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. 25, 2019
Filed:
Sep. 06, 2016
GM Global Technology Operations Llc, Detroit, MI (US);
Alexander S Barath, Brighton, MI (US);
Crystal J Nassouri, West Bloomfield, MI (US);
GM GLOBAL TECHNOLOGY OPERATIONS LLC, Detroit, MI (US);
Abstract
A continuously variable transmission (CVT), a transmission control system, and a method vary CVT clamping pressure based on an operation parameter. The control system is configured to command an initial minimum clamping pressure to be applied to the variator assembly to achieve a desired torque capacity. The control system determines one or more vehicle operation parameters and determines a vehicle condition based on the vehicle operation parameter(s). The vehicle condition is selectable from at least a base condition, an elevated condition, and a high condition. The control system selects a compensation strategy based on the vehicle condition. If an elevated compensation strategy has been selected and a predetermined condition has been met, the control system commands an elevated clamping pressure to be applied to the variator assembly. If a high compensation strategy has been selected, the control system commands a high clamping pressure to be applied to the variator assembly.