The effect of the cetane number of various diesel-HVO fuel blends on the combustion process of a turbocharged diesel engine

Abstract

The paper presents effect of the cetane number and chemical-physical properties of diesel-HVO fuel blends oxygenated with ethanol (E) or biodiesel (B) on the autoignition delay, combustion phenomenon, maximum heat release rate, and the peak in-cylinder pressure of a turbocharged CRD1 diesel engine. Diesel-HVO fuel blends oxygenated with anhydrous (200 proof) ethanol OE1-OE3 or rapeseed biodiesel OBI-OB3 (4.5 wt% oxygen) in such proportions by mass to assure the variation within a wide range of the cetane (C) number 51.2-67.3 were tested for brake mean effective pressure of pt, = 1.24, 1.37 and 1.40 MPa at the respective speeds of 1500, 2000 and 2500 rpm. Analysis of the changes occurred in compression ignition delay, burn angles MBF 50 and MBF 90, maximum heat release rate and the peak in-cylinder pressure made by using oxygenated fuelfcblends OEI-OE3 or OB1-OB3 was performed on comparative bases with the corresponding values measured with blends CE1 or CB1 to reveal the potential developing trends of the combustion parameters.