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:
Aug. 07, 2012
Filed:
Feb. 18, 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
An internal combustion engine with a plurality of cylinders, which are each assigned an inlet valve, an outlet valve and a combustion space, with an inlet camshaft connected to a camshaft adjuster, with an outlet camshaft connected to a camshaft adjuster, with a switchable inlet-valve drive which has a plurality of inlet cams for actuating the respective inlet valve, with a switchable outlet-valve drive which has a plurality of outlet cams for actuating the respective outlet valve, and with an exhaust-gas system. The internal combustion engine is operated with compression ignition or with spark ignition as a function of the operating point. For this purpose, for the compression ignition, a specific residual exhaust-gas quantity is set in the combustion space. Furthermore, the internal combustion engine is operated as a function of the operating point by means of an outlet cam.