| 发明名称 |
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| 摘要 |
A piezoelectric actuator comprises a housing having an inside cavity in which is mounted a column of piezoelectric elements having interleaved electrodes. The column of piezoelectric elements is mounted within a sealed enclosure which divides the inside cavity of the housing into an inner space receiving the column of piezoelectric elements and an outer space. The inner space is filled with a flowable, electrically insulative, thermally conductive material such as silicone oil held in direct contact with and in a heat transfer relationship with the column of piezoelectric elements. The silicone oil serves to isolate the column of piezoelectric elements and the electrodes from moisture and other foreign materials that would otherwise affect an insulation breakdown voltage. A cooling liquid is adapted to be circulated through the outer space surrounding the enclosure to absorb heat transferred thereto from the column of piezoelectric elements through the flowable thermally conducting material. The piezoelectric actuator may be incorporated with a fuel injection nozzle to form a pump injector which pressurizes and injects fuel at each energization of the column of piezoelectric elements. |
| 申请公布号 |
JPH0427715(B2) |
申请公布日期 |
1992.05.12 |
| 申请号 |
JP19830209875 |
申请日期 |
1983.11.10 |
| 申请人 |
NIPPON JIDOSHA BUHIN SOGO KENKYUSHO KK;TOYOTA JIDOSHA KK |
发明人 |
ABE MASAYUKI;SAKAKIBARA YASUYUKI;TOMITA MASAHIRO;SHINODA KAZUO |
| 分类号 |
F02M51/06;F02M51/04;F02M53/00;F02M57/02;F02M63/00;F16K31/02;H01L41/053;H01L41/083 |
主分类号 |
F02M51/06 |
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