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. 14, 2014
Filed:
Jun. 16, 2011
Jy-jen F. Sah, West Bloomfield, MI (US);
Lawrence A. Kaminsky, White Lake, MI (US);
Anthony H. Heap, Ann Arbor, MI (US);
Lisa M. Talarico, Milford, MI (US);
Jy-Jen F. Sah, West Bloomfield, MI (US);
Lawrence A. Kaminsky, White Lake, MI (US);
Anthony H. Heap, Ann Arbor, MI (US);
Lisa M. Talarico, Milford, MI (US);
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
A method for activating an oncoming clutch in a transmission includes monitoring rotational speeds of clutch elements of the oncoming clutch wherein the clutch elements are coupled to first and second rotationally independent torque actuators. A control speed profile for the first rotationally independent torque actuator is commanded. A speed profile of the oncoming clutch approaching zero speed is generated as is a control speed profile for the second rotationally independent torque actuator corresponding to a speed of the first rotationally independent torque actuator, the speed profile of the oncoming clutch, and an output speed of the transmission. A speed of the second rotationally independent torque actuator is controlled using the control speed profile for the second rotationally independent torque actuator. A speed of the oncoming clutch is monitored and the oncoming clutch is activated when the speed of the oncoming clutch is zero.