The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 30, 2011
Filed:
Dec. 04, 2008
Applicants:
Tatsuya Naito, Nagano, JP;
Kenichi Ishii, Nagano, JP;
Shigemi Miyazawa, Nagano, JP;
Ryuu Saitou, Nagano, JP;
Inventors:
Tatsuya Naito, Nagano, JP;
Kenichi Ishii, Nagano, JP;
Shigemi Miyazawa, Nagano, JP;
Ryuu Saitou, Nagano, JP;
Assignee:
Fuji Electric Co., Ltd., , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F02P 1/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A coil failure detection circuit detects a rise of a collector current of an IGBT and a timer circuit measures the length of a rise period. If the rise is not a normal one, an electronic control unit judges that a coil failure has occurred. The electronic control unit turns off the IGBT to prevent misfires and stops a flow of fuel gas to a combustion chamber to prevent melting or deterioration of a catalyst.