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. 02, 2011
Filed:
Feb. 13, 2009
Koji Kawakita, Ohbu, JP;
Katsunori Ueda, Okazaki, JP;
Toshiyuki Miyata, Okazaki, JP;
Hiroki Yamamoto, Nagoya, JP;
Koji Kawakita, Ohbu, JP;
Katsunori Ueda, Okazaki, JP;
Toshiyuki Miyata, Okazaki, JP;
Hiroki Yamamoto, Nagoya, JP;
Mitsubishi Jidosha Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
A controller of an internal combustion engine includes: a purge controller, operable to control a purge amount of the vaporized fuel purged to an air intake system; an exhaust air-fuel ratio detector; an air-fuel ratio feedback controller; a period determiner, operable to determine whether it is an estimation enabling period; and an alcohol concentration estimator, operable to estimate the alcohol concentration. When the purge of the vaporized fuel is cut during the estimation enabling period, the purge controller: performs control so that the purge is cut with a large degree of tailing, in an operation region where a load of the internal combustion engine is high and a rotation speed is high; and performs control so that the purge is cut with a smaller degree of tailing than the large degree of tailing, in an operation region where the load of the internal combustion engine is low and the rotation speed is low.