Zf Friedrichshafen Ag

Bayerische Motoren Werke Aktiengesellschaft

Zf Friedirchshafen Ag

Gerd Frotscher

Ralf Dreibholz

Johannes Kaltenbach

Friedrich Tenbrock

Peter Schiele

Bernd Allgaier

Stefan Blattner

Michael Gromus

Thomas Schober

Martin Vohmann

Stefan Kilian

Kai Staiger

Markus Kaindl

Hans-Jorg Domian

Jürgen Gebert

Joachim Fröschl

A method for operating a parallel hybrid drive train of a vehicle having an internal combustion engine, an electric engine and an output. The electric engine being located in the power drive between the output and the internal combustion engine. A second shifting element is located between the internal combustion engine and the electric engine and a first shifting element between the electric engine and the output. Output torque driving the output can be adjusted according to the transmitting capacities of the first and second shifting elements and according to the input torque of the electric engine and/or internal combustion engine. These adjustments are corrected according to standards derived from divergences found in parameters during operation of the drive train.

Method for operating a parallel drive train of a vehicle

A method is described for operating a parallel hybrid device train () of a vehicle having an internal combustion engine (), an electric engine () and an output () wherein the electric engine () is disposed in the power train between the output () and the internal combustion engine () and both between the internal combustion engine () and the electric engine () and between the electric engine () and the output () is respectively provided a frictionally engaged shifting element (). In addition, a nominal output torque abutting on the output () can be adjusted according to the transmitting capacity of the first shifting element () located between the electric engine () and the output (). According to the invention, the transmitting capacity of the first shifting element () is adjusted under control according to the nominal input torque required so that the first shifting element () has a transmitting capacity needed for producing the nominal output torque on the output (). Furthermore, an input rotational speed of the electric engine () is adjusted under regulation during a starting process of the internal combustion engine () in order to keep the first shifting element in slip operation at least during the starting process of the internal combustion engine () and to produce the nominal output torque on the output ().

Method for operating a parallel hybrid drive train of a vehicle

A method for controlling and regulating the input power distribution of prime movers in a power train () of a motor vehicle which has one internal combustion engine (), at least one electric machine (), at least one clutch (), the same as one transmission (), and in which there is at least one control and regulation unit which, on the basis of predetermined, measuring and calculated values, controls and regulates the input power distribution between the internal combustion engine () and at least one electric machine () with regard to power dynamics of the vehicle, the same as its energy consumption, its emission and its driving comfort. In addition, departing from a signalized input power wish, it is provided that existing nominal operating values for the operation of at least one electric machine () is changed to new nominal operating values adapted to the actual input power wish and to changed operating situations of the vehicle and, that to determine the new nominal operating values for at least one electric machine (), the future maximum and minimum torques and outputs are precalculated, the same as the efficiency degree or losses thereof.

Method for control of input power distribution in a motor vehicle with hybrid engine drive

The method for control of an automated starting element such as a starting clutch or starting brake according to the thermal load of the starting clutch, which method regulates the control parameters according to a determined driving state, a tractional resistance and/or an actual clutch temperature, has one control module () which, below a critical control parameter limit starting from which an increased thermal load or an increased wear appears, reduced the friction work of the starting element. The reduction takes place by a reduction of the slipping time by regulating the slip in the starting element and/or by influencing at least one of the parameters (&#x3bc;, proportional/integral or differential parts, M_Control, p_Gradient or n_Nominal), the number of steps simultaneously used for reducing the friction work increasing with the temperature of the clutch.

Controlling of an automated starting element

A method for controlling an automatic transmission driven by an internal combustion engine is proposed in which a shift from a first to a second transmission ratio occurs as a pull upshift by a first clutch opening and a second clutch closing and electronic transmission control unit controls via electromagnetic valves the pressure curve of the first and of the second clutch during the shifting operation. The shifting operation is divided into different shifting phases, an engine intervention taking place within the gradient-adjustment (GE), the sliding (GL), the gradient-reduction (GA) and the closing (S) phases, an engine torque being reduced by an engine intervention factor (mdzegs) being transferred from the transmission control device to an engine control device of the internal combustion engine.

Growing community of inventors

Friedrichshafen, Germany

Gerd Frotscher