Patent · US Active

Shift control method for an automated transmission

US9217504B2 · kind B2 · utility

2Cited by

4References

15Claims

0Family size

Assignee

ZF FRIEDRICHSHAFEN AG · DE

Inventors

Marcus Haug · Friedrichshafen, DE
Benjamin M. Berger · Rye Brook, US
Florian Schneider · Obernzenn, DE

Key dates

Filing date	Nov 6, 2014
Grant date	Dec 22, 2015
Priority date	—
Expiry date	Nov 6, 2034

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF16H2061/047
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

A shift control method for an automated transmission of a motor vehicle. The transmission has an input shaft that is connectable, via a separator clutch, to an engine driveshaft. An output shaft is connected with the axle transmission of a drive axle or with a transfer box, and starting gears are engagable by gear clutches. When tooth-on-tooth positions occurs at the associated gear clutch, during engagement of a starting gear while the vehicle is stationary, such tooth-on-tooth positioning is resolved with maximum comfort. The method provides that when a tooth-on-tooth position exists at the gear clutch of the starting gear, engagement of the gear clutch is first interrupted, then drive torque is applied to the input shaft or a transmission shaft in driving connection therewith to rotate the input-side clutch half of the gear clutch, and the drive torque is then eliminated before the engagement of the gear clutch continues.

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