Performance Evaluation of a Low-Grade Low-Heat-Rejection Diesel Engine with Crude Pongamia oil

Table 6

The Variation of No_x Levels at The Peak Load With The Injection Timing and Injection Pressure in The Conventional and LHR Engines at different Operating Conditions of The Vegetable Oil.

		NOx levels (ppm)
Injection timing (°b TDC)	Test fuel	Conventional engine						LHR engine
		Injection pressure (bars)						Injection pressure (bars)
		190		230		270		190		230		270
		NT	PT	NT	PT	NT	PT	NT	PT	NT	PT	NT	PT
27	DF	850	—	810	—	770	—	1300	—	1280	—	1260	—
	CPO	740	700	700	660	660	620	1265	1250	1235	1220	1200	1185
29	DF	900	—	860	—	820	—
	CPO	760	720	725	680	680	640	1190	1170	1170	1140	1140	1120
30	DF	935	—	900	—	860	—	1225	—	1205	—	1185	—
	CPO	790	750	750	710	710	670	1240	1210	1210	1190	1190	1160
31	DF	1020	—	980	—	940	—	1150	—	1130	—	1110	—
	CPO	840	810	810	770	770	730	—	—	—	—	—	—
32	DF	1105	—	1060	—	1020	—	—	—	—	—	—	—
	CPO	1000	980	960	920	920	880	—	—	—	—	—	—
33	DF	1190	—	1150	—	1110	—	—	—	—	—	—	—

DF: diesel fuel, CPO: crude pongamia oil, NT: normal or room temperature, PT: preheat temperature.