Patent · US Expired

Automotive gearshift jolt minimization system

US4611507A · kind A · utility

9Cited by

11References

6Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Rainer Burkel · Le Chesnay, FR
Alfred Muller · Krefeld, DE
Cornelius Peter · Ansbach, DE
Manfred Schwab · Gerlingen, DE

Key dates

Filing date	Mar 18, 1985
Grant date	Sep 16, 1986
Priority date	—
Expiry date	Mar 18, 2005

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF16H2059/6807
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

To control the pressure p of an operating fluid in an automatic transmission (12), the input speed and output speed (n.sub.T, n.sub.out) of the transmission is sensed, and the pressure (p) is so controlled by a control unit (21) that the transmission ratio which is actually coupled by the transmission, in view of the pressure set by the friction bands, is carried out in accordance with a predetermined timing function (i.sub.com), for example as stored in a read-only memory (ROM, 24). Change in shifting characteristics can be obtained, for example, by operator-selected different time-engagement relationships to obtain maximum passenger comfort or maximum acceleration, or intermediate relationships.

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