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Fuel-Injection Systems

 Fuel-Injection Systems

  • The fuel-injection system has many advantages over a conventional carburetor system.
  •  There is less danger of induction system icing, since the drop in temperature due to fuel vaporization takes place in or near the cylinder.
  • Acceleration is also improved because of the positive action of the injection system.
  •  In addition, fuel injection improves fuel distribution. This reduces the overheating of individual
  • cylinders often caused by variation in mixture due to uneven distribution.
  • The fuel-injection system also gives better fuel economy than a system in which the mixture to most cylinders must be richer than necessary so that the cylinder with the leanest mixture operates properly.
  • Fuel-injection systems vary in their details of construction, arrangement, and operation. The Bendix and Continental fuel-injection systems are discussed in this section.
  • They are described to provide an understanding of the operating principles involved. For the specific details of any one system, consult the manufacturer’s instructions for the equipment involved.
  • Bendix/Precision Fuel-Injection System
  • The Bendix inline stem-type regulator injection system (RSA) series consists of an injector, flow divider, and fuel discharge nozzle.
  •  It is a continuous-flow system which measures engine air consumption and uses airflow forces to
  • control fuel flow to the engine.
  •  The fuel distribution system to the individual cylinders is obtained by the use of a fuel
  • flow divider and air bleed nozzles.

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