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 |
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 |
20090170659 | METHOD FOR OPERATING AN AUTOMATIC FRICTION CLUTCH - A method for operating an automated friction clutch in which a clutch load, corresponding to an energy input, is determined and the operation of the clutch is controlled as a function of the clutch load determined. Glazing of the clutch lining that results from too low an energy input, in relation to the slipping operation time of the clutch, is compensated by a specific increase of the clutch load, while premature wear is prevented by a specific reduction of the clutch load. | 07-02-2009 |
20090192016 | CLUTCH ACTUATOR AND METHOD FOR ACTUATING A CLUTCH - A clutch plate ( | 07-30-2009 |
20090261763 | METHOD OF DETECTING A USEFUL SIGNAL - A method of detecting a useful signal from a measurement signal that is overlaid by at least one interference signal for use in a control or regulating device, where the interference signal occurs with at least one known interference signal frequency. The method including the steps of detecting the measurement signal, performing a Fourier transformation on the measurement signal with reference to the interference signal frequency to detect the interference signal amplitude and phase, detecting the interference signal on the basis of the interference signal amplitude and phase, and removing the interference signal from the measurement signal to detect the useful signal. The Fourier transformation is performed only with reference to the known interference signal frequency to simplify the computation making it possible to detect the useful signal in real time. | 10-22-2009 |
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 |
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 |
20100108461 | METHOD AND ARRANGEMENT FOR DETERMINING THE WEAR CONDITION OF A SHIFTING CLUTCH - A method of determining the wear condition of a shifting clutch ( | 05-06-2010 |
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 |
20120220421 | METHOD FOR CONTROLLING A ROLLING OR COASTING FUNCTION OF A VEHICLE - A method is proposed for controlling a through-connection clutch of a vehicle, in which an interlocking portion of the clutch is opened when the drive-train is virtually free from torque, a shifting operation is then carried out, and after the shifting operation the clutch is closed again. According to the invention, the torque transmitted by the interlocked connection in the clutch is influenced by controlling the motor in order to produce a torque-free condition at the interlocked connection in the clutch, in such manner that the interlocked connection is pre-stressed before the torque-free condition has been reached and separated immediately only when the torque-free condition is reached. | 08-30-2012 |
20120234641 | THROUGH-CONNECTION CLUTCH AND METHOD FOR THE ACTUATION THEREOF - A through-connection clutch, for transferring torque between a motor and transmission of a vehicle, which has a friction clutch and a form-locking clutch. The form-locking clutch is disposed radially within the friction clutch, and the clutches can be actuated independently of each other. To minimize the required installation space, the through-connection clutch can be activated flexibly, but is still inexpensive to produce and ensures low-wear yet safe and comfortable torque transfer in a drive train of a vehicle. A pressure plate of the friction clutch and a form-locking element of the form-locking clutch are concentric, rotationally fixed together, and movable toward one another, and can be actuated via an actuation unit, which is rotationally decoupled from the pressure plate and the form-locking element. Depending on the operating situation, the friction clutch and/or the form-locking clutch is selectively activated one or more times. | 09-20-2012 |
20130298757 | METHOD FOR CONTROLLING AN ACTUATOR - A method of controlling a pneumatic actuator for actuation of a pneumatically actuated device. The actuator comprises a piston and a pneumatic cylinder, the piston is arranged to move axially within the pneumatic cylinder. The piston is moved as a function of a pressure in a pressure chamber of the pneumatic cylinder, and the pressure in the pressure chamber is adjusted by a control unit which controls at least a valve and/or a pressure regulator and/or a pressure generating device. A pilot control component, for the control, is determined as a function of at least a sliding friction force and/or at least a static friction force of the pneumatic actuator. | 11-14-2013 |