Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
September 21, 2010
Patent Application Number
11584508
Date Filed
October 23, 2006
Patent Primary Examiner
Patent abstract
An ion current corresponding to an amount of ion produced by combustion of air fuel mixture in a combustion chamber of an internal combustion engine is detected and an ion current parameter indicative of combustion state is calculated from the ion current. The properties of fuel are determined by a change of combustion state from an engine start time, that is, by a change of the ion current parameter.
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