Patent · US Active

Fault-detection methods for motor vehicle gearboxes

US8055402B2 · kind B2 · utility

1Cited by

5References

12Claims

0Family size

Assignee

GETRAG Getriebe- und Zahnradfabrik Hermann Hagen · DE

Inventors

Martin Seufert · Steinheim, DE
Ralf Hettich · Echterdingen, DE
Josef Glatthaar · Obermoschel, DE
Ralph Richter · St. Georgen, DE
Tobias Kalisch · Villingen-Schwenningen, DE
Marius Bryzgalski · St. Georgen, DE
Joerg Moellmann · Birkenfeld, DE

Key dates

Filing date	Apr 7, 2010
Grant date	Nov 8, 2011
Priority date	—
Expiry date	Apr 7, 2030

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF16H2061/1272
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

A method for detecting a fault state in an automated motor vehicle gearbox having two parallel branches. Each branch has a clutch and is configured to transmit driving torques from a drive unit to at least one driven wheel of the motor vehicle. The method comprises the steps of sensing whether both clutches are at least partially closed; of sensing the rotational speed of the at least one driven wheel and sensing the rotational speed of a non-driven wheel, and of detection of a fault state if both clutches are at least partially closed, and a difference between the rotational speeds of the wheels is greater than a predetermined reference value.

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