PIEZOELEKTRISCHER AKTOR
    5.
    发明公开
    PIEZOELEKTRISCHER AKTOR 有权
    压电作动器

    公开(公告)号:EP2586072A1

    公开(公告)日:2013-05-01

    申请号:EP11727968.7

    申请日:2011-06-22

    申请人: Robert Bosch GmbH

    IPC分类号: H01L41/047 F02M51/06

    CPC分类号: H01L41/0472 F02M51/0603

    摘要: The invention relates to a piezo-electric actuator (1), which is used in particular as an actuator for fuel injection valves, comprising an actuator body (3), which has a plurality of ceramic layers (4) and a plurality of electrode layers (5, 6) arranged between the ceramic layers (4), and outside electrodes (7, 8), which are alternately in electrical contact with the electrode layers (5, 6). The outside electrodes (7, 8) are formed of corrugated metal sheets (7, 8), which preferably have corrugations (16, 17) that are arranged obliquely with respect to the longitudinal axis (10) of the actuator body.

    VENTILEINRICHTUNG, INSBESONDERE EIN KRAFTSTOFFEINSPRITZVENTIL FÜR EINE BRENNKRAFTMASCHINE
    7.
    发明公开
    VENTILEINRICHTUNG, INSBESONDERE EIN KRAFTSTOFFEINSPRITZVENTIL FÜR EINE BRENNKRAFTMASCHINE 有权
    阀装置,尤其是燃料喷射阀用于内燃发动机

    公开(公告)号:EP1664524A1

    公开(公告)日:2006-06-07

    申请号:EP04762530.6

    申请日:2004-07-28

    申请人: ROBERT BOSCH GMBH

    发明人: KEGEL, Timo

    摘要: Disclosed is a valve mechanism, especially a fuel injection valve for an internal combustion engine, comprising a valve element whose switching position at least indirectly depends on the switching mode of a piezo actuator. Said piezo actuator is impinged upon by a tubular and overall cylindrical biasing device (30) that is made from a plate-shaped starting material and is provided with two abutting longitudinal edges (42, 44) such that the longitudinal rigidity is modified in said area. The inventive biasing device (30) encompasses at least one zone (52) whose longitudinal rigidity is different from that of an adjacent zone and which is disposed relative to the abutting longitudinal edges (42, 44) in such a way that the bending moment (M) which is generated as a result of the modified longitudinal rigidity in the area of the abutting longitudinal edges (42, 44) and acts upon the piezo actuator is reduced.