Quote:
Originally Posted by vtec-e
I did read somewhere that water mist injection would lower combustion temps and therefore NOx.
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probably and it is true. Water injection has been successfully used on car ferries and large stationary diesel generators as a NOx pollution control. As a side effect maximum power and fuel efficiency goes up slightly. Note usually when used for pollution control water injection is not tuned to to improve power or fuel economy but is tuned for the maximum practical NOx control.