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:
Dec. 29, 2015
Filed:
Jul. 31, 2014
GM Global Technology Operations Llc, Detroit, MI (US);
Goro Tamai, West Bloomfield, MI (US);
Lan Wang, Troy, MI (US);
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
A vehicle includes an engine, power inverter module, transmission, engine brake, and control system. The transmission has a stationary member, gearbox, and electric traction motor controlled via pulse width modulation. The engine brake selectively connects the engine to the stationary member in an electric vehicle drive mode. The control system executes a method to detect a requested autostart of the engine during the electric vehicle drive mode, disconnects the engine from the stationary member via the engine brake in response to the detected requested autostart, determines a driver-requested output torque and a maximum output torque of the transmission, and executes one of an engine self-lifting control routine and a motor over-modulation routine when the driver-requested output torque exceeds the calculated maximum output torque by less than a calibrated threshold, both routines when the driver-requested output torque exceeds the calculated maximum output torque by more than the calibrated threshold.