Countershaft automatic gearbox, in particular an automatic gearbox for motor vehicles

US5910068A · kind A · utility

Assignee

• Ford Global Technologies, LLC · US

Inventors

• Christian Krauss
• Rolf Najork · Cologne, DE
• Thomas Wollny · Niedergebraching, DE
• Thomas Flintrop · Cologne, DE

Key dates

• Filing date: Jan 12, 1998
• Grant date: Jun 8, 1999
• Expiry date: Jan 12, 2018

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T74/19251
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

In an automatically shiftable countershaft transmission, particularly for motor vehicles, the shift travels between the engagement points are established and the shift force may be varied as a function of gear step and dynamic load over the engagement travel. Depending on the functional phase, a lower force is provided during the synchronization phase, a higher force is provided during the shift-through phase and a lower force is provided during the dog-in phase.