Study on Premixed Combustion in a Diesel Engine with Ultra-multihole Nozzle

Table 6

Effect of swirl ratio on engine performance.

Operating condition	Swirl ratio	Injection pressure; MPa	Injection starting point °CA ATDC	EGR rate %	Soot g/kW·h	NOx g/kW·h	HC; g/kW·h	CO; g/kW·h	BSFC g/kW·h
B	2.8	80	3	15	0.0049	2.86	14.05	24.36	308.0
	3.6	110	−1.5	80	0.0012	1.49	5.08	20.03	274.8
	4.5	110	−2	40	0.0009	1.04	5.20	20.21	277.9
D	3.6	110	2	28	0.0402	2.48	0.53	10.15	253.4
	4.5	110	2	28	0.1081	2.69	0.62	11.86	269.8