Abstract: A hydraulic controlling system including: a cooling and lubricating oil line and a main controlling oil line; an oil-liquid storage; a first pump, wherein an inlet of the first pump is connected to the oil-liquid storage and an outlet of the first pump is connected to the main controlling oil line; a second pump, wherein an inlet of the second pump is connected to the oil-liquid storage and an outlet of the second pump selectively communicates with the cooling and lubricating oil line or the main controlling oil line; and a gearbox-gear-shifting oil line including a gear-shifting-pressure regulating valve, a plurality of gear-shifting-flow-rate controlling valves and a plurality of gear-shifting selector valves. The gear-shifting-flow-rate controlling valves are connected to the main controlling oil line via the gear-shifting-pressure regulating valve. At least some of the gear-shifting-flow-rate controlling valves are connected to a gear-shifting executing piston via the gear-shifting selector valves.

Abstract: A hydraulic controlling system including: a cooling and lubricating oil line and a main controlling oil line; an oil-liquid storage; a first pump, wherein an inlet of the first pump is connected to the oil-liquid storage and an outlet of the first pump is connected to the main controlling oil line; a second pump, wherein an inlet of the second pump is connected to the oil-liquid storage and an outlet of the second pump selectively communicates with the cooling and lubricating oil line or the main controlling oil line; and a gearbox-gear-shifting oil line including a gear-shifting-pressure regulating valve, a plurality of gear-shifting-flow-rate controlling valves and a plurality of gear-shifting selector valves. The gear-shifting-flow-rate controlling valves are connected to the main controlling oil line via the gear-shifting-pressure regulating valve. At least some of the gear-shifting-flow-rate controlling valves are connected to a gear-shifting executing piston via the gear-shifting selector valves.

Abstract: An actuator arrangement for a motor vehicle drivetrain, in particular for a dual-clutch arrangement. A first fluid cylinder is connected via a first fluid connection to a fluid supply device. A second fluid cylinder is connected via a second fluid connection to the fluid supply device. A pressure measuring arrangement has a single pressure sensor which is connected by means of a connecting arrangement to the first fluid connection and to the second fluid connection.

Abstract: Shift arrangement for a motor vehicle gearbox. The shift arrangement has a shift element which can be connected or is connected to a shift member. The shift arrangement has a hydraulic actuator by means of which the shift element can be moved in a first shifting direction and in an opposing second shifting direction. The hydraulic actuator comprises a double-acting hydraulic cylinder which has a first cylinder port and a second cylinder port. The shift arrangement has a hydraulic circuit which has a pump and is connected to the first and second cylinder ports. The pump is connected to an electric motor as a pump drive and is embodied as a bidirectional rotational pump which has a first pump port which is directly connected to the first cylinder port, and which has a second pump port which is directly connected to the second cylinder port. The shift element can be moved by changing the rotational speed and/or the direction of rotation of the electric motor.

Abstract: A method for correcting an actuator characteristic of a clutch actuator for a friction clutch of a vehicle transmission after the commissioning of the vehicle. The actuator characteristic relates a first desired variable, such as a desired clutch pressure, to a second desired variable, such as an desired actuator current. The method includes approaching a quasi-steady-state operating point of the friction clutch. In addition, a deviation is detected between the first desired variable and an actual variable of the friction clutch. Also, a correction function is set up for the actuator characteristic according to the deviation.

Abstract: An actuator arrangement for a motor vehicle drivetrain, in particular for a dual-clutch arrangement. A first fluid cylinder is connected via a first fluid connection to a fluid supply device. A second fluid cylinder is connected via a second fluid connection to the fluid supply device. A pressure measuring arrangement has a single pressure sensor which is connected by means of a connecting arrangement to the first fluid connection and to the second fluid connection.

Abstract: A method for activating a clutch of a vehicle drive train. A controller of an electronic control unit generates an electrical desired-value signal corresponding to a desired pressure with which the clutch is to be acted upon. The control unit receives from a sensor an electrical actual-value signal which is to correspond to an actual pressure with which the clutch is acted upon. The sensor measures the pressure at a measurement location which is connected via a transfer link to an action location at which the clutch is acted upon with a clutch pressure. The actual-value signal passes through a transfer element having a delay property before it is delivered to the controller.

Abstract: A method for correcting an actuator characteristic of a clutch actuator for a friction clutch of a vehicle transmission after the commissioning thereof. The actuator characteristic relates a first desired variable, such as a desired clutch pressure, to a second desired variable, such as an desired actuator current. The method comprises the steps: approaching a quasi-steady-state operating point of the friction clutch; detecting a deviation between the first desired variable and an actual variable of the friction clutch; and setting up a correction function for the actuator characteristic according to the deviation.

Abstract: A method for activating a clutch of a vehicle drive train. A controller of an electronic control unit generates an electrical desired-value signal corresponding to a desired pressure with which the clutch is to be acted upon. The control unit receives from a sensor an electrical actual-value signal which is to correspond to an actual pressure with which the clutch is acted upon. The sensor measures the pressure at a measurement location which is connected via a transfer link to an action location at which the clutch is acted upon with a clutch pressure. The actual-value signal passes through a transfer element having a delay property before it is delivered to the controller.

Abstract: A fuel injector, in particular a high pressure injector for direct injection of fuel into a combustion chamber of an internal combustion engine having externally supplied ignition and mixture compression, is characterized in that a valve needle, which is movable axially along a longitudinal axis of the valve, has a specially designed valve closing section on its downstream end. To open and close the valve, the valve closing section works together with a fixed valve seat. Swirl-producing elements are arranged upstream from the valve seat while a flattened face running perpendicular to the longitudinal axis of the valve is provided on the downstream end of the valve closing section downstream from the valve seat.

Abstract: The invention relates to an electrohydraulic brake system in which, in a normal operating mode, a pedal cylinder (1) which is coupled to a brake pedal (16) can be acted on either by a high-pressure reservoir (12) or a low-pressure reservoir (13) via an electrovalve (4). Likewise, a brake cylinder (2) which is coupled to a brake device (17) can be coupled either to the high-pressure reservoir (12) or the low-pressure reservoir (13) via an electrovalve (7). If there is a fault, by switching over electrovalves (3, 5, 6), the system is changed over into a safety mode in which the pedal cylinder (1) and the brake cylinder (2) are coupled directly hydraulically. In order to ensure a defined volume of hydraulic fluid in the hydraulic path (13) here, an additional cylinder (8) is provided whose spring-loaded side which expands in the safety mode can carry off excess hydraulic fluid from the brake cylinder (2). In addition, hydraulic fluid can be removed from the low-pressure reservoir (13) via a nonreturn valve (11).

Abstract: A device for simulating the force/position behavior of a motor vehicle pedal. In this case, the pedal position is adjusted by an electrohydraulic servo unit which is part of a control circuit. The guiding variable of the control circuit is the desired position of the pedal which is calculated from the pedal force using suitable algorithms. A force transducer is used to determine the pedal force, and interfering dynamic forces are eliminated by additionally taking the pedal acceleration into account.

Abstract: A swirl disk is composed of at least one metallic material, and is configured as having at least one intake area and at least one outlet orifice, the at least one outlet orifice being introduced in a lower base layer, and having at least two swirl channels emptying into a swirl chamber, the swirl chamber being provided in a central swirl-producing layer. An upper layer is configured as a cover layer, which over its entire cross-sectional surface represents a closed layer without orifice contours. All the layers of the swirl disk are directly built up on top of each other using electroplating metal deposition (multilayer electroplating). The swirl disk is suitable for a use in a fuel injection valve, in particular in a high-pressure injection valve for directly injecting the fuel into a combustion chamber of a mixture-compressing, external-ignition internal combustion engine.

Abstract: A fuel injector, in particular a high-pressure injector for directly injecting fuel into a combustion chamber of a mixture-compression, spark-ignition internal combustion engine, which is characterized in that on a valve seat element a conical section is formed having a valve seat surface, to which an outlet opening is immediately connected on the downstream side. The outlet opening has an intake plane, an outlet plane, and a central axis, the central point of the intake plane being offset with respect to the valve longitudinal axis and the central axis running diagonally with respect to the valve longitudinal axis. Upstream of the valve seat element a disk-shaped swirl element is arranged, which can be used both for generating a right swirl as well as a left swirl.

Abstract: A blade ring for a gas turbine engine, especially an aircraft engine, may be a rotor ring or disk or a stator ring. At least one blade (9) forming an airfoil (2) is secured to at least one carrier ring (1, 10). The blade (9) is fixed to the carrier ring or disk or shroud (1, 10), either through a platform (4) forming a foot portion of the blade or through a neighboring transitional section (12) forming part of the carrier ring or disk or shroud. The mechanical stress and the overall axial length of the blade ring are reduced by a transition fillet (6) between the surfaces (3) of the airfoil (2) and the platform (4) or the peripheral section (12). The transition fillet (6) has a curve (7) that narrows toward the platform (4) or peripheral section (12) with radii (R1, R2, R3) that have different centers and are largest close to the blade surface (3, 8) and smallest close to the ring surface. This fillet construction extends all around the blade and relative to an inner ring or disk and/or an outer ring.

Abstract: An electromagnetically actuable valve, in particular an injection valve for fuel injection systems of internal combustion engines is provided. The actuable valve has a throttling point that joins a core and a connector part to one another. An annular insert that supports the throttling point in a radial direction is provided. The use of the annular insert makes it possible to utilize the advantages of the design of a valve tube with the throttling point, and at the same time creates the stability necessary for high-pressure valves. The annular insert is made from electrically nonconductive material or configured with an interruption at at least one point and mounted in an electrically insulated fashion. This prevents eddy currents, which have a negative effect on switching times, in the annular insert. The annular insert is located at least partially within an influence region of a magnetic field of a magnet coil, in the presence of a changing magnetic field.

Abstract: A thermal insulating sleeve for a fuel injection valve, which can be inserted in a mounting hole of a cylinder head of an internal combustion engine, has a sleeve body which at least partially envelops a nozzle body of the fuel injection valve. At the injection end of the sleeve body there is a folded-back section, in which the sleeve body has a two-layered configuration, and there is a conical section, which tapers in the direction toward the injection end and which in the assembled state fits tightly against the tapered section of the nozzle body.