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:
Apr. 20, 1999
Filed:
Oct. 27, 1997
Applicant:
Inventor:
Gaetan Monnier, Rueil-Malmaison, FR;
Assignee:
Institute Francais du Petrole, Rueil-Malmaison, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F01N / ; F02M / ;
U.S. Cl.
CPC ...
60274 ; 60278 ; 123443 ; 123568 ;
Abstract
The present invention is a process for controlling the intake of a direct fuel injection four-stroke engine in at least two combustion chambers. A diferent intake for at least two cylinders or groups of cylinders is used in order to reduce exhaust emissions. A first cylinder or group of cylinders is operated with an air/fuel ratio greater than or equal to one, and a second cylinder or group of cylinders (21, 24) is operated in under-stoichiometric conditions.