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:
Dec. 30, 2008
Filed:
Dec. 05, 2006
Wolfgang Mai, Eschborn, DE;
Jens Pache, Kelkheim, DE;
Markus Roth, Schwalbach, DE;
Gerd Rösel, Regensburg, DE;
Wolfgang Mai, Eschborn, DE;
Jens Pache, Kelkheim, DE;
Markus Roth, Schwalbach, DE;
Gerd Rösel, Regensburg, DE;
Siemens Aktiengesellschaft, Munich, DE;
Abstract
To operate an internal combustion engine subvolumes of the fluid flowing into an intake duct in each instance during a predetermined time period are determined for each period. Tank purging values of a characteristic quantity are determined for each period. The characteristic quantity is representative of a tank purging fuel mass, which flowed through the tank purging valve in each instance during the predetermined time period. The successive subvolumes are added together, starting from the currently determined subvolume, to give a total subvolume, until the total subvolume is greater than or equal to an effective intake duct volume downstream of the tank purging valve.