Voith Turbo Gmbh Co. Kg

Voith Patent Gmbh

Bernd Dietzel

Herbert Depping

Manfred Bek

Tillman K&ouml;rner

Uli Stark

Hans Vogel

Thomas Sch&ouml;nharr

G&uuml;nter Willmerding

Franz Tr&uuml;bswasser

Jakob Haeckh

The invention concerns a method for controlling a starting aid of a motor vehicle, in particular of a bus. The release of the starting aid takes place as follows: reduction of the braking pressure in accordance with a predetermined first gradient; simultaneous detection of the rotational direction of an output shaft of a transmission of the motor vehicle or of another component which rotates as a function of the rotational speed of the drive wheels; upon detection of a rotational-direction signal which indicates forward travel of the motor vehicle, continuation of the reduction in the braking pressure in accordance with the predetermined first gradient and upon detection of another signal, continuation of the reduction of the braking pressure by way of a second gradient which is reduced in comparison with the first gradient or an increase in the braking pressure.

Method for controlling a starting aid of a motor vehicle

The aim of the invention is to regulate the braking torque in a drive train comprising an internal combustion engine () and a gearbox unit () which can be coupled to the same, using a regulatable clutch (). To this end, the power introduced by the wheels into the drive train of the vehicle is transmitted via the regulatable clutch (), in the overrun condition. The torque which can be transferred via the regulatable hydrodynamic clutch is controlled or regulated in such a way that the drive motor connected to the gearbox unit is operated at a rotational speed nwhich is equal to or larger than the idling rotational speed n.

Method for controlling and/or regulating the braking torque in a drive train, and control and regulating system

The invention relates to a device for the determination of the inclination of the roadway in a vehicle, with an arrangement (), for at least the indirect determination of parameters, which at least indirectly characterize the inclination of the roadway. Said arrangement (), for the at least indirect determination of parameters which at least indirectly characterize the inclination of the roadway, forms a construction unit () with a device () which may be operated by the driver for setting a driver command which alters or sets the driving state of a gearbox unit.

Device for inclination determination and arrangement for the setting of a driver command

The invention relates to a method for early recognition of abnormal occurrences in the operation of automatic or automated gearboxes wherein at least one variable A directly or indirectly characterizing the strain on elements which are to be coupled to each other in a non-positive fit is continuously determined after an n-th shift at least until a synchronous rev speed is reached or during a maximum shift period T ; wherein the variable A characterizing the strain on the elements that are to be coupled is mathematically combined with the time, or if several variables A Exist, said variables are mathematically combined with each other and the product of said combination is added up in the form of a variable W ; wherein the product thereof is compared with a first pre-definable or defined threshold value W Which, if exceeded, defines a state from which damage can be deduced and the shift action is aborted.

Method for early recognition of abnormal occurences in the operation of automatic or automated gearboxes

A process for the control of switching or shifting processes in automatic gears with an allocatable control device for use in drivelines of vehicles with at least one drive motor, especially in the form of an internal combustion engine. In a first process step the actual values of certain travel-dynamics magnitudes for a given time point t are detected or calculated; in a second process step there is determined from the actual values a theoretically achievable connection speed of the drive motor, especially the internal combustion engine, in the actually shifted-in gear for each time step; in a third process step the ascertained connection speed is compared with limit speeds that can be stipulated in a characteristic field of the drive motor, in which in dependence on the comparison results in no switching process, or an upshift- or downshift- switching process is initiated by governing of the setting members actuatable for the carrying-out of a gear change.

Method for controlling a gear-change operation in automatic transmissions

An electro-hydraulic control system with electronic control for a gearbox includes at least one actuator element device for receiving an analog measuring signal from the actuator element(s), a device for forming an actual actuator value from the analog measuring signal for the regulation of the actuator element(s), a computing device with a memory, and an output driver. At least one A/D converter is provided to convert the actual analog actuator element value (U ) and/or the analog actuator element measuring value into a digital value. A digital two-step controller regulates the actuator element(s) by a cyclically-called comparison of theoretical and actual values.

Electronic control for a transmission control system

A digital two-step controller for an actuator element includes an A/D converter, an output driver and a control device with a memory. An analog measuring signal is received from the actuator, converted in the A/D converter into an actual digital value, and is input into a first region of the memory of the control device. The actual digital value which is input into the first region of the memory is compared with a theoretical digital value for the actuator, which value is stored in a second region. The output of the control device to the output driver is set to ZERO when the actual digital value is larger or equal to the theoretical digital value. The output of the control device to the output driver is set to ONE when the theoretical digital value is greater than the actual digital value. After a sampling period &Dgr;t, another analog measuring signal is received from the actuator and the regulation steps are repeated in an interrupt called in cycles and corresponding to the sampling interval.

Digital two-step controller for an actuator element

A method for influencing the drive torque in a drive train comprising at least one electric motor at least indirectly driving one driven wheel, an internal combustion engine, and an electric machine allowing mechanical coupling to said engine operating a generator and a motor. Each selected motor allows electric coupling to the generator. The system creates a device for presetting a driver's desire for movement of the vehicle, coupled at least indirectly to an actuator of the internal combustion engine. According to the invention, the electric motors are operated as generators, at least upon release of the system for presetting a driver's desire. Drawn from the driven wheels by the electric motors is a first output portion that is generated in generator mode and fed to the electric machine for driving the internal combustion engine. The first output portion is selected such that the internal combustion engine operates at least at a speed of rotation greater than or equal to idling speed of rotation and at which the fuel supply is interrupted completely by means of a control coordinated with the internal combustion engine.

Drag torque control method in a diesel electric drive system and drive

An apparatus and method for operating a drive installation unit for a vehicle which reduces environmentally harmful gases while improving drive acceleration and deceleration performance by integrating an electric motor and power converter with an internal combustion engine.

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Syrgenstein, Germany

Bernd Dietzel