10th Symposium "The Working Process of the Internal Combustion Engine"
Reduced Emissions by Variation of Design and Operating Parameters of Heavy Fuel Engines
Authors
Horst Rulfs, Arbeitsbereich Wärmekraftanlagen und Schiffsmaschinen, Technische Universität Hamburg-Harburg
Year
2005
Summary
Under the expectation of tighter NOx emission limits for marine engines different reduction methods can be applied. A combination of various operating and design parameters was investigated with a single-cylinder research engine 1L 32/40. Optimal fuel injection and lower charge air temperatures as well as increased compression ratios reduce the NOx emissions. Theoretical and experimental investigations of various Miller valve timings and valve overlaps demonstrated an interesting NOx reduction potential. An optimal combination results in NOx emissions of a four-stroke engine (750 rpm) of less than 8 g/kWh (E2 cycle). The two-stage turbocharging would offer even higher potentials.
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