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:
Jan. 27, 2009
Filed:
Sep. 14, 2005
Michael Preis, Koenigsbrunn, DE;
Joachim Bettendorf, Munich, DE;
Bernhard Staar, Gauting, DE;
Juergen Ringler, Kissing, DE;
Michael Preis, Koenigsbrunn, DE;
Joachim Bettendorf, Munich, DE;
Bernhard Staar, Gauting, DE;
Juergen Ringler, Kissing, DE;
Bayerische Motoren Werke Aktiengesellschaft, Munich, DE;
Abstract
A method is provided for operating a bivalent internal combustion engine, which may run lean with using a fuel with wide inflammability limits, such as hydrogen, whereby a first lean region close to the stoichiometric air ratio and a second lean region, adjacent to the first in the direction of greater λ valve are defined. The operation in the first lean region is skipped such that operation occurs either in the second lean region or at an approximately stoichiometric air ratio.