Abstract: In a plate valve, particularly a cone spray valve, the valve gap, or respectively, seal gap (6) which is present in the open condition is not designed with parallel faces, but with cross-sectional areas which remain the same given increasing radius. This approach applies to a set from the interior outward. The advantage consists in the avoidance of cavitation and in the achievement of a low closing force for sealing the valve.

Abstract: The compensation element is compensating for temperature-conditioned length changes of an object. An injection valve that is fully functional in the entire range of the operating temperatures of a motor requires a device that compensates thermally conditioned length changes of the mechanical components (piezo-electric actuator, valve lifter, housing, etc.). This device should be capable of absorbing great forces and allow a stiff bearing of the actuator. The compensation element (3) has an oil-filled chamber (21) is composed of an actuator-side upper part (18), of a lower part (19) supported on a stiff bearing (valve housing 17), and of a structure (annular seal element 20) sealing the chamber (21) and yielding in an axial direction.

Abstract: A device and method for dosing fluid has a housing enclosing a lifting element and a primary drive hydraulically operable on the lifting element via a hydraulic chamber. The lifting element is disposed within a borehole with a leakage permitting fit. A fluid chamber in communication with the borehole contains a fluid to be dispensed in a dosed manner by controlled axial movement of the primary drive and lifting element.

Abstract: A wall-controllable primary drive, for example a piezo actuator, guided in a first bore transfers its stroke motion-commutated onto a secondary-side lifter element guided in a second bore, transmitting said stroke by a piston-hydraulic stroke transmission on the basis of a hydraulic chamber. The pressure in a valve chamber is controlled via secondary-side lifter element.

Abstract: An electrohydraulic drive is provided. High-speed injection valves of hydraulic lift transformers have, for example, a pressure piston driven by a piezoelectric actuator and a reciprocating piston mounted in an axially displaceable fashion in a pressure piston bore and connected to the valve needle. The electrohydraulic drive has a piezoelectric actuator and a hydraulic force/travel transmission of compact design. To ensure the required axial symmetry of the drive despite production-induced tolerances, a balance element supported in a frustoconical depression of the pressure piston is arranged between the piezoelectric actuator and the lift transformer. During assembly of the hydraulics, the element having the form of a spherical segment and produced from high-grade steel can slide freely on the piezoceramic and thus compensate a nonconcentric alignment of the actuator and pressure piston.

Abstract: An easily controllable primary drive (5) guided in a first bore (3), for example a piezo actuator, transmits its stroke by a piston-hydraulic stroke transmission with a hydraulic chamber (2) onto a stroke element (70) of the secondary side guided in a second bore (4). The pressure in a valve chamber (9) is controlled via the stroke element (7) of the secondary side.

Abstract: A electrohydraulic stop device contains a piezoelectric actuator (P) which acts on two coupled hydraulic stroke transformers having identical transmission ratios. Essential components of the stop device are the pressure piston (DK) driven by the actuator (P), the lifting piston (HK) mounted axially displaceably in a cylindrical bore (ZY) of the pressure piston (DK), and a chamber (KB), into which open inflow and outflow ducts (B2, G2, B3, G3) for the medium to be shut off. By activating the actuator (P), the dumbbell-shaped lifting piston (HK) can be displaced virtually without delay in the pressure piston bore (ZY) and the inflow or outflow ducts (B2, B3) be closed.

Abstract: Drive elements whose physical volume is considerably smaller than piezoelectric actuators for comparable mechanical characteristics and actuation travels can be developed on the basis of the magnetostrictive material Tb.sub.x Dy.sub.1-x Fe.sub.2 (Terfenol). Despite these characteristics, magnetostrictive actuators have until now been used only where no rapid switching processes or actuation movements are required. An actuator of compact construction responds to an electrical drive signal very quickly and can produce large actuation forces. The actuator typically contains N.apprxeq.100 drive elements (1, 1') which are arranged one above the other in the form of a stack, are each of layered construction, and are provided with electrical connections. The drive elements (1, 1') each have a small metal plate (4, 4'), which is arranged between two insulators (2, 2', 3, 3'), and an actuator element (5, 5') which is manufactured from Terfenol.

Abstract: In order to avoid measurement signal drift, a gas sensor has a gas sensitive layer which is provided on its upper side with a measuring electrode structure and on its lower side with an electrically conductive layer.

Abstract: A device is provided which allows exact apportioning and controllable atomization of fuel as necessary for various operating conditions of an internal combustion engine. The apportioning ensues with an apportioning aperture that can be closed via a valve needle. Separately therefrom, the atomization ensues with a piezoelectrically driven nozzle having an atomizer orifice placed into vibration. The shape of the atomizer aperture can be round, triangular, quadrangular or cross-like.

Abstract: A substantially uniform and nevertheless low feed line resistance of the conductor paths (L.sub.i) can be realized for all heating elements in an ink jet printer by a suitable dimensioning of a transition structure (UV) of a conductor path layout disposed on a thin-film substrate. This transition structure connects the conductor paths of close spacing (LA) in the region of the heating elements (RH) to the conductor paths of wide spacing (LB) in the region of the bonding contacts to each other. For this purpose a dimensioning requirement is required, which in case of predetermined input values, i.e. the conductor path widths (d.sub.a, d.sub.b) and the separation distance widths (s.sub.a, s.sub.b) furnishes in the two regions and in the separation distance width (s.sub.v) of the transition structure (UV) as starting value the conductor width (d.sub.v) in the transition structure (UV).

Abstract: A heating device of a write head based on layer technology for an ink jet printer is furnished as a heating resistor (15) in the form of a heating conduit meander directly from an electrically conductive thin film, disposed in the empty spaces on a substrate, and deposited on the base oxide for furnishing the thermal converter and the conductor paths (5, 6). The empty spaces are thereby created by a spacing and a group-like combination and a gathering of the conductor paths (5, 6), wherein part sections of the heating resistors (15) are embedded in the empty spaces. The heating resistor (15) is part of a resistance measurement bridge and is employed simultaneously as a heat source and as a temperature sensor based on processing and evaluation of its electrical resistance values at different points in time.