摘要:
A piezoelectric actuator, and method of producing same, wherein electrically conductive contact tabs are applied onto metallization strips in such a way that a projecting region remains, so that in the event of cracks nevertheless occurring, such cracks run in the projecting region of the contact tab and are bridged electrically.
摘要:
In the operation of piezoactuators of multilayer construction, during the polarizing or during the operation of the piezoactuator tears can arise, due to voltages, in the metallization strips that are attached to the actuator on the outside for contacting the electrode layers. It is inventively proposed to install electrically conductive contact lugs directly at the stack or on the metallization strips such that a laterally protruding region remains, so that, even given arising tears, these nevertheless extend in the protruding region of the contact lug, and the tears are electrically bridged. Electrical terminal elements are provided so as the project above or laterally at the contact lugs.
摘要:
A piezoelectric component with a monolithic stack, has electrode layers and piezoceramic layers arranged alternately one on top of the other, the piezoceramic layers have a piezoceramic, and having at least one porous security layer arranged in the stack for the formation of a crack if mechanical overload of the stack should occur. The piezoelectric component has an infiltration barrier arranged between the security layer and a lateral surface section of the stack for suppressing the penetration of a foreign substance into the security layer. The piezoelectric component can be as a piezoactuator for controlling a valve, particularly a valve of an internal combustion engine.
摘要:
In a method for producing a multilayer encapsulation (1) of a piezo actuator (5) such that the piezo actuator (5) is protected towards the outside without having to use an additional enveloping housing-type structure, in order to produce the multilayer encapsulation (1), an electrically insulating elastic layer (10) is first applied to the surface of the piezo actuator (5), whereupon a metallic layer is applied to the electrically insulating elastic layer (10) so as to planarly cover the same.
摘要:
An example fuel injector orifice plate assembly includes a plastic plate within which is an orifice for metering and directing fuel flow in a desired spray pattern, and a metal support plate for supporting and maintaining the stability of the desired spray pattern generated by the orifices within the plastic plate. The orifice plate includes orifices sized to provide a desired spray pattern of fuel. The metal support plate is more rigid than the orifice plate and provides the desired strength and rigidity for withstanding the cyclical pressure fluctuations caused by operation of the fuel injector.
摘要:
A component includes a glass substrate, an organic light-emitting diode arranged on the glass substrate, and a glass cover arranged over the organic light-emitting diode. The glass cover is glued to the edge to the glass substrate. The cover is one produced from a glass plate by three-dimensional removal of material using a blasting method.
摘要:
A tubular spring is provided for receiving and pretensioning a piezoelectric or magnetostrictive actuator of an actuator unit, e.g., for actuating a fuel injector valve in internal combustion engines, wherein the tubular spring comprises at least two types of recesses, each comprising different maximum lateral extensions in the longitudinal direction of the tubular spring. The tubular spring is designed to comprise a uniform load distribution about the circumference of the tubular spring even without welding the longitudinal sides thereof abutting one another.
摘要:
A wire saw (S) for separating a plurality of ceramic components (11-16) from a ceramic component block (1) has a roller system (2), the roller system has a plurality of deflecting rollers (3-5) guiding a wire (6) to form a wire harp (7), wherein at least one of the deflecting rollers (3) is divided into separate discs (31-36) guiding a single wire winding (61-66) of the wire (6) and being inclined at an adjustable angle (a) of less than 90 DEG to an axle (A) connecting the centers (M1-M6) of the discs (31-36).
摘要:
A piezoelectric component, e.g., for use as an actuator of a fuel injection valve in a motor vehicle, may include a stack-shaped actuator body including a plurality of piezoelectric elements and inner electrode layers arranged in an alternating manner in a stacking direction, each inner electrode layer being connected alternately to one of two metalizations on an outer face of the stack in an electrically conductive manner. Each metalization is connected to an electrically conductive electrode structure via an electrically conductive contacting element (e.g., adhesive or solder). The stack-shaped actuator body has at least one predetermined breaking point, and the metalizations and/or the contacting elements have a recess in the region of the at least one predetermined breaking point.
摘要:
The invention relates to the prevention of injuries and material damage caused by doors (2) of stopped and/or parked motor vehicles (1) by means of at least one camera (4) which monitors the exterior (3) of, especially the space next to and/or above, the vehicle (1). According to the invention, a mode of operation monitoring the inner (7) and/or outer (8) door handle is activated and the exterior (3) of the motor vehicle (1) is monitored by means of the camera (4) if an evaluation unit (6) detects that a fixed or variable speed-related, acceleration-related, and/or distance-related threshold value (SW) is not met, e.g. when the vehicle (1) is stopped, or if said evaluation unit (6) detects that a signal unlocking the locking mechanism of the vehicle doors (2) is received while causing an acoustic, optical, and/or haptic warning signal to be issued as soon as a person actuates or unlocks optionally in an automated manner the vehicle door (2) handle (7, 8) even though a stationary (9) or approaching (10) object has been detected in the field of vision (5) of the camera (4).