Patent ID: 8370033
Filing Date: 2013-02-05
Classification: F16H

Abstract:
1. A method of controlling an automated multi-step change-speed transmission of a motor vehicle comprising an electronic control unit connected to sensors for detecting operating parameters and connected to at least one of gear and clutch control elements for carrying out shift operations and comprising a data memory for storing control data such that the multi-step change-speed transmission being operable (a) in an automatic mode in which gearshifts are initiated automatically, (b) in a manual mode in which gearshifts are initiated manually by a driver, and (c) in a learning mode in which gearshifts are actuated manually and operating parameters are recorded automatically, the method comprising the steps of: activating a configuration-learning mode in which, during a test drive with manual gearshift initiation, operating parameters are automatically detected in an event-dependent manner; processing the operating parameters to produce control data for the multi-step change-speed; and storing the control data in the data memory for future control of the multi-step change-speed transmission such that; during a test drive for a predetermined number of operating points, each defined by a combination of a particular engine speed (n_mot) and a particular induced engine torque (m_ind) derived from a fuel injection quantity of a drive engine, respective operating parameters for determining a current traction force (f_zug) acting at drive wheels of the vehicle are determined, and from the determined traction force (f_zug), in each case a torque efficiency (eta) of the drive engine is calculated and stored in an appropriate data field of the data memory.