Actuator is armored type DC proportional electromagnet, refueling direction driving force in proportion to control current in coil winding, the reset force of reducing oil direction grew out of the reset spring, actuators swing arm make mechanical pump control handle of engine or carburetor motion to reduce speed deviation direction, so as to control the engine operate stable in set speed.
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electronic part , electronic parts , temperature controller , feed back , feed back system , feed back systems