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:
Apr. 02, 2013
Filed:
Jun. 07, 2010
Shawn H. Swales, Canton, MI (US);
Hong Yang, Rochester Hills, MI (US);
Min-joong Kim, Bloomfield Hills, MI (US);
Shawn Scott Hawkins, Shelby Township, MI (US);
Amanda Luedtke, Berkley, MI (US);
Shawn H. Swales, Canton, MI (US);
Hong Yang, Rochester Hills, MI (US);
Min-Joong Kim, Bloomfield Hills, MI (US);
Shawn Scott Hawkins, Shelby Township, MI (US);
Amanda Luedtke, Berkley, MI (US);
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
A controller-executable method provides an electric-only (EV) launch mode in a vehicle having an accelerator pedal, an engine, a motor generator unit (MGU), a dual-clutch transmission (DCT), and a belt alternator starter system adapted for selectively rotating the crankshaft using motor torque from the MGU. Execution of the method uses motor torque from the MGU, while the engine is off, to accelerate the crankshaft to above a calibrated launch speed when a threshold minimum force is applied to the pedal. A designated one of the odd- and even-gear clutches of the DCT are controlled until input torque to the DCT equals a calibrated level. The other DCT clutch may be modulated to dampen drivetrain oscillations. The vehicle launches in the EV launch mode via the designated DCT clutch when the crankshaft speed exceeds an input speed of the DCT. The vehicle and controller are also provided.