Empirical study of the effect of the air filter on the performance and exhaust emissions of a diesel engine

Abstract

The results of an experimental study of the effect of the pressure drop of the air filter pf on the operat-ing parameters and exhaust emissions of a modern CI internal combustion engine of a truck equipped with an electronically controlled power system are presented. The tests were carried out for an air filter with a clean filter cartridge Δpf0 = 0,58 kPa and with a cartridge contaminated after a service mileage (about 50 thousand km) ΔpfD = 2,024 kPa. In each test, engine performance, exhaust emissions and relative change in emissions were determined: CO, NOx, HC, CO2, H2O. It was found that an increase in the filter resistance pf causes a decrease in the filling degree by 12%, engine useful power by almost 10%, exhaust gas temperature by a maximum of 30oC and an increase in specific fuel consumption by almost 5%. Air filter resistance has no significant effect on NOx emissions and HC concentration. There is a reduction in H2O emissions by up to 7%, CO by up to 13% and CO2 by up to 4%, and an increase in oxygen emissions by 15%, depending on operating conditions.

Effect of DMC blend ratio on emission characteristics for diesel engine generator fueled with DMC/diesel blended fuel

“…It is imperative to seek solutions for reducing consumption of traditional fossil fuel and emission for diesel engines [11]. In response to these challenges, diesel engines have adapted many technical solutions like the innovation of injection method or the application of alcohol fuel to meet both the strict emission regulation and the depletion problems of fossil fuel resources [3,5], like using higher injection pressure [12], the HEUI fuel injection system [9], the HCCI diesel engines [22], also the adaption of air filter to reduce the HC and CO emission [7]. many efforts about engine with alternative fuel and adaption on engine have been made.…”