Abstract: A hydraulic arrangement for controlling a twin-clutch transmission of a motor vehicle. The hydraulic arrangement has a hydraulic energy source for supplying the hydraulic arrangement with hydraulic energy with a hydraulic medium; a pressure accumulator for storing the hydraulic energy; and a clutch cooling device for cooling clutches of the twin-clutch transmission with the hydraulic medium. A transmission lubrication process and/or a transmission cooling process for cooling and/or lubricating a transmission of the twin-clutch transmission with the hydraulic medium is/are carried out, in addition to a prioritization process for prioritizing the supply of the pressure accumulator before the clutch cooling, and the clutch cooling before the transmission lubrication and/or transmission cooling by means of the hydraulic medium.

Abstract: A method for operating a continuously variable conical pulley transmission having two conical pulley sets that are operatively coupled by a endless torque-transmitting means, so that the transmission ratio between the conical pulley sets is continuously variable. A hydraulic medium is supplied to the continuously variable conical pulley transmission in a stop phase of a start/stop operation by means of a pump unit that includes a pump that is driven by an electric motor. The electric motor is controlled as a function of the temperature of the hydraulic medium.

Abstract: A dual clutch transmission which has a first clutch, actuated by a first hydraulic cylinder, a second clutch, actuated by a second hydraulic cylinder, shift devices for shifting gears, which are actuated by respective hydraulically operated cylinders, a hydraulic energy source for supplying the hydraulic cylinders and the hydraulically operated cylinders with hydraulic energy and a third clutch that is actuated by a third hydraulic cylinder.

Abstract: A double clutch gearbox which has a first volume flow valve for actuating a first clutch, which is arranged downstream, a second volume flow valve for actuating a second clutch which is arranged downstream, and a first hydraulic power source for supplying the volume flow valves and the clutches with a system pressure. In order to provide an improved double clutch gearbox, the clutches have a fluid cooling means which is arranged downstream of the first volume flow valve.

Abstract: A dual clutch transmission which has a first clutch, actuated by a first hydraulic cylinder, a second clutch, actuated by a second hydraulic cylinder, shift devices for shifting gears, which are actuated by respective hydraulically operated cylinders, and a hydraulic energy source for supplying the hydraulic cylinders and the hydraulically operated cylinders with hydraulic energy. The hydraulic energy source has a first pump, a second pump and an electric drive driving the second pump.

Abstract: A hydraulic supply system for a hydraulically-operated automatic transmission includes a primary pump that is driven by an internal combustion engine of a vehicle. An electrically-driven auxiliary pump is provided to supply the system with hydraulic pressure when the primary pump is off or to supplement the primary pump when the primary pump does not deliver sufficient pressure. A discharge line from the auxiliary pump is connected to a control line of the hydraulic supply system and to the hydraulic system supply line under system pressure. Check valves are provided in the respective lines from the auxiliary pump. An additional check valve is provided in a line that extends from the control line to a torque sensing chamber of the automatic transmission.

Abstract: A compressor drive system for driving a compressor of an internal combustion engine contains a variable speed drive unit and a planetary gear set, the planetary gear set being connected to the internal combustion engine and the compressor in such a way that a first output shaft of the planetary gear set is connected to the compressor, a first drive shaft of the planetary gear set is connected to the internal combustion engine, and a second drive shaft of the planetary gear set is connected to the internal combustion engine through the variable speed drive unit.

Abstract: A hydraulic supply system for a motor vehicle includes an internal combustion engine, a pump driven by the internal combustion engine, and a hydraulically operated component that is driven by hydraulic fluid transported by the pump. An electric motor is provided to drive the pump when the internal combustion engine is not running.

Abstract: Apparatus for the active stabilization of the rolling of a vehicle that has at least two axles that each have at least two wheels. The axles are each equipped with a transverse stabilizer that is hydraulically actuated by a directional control valve. The transverse stabilizers are operated by respective hydraulic motors. A pressure supply pump applies different hydraulic pressure levels through respective pressure limiting valves. The directional control valve is actuated hydraulically by a directly controlled control valve.

Abstract: The invention relates to a rotary transmission leadthrough for passing a medium through between a fixed part and a rotary part rotable relative to the fixed part, wherein a stop device, in particular a stop disc, is arranged between the fixed part and the rotary part. The invention is distinguished by the fact that the stop device, in particular the stop disc, is prestressed against the rotary part in the axial direction.

Abstract: A pressure medium supply unit for a hydraulic system of a motor vehicle that includes a clutch requiring a high hydraulic pressure and a low volumetric flow rate of hydraulic fluid for operation, and an automatic transmission requiring a low hydraulic pressure and a high volumetric flow rate of hydraulic fluid for operation. A single hydraulic pump is provided to supply hydraulic fluid to both the clutch and the transmission.

Abstract: The invention relates to a valve block, in particular a hydraulic valve block, which comprises a basic body having a base area and a plurality of blind holes, in particular valve bores, and lamellae, having a plurality of valve actuating devices, in particular electromagnets, and having a plurality of connections, in particular hydraulic connections. The invention is distinguished by the fact that the basic body has an encircling sealing surface, running obliquely relative to the base area, for a protective hood, in particular an oil pan.

Abstract: A method for mounting a valve having a valve housing within which a valve spool is slidably received such that it can move to and fro. The position of the valve spool is detected by a sensor, in particular a Hall sensor, which interacts with at least one permanent magnet element or at least one magnetic flux element that is attached to the valve spool. Before the valve is put into operation, the valve spool is moved into at least one valve spool position that includes tolerances, and the spool position is detected and is accurately stored in a programmable sensor, and/or is programmed into the sensor.

Abstract: A mounting arrangement for a pedal force servomechanism assembly of a motor vehicle structure. The pedal force servomechanism assembly is provided with integrated screw connection points and can be fastened by screws to any vehicle structure in a particular vehicle application. It also provides that a static axial pressing of the components located within the unit, a hydraulic unit and a motor unit, is ensured. A holding plate is positioned between the opposed surfaces of those assembled units, and is provided both with through-holes for attaching the hydraulic unit to the motor unit, as well as with through-holes for attaching the assembly to the vehicle structure of the particular vehicle application. The holding plate is of resilient design in the axial direction in the clamping region between the hydraulic unit and the motor unit.

Abstract: An adjusting device including a CVT planetary roller transmission having two axially-spaced sun wheels that are rotatable about a common axis of rotation and at different speeds of rotation. Planet wheels contact and ride against peripheral surfaces of each of the sun wheels, and an axially displaceable ring wheel lies radially outwardly of the sun wheels and engages a peripheral groove formed in the sun wheels. When the ring wheel is axially displaced relative to the sun wheels the axes of rotation of the planet wheels tilt relative to the sun wheel axis resulting in a difference in the rotational speed of the sun wheels changes. The device can be employed as an adjusting device for adjusting the rotational speed of connected units, and also as a drive line component having a variable transmission ratio and situated in a power train of a motor vehicle.

Abstract: A hydraulic pressure reservoir having at least one pressure chamber formed between two opposed, movable inner boundary members. Each inner boundary members includes a spring cover and a diaphragm spring. An outer boundary member peripherally surrounds the movable inner boundary members and has a U-shaped cross section along at least a part of its periphery to axially support the diaphragm springs in a fixed axial position. The outer boundary member can be formed in several pieces that are held together by interconnections or by a surrounding outer tensioning member.

Abstract: A hydraulic system for controlling a double-clutch transmission operating with wet clutches. A pump provides a system pressure in a supply line, and a control valve for applying to individual clutch actuators an actuation pressure that is derived from the system pressure and that is modulated in accordance with the operating conditions. A charging valve directs hydraulic fluid delivered by the pump into a return line when the system pressure is reached, wherein the hydraulic fluid flowing through the return line can be fed to the clutches to cool them.

Abstract: A hydraulic system comprising a pump for feeding hydraulic fluid from an inlet side to an outlet side, wherein a pressure accumulator is disposed at the outlet side, wherein between the pump and the pressure accumulator a hydraulic control valve is disposed, which has at least two valve positions, wherein the outlet side of the pump is connected to the pressure accumulator in a first valve position, and separated from the pressure accumulator in a second valve position, wherein the outlet side of the pump is connected to the inlet side through the control valve in the second valve position.

Abstract: A belt-driven conical-pulley transmission contained in the power train of a motor vehicle and having two conical disk pairs encircled by an endless torque-transmitting element. A hydraulic system is provided for pressing the conical surfaces of the conical disks against the endless torque-transmitting means and for opposite adjustment of the spacing between the conical disks for an adjustment of the transmission ratio. The hydraulic system includes a pump driven by an internal combustion engine that propels the vehicle, and the system includes an auxiliary oil source with which a predetermined minimum pressure is maintained in the hydraulic system when the internal combustion engine is shut off.

Abstract: The invention relates to a method and a device in the form of a hydraulic unit for triggering at least one clutch (5, 6) in a hydraulic circuit for an axle transmission of a vehicle. Said method and device make it possible to simply and very quickly make available an adequate amount of working fluid at the required pressure to at least one clutch according to the driving situation in order to close said clutch.