Advanced Diesel Combustion Using of Wide Range, High Boosted and Cooled EGR System by Single Cylinder Engine

A chemical kinetically based ignition delay correlation for iso-octane covering a wide range of conditions including the NTC region

“…With many of these alternative schemes combustion chemistry is extremely important. Future designs are expected to employ such novel lean/dilute regimes, sometimes in combination with conventional SI and CI operation, where high boost (inlet pressures up to 5-6 bar) and/or extreme compression ratio (CR to 50:1) could be used to address power density and energy loss issues [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20]. In these engines ignition pressures could reach 100-300 bar, which is substantially higher than in current production engines where 0010 peak pressures are generally limited to ∼200 bar.…”

Effects of Compression Ratio and Simulated EGR on Combustion Characteristics and Exhaust Emissions of a Diesel PCCI Engine

“…EGR has been noted in the literature to improve IMEP and to extend the ignition delay [24,27]. In conventional diesel combustion, it has been used to control emissions of NO x through charge dilution and lowering the adiabatic flame temperature.…”

“…Under such cases, high levels of EGR coupled with low compression ratios are used to ensure sufficient air-fuel mixing time, leading to suppression of NO x formation and better combustion phasing. Thus, to achieve low soot and NO x simultaneously under moderately early injection timing it is necessary to optimize the injection pressure, EGR rate, compression ratio, and injection timing [24][25][26][27]. Like HCCI, PCCI is prone to high HC and CO emission and a high pressure-rise rate, which results in high combustion noise; additionally, it cannot be used at higher engine loads.…”

Effects of ethyl tert-butyl ether addition to diesel fuel on characteristics of combustion and exhaust emissions of diesel engines

“…Nevertheless, the problem of too high maximum rate of pressure rise (combustion noise) 27 is incurred with relatively low EGR rates at higher loads when using the ETBE blended fuel. 1 Therefore, other strategies, for example, multiple fuel injections [9] and boosting the intake pressure 2 [25], should be adopted and further researches are needed to address these issues when using ETBE 3 blended diesel fuels at higher load operations. 4 Figure 10 shows the effect of 30% ETBE addition to diesel fuel on THC and unregulated toxic 6 emissions including formaldehyde (HCHO), acetaldehyde (CH 3 CHO), 1,3-butadiene (1,3-C 4 H 6 ), 7 benzene (C 6 H 6 ), and toluene (C 7 H 8 ).…”