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:
Jun. 05, 2007
Filed:
Feb. 18, 2005
Eric S. Tryon, Indianapolis, IN (US);
Joel E. Mowatt, Zionsville, IN (US);
James A. Raszkowski, Indianapolis, IN (US);
Richard L. Wagner, Quincy, IN (US);
Eric S. Tryon, Indianapolis, IN (US);
Joel E. Mowatt, Zionsville, IN (US);
James A. Raszkowski, Indianapolis, IN (US);
Richard L. Wagner, Quincy, IN (US);
GM Global Technology Operations, Inc., Detroit, MI (US);
DaimlerChrysler AG, Stuttgart, DE;
DaimlerChrysler Corporation, Auburn Hills, MI (US);
Abstract
The present invention relates to a torsional damper for an electrically-variable transmission. The torsional damper is equipped with a lock-out clutch to directly couple the engine to the input shaft of the transmission. The electric motors provided with the electrically-variable transmission can serve to effectively cancel out engine compression pulses when the springs of the torsional damper are locked out. The present invention also includes damper springs of variable rates to effectively attenuate distinctive or inconsistent torque fluctuations when the engine is operating in displacement-on-demand mode.