| Patent application number | Description | Published |
|---|
| 20080248922 | Process and Device for Controlling a Gearsift of an Automatic Gearbox - The present invention relates to a method for controlling an automatic transmission, which allows a gear change and, here in particular, downshifting with minimum traction interruption while the phase of reduction of the drive torque of the drive motor, the phase interruption of the frictional connection phase in the automatic transmission, and the phase of rotational speed adjustment in the transmission input shaft are designed for a suitable target rotational speed such that they overlap at least in part. In particular, with interruption of the frictional connection in the automatic transmission, the drive motor transmits a drive torque to the input shaft of the automatic transmission via the main clutch, which achieves a change in the rotational speed of the input shaft of the transmission (n_ge) in the direction of the synchronous speed of the new gear. The present invention also relates to an apparatus to carry out this method. | 10-09-2008 |
| 20090101464 | METHOD FOR CONTROLLING AN AUTOMATED FRICTION CLUTCH - A method for controlling an automated friction clutch arranged in a drive train of a motor vehicle in the force flow between a drive engine ( | 04-23-2009 |
| 20090247357 | METHOD FOR ACTIVATING AN ACTUATING MEANS - A method for controlling an actuating device in an automated shifting system of a motor vehicle. The position of the actuating device is determined by a path measurement system. The actuating device can be controlled by a pressure regulation device, including a pressure medium reservoir, at least two pressure lines and a switching valve for connecting a first pressure line to a pressure medium line leading to the pressure chamber of the actuating device, and a pressure regulating device for adapting the pressure level of the main pressure line to the control pressure level of the actuating device. By appropriately controlling the pressure regulation device before the piston of the actuating device moves in the intended direction, it is moved in the direction opposite to the intended movement direction. When this movement direction is registered the movement direction is changed to the intended movement direction. | 10-01-2009 |
| 20090312929 | METHOD AND DEVICE FOR IDENTIFYING A PASSIVE ROLLING MOMENT OF A MOTOR VEHICLE - Method for identifying a passive rolling moment of a motor vehicle ( | 12-17-2009 |
| 20100041513 | METHOD FOR OVERCOMING TOOTH BUTT CONDITIONS WHEN ENGAGING GEARS IN TRANSMISSIONS - The present invention relates to a method for overcoming tooth butt conditions (ZaZ) when engaging gears in transmissions. A sensitive adjustment of the clutch to apply torque for rotating the drive shaft of the transmission in order to overcome tooth butt conditions has certain limits because of the proportion of the power required and desired for making said sensitive adjustment. This may cause unpleasant jerking of the vehicle or a clearly audible locking noise of the involved positively connected elements and undesired mechanical stress to said elements. | 02-18-2010 |
| 20100042299 | METHOD FOR CARRYING OUT A SHIFT OF GEARS OF AN AUTOMATIC TRANSMISSION - A method for shifting gears of an automatic transmission of a vehicle, by way of primarily form-locking shifting elements, while driving with or without utilization of a clutch depending on a decision made by a decision device which, in the presence of certain basic conditions, causes disengagement of a starting gear without disengaging the clutch, and subsequently reads in data about the size and the progression of a quantity correlating closely with the rotational speed of an output shaft of the automatic transmission and, with inclusion of this data, determines the shifting mode for engagement of the target gear. The method concerns early and slight adjustment of the clutch, preferably as a function of the degree of load reduction, just before determination of the shifting mode, without slippage of the clutch. | 02-18-2010 |
| 20100319485 | AUTOMATIC GROUP TRANSMISSION - An automated group transmission having a multi-stage main transmission (HG), a splitter group (VG) connected upstream from the main transmission (HG) and a two-stage range-change group (BG) connected downstream of the main transmission (HG), such that the splitter group (VG) is connected, via a controllable separator clutch, to a drive motor. The main transmission (HG) and the range-change group (BG) are of either a synchronized or an unsynchronized design and the shifting clutches of two respective transmission ratio steps, in at least one of the partial-transmissions (VG, HG, BG), are respectively combined in a common shifting packet with two shift positions and a neutral position. To speed up most range shifts, it is provided that in the main transmission (HG) the shifting clutches associated with the lowest transmission ratio step (G | 12-23-2010 |
| 20100323845 | SHIFT CONTROL METHOD FOR AN AUTOMATIC GROUP TRANSMISSION - A method for controlling shifts in an automated group transmission that comprises a multi-stage main transmission, a multi-stage splitter group connected upstream from the main transmission and a multi-stage range-change group connected downstream from the main transmission. The method includes the steps of disengaging the separator clutch to relieve the load of the motor; shifting range-change group to neutral and bringing the speed of the motor to the synchronous speed of the target gear; braking the main transmission and the splitter or upstream group via a transmission brake; changing the transmission ratios in the main transmission and in the splitter group; synchronizing the range-change group by partially engaging the separator clutch; engaging the desired transmission ratio in the range-change group; and simultaneously increasing the load on the drive motor and fully engaging the separator clutch. | 12-23-2010 |
