Invention Grant
- Patent Title: Method and apparatus for entering neutral idle from a forward drive mode
- Patent Title (中): 从正向驱动模式进入空档的方法和装置
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Application No.: US12565952Application Date: 2009-09-24
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Publication No.: US08620544B2Publication Date: 2013-12-31
- Inventor: Ronald F. Lochocki, Jr. , Sindu Sebastian , David W. Wright
- Applicant: Ronald F. Lochocki, Jr. , Sindu Sebastian , David W. Wright
- 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: Quinh Law Group, PLLC
- Main IPC: G06F7/00
- IPC: G06F7/00

Abstract:
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.
Public/Granted literature
- US20110071741A1 METHOD AND APPARATUS FOR ENTERING NEUTRAL IDLE FROM A FORWARD DRIVE MODE Public/Granted day:2011-03-24
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