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. 23, 2006
Filed:
Sep. 18, 2002
Gholamabas Esteghlal, Stuttgart, DE;
Dieter Lederer, Ludwigsburg, DE;
Gholamabas Esteghlal, Stuttgart, DE;
Dieter Lederer, Ludwigsburg, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
A method for checking the operativeness of a tank-ventilation valve of a tank-ventilation system of a motor vehicle is characterized by the following steps: the tank-ventilation valve is triggered in a stepped manner in a preselectable working point; the intake-manifold pressure (p) is measured and modeled in the process; the measured intake-manifold pressure (p) is compared to the modeled intake-manifold pressure and an operative tank-ventilation valve assumed if a correlation within preselected limits is given; otherwise, a defective tank-ventilation valve is assumed.