EXPERIMENTAL MEASURES FOR MEETING STANDARDS OF DIESEL ENGINE VISIBLE EMISSIONS

Abstract

The paper presents research work done on a turbocharged inter-cooled direct injection diesel engine for the reduction of smoke emission. The engine type D2156MTN8R having a rated power of 280 HP at 2100 rpm, manufactured by Roman Truck Company, was tested on the dynamometric bench being measured performances and emissions. According to standards there were measured performance parameters such as corrected power,corrected torque, hourly fuel consumption,as well as emissions –in terms of smoke number expressed in Hartridge smoke units.The opacity of exhaust gas was compared to limits imposed by European Regulation ECE 24.Further experimental adjustments were done to correct smoke emissions at lower speeds,in four steps: variation of the inject ion timing, variation of fuel flow rate injected in the combustion chamber, axial rotation of the injector nozzles and variation of the injected fuel flow rate according to charged air pressure.