Patent · US Expired

Method and system for upshifting an automatic transmission

US4254671A · kind A · utility

6Cited by

6References

5Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Joseph Sauer · Strullendorf, DE
Volker Kadelbach · Freiberg, DE
Gerhard Will · Steinheim, DE

Key dates

Filing date	Feb 28, 1978
Grant date	Mar 10, 1981
Priority date	—
Expiry date	Feb 28, 1998

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF16H2061/166
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

For automotive vehicles having an engine which has a speed governor which is activated when the engine reaches the maximum permissible engine speed, an AND-gate is supplied which furnishes an upshift signal when the engine speed has reached the maximum permissible speed and when, simultaneously, the pedal is at the full load position or the kickdown switch is activated. The upshift signal is applied to the control circuit for the automatic transmission. It may be combined with a signal signifying vehicle speed in a direction so as to increase the apparent vehicle speed or with a signal indicative of throttle position to indicate an actual lower engine load than present.

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