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. 07, 2003
Filed:
May. 07, 2002
David M. Decker, Brownsburg, IN (US);
Steven Roby, Asheville, NC (US);
BorgWarner, Inc., Auburn Hills, MI (US);
Abstract
A compressor wheel is re-designed to permit die inserts ( ), which occupy the air passage and define the blades ( ) during a process of forming a wax pattern ( ) of a compressor wheel, to be pulled without being impeded by the blades. This modified blade design enables the automated production of wax patterns ( ) using simplified tooling. These wax patterns ( ) can be used in a large-scale investment casting process, and produce an economical cast titanium compressor wheel which performs aerodynamically at high boost pressure/RPM. The compressor wheel improves low cycle fatigue, withstands high temperatures and temperature changes, and permits operation at high boost pressure ratio while, on the other hand, having low weight, low inertial drag, and high responsiveness. The invention further concerns an economical method for operating an internal combustion engine, comprising providing said engine with an easily manufactured, long-life titanium compressor wheel and driving the titanium compressor wheel at high RPM for increasing combustion air throughput and density.