Patent ID: 7448291
Filing Date: 2008-11-11
Classification: F16H,Y10S,Y10T

Abstract:
1. A method for error recognition during switching a gear of an automated gearbox having at least one gearshift member, inside the gear, for switching speeds of the gear and an actuation device, outside the gear, having at least one actuation member for the purpose of actuating said at least one gearshift member, wherein said at least one actuation member can be moved by a selection actuator into at least one engagement position with said at least one gearshift member and which can be moved by a gearshift actuator for the purpose of moving said at least one gearshift member to at least one gearshift position, comprising the steps of: a) defining at least one terminal gearshift position for said at least one gearshift member, wherein said at least one terminal gearshift position corresponds to a particular set speed; b) defining at least one terminal actuation position, to establish a movement limit for said at least one actuation member during switching speeds of the gear, wherein said at least one terminal actuation position lies outside said at least one terminal gearshift position; c) acquiring said at least one gearshift and engagement positions, attained during switching speeds; and, d) diagnosing an error state of the gear or actuation device, wherein said diagnosis compares said at least one terminal gearshift and actuation positions with said at least one gearshift and engagement positions, respectively, and depends on whether said at least one gearshift member attains said at least one terminal gearshift position said at least one actuation member attains said at least one terminal actuation position, or whether neither the at least one terminal gearshift position, nor the at least one terminal actuation position is attained.