Invention Grant
US08983745B2 System and method of executing a double transition shift in a transmission with transitioning clutch having opposite clutch slip and torque carrying directions
有权
在具有相反离合器滑移和扭矩承载方向的过渡离合器的变速器中执行双过渡变速的系统和方法
- Patent Title: System and method of executing a double transition shift in a transmission with transitioning clutch having opposite clutch slip and torque carrying directions
- Patent Title (中): 在具有相反离合器滑移和扭矩承载方向的过渡离合器的变速器中执行双过渡变速的系统和方法
-
Application No.: US13794915Application Date: 2013-03-12
-
Publication No.: US08983745B2Publication Date: 2015-03-17
- Inventor: Vijay A. Neelakantan , Nathaniel E. Wilke
- Applicant: GM Global Technology Operations LLC
- Applicant Address: US MI Detroit
- Assignee: GM Global Technology Operations LLC
- Current Assignee: GM Global Technology Operations LLC
- Current Assignee Address: US MI Detroit
- Agency: Quinn Law Group, PLLC
- Main IPC: F16D48/06
- IPC: F16D48/06

Abstract:
A method of executing a double transition shift in a transmission includes determining via a controller that one of four clutches involved in the shift has a clutch slip direction relative to input member rotation direction in one of the current gear and the commanded gear and an opposite clutch torque direction relative to input member torque direction in the other of the current gear and the commanded gear. The controller then calculates clutch torques for at least some of the offgoing clutches and at least some of the oncoming clutches, and controls torque at the offgoing clutches and the oncoming clutches during the shift according to the calculated clutch torques to ensure that the clutch with the opposite slip and torque directions does not provide reaction torque during the shift unless clutch slip across said one of the four clutches is zero or in the clutch torque direction.
Public/Granted literature
Information query