Combustion control in an internal combustion engine

Details Combustion control in an internal combustion engine Combustion control in an internal combustion engine

2006-12-20

2008-11-18

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

C701S102000, C073S114160, C123S435000

Reexamination Certificate

active

07454286

ABSTRACT:
The present invention relates to: self-tuning engine control algorithms using inputs from transducers that measure pressure in the engine cylinders, and from an engine crankshaft rotational position sensor; methods of processing the input signals to “self-tune” or learn accurate values for a) pressure transducer voltage offset, b) crank position encoder error and c) engine compression ratio; improved pressure-ratio-based algorithms for calculating cylinder heat release fraction as a function of crank angle.

REFERENCES:
patent: 5806490 (1998-09-01), Nogi et al.
patent: 5931140 (1999-08-01), Maloney
patent: 6785604 (2004-08-01), Jacobson
patent: 7143580 (2006-12-01), Ge
patent: 7195007 (2007-03-01), Muto et al.
patent: 7207316 (2007-04-01), Moriya et al.
patent: 7363911 (2008-04-01), Brehob

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