| 摘要 |
A method of reducing emissions from a diesel engine including the steps o f providing an injector to an exhaust outlet of the diesel engine, the injec tor having an orifice with a diameter of about 0.006 inch or less, providing a reagent to the injector at an inlet pressure between about 120 psi and ab out 60 psi, actuating the injector on and off at a frequency between about 1 0 Hz and about 1 Hz with an on-time of about 1 % or more, injecting the reag ent via the orifice into the exhaust outlet at an injection rate, and wherei n varying of at least two of the inlet pressure, the frequency, and the on-t ime achieves a turn-down ratio of a maximum injection rate to a minimum inje ction rate of at least about 31 :1.
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