Abstract: A system for cooling a hot rail of rail steel to a fine perlitic or ferritic or perlitic/ferritic structure has a plurality of separate cooling modules with independently adjustable cooling parameters. The rail is guided downstream through the modules of the cooling stretch and through intermediate zones between the modules so as to cool the surface of the rail in each of the modules and to subject the rail to destressing or stress relief between the modules. Sensors in each of the intermediate zones detect the actual surface temperature of the rail in the respective zones, and a controller connected to the modules and to the sensors varies the cooling parameters of the cooling modules in dependence on the detected temperatures in the respective upstream zones to ensure a defined temperature in the rail that lies above a critical temperature at which bainitic structure components are formed.

Abstract: An automatic friction clutch in a drive train of a motor vehicle is controlled to transfer a clutch torque that includes an engine torque-dependent component and a clutch slip-dependent component.

Abstract: The invention relates to a method of releasing a reel awe, which is hydraulically restrained by a self-locking effect by means of inwardly located wedge surfaces of expansion elements. Removal of a coil from a reel awe is achieved, without problems, by lifting off the self-locking effect of the expansion elements at least partially or completely by applying longitudinal vibrations acting in an axial direction. The invention also relates to a correspondingly formed device.

Abstract: The invention relates to a method of releasing a reel awe, which is hydraulically restrained by a self-locking effect by means of inwardly located wedge surfaces of expansion elements. Removal of a coil from a reel awe is achieved, without problems, by lifting off the self-locking effect of the expansion elements at least partially or completely by applying longitudinal vibrations acting in an axial direction. The invention also relates to a correspondingly formed device.

Abstract: A method for controlling a drive train of a motor vehicle, to a method for controlling a clutch device, and to a drive train of a motor vehicle, the drive train being operated in a normal load operation, in which the internal combustion engine moves the motor vehicle against the resistances opposing the movement of a motor vehicle, the play in the load direction pre-determined by the rotary direction of the motor output shaft being closed. The drive train (40) operating outside normal load operation is operated under pre-determined conditions in a second operating mode in which a first load is introduced into a drive train section, causing the play at the drive-end of the load introduction point to be closed or to remain closed, the first load being such that it would not be sufficient to overcome the resistances opposing the movement of the motor vehicle in the plane.

Abstract: A method for referencing an incremental travel sensor in an electronically controlled actuation device of a clutch in the drive train of a traveling vehicle, the actuation device containing a memory in which a characteristic curve is stored that indicates the clutch torque as a function of the position of an actuation element, the method comprising the following steps: determining whether the clutch is slipping beyond a given threshold; if so, determining the current clutch torque; and determining the current position of the actuation element based on the current clutch torque and the characteristic curve. Additional methods are specified that facilitate a referencing according to requirements.

Abstract: The invention relates to a method and device for securely and comfortably operating a drive train of a motor vehicle, especially for operating a drive train with several clutches.

Abstract: In order to obtain a fine-lamellar perlite structure in the edge region of the heads of rails (1), especially hot-rolled rails for carriageways or railways, by specific thermal treatment during cooling from the rolling heat without the formation of bainite, precooling (12) occurs in order to achieve a core temperature of approximately 750-850° C., and the temperature of the more intensively cooled edge region is raised by intermediate heating (13) to at least said core temperature and finally cooled (14).

Abstract: Methods and devices for actuating a parking brake in a gearbox which is actuated in an automated manner, whereby gear changes are carried out using at least one electrically driven actuator, gear positions can be selected by using a selector device, and the parking brake can be activated by using the selector device when the vehicle is stationary or moving slowly. A vehicle provided with an additional gearbox. An ignition key can only be removed, when the gearbox is in a P state and the additional gearbox is not in the N state. A further method and device, whereby the additional gearbox can only be shifted in the N state when the gearbox is not in the P state. Further methods and a device in which automated manual gearboxes, especially parallel gearboxes, are controlled in such a way that the vehicle can be safely parked.

Abstract: An automatic friction clutch, contained in the drive train of a motor vehicle is controlled such that a preset clutch torque can be transmitted. The preset clutch torque is composed of a pilot clutch torque M and a clutch torque Msr, which is dependent on slip.

Abstract: In a method for referencing a control device, containing an incremental sensor, of a shift actuator of an automatic transmission, a clutch that is controlled by a clutch actuator and causes a transmission of torque between the drive motor and at least one vehicle wheel in a drive train containing the transmission of a motor vehicle is adjusted so that it transfers a lower torque when a shift actuator of the control device is operated in the direction of engaging a gear for the purpose of referencing the transmission.

Abstract: An automatic friction clutch in a drive train of a motor vehicle is controlled to transfer a clutch torque that includes an engine torque-dependent component and a clutch slip-dependent component.

Abstract: The invention relates to a method for controlling a drive train (40) of a motor vehicle (42), to a method for controlling a clutch device (46), and to a drive train of a motor vehicle (42), said drive train (40) being operated in a first operating mode, the normal load operation, in which the internal combustion engine (44) moves the motor vehicle (42) against the resistances opposing the movement of a motor vehicle (42), the play in the load direction pre-determined by the rotary direction of the motor output shaft (78) being closed. The drive train (40) operating outside said normal load operation is operated under pre-determined conditions in a second operating mode in which a first load is introduced into a drive train section, causing the play at the drive-end of said load introduction point to be closed or to remain closed, said first load being such that it would not be sufficient to overcome the resistances opposing the movement of the motor vehicle (42) in the plane.

Abstract: A method for controlling a drive train (40) of a motor vehicle (42), to a method for controlling a clutch device (46), and to a drive train of a motor vehicle (42), said drive train (40) being operated in a first operating mode, the normal load operation, in which the internal combustion engine (44) moves the motor vehicle (42) against the resistances opposing the movement of a motor vehicle (42), the play in the load direction pre-determined by the rotary direction of the motor output shaft (78) being closed. The drive train (40) operating outside said normal load operation is operated under pre-determined conditions in a second operating mode in which a first load is introduced into a drive train section, causing the play at the drive-end of said load introduction point to be closed or to remain closed, said first load being such that it would not be sufficient to overcome the resistances opposing the movement of the motor vehicle (42) in the plane.

Abstract: The methods and devices for actuating a parking brake in a gearbox which is actuated in an automated manner, whereby gear changes are carried out by means of at least one electrically driven actuator, gear positions can be selected by means of a selector device, and the parking brake can be activated by means of the selector device when the vehicle is stationary or moving slowly. The invention also relates to a vehicle provided with an additional gearbox. The ignition key can only be removed, when the gearbox is in the P state and the additional gearbox is not in the N state. The further method and device, whereby the additional gearbox can only be shifted in the N state when the gearbox is not in the P state. The methods and a device for carrying out the same, by automated manual gearboxes, especially parallel gearboxes, are controlled in such a way that the vehicle can be safely parked and can set off in a reliable and comfortable manner.

Abstract: In a method for referencing a control device, containing an incremental sensor, of a shift actuator of an automatic transmission, a clutch that is controlled by a clutch actuator and causes a transmission of torque between the drive motor and at least one vehicle wheel in a drive train containing the transmission of a motor vehicle is adjusted so that it transfers a lower torque when a shift actuator of the control device is operated in the direction of engaging a gear for the purpose of referencing the transmission.

Abstract: A method for automatically adjusting slip in an automatic friction clutch arranged between an engine and a gearbox of a motor vehicle. The clutch has a clutch-adjusting positioning drive which adjusts the clutch to a position which is defined by a position set-point signal. The clutch input speed and the clutch output speed are detected using speed sensors and a position set-point signal is produced according to the difference of the speeds (slip speed). The slip speed is equal to a predefined set slip value and is used as a control variable for the transmitted clutch torque. An engine torque is used as a control variable for the clutch instead of the clutch torque or as a complement thereto.

Abstract: A system for controlling a component of a gear in a vehicle, especially a clutch, through a hydraulic transmission link. The system includes a transmission control unit and an engine control unit, whereby a loss in fluid in the transmission link can be detected or a hazardous situation caused by the potential for fluid loss is avoided, whereupon the engine and/or the transmission can be suitably controlled using the transmission control and/or engine control unit.

Abstract: The invention relates to a method for controlling a drive train (40) of a motor vehicle (42), to a method for controlling a clutch device (46), and to a drive train of a motor vehicle (42), said drive train (40) being operated in a first operating mode, the normal load operation, in which the internal combustion engine (44) moves the motor vehicle (42) against the resistances opposing the movement of a motor vehicle (42), the play in the load direction pre-determined by the rotary direction of the motor output shaft (78) being closed. The drive train (40) operating outside said normal load operation is operated under pre-determined conditions in a second operating mode in which a first load is introduced into a drive train section, causing the play at the drive-end of said load introduction point to be closed or to remain closed, said first load being such that it would not be sufficient to overcome the resistances opposing the movement of the motor vehicle (42) in the plane.

Abstract: A method for referencing an incremental travel sensor in an electronically controlled actuation device of a clutch in the drive train of a traveling vehicle, the actuation device containing a memory in which a characteristic curve is stored that indicates the clutch torque as a function of the position of an actuation element, the method comprising the following steps: determining whether the clutch is slipping beyond a given threshold; if so determining the current clutch torque; and, determining the current position of the actuation element based on the current clutch torque and the characteristic curve. Additional methods are specified that facilitate a referencing according to requirements.