- 专利标题: Double transition shift control in an automatic powershifting transmission
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申请号: US13294551申请日: 2011-11-11
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公开(公告)号: US08483919B2公开(公告)日: 2013-07-09
- 发明人: John Andrew Byerly , John P. Kresse , Mark A. Rains , Jeffrey K. Runde
- 申请人: John Andrew Byerly , John P. Kresse , Mark A. Rains , Jeffrey K. Runde
- 申请人地址: US IN Indianapolis
- 专利权人: Allison Transmission, Inc.
- 当前专利权人: Allison Transmission, Inc.
- 当前专利权人地址: US IN Indianapolis
- 代理机构: Woodard, Emhardt, Moriarty, McNett & Henry LLP
- 主分类号: G06F7/00
- IPC分类号: G06F7/00
摘要:
A system and method for controlling double transition shifts in an automatic transmission having multiple gear sections. During a double transition shift, the system performs simultaneous closed loop control of the primary oncoming clutch in the primary gear section and the secondary off-going clutch of the secondary gear section. Before the input shaft of the secondary gear section is fully pulled down or the secondary off-going clutch becomes overheated, the system switches closed loop control of the input shaft to the secondary on-coming clutch of the secondary gear section. The system utilizes model-based calculations to determine the initial clutch pressure settings when a clutch enters closed loop control.
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