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:
Mar. 27, 2012
Filed:
Jan. 16, 2009
Ryoichi Oura, Hitachinaka, JP;
Mitsuhiko Watanabe, Odawara, JP;
Takuya Mayuzumi, Hitachinaka, JP;
Kaneyuki Okamoto, Hitachinaka, JP;
Ryoichi Oura, Hitachinaka, JP;
Mitsuhiko Watanabe, Odawara, JP;
Takuya Mayuzumi, Hitachinaka, JP;
Kaneyuki Okamoto, Hitachinaka, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
An internal combustion engine controller comprises a current or voltage source for controlling a potential at a diagnosis position in order to ensure a high-precision fault diagnosis, even if the drive cycle of the electromagnetic load (such as a fuel injector), in the internal combustion engine is shorted. Diagnosis timing is optimally set or the number of determinations for averaging is increased in order to ensure high-precision fault diagnosis without being influenced by unexpected disturbance such as noises. In fault diagnosis of a regeneration circuit into a booster circuit, either an input/output voltage or the regeneration current of a driver of the electromagnetic load is detected.