Invention Grant
US08049397B2 Laminated piezoelectric element, jetting device provided with the laminated piezoelectric element and fuel jetting system 有权
叠层压电元件,设置有层叠压电元件和燃料喷射系统的喷射装置

  • Patent Title: Laminated piezoelectric element, jetting device provided with the laminated piezoelectric element and fuel jetting system
  • Patent Title (中): 叠层压电元件,设置有层叠压电元件和燃料喷射系统的喷射装置
  • Application No.: US12516793
    Application Date: 2007-11-29
  • Publication No.: US08049397B2
    Publication Date: 2011-11-01
  • Inventor: Takeshi Kato
  • Applicant: Takeshi Kato
  • Applicant Address: JP Kyoto
  • Assignee: Kyocera Corporation
  • Current Assignee: Kyocera Corporation
  • Current Assignee Address: JP Kyoto
  • Agency: Procopio, Cory, Hargreaves & Savitch LLP
  • Priority: JP2006-320969 20061129
  • International Application: PCT/JP2007/073021 WO 20071129
  • International Announcement: WO2008/066098 WO 20080605
  • Main IPC: H01L41/083
  • IPC: H01L41/083
Laminated piezoelectric element, jetting device provided with the laminated piezoelectric element and fuel jetting system
Abstract:
There are some cases where cracks occur at a plurality of areas on an external electrode when a displacement quantity of a laminated piezoelectric element is large. In such cases, there is a possibility of a voltage not being applied to a portion of the laminated structure due to the cracks caused by a long time drive to cause a reduction in the displacement quantity. A low rigidity layer is arranged on the laminated structure to form a plurality of portions divided by the low rigidity layer in a laminating direction. Each portion is provided with power feeding members on the anode side and the cathode side. Thus, a voltage can be stably supplied to each internal electrode.
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