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:
Oct. 07, 2014
Filed:
Jul. 03, 2012
Christopher Jay Weingartz, Holly, MI (US);
Matthew D. Whitton, Howell, MI (US);
Steven P. Moorman, Dexter, MI (US);
Matthew Kempeinen, Pinckney, MI (US);
Christopher Jay Weingartz, Holly, MI (US);
Matthew D. Whitton, Howell, MI (US);
Steven P. Moorman, Dexter, MI (US);
Matthew Kempeinen, Pinckney, MI (US);
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
A method of adjusting a pressure signal to an actuator piston to control movement of a synchronizer actuator fork of a transmission includes moving the synchronizer actuator fork from a start position into a target position by applying an initial fluid pressure value. The time required to move the synchronizer actuator fork is measured to define a measured actuation time, and compared to a target actuation time. A correction factor is applied to the initial fluid pressure value to define a revised fluid pressure value when the measured actuation time is not within a pre-defined time range of the target actuation time. When the measured actuation time is greater than the pre-defined time range of the target actuation time, the initial fluid pressure value is increased. When the measured actuation time is less than the pre-defined time range of the target actuation time, the initial fluid pressure value is decreased.