Patent · US Expired

Control system and control process for an infinitely variable transmission

US5642644A · kind A · utility

2Cited by

3References

10Claims

0Family size

Assignee

Dr. Ing. h.c. F. Porsche AG · DE

Inventors

Patric Lardy · Weil der Stadt, DE
Joseph Petersmann · Wimsheim, DE

Key dates

Filing date	Nov 21, 1995
Grant date	Jul 1, 1997
Priority date	—
Expiry date	Nov 21, 2015

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T74/1927
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

A control system and process for an infinitely variable transmission which has a first operating mode which automatically selects the transmission ratio, and a second operating mode in which the transmission ratio can be selected directly by the driver. According to the invention, the degree of damping effective during the adjustment of the transmission ratio is adjusted in response to the selected operating mode. In the automatic operating mode, a high degree of damping is used, while in the manual operating mode, a lower degree of damping is provided.

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