Homogeneous Charge Compression Ignition (HCCI): A New Concept for Near Zero NOx and Particulate Matter (PM) from Diesel Engine Combustion

Homogeneous charge compression ignition (HCCI) combustion of diesel fuel with external mixture formation

“…8 shows the variation of hydrocarbon emission with load. In HCCI mode, the HC and CO emissions are typically around 30 times higher than the standard diesel operation [22][23][24][25][26][27]. The hydrocarbon emissions are 0.51 g/kWh, 0.59 g/kWh, 0.69 g/kWh and 0.81 g/kWh at 75% load condition for diesel vapour induction with 0%, 10%, 20%, and 30% EGR whereas in conventional diesel operation it is about 0.25 g/kWh.…”

“…It resulted in gradual heat release beginning at 10 CA bTDC and extending upto 20 CA aTDC. The main combustion occurred after the second injection (20)(21)(22)(23)(24)(25), which significantly improved the combustion efficiency. HC emissions were from about 5000 ppm to below 2000 ppm and CO emissions were also high.…”

Experimental investigations on a hydrogen diesel homogeneous charge compression ignition engine with exhaust gas recirculation

“…Further, the heat release rates and hence the rates of pressure rise and peak pressures become too high at high loads i.e. when the mixture becomes relatively rich [11]. On the whole, achieving stable combustion with heat being released at the correct region of the engine cycle is a very difficult task in the HCCI engine.…”

Numerical study of effects of the intermediates and initial conditions on flame propagation in a real homogeneous charge compression ignition engine

“…The homogeneous charge compression ignition (HCCI) engine, combining the advantages of both spark-ignition (SI) engine and compression-ignition (CI) engine, is a promising approach to achieve high-efficiency and low-emissions simultaneously [1][2][3][4][5]. The homogeneous charge compression ignition (HCCI) engine, combining the advantages of both spark-ignition (SI) engine and compression-ignition (CI) engine, is a promising approach to achieve high-efficiency and low-emissions simultaneously [1][2][3][4][5].…”