fuel injection

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun Any of several methods or mechanical systems by which a fuel is reduced to a fine spray and injected directly into the cylinders of an internal-combustion engine.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun the delivery, under pressure, of a metered amount of fuel, as a fine spray, into the intake airflow or combustion chambers of an internal combustion engine

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun mechanical system to inject atomized fuel directly into the cylinders of an internal-combustion engine; avoids the need for a carburetor