Patent · US Active

Method for operating an automatic gearbox

US8083641B2 · kind B2 · utility

2Cited by

16References

8Claims

0Family size

Assignee

ZF FRIEDRICHSHAFEN AG · DE

Inventors

Christian Popp · Kreßbronn, DE
Klaus Steinhauser · Kreßbronn, DE
Peter Schiele · Kreßbronn, DE
Bernd Allgaier · Kreßbronn, DE
Thilo Schmidt · Meckenbeuren, DE

Key dates

Filing date	Feb 27, 2007
Grant date	Dec 27, 2011
Priority date	—
Expiry date	Mar 15, 2029

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF16H2200/2043
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

A method for operating an automatic transmission of a motor vehicle, in particular a variable-speed transmission. The automatic transmission includes at least five shift elements and to transfer torque or force transfer in a forward gear and a reverse gear at least three shift of the at least five elements are engaged. When shifting the automatic transmission from a neutral position to a forward or a reverse gear, at least one of the three shift elements of the automatic transmission that are engaged in the respective forward or reverse gear, is engaged in a controlled manner.

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