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, 2011
Filed:
Dec. 11, 2008
Ernst Wild, Oberriexingen, DE;
Ernst Wild, Oberriexingen, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
A procedure for checking the functionality of a tank ventilation valve of a tank ventilation system for a motor vehicle with a fuel tank, an adsorbing filter, which is connected to the fuel tank over a filter line and which provides a vent pipe, and with the tank ventilation valve, which is connected to the inlet manifold of a combustion engine that provides an actuator for the idle mode over valve pipes, is thereby characterized, in that the mass flow that flows through the tank ventilation valve in the idle mode of the combustion engine and the mass flow that flows through the actuator for the idle mode are detected and in that the functionality of the tank ventilation valve is deduced from a variation of the actuator for the idle mode.