Abstract: The invention relates to an urban driving operating method for an electronically controlled automatic transmission in which a driving speed characteristic (vf) is determined and it is possible to recognize an urban driving state when the driving speed characteristic (vf) is within a presettable value range with an upper limit and in which in addition a driving activity characteristic (FCOUNTER) is continuously determined. It is proposed according to the invention that the urban driving state be recognized when the driving activity characteristic (FCOUNTER) is also within a presettable value range with an upper limit and that a drive program optimized for the urban driving state be accessed.

Abstract: The invention is based on a control method having a characteristic curve (1) defined by interpolation points (3, 4, 5, 6, 7), the characteristic curve being stored in an electronic processing unit. To control stability and with sufficient accuracy processes overridden by strong, time-variant disturbances, it is proposed that a characteristic line (1) is preset and adapted according to a system deviation and a ratio of the difference between a measured point (9) and an adjacent interpolation point (4, 5) and the difference between the two interpolation points (4, 5) adjacent to the measured point (9).

Abstract: The invention relates to a method for determining a starting gear step for a vehicle with a stepped variable speed transmission with several gear steps. It is proposed that a maximum admissible value for a slip time (12) and/or a maximum admissible value for a frictional work (14) of the starting clutch during the starting process, the same as an available engine torque (10) for starting be determined, that beginning with a highest suitable gear step (18) for starting, values for the slip time (20) and/or the frictional work (22) be calculated in advance depending on the vehicle mass (8), that the precalculated values (20, 22) be compared with the maximum admissible values (12, 14), that the calculation loop be repeated with the next smaller suitable gear step for starting when at least one of the precalculated values is greater than the maximum admissible values and that a gear step be issued as starting gear step when the precalculated values are smaller than or equal to the maximum admissible values.

Abstract: Within the scope of the procedure for improvement of the shifting speed of automatic transmissions, at each gear shift at least one engaging or disengaging shifting element needed for the next gear shift in the same direction is prepared or lowered to shifting pressure during the gear shift in a manner such that when the synchronous rotational speed is reached, it is made possible immediately to carry out the next gear shift.

Abstract: A reversing transmission shiftable under load in which the reversing clutches (1, 2) are automatically evacuated by the flow of pressure medium through the clutch (1, 2) not subjected to pressure wherein bores (9, 24), which in this shifting state, are connected to the oil reservoir (5) are placed at the highest point of the piston chamber. The shifting clutches (1, 2) are configured as negative clutches. For modulating the pressure during a reverse shift, an accumulator (27, 28) is provided from which pressure medium flows out via orifices (25, 29). For inching a valve (30) is provided via which the closed clutch (1, 2) can be subjected to a pressure whose level can be continuously varied.

Abstract: The multi-speed boat transmission for propulsion systems having a basic transmission for transmitting the motor power to a fixed propeller or water jet has, in addition to a preferably single-speed basic transmission (2), a separate front-mounted transmission (1) for flange-mounting to the basic transmission (2) and stepping-up parts (7, 8, 12), the countershafts (5) being distributed around the periphery of the main shaft (10) of the basic transmission in a manner such that no additional forces act upon the main shaft (10).

Abstract: In a method for controlling an automatic transmission of a motor vehicle having an electronic gear control (EGS) that continuously exchanges signals with a vehicle dynamics regulator (FDR), the electronic gear control (EGS) receives signals (SL) of an anti-slip control system (ASC) and/or of an anti-blocking system (ABS). In addition the vehicle dynamics regulator (FDR) is functionally linked with a dynamic stabilizer (DS) which in predefined operating situations issues a signal (SV) to the electronic gear control (EGS) via the vehicle dynamics control (FDR), which signal is processed simultaneously with the incoming signals (SL) from the anti-slip control system (ASC) and/or the anti-blocking system (ABS).

Abstract: Multi-disk clutch connected downstream of a power split transmission consisting of a double clutch whose individual clutches rotate in opposite directions, the rotational-speed dependent axial forces being compensated on the shift piston, and has a valve which releases or blocks the flow of coolant to the disks and a return spring with an increasing spring characteristic line for calibrating the clutch.

Abstract: A method is proposed for the control and regulation of a drive system of a motor vehicle having one electronic transmission control for an automatic transmission and connected therewith an electronic engine control for a prime mover. In a coasting operation of the drive system, during a change over of a transmission element from an open to a closed or a slipping state during a coupling procedure of the transmission or a regulation procedure of the transmission element, rotatory masses of the engine are regulated and accelerated under control so that a vehicle deceleration is less than a presettable tolerance value.

Abstract: The invention relates to a method for controlling an automatic transmission wherein several shift programs are provided and allocated to specific values of a driving activity characteristic (FAKG) and in each shift program shifting characteristic lines and shifting rotational speeds are determined by accelerator pedal positions. The shifting rotational speeds are immediately increased to higher rotational speeds when the driver quickly depresses the accelerator pedal causing the accelerator pedal position gradient to exceed a presettable limit value. According to the invention, it is proposed that the shifting rotational speeds be determined according to the actual value of the driving activity characteristic by interpolation between shifting characteristic lines from two respective adjacent shift programs and the driving activity characteristic be immediately increased by a presettable offset amount when the accelerator pedal position gradient exceeds the presettable limit value.

Abstract: Parking lock which on the basis of an actuating signal triggered by the driver via an actuating device is engaged and disengaged by the fact that a piston (6) causes a detent disc (2) to rotate in such a way that, via a connection (19), a lock (17) is actuated which engages or disengages the parking lock. When engaged, the parking lock can be unlocked via a manual actuating device (13) causing an emergency release disc (3) to rotate by the fact that a bolt (4) likewise causes the detent disc (2) to rotate and then engages a detent unit (14) which maintains the parking lock in unlocked state. By repeated application of a hydraulic force to the actuating device (7) the detent unit (14) can be automatically disengaged by the detent disc (2) being caused to rotate.

Abstract: The invention relates to a method and device for a coupling (2) in a motor vehicle transmission, the coupling being controlled and regulated during two operational states by way of a first regulating circuit (3). The regulated quantity corresponds to the actual value of a differential engine speed of the coupling (2). The first state corresponds to a starting action and the second state to operation with a variable transmission ratio.

Abstract: According to the method for controlling at least one power-shift multi-speed boat transmission in conjunction with a fixed propeller or water jet, the upshift speed is a function of a value which indicates the intended acceleration, especially a function of the regulating speed of the control lever or the speed of modification of the transmission input speed.

Abstract: Parking brake, notably for automatic transmissions of motor vehicles, which is released via hydraulic pressure acting on a spring accumulator (3) and which is additionally held in the released state by a locking system (13) is actuated by a magnet (5) through which a current flows. The locking system (13) is kept activated and thus the parking brake released until the magnet (5) in the position in which the locking system (13) is actuated, has a power consumption lower than necessary for loading the locking system (13).

Abstract: An infinitely variable toroidal drive comprising a housing (1), an input shaft (3), a torque converter (34), two input discs (5, 15) with toroidal surfaces, two output discs (6, 16) with toroidal surfaces wherein one input disc and one output disc each form a pair and the two output discs are arranged next to each other with mirror symmetry, several friction wheels for transmitting a torque from the input disc to the corresponding output disc, an output shaft (10) and a gearwheel system (8, 9) between output discs and output shaft, there being removably fastened on the transmission housing (1) a holding frame (2) having: an upper portion (28), a lower portion (29), fastening devices (20, 30 and 46, 47) for fastening pivots (42, 43 and 48, 49) and a bearing support member (7) which connects the upper portion (28) with the lower portion (29) and in which is situated at least one bearing (24) for the gear wheel (8).

Abstract: A method and a device for actuating a motor vehicle clutch device (4). A control device (12) automatically influence the frictional power of the clutch device (4) in accordance with predetermined criteria (19) by varying the continuously variable ratio of a vehicle transmission (2).

Abstract: The invention relates to a bearing for a toothed wheel (24) of a toothed gear in the area between a first shaft (20) and a second shaft (46) which can rotate coaxially and at different rotational speeds in relation to each other to compensate for axial forces in the direction of the axis of rotation (12) of the shaft (20, 46). The toothed wheel (24) is mounted on a plate (26) provided between a first (28) and a second (30) axial bearing. A plate (10, 14) is provided between the first shaft (20) and the first axial bearing (28) and between the second axial bearing (30) and the second shaft (46), respectively, which contacts the relevant shaft (20, 46) on a line (16, 18) and effects conical deforming movements about the lines (16, 18).

Abstract: The invention relates to a method for controlling a high-temperature operating mode of an automatic transmission wherein at least one value of an actual engine (CMO) or transmission (CGT) temperature is continuously measured. In the electronic control unit several gear shift control programs are stored and are accessed at normal operating temperatures according to an evaluation counter provided with a driving activity characteristic. It is proposed that the evaluation counter be provided with a high-temperature operating value (MAX(UDCHMMO, UDCHMGT)) with which is associated a gear shift program which also has temperature-lowering properties when the actual temperature value (CMO, CGT) is higher than a first limit value (MOMIN, GTMIN).

Abstract: A method and device for a coupling (2) in a motor vehicle, transmission (1) are proposed in which the coupling is controlled and regulated during three operational states via a first regulating circuit (3). The regulated quantity corresponds to the actual value of a differential rotational speed of the coupling (2). The first state corresponds to a starting operation, the second state to the operation with constant ratio and the third state exists when a gear shift under load or a change of ratio from a first to a second ratio step of an automatic transmission (1) is initiated.

Abstract: The invention relates to a method for detecting cornering for a vehicle (2) with automatic transmission. According to the invention it is proposed that the current bend radius be determined from the rotational speed signals of the front wheels, that the beginning of a cornering mode be determined when the current bend radius falls below a first limit bend radius and the end of a cornering mode be determined when the vehicle has covered a presettable distance after exceeding a second limit bend radius.