Procedure for operating a transmission device
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United States of America Patent
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Nov 22, 2016
Grant Date -
Aug 21, 2014
app pub date -
Feb 11, 2014
filing date -
Feb 20, 2013
priority date (Note) -
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status (Latency Note)
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Abstract
A method of operating a transmission device having gears that are engaged by actuating shifting elements. At least one of the shifting elements is an interlocking shifting element which has to be engaged in at least one gear to transmit drive between an input and an output shaft. When a command is received to engage the interlocking shifting element, a rotational speed of the input shaft is displaced in the direction toward a synchronous rotation speed produced in the engaged operating condition of the interlocking shifting element at least as a function of the rotational speed of the output shaft. The engagement process of the interlocking shifting element from its disengaged operating condition is discontinued if, before reaching the synchronous rotational speed, the variation of the rotational speed of the input shaft crosses a predefined rotational speed threshold without initiating engagement of the interlocking shifting element.
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