the transit bus niche market for alternative fuels module 2 basics of in applications clean cities coordinator toolkit prepared by tiax llc irvine office december 2003 one park plaza 6th floor california 92614 949 833 7131 leonard jon tiaxllc com 1document code emission reduction approaches heavy duty vehicles strategies to reduce nox pm and toxics are implemented at 3 basic levels fuel exhaust egr after treatment urea water additives or electric power reductant platinum cerium d e s u l f r i a t o n g q processing engine design modifications alt hcci combustion chamber date using w minimal has been very effective other advanced af technology will provide even greater benefits 2document transportation introduction advantages non petroleum energy supply lessens dependency on foreign sources oil refined products insulates economy from price volatility chemically simple with high hydrogen carbon ratios methane
