Invention Grant
- Patent Title: Negative torque upshift control
- Patent Title (中): 负转矩升档控制
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Application No.: US14249379Application Date: 2014-04-10
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Publication No.: US09188222B2Publication Date: 2015-11-17
- Inventor: Dara Monajemi , Matthew Pruski
- 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: F16H61/06
- IPC: F16H61/06 ; F16H61/04 ; B60W10/06 ; B60W10/08 ; B60W10/11

Abstract:
A vehicle includes a prime mover, input clutch, transmission, and controller. The transmission, which is selectively connected to the output shaft via the input clutch, has multiple friction clutches, including respective offgoing and oncoming clutches for a negative torque upshift. The controller includes a torque request module, offgoing clutch module, and oncoming clutch module. The torque request module limits input torque into the transmission during the negative torque upshift. The offgoing control module determines actual offgoing clutch torque capacity of the offgoing clutch, calculates an actual offgoing clutch pressure using the actual offgoing clutch torque capacity, and controls the offgoing clutch through the shift using the actual offgoing clutch pressure. The oncoming control module controls the oncoming clutch through multiple stages of control of the oncoming clutch, including a fill, staging, ramp, and quick-lock stage. Closed-loop pressure correction is provided via PID logic through the inertia and torque shift phases.
Public/Granted literature
- US20150292616A1 NEGATIVE TORQUE UPSHIFT CONTROL Public/Granted day:2015-10-15
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