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:
Jul. 24, 2007
Filed:
Apr. 30, 2003
Shinji Nakagawa, Hitachinaka, JP;
Toshio Hori, Hitachinaka, JP;
Mamoru Nemoto, Hitachinaka, JP;
Masami Nagano, Hitachinaka, JP;
Shinji Nakagawa, Hitachinaka, JP;
Toshio Hori, Hitachinaka, JP;
Mamoru Nemoto, Hitachinaka, JP;
Masami Nagano, Hitachinaka, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
An internal combustion engine control device for, in a lean-burn internal combustion engine provided with a three-way catalyst and a lean NOx catalyst in an exhaust system, optimizing an air/fuel ratio in a rich mode from the viewpoints of both better fuel economy and exhaust emission control when NOx having been stored in a lean NOx catalyst during a lean operation is desorbed and cleaned by switching to a rich operation. An internal combustion engine control device for controlling an air/fuel ratio during the rich operation to be changed between a period of desorbing Ostored in the three-way catalyst and a period of desorbing and cleaning NOx stored in the lean NOx catalyst.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile