Procedure for operating a transmission device
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United States of America Patent
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Jan 3, 2017
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 which is shifted to various operating conditions by engaging shifting elements. At least one of the shifting elements is an interlocking shifting element which has to be engaged to obtain at least one defined operating condition of the transmission during which power flows between an input and an output shaft. When a command is received to engage the interlocking shifting element, a rotational speed of the transmission input shaft is displaced in the direction toward a synchronous rotational speed produced in the engaged operating condition of the interlocking shifting element at least as a function of the rotational speed of the transmission output shaft. When the variation of the rotational speed of the transmission input shaft crosses a predefined rotational speed threshold, the interlocking shifting element is actuated in its engaging direction.
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