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. 05, 1977
Filed:
Oct. 18, 1974
Applicant:
Inventors:
Kenji Masaki, Yokohama, JA;
Hidehiro Minami, Yokohama, JA;
Assignee:
Nissan Motor Co., Ltd., Yokohama, JA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F02B / ;
U.S. Cl.
CPC ...
60274 ; 60282 ; 60285 ; 60289 ;
Abstract
One-half of combustion chambers is fed with a lean air-fuel mixture the ratio of which is above the ratio at which maximum quantities of NO.sub.x are formed and the other half with a rich mixture the ratio of which is below the ratio at which maximum quantities of NO.sub.x are formed, the rich mixture ratio depending on vehicle speed. Above a predetermined load all chambers are fed with a richer-than-stoichiometric mixture and air may be added to the exhaust.