Ford's answers to the NHTSA 6.7 Investigation

BenK wrote:


Say go back to the older pump and it's lower BAR, which according to most say
never had or never heard of the kinds of problems with the current HPFP

Then to address the emissions, of which this current setup is designed to meet

Anyone know of other methods to clean up the exhaust besides filters, uera,
after burners, etc? Suspect the vehicle OEMs chose the cheapest, not necessarily
the 'best', right?

There is an interplay between high injection pressure (finer spray droplets) and lower particulates, lower unburnt Hydrocarbons, and with that --- smaller DPFs, SCR / DOC needed to clean it up at the tail end.

I have a Bosch paper that discuss the tradeoff, and how they are stacking the deck in favor of pressure to lower cost in the tail end.