Patent · US Active

Method for controlling a gear brake for an automated change-speed gearbox

US9008925B2 · kind B2 · utility

0Cited by

4References

8Claims

0Family size

Assignee

ZF FRIEDRICHSHAFEN AG · DE

Inventors

Mario Steinborn · Friedrichshafen, DE
Jochen Breuer · Tettnang, DE
Christoph Ruechardt · Bodolz, DE
Thomas Jaeger · Meckenbeuren, DE
Roland Mair · Tettnang, DE
Melchor Moro-Oliveros · Friedrichshafen, DE

Key dates

Filing date	Mar 2, 2012
Grant date	Apr 14, 2015
Priority date	—
Expiry date	May 22, 2032

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF16H2061/0411
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

A method of controlling a transmission brake of an automated change-speed transmission having a control cylinder, that is pressurized by inlet and outlet valves, and an upstream main cut-off valve by which a nominal pressure, supplied to the control cylinder, is regulated. Functional deviations of the transmission brake can be considered during a shifting operation, when the transmission is in neutral, the motor coupling clutch is disengaged and the transmission brake is engaged. The rotational speed gradient and the mass of the transmission components to be braked are determined and used to calculate the current braking torque of the transmission brake. The current braking torque relates to the current regulated nominal pressure, and the determined values are stored in a control unit and used during subsequent actuation of the transmission brake.

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