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. 24, 2006
Filed:
Nov. 05, 2003
Takuji Matsubara, Yokosuka, JP;
Toru Kidokoro, Torrance, CA (US);
Yoshihiko Hyodo, Gotemba, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
A sealing valvethat controls a communication state between a fuel tankand a canisteris provided. During stop of an internal combustion engine, the sealing valveis generally closed, and the canisteris opened to the atmosphere. The sealing valveis opened when the internal combustion engine is stopped, and differential pressure exceeding a valve opening determination value is generated between tank internal pressure and atmospheric pressure. A change in the tank internal pressure generated between before and after the sealing valveis opened is detected. When the change in the tank internal pressure is below a predetermined determination value, closing failure of the sealing valve is determined.