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:
Oct. 11, 2011
Filed:
Apr. 18, 2007
Klaus Uphoff, Lehre, DE;
Kai Bohnstedt, Braunschweig, DE;
Mathias Dehmke, Braunschweig, DE;
Volkswagen Aktiengesellschaft, Wolfsburg, DE;
Abstract
An internal combustion engine includes an exhaust-gas system with n>1 exhaust-gas flow configurations, wherein n is an integer. The exhaust-gas flow configurations are at least partly separated from one another and each of the exhaust-gas flow configurations includes at least one catalytic converter. The internal combustion engine includes a secondary air supply system with at least one secondary air pump and at least one secondary air valve. The at least one secondary air pump is connected, via the at least one secondary air valve, to at most n−1 of the exhaust-gas flow configurations upstream of the at least one catalytic converter of the at most n−1 of the exhaust-gas flow configurations. The remaining ones of the exhaust-gas flow configurations are separated from the secondary air supply system.