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1. 发明申请

US20100320283A1 MULTI-LAYER PIEZOELECTRIC ELEMENT, METHOD FOR MANUFACTURING THE SAME, INJECTION APPARATUS AND FUEL INJECTION SYSTEM 有权
标题翻译：多层压电元件，其制造方法，注射装置和燃料注射系统
公开(公告)号：US20100320283A1
公开(公告)日：2010-12-23
申请号：US12744897
申请日：2008-11-27
申请人： Tetsuro Sata , Masahiro Sato
发明人： Tetsuro Sata , Masahiro Sato
IPC分类号： B05B1/08 , H01L41/22 , H01L41/083
CPC分类号： H01L41/337 , F02M51/0603 , H01L41/0831 , Y10T29/42
摘要： A multi-layer piezoelectric element that has high durability with capability to operable continuously under higher voltage and higher pressure over a long period of time, a method for manufacturing the same, an injection apparatus and a fuel injection system are provided.The multi-layer piezoelectric element, comprising: a multi-layer structure comprising a plurality of internal electrode layers and a plurality of piezoelectric material layers, the plurality of piezoelectric material layers being stacked with each one of the plurality of internal electrode layers intervened between each two of the plurality of piezoelectric material layers, wherein a cross-sectional area of a cross section of the multi-layer structure parallel to the plurality of internal electrode layers is smaller in both end portions in a stacked direction than in a middle portion in the stacked direction.
摘要翻译：一种具有高耐久性的多层压电元件，其具有能够在较高电压和较高压力下长时间连续操作的能力，其制造方法，注射装置和燃料喷射系统。所述多层压电元件包括：多层结构，包括多个内部电极层和多个压电材料层，所述多个压电材料层层叠在每个所述多个内部电极层中的每一个之间，多个压电材料层中的两个，其中与多个内部电极层平行的多层结构的横截面的横截面积在堆叠方向上的两个端部比在堆叠方向。

2. 发明授权

US08502434B2 Multi-layer piezoelectric element, method for manufacturing the same, injection apparatus and fuel injection system 有权
标题翻译：多层压电元件，其制造方法，注射装置和燃料喷射系统
公开(公告)号：US08502434B2
公开(公告)日：2013-08-06
申请号：US12744897
申请日：2008-11-27
申请人： Tetsuro Sata , Masahiro Sato
发明人： Tetsuro Sata , Masahiro Sato
IPC分类号： H01L41/083
CPC分类号： H01L41/337 , F02M51/0603 , H01L41/0831 , Y10T29/42
摘要： A multi-layer piezoelectric element that has high durability with capability to operable continuously under higher voltage and higher pressure over a long period of time, a method for manufacturing the same, an injection apparatus and a fuel injection system are provided. The multi-layer piezoelectric element, comprising: a multi-layer structure comprising a plurality of internal electrode layers and a plurality of piezoelectric material layers, the plurality of piezoelectric material layers being stacked with each one of the plurality of internal electrode layers intervened between each two of the plurality of piezoelectric material layers, wherein a cross-sectional area of a cross section of the multi-layer structure parallel to the plurality of internal electrode layers is smaller in both end portions in a stacked direction than in a middle portion in the stacked direction.
摘要翻译：一种具有高耐久性的多层压电元件，其具有能够在较高电压和较高压力下长时间连续操作的能力，其制造方法，注射装置和燃料喷射系统。所述多层压电元件包括：多层结构，包括多个内部电极层和多个压电材料层，所述多个压电材料层层叠在每个所述多个内部电极层中的每一个之间，多个压电材料层中的两个，其中与多个内部电极层平行的多层结构的横截面的横截面积在堆叠方向上的两个端部比在堆叠方向。

3. 发明授权

US09153769B2 Multi-layer piezoelectric element, and injection device and fuel injection system provided therewith for enhanced durability 有权
标题翻译：多层压电元件，以及具有提供耐久性的注射装置和燃料喷射系统
公开(公告)号：US09153769B2
公开(公告)日：2015-10-06
申请号：US13392320
申请日：2010-08-26
申请人： Tetsuro Sata
发明人： Tetsuro Sata
IPC分类号： H01L41/083 , H01L41/337 , F02M51/06 , H01L41/273 , H01L41/187
CPC分类号： H01L41/337 , F02M51/0603 , H01L41/0838 , H01L41/1875 , H01L41/273
摘要： A center of a multi-layer piezoelectric element is an active region and deforms to a greater degree than ends thereof which is an inactive region during driving operation, and is therefore more susceptible to stress concentration and crack development. To address this problem, a multi-layer piezoelectric element includes a columnar stacked body in which piezoelectric layers and internal electrode layers are alternately laminated, and a pair of external electrodes configured to bond to side faces of the columnar stacked body, wherein a side face of the columnar stacked body is configured so that a surface roughness of a center of the side face in a stacked direction of the columnar stacked body is greater than those of ends of the side face in the stacked direction of the columnar stacked body. This makes it possible to relax the stress exerted on the side face of the columnar stacked body, and thereby enhance the durability of the multi-layer piezoelectric element.
摘要翻译：多层压电元件的中心是有源区域，并且在驱动操作期间比作为非活性区域的端部更大程度地变形，因此更容易受到应力集中和裂纹展开。为了解决这个问题，层叠型压电元件包括层叠压电层和内部电极层的柱状层叠体和配置成与柱状层叠体的侧面接合的一对外部电极，柱状层叠体的层叠方向的侧面的中心的表面粗糙度比柱状层叠体的层叠方向的侧面的端部的表面粗糙度大。由此，能够缓和施加在柱状层叠体的侧面上的应力，从而提高层叠型压电元件的耐久性。

4. 发明申请

US20120187213A1 MULTI-LAYER PIEZOELECTRIC ELEMENT, AND INJECTION DEVICE AND FUEL INJECTION SYSTEM PROVIDED THEREWITH 有权
标题翻译：多层压电元件，注射装置和燃油喷射系统
公开(公告)号：US20120187213A1
公开(公告)日：2012-07-26
申请号：US13392320
申请日：2010-08-26
申请人： Tetsuro Sata
发明人： Tetsuro Sata
IPC分类号： F02M51/06 , H01L41/083
CPC分类号： H01L41/337 , F02M51/0603 , H01L41/0838 , H01L41/1875 , H01L41/273
摘要： A center of a multi-layer piezoelectric element is an active region and deforms to a greater degree than ends thereof which is an inactive region during driving operation, and is therefore more susceptible to stress concentration and crack development. To address this problem, a multi-layer piezoelectric element includes a columnar stacked body in which piezoelectric layers and internal electrode layers are alternately laminated, and a pair of external electrodes configured to bond to side faces of the columnar stacked body, wherein a side face of the columnar stacked body is configured so that a surface roughness of a center of the side face in a stacked direction of the columnar stacked body is greater than those of ends of the side face in the stacked direction of the columnar stacked body. This makes it possible to relax the stress exerted on the side face of the columnar stacked body, and thereby enhance the durability of the multi-layer piezoelectric element.
摘要翻译：多层压电元件的中心是有源区域，并且在驱动操作期间比作为非活性区域的端部更大程度地变形，因此更容易受到应力集中和裂纹展开。为了解决这个问题，层叠型压电元件包括层叠压电层和内部电极层的柱状层叠体和配置成与柱状层叠体的侧面接合的一对外部电极，柱状层叠体的层叠方向的侧面的中心的表面粗糙度比柱状层叠体的层叠方向的侧面的端部的表面粗糙度大。由此，能够缓和施加在柱状层叠体的侧面上的应力，从而提高层叠型压电元件的耐久性。

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