发明授权
- 专利标题: Method and apparatus for entering neutral idle from a forward drive mode
- 专利标题(中): 从正向驱动模式进入空档的方法和装置
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申请号: US12565952申请日: 2009-09-24
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公开(公告)号: US08620544B2公开(公告)日: 2013-12-31
- 发明人: Ronald F. Lochocki, Jr. , Sindu Sebastian , David W. Wright
- 申请人: Ronald F. Lochocki, Jr. , Sindu Sebastian , David W. Wright
- 申请人地址: US MI Detroit
- 专利权人: GM Global Technology Operations LLC
- 当前专利权人: GM Global Technology Operations LLC
- 当前专利权人地址: US MI Detroit
- 代理机构: Quinh Law Group, PLLC
- 主分类号: G06F7/00
- IPC分类号: G06F7/00
摘要:
A transmission includes a plurality of clutches that are selectively engageable alone or in combination with each other to establish a plurality of forward drive modes, wherein one of the clutches is configured as a neutral idle (NI) clutch that is selectively actuated to shift the transmission into an NI state, and a controller. The controller is adapted to shift the transmission from a forward drive mode into the NI state during a coast-down maneuver prior to the transmission reaching a zero output speed. A method of shifting the transmission into the NI state includes determining the presence of a predetermined one of the forward drive modes using the controller, and using the controller to actuate a designated one of the clutches as an NI clutch to enter the NI state during the forward drive mode, during a coast-down maneuver, and prior to the transmission reaching a zero output speed.
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