Patent application number | Description | Published |
20090099810 | METHOD FOR FAULT DETECTION IN AN ACTUATOR - A method for detecting fault in an actuator. By transmitting a control value, which is generated by a control unit, to an input of the actuator a signal for the measured actuator position is produced at the output of the actuator. The signal for the measured actuator position is sent to an input of a signal conditioning unit which determines from it a measure of actuator movement. The control value is also transmitted to an input of a modeling unit, which calculates from it an expected measure of actuator movement. These movements are sent to a computer unit, which produces a corresponding status signal for the functionality of the actuator and for the functionality of the sensor for determining the actuator position. | 04-16-2009 |
20100151991 | METHOD FOR OPERATING AN AUTOMATIC TRANSMISSION - A method of operating an automatic transmission of a motor vehicle. The automatic transmission, when the motor vehicle is driven with an actuated accelerator and an engaged starting clutch, and then coasts with the accelerator not actuated and the starting clutch engaged, during coasting with the engaged starting clutch the transmission remaining in the gear in which it was previously driven with the gas pedal actuated. When the transmission input speed of the automatic transmission drops below a limit value, during coasting, the starting clutch is disengaged. During coasting with a disengaged starting clutch in the automatic transmission, a gear is shifted that matches the current speed of the motor vehicle so that, when the starting clutch is subsequently engaged, a gear is available that matches the speed of the motor vehicle prevailing at the time the starting clutch is subsequently engaged. | 06-17-2010 |
20100185368 | METHOD AND DEVICE FOR CONTROLLING A COASTING MOVEMENT OF A VEHICLE - From a point when the clutch is disengaged, a braking torque is applied in addition to the braking torque of the drivetrain located downstream from the clutch. The braking torque of the drivetrain downstream from the clutch comprises, for example, a drag torques of the transmission, an axle and/or one or more brakes. The added braking torque applied corresponds to the braking torque of the internal combustion engine at, or immediately before, the instant when the internal combustion engine is decoupled from the drivetrain downstream from the clutch by disengaging the clutch. By applying the additional braking torque to the drivetrain downstream from the clutch, the total braking torque that acts on the wheel, before and after the disengagement of the clutch, remains the same. The vehicle can therefore coast or stop in a smooth manner. | 07-22-2010 |
20110219900 | METHOD FOR RUNNING A DRIVE LINE - A method of operating a powertrain may include providing an automatic transmission disposed between a drive unit and an axle drive. One input shaft of the automatic transmission is connected by means of an operable clutch to the drive unit and an output shaft of the automatic transmission is connected to the axle drive. A transmission-side, mobile auxiliary drive is configured to couple with a transmission-side connection. The transmission-side connection point for the auxiliary drive is decoupled from the axle drive and, at least partially from the drive unit. The rotational rate of the transmission-side connection point for the auxiliary drive and the auxiliary drive are synchronized, whereby the auxiliary drive is coupled to the connection point. The transmission-side connection point for the auxiliary drive, and thereby the auxiliary drive, is coupled to the drive unit as well as the axle drive. | 09-15-2011 |
20110224855 | METHOD FOR RUNNING A DRIVE LINE - A method for operating a powertrain of a motor vehicle may comprise: providing a powertrain comprising an automatic transmission arranged between a drive unit and an axle drive, wherein an input shaft of the automatic transmission is connected with the drive unit by means of a controllable clutch and an output shaft is connected with the axle drive, and wherein the powertrain comprises also a gearbox-sided, transient auxiliary drive that is selectively connected for activating or engaging a gearbox-sided connecting point or disconnected for deactivating or disengaging from the connecting point; determining, when the gearbox-sided transient auxiliary output is activated or engaged, a load to be borne at the performance of a gearshift; and specifying, depending on the determined load, whether the gearshift is going to be performed and what synchronous elements of the powertrain are being used to perform the gearshift. | 09-15-2011 |
20120055752 | METHOD OF RESOLVING A TOOTH-ON-TOOTH SITUATION - A method for releasing a tooth-on-tooth position of an interlocking shift element ( | 03-08-2012 |
20130040779 | GEARSHIFT CONTROL METHOD FOR A MOTOR VEHICLE - A gearshift control method for a motor vehicle whose drive train comprises a turbo-charged combustion engine, a startup clutch and a shift clutch and an automatic stepped transmission, in which drive engine torque deficiencies, that occur during the build-up of load at the end of a tractive upshift, are avoided without assisting the engine with an additional device or increasing the charge pressure. The method provides that the engine accelerates at the earliest, after the disengagement of the load gear, and at the latest, at the start of the load build-up after the engagement of the target gear up to the boost threshold speed or an engine speed which is slightly above the boost threshold speed, and is loaded, during the load build-up, with a largely constant engine speed beyond the intake torque of the engine to nearly the full load torque, before slipping of the friction clutch ends. | 02-14-2013 |
20130053216 | METHOD FOR CARRYING OUT A GEAR SHIFTING OPERATION IN AUTOMATED TRANSMISSIONS - A method of performing a shift operation in an automatic transmission with at least one form-locking shifting transmission part of a vehicle, with which, during a shift to a target gear (G | 02-28-2013 |
20130197769 | METHOD FOR CONTROLLING SHIFTS IN A VEHICLE TRANSMISSION - A method of controlling shifts in a vehicle transmission, for example a utility vehicle, having a transmission or partial transmission designed as a dual-clutch transmission that shifts as a without traction force interruption. The transmission comprises a dual clutch having a first clutch and a second clutch that are functionally connected to a drive engine, and a transmission or partial transmission comprises a main transmission that shifts with traction force interruption and is connected to a drive-train downstream from the dual-clutch transmission. During shifts in the main transmission that is connected downstream from the dual-clutch transmission, the dual clutch is operated, by pre-loading the two clutches, as a transmission brake and/or an engine brake for adapting the speed of components to be shifted so as to enable short shifting times and ensure comfortable and reliable driving operation. | 08-01-2013 |
20130203555 | METHOD FOR CONTROLLING SHIFTING OF A PARTIAL DOUBLE CLUTCH TRANSMISSION - A method of controlling shifting in a transmission having a first partial transmission, designed as a dual-clutch transmission, which comprises first and second clutches by which the dual-clutch transmission can be functionally connected to a turbocharged internal combustion engine. A second partial transmission is arranged in the drive-train, downstream of the dual-clutch transmission, which is in the form of a main transmission that shifts with traction force interruption. To at least reduce traction power loss of the turbocharged engine after a traction shift, during a traction shift involving a gearshift in the main transmission, the clutches are at least partially engaged so as to be braced against one another and produce a torque that acts in opposition to the drive engine by virtue of which, during the traction shift, the supercharge pressure of the drive engine is largely maintained, or at least built up shortly after the traction shift. | 08-08-2013 |
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 |
20140088843 | METHOD FOR ADAPTING SHIFTS IN A MOTOR VEHICLE TRANSMISSION - A method provides for adapting shifts to be carried out in a transmission of a motor vehicle. The shifts are triggered by a transmission control unit and are is controlled and/or governed by the transmission control unit. An actual value corresponding to an acceleration of the motor vehicle is recorded by measuring instruments and is compared to a corresponding target value. On the basis of a deviation between the actual value and the target value, the carrying out of the subsequent shifts of the transmission control unit is adapted. The actual value corresponding to an acceleration of the motor vehicle is individually recorded for several consecutive shift stages of each shift, whereas the actual value in the individual shift stages is compared to the target value in the individual shift stages of the transmission control unit. On the basis of a deviation in the individual shift stages between the actual value and the target value, the carrying out of the subsequent shifts of the transmission control unit is individually adapted for each shift stage. | 03-27-2014 |
20140121912 | METHOD FOR INITIALIZING THE MASS OF A MOTOR VEHICLE - A method of initializing the mass of a motor vehicle, in particular when the motor vehicle is re-started or when it is at rest, for the control of a starting process of the motor vehicle. From measured and/or calculated operating parameters of the motor vehicle, an operating situation of the motor vehicle is determined and, on the basis of the operating situation determined and as a function of operating situation dependent loading and/or unloading patterns, the mass of the motor vehicle is initialized. | 05-01-2014 |
20140171263 | METHOD FOR SHIFT CONTROL OF AN AUTOMATED GROUP GEAR - A method of controlling a shift of an automated group gearbox having a multi-step main transmission and a trailing two-step range group. An input shaft of the main transmission is driven by a drive device. The main transmission and a range group have synchronization devices with shift clutches. Each synchronization device, for the main transmission, has two shift positions for respective gear ratio steps and a neutral position and the range group synchronization device has only two shift positions to shift between two gear ratios steps. To accelerate range shifts, when synchronizing the range group, the main transmission input shaft is synchronized by controlling external synchronization aids to a target rotational speed at which either after the synchronization and shifting of the gear ratio step of the range group or independently from the current synchronization condition of the range group, the target gear ratio is engaged in the main transmission. | 06-19-2014 |
20140309901 | CONTROL DEVICE OF A MOTOR VEHICLE AND METHOD FOR OPERATING SAME - A control device for a motor vehicle such that during a driving direction change from an original direction and/or during a starting process and/or during a stopping process and/or during a rolling process, in order to assist with the driving direction change and/or starting process and/or stopping process and/or rolling process, an appropriate control signal is provided by the control device to automatically activate a service brake. The control device automatically determines the friction energy produced at a starting clutch, during the driving direction change and/or starting process and/or stopping process and/or rolling process, without activation of the service brake. The control device only automatically activates the service brake, to assist with the driving direction change and/or starting process and/or stopping process and/or rolling process, if the determined friction energy exceeds a limit value. | 10-16-2014 |