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. 25, 2000
Filed:
Mar. 27, 1998
Applicant:
Inventors:
Akihiro Kawano, Kanagawa, JP;
Shinsuke Nakazawa, Kanagawa, JP;
Assignee:
Nissan Motor Co., Ltd., Yokohama, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F02M / ;
U.S. Cl.
CPC ...
123520 ; 1231 / ;
Abstract
In a leak test system for a vaporized fuel treatment device of a vehicle using negative pressure, a pressure variation rate in a test flowpath is measured in a predetermined time interval, and a reference value which is larger than the minimum variation rate measured is set in a predetermined time interval. Sloshing in a fuel tank is determined by comparing a latest variation rate with the reference value on each occasion. In this way, sloshing can be detected with high precision at any stage of leak testing, and the leak test is stopped when sloshing is detected.