Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Yasuo Hirata0
Eijirou Yamada0
Tetsuji Mitsuda0
Yasuo Sagisaka0
Date of Patent
September 21, 2010
0Patent Application Number
121530640
Date Filed
May 13, 2008
0Patent Citations Received
Patent Primary Examiner
Patent abstract
In a multi-cylinder engine, to compute the air-fuel ratio of each cylinder by an air-fuel ratio sensor disposed in an exhaust pipe, a cylinder is determined by a crank angle detected by a crank angle sensor. A deviation in the air-fuel ratio of each cylinder is detected on the basis of the output signal of the air-fuel ratio sensor disposed in the exhaust pipe and the forcibly changed quantity of the air-fuel ratio.
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