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.

Look at other dictionaries:

  • fuel injection — Injection In*jec tion, n. [L. injectio : cf. F. injection.] 1. The act of injecting or throwing in; applied particularly to the forcible insertion of a liquid or gas, by means of a syringe, pump, etc. [1913 Webster] 2. That which is injected;… …   The Collaborative International Dictionary of English

  • fuel injection — n. 1. a system in which a fine spray of fuel is injected directly into each combustion chamber of an engine 2. such injection of fuel fuel injected adj …   English World dictionary

  • fuel injection — ► NOUN ▪ the direct introduction of fuel under pressure into the combustion units of an internal combustion engine. DERIVATIVES fuel injected adjective …   English terms dictionary

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  • fuel injection — (FI) A fuel system that uses no carburetor but sprays fuel either directly into the cylinders or into the intake manifold just ahead of the cylinders. It uses an electronic sensing device to deliver the correct amount into the combustion chamber …   Dictionary of automotive terms

  • fuel injection — noun mechanical system to inject atomized fuel directly into the cylinders of an internal combustion engine; avoids the need for a carburetor • Syn: ↑fuel injection system • Hypernyms: ↑mechanical system * * * ˈfuel injection [fuel injection] …   Useful english dictionary

  • Fuel injection —   A fuel delivery system whereby gasoline is pumped to one or more fuel injectors under high pressure. The fuel injectors are valves that, at the appropriate times, open to allow fuel to be sprayed or atomized into a throttle bore or into the… …   Energy terms

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  • fuel injection — N UNCOUNT Fuel injection is a system in the engines of some vehicles which forces fuel directly into the part of the engine where it is burned …   English dictionary

  • fuel injection — fuel in.jection n [U] a method of putting liquid fuel directly into an engine, which allows a car to ↑accelerate more quickly …   Dictionary of contemporary English


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