Patent · US Active

Method for terminating a gearshift for an automatic transmission for a motor vehicle wherein at least one positive-locking shifting element is involved

US9169925B2 · kind B2 · utility

0Cited by

2References

4Claims

0Family size

Assignee

ZF FRIEDRICHSHAFEN AG · DE

Inventors

Jörg Arnold · Markdorf, DE
Andreas Schmidt · Braunschweig, DE
Johannes Brockmann · Gettorf, DE

Key dates

Filing date	Aug 21, 2014
Grant date	Oct 27, 2015
Priority date	—
Expiry date	Aug 21, 2034

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF16H2200/2094
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

A method for terminating a gearshift for an automatic transmission for a motor vehicle is provided, wherein a positive-locking shifting element is involved. After the initiation of the gearshift, there is an evaluation of the continuous signals of at least one control unit of the vehicle, which affect the engine torque and thus the turbine speed gradient. Based on the evaluation of the signals, an upcoming change to the turbine speed gradient that exceeds a first predetermined threshold value or falls short of a second predetermined threshold value is detected, and, upon such detection, the gearshift is terminated.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.