| Patent application number | Description | Published |
|---|
| 20080256942 | Hydraulic system and automatic gearbox - A hydraulic system including a multi-flow hydraulic pressure supply unit, especially a dual-flow hydraulic pressure supply unit, such as a pump, by which a volumetric flow of pressurized fluid is supplied to a hydraulic-fluid-operated device. A valve arrangement is provided either for switching between the individual pump flows or for interconnecting the individual pump flows. | 10-23-2008 |
| 20090011899 | Method and device for adjusting the friction coefficient of a friction clutch situated in a hybrid power train - A method for adjusting the friction coefficient of a friction clutch situated in a hybrid power train between an electric machine and a combustion engine, actuated by a clutch actuator, the friction coefficient is adjusted by a torque transmitted by the friction clutch, which is determined when starting the combustion engine by the electric machine. | 01-08-2009 |
| 20090017988 | Method for controlling a starting clutch - A method for actuating a starting clutch in the power train of a hybrid vehicle, where during a starting phase of the combustion engine by means of an electric machine the starting clutch operating between them is engaged in a first starting phase by means of a pre-control and in a second starting phase depending on the acceleration of the crankshaft of the combustion engine. | 01-15-2009 |
| 20090218190 | CLUTCH SYSTEM - The clutch system relates to an automatic friction clutch with a hydrostatically actuator-controlled clutch withdrawal. In such clutch release systems, a slave cylinder pressurized by a master cylinder in an engaged state is in connection with a reservoir (tank) via a connection opening uncovered by the master cylinder piston. To determine the opening deviations and location of the connection opening, it is proposed that actuation of master cylinder be velocity-dependent and pressure patterns of the hydrostatic clutch release system be evaluated. | 09-03-2009 |
| 20100145588 | CREEPING PROCESS - A process and apparatus for controlling the creeping process of a motor vehicle. The nominal creeping speed can be adapted. | 06-10-2010 |
| 20110112738 | PROCESS FOR DETECTING TUNING MEASURES - The invention relates to a process for detecting tuning measures through which the actual output power of an internal combustion engine of a motor vehicle is increased relative to design output power value, whereby, to detect the tuning measures, deviations of actual output power value from a nominal output power value are evaluated, the latter being provided by a control device. | 05-12-2011 |
| 20120115681 | METHOD FOR CONTROLLING A FRICTION CLUTCH - A method for controlling a friction clutch operatively arranged between a drive unit and a gearbox. The method includes the steps of detecting torque transmitted by the friction clutch, determining a coefficient of friction between friction linings of a clutch disk and antifriction surfaces of the friction clutch, and evaluating the functional capability based on the determined coefficient of friction. In order to avoid an evaluation of a friction clutch that has not yet been broken-in as a worn friction clutch, the evaluation is postponed during a specified breaking-in phase of the friction clutch. | 05-10-2012 |
| 20120129652 | METHOD FOR CONTROLLING AN INCHING PROCEDURE OF A MOTOR VEHICLE - A method for controlling an inching procedure of a motor vehicle, which has at least one friction clutch arranged between a drive unit and a transmission. The torque of the clutch is specified by a control unit and set by a clutch actuator. If the brake and load lever are not actuated, a multi-stage is started by an torque set by the clutch. To perform the process, the torque is increased up to a specified maximum limit to reach a specified speed in a first stage. A specified time period is waited in a second stage if the specified speed does not reached the maximum limit. The torque is increased by a specified value in a third phase if the specified speed is not reached, and the torque is reduced in a fourth stage and a driver warning is output if the specified speed again is not reached. | 05-24-2012 |
| 20120160046 | DRIVE TRAIN HAVING CLUTCH ACTIVATION FOR OVERCOMING THE BACKLASH OF THE DRIVE TRAIN BEFORE START-UP - A drive train for a motor vehicle, including a drive unit having a drive shaft and a transmission having a transmission input shaft and a plurality of gears, of which at least one is used as a starting gear for the motor vehicle, and having a friction clutch, which is arranged between the crankshaft and the transmission input shaft and is actuated in an automated manner. In order to prevent start-up noise caused by backlashes in the motor vehicle, a backlash present in the transmission is compensated by applying a small compensating torque set at the friction clutch to the transmission input shaft while the starting gear is engaged before start up. | 06-28-2012 |
