| Patent application number | Description | Published |
|---|
| 20080242507 | Device For Actuating a Diaphragm Spring Clutch For Vehicles - The invention concerns a device for actuating a diaphragm spring clutch ( | 10-02-2008 |
| 20090005942 | Method for Controlling an Automatic Transmission - An automatic transmission control method in which at least one of a starting clutch, a clutch coupling and transmission elements, for selection as well as engagement and disengagement of a gear step, are determined as a function of respectively existing variables representing the driving situation as well as the driver's wishes can be activated by actuators which are controlled by a control and regulation device. The method comprising the steps of collecting and normalizing the input variable into standard input variables; weighting with weighting factors and summarizing; converting the weighted input variables into intermediate variables; selecting a specific range of values which represents a specific shifting sequence; and implementing the shifting operation. | 01-01-2009 |
| 20090090591 | METHOD FOR DETERMINING A TORQUE CHARACTERISTIC OF AN AUTOMATED FRICTION CLUTCH - A method for determining a torque characteristic of a friction clutch located in a drive train of a motor vehicle in the force flow between a drive engine and a transmission and which is closed in its rest position. At least two marker points of a regulating-path-dependent torque characteristic are determined, one of which is determined at a slipping limit of the clutch. To enhance determination of the torque characteristic, a first marker point is determined with the clutch engaged, the transmission in neutral and the engine running, by slowly disengaging the clutch until a reduction in the speed of the transmission input shaft relative to the engine speed is detected. A corresponding pair of values of this marker point with the known braking torque of the input shaft and the set position are used for adapting an existing characteristic. | 04-09-2009 |
| 20090203480 | DEVICE FOR CONTROLLING A FLUID-ACTIVATED DOUBLE-ACTION OPERATING CYLINDER - A device for controlling a fluid-actuated, double-action operating cylinder ( | 08-13-2009 |
| 20090281700 | METHOD FOR CONTROLLING AN AUTOMATED FRICTION CLUTCH - A method of controlling an automated friction clutch in a drivetrain of a motor vehicle between a drive motor and a manual transmission. During clutch actuation, at least one operating parameter of the friction clutch is detected by a sensor and from variation of the operating parameter at least one adaptation parameter is derived for correcting a control parameter of the associated clutch control element. To obtain information about variation of the clutch release force and to improve the control of an associated clutch control element, the friction clutch is fully disengaged with constant control or actuation of the clutch control element. During the disengagement process, the release travel path is determined as a function of release time, and from the time variation of the release travel path, a characteristic value is determined which is used to determine an adaptation parameter for correcting the control parameter of the clutch control element. | 11-12-2009 |
| 20090312928 | METHOD FOR MONITORING A STARTING PROCESS OF A MOTOR VEHICLE - The invention relates to a method for monitoring a starting process of a motor vehicle, having a drive train, with a driving motor, a torque transfer system, and a transmission, a controller, and an actuator controlled by the controller for actuating the torque transfer system. If a starting observer detects that, despite a clear starting request, no starting occurs, appropriate measures supporting the starting of the motor vehicle are thereupon initiated. | 12-17-2009 |
| 20100016119 | CLUTCH SYSTEM - A clutch system for producing and interrupting a force flow between the engine and transmission of a motor vehicle, with a clutch, which is disengaged unless actuated, and one or more valves, which regulate the flow of pressure medium and which are electrically actuated by a control and regulation unit. If there is electrical failure while driving and when a gear is engaged or when the vehicle is stationary, the engine is running and a transmission gear is engaged, unintended clutch engagement is prevented. The valves are designed such that if there is a failure of the voltage supply and consequently also of the actuation of the valves by the electronic control and regulation system, the operating condition of the clutch existing at the time of failure, namely the disengaged or engaged operating condition, remains as it is. | 01-21-2010 |
| 20100113218 | METHOD FOR CONTROLLING AN AUTOMATED FRICTION CLUTCH - A method of controlling an automated friction clutch arranged in a drivetrain of a motor vehicle in the force flow, between a motor and transmission, and the automated friction clutch is designed to be passively engaged by spring pressure and can be disengaged and engaged by a controllable clutch actuator. The automated friction clutch is provided with a path sensor for detecting the clutch actuator travel such that during the operation of the motor a current key point of a torque characteristic, provided for controlling the friction clutch, is determined and used for adapting the torque characteristic. With the friction clutch engaged and without the clutch actuator exerting any force, several values of the actuator travel are determined at intervals from which a current engagement point, close to the actual engagement point of the torque characteristic, is determined and with which the torque characteristic is adapted. | 05-06-2010 |
| 20100151992 | PROCEDURE FOR CONTROLLING A HYDRAULIC OR PNEUMATIC TRANSMISSION CONTROL UNIT - A method of monitoring a hydraulic or pneumatic transmission control system, which comprises a pressure supply unit with a conduit directing a pressure medium under a supply pressure, and an actuating member for a clutch control element of a friction clutch. The actuating member has a pressure space which can be connected by a clutch control valve to the conduit, and in which the supply pressure is determined by a pressure sensor that can be connected to the conduit. The method includes the steps of determining the supply pressure by the pressure sensor, given that briefly opening the clutch control valve produces a pressure increase and/or a pressure gradient of the control pressure in the pressure space, and the currently existing supply pressure can be calculated from the control pressure, the pressure increase and/or the pressure gradient. | 06-17-2010 |
| 20100152985 | METHOD AND DEVICE FOR CONTROLLING THE DEGREE OF ENGAGEMENT OF AN AUTOMATIC OR AUTOMATED MOTOR VEHICLE CLUTCH - A method and a device for controlling an automatic or automated clutch ( | 06-17-2010 |
| 20100185372 | METHOD FOR ACTUATING A CLUTCH OF A DRIVETRAIN - A method for actuating a clutch ( | 07-22-2010 |
| 20100185373 | METHOD AND DEVICE FOR DETERMINING AND DAMPENING JUDDERING VIBRATIONS OF A DRIVETRAIN - A method of determining and reducing vibrations caused by a clutch ( | 07-22-2010 |
| 20100191431 | METHOD FOR OPERATING A DRIVETRAIN - A method for operating a drivetrain comprising an automatic transmission ( | 07-29-2010 |
| 20100204010 | METHOD AND DEVICE FOR CONTROLLING A CLUTCH - A method and a device for controlling a clutch, for example an automatic friction clutch forming part of a drive train of a motor vehicle, for a torque transfer between an engine and a transmission, with the clutch having significant clutch way points assigned to it. For achieving the operational readiness of the clutch over the shortest possible time period, whereby an accurate clutch adjustment is still guaranteed, a clutch way point coordinate system is monitored by checking the point of engagement of the clutch, established through a learning process and having at least a relevant clutch way point for the starting procedure. In case of any recognized change(s), the clutch way point is suitably corrected or otherwise used as is. | 08-12-2010 |
