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1. (WO2001031187) ACTUATOR
Latest bibliographic data on file with the International Bureau   

Pub. No.: WO/2001/031187 International Application No.: PCT/DE2000/003698
Publication Date: 03.05.2001 International Filing Date: 21.10.2000
IPC:
F02M 63/00 (2006.01) ,H01L 41/053 (2006.01) ,H01L 41/083 (2006.01)
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02
COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
M
SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
63
Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/-F02M57/143; Details, component parts or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/-F02M61/193
H ELECTRICITY
01
BASIC ELECTRIC ELEMENTS
L
SEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
41
Piezo-electric devices in general; Electrostrictive devices in general; Magnetostrictive devices in general; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
02
Details
04
of piezo-electric or electrostrictive elements
053
Mounts, supports, enclosures or casings
H ELECTRICITY
01
BASIC ELECTRIC ELEMENTS
L
SEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
41
Piezo-electric devices in general; Electrostrictive devices in general; Magnetostrictive devices in general; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
08
Piezo-electric or electrostrictive elements
083
having a stacked or multilayer structure
Applicants: RUEHLE, Wolfgang[DE/DE]; DE (UsOnly)
STIER, Hubert[DE/DE]; DE (UsOnly)
BOEE, Matthias[DE/DE]; DE (UsOnly)
HOHL, Guenther[DE/DE]; DE (UsOnly)
KEIM, Norbert[DE/DE]; DE (UsOnly)
ROBERT BOSCH GMBH[DE/DE]; Postfach 30 02 20 70442 Stuttgart, DE (AllExceptUS)
Inventors: RUEHLE, Wolfgang; DE
STIER, Hubert; DE
BOEE, Matthias; DE
HOHL, Guenther; DE
KEIM, Norbert; DE
Priority Data:
199 51 012.122.10.1999DE
Title (EN) ACTUATOR
(FR) ACTIONNEUR
(DE) AKTOR
Abstract:
(EN) The invention relates to an actuator (1), especially for actuating fuel injection valves used in fuel injection systems of internal combustion engines. According to the embodiment of the invention, the actuator comprises a plurality of piezoelectric or magnetostrictive layers (2) stacked on top of one another. The actuator (1) is prestressed by a tie rod (6) located in a central recess (5) by means of opposite threads (7 and 8). The fixation and the power transmission is achieved by means of a cover plate (3) and a base plate (4). The actuator can also be prestressed by a jacket (9) surrounding the actuator (1) that transmits, by means of flanged projecting ends (10), an axial force component to the layers (2) via the cover plate (3) and the base plate (4).
(FR) L'invention concerne un actionneur (1), notamment pour l'actionnement de soupapes d'injection de carburant destinées à des systèmes d'injection de carburant de moteurs à combustion interne. L'actionneur (1) selon l'invention comprend, dans l'exemple de réalisation, plusieurs couches empilées (2) d'un matériau piézoélectrique ou magnétostrictif. Il est précontraint par un tirant (6) logé dans un évidement central (5) au moyen d'un filetage opposé (7 et 8). La fixation et la transmission de force se font par l'intermédiaire d'une plaque de couverture (3) et d'une plaque de fond (4). Il est également possible de générer la précontrainte par une enveloppe (9) entourant l'actionneur (1) qui transmet, par rabattage des projections (10), une composante de force axiale aux couches (2) par l'intermédiaire de la plaque de couverture (3) et de la plaque de fond (4).
(DE) Ein Aktor (1), insbesondere zur Betätigung von Brennstoffeinspritzventilen für Brennstoffeinspritzanlagen von Brennkraftmaschinen, weist im Ausführungsbeispiel mehrere gestapelt angeordnete Schichten (2) aus einem piezoelektrischen oder magnetostriktiven Material auf. Der Aktor (1) wird durch einen in einer zentralen Ausnehmung (5) angeordneten Zuganker (6) mittels gegenläufiger Gewinde (7 und 8) vorgespannt. Die Fixierung und Kraftübertragung erfolgt über eine Deckplatte (3) und eine Bodenplatte (4). Die Vorspannung kann auch durch eine den Aktor (1) umgebende Ummantelung (9) erzeugt werden, der durch Umbördeln von Überständen (10) eine axiale Kraftkomponente über die Deckplatte (3) und die Bodenplatte (4) auf die Schichten (2) überträgt.
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Designated States: BR, CN, JP, KR, US
European Patent Office (EPO) (AT, BE, CH, CY, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE)
Publication Language: German (DE)
Filing Language: German (DE)