OK, PLEASE no politics to keep this from getting locked
( https://www.bobistheoilguy.com/forums/ubbthreads.php/topics/4710915/ )
Engineers, please step in.....
I have argued (well... ranted, really) for years
that if we just stop focusing on emissions to such a strict degree...
and focus on FUEL MILEAGE solely, instead -
That we COULD get cars that meet the new CAFE requirements.
High swirl combustion chambers, variable valvetrain events, etc... these make engine more "efficient".
"Efficient" is good, because mileage and power both go up.
Bu then throw in EGR, catalytic converters (not so much now as in the past), and other devices focused on emissions only. The diesel trucks guys have it horrible - doing a regen on a DPF uses tons of extra fuel (and makes more co2) - just so there's less particulates?!?!? To heck with particulates, look at all the extra co2 you're making!
Rant off (for now) -
Q: how efficient can engines really be if we could just forget about emissions and focus on fuel economy instead?
( https://www.bobistheoilguy.com/forums/ubbthreads.php/topics/4710915/ )
Engineers, please step in.....
I have argued (well... ranted, really) for years
that if we just stop focusing on emissions to such a strict degree...
and focus on FUEL MILEAGE solely, instead -
That we COULD get cars that meet the new CAFE requirements.
High swirl combustion chambers, variable valvetrain events, etc... these make engine more "efficient".
"Efficient" is good, because mileage and power both go up.
Bu then throw in EGR, catalytic converters (not so much now as in the past), and other devices focused on emissions only. The diesel trucks guys have it horrible - doing a regen on a DPF uses tons of extra fuel (and makes more co2) - just so there's less particulates?!?!? To heck with particulates, look at all the extra co2 you're making!
Rant off (for now) -
Q: how efficient can engines really be if we could just forget about emissions and focus on fuel economy instead?