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:
Apr. 27, 2010
Filed:
Jun. 04, 2008
Jan Krüger, Neuhausen, DE;
Marco Jess, Esslingen, DE;
Jan Krüger, Neuhausen, DE;
Marco Jess, Esslingen, DE;
J. Eberspächer GmbH & Co. KG, Esslingen, DE;
Abstract
An exhaust system () is provided for an internal combustion engine (), especially in a motor vehicle, with two separate exhaust gas lines () with a first sound transmission feature (), which couples the two exhaust gas lines () with one another, and with a control () for activating and deactivating the first sound transmission connection () as a function of at least one operating parameter of the internal combustion engine (). To improve the muffling behavior, a second sound transmission connection () is provided, which couples the two exhaust gas lines () with one another downstream of the first sound transmission connection (), and makes possible, depending on the particular operating parameter, three switching states (SZ), namely, a first switching state, in which both sound transmission connections () are deactivated, a second switching state, in which only one sound transmission connection () is activated, and a third switching state, in which both sound transmission connections () are activated.