A piezoelectric injector includes: a first piezo actuator and a second piezo actuator; a control valve connected to the first piezo actuator and the second piezo actuator through a control piston; at least one drain chamber in which the control valve and the control piston are movably received; a…
Metering device (1) for an electrically insulating liquid or gaseous medium (2), comprising a nozzle (3) with a nozzle needle (4), wherein the flow rate of the medium (2) through the nozzle (3) is controllable via a linear movement of the nozzle needle (4), wherein as an actuator for the linear…
The invention regards a valve assembly arrangement (2) for an injection valve (1), comprising a first valve assembly (3) and a second valve assembly (4), wherein the latter is axially arranged adjacent to and coupled to the first valve assembly (3), wherein the second valve assembly comprises a…
An actuator assembly (12) of a fuel injector (10) has an elongated body provided with an internal bore (22) extending from an opening (24) to a bottom face (26) and wherein a servo actuator member (46) is arranged to extend and retract in order to cooperate with a valve member. The actuator…
An actuator assembly (12) of a fuel injector (10) has a body (14) provided with an internal cavity (22) wherein an inner shoulder face (44) is arranged between a large bore (24) and a thinner conduit (30). A servo actuator member (32) is arranged in the cavity (22) and it has an outer shoulder face…
The invention relates to a piezoelectric actuator module (10) comprising an actuator foot (16), an actuator head (18), and a piezoelectric actuator (20) arranged between the actuator foot (16) and the actuator head (18), the piezoelectric actuator (20) consisting of a plurality of electrode layers…
The present invention relates to a fuel injector (1) having at least one triggering mechanism (10) providing the movement of at least one trigger (50) for spraying the fuel when desired, in order to be used in internal combustion engines. As an improvement, the present invention is characterized in…
The invention relates to a fuel injector (10), in particular a common-rail injector, with an injector housing (11) in which a high-pressure chamber (17) is formed, which can be supplied with pressurized fuel via a supply bore (57) formed in the injector housing (11), with at least one injection…
The invention relates to a nozzle assembly for a fuel injector for injecting fuel into a combustion chamber of an internal combustion engine, comprising a nozzle body (1) and a nozzle needle (2) which is received in a stroke-variable manner for opening and closing at least one injection opening (3)…
The invention relates to a fuel injector for injecting fuel into a combustion chamber of an internal combustion engine, comprising a nozzle body (1) and a nozzle needle (2) which is displaceably received for releasing and closing at least one injection opening (3) in a high-pressure bore (4) of the…
The invention relates to a fuel injector for injecting fuel into a combustion chamber of an internal combustion engine, comprising a nozzle body (1) and a nozzle needle (2) which is accommodated with axial stroke movement for releasing and closing at least one injection opening (3) in a…
There are provided a multi-layer piezoelectric element which is capable of suppressing separation of an external electrode plate, as well as a piezoelectric actuator, an injection device, and a fuel injection system that are provided with the multi-layer piezoelectric element. A multi-layer…
The invention relates to a nozzle assembly for a fuel injector for injecting fuel into a combustion chamber of an internal combustion engine, comprising a nozzle body (1) and a nozzle needle (2) which is received in a stroke-movable manner to release and close at least one injection opening (3) in…
The invention relates to a fuel injector (10) with an injector housing (11) which forms a high-pressure chamber (30) connectable to a high-pressure source (33), in which an injection valve member (13) is arranged so as to be movable in stroke motion. According to the invention, it is provided that…
The invention relates to a hydraulic coupler 4 having an actuating piston 7 cooperating with an actuator 3 and an actuating piston 10 operatively connected to the actuating piston 7 via a fluid-filled coupler chamber 9 arranged in a coupler housing 8 with an adjustable transmission ratio. According…
Fuel injection valve for internal combustion engines with a housing (1), in which an injection needle (12) is arranged longitudinally displaceable for opening and closing an injection opening (15), which with its end face facing away from the injection openings (15) delimits a control chamber (20)…
A fuel electro-injector for a fuel injection system for an internal combustion engine, having an atomizer equipped with a nozzle (11) and a valve needle (12) defining a discharge section (14) that is annular and has a width that continuously increases as the opening stroke of the valve needle (12)…
An outer electrode (17) for a multilayer component (2) comprises a first conductive layer (22) and a second conductive layer (23). The first conductive layer (22) has a connection region (20) in which a lead (18) is bonded to the first conductive layer (22) by welding in a materially closed manner…
The invention relates to a piezoelectric actuator (20) for an arrangement (10) through which a medium flows, having multiple piezoelectric elements (16) and a protective system (35) surrounding the multiple piezoelectric elements (16), wherein the protective system (35) comprises at least one layer…
A fuel injector including: piezoelectric actuation means, a valve arrangement comprising a nozzle including a valve seat, and a valve needle, said needle adapted to be slidable within said nozzle so as to selectively open and close the valve by respective disengagement/ engagement of the needle…
There are provided a multi-layer piezoelectric element in which an increase of oxygen vacancies in an electric-field concentration part of piezoelectric layers is suppressed and a decrease of an amount of displacement is suppressed, as well as to provide a piezoelectric actuator, an injection…
Valve assembly (14) of an injection valve (10), the valve assembly (14) comprising a valve body (20) including a central longitudinal axis (A), the valve body (20) comprising a cavity (24) with a fluid outlet portion (28), a valve needle (22) axially movable in the cavity (24), the valve needle…
There are provided a multi-layer piezoelectric element that is driven stably for a long period of time without developing cracks in a junction between a metallized layer and a lead member or a stacked body, and an injection device and a fuel injection system provided with the same. A multi-layer…
There are provided a multi-layer piezoelectric element which is capable of suppression of occurrence of an imperfect area, suffers from no development of leakage current even with moisture intrusion, has long-term freedom from variations in displacement and can achieve stable driving, as well as to…
[Solution] There are provided a multi-layer piezoelectric element which suppresses damage or separation of an external electrode and improves durability, as well as an injection device and a fuel injection system using the multi-layer piezoelectric element. [Solution] A multi-layer piezoelectric…
The subject matter invention is an injection valve (10) comprising a body (13); an actuator region (20); and a piston region (30), characterized by comprising at least one drive member (25) which exists in bedded form at a vicinity of said shell (23) and which provides the actuator region (20) to…
The valve has a valve sealing surface cooperating with a valve seat (7) for opening and closing an injection opening (10). A pressure chamber (5) is filled with fuel under injection pressure, and hydraulic forces are developed on a valve needle (8) and are raised with contact of the valve needle on…
[Problem] Provided is a multi-layer piezoelectric element in which extension of a crack from an end face thereof is suppressed to improve the durability, and an injection device and a fuel injection system using the same. [Solution] A multi-layer piezoelectric element (1) includes a columnar…
The fuel injection component (100) has a component (10) that is arranged along a longitudinal axis (17). The component is arranged in a guiding hole (16) of a guiding component (12) under formation of a radial gap (13). The radial gap is formed in different size between the component and the…
[Problem] Provided is a multi-layer piezoelectric element which has no decline in the amount of displacement even under a condition of long-time use, and can protect a surface against adsorption of the content of moisture and impurities, thereby preventing occurrence of short-circuiting. [Solution]…