专利名称：Transmission device and method for
operating the same
发明人：Simon Geiger,Matthias Madlener,Sven Bieber申请号：US15413523申请日：20170124公开号：US10066745B2公开日：20180904
专利附图：
摘要：A power-split transmission device for a vehicle, which connects a drive engine toa drive output, having a hydrostatic unit for continuous adjustment of the transmissionratio at a transmission unit, and two range clutches that alternately operate for
respectively associated driving ranges with different transmission ratios. A control unit,during regular vehicle deceleration, implements the driving range change from a firstrange, with higher transmission ratios, to a second range, with lower transmission ratios,by switching from the first to the second range clutch in accordance with a synchronouspoint dependent deceleration control logic. In the special case of an unexpected increaseof the deceleration dynamic at the beginning of an already initiated driving range changefrom the first to the second driving range, the control unit immediately forces the changeby bypassing the synchronous point dependent deceleration control logic when otherboundary conditions are fulfilled.
申请人：ZF Friedrichshafen AG
地址：Friedrichshafen DE
国籍：DE
代理机构：Davis & Bujold PLLC
代理人：Michael J. Bujold
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