicle drive train

Rear end

C073S116070, C073S117020, C073S117020, C073S118040

Reexamination Certificate

active

07117725

ABSTRACT:
An apparatus for detecting an in-cylinder pressure of an engine is provided. The apparatus comprises an in-cylinder pressure sensor for outputting a signal indicating a change rate of an in-cylinder pressure and a control unit. The control unit is configured to correct the signal from the in-cylinder pressure sensor, integrate the corrected signal to determine the in-cylinder pressure, determine a change rate of a drift contained in the determined in-cylinder, and feedback the change rate of the drift so that the correction of the signal is made with the change rate of the drift. Since the output of the in-cylinder pressure sensor from which a drift has been removed is integrated, it is prevented that a drift appears in the in-cylinder pressure obtained by the integral. A resetting operation is not required so as to remove a drift.

REFERENCES:
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