Abstract
Experimental research was conducted on a turbo-charged, inter-cooling and common-rail diesel engine with Fischer–Tropsch fuel synthesized from Coal-to-liquid (CTL), in order to investigate the influence of different injection parameters on the combustion, emissions and efficiency characteristics of the engine. The results showed that the ignition point was advanced, the in-cylinder pressure and heat release rate increased as the injection timing advanced and the injection pressure increased. By comparing the peak in-cylinder pressure of 100 cycles for one sample, it was found that the coefficient variation (COV) remained under 2% throughout the tests and the combustion process remained stable. NOx emissions decreased with delayed injection timing and lower injection pressure. In contrast to NOx emissions, soot emissions were almost zero when the injection pressure was up to 143.5 MPa. The indicated thermal efficiency (ITE) showed no obvious change with different injection parameters, and remained under 40% in all the tests.
Highlights
As one of the most important power sources of automobiles, diesel engines have played an irreplaceable role in the transportation industries due to their high thermal efficiency and good reliability
Hao et al studied the emissions of carbonyl compounds (CBCs) in a light-duty diesel engine fueled with CTL [23]
Previous research has mainly concentrated on the pure engine performance, and there are scarce reports about the effects of the injection parameters on combustion stability, the combustion process, emissions and the efficiency characteristics of a diesel engine fueled with CTL
Summary
As one of the most important power sources of automobiles, diesel engines have played an irreplaceable role in the transportation industries due to their high thermal efficiency and good reliability. The level of soot emissions and NOx emissions restricts the application prospects of diesel engines due to increasingly stricter emissions regulations and the strong demand for green travel. Researchers worldwide have made efforts to achieve progress in the field of diesel emission control via catalytic filters [1,2], and in the field of alternative fuel for diesel engines [3,4,5,6,7,8]. Yatish et al used the Taguchi method to improve the emissions and researched the optimization of emissions from diesel engines [9,10,11]. Coal-to-liquid (CTL) is a subsidiary product of the coal chemical industry that has been demonstrated to be a promising clean alternative fuel to diesel
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