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https://drivepatents.com/patents/952443 · 4 Feb 2015
The present invention relates to a method and an apparatus for estimating an alcohol concentration in an alcohol fuel mixture supplied to an internal combustion engine, wherein the operation of the internal combustion engine supplied with the alcohol fuel ...
https://drivepatents.com/patents/1112240 · 20 Jun 2001
A method for estimating the stoichiometric ratio of fuel for a control system of an internal combustion engine including an oxygen sensor (4, 26) disposed along an exhaust duct (6) and supplying a composition signal (V lambda ) and a control unit (5, 27) w...