Hyundai Elantra AD Quiz
Engine Control System/Fuel System

Description and Operation - Injector

In this manual: Engine Control System/Fuel System
General Information — 9Engine Mechanical System — 84Engine Electrical System — 60Emission Control System — 24Engine Control System/Fuel System — 90Automatic Transmission — 92Drive Shaft and Axle — 20Suspension System — 31Steering — 20Restraints — 50Brake System — 63Body (Interior and Exterior) — 214Body Electrical System — 221Heating, Ventilation, and Air Conditioning — 71
~1min read

Description

Based on information from various sensors, the ECM calculates the amount of fuel to be injected. The fuel injector is a solenoid valve, and the amount of injected fuel is controlled by the injection duration. The ECM controls each injector by grounding its control circuit. When the ECM supplies power to the injector by grounding the control circuit, the circuit voltage should be low (theoretically 0 V) and fuel is injected. When the ECM de-energizes the injector by opening the control circuit, the fuel injector closes and the circuit voltage should briefly reach a peak.

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