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:
Nov. 13, 2001
Filed:
Apr. 07, 2000
Applicant:
Inventor:
Masayuki Wakui, Saitama, JP;
Assignee:
Honda Giken Kogyo Kabushiki Kaisha, Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F01N 3/00 ;
U.S. Cl.
CPC ...
F01N 3/00 ;
Abstract
In an engine,the phase of an intake camshaft,and/or an exhaust camshaft,for opening and closing intake valves,and/or exhaust valves,can be changed relative to a crankshaft,and NOx produced during lean-burn operation is occluded by a NOx occlusion catalyst,An ECU,of a control device,increases the amount of fuel such that an air-fuel ratio A/F used during the lean-burn operation is enriched by an enrichment amount R,to thereby purge the NOx occlusion catalyst of NOx occluded therein and controls to change the phase CAIN of the intake camshaft,towards the advance side relative to the crankshaft