Daimler-Benz Ag

Mercedes-Benz Aktiengesellschaft

Gunter Jurgens

Hermann Gaus

Gerhard Wagner

Jurgen Pickard

Frank Tietze

Eberhard Frotschner

Heinrich Straub

Albrecht Greiner

Lothar Lang

Walter Robmann

Udo Surig

Klaus Martin

Werner Sell

Winfried Rub

A pressure medium actuated friction clutch with axially movable friction discs is engaged by at least one engagement spring and by an engagement actuator, and can be disengaged by a disengagement actuator In the steady-state engaged condition, only the spring force is effective.

Pressure medium actuated method and friction clutch with exclusively

A method for the automatic shifting of a multi-path toothed-wheel gear change box between two gears which are formed in a first gearbox subunit temporarily engages a middle gear formed in a second, parallel gearbox subunit. It is simultaneously ensured, by control of the working pressures for actuating the power-shift clutches connecting the gearbox subunits to the input shaft, that the speed characteristic of the input shaft shifting is essentially steady without remaining at the middle gear speed value.

Hydraulically-assisted automatic skip shifting method of a multi-path

In a toothed-wheel change gear, a gear pump for the conveyance of transmission oil is arranged in a separate gearbox chamber of a gearbox. Leakage oil flowing out at the gear pump is intermediately stored in the gearbox chamber in a controlled manner.

Toothed-wheel change gear pump for conveyance and a gearbox for

In a process for adaptive control of an internal-combustion engine or of another drive component of a motor vehicle, a set value/actual value comparison of a critical time interval with regard to an optimum operating behaviour is triggered upon each non-steady operating state. Set values and correction values for influencing a casual controlled variable with regard to the operating behaviour are assigned to selected operating points of the internal-combustion engine in the form of stored characteristic maps. If appropriate, the correction values are replaced by new correction values, determined according to a deviation. If the non-steady operating state occurs at a non-selected operating point, intermediate values for set value and correction value are interpolated. The interpolated correction intermediate value is used for influencing the controlled variable during the instantaneous non-steady operating state and, in the event of a deviation, for determining a new correction value, which is transferred exclusively into a neighboring selected operating point of the characteristic map.

Process for the adaptive control of an internal-combustion engine and/or

In a brakeband, two side bands extend from a connecting portion in one circumferential direction and a middle band located axially between these side bands extends from it in the other circumferential direction. The band ends of the two side bands (located opposite the connecting portion) are widened in the direction of the middle band, while the middle band is narrowed at its circumferentially corresponding band region. This provides a larger cross-section for the welded joint between the respective widened band ends of the two side bands and a circumferentially adjacent thrust piece of the brake actuating device.

Brakeband

In an arrangement for the automatic shifting of an epicyclic speed change transmission, a relatively quickly performed smooth selection operation in starting is achieved by the speed change transmission taking the form of a group gear divided into two transmission sections. In a first selection phase, the one transmission section is stalled with uncoupling from the drive motor and the transmission section connected to the output shaft is held in the driveless state. On reaching the stalled state, the torque transmissibility between the drive motor and output shaft is restored with a smooth flat rise beginning from zero, by pressure control in the shift actuators concerned.

Arrangement for an automatic shifting of an epicyclic, shiftable

An arrangement for adjusting the torque of an internal combustion engine which drives a change-speed gear box and automatic gear changing device in dependence on stored characteristics with specified variation of required torque value as a function of power demand in which at least two different gears are each associated with an individual stored characteristic. Switch-in signals, derived from the gear changing device and which initiate switching of a stored characteristic into an adjustment element which influences the torque, contain information on a gear to be selected. Engine power is at least approximately constant for each engine operating point in engine characteristic field when changing between two associated stored characteristics for the required torque value. An adjustment element is controlled by the switch-in stored characteristic until the gear changing device switches to the gear having a different associated stored characteristic.

Arrangement for adjusting the torque of an internal combustion engine

In a pressure medium adjusting element for actuating a disk clutch; a cylinder is fixedly mounted to a disk carrier and with a shaft segment portion provided with a radial shaft bore for supplying lubricating oil for the clutch; wherein an axial piston operating in the cylinder is connected with a lubricating valve to release a stream of lubricating oil from a large oil retaining baffle chamber, connected with the radial shaft bore, to the disk stack, when the clutch is engaged; and wherein the piston abuts the shaft segment portion and is biased by return springs; and wherein the lubricating valve being structurally disposed in a wall of the baffle and operably connected between the baffle chamber and the clutch chamber containing the disk stack.

Pressure medium-adjusting member for the actuation of a lamelae-clutch

A drive arrangement is provided for a motor vehicle in which a hydrodynamic torque converter is installed in the transmission between an engine and a handshift gear box. The hydrodynamic torque converter is equipped with a stop clutch which is responsive to the rotational velocity of the torque converter. The stop clutch engages when the engine and the torque converter are stopped. After the engine is started, the stop clutch automatically unlocks the component parts of the torque converter, thereby allowing relative rotational movement of the engine crankshaft and the vehicle gearshaft. This arrangement provides a parking brake effect when the gearbox is shifted into a gear.

Drive arrangement for a motor vehicle

A control arrangement for an automatic change-speed transmission which is series-connected with an output of a driving engine. A gearshift control slide valve, a manually operable range selection control slide valve, and a gear-holding control slide valve operating in dependence upon a modulating control pressure related to the torque of the driving engine are connected in such a manner that the gearshift control slide valve is held in a position for a higher gear if the driving engine is in an idling position and the range selection control slide valve is in a position for a forward gear range. A downshift control member, operable by a control linkage of a power control of the driving engine affects the modulating pressure to be made effective at the gear-holding control slide valve in such a manner that, upon operating the control linkage from an idling position, the gear-holding control slide valve and gearshift control slide valve are brought into their positions for the lowest gear. A pressure regulating valve adjusts a vacuum pressure effective on a modulating pressure control slide valve in dependence upon positions of the control linkage, and the downshift control member affects the vacuum pressure to be brought to bear on the modulating pressure control slide valve.

Growing community of inventors

Waiblingen, Germany

Gunter Jurgens