What are three purposes of solenoid actuators?
What will be an ideal response?
Solenoid actuators are used for several things in electronically controlled systems:
- The emission system vapor canister uses a solenoid that opens to allow fumes to be purged from the canister when the engine is warm and above idle speed.
- Fuel injectors are solenoids whose pulse width is controlled by the computer.
- Engine idle is maintained using an idle speed control solenoid.
- Electronic transmissions use shift solenoids and a converter lockup solenoid.
- An engine with an air management system uses solenoids for controlling the direction of flow from the air pump.
- Older EGR vacuum control used two solenoids; one is used for vacuum actuation, and the other for bleeding off vacuum.
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