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:
Feb. 10, 2009
Filed:
Jan. 07, 2004
Applicants:
Rod Radovanovic, Columbus, IN (US);
John W. Shoemaker, Nashville, IN (US);
Inventors:
Rod Radovanovic, Columbus, IN (US);
John W. Shoemaker, Nashville, IN (US);
Assignee:
Cummins, Inc., Columbus, IN (US);
Primary Examiner:
Int. Cl.
CPC ...
F02D 31/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
An engine tuned for use with a hybrid engine or CVT has a relatively narrow torque curve that is roughly centered at the engine's rated speed, with less than 50% of the maximum torque provided throughout 80% of the range of engine speeds. The relatively narrow torque peak permits a variety of optimizations that improve fuel economy and reduce emissions.