Abstract: A jet opening 13a for injecting fuel can be opened and closed by a ball valve 23 of a movable element 20. An orifice plate 14 is disposed on a downstream side of the jet opening and has between about eight to eighteen circular jet holes formed for further atomizing fuel particles exhausted by the jet opening 13a. Upstream side openings of the jet holes can be dispersed on a plurality of circles. A thickness t of the orifice plate and a diameter &phgr;d of the jet holes can be set to be 0.53≦t/&phgr;d≦0.82. A shortest distance L between said upstream side openings of the jet holes and a diameter &phgr;d of the jet holes can be set to be L>&phgr;d.

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 by the fact that at a valve seat element a conical section is formed having a valve seat surface, to which an outlet opening is immediately joined in the downstream direction. The outlet opening has an intake plane, whose central point lies on the valve longitudinal axis, whose central axis, however, runs diagonally with respect to valve longitudinal axis. A disk-shaped swirl element is arranged upstream of the valve seat element. The swirl element has swirl channels, which are distributed over the periphery, the swirl channels having varying geometries or dimensions.

Abstract: An injector for common rail Diesel injection systems of motor vehicles, having a multilayer piezoelectric actuator which has a multilayer actuator body. The actuator body is prestressed on a face end by a prestressing device and is seated inside a center longitudinal bore of an injector housing. The injector is characterized in that the prestressing device have at least one cup spring, which in a prestressing movement engages the face end of the actuator body opposite an injector valve (V), as well as a force transmission member seated in the injector housing and axially movable therein, the transmission member transmits the spring force of the at least one cup spring to the face end, toward the valve, of the actuator body.

Abstract: A fuel injector is provided which is designed to suppress unwanted vibrations of a nozzle needle-actuating piston, thereby avoiding the injection of an excess quantity of fuel. The fuel injector comprises an actuator and a displacement amplifying chamber filled with fluid to which a large-diameter piston and a small-diameter piston working as the nozzle needle-actuating piston are exposed. The displacement amplifying chamber works to amplify and transmit displacement of the large-diameter piston by the actuator to the small-diameter piston. The fuel injector also includes a stopper which restricts movement of the small-diameter piston toward the displacement amplifying chamber to a given range, thereby suppressing the unwanted vibrations of the small-diameter piston.

Abstract: A valve seat/director unit the combines the functions of an injector valve seat and a separate spray director plate into an integral unit combining both functions. The unit is a generally flat plate having an outer portion with at least one sealing rib. A central portion includes at least one endless rib forming a valve seat and surrounding a spray director including a recessed area communicating with at least one fuel spray opening. Upper surfaces of the sealing rib(s) and valve seat are preferably flat and coplanar with one another for engagement by cooperating surfaces of an injector member and a valve member, respectively.

Abstract: A fuel injector comprises a tube assembly, a seat secured at an end of the tube assembly, a stem assembly movable with respect to the seat, a first set of piezoelectric elements connected to the stem assembly, and a second set of piezoelectric elements connected to the first set of piezoelectric elements. The tube assembly has a longitudinal axis extending between a first end and a second end and the seat defines an opening. The stem assembly moves along the axis between a first position wherein the stem assembly contiguously engages the seat such that fuel flow through the opening is prevented and a second position wherein the stem assembly is spaced from the seat such that fuel flow through the opening is permitted. The first set of piezoelectric elements electromechanically extend and contract along the axis in response to a first electric field, and the second set of piezoelectric elements electromechanically extend and contract along the axis in response to a second electric field.

Abstract: A fuel injector comprising a valve member which is engageable with a valve seating to control fuel delivery from the injector, an actuator arrangement and an amplifier arrangement for transmitting movement of the actuator arrangement to the valve member. The amplifier arrangement comprises a piston member with which the actuator arrangement is cooperable to apply a retracting force to the piston member, and a control chamber for fluid. The amplifier arrangement preferably comprises a mechanical coupling arrangement for coupling movement of the piston member to the valve member upon application of an initial retracting force to the piston member.

Abstract: A fuel injection valve includes an orifice plate having a plurality of discharge orifices formed therein. A valve seat is disposed upstream of the discharge orifices and has a cylindrical fuel passage formed therein. A fuel cavity is formed between the cylindrical fuel passage and the orifice plate directly above the discharge orifices. A valve member is supported for reciprocating movement into and out of contact with the valve seat.

Abstract: A fuel injector for an internal combustion engine is provided. The fuel injector has a simple structure that is easy to install and remove a piezoelectric valve actuator in and from the fuel injector and to adjust fuel injection characteristics finely and that allows an overall size of the fuel injector to be decreased. The fuel injector includes a housing to be installed in the engine and a structural element serving to install the piezoelectric valve actuator in the housing to be detachable easily. The piezoelectric valve actuator is retained in an actuator casing fitted in the housing so that it can expand or contract to move a needle valve. The actuator casing has an extensible portion in itself or is coupled to a bellows in alignment for enabling the piezoelectric valve actuator to expand, thereby allowing the size of the actuator casing to be minimized.

Abstract: A nozzle for transferring a flow of liquid metal between metallurgical vessels or molds comprising an entry portion for receiving the liquid metal. A flow regulator, such as a stopper rod, is movable from an open position to a closed position with respect to the entry portion for respectively permitting and prohibiting flow through the nozzle. The entry portion and the flow regulator define a control zone therebetween. A pressure modulator, downstream of the control zone, is adapted to minimize a pressure differential across the control zone. The pressure modulator constricts flow downstream of the control zone.

Abstract: An engine fuel injector (10) having a fuel inlet tube (12) and a biasing spring (56) loading a solenoid actuated injection valve (50) within the injector (10) is provided with a calibration assembly (58) combining the calibration member (74) or tube with an internally mounted fuel inlet filter (76). The calibration member (74) may include a body (78) with an enlarged end (88) that is interference fitted within the fuel inlet tube (12) and an opposite stepped in end (80) forming a seat (82) which is engaged by the biasing spring (56). The fuel filter (76) has an enlarged annular base (92) fixed within the enlarged end (88) of the calibration member (74) and having an associated filter screen (98) or element through which fuel passing through the calibration member is filtered for passage through the injector (10).

Abstract: A fuel injector for an internal combustion engine includes a first injection valve having a first valve element that can be displaced in an axial direction and a first actuating device located axially downstream from the first injection valve to actuate the first injection valve. The fuel injector also has at least one second injection valve with a valve element that can be axially displaced and a second actuating device to actuate the second injection valve. The second actuating device is mounted axially downstream from the first actuating device in the valve housing, and the second actuating device to actuate the second injection valve is coupled to the latter by an actuating element, in the form of a cage-like arrangement, mounted in the valve housing in such a way that it can be displaced axially and bypasses the first actuating device.

Abstract: A nozzle for a fuel injector comprises a nozzle holder, a tip secured to the nozzle holder, the tip being provided with at least one outlet opening, and a feature provided on the tip providing an indication of the position(s) of the opening(s).

Abstract: An injector having a multilayer piezoelectric actuator for injection systems, in particular for common rail diesel injection systems, of motor vehicles, in which the body of the piezoelectric actuator has a square or rectangular cross-sectional contour and is seated, together with a two-legged prestressing bracket that is mounted along opposed outer sides of the actuator body, inside a longitudinal bore of the injector body. The longitudinal bore has a polygonal cross-sectional shape with rounded corners, the shape is adapted to the cross-sectional contour of the actuator body and the prestressing bracket, so that outside the longitudinal bore, space is created in the injector body for a high-pressure bore located parallel to the longitudinal bore of the injector.

Abstract: A high pressure gaseous fuel injector for injecting natural gas or other gaseous fuels at high pressures (eg. 300 to 700 psig more or less) into combustion engines for improved efficiency, better performance and reduced environmental emissions. The fuel injector is powered by hydraulic signals from an electrohydraulic valve. The fuel injector includes an outer cartridge housing and a universal valve cartridge mounted therein. The cartridge comprises an activator body and a valve body secured together, and the valve body has a gas valve slidable therein. The stroke of the valve is adjustable by controlling the size of shims in the valve body assembly, thereby providing a universal valve cartridge that can be easily adapted to differing fueling requirements for models and sizes of engines. The valve body includes a spring chamber between upper and lower valve guides.

Abstract: A fuel injector includes an injector body that defines a nozzle outlet. A needle valve member is mounted in the injector body and moveable a lift distance between an open position in which the nozzle outlet is open, and a closed position in which the nozzle outlet is blocked. A piezoelectric actuator is mounted in the injector body and is moveable a piezo distance between an off position and an on position. A coupling linkage interconnects the needle valve member to the piezoelectric actuator such that a movement of the piezoelectric actuator is multiplied into a larger movement of the needle valve member.

Abstract: A laminated fuel swirl element is employed, in which a strong swirl force flow is imparted to the fuel at a remote position relative to an injection hole, while on the other hand, at a position near the fuel injection hole, a weak swirl force is imparted to the fuel. A complex solid cone spray can be obtained in this way, which spray has a superior dispersion characteristic obtained by attracting small diameter droplets, which are generated at an outer peripheral portion of the spray, through a spray portion which is generated in the vicinity of a central area of the spray and has a large velocity.

Abstract: A flow mixer apparatus and method in an injection molding system which transitions a flowing medium around an obstruction and/or a degree change in direction, said flowing medium exhibiting reduced stagnation points and substantially uniform flow characteristics downstream of the obstruction and/or change in direction.

Abstract: A fuel injection valve, in particular for fuel injection systems of internal combustion engines, includes a magnet coil, an armature acted upon in a closing direction by a return spring, and a valve needle, in nonpositive engagement with the armature, for actuation of a valve closure element that, together with a valve seating surface, forms a sealing fit. At least one fuel conduit through which fuel flows is provided in the armature and/or in the valve needle. An impact element is mounted on the valve needle in the spray-discharge direction of the fuel conduit.

Abstract: Disclosed is a fuel injection valve having at least two valve body parts, which each contact one another at a respective contact face and pressed against one another perpendicular to the contact face by a clamping device. An inflow conduit for fuel formed in both valve body parts passes through the contact faces, and a high fuel pressure prevails in it. At least one radially widened portion is embodied in the inflow conduit, near the contact face of at least one valve body part, so that this radially widened portion, as a result of the fuel pressure in the inflow conduit, undergoes an expansion in the axial direction. As a result, the region of the contact face surrounding the inflow conduit is pressed against the contact face of the contacting valve body part, so that the contact pressure of the contact faces increases, whereby the inflow conduit is thus better sealed off, and the force of the clamping device can be reduced.

Abstract: A fuel injection valve for internal combustion engines having a valve member axially displaceably guided in a bore of a valve body, the end of which valve member toward the combustion chamber has a valve sealing face that to control the passage of fuel to an injection opening discharging into the combustion chamber of the engine cooperates with a valve seat provided on the end of the bore toward the combustion chamber, and having a guide face on the end of the valve member remote from the combustion chamber, which guide face guides the valve member slidably displaceably in the bore. In the guide face of the valve member, many recesses are provided, which center the valve member hydraulically in the bore.

Abstract: The present invention provides an assembly for dispensing a lubricant. The assembly comprises a housing with a cavity and a nozzle member connected to the housing. The housing further includes a lubricant passage connectable to a source of pressurized lubricant and a fluid pressure inlet passage connected to a source of fluid pressure. The assembly further includes a piston member having a predetermined configuration with a first side in fluid communication with the fluid pressure passage and a second side and having a piston cavity formed within. There is a first bore extending through the piston. A retainer member is connected to such first side of the piston member. A valve device is biased by an urging device against the first bore preventing grease from exiting. Another urging device biases the piston to such closed position. A push rod is disposed within the first bore and extends a predetermined distance beyond an end of the second side of the piston.

Abstract: A high pressure gaseous fuel injector for injecting natural gas or other gaseous fuels at high pressures (eg. 300 to 700 psig more or less) into combustion engines for improved efficiency, better performance and reduced environmental emissions. The fuel injector is powered by hydraulic signals from an electrohydraulic valve. The fuel injector includes an outer cartridge housing and a universal valve cartridge mounted therein. The cartridge comprises an activator body and a valve body secured together, and the valve body has a gas valve slidable therein. The stroke of the valve is adjustable by controlling the size of shims in the valve body assembly, thereby providing a universal valve cartridge that can be easily adapted to differing fueling requirements for models and sizes of engines. The valve body includes a spring chamber between upper and lower valve guides.

Abstract: The injector comprises a tip having at least one outlet orifice (7) for fuel delivered to an engine combustion chamber. A ceramic coating (14) is deposited on the external face of the tip, preferably in a kink (12) bounding a recess in this external face, at least around and immediately downstream of the outlet orifice (7) relative to the direction in which the fuel is delivered. This invention is applicable to fuel injectors with a ceramic coating to protect against deposits of carbon oil for use with spark-ignition and direct injection internal combustion engines.

Abstract: A unit fuel injector of the type with an open injector comprises an injector body (1) with an axial space (4), which ends in an injector cap (3), an injection plunger (15) guided in the axial space and serving as a closing-off element, which injection plunger forms in the axial space a pressure space (23) from which the injection bores (60, 61) of an upper row (60) and a lower row (61) extend.

Abstract: A fuel injector comprising a valve needle slidable within a bore formed in a nozzle body, the valve needle including an axially extending fuel supply passage which communicates with at least one outlet opening provided in the valve needle, the end of the supply passage adjacent the at least one outlet opening being closed by a plug. The plug has an inner end region which is arranged to be located, in use, adjacent the, or at least one of the, outlet openings, and shaped to modify the flow characteristics of the fuel flow upstream of at least one of the outlet openings.

Abstract: A fuel injector has an actuator for generating a lifting movement and a lift translator filled with a hydraulic medium and deformable in the lifting direction, for transferring the lifting movement of the actuator to a valve needle, provision being made for a compensating chamber for the hydraulic medium, the compensating chamber being connected to an interior space of the lift translator via a throttle opening and enclosed by an elastic casing. Thus, temperature-related quasistatic deformations of actuator, lift translator, and/or valve needle can be compensated for by an exchange of the hydraulic medium between the interior space of the lift translator and the compensating chamber, while the comparatively fast lifting movements of the actuator are transmitted to the valve needle essentially without damping.

Abstract: A valve control unit for a fuel injection valve, has a housing body, in which two valve control chambers that communicate continuously with one another are provided. The first valve control chamber communicates fuel with an inflow conduit for fuel pressure on a terminal member of a valve control piston which is displaceable in the housing body and the second valve control chamber communicates with a closable outlet conduit. A mechanical stop for limiting the mobility of the valve control piston in the direction of the second valve control chamber is embodied on the housing body. The quantity of preinjected fuel can be minimized by the volume of fuel in the first valve control chamber.

Abstract: A nozzle assembly allows a metered dose of lubricant to be dispensed. It comprises a housing and a piston assembly. The housing defines a piston bore, a stem bore and a spout, all of which axially aligned. It also defines a lubricant passage, an air inlet, and a channel linked to the inlet. Connectable to a source of lubricant, the passage communicates with the stem bore. Connectable to a source of air, the inlet communicates with the stem bore at a position between the passage and spout. The piston assembly has a piston with stem and a spring. The piston lies in the piston bore, its back communicating with the channel. The protrudent end of the stem protrudes into the stem bore and has a groove defined about its circumference. The spring biases the piston assembly into a charge position wherein the groove aligns with the passage. This enables the groove to fill with lubricant.

Abstract: An electronically controlled micro-dispensing apparatus (10) is described. The apparatus includes a container (12), an adaptor (18), a nozzle (28) and a control circuit (34 or 42). The container is filled with the chemical (104) and propellant (102). The adaptor, nozzle and control circuit are removable from the container and are reusable. The control circuits controls the length of pulse and the time duration between each pulse. By controlling these factors, the apparatus dispenses a precise amount of liquid over a set time period. The ejector allows for controlled dispensing and allows the liquid to be sprayed a greater distance. In the preferred embodiment, the apparatus are used to dispense a pheromone in an outdoor setting, such as an orchard (100), to control insects.

Abstract: A valve includes an orifice disk element having at least two sheet metal layers lying in sandwich fashion against one another. The orifice disk element includes at least a base region with the opening geometry necessary for spray discharge of the medium, and a seat region with a valve seat surface, so that the valve seat and orifice disk function are combined in one metal laminate element. The valve is suitable in particular for use in fuel injection systems of mixture-compressing, spark-ignited internal combustion engines.

Abstract: Valve, in particular glue valve, having a magnetostrictive actuator (14) for actuating a closure member (15) in consequence of a change in a magnetic field. In order to nullify the effects of uncontrolled changes in length of the actuator (14), in particular in consequence of temperature fluctuations, the actuator (14) is connected to a holder, more specifically a holding block (23), which can be moved with inertia.

Abstract: A fuel injection valve having a swirl disk, located downstream from a valve seat (15), that is made of at least one metallic material and has at least two swirl channels emptying into a swirl chamber, with all layers being built up by electrodeposition (multilayer electroplating) so that they adhere firmly to each other. The swirl disk has an upper layer that includes multiple material areas separated from each other by opening structures. The material areas of the swirl disk rest against a valve seat body containing the valve seat. The fuel injection valve is especially suitable for injecting fuel directly into the combustion chamber of a mixture-compressing internal combustion engine with externally supplied ignition.

Abstract: A compact spray valve that provides an extended atomizing air cap for reaching between tightly spaced electronic components. The compact spray valve of the present invention includes an air body, a fluid control body and an extended atomizing air cap. The atomizing air cap along with a seat extension provides a plurality of laminar air flow conduits causing atomization of a fluid into a spray. The resulting spray pattern can be controlled to provide a narrow line spray pattern with clearly defined edges. Another embodiment of the present invention provides a flat spray pattern.

Abstract: A fuel injection valve is is described. The fuel injection valve includes a swirl disk downstream from a valve seat, the swirl disk being made of at least one metallic material, having at least two swirl channels opening into a swirl chamber, and in which all layers are adheringly deposited directly one on top of the other by electroplating (multilayer electroplating). A perforated spray disk having an outlet opening shaped so that it directly influences the flow of the fuel exiting through the outlet opening of the swirl disk is arranged directly downstream from the swirl disk. The fuel injection valve is particularly well suited for direct injection of fuel into the combustion chamber of a compressed mixture externally ignited internal combustion engine.

Abstract: A device for applying free-flowing material to a movable substrate (1), especially for intermittent application of liquid adhesive. At least one supply channel (46) feeds free-flowing material and at least one nozzle unit (8) with at least one output channel is connected with the supply channel (46) and ends in an output orifice for delivering material. A valve mechanism interrupts the flow of material and includes a movable valve body (14) and a valve seat (44). The valve body (14) interacts with the valve seat (44) in such a way that the flow of material is interrupted by movement of the valve body (14) to a closed position and released by movement into an open position. The valve body (14) comes into contact with the valve seat (44) to interrupt the flow of material through a movement contrary to the direction of flow of the material.

Abstract: An atomizer disk is composed of at least one metallic material, is configured with at least one inlet opening in an upper cover layer and at least one outlet opening in a lower base layer, and has at least two swirl channels that terminate into a swirl chamber, the swirl chamber being provided in a middle swirl generation layer. Through the inlet opening and the swirl channels, two flows of different natures (biflux) enter the swirl chamber. All the layers of the atomizer disk are built up directly onto one another by electroplating metal deposition (multilayer electroplating). The atomizer disk is suitable for use in a fuel injection valve, in particular a high-pressure injection valve for direct injection of fuel into a combustion chamber of a mixture-compressing, spark-ignited internal combustion engine.

Abstract: A fuel injector for an internal combustion engine is disclosed. The injector has a valve body, an injection hole which has a width larger than a height thereof, and a fuel reservoir on the downstream side of a seat portion of the valve body. The fuel reservoir has a side surface and a bottom surface. One part of the side surface imparts one velocity component oriented in the direction of width in the injection hole to the fuel flow along the one part of the side surface. Another part of the side surface imparts another velocity component oriented in the direction of width in the injection hole to the fuel flow along the another part of the side surface. The bottom surface is formed at right angles with the center axis of the injection hole. The injection hole is communicated with the fuel reservoir via the bottom surface thereof.

Abstract: An injection valve is described, in particular for direct injection of fuel into a combustion chamber of an internal combustion engine, with a valve body having a valve opening surrounded by a valve seat to form a spray opening, and with a valve needle which is pressed into its closed position, has a closing head and extends through the valve opening so that the closing head which works together with the valve seat is in contact with the valve seat on the spray side when the valve is closed.

Abstract: A valve for controlling fluids which, for its actuation, is provided with a fluid-filled coupling chamber which can be brought to high pressure by virtue of the fact that the valve is disposed between an actuator piston of a piezoelectric actuator and a piston that actuates a valve member and it is used for force and path transmission. To compensate for a leakage in the coupling chamber, a filling valve is provided, which is disposed on the piston that actuates the valve member and is switched by this piston with each stroke of the device. In this manner, the coupling chamber contains a largely constant volume and can also compensate for slight fill level changes caused by temperature differences. The valve is designated for use in fuel injection devices for internal combustion engines of motor vehicles.

Abstract: A fuel injection device for diesel engines, with a nozzle holder (1), the pressure channel (2) of which is connected with the fuel injection pump on the one side, with the nozzle on the other side, comprises a nozzle body (3) which is connected with the nozzle holder (1) by means of a nozzle adjusting nut (10). For sealing purposes, there is an intermediate disk (13) between nozzle holder (1) and nozzle body (3). To seal the high-pressure connection in the region of the pressure channels (2, 4), there is a deformable metal sealing body which rests on a sealing surface and is held in a conical seat (19) in the region of the opening of the pressure channel (2) of the nozzle holder (1).

Abstract: A piezoelectric injector for fuel-injection systems of internal combustion engines has a piezoactuator guided with spring pretensioning in a valve housing. The actuator presses a sealing piece onto its valve seat through an actuating part, with the actuating part consisting of a pressure pin passing through the piezoactuator and having a head part resting on piezoactuator. The pressure pin and piezoactuator are of the same length and are made of the same ceramic material, in operation the sealing piece is lifted off its valve seat by piezoactuator which is expanded when in the charged state.

Abstract: A fuel injector includes an injector body that defines a nozzle outlet. A needle valve member is mounted in the injector body and moveable a lift distance between an open position in which the nozzle outlet is open, and a closed position in which the nozzle outlet is blocked. A piezoelectric actuator is mounted in the injector body and is moveable a piezo distance between an off position and an on position. A coupling linkage interconnects the needle valve member to the piezoelectric actuator such that a movement of the piezoelectric actuator is multiplied into a larger movement of the needle valve member.

Abstract: A device for filling containers, particularly packaging containers such as cardboard packaging containers, on the packaging container, comprises a feed part and a closing part. To prevent the dripping of the substance distributed into the packaging container on the area around the fill opening the feed part is equipped with outlets which form an angle with the center axis of the feed part so that the upper ends of the outlets separate from each other. In the lower end of the feed part, the angle position of the outlets causes the liquid flows from different outlets to unit into one flow of liquid which, if necessary, can be fed into a container even through a small fill opening.

Abstract: A fuel injector comprising a nozzle body, a bore provided in the nozzle body within which a valve needle is slidable, the valve needle and the bore being shaped to include a guide region where the valve needle and the bore are of substantially identical diameter, the engagement between the valve needle and the bore in the guide region serving to guide the valve needle for sliding movement within the bore, wherein the fuel injector includes a collar extending around part of the nozzle body, the collar engaging the nozzle body to restrict dilation of the bore in at least part of the guide region.

Abstract: A fuel injector which is enabled to form a fuel spray efficiently and properly into a flat sector shape by improving the angle, dispersion and atomization of the spray and by optimizing the spray tip penetration. A slit-shaped nozzle outlet 4 is constructed such that its transverse walls from its inner end 9 to its outer end 10 have an included angle .gamma. of 20 to 180 degrees, such that an angle .beta. of 0 to 90 degrees is made between the axis of the fuel injector and the opening direction of the slit-shaped nozzle outlet 4, such that the nozzle outlet 4 is diverged outward from a plane joining the axis to the fuel injector and the inner end 9, and such that the opposite portions of the inner end 9 have a width W of 0.05 mm to 0.24 mm. By combining these constructions suitably, the fuel spray can be formed efficiently and properly into a flat sector shape thereby to improve the fuel injection characteristics.

Abstract: An apparatus and method for controlling the opening of a solenoid actuated valve in a sealant dispensing gun are disclosed. A proximity sensor is provided adjacent a portion of the needle valve stem in order to sense when the needle valve has reached its open position. A dispense timer is initiated when the proximity sensor indicates that the needle valve has reached its open position. In this manner, the needle valve may be maintained in its open position for the desired dispense time only without regard to the response time of the solenoid device. Also disclosed is an apparatus and method for adjusting the valve open limit of a sealant dispensing device which incorporates a solenoid or motor actuated valve open limit device. A flow sensor is located in-line with the sealant supply path of a dispensing gun in order to monitor the dispense weight during each valve open cycle. A moving average of the dispense rates may then be calculated and compared to predetermined limits.

Abstract: An electronically controlled micro-dispensing apparatus (10 or 210) is described. The apparatus includes a liquid storage container (12), a propellant container (16), a control circuit (34 or 42) and an ejector (28). In a second embodiment, the liquid and propellant are in the same container (212). The control circuits control the length of pulse and the time duration between each pulse. By controlling these factors, the apparatus dispenses a precise amount of liquid over a set time period. The ejector allows for controlled dispensing and allows the liquid to be sprayed a greater distance. In the preferred embodiment, the apparatus are used to dispense a pheromone in an outdoor setting, such as an orchard, to control insects.

Abstract: An improved fuel injector for an engine has a first passageway, a first outlet for the first passageway and a first fuel inlet for the first passageway. The injector further has a second passageway with a second outlet and a second fuel inlet. First and second pistons are movable within the first and second passageways. An apex chamber is defined by the first and second outlets of the first and second passageways. The injector has an outlet located downstream of the apex chamber. The first and second pistons are movable in the same direction simultaneously and expel fuel from the injector outlet.

Abstract: In a valve for the dosed discharge of fluids particularly a fuel injection valve for fuel injection systems of internal combustion engines, the valve includes in an valve housing at the front end of an injector housing a valve structure at a fluid discharge end of the valve housing and a stack of piezo elements disposed in the opposite end of the injector housing and a high pressure fluid passages leads to the fluid discharge end which is isolated from the area in which the stack of piezo elements is disposed and which is in communication with a low pressure drain passage such that the piezo elements are not exposed to the high pressure fluid. Isolation is obtained by a compensation cylinder movably disposed in an annular space between, and in sealing relationship with, the valve housing, the piezo stack being enclosed in a piezo guide tube which is sealingly connected to the valve housing.