Diesel Injectors – Video

How a diesel fuel injector works

diesel injectorsIn this video you will learn about

  • Different types of diesel injectors
  •  Needle valves and injector nozzle
  • How an injector nozzle fits into nozzle holder

How the nozzle produces an atomized spray of diesel fuel

Why opening pressure is so importnt

Why spring strength and use of shims will determine the pressure when the nozzle will open

How excess fuel is used to cool the injector and to lubricate it – excess fuel eventually runs back to fuel tank, through a leak-off line, to be used later.

That the different types of nozzles are

  • hole-type – commonly found in direct injection engines (piston has bowl design)
  • pintle – type used in indirect injection engines (ricardo in cylinder head)