OPENTECHNICAL PUBLICATION
OT-2026-000000280

Method for adapting a pressure characteristic line of a friction-locking shifting element of a transmission, and controller

Published: 2026-09-15T19:02:41.779473Z
Permanent URL: https://opentechnical.org/p/OT-2026-000000280
Categories: Industrial Motion & Power Transmission > Rotary Motion

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ABSTRACT

A method for adapting a pressure characteristic curve of a friction-locking
shift element of a transmission of a motor vehicle includes actuating the
shift element using a rapid filling pressure for a first time, shorter than an
adapted rapid filling time by a defined period of time. The method further
includes subsequently actuating the shift element using a waiting pressure for
a waiting time, the waiting pressure being lower than the rapid filling
pressure. The method further includes subsequently actuating the shift element
using the rapid filling pressure during a second time, equal to the defined
period of time, and ascertaining a reaction of the transmission to adaptation.
Additionally, the method includes determining, when the reaction of the
transmission to the adaptation corresponds to a reaction to the rapid filling
time adaptation, a pressure at a characteristic point on the curve being
adapted as the waiting pressure.

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OpenTechnical publication OT-2026-000000280
Published 2026-09-15T19:02:41.779473Z
https://opentechnical.org/p/OT-2026-000000280