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. 08, 2014
Filed:
Sep. 28, 2011
Paul D. Perry, Chatham, CA;
Paul D. Perry, Chatham, CA;
Continental Automotive Systems, Inc., Auburn Hills, MI (US);
Abstract
A vapor management system () includes a fuel tank (), a canister (), a pressure control valve () between the tank and canister and defining a high pressure side () and a low pressure side (), a vacuum source (), a purge valve () between the canister and vacuum source, a leak detection valve () connected with the canister and including a processor (). A pressure sensor () and a temperature sensor () are disposed in a fuel vapor cavity of the fuel tank, with signals from the sensors being received by the processor. Based on an absolute temperature measured by the temperature sensor, the processor compares a predicted pressure in the fuel tank to the measured absolute pressure, and identifies a leak on the high pressure side if the predicted pressure is outside a tolerance range, while maintaining pressure in the fuel tank.