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:
May. 10, 2005
Filed:
Mar. 05, 2003
Thorsten Fritz, Gaggenau, DE;
Dieter Lederer, Ludwigsburg, DE;
Karl-bernhard Lederle, Renningen, DE;
Thorsten Fritz, Gaggenau, DE;
Dieter Lederer, Ludwigsburg, DE;
Karl-Bernhard Lederle, Renningen, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
A method checks the operability of a tank-venting system for a motor vehicle having an internal combustion engine. The tank-venting system includes a fuel tank (), an adsorption filter () and a filter line () connecting the adsorption filter to the fuel tank. The adsorption filter () has a venting line () and a switchover/check valve () is provided for closing off the venting line (). The system includes a tank-venting valve () and a valve line () connecting the tank-venting valve to the adsorption filter. In the method, an overpressure relative to atmospheric pressure is introduced into the tank-venting system utilizing a drivable pressure source (). An operating characteristic variable of the pressure source is detected while introducing the overpressure to determine the pressure course. A conclusion is drawn as to the presence of a leak from the pressure course. The overpressure is reduced by opening the tank-venting valve () and simultaneously closing said switchover/check valve ().