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. 09, 2002
Filed:
Aug. 07, 2000
Applicant:
Inventors:
Masaya Furusho, Yokohama, JP;
Katsunori Ozaki, Ishihara, JP;
Assignee:
Nissan Motor Co., Ltd., Kanagawa, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F02N 3/302 ; F02N 2/508 ;
U.S. Cl.
CPC ...
F02N 3/302 ; F02N 2/508 ;
Abstract
A leak diagnostic device is provided to detect leaks at any parts of an in-tank canister system. The three-way control valve may be switched while the purge control valve remaining open to negatively pressurize the interior of the fuel tank while the interior of the canister being maintained at about atmospheric pressure. Upon negatively pressurizing the interior of the fuel tank the purge control valve is closed, and then leaks are checked based on a change in the negative pressure within the fuel tank