Research Article
Experimental Investigation on Impact of EGR Configuration on Exhaust Emissions in Optimized PCCI-DI Diesel Engine
Table 5
L9 (34) Factors and responses in the orthogonal array test matrix.
| Run no. | Coded Input Parameters | Responses | A | B | C | D | Injection timing (CA BTDC) | EGR rate (%) | Dieseline ratio (D : G) (% by vol.) | Load (%) | Code | Actual | Code | Actual | Code | Actual | Code | Actual | NOx in g/kWh | HC in g/kWh | CO in g/kWh | Smoke in/m |
| 1 | −1 | 23 | −1 | 25 | −1 | 60 | −1 | 25 | 2.73 | 153 | 0.06 | 0.05 | 2 | −1 | 23 | 0 | 35 | 0 | 80 | 0 | 50 | 2.10 | 157 | 0.05 | 0.03 | 3 | −1 | 23 | 1 | 45 | 1 | 90 | 1 | 75 | 1.58 | 176 | 0.08 | 0.04 | 4 | 0 | 25 | −1 | 25 | 0 | 80 | 1 | 75 | 3.92 | 154 | 0.07 | 0.42 | 5 | 0 | 25 | 0 | 35 | 1 | 90 | −1 | 25 | 3.15 | 173 | 0.06 | 0.12 | 6 | 0 | 25 | 1 | 45 | −1 | 60 | 0 | 50 | 2.03 | 158 | 0.09 | 0.06 | 7 | 1 | 30 | −1 | 25 | 1 | 90 | 0 | 50 | 2.69 | 156 | 0.03 | 0.03 | 8 | 1 | 30 | 0 | 35 | −1 | 60 | 1 | 75 | 3.68 | 133 | 0.04 | 0.04 | 9 | 1 | 30 | 1 | 45 | 0 | 80 | −1 | 25 | 2.53 | 139 | 0.05 | 0.02 |
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