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Electronic Fuel Injection Components

Terms in this set (13)

Fuel Tank
Fuel Holding container from which fuel pump pulls fuel for the EFI
Engine Control Unit (ECU)
Microprocessor that monitors sensors in the EFI
Fuel Filter
removes particulates in the fuel to prevent damage to components
Fuel Pump
provides high fuel pressures for EFI systems; some models utilize
dual fuel pumps; once mechanical and one pulse pump to draw fuel from the tank
and deliver it to the high pressure fuel pump module
Fuel Return line
Line that provides for unused fuel to be returned to the fuel tank
Fuel pressure regulator
controls the fuel pressure for the injectors and returns
excess fuel to the tank
Ignition Module
Controls the timing of the ignition spark to the spark plugs
Throttle position Sensor (TPS)
Sensor that electronically identifies how much fuel is needed based on the far the foot pedal has been depressed.
Manifold Absolute Pressure (MAP) sensor
Measures mass air flow and determines amount of fuel to send to each injector
Oxygen sensor
Determines how much oxygen is in the exhaust of an engine and makes adjustments to fuel to injectors.
Fuel injector
atomize the fuel into a mist for better combustion
Intake Air Temperature (IAT) Sensor
Determines the density of the intake air into an engine and adjusts air to fuel rations injected into the cylinder through the injectors.
Crankshaft Position Sensor
determines rotation speed of the engine and adjusts fuel accordingly to match the Throttle position demand
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