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:
Sep. 06, 1983
Filed:
Mar. 13, 1979
Applicant:
Inventor:
Shigeo Aono, Tokyo, JP;
Assignee:
Nissan Motor Company, Ltd., Yokohama, JP;
Primary Examiner:
Int. Cl.
CPC ...
F02B / ; F02M / ;
U.S. Cl.
CPC ...
123440 ; 123489 ; 60285 ; 60276 ;
Abstract
Emission control apparatus for a multi-cylinder internal combustion engine has an exhaust composition sensor disposed in a passage in common to the exhaust systems of the engine. The sensed concentration of the exhaust composition is modulated in amplitude by a bipolar pulsating signal at a frequency higher than the frequency of the sensed exhaust concentration. A statistical analysis indicates distribution of the ratios within a narrow stoichiometric window.