What Is the Solonoid Valve on an Intake Manifold?

by Andrea Stein
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Cars rely on mechanical and electrical devices in order to run efficiently. Many of these parts play dual roles, or are electromechanical. A solenoid valve on the car’s intake manifold is an example of a crucial electromechanical device.


A solenoid valve is an electromechanical valve used to determine the flow of liquid or gas.


A solenoid valve on an intake manifold contains a wire coil, which carries electric currents. When a current runs through the coil, this creates a magnetic field, which causes an actuator located in the solenoid valve to shift. An actuator is a device used to turn the energy from the electric current into motion. The solenoid valve detects the activity from the actuator, and either opens or closes to allow access or block liquid or gas from flowing through.


Solenoid valves on intake manifolds can be open, closed or two-way. A closed solenoid valve blocks liquid or gas when a current is currently flowing through the valve. An open solenoid valve enables access to gas or liquid when a current runs through it. Two-way solenoid valves contain three ports, or openings--one inflow port, which allows in gas and liquid, and two outflow ports, which send the gas and liquid out. The outflow is switched back and forth between the two outflow openings.

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