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:
Jul. 09, 2013
Filed:
Feb. 17, 2010
Leo Spiegel, Vaihingen/Enz, DE;
Van-khanh Tran, Weissach, DE;
Hartmut Voss, Wimsheim, DE;
Dietmar Schwarzenthal, Ditzingen, DE;
Leo Spiegel, Vaihingen/Enz, DE;
Van-Khanh Tran, Weissach, DE;
Hartmut Voss, Wimsheim, DE;
Dietmar Schwarzenthal, Ditzingen, DE;
Dr. Ing. h.c. F. Porsche Aktiengesellschaft, Stuttgart, DE;
Abstract
A method for operating an internal combustion engine with compression ignition or with spark ignition as a function of an operating point. A specific residual exhaust-gas quantity in the combustion space is set for compression ignition. The internal combustion engine is operated as a function of the operating point by an outlet cam, by which a first outlet opening phase and a second outlet opening phase take place. The second outlet opening phase commences during an inlet opening phase. At a first operating point in a compression-ignition mode, a residual exhaust-gas quantity in a combustion space is dimensioned as a function of a valve interference set between the inlet and the outlet valve during a charge exchange. At a second operating point in the compression-ignition mode the residual exhaust-gas quantity in the combustion space is dimensioned as a function of a duration of the second outlet opening phase.