Table 3.

Orthogonal test scheme and results of orthogonal experiment.

Exp	A	B	C	D	ISFC	CO	NOx	SOOT
1	292	−6	12	330	265.25	240.9	2.02	0.455
2	292	−5	13	340	286.79	284.9	1.48	0.656
3	292	−4	14	350	307.46	296.7	0.95	0.763
4	292	−3	15	360	341.73	315.8	0.60	0.596
5	302	−6	13	350	279.95	285.0	2.50	1.051
6	302	−5	12	360	272.75	268.8	2.51	0.700
7	302	−4	15	330	314.27	314.8	1.38	1.510
8	302	−3	14	340	321.36	333.7	1.06	1.161
9	312	−6	14	360	288.63	316.1	2.96	1.304
10	312	−5	15	350	298.67	340.5	2.58	1.532
11	312	−4	12	340	286.60	298.7	2.44	0.915
12	312	−3	13	330	311.36	344.8	1.86	1.233
13	322	−6	15	340	299.99	338.3	2.93	1.551
14	322	−5	14	330	304.36	354.4	2.92	1.524
15	322	−4	13	360	296.60	326.1	3.12	1.117
16	322	−3	12	350	292.70	306.3	2.56	0.887