Method for performing gear-change operations in an automated mechanical

Abstract

A method for performing shifting operations in an automated, mechanical transmission, which is coupled via an automated clutch to an internal combustion engine, in particular a diesel engine. The setpoint engine torque (MDsoll) is essentially predefinable by a gas pedal (10) and/or by a vehicle-speed controller or limiter (17, 18). The setpoint engine torque is varied in response to gear shifting operations through the intervention of an electronic control device, as follows: The area of the electronic control device that is designated for the transmission control is continually supplied with the setpoint engine torque MDsoll1. In response to manually or automatically introduced gear shifting operations, a switch is made to the setpoint engine torque being input by the electronic transmission control, which calculates this setpoint engine torque (GW-MD) as a function of gear-change parameters and/or extracts it from gear-change characteristics maps or curves. After completion of the shifting operation, a switch is made, in turn, to the setpoint engine torque (MDsoll1) being input by the gas pedal (10) or the speed controller or limiter (17, 18). An especially smooth and lurch-free shifting can be achieved through the close 'cooperation' between transmission control and engine timing, as well as on the basis of the specific feedback information when working with automated, manual transmissions, particularly in conjunction with diesel engines.