The Effect of Hard Particulate Wear on Diesel Injectors

Supplier: Donaldson Australasia
10 August, 2015

In order to produce cleaner, greener, more efficient engines, manufacturers have made dramatic advances in fuel injection technology.

These efforts have been successful, with modern engines burning significantly cleaner and producing much less air pollution than thoses of only a a few years ago. In addition, more dangerous emissions are now removed by exhaust after treatment devices. Success comes with a price; these new engines are extremely precise pieces of engineering and for proper functionality, require equally precise control of the fuel that is burned.

All engines benefit from clean fuel with extended component life and increased availability, but modern engines must have spotlessly clean fuel at all times. Poor handling practices or failure to pay vigilant attention to fuel cleanliness can otherwise hve catastrophic results.

Since the late 1990s, diesel engine fuel systems and equipment manufacturers along with filter manufacturers have cooperated in research efforts at Southwest Research Institute (SwRI) to determine the level of filtration required to protect fuel system components from hard particle damage. During the last 15 years, fuel injection technology has changed dramatically to meet rapidly evolving emissions requirements.

This document summaries the research used to identify filtration requirements and encompass two series of testing. The first series was completed in 2000 on traditional unit injectors, the second was completed in 2011 on the latest high pressure common rail (HPCR) systems introduced to the market to meet the new, more stringent emissions requirements.

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