Research on the combustion process in the Fiat 1.3 Multijet engine fueled with rapeseed methyl esters

Abstract

The aim of the paper is to analyze and evaluate the basic parameters of the combustion process in a modern Fiat 1.3 Multijet diesel engine, fuelled esters (FAME) and diesel oil. During the tests on an engine test bed, the pressure waveforms in the cylinder were measured, on the basis of which the averaged actual indicator graphs were established in the determined engine operating conditions. On their basis, the pressure increase rates were determined and heat release characteristics were prepared based on the equation of the first principle of thermodynamics. The characteristics of the relative amount of heat released and the characteristics of the relative heat release rate were determined. The use of rapeseed methyl esters to supply the engine had an impact on the parameters of the combustion process as compared to its supply with diesel oil. Differences in the waveforms of heat release characteristics of the engine powered by the tested fuels are significantly greater at low loads. At the lowest engine loads, esters burn much faster than diesel oil. With the increase in engine load, the differences in the waveform of heat release characteristics during combustion of these fuels were significantly smaller.

Low-Temperature Combustion in Diesel Engines

“…Shortened ignition time registered for with FAME blend obtained between 10 and 60 Nm with 5, 10, and 50% FAME composition. A significantly higher HRRs with p m ax wave recorded between only in the range 10-40 Nm and otherwise the same trend for crank rotation [12].…”

“…The technical report on experimental and analytical evaluation of combustion process parameters on FIAT 1.3 multijet SDE 90 HP engine equipped with Common Rail fuel supply system and electronically controlled solenoid injectors used rapeseed biodiesel or fatty acid methyl ester (FAME) and diesel oil Kierce University of Technology led by Dariusz et al [12] to investigate the maximum combustion phenomena and reported that FAME exhibited slight P max than diesel oil at lower and medium loads despite the superior values at the first two subsequent stages of the maximum combustion [18].…”

“…Smart measurement systems are used to measure fast-changing values, with smart data acquisition system piezoelectric pressure transducer inside the cylinder and tensometric pressure sensor in the injection lines. The test was conducted in various configurations of load 10 À 60Nm and fuel composition of 5, 10, and 50% fuel dose with crankshaft rotation of 5, 10, 50, and 90% [12].…”

Current Status of Jet Engines and Their Future on Fuel Efficiency

“…The structure of a ramjet engine is shown as figure 7 below. Owing to the removal of moving parts, ramjet engine is considered as the simplest type of jet engine [13]. In addition, the most efficient velocity for the ramjet engine is around 3 Mach, and the maximum velocity is 6 Mach [13].…”

“…Owing to the removal of moving parts, ramjet engine is considered as the simplest type of jet engine [13]. In addition, the most efficient velocity for the ramjet engine is around 3 Mach, and the maximum velocity is 6 Mach [13]. However, it is impossible for a ramjet engine operate independently because of disappearing compressor and turbine [12].…”