Quote:
Originally Posted by martins91
Could someone explain which one is solenoid and which one is actuator?
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In that picture, 1 is a solenoid and 2 looks like one also.
Solenoid is a general term for a part which uses electromagnetism so for example, a starter motor solenoid uses electromagnetism to move a steel cylinder to bridge the high current contacts to the main starter motor. Relays can be solenoids too.
In the case of a boost solenoid, electromagnetism is used to control an internal rod in order to regulate air/vacuum flow to another component.
A boost solenoid will then be connected to an actuator which in turn moves to control boost levels.
"Boost" solenoids are also used on some cars to control non boost related actuators like an EGR actuator for example.