Anglin, Donald L. Consultant, Automotive and Technical Writing, Charlottesville, Virginia.
Last reviewed:November 2019
- Diesel fuel injection
- Gasoline fuel injection
- Related Primary Literature
- Additional Reading
The pressurized delivery of a metered amount of fuel into the intake airflow or combustion chambers of an internal combustion engine. Metering of the fuel charge may be performed mechanically or electronically. In a diesel engine, the fuel is injected directly into the combustion chamber (direct injection) or into a smaller connected auxiliary chamber (indirect injection). In the spark-ignition engine, the fuel is injected into the air before it enters the combustion chamber by spraying the fuel into the airstream passing through the throttle body (throttle-body injection) or into the air flowing through the port to the intake valve (port injection). See also: Combustion chamber
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