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:
Mar. 24, 2020
Filed:
Sep. 14, 2017
Dr. Ing. H.c. F. Porsche Aktiengesellschaft, Stuttgart, DE;
Markus Timmer, Leonberg, DE;
DR. ING. H.C.F. PORSCHE AKTIENGESELLSCHAFT, Stuttgart, DE;
Abstract
A method for diagnosis of a tank ventilation valve in a tank ventilation system for an internal combustion engine of a motor vehicle includes actuating a tank ventilation valve via a control unit, and checking the functionality of the tank ventilation valve in a manner dependent on a pressure oscillation measured by the pressure sensor. The tank ventilation system includes a filter having a first feed line from a fuel tank, a second feed line with a connection to a surrounding atmosphere, and a third feed line to a tank ventilation valve, wherein the tank ventilation valve has a connection to two different introduction points at an intake pipe, wherein the connection has a first line system and a second line system, wherein the tank ventilation system further includes at least one pressure sensor installed in the second line system between tank ventilation valve and intake pipe.