Patent · US Expired

Method for controlling a continuously variable transmission

US6939264B2 · kind B2 · utility

2Cited by

12References

5Claims

0Family size

Assignees

Conti Temic microelectronic GmbH · DE
AUDI AG · DE

Inventors

Georg Hommes · Ingolstadt, DE
Rainer Ludwig · Bitburg, DE
Ari Ojamies · Spalt, DE

Key dates

Filing date	Mar 5, 2002
Grant date	Sep 6, 2005
Priority date	—
Expiry date	Mar 5, 2022

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF16H61/66259
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

The transmission ratio of a stepless transmission is adjusted in accordance with a selectable closed loop control strategy, whereby the transmission ratio is infinitely variable between two transmission ratio end values by actuator forces effective on axially adjustable bevel discs forming part of the stepless transmission. High end position forces on the bevel discs in their end positions are limited, yet the entire control range of the bevel discs may be used. For this purpose the transmission ratio is modulated in an end position operating mode by modulating the actuator forces that axially shift the bevel discs. The actuator forces are controlled in a closed loop manner.

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