Abstract: A self-pumping hydropneumatic vibration damper with internal level control, especially for motor vehicles, has an oil-filled working cylinder under the pressure of at least one gas cushion. The working cylinder is divided into two working spaces by a working piston mounted on a piston rod. A piston pump, which is driven by the sprung movements of the vehicle and thus conveys damping oil from a low-pressure chamber into the working space connected to the high-pressure chamber. The pump cylinder of this piston pump is formed by the hollow piston rod, which connects the working space connected to the high-pressure chamber to the low-pressure chamber. An axially movable stepped pump piston is provided in the pump cylinder.

Abstract: A multiple stage transmission in planetary design comprises three planetary gear sets (P1, P2, P3), at least six rotatable shafts (1, 2, 3, 4, 5, 6), at least six shifting elements (03, 04, 13, 16, 45, 56), the drive shaft (1) is permanently connected with the spider of the first planetary gear set (P1) and, via one clutch (16), with the shaft (6) which is connected with the sun gears of the second planetary gear sets (P2) and connectable, via the clutch (56), with the, the driven shaft (2) being connected with the spider of the third planetary gear set (P3), the shaft (3) is permanently connected with the sun gear of the third planetary gear set (P3) and the ring gear of the second planetary gear set (P), via one clutch (13) connectable with the drive shaft (1) and, via one brake (03), attachable to the housing (G) and the sun gear of the first planetary gear set (P1) being non-rotatably connected via one shaft (0) with the housing (G).

Abstract: A planetary transmission with a planetary gearset (RS1), having a satellite carrier with planetary gearwheels (11, 14), mounted bolts (12, 15) attached to the satellite carrier. The satellite carrier comprises a web plate (17) via which lubricant is fed to the planetary gearwheels (11, 14) through lubricant bores in the bolts (12, 15) of the planetary gearwheels (11, 14). A structural element adjacent to the web plate (17) has no rotation speed relative to the web plate (17). A static-seal element (18) is arranged between the web plate (17) and the structural element adjacent to the web plate (17) above the bolts (12, 15) so that a lubricant chamber (109) is formed between the web plate (17) and the structural element adjacent to the web plate (17). Lubricant flows into this chamber (109), accumulates therein, and passes from the chamber (109) into the lubricant bores of the bolts (12, 15) of the planetary gearwheels (11, 14).

Abstract: A dual clutch gearbox for a motor vehicle comprising a first gearbox input shaft (20) with which at least one first gear is associated, and a second gearbox input shaft (22) with which at least one second gear is associated. An outer gearbox input shaft (22) embodied as a hollow shaft surrounds an inner gearbox input shaft (20), and a synchronization device is provided inside the gearbox.

Abstract: Damping valve device having a damping valve body with at least one flow channel, which is closed at least partially by a first spring-loaded valve disk on a first valve seating surface, and a second spring-loaded valve disk, which rises from its valve seat at a higher opening pressure than the first valve disk. One of the cover sides of the first spring-loaded valve disk is held under tension on the first valve seating surface while the other cover side is held under tension on a second valve seating surface, and one of the valve seating surfaces of the first valve disk executes a lifting movement synchronously with the second spring-loaded valve disk.

Abstract: A bridging clutch for a clutch apparatus which has a hydrodynamic circuit in a clutch housing. The bridging clutch may have a piston which is arranged on a hub and which is connected to a piston mount, which is mounted on the clutch housing, such that it can be moved axially via axial force stores. The piston mount has cutouts between radial extensions in the circumferential direction for projections which are provided on the piston and which pass through the piston mount. Axial force stores engage behind the piston mount on its side facing away from the piston and are attached to the piston at one connecting end and have lever ends which act on contact surfaces of the piston mount with predetermined prestressing in the direction of the piston.

Abstract: A limit stop with an elastomer resilient element, which is to be secured on a door or lid and/or on an opposing stationary vehicle section for damping forces generated when the door or lid strikes stationary chassis parts of a motor vehicle. The limit stop includes an additional damping section disposed adjacent to and cooperating with the elastic resilient element in a spring deflection direction of the resilient element. The damping section comprises at least two chambers filled with a fluid and a nozzle plate arranged between the chambers with at least one channel extending through the nozzle plate and connecting the chambers. The fluid is displaced from one of the chambers into the other chamber during a spring deflection of the elastomer resilient element, thereby producing a pressure force which is caused by the buildup in pressure when the volume of one of the chambers decreases and augments the return force of the resilient element.

Abstract: In the method for kick-down switching speed optimization in a motor vehicle with an automatic transmission, the kick-down upshift point is determined as a function of the load conditions and the road inclination in each case.

Abstract: A first acceleration sensor is arranged on a vehicle body for detecting an acceleration signal of the vehicle body and a second acceleration sensor is arranged on a wheel-side axle part for detecting an acceleration signal of the wheel-side axle part, the vehicle body and the wheel-side axle part execute relative movement with respect to each other. The wheel acceleration signal and the body acceleration signal are each integrated twice to form respective distance signals. The difference between the two distance signals at a first time (t0) is determined and stored as a gap value. A second distance signal difference is determined at a second time (t1) for a new gap value.

Abstract: In a device for communication on a communication path between control elements (18, 20, 22, 24) which are actuated by a driver of a vehicle and emit control signals and devices (4, 8) of the vehicle which receive control signals and convert the control signals into reactions in or on the devices, the control signals are transmitted from the control elements (18, 20, 22, 24) and to the devices (4, 8) in wireless manner at least on sections of the communication path.

Abstract: A gear shift device (2) for a motor vehicle comprises one cylinder (4) loaded with a pressure medium. Situated in said gear shift cylinder (4) is one gear shift piston (12) which divides the gear shift cylinder (4) into two working chambers (22, 24) and has one aperture (30) adequate to allow an exchange of pressure medium between the two working chamber (22, 24). In the gear shift cylinder (4) is provide one axially fixed bolt (26) which protrudes through at least one aperture (30) in the gear shift piston (12). The bolt (26) has a diameter which is not constant over the length of the bolt (26) and interacts with at least one aperture (30) in the gear shift piston (12) to form sealing points.

Abstract: A drive system for a mobile vehicle has hydraulic motors (1, 2) arranged in a transmission housing (3), which drive a drive output shaft (22) via a totalizing transmission gearset, the totalizing transmission and the hydraulic motors (1, 2) being arranged within the transmission housing (3).

Abstract: This invention concerns a device (1) for the determination of air content, the air separation behavior and the surface foam formation of oils, in particular of transmission oils with an air-oil mixer (2) and a differential pressures sensor (3). A conveyor system (4) transports the oil through pipe lines (5) of the air-oil mixer (2). A compressed air port (6) is provided, which transports air into the pipe lines (5), of the air-oil mixer (2). A Venturi pipe (9) is installed in one of the pipe lines (5), and the differential pressure sensor (3) records, through at least two separate drill tubes (7, 8) in the conveyor system of the oil at the Venturi pipe (9), differential pressures in the oil.

Abstract: The invention relates to a method for controlling a pressure supply device in a hydraulic circuit, especially in a hydraulic circuit in an automatic gearbox which comprises an hydraulic pump, a pressure control valve and a consumer. The hydraulic pump is controlled if the system pressure falls below a specific lower threshold value and is switched off if a specific higher threshold value of the system pressure is reached or exceeded. In the data on the system pressure is not available, the current system pressure is calculated.

Abstract: A control of a drive train for a wheel loader having one pressure-medium actuated brake and one transmission operated via a torque converter and at least one forward and/or reverse gear respectively actuated via a power shift clutch and one power take off wherein, when a predetermined value of the power delivered by the transmission to the power take off is exceeded, the pressure of the engaged power shift clutch for the forward or reverse gear is reduced to a residual level.

Abstract: A vehicle gearbox having an input shaft, an output shaft and a countershaft, which is arranged to parallel to the axis of shafts and can be drivingly connected by gear sets to shafts via separating clutches, wherein four gear sets and a reversing gear set having an idler and a fixed gear form a main gearbox group and two gear sets having an idler and a fixed gear form a downstream area gearbox. The separating clutches and the idlers of the main gearbox group are arranged on the input shaft while the idlers of the area gearbox group rest on the countershaft, wherein the gearbox diagram, the switchgear and the gearbox housing for a vehicle gearbox with six forward gears are the same as those for a vehicle gearbox with eight forward gears.

Abstract: In a drive train for a working machine, in particular, a wheel loader, the driving speed is preselected via a driving pedal (11) and the working hydraulic system is actuated via a selector lever (8), whose signals are fed to an electronic control unit (10) which regulates a drive engine (1) and a clutch (2) arranged between the drive engine (1) and a pump impeller (3) of a hydrodynamic torque converter in such a manner that an auxiliary drive (6) for a pump (7) of the working hydraulic system is operated at a sufficient speed, while the preselected driving speed is not exceeded.

Abstract: A method for modifying a defined adaptive driving strategy, which is stored in the control system for an automatic transmission of a motor vehicle, for adaptation to another type of driver with a different driving style, consists in that the parameters used for the driving strategy are modified by the other driver, the data for this being input to the transmission electronics via an input unit and an interface with the electronics.

Abstract: A transmission (1) for distributing a drive torque to at least two output shafts (7, 8) which has at least two planetary gear sets (2, 3) with at least three shafts wherein each shaft (4, 5) of a planetary gear set (2, 3) is connected with one input shaft (6). Besides, each shaft of a planetary gear set (2, 3) constitutes one of the output shafts (7, 8) and at least one other shaft (9 or 10) of a planetary gear set (2 or 3) is operatively connected with one shaft (10 or 9) of one other planetary gear set (3 or 2). A torque of a shaft (9 or 10) dependent on operating state can be supported according to an operating state of the respective other shaft (10 or 9) via an operative connection (11) therewith in a manner such that when a rotational speed difference occurs between the output shafts (7, 8) a torque that changes the rotational speed difference abuts via the operative connection (11) on the planetary gear sets (2, 3).

Abstract: To be able to determine the torque of a turbine rotor (7) with precision even when a clutch (3) is operated with slippage, a rotation speed sensor (13) determines the speed of a pump impeller wheel (2) and a rotation speed sensor determines the speed of the turbine rotor (7), and the speed signals are transmitted to an electronic control unit which, with reference to stored torque converter data, determines the torque of the turbine rotor.