Robert Boschgmbh

Avl List Gmbh

Holger Huelser

Martin-Peter Bolz

Juergen Loeffler

Marko Poljansek

Wolfgang Hermsen

Rasmus Frei

Isabelle Gentil-Kreienkamp

Frank Bickendorf

Jim Odeskog

Ferdinand Grob

Rainer Kallenbach

Rainer Mayer

Thorsten Juenemann

Andrea Steiger-Pischke

Torsten Bertram

Karl-Heinz Senger

Juergen Schirmer

Volker Pitzal

Rolf Maier-Landgrebe

Torsten Heidrich

Thomas Schuster

Rainer Bitzer

Michael Walther

Werner Kind

Reiner Folke

Volkmar Foelsche

Christian Schwientek

Klaus Harms

Ingo Allmer

Pio Torre Flores

Marc Heckes

Arno Huss

Joerg Petersen

Werner Folkendt

The invention relates to a diagnosis method for an exhaust gas post-treatment system for the reduction of nitric oxides in the exhaust gas train of an internal combustion engine by means of selective catalytic reduction. The following steps are provided for easy recognition of errors: definition of at least one threshold value for the Noconcentration for at least one engine operation point; shifting the operational mode of the internal combustion engine into an operational state of diagnosis, wherein in the operational state of diagnosis substantially more Noemissions are produced than in the normal operational mode; determining an amount of reducing agents corresponding to the increased amount of Noemisions in the operational state of diagnosis; controlling a dosing device in order to introduce the amount of reducing agents, corresponding to the increased amount of NOemissions during the operational state of diagnosis, into the wase gas; measuring the concentration of NOdownstream from the post-treatment device; comparing the measured concentration of NOto the threshold value; taking a decision as to the erroneous or error-free operation of the waste gas post-treatment system based on comparison of the measured concentration of NOto the threshold value; terminating the operational state of diagnosis.

Diagnosis method for an exhaust gas post-treatment system

A device and a method implementable therewith for regulating the driving speed of at least one vehicle, having an electric motor/generator connected or connectable to a drive train for at least one wheel as a function of at least its actual speed and setpoint speed. The device includes a control unit for controlling the torque of the electric motor/generator, an arrangement for driving the electric motor/generator, an arrangement for recording the actual speed of the vehicle and an arrangement for preselecting the setpoint speed of the vehicle. In the device, the electric motor/generator is usable in generator operation to generate a braking torque and in engine operation to generate a driving torque.

Device and method for regulating the driving speed of a vehicle

A method for operating an internal combustion engine is provided. By taking into account a setpoint temperature Tof the internal combustion engine which depends on external and internal boundary conditions when controlling and/or regulating temperature-dependent functions of the internal combustion engine, fuel consumption and emission characteristics of the internal combustion engine are improved.

Method for operating a combustion engine

In a method for operating a cooling and heating circuit of a motor vehicle driven by an internal combustion engine, a first cooling medium path is provided through a bypass conduit, a second cooling medium path is provided through a main cooler of the internal combustion engine, a third cooling medium is provided through a heating heat exchanger, and a fourth cooling medium path is provided through a heat accumulator. The cooling medium flows through the paths are subdivided by an electrically operated valves, and the cooling medium flows are generated by at least one pump. The valves are controlled by a control unit based on operational and environmental parameters as well as nominal values, and a third control valve which is controlled by the control unit is arranged in the fourth cooling medium path. The circuit is operated so that the third control valve is closed completely or partially when a reference temperature of a remaining cooling and heating circuit exceeds a nominal value provided in the control unit, and the third control valve is opened when the reference temperature is below the nominal value.

Method of operating a cooling and heating circuit of a motor vehicle

A method and an arrangement are disclosed for modeling a mechatronic system in a motor vehicle in the context of an object-based ordering concept as a mapping in the unified modeling language. The elements of the CARTRONIC&#xae; with components and envelopes as their classes or objects and orders (with feedback), inquiries (with hint) and requests as their communication relationship are presented based on examples together with the essential rules from the overall control rules. A mapping requirement in the UML elements is shown for these modeling elements.

Method and device for modelling a mechatronic system in a motor vehicle

A method for regulating the temperature of a coolant of an internal combustion engine, including a temperature sensor detecting the temperature of the coolant and a first control unit controlling and/or regulating the coolant temperature to obtain a predetermined temperature setpoint value, a further control unit being provided whose signals are fed to the first control unit, the further control unit relaying signals about an established driver type to the first control unit and, depending on whether the driver type is classified as sporty or economical, the first control unit presetting the temperature setpoint value, in which a coolant volume flow for cooling the internal combustion engine is regulated or controlled by the control unit as a function of the driver type established.

Method and device for regulating the temperature of a coolant of an internal combustion engine

A method and an arrangement automatically restarts a drive unit () when there is an unintended stalling of the drive unit (). In the case of stalling, checks are made as to whether the drive unit () was already in a steady-state condition directly before the stalling, as to whether the stalling took place because of an operator input, especially at an input unit () and as to whether a force-tight connection between the drive unit () and a transmission (or) is present. A restart of the drive unit () is automatically initiated when: the drive unit () was already in a steady-state condition directly before the stalling; when the stalling took place in a departure from the operator input; and, when the force-tight connection between the transmission (or) and the drive unit () is interrupted.

Method and arrangement for automatically restarting a drive unit

An electronic system for a vehicle includes first components for carrying out control tasks in response to operating sequences and second components that coordinate a cooperation of the components for carrying out control tasks. The first components carry out the control tasks by using operating functions and basis functions, wherein the system is constructed such that the basis functions are combined in a basis layer, and a system layer is superimposed on the basis functions, which includes at least two of the second components. At least one open interface of the system layer is provided for the operating functions, and the system layer links the basis functions to any and all operating functions, such that the operating functions can be interconnected and/or used in a modular fashion.

Electronic system for a vehicle and system layer for operational functions

The invention is directed to a method and an arrangement for controlling a motor vehicle having an integrated electric machine which generates electric as well as mechanical power. In the context of a hierarchal control structure having several logic components, the electric machine is allocated as a component &ldquo;electric drive&rdquo; to the component &ldquo;drive&rdquo; with respect to its function for generating mechanical power and as a component &ldquo;generator&rdquo; to the component &ldquo;vehicle electric drive&rdquo; with respect to its function for generating electric power.

Method and arrangement for controlling a vehicle

In a control system ( ) for an automatic motor vehicle transmission ( ), with a number of gear selection modules ( ), each of which is respectively designed to preset a target gear (zg) for a gear change depending on a number of operating parameters, through a suitable use of gear change prevention means, a particularly simple and transparent adaptation of the vehicle behavior to different driver requests should also be possible. To that end, the invention provides a number of analysis modules ( ), each of which, in a respectively predeterminable operating situation, generates a suppression signal (u) for preventing a gear change, where each analysis module ( ) is associated with a respective filter element ( ), which enables the transmission of the respective suppression signal (u), depending on which gear selection module ( ) has preset the target gear (zg). Preferably, a central control module ( ) contains information, in the form of an applicable matrix for each analysis module ( ), which indicates the target gear (zg)-presetting gear selection module ( ) for which the suppression signal (u) is to be transmitted.

Control system for a motor vehicle automatic gearbox and method for operating said control system

The invention is directed to a system for adjusting a transmission ratio in a transmission built into a motor vehicle. The system includes at least two transmission ratio criteria with which first transmission ratios are determined based on at least two different determining modes. The system also includes a first arrangement with the aid of which a second transmission ratio is selected in accordance with a pregiven prioritization from the determined first transmission ratios. The transmission ratio is then adjusted in dependence upon the selected second transmission ratio. In an advantageous configuration of the invention, a second arrangement is provided with which the second transmission ratio is modified in accordance with a pregiven strategy. The transmission ratio is then adjusted in dependence upon the modified second transmission ratio.

System for adjusting a transmission ratio in a transmission built into a motor vehicle

The invention relates to an arrangement and a method for controlling an adjusting speed for a change of an actual transmission ratio into a steady-state desired transmission ratio (shifting operation) for a continuously variable transmission mounted in the drive train of a motor vehicle. In the arrangement of the invention, it is provided that the shifting operation is subdivided into individual periods (dT) of fixed duration. During each period (dT), a dynamic desired transmission ratio (u ) is determined by multiplying the steady-state desired transmission ratio (u ) by a gradient (u ). The change of the actual transmission ratio (u) into a dynamic desired transmission ratio (u ) of each period (dT) takes place with a constant adjusting speed (v ).

Arrangement and method for controlling an adjusting speed of a shift operation in a continuously variable transmission

Method for determining a shifting step for a discretely shifting transmission of a motor vehicle

To avoid unnecessary energy consumption and to improve king performance, in a transmission unit for a motor vehicle, having a drive train ( ) which is intended for coupling to an internal combustion engine ( ) on the one hand and wheels ( ) of the vehicle on the other, and having an electrical machine ( ) and a transmission ( ), which constructed for torque transmission from the electrical machine ( ) to the drive train ( ) and vice versa, it is provided that the transmission ( ) has an idling switching state, in which no torque transmission from the electrical machine ( ) to the drive train ( ) occurs. For controlling the switching states, a control circuit ( ) is provided, which preferably operates by an automatic method.

Gear box unit for a motor vehicle

A system for adjusting a transmission ratio in a transmission built into a motor vehicle has at least two determination elements for determining values based on different determination modes with these values representing individual driving situations of the motor vehicle. An administrator calls up the values from the determination elements and stores the values. The administrator outputs individual ones of the values in response to a command whereupon the transmission ratio is adjusted at least in dependence upon the outputted ones of the values.

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Stuttgart, Germany

Holger Huelser