| 摘要 |
An actuator for a fuel injector, including a hollow cylindrical spring member, one end of the hollow cylindrical spring member being supported by the actuator housing, the other end of the hollow cylindrical spring member forming a piston slidably inserted into the cylinder bore of the actuator housing and defining a cylinder chamber, wherein a piezoelectric element is inserted into the hollow cylindrical spring member and is supported between the actuator housing and the hollow cylindrical spring member.
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