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:
Feb. 02, 2010
Filed:
Sep. 13, 2007
Malfunction diagnostic apparatus and malfunction diagnostic method for combustion improvement device
Koichi Hoshi, Susono, JP;
Shogo Suda, Susono, JP;
Makoto Tomimatsu, Susono, JP;
Nobuhiko Koga, Susono, JP;
Yuuichi Kato, Susono, JP;
Koichi Hoshi, Susono, JP;
Shogo Suda, Susono, JP;
Makoto Tomimatsu, Susono, JP;
Nobuhiko Koga, Susono, JP;
Yuuichi Kato, Susono, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, JP;
Abstract
A malfunction diagnostic apparatus for a combustion improvement device that is disposed in an intake passage connected to each of combustion chambers in an internal combustion engine to improve a combustion state, includes a detector that detects an average crank angular acceleration or a correlated value correlated with the average crank angular acceleration in each of cylinders in the internal combustion engine; an operating state detector that detects a current operating state of the combustion improvement device; and a malfunction determination device that determines whether a malfunction occurs in the combustion improvement device for each of the cylinders, based on the average crank angular acceleration or the correlated value and the current operating state of the combustion improvement device.