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:
Jan. 11, 2000
Filed:
Jul. 31, 1997
Applicant:
Inventors:
Assignee:
Nissan Motor Co., Ltd., Kanagawa, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F02M / ;
U.S. Cl.
CPC ...
123519 ; 123698 ;
Abstract
In an engine comprising a fuel vapor purge mechanism which mixes fuel vapor from a fuel tank with the intake air of the engine after fuel vapor has been adsorbed by a canister, a uniform fuel-air mixture and a stratified fuel-air mixture are selectively produced. When the engine is running with a stratified fuel-air mixture, purge of fuel vapor is prohibited. On the other hand, when the fuel vapor adsorption amount in the canister has reached a predetermined value, the engine is forcibly run with a uniform fuel-air mixture and purge of fuel vapor is performed, In this way, the fuel vapor adsorption amount in the canister is prevented from becoming excessive.