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. 15, 2012
Filed:
Apr. 02, 2008
Siegfried Meixner, Hitzhofen, DE;
Siegfried Meixner, Hitzhofen, DE;
Audi AG, Ingolstadt, DE;
Abstract
The invention relates to a method for testing the mobility of the negative pressure relief valve of the fuel system of a motor vehicle, the negative pressure relief valve depending on the pressure within the fuel system having to be moved between a closed position which closes the fuel system and an open position which clears the fuel system, with the following steps: a) Testing the position of the negative pressure relief valve; and b) Testing the position of the negative pressure relief valve in reaction to a pressure increase within the fuel system if the negative pressure relief valve in step a) was in the closed position. The invention furthermore relates to a system for testing the mobility of the negative pressure relief valve of the fuel system of a motor vehicle.