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. 12, 1999
Filed:
Jul. 15, 1997
Susumu Shinohara, Toyota, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
An apparatus for testing seal of a fuel vapor treating device that collects fuel vapor generated in a fuel tank and treats the vapor without releasing it into the atmosphere. The treating device is provided with a canister that collects the fuel vapor through a vapor line. A vapor control valve connected to the canister adjusts the flow of fuel vapor directed toward the canister from the tank. A pressure sensor is provide to detect the pressure in the tank. An electronic control unit (ECU) controls the purge control valve and the three-way valve. The ECU counts the number of deviations of the detected pressure when the detected pressure is within a predetermined range. The ECU determines whether the seal is normal or malfunctioning based on the detected pressure when the counted value is smaller than a predetermined value.