Daimler Chrysler Ag

Daimler Ag

Luk Getriebe-systeme Gmbh

Luk Gebriebe-systeme Gmbh

Anton Rink

Robert Fischer

Thomas Grass

Uwe Wagner

Thomas Pfund

Dieter Otto

Norbert Ebner

Jürgen Freitag

Johannes Braun

Jochen Retter

Klaus Neft

Joachim Schaefer

Pascal Heusler

Klaus Herzog

In a drive train of a motor vehicle comprising an internal combustion engine, at least one electrical machine which can be operated at least as a motor or as a generator, and a stepped automated manual transmission and at least one control device for controlling the internal combustion engine, the at least one electrical machine (P, P) and the stepped automated manual transmission and a method of operating the drive train, a braking torque on the driven wheels is kept approximately constant before, during and after a gear-shifting operation to a gear with a higher transmission ratio so as to avoid any jerks during such down shifting procedure.

Motor vehicle drive train and method for controlling a drive train

The magnitude of torque which can be transmitted by a bypass clutch between the housing and the turbine of a torque converter between a prime mover, such as an engine, and an automatic transmission in the power train of a motor vehicle is selectively regulatable by a computerized regulating unit. The regulation involves the transmission of torque by the clutch in dependency upon the magnitude of the torque being transmitted by the output element of the engine and ascertaining as well as adaptively applying to the clutch a variable force so that the clutch can transmit a predetermined torque. This entails automatic selection of a minimum slip between a torque receiving and a torque transmitting part of the power train. Compensation, particularly long-range compensation, is carried out for the existence of possible differences between the predetermined and actual torques being transmitted by the clutch.

Method of and apparatus for transmitting torque in vehicular power trains

An electronic control system has a plurality of mutually networked or communicating control units, with special, redundant safeguarding measures during transmission of a safety-related transmitted signal from a first control unit to a second control unit. The first control unit generates the transmitted signal and a second signal complementary thereto on different paths, and sends them to a memory, together with two additional signals which are significant for the paths. A third control unit reads out the transmitted signal and the second signal from the memory, and checks them, and, upon detection of an error, switches off the first control unit or, given correct signals, generates different types of test or safety signals and conducts them to a memory. The first control unit reads out the test or safety signals from the last-named memory and checks them and, upon detection of an error, switches itself off, or, given correct test or safety signals, feeds the transmitted signal and at least one prescribed selection of the test or safety signals to the second control unit.

Method and apparatus for ensuring integrity of transmitted data in a distributed control system

The invention relates to a method and an apparatus for operating an automated change-speed gearbox of a motor vehicle. The control device of the change-speed gearbox communicates via signals with a control unit of an anti-block control system. To allow particularly comforatable operation of the change-speed gearbox, the invention envisages that, as a function of signals from the control unit of the anti-lock control system, the change-speed gearbox is set to a neutral position, an appropriate gear ratio is determined and this gear ratio is engaged.

Method and apparatus for operating an automated change-speed gearbox

Method of and apparatus for transmitting torque in the power trains of

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Karlsruhe, Germany

Anton Rink