Method and apparatus to determine instantaneous engine power...

Details Method and apparatus to determine instantaneous engine power... Method and apparatus to determine instantaneous engine power...

2007-04-19

2009-02-17

Wolfe, Jr., Willis R. (Department: 3747)

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

With indicator or control of power plant

C701S054000, C701S115000

Reexamination Certificate

active

07493206

ABSTRACT:
There is provided a method and an article of manufacture comprising a storage medium having machine-executable code stored therein for estimating a power loss for an internal combustion engine at a point in time. The code includes code to determine engine operating conditions. A nominal power loss is determined based upon an engine operating point. A power loss correction to the nominal power loss is determined based upon barometric pressure, engine temperature, air/fuel ratio, and catalyst temperature. The power loss correction is determinable for: an engine air/fuel ratio mode, an engine cylinder activation mode, and, an engine operating temperature mode.

REFERENCES:
patent: 4719025 (1988-01-01), Akiyama et al.
patent: 6416437 (2002-07-01), Jung
patent: 6959241 (2005-10-01), Itow et al.

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