An animated cut-away diagram of a typical
fuel injector, which is used to spray controlled amounts of
petrol (gasoline) into an
internal combustion engine. A
solenoid is activated when fuel is intended to be delivered to the engine, causing the plunger to become pulled toward the solenoid by
magnetic force. This uncovers the valve opening, allowing fuel to flow into the
atomiser and out the spray tip. The route of fuel is shown in orange; grey/blue indicates no fuel present.
Image credit: WikipedianProlific