The Effect of DI Nozzle Fouling on Fuel Spray Characteristics

Paper #:
  • 922232

Published:
  • 1992-10-01
Citation:
Winterbone, D., Clough, E., Rao, K., Richards, P. et al., "The Effect of DI Nozzle Fouling on Fuel Spray Characteristics," SAE Technical Paper 922232, 1992, https://doi.org/10.4271/922232.
Pages:
12
Abstract:
The atomisation characteristics of DI diesel engine fuel injection nozzles have been the subject of intensive study over the last decade. Much of this work has been related to clean, single hole nozzles spraying into quiescent air, at either ambient conditions or elevated pressures and temperatures. Experience shows that fuel injector nozzles may foul very rapidly in field service, and that this might have a significant effect on the performance of the engine particularly with regard to emissions. The build up of material on the injector nozzle can be controlled by the addition of suitable fuel additives. This paper describes test procedures developed to assess deposit build up and to indicate the efficacy of keep clean additives. The paper then goes on to describe high speed photographic techniques for studying the fuel spray characteristics of clean and fouled injectors in a firing engine.
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