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Wargo, John, Children’s Exposure to Diesel Exhaust on School Buses, North Haven, CT: Environment and Human Health, Inc. 2002).
2002 and high sulfur fuel is history. IMO 2007 and up compression ignition engines are efficient and clean. In order for spark ignition engines to survive their inherit inefficiencies, we need to get the flex-fuel engines designed with the direct cylinder injection, so we can get the compression up there where it needs to be. Then spark engines can be fuel controlled instead of air controlled. IMHO the pure spark ignition engine as we know it, is history. Just as the pre '07 compression engine is history. Compression engines will become more like the spark with fewer emissions and the spark engine will become more like the compression engine with better efficiency. And they all might be able to burn the same fuel. So its not us and them its we.
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