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:
Sep. 22, 2009
Filed:
Jun. 15, 2007
Alfred Elsässer, Keltern, DE;
Bernd Mahr, Plochingen, DE;
Alfred Elsässer, Keltern, DE;
Bernd Mahr, Plochingen, DE;
Mahle International GmbH, Stuttgart, DE;
Abstract
An exhaust gas recirculation apparatus () for an internal combustion engine (), in particular in a motor vehicle, has an exhaust gas recirculation line () which can be connected at the inlet end to an exhaust gas system () of the internal combustion engine () and at the outlet end to a fresh gas system () of the internal combustion engine () and having a return valve () arranged in the exhaust gas recirculation line () for adjusting an exhaust gas recirculation rate by varying the flow-through cross section of the exhaust gas recirculation line (). To improve the efficacy of the exhaust gas recirculation, the exhaust gas recirculation valve () is designed so that it adjusts the respective exhaust gas recirculation rate at least in one operating state of the exhaust gas recirculation apparatus (), so that it alternately reduces and increases and/or blocks and opens the flow-through cross section of the exhaust gas recirculation line () at predetermined or regulated switching points in time.