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:
Dec. 25, 2007
Filed:
Feb. 10, 2005
Hiroshi Yoshioka, Tokyo, JP;
Tateki Mitani, Tokyo, JP;
Hiroshi Yoshioka, Tokyo, JP;
Tateki Mitani, Tokyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A leak detecting system for a transpiration purge system including a fuel tankand a canisterincludes a jet pump, which leads the atmosphere into the fuel tankusing a return flow of excess fuel of fuel pumped to an internal combustion engine, internal pressure measuring means, and fuel volume detecting means. After intaking air via pressurizing means for a predetermined time, the leak detecting system judges that a leak is present when a holding pressure measurement value in a state in which the transpiration purge system is closed is lower than a decompression calculation value calculated from a pressurization measurement value, an air volume, and a leak hole diameter.