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:
Jul. 24, 2012
Filed:
Sep. 01, 2009
Shawn H. Swales, Canton, MI (US);
Hong Yang, Rochester Hills, MI (US);
Antonio E. Bartolomeo, Warren, MI (US);
Shawn H. Swales, Canton, MI (US);
Hong Yang, Rochester Hills, MI (US);
Antonio E. Bartolomeo, Warren, MI (US);
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
A hybrid powertrain includes an engine having a crankshaft, and a hybrid transmission having an input member, an output member, and at least one motor/generator operable to provide or receive torque. A damper connects the crankshaft with the input member. A bi-directional rotational position sensing system operatively connects with either the crankshaft or an input side of the damper, and is configured to sense the rotational position and direction of the crankshaft, and provide a position signal indicative thereof. At least one controller is configured to receive the position signal and to provide a torque command to the motor/generator based at least in part on the position signal. The torque command is operable to cause the motor/generator to substantially cancel an expected engine torque pulse associated with the sensed rotational position during starting of the engine with the damper open. A method for controlling the hybrid powertrain is provided.