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. 27, 1998
Filed:
Sep. 18, 1996
Applicant:
Inventors:
Hiromichi Yanagihara, Gotenba, JP;
Kiyoshi Kobashi, Mishima, JP;
Assignee:
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F01N / ;
U.S. Cl.
CPC ...
60276 ; 60278 ; 60297 ; 60301 ; 123569 ;
Abstract
A compression ignition type engine comprising an NO.sub.x arranged in its exhaust passage. This NO.sub.x absorbent absorbs NO.sub.x when the air-fuel ratio of the inflowing exhaust gas is lean and releases the absorbed NO.sub.x when the air-fuel ratio of the exhaust gas is rich. When NO.sub.x should be released from the NO.sub.x absorbent, the mean value of the air-fuel ratio in the combustion chamber is changed from lean to rich. At least at this time, use is made of fuel containing oxygen as the injected fuel.