fuel injection

fuel injection
—fuel-injection, adj.
the spraying of liquid fuel into the cylinders or combustion chambers of an engine.
[1895-1900]

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In an internal-combustion engine, introduction of fuel into the cylinders by a pump rather than by the suction created by the movement of the pistons (see piston and cylinder).

On diesel engines, which lack spark plugs, the heat created by compressing air in the cylinders ignites the fuel, which has been pumped in as a spray. In engines with spark ignition, fuel-injection pumps are often used instead of conventional carburetors. Fuel injection distributes the fuel more evenly to the cylinders than does a carburetor; more power can be developed and undesirable emissions are reduced. In engines with continuous combustion, such as gas turbines and liquid-fueled rockets, which have no pistons to create suction, fuel-injection systems are necessary.

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▪ engineering technology
      in an internal-combustion engine, introduction of fuel into the cylinders by means of a pump rather than by the suction created by the movement of the pistons. Diesel engines (diesel engine) do not use spark plugs to ignite the fuel that is sprayed, or injected, directly into the cylinders, instead relying on the heat created by compressing air in the cylinders to ignite the fuel. In engines with spark ignition, fuel-injection pumps are often used instead of conventional carburetors. Fuel injection into a chamber upstream from the cylinders distributes the fuel more evenly to the individual cylinders than does a carburetor system; more power can be developed and undesirable emissions are reduced. In engines with continuous combustion, such as gas turbines (gas-turbine engine) and liquid-fueled rockets, which have no pistons to create a pumping action, fuel-injection systems are necessary.

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Universalium. 2010.

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