Quasi-Dimensional Modelling and Parametric Studies of a Heavy-Duty HCCI Engine

Table 3

Performance parameters of HCCI mode simulation results with varying EGR condition and comparison with CI mode experimental values (Operating condition: 1400 rpm; 25% load; compression ratio:17.5; fuel quantity: 38.5 mg/stroke).

Mode	HCCI	HCCI	HCCI	HCCI	CI
EGR rate	0%	20%	40%	60%	20%
Power (kW)	19.4	23.44	27.6	29.4	24.6
Peak firing pressure (bar)	124.7	123.8	126.1	117.4	65.6
Peak pressure rise (bar/deg)	37.2	33.7	23.8	9.2	3.2
Combustion noise (dBA)	98.9	99.0	96.7	91.5	83.8
Specific fuel consumption (g/kW-h)	332.7	275.5	233.6	219.2	242.1