I believe there are two emission issues with Diesels.
Particulates, that is now handled with DPF, which is PIA to me. I do not think a Diesel should smoke if you can keep the A/F ratio correct. It seems like the worst problem would be during acceleration before the turbo starts working. I can tell that my 2016 6.7l regens a lot less than my 2011 did, so will assume it produces less particulates. I can also tell a decrease in acceleration from my 2011, so would assume that they are not opening up the injectors as fast so the turbo can catch up a little.
I am seeing new active turbo technology that has combustion in the turbo to spin it up when the engine is not producing hot gasses, that is like having a blower along with the turbo. We use compressed air to spin turbo's up on the big compression engines so they can get enough air. Maybe a high pressure air tank could function like an accelerator pump on a carbureted gas engine to give it the needed shot. The tank could be refilled over a longer time once the engine catches up.
NOx, is now handled with EGR and SCR, I really doubt that will change to much, hope it goes more SCR and less EGR so economy comes up.
Maybe we can hold the standards where they are and reduce the troublesome pieces with new technology.
Comments invited.
Particulates, that is now handled with DPF, which is PIA to me. I do not think a Diesel should smoke if you can keep the A/F ratio correct. It seems like the worst problem would be during acceleration before the turbo starts working. I can tell that my 2016 6.7l regens a lot less than my 2011 did, so will assume it produces less particulates. I can also tell a decrease in acceleration from my 2011, so would assume that they are not opening up the injectors as fast so the turbo can catch up a little.
I am seeing new active turbo technology that has combustion in the turbo to spin it up when the engine is not producing hot gasses, that is like having a blower along with the turbo. We use compressed air to spin turbo's up on the big compression engines so they can get enough air. Maybe a high pressure air tank could function like an accelerator pump on a carbureted gas engine to give it the needed shot. The tank could be refilled over a longer time once the engine catches up.
NOx, is now handled with EGR and SCR, I really doubt that will change to much, hope it goes more SCR and less EGR so economy comes up.
Maybe we can hold the standards where they are and reduce the troublesome pieces with new technology.
Comments invited.