Optimization of switching operations

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United States of America Patent

PATENT NO 9897200
SERIAL NO

15223000

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Abstract

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A method of optimizing shifting of a shifting element which fixes a shaft to another component of the drive-train. Three shifting processes are influenced by respective characteristic forms of a control parameter. The first and second characteristic forms are different from one another. Each shifting process has a distinct start and end time (tBeginn, tEnde). The rotational speed of the shaft is a function n(t) of time t. An idealized rotational speed nideal(t):=G{n(t)} is determined by a filter G. First and second evaluation indexes I:=I(t−Δt,t)/I (tBeginn−t, tBeginn) are calculated, in which tBeginnEnde. I(ta, tb) is a measure of a deviation of the rotational speed n(t) from the idealized rotational speed nideal(t) over time [ta,tb]. The third characteristic form is chosen based on the first and second evaluation indexes I.

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Patent Owner(s)

Patent OwnerAddress
ZF FRIEDRICHSHAFEN AGLÖWENTALER STR 20 FRIEDRICHSHAFEN 88046

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Szabo, Tomas Ravensburg, DE 3 1

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