Originally Posted By: Claud
Originally Posted By: Olas
Originally Posted By: Claud
Originally Posted By: Olas
There is no reason to want to reduce NOX, it comes from cylinder pressure and cylinder temperature which are directly related to cylinder filling and torque.
Introducing nitric acid into the atmosphere strikes me as a good reason.
Claud
Then ride a bike everywhere, otherwise drop the holier-than-thou act. You drive a car, use electricity, buy stuff from multinationals, all of which are extremely damaging to the environment. A few ppm NOX with the consequence of better power, better torque and NOT having to clean carbon/soot from the inlet tract is more than worth it.
I'm not trying to be holier than thou, maybe I should just drop litter in the street and dump waste oil down a drain because I'm too lazy to make any effort to do anything other than act in my own short term self interest.
Claud.
Claud,
Nitrogen oxides quickly decompose to harmless components, i.e. N2 and O2. In the process, some of them do react with unburnt hydrocarbons to make smog, but only in large cities - not where Tired Trucker and I live. Smog itself has a very short "half life" - look at Beijing when they decide to get rid of the smog - it only takes a day or 2; and the planetary atmosphere as a whole isn't smoggy after decades of smog in big cities.
Like wise soot (basically pure carbon particles) settles to the ground and becomes part of the food (carbon) chain. Yes, soot from Indonesian forest fires spreads widely; do you think if diesel soot spread widely knowledge of it would be suppressed?
There IS one tailpipe emission that DOES persist in the atmosphere for a long time: CO2. Personally I think we are counteracting natural global cooling caused by the well known Milankovitch cycles (i.e. slowly sliding into the next ice age) but regardless of one's feelings about climate change I accept that man caused CO2 is superimposed on natural changes. And what do we do about CO2 emissions vis-a-vis IC engines in the short and medium term? BETTER FUEL MILEAGE!!!!
So considering where I live (no smog) should I feel guilty about "loosing" EGR and DPF (with its' fuel consuming regen cycles). Should Tired Trucker feel bad about buying a glider?
We are actually doing the atmosphere a favor, no kidding.
Like TT said, they should have gone with SCR/urea from the beginning. No EGR=less soot=less or no need for DPF/regens.
The Europeans did a much better job with Euro5 and 6 than the EPA. Subtle differences re NOx/soot ratios made a huge difference in emission strategies resulting in significantly better fuel economy in Euro spec vehicles vs EPA.
Charlie