Prediction of NO_x Emissions from a Direct Injection Diesel Engine Using Artificial Neural Network

Table 3

Measured NO_x emissions with respect to the three operating parameters.

OP^* and NOx	EN^**
	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Engine speed (RPM)	591	592	601	601	602	602	603	604	604	605	606	606	608	611	612	612	615	616	616	617	618	621	623	626	627	628	628	631	631	632
Intake air temperature (^°C)	25.5	25.1	23.4	28.3	27.6	17.3	16	20.5	17.3	20.4	15.9	28.1	23.8	21.5	22	24.7	25.3	20.8	20.9	22.5	20.8	27.1	23	22.8	15.9	15.9	26.1	26.6	26.5	23
Mass fuel (g/sec)	0.43	0.43	0.42	0.42	0.41	0.44	0.42	0.41	0.43	0.43	0.42	0.44	0.43	0.39	0.39	0.39	0.39	0.44	0.4	0.43	0.4	0.42	0.47	0.47	0.44	0.43	0.45	0.44	0.46	0.47
NOx (g/kw·hr)	18.96	19.97	21.56	29.01	47.71	18.69	19.42	24.49	21.51	24.09	18.54	29	22.75	21.42	18.26	20.73	20.18	19.13	24.05	25.23	20.45	31.56	22.53	21.64	27.95	24.88	28.74	37.91	28.23	15.14
OP^* and NOx	EN^**
	31	32	33	34	35	36	37	38	39	40	41	42	43	44	45	46	47	48	49	50	51	52	53	54	55	56	57	58	59	60
Engine speed (RPM)	632	633	636	638	640	645	1389	1391	1396	1396	1397	1398	1398	1399	1399	1399	1399	1400	1401	1401	1401	1401	1402	1402	1402	1402	1402	1403	1403	1403
Intake air temperature (^°C)	24.9	22.9	26.2	23.7	18.6	18.6	16	15.8	15.5	15.6	23.3	24.6	23.7	20.4	24.8	21.7	23.8	20	19.3	21.7	19.9	15.8	21.2	19.7	17.2	16.9	25.5	23.8	15.6	19.9
Mass fuel (g/sec)	0.4	0.46	0.44	0.41	0.48	0.49	1.53	1.54	1.48	1.48	2.24	2.34	3.65	6.7	2.33	2.19	2.24	6.72	2.21	2.3	5.03	1.5	6.51	5.02	4.88	491	6.63	0.82	2.2	3.54
NOx (g/kw·hr)	26.7	14.09	39.32	27.04	24.21	23.31	10.21	10.67	11.02	11.25	13.1	13.01	11.98	8.905	12.89	12.7	13.13	8.753	11.6	12.28	11.08	12.6	9.398	11.2	12.63	12.79	10.55	4.43	9.242	9.963
OP^* and NOx	EN^**
	61	62	63	64	65	66	67	68	69	70	71	72	73	74	75	76	77	78	79	80	81	82	83	84	85	86	87	88	89	90
Engine speed (RPM)	1403	1403	1403	1404	1404	1404	1404	1404	1404	1404	1404	1404	1405	1405	1405	1406	1406	1406	1406	1406	1406	1407	1407	1407	1407	1407	1407	1408	1408	1411
Intake air temperature (^°C)	18.9	20.1	25.5	19.6	21.1	15.6	18	15.4	15.4	24.6	17.7	16.7	24.3	15.8	18.3	24.2	15.7	17.5	15.7	16.5	21.6	24.6	15.4	26.9	21.7	17.7	18.6	21.2	18.1	21.4
Mass fuel (g/sec)	3.59	3.54	6.65	2.2	6.52	2.19	6.71	3.55	3.55	3.8	6.67	5.01	0.84	2.18	3.6	0.83	2.17	6.69	3.51	5.02	2.18	0.85	3.5	2.29	2.16	1.51	1.51	6.62	6.7	3.5
NOx (g/kw·hr)	10.23	9.972	10.54	9.466	9.346	9.469	9.565	10.37	10.61	12.51	10.64	12.39	4.055	9.401	10.28	3.935	9.863	10.5	11.05	12.11	12.39	4.105	10.75	12.47	12.53	15.88	16.68	8.118	9.605	11.73
OP^* and NOx	EN^**
	91	92	93	94	95	96	97	98	99	100	101	102	103	104	105	106	107	108	109	110	111	112	113	114	115	116	117	118	119	120
Engine speed (RPM)	1411	1412	1414	2001	2002	2005	2055	2104	2106	2148	2154	2194	2194	2195	2196	2196	2198	2200	2200	2200	2200	2200	2201	2201	2201	2201	2201	2201	2201	2203
Intake air temperature (^°C)	17.2	21.2	17.5	20.4	17.7	17.9	16.8	17.4	17.6	17.2	17.4	21.3	19.5	25.5	21.9	21.5	24.5	18.3	21	20.5	21	24.2	20.1	19.7	21.2	20.8	19.6	20.2	20.7	21.8
Mass fuel (g/sec)	1.53	3.49	1.54	9.11	9.28	9.21	9.42	9.65	9.59	9.91	9.83	5.64	10	10.04	5.7	8.05	8.34	10.11	10.15	7.5	8.03	8.36	7.66	7.78	7.56	3.85	10.02	9.98	10.03	10.24
NOx (g/kw·hr)	10	11.86	10.03	10.4	12.26	12.13	11.85	11.47	11.49	11.13	11.3	10.96	9.073	10.56	11.06	9.117	9.31	11.06	8.407	11.96	8.99	9.004	10.77	10.73	12.23	10.89	9.169	9.358	9.371	8.712
OP^* and NOx	EN^**
	121	122	123	124	125	126	127	128	129	130	131	132	133	134	135	136	137	138	139	140	141	142	143	144
Engine speed (RPM)	2203	2204	2204	2205	2205	2205	2205	2206	2207	2207	2207	2207	2207	2208	2210	2210	2211	2215	2250	2254	2303	2304	2305	2308
Intake air temperature (^°C)	23.7	20.7	18.5	19.9	20.8	17.3	21.5	20.2	21.8	22.1	21.7	24	24.4	20.9	17.9	24.1	20.8	21.2	19.9	20.5	18.6	18.8	16.4	17.2
Mass fuel (g/sec)	6.3	10.11	10.13	5.98	5.99	10.17	3.77	3.82	5.72	5.72	4.22	4.37	4.42	4.15	10.16	1	3.75	10.1	10.31	10.3	9.01	8.88	9.93	9.92
NOx (g/kw·hr)	8.91	11.64	11.12	9.21	9.354	10.32	12.94	10.67	11.54	11.15	11.55	9.57	9.538	11.11	10.8	5.885	11.83	11.9	11.06	11.41	8.095	7.305	9.631	10.19

^*Operating parameter, ^**experiment number.