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:
Oct. 17, 2006
Filed:
Oct. 20, 2003
Shinji Nakagawa, Tokyo, JP;
Minoru Ohsuga, Tokyo, JP;
Mamoru Nemoto, Tokyo, JP;
Kosaku Shimada, Tokyo, JP;
Toshio Hori, Tokyo, JP;
Shinji Nakagawa, Tokyo, JP;
Minoru Ohsuga, Tokyo, JP;
Mamoru Nemoto, Tokyo, JP;
Kosaku Shimada, Tokyo, JP;
Toshio Hori, Tokyo, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
In a lean-burn engine equipped, in the exhaust pipe, with NOx trap catalyst that collects NOx by absorption or occlusion, the rich spike start timing and rich spike volume are optimized. The above subject is achieved by an engine control system equipped, in the downstream side of the NOx trap catalyst, with a NOx sensor that detects the NOx component in the exhaust, NOx trap catalyst model, and a device that controls the engine operating condition based on the outputs of the NOx trap catalyst model and NOx sensor.