
Fuel System 114 Diesel Control System
Operation Principle
PIEZO ACTUATOR
The Piezo Actuator is made up of several floors of cylindrical piezo-ceramic (height: approximately 90
㎛
).
This lengthens by from 1.5% through 2.0% of its length if voltage is applied (Piezoelectric Converse Effect) and this
length is “Stroke”. The number and the cross section of the ceramic are proportional to the actuator’s stroke and
output respectively.
HYDRAULIC COUPLER
. The hydraulic coupler is located under the piezo actuator and amplifies the actuator’s output by the cross section
ratio of the upper and the lower pistons. At this time, the actuator’s stroke is lengthened. The hydraulic oil is the fuel
and the oil pressure to operate the hydraulic coupler normally is from 1 through 10 bar.
Содержание S220P
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