Temic Telefunken Microelectronic Gmbh

Audi Ag

Robert Boschgmbh

Luk Getriebe-systeme Gmbh

Michael Genzel

Gerhard Hettich

Armin Tonn

Rodolfo Moller

Werner Flierl

Norbert Ramm

Armin Gottschaller

Thomas Schmid

Willem Kuster

Andreas Leicht

Oswald Friedmann

Manfred Homm

Hans-Peter Fleischmann

Hans-Jurgen Rudolph

Karl Barnreiter

Roger Pohlmann

Gu Schmid

The invention concerns a control arrangement for an automatic electrohydraulically controlled transmission. In order to reduce expenditure on parts and assembly, the hydraulic control system and electronic control system are mounted directly adjacent each other and plug-in connections are provided between the solenoid valves of the hydraulic control system and the electronic control system. The hydraulic control system (,) substantially comprises two duct panels (,) in which control ducts, piston slides and solenoid valves (not shown) are disposed for controlling the conical plates and couplings of the transmission. The pressurized hydraulic fluid is fed directly into these duct panels from the pump (,). The electronic control system (,) has a single central connection (,) which is secured in the transmission housing cover (,) by an annular seal. Rotational speed sensors for the transmission shafts and temperature and pressure sensors are integrated into the control unit.

Control arrangement for an automatic, electrohydraulically controlled transmission

A fluid-operated regulating apparatus for use in a motor vehicle, particularly to control the operation of a consumer, such as a clutch which transmits torque between an engine and a transmission in the power train of a vehicle as a function of one or more parameters, comprises at least one pump which supplies a flow of pressurized hydraulic or pneumatic fluid to the consumer by way of a valve controlled by an electronic unit which receives signals from a plurality of sensors. The signals which the electronic unit transmits to the valve are dependent upon at least one variable parameter which is generated by a plurality of components. One of these components is modulated or modulatable at a first frequency, and another of these components is modulated or modulatable at a second frequency which can be higher or lower than the first frequency. This reduces the likelihood of pronounced knocking or chatter of a reciprocable valving element of the valve against its seat and ensures an optimal reduction of hysteresis within the entire operating range of the consumer.

Fluid-operated regulating apparatus and method of using the same

A process for regulating continuously variable transmissions in motor vehicles by means of a controller includes a first control circuit as a speed controller for regulating the transmission input speed as the product calculated from the transmission output speed and the transmission ratio, and a second control circuit post-connected to the first control circuit as a speed gradient controller for regulating the time derivative of the transmission input speed. A correction value, dependent on the functional value of a correcting function and obtained from a correction element, is added to the summation element at the controller input of one of the two control circuits. The correction value is obtained such that the regulating ranges are specified, respectively, with a different control behavior of the controller.

Procedure for controlling continuous variable transmissions in motor

A continuously variable transmission in a motor vehicle is regulated using a controller comprising a first control circuit as a speed controller for regulating the transmission input speed as the product calculated from the transmission output speed and the transmission ratio, complete with a summation element at the controller input as well as with a control element, and a second control circuit post-connected to the first control circuit as a speed gradient controller for regulating the time derivative of the transmission input speed, complete with a summation element at the controller input. To preset a variable control response of the controller, different filter functions are defined, in relation to the operating conditions of the motor vehicle, as a fixed relationship between the input quantity control deviation as the difference calculated from nominal and actual values of the transmission input speed and the output quantity nominal gradient value of the transmission input speed, and fed to the control element of the first control circuit, which control element has been designed as a filter element. Depending on the current operating conditions of the motor vehicle, and using of the predefined filter functions, the filter element generates a filter function used as a current filter function. The function values of the current filter function are fed as filter values and as a reference magnitude from the filter element to the summation element at the controller input of the second control circuit.

A motor vehicle control module is described comprising a control unit with a carrier body, a circuit arrangement applied on the carrier body, a housing body that at least partially encloses the carrier body, at least one stamped grid with several stamped grid connections integrated in the housing body, and also the sensors and/or actuators with sensor elements and sensor connections and respectively actuator elements and actuator connections associated to the control unit. To reduce the space requirement and the costs and to improve the susceptibility to faults in the signal transmission from the sensors/actuators to the control unit, at least some of the sensors/actuators are situated in the control unit or in the immediate proximity of the control unit and are contacted by directly joining their respective sensor connections or actuator connections with stamped grid connections of the stamped grid of the control unit.

Control module for motor vehicles

A device is proposed to determine the rotational speed of a transfer element (3) arranged in variable-diameter pulleys (1, 2) of a continuously variable transmission system, the said device Consisting of a sliding stock (4, 15), with a sensor (10, 16) which is supported on the transfer element (3) on the inner sides of the variable-diameter pulleys, which sliding stock is connected to the transmission case (8) by a spring (6) loaded rocker arm (5) mounted in a swivelling joint (7). With the knowledge of the peripheral speed of the transfer element (3), the rotary speeds (N1, N2) of the set of variable-diameter pulleys (1, 2) and the effective transmission radii (r1, r2), the slippage can be determined between the transfer element (3) and the sets of variable-diameter pulleys (1, 2). By comparing the previously established maximum amounts of slippage with the detected amounts of slippage, the maximum requisite pressure applied by the axially shifting variable-diameter pulley (9) in each set of variable-diameter pulleys (1, 2) can be adjusted to the optimum amount (see FIG. 1).

Device for determining belt rotational speed of continuously variable

A procedure to control the drive unit in motor vehicles wherein: the maximum engine performance characteristic is determined; as a minimum engine performance characteristic, a reference performance characteristic is specified by how drive resistance depends on vehicle speed at a medium payload of the motor vehicle; above the reference performance characteristic, a first performance characteristic which is dependent on actual driving speed is defined and allocated a minimum assessment value; between this first performance characteristic and the maximum engine performance characteristic, a second performance characteristic which is also dependent on actual driving speed is defined and allocated a maximum assessment value; the current engine performance is determined; current assessment values are determined by comparing current engine performance to the first performance characteristic and the second performance characteristic; the current assessment values, as continuously determined, are filtered over time in this way, filtered assessment values are obtained; and these filtered assessment values are used to select drive unit control parameters, or parameter sets, which then are used to control the drive unit.

Procedure for controlling a motor vehicle drive unit

A process to adjust the pretensioning force for the transmission element of a continuously variable transmission, complete with two disc assemblies comprising two discs each, will be described. For optimized specification of the pretensioning force, the following process steps will be provided:

Pretensioning force adjustment of continuously variable transmission

A method for operating a digital logic semiconductor component, wherein: the logic semiconductor component is operated in several operational modes at respective fixed clock cycles depending on environmental temperatures; each operational mode is allocated a respective clock cycle with, in each case, a different clock frequency; each operational mode is allocated a respective temperature-dependent limit value with, in each case, a different limit temperature which when reached causes a change of operational mode to occur; and, when changing to an operational mode with a higher limit temperature, the clock frequency is reduced, and when changing to an operational mode with a lower limit temperature, the clock frequency is increased.

Growing community of inventors

Rosstal, Germany

Michael Genzel