Patent Number: 8,715,137

Title: Method for controlling an automatic transmission of a motor vehicle

Abstract: A method of controlling an automatic transmission of a vehicle in which a hold gear function is activated by a driver request and deactivated depending on a return condition. The method comprises the step of (a) determining the return condition by a change in operating state, and (b) deactivating the hold gear function if a temporary operating state, for which the hold function is requested, ends and a change takes place between one of uphill driving and downhill driving and between driving one of up and down a hill and driving on a same plane.

Inventors: Winkel; Matthias (Weingarten, DE), Jager; Thomas (Meckenbeuren, DE), Mair; Roland (Tettnang, DE), Kneer; Reiner (Nonnenhorn, DE)

Assignee: ZF Friedrichshafen AG

International Classification: F16H 61/16 (20060101)

Expiration Date: 5/06/12018