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:
Sep. 30, 2008
Filed:
Apr. 20, 2005
Peter Fledersbacher, Stuttgart, DE;
Gernot Hertweck, Fellbach, DE;
Steffen Schiedt, Waiblingen, DE;
Guido Vent, Backnang-Steinbach, DE;
Jürgen Willand, Stuttgart, DE;
Peter Fledersbacher, Stuttgart, DE;
Gernot Hertweck, Fellbach, DE;
Steffen Schiedt, Waiblingen, DE;
Guido Vent, Backnang-Steinbach, DE;
Jürgen Willand, Stuttgart, DE;
Daimler AG, Stuttgart, DE;
Abstract
In a method of operating a compressor near the compressor pumping limit wherein the compressor includes a control arrangement for adjusting the momentary operating state of the compressor, the flow velocity of a mass flow through the compressor in the boundary layer along the wall of the flow passage is determined for detecting operation of the compressor close to the pumping limit from a reversal of the direction of the mass flow vector in the boundary layer and the control arrangement is actuated so as to prevent the compressor from transgressing the pumping limit.