Invention Grant
- Patent Title: Shuttle shifting for a continuously variable transmission
- Patent Title (中): 无缝变速器的换档
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Application No.: US14239996Application Date: 2012-08-27
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Publication No.: US08986162B2Publication Date: 2015-03-24
- Inventor: Peter J. Dix , Garth H. Bulgrien , Brian A. Hartman , Robert C. Prasse
- Applicant: Peter J. Dix , Garth H. Bulgrien , Brian A. Hartman , Robert C. Prasse
- Applicant Address: US PA New Holland
- Assignee: CNH Industrial America LLC
- Current Assignee: CNH Industrial America LLC
- Current Assignee Address: US PA New Holland
- Agent Sue C. Watson
- International Application: PCT/US2012/052565 WO 20120827
- International Announcement: WO2013/029052 WO 20130228
- Main IPC: F16H61/40
- IPC: F16H61/40 ; F16H41/24 ; B60W10/103 ; B60W30/18 ; B60W30/186 ; F16H61/66 ; F16H47/04 ; B60W10/04 ; B60W10/101 ; F16H37/08 ; F16H59/08

Abstract:
A shuttle shifting method for a continuously variable transmission automatically selects a manner of shuttle shifting as a function of certain monitored conditions. As one alternative, the direction of operation of the transmission is changed prior to reducing the vehicle speed to zero, and tilt of a swash plate of the hydrostatic power unit of the transmission is held substantially constant, for achieving fast, smooth shifts at faster starting and ending vehicle speeds, without coming to a complete stop. In another alternative, for slower starting and ending speeds, or other conditions such as a temperature condition is present, the vehicle is stopped by changing swash plate angle before effecting a directional change of the transmission and the swash plate.
Public/Granted literature
- US20140206502A1 Shuttle Shifting For A Continuously Variable Transmission Public/Granted day:2014-07-24
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