Fuel Equivalence Ratio and EGR Impact on Premixed Combustion Rate and Emission Output, on a Heavy-Duty Diesel Engine.
Paper in proceedings, 2005
This study aims to show how both NOx and soot are
affected by EGR dilution when constant, as well as
variations in equivalence ratio is applied together with
multiple injection strategies.
Experiments were conducted in a single cylinder heavy
duty research engine. The effects of both EGR and
equivalence ratio on partly premixed combustion were
investigated. Multiple injections strategies were
combined with high EGR levels and lean mixtures.
Multiple injections were used to control the combustion
phasing and the level of the premixed combustion rate.
The diesel combustion conditioning by means of
premixed combustion rate, EGR level and oxidant
equivalence ratio, leads to low engine emissions. In the
load range and configuration tested, emission levels
below future emission standards e.g. EURO V have
been shown, with no BSFC penalty or exhaust