A chemical and morphological study of diesel injector nozzle deposits - insights into their formation and growth mechanisms

Rounthwaite, N
McGilvery, CM
Jiang, J
Williams, R
Giuliani, F
Britton, TB

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Publication date

March 2017

DOI

10.4271/2017-01-0798

Publisher

SAE International

ISSN

1946-3960

Journal

SAE International Journal of Fuels and Lubricants

Citation count (estimate)

Abstract

Modern diesel passenger car technology continues to develop rapidly in response to demanding emissions, performance, refinement, cost and fuel efficiency requirements. This has included the implementation of high pressure common rail fuel systems employing high precision injectors with complex injection strategies, higher hydraulic efficiency injector nozzles and in some cases <100µm nozzle hole diameters. With the trend towards lower diameter diesel injector nozzle holes and reduced cleaning through cavitation with higher hydraulic efficiency nozzles, it is increasingly important to focus on understanding the mechanism of diesel injector nozzle deposit formation and growth. In this study such deposits were analysed by cross-sectioning the ...