Patent · US Expired

Device for controlling an automatic transmission of a motor vehicle

US6035735A · kind A · utility

24Cited by

15References

22Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Friedrich Graf · Eggenfelden, DE
Frank Lohrenz · Regensburg, DE
Werner Hauptmann · Grevesmühlen, DE
Kai Heesche · Munich, DE

Key dates

Filing date	Aug 21, 1998
Grant date	Mar 14, 2000
Priority date	—
Expiry date	Aug 21, 2018

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T74/1926
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

The device contains an electronic control system, which, in an automatic mode, automatically determines the transmission ratio in dependence of an operating condition, and contains selector devices, which, in the automatic mode, determine the driving stages of the transmission control and, in a manual mode, change the transmission ratio in steps. After a manual selection of the transmission ratio, driving and operating situations in which the automatic mode of the control system is desirable are detected and, if such a situation is detected, a return circuit causes the electronic control system to return to the automatic mode.

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