Investigation of real operation gaseous emissions from a diesel locomotive

Abstract

• The high BSFC at the idle operation decreases as the BMEP increases. • Highest BTE at the mid-BMEP, corresponding to 50% load condition. • Total amount of gaseous emissions increases as the BMEP increases. • Lowest brake specific gaseous emissions at the mid-BMEP. • Test mode including high emission-measured condition provides with low uncertainty. Many investigations on the fuel consumption and the emission characteristics of diesel engines for non-road mobile machinery (NRMM) have been carried out in the various conditions of steady-state and transient operation, and the knowledge obtained from these studies provides substantial information to analyze real operation emissions. Detailed information on the fuel efficiency and the emission under the real operation condition, however, is still needed to provide significant information to develop the advanced after-treatment system as well as to analyse the fuel efficiency and emissions from the NRMM operating real-world conditions. This study aims to investigate the fuel efficiency and the gaseous emissions from a diesel locomotive. The experiment was carried out with a Portable Emissions Measurement System (PEMS), and studies the fuel efficiency, the overall gaseous emissions, the association of gaseous emissions and brake mean effective pressure (BMEP), and the load conditions for the emission measurement.