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:
Jul. 19, 2011
Filed:
Mar. 09, 2009
Andreas Menke, Weingarten, DE;
Andreas Menke, Weingarten, DE;
Abstract
A tank ventilation system for a motor vehicle includes a tank () for combustible fuels. An activated carbon filter () is connected to the tank () via a connecting line () and adsorbs hydrocarbon vapors of the tank () for deaeration. An electrically activatable check valve () is in the connecting line. A differential pressure sensor () measures the pressure difference between the vapor chamber () of the tank () and the environment. The connecting line is formed without a vacuum valve. A mechanical vacuum valve () is provided for tank aeration with respect to the environment. The check valve is closed if the pressure difference measured by the differential pressure sensor is below a fixed, positive threshold value, and is open if the pressure difference is above the threshold value.