Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – With indicator or control of power plant
Reexamination Certificate
2005-09-29
2010-02-02
Kwon, John T (Department: 3747)
Data processing: vehicles, navigation, and relative location
Vehicle control, guidance, operation, or indication
With indicator or control of power plant
C123S435000, C123S406230
Reexamination Certificate
active
07657359
ABSTRACT:
Work done by an engine can be accurately calculated regardless of the part in an observation section where the cylinder internal pressure signal is detected. The apparatus for calculating the work done by an engine establishes in advance correlation of phase between the cylinder internal pressure of the engine and a reference signal composed of a predetermined frequency component as a reference phase relation. A means for detecting the cylinder internal pressure of the engine for a predetermined observation section is provided. A reference signal corresponding to the detected cylinder internal pressure of the engine is calculated so that the reference phase relation is satisfied. A correlation coefficient of the detected cylinder internal pressure of the engine and the calculated reference signal is calculated for the observation section and the work done by the engine is calculated in accordance with the correlation coefficient.
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Keiichi Nagashima et al., “New Indicated Mean Effective Pressure Measuring Method and Its Applications”, In: SAE Trans (Soc. Automot. Eng.), 2002, pp. 2982-2987, vol. 111 sec. 3.
Okubo Katsura
Sato Masahiro
Shinozaki Koichiro
Yasui Yuji
Arent & Fox LLP
Honda Motor Co. Ltd.
Kwon John T
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