The Effect of Biofuel on the Emission of Exhaust Gas from an Engine with the Common Rail System

The paper presents the results of experimental tests of a FIAT MultiJet 1.3 SDE 90 PS engine equipped with a common rail system, running at full load operation at rotational speeds of n = 1000 rpm, 1750 rpm, 2000 rpm, 2500 rpm, 3000 rpm, 3500 rpm, 4000 rpm and 4200 rpm, carried out on a dynamometer stand. During the tests, the engine was supplied with diesel oil and rape oil fatty acid methyl esters (FAME) in the following proportions: B20 (80% diesel oil and 20% FAME), B40 (60% diesel oil and 40% FAME), B60 (40% diesel oil and 60% FAME) and B80 (20% diesel oil and 80% FAME). This paper presents an assessment of the effect of the additions of rape oil fatty acid methyl esters to diesel oil on the unit fuel consumption and the emission of the following harmful exhaust gas components: nitrogen oxides, hydrocarbons, carbon monoxide, particulates and carbon dioxide. The fuel consumption was measured using a AVL 730 Dynamic Fuel Consumption fuel dosimeter. The measurements of the concentrations of the above-mentioned harmful exhaust gas components were performed using a MEXA-1600 DEGR analyser manufactured by Horiba, while particulate emissions were measured with a MEXA-1230PM analyser manufactured by Horiba.