Geld, ETF, Indexing, passives Investment Tipps und Ratschläge, Alexander Becker – Channel. SubscribeSubscribedUnsubscribe USPTO patent applications submitted by and patents granted to Klaus Plecher. Klaus Plecher – Google+. Klaus Plecher. About. Posts. Looks like you’ve reached the end. Looks like you’ve reached the end. Unable to load more. Retry.
|Published (Last):||24 August 2006|
|PDF File Size:||12.50 Mb|
|ePub File Size:||16.26 Mb|
|Price:||Free* [*Free Regsitration Required]|
In addition, in this embodiment a peripheral klaue 34 c projecting comparatively little in the axial direction is provided on the cover 28 c, which collar 34 c does not rest against the collar 36 c inside or radially outside the latter, but comes into engagement with a corresponding groove in the upper side of the collar 36 c when the cover 28 c is fitted. Actuator ;lecher Actuating a Fuel Injection Valve.
USA1 – Actuating Drive for Actuating a Fuel Injection Valve – Google Patents
The actuating drive 10 forms, together with the fuel injection valve, a fuel injector plevher injecting fuel into the combustion chamber of an internal combustion engine. In the actuating drive according to an embodiment it is provided that the sealing arrangement is embodied in a gas-permeable manner and ends on the outer side in a cavity which is covered by a cover retained on the actuating drive by means of a catch connection.
At the same time, the cover provides protection against touching of the electrical contacts located below it. A fuel injector has a housing for an actuator 1especially to a klaux injector with a connector of a contact stud support injection-molded thereto.
A koaus exchange capability sufficient in practice between this cavity and the outside of the actuating drive plecherr the installation environment is already ensured by the latching principle described, since larger or smaller gaps always remain between the material of the cover 28 and the integral plastics injection molding 24 ; although these gaps prevent ingress of solid objects into the cavity, they do not prevent gas exchange to the degree which is of interest here.
A special feature of this sealing arrangement is that it is embodied plehcer a gas-permeable manner and therefore makes possible a gas exchange between the installation environment of the fuel injector and the actuator space in which the piezo actuator is contained. In the Figure, this cover 28formed as a plastics injection molding, is shown still separate from the other visible actuating drive components, but forms an upper end closure thereof on the finished fuel injector. During assembly of the pkecher drive 10the cover 28 is installed from above in the axial direction A, so that the free ends of the resilient tabs on the cover 28 impinge against the upper sides of the latching projections 32 on the integral plastics injection molding 24 klaua are flexed radially outwardly because the upper sides of said projections 32 are configured as oblique faces pleccher finally, upon flexing back, reach a latched state in which the radially outwardly projecting projections 32 come into engagement with the latching openings According to a further embodiment, the gas-permeability of the sealing arrangement can be created by a gas-permeable elastomer material.
In the following description of further exemplary embodiments the same reference characters are used for analogous components, but are supplemented by a lower-case letter to distinguish the embodiments.
The orientation of slots in the upper side of the cover 28 b, drawn straight in FIG. The plug connector 18 is an external connection device by means of which the actuating drive 10 and the fuel injector formed therewith can be connected to an external activation line arrangement for example, wiring harness in a motor vehicle in order to activate the piezo actuator in the desired manner for the injection of fuel.
A disadvantage of the known covering by means of injection-molding, however, is that the actuating drive components covered by the injection-molded plastics material frequently have to be configured in a special way with increased complexity and cost. Klaus Plecher, Marcus Unruh. In this situation not represented the cover 28 is retained reliably on the actuating drive 10 and protects the actuating drive components located below it, in particular the contact carrier 16 with its projecting welded connection between the ends of the contact pins 14 and the ends of the welding lugs According to a method for finishing the housing of a fuel injector having the aforementioned features, a laser beam used for a laser welding method is incident on the overlapping area 30 in a substantially perpendicular or substantially parallel orientation in relation to the axial direction A of the actuator 1 and laser-welds the actuator cover 20 to the casing The contact carrier 16 serves as a connecting device for the further electrical connection of the contact pins 14 of the piezo actuator to connection pins of a plug connector In this respect, simple final injection-molding of plastics material around the sealing arrangement is counterproductive, since such a covering would as a rule hinder the desired gas exchange.
The actuator cover 20 is laser-welded to the casing 10 in an overlapping area 30 between the actuator cover 20 and the casing To improve a spring effect of the projections 32 b, in pledher embodiment the corresponding resilient tabs extend into the upper side of the cover 28 b.
It is worth mentioning that the attachment of the cover by means of latching has no negative influences on the components for example, the piezo actuator already mounted on or in the actuating drive.
Klaus Plecher – Google+
In this description, essentially only the differences from the exemplary embodiment or embodiments already described will be discussed and, furthermore, reference is expressly made here to the description of preceding exemplary embodiments. According to a further embodiment, the cavity may directly adjoin an end face of the plastics molding oriented away from the piezo actuator. Furthermore, a sleeve of insulating material, which effects centering and electrical insulation of the contact pin, is inserted in each opening below the sealing ring.
Alternatively or additionally, such openings may be provided in the cover The sealing arrangement is embodied in a liquid-tight but gas-permeable manner and ends in a cavity on the outer side, the cavity being covered by a cover 28 held on the actuating drive by means of a catch connection 30, During the injection molding process the space situated above the centre of the contact carrier 16 is left open and may remain as an advantageous cavity in the finished actuating drive.
The sealing arrangement is embodied in a liquid-tight but gas-permeable manner and ends in a cavity on the outer side, the cavity being covered by a cover 28 held on the actuating drive by means of a catch connection 30, In order to ensure a reliable seal even for comparatively thin top plates 16 in particular, the invention proposes placing pleher O-ring 28 made from an elastic sealant material on each of the terminal pin sections 30 protruding from the openings 16so that said O-ring fits tightly to a circumferential surface 32 of the terminal pin section 30as well as to the top plate 14forming a seal, and being pressure-injected into the top plate 14 by means of a plastic extrusion coating arrows in FIG.
Actuator for actuating a fuel injection valve. Through the extremely simple assembly step of klasu the components together, it is achieved with certainty that the piezo actuator located inside the actuating drive will not be damaged.
The actuating drive according to claim 7wherein the plastics molding contains at least one gas exchange passage. With this design there is an increased danger of ingress of harmful media engine oil, fuel-diluted engine oil, water, or vapors thereof into the interior of the fuel injector.
According to a further embodiment, the connecting device may include an electrically insulating plastics molding, fitted over the contact pins of the piezo actuator, which molding may include openings through which the contact pins can pass and carries integrally molded electrically conductive connecting elements, each associated with one of the openings, which extend in each case from a contacting section adjacent to the associated opening, for contact with the protruding contact pin, to one of the contact pins projecting from the plastics molding.