Optical characterisation of high pressure diesel fuel injectors

Abstract

The main combustion by-products of an automotive diesel engine are carbon-dioxide (CO2), particulate matter (PM) and oxides of nitrogen (NOx). Engine designers are challenged by the legal limits for PM and NOx reductions, especially as options are limited. Exhaust after- treatment devices are being used as a means to meet emission legislations. Another option, optimising the combustion process itself, has potential for improved efficiency as well as reducing the regulated emission species. Studies have confirmed this, by demonstrating that the in-cylinder flow conditions, which are driven by fuel spray and piston bowl interaction, are critical for the combustion event. Achieving emission reductions without compromising engine efficiency requires improved understanding of fuel/gas mixing and pollutant formation mechanisms. This improved understanding of the combustion system can be obtained through mechanical, electrical/electronic and optical techniques. Optical techniques are often preferred due to their non-intrusive nature.

Date of Award	Apr 2015
Original language	English
Awarding Institution	University of Brighton