Exhaust particle size distributions of a non-road diesel engine in an endurance test
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Kuupäev
2018
Kättesaadavus
Autorid
Ajakirja pealkiri
Ajakirja ISSN
Köite pealkiri
Kirjastaja
Abstrakt
The main objective of this study was to find out how th
e non
-
road diesel engine running
period of 500 hours affects the exhaust particle size distribution. By means of an engine exhaust
particle sizer (EEPS), particle number was measured before the endurance test and after 250 and
500 hours of engine operation
. The size distributions were determined at full and 75% loads both
at rated and at intermediate speeds. The soot, gaseous emissions and the basic engine performance
were also determined and lubricating oil was analysed a few times during the running perio
d.
A blend of low
-
sulphur fossil diesel and soybean methyl ester (B20) was used as fuel in the
4
-
cylinder, turbocharged, intercooled engine which was equipped with a diesel oxidation catalyst
(DOC) and a selective catalytic reduction (SCR) system. All em
issions were measured
downstream the catalysts. During the 500 hours of operation, the particle number increased
considerably within an approximate size range of 7 to 30
nm
. Between the initial and final
measurements, no notable differences were observed i
n the particle number emissions within a
particle size range of 50 to 200
nm
. The copper content of lubricating oil also increased
significantly during the 500 hours’ experiment. One possible reason for the substantial increase
in the nucleation mode parti
cle number was assumed to be copper, which is one of the metallic
elements originating from engine wear. The engine efficiency was almost equal, and the
differences both in smoke and hydrocarbon emission were negligible throughout the 500 hours’
experiment.
Kirjeldus
Article
Märksõnad
particle number, exhaust aftertreatment, B20, blend fuel, soybean methyl ester, articles