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:
Jan. 26, 2016
Filed:
Oct. 20, 2010
Craig J. Hawkins, Howell, MI (US);
Adam J. Heisel, Garden City, MI (US);
Christopher E. Whitney, Commerce, MI (US);
Matthew D. Whitton, Howell, MI (US);
Roger Joseph Rademacher, Holt, MI (US);
Keith D. Van Maanen, Birmingham, MI (US);
Craig J. Hawkins, Howell, MI (US);
Adam J. Heisel, Garden City, MI (US);
Christopher E. Whitney, Commerce, MI (US);
Matthew D. Whitton, Howell, MI (US);
Roger Joseph Rademacher, Holt, MI (US);
Keith D. Van Maanen, Birmingham, MI (US);
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
A method of executing a downshift in a fixed-gear powertrain having an input node and an output node related by a starting speed ratio before the downshift and a finishing speed ratio after is provided. The downshift includes a torque phase and an inertia phase. A starting output torque is calculated as a function of a starting driver request. An electric machine applies a starting regenerative input torque which is calculated as substantially equal to the starting output torque divided by the starting speed ratio. A finishing output torque is calculated as a function of a finishing driver request. The electric machine applies a finishing regenerative input torque which is calculated as substantially equal to the finishing output torque divided by the finishing speed ratio.