Fuel Injection & Engine Management

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Fuel Injection Engine Management
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Fuel injection

• Fuel injection is a system within the engines of
  vehicles that forces fuel directly into the a
  part of the engine wherever it's burned.
• For the engine to run smoothly and efficiently it
  needs to be provided with the right quantity
  of fuel/air mixture according to its wide range
  of demands.
• Eventually the fuel/air mixture is controlled by
  the carburettor, an instrument that is by no
  means perfect.

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Types of fuel injector

• There are 2 types of fuel injector system.
• mechanically controlled
• electronically controlled.

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• In a mechanical system, the injector
  is spring-loaded into the closed position and is
  opened by fuel pressure.
• In electronic system is also held closed by a
  spring, but is opened by an electromagnet built
  into the injector body. The electronic control
  unit determines how long the injector stays open.

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Engine Management

• Modern engine management systems do a fine job of
  ensuring that engines run cleanly and efficiently
  in a wide variety of conditions, they are for the
  most part reliable and require little or no
  maintenance.
• An EMS is a self contained custom built computer
  which controls the running of an engine by
  monitoring the engine speed, load and temperature
  and providing the ignition spark at the right
  time for the prevailing conditions and metering
  the fuel to the engine in the exact quantity
  required.

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• The management system of a car can be its most
  complex system, and also its most problematic
  system. The management systems job is to monitor
  many different engine conditions and report this
  information back to the PCM. The PCM will then
  use this information to make decisions based on
  these inputs and command the appropriate response
  from various actuators.

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Thank you