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:
Jun. 02, 2015
Filed:
Dec. 06, 2011
Method to control a hybrid transmission using on-off switches controlling hydraulic flow to a clutch
Ali K. Naqvi, White Lake, MI (US);
Jean Marie Miller, Plymouth, MI (US);
Ali K. Naqvi, White Lake, MI (US);
Jean Marie Miller, Plymouth, MI (US);
GM GLOBAL TECHNOLOGY OPERATIONS LLC, Detroit, MI (US);
Abstract
A transmission includes a plurality of synchronously operated clutches selectably transmitting torque from a torque generative device to an output member. A method to control the transmission through a shift event includes monitoring a desired shift event including monitoring a clutch to be engaged, determining a time at which the clutch to be engaged will be synchronized, determining a required clutch fill time for the clutch to be engaged, and actuating an on-off hydraulic control switch selectably providing pressurized hydraulic fluid to the clutch to be engaged based upon coordinating the time at which the clutch to be engaged will be synchronized and the required clutch fill time.