Abstract: A system and method for maintaining the operation of an automated transmission (16), particularly a dual dutch transmission, for a motor vehicle, in case of a failure of an engine speed sensor (50) or a bus connection (44) between a first control module (42) controlling an engine (28) being connectable to the transmission (16) through at least one separation clutch (12, 149), and a second control module (34) controlling regulating units (12, 14) for connecting the engine (28) to the transmission (16) or to one or more driving wheels (34) in a force-transmitting manner, wherein gear-shift relevant data, particularly a number of revolutions (no) of the engine, is exchanged between the control modules (34, 42) over the bus connection (44).

Abstract: A method for controlling shift process in dual-clutch gearbox having dual-clutch gearbox input shaft connected to a drive engine, having two friction clutches and two partial gearboxes, comprising detecting demand for a shift from source gear into target gear, the source gear and target gear assigned to first partial gearbox; opening friction clutch assigned to first partial gearbox and closing friction clutch assigned to other partial gearbox to transmit drive power via intermediate gear of other partial gearbox; disengaging source gear and temporarily conducting a pressure-exertion process in friction clutch assigned to the first partial gearbox before engagement of target gear, with rotational speed of first partial gearbox being reduced due to the pressure-exerting operation according to drag torque, opening friction clutch assigned to other partial gearbox and closing friction clutch assigned to first partial gearbox to transfer drive power to the target gear without an interruption in tractive force.

Abstract: It is disclosed a system and method for maintaining the operation of an automated transmission (16), particularly a dual clutch transmission, for a motor vehicle, in case of a failure of an engine speed sensor (50) or a bus connection (44) between a first control module (42) controlling an engine (28) being connectable to the transmission (16) through at least one separation clutch (12, 149, and a second control module (34) controlling regulating units (12, 14) for connecting the engine (28) to the transmission (16) or to one or more driving wheels (34) in a force-transmitting manner, wherein gear-shift relevant data, particularly a number of revolutions (ne) of the engine, is exchanged between the control modules (34, 42) over the bus connection (44), the method comprising the following steps: checking whether a number of revolutions (ne; n1, n2) of a shaft (22; 30, 32, particularly an engine shaft (22), which is detected by a sensor (50) of one of the control modules (42) dedicated to this purpose can be tr

Abstract: The invention relates to a method for controlling a shift process in a dual-clutch gearbox having a dual-clutch gearbox input shaft connected to a drive engine, having two friction clutches and having two partial gearboxes.