4 ms·
The are optimizing for minimizing NOx, CO, unburnt hydrocarbons, and particulate matter. The timing of engines cannot be advanced so much to have high temperatu
by cwaffles 3y ago
The are optimizing for minimizing NOx, CO, unburnt hydrocarbons, and particulate matter. The timing of engines cannot be advanced so much to have high temperature burns which allows for NOx creation. See page 13 of https://nepis.epa.gov/Exe/ZyPDF.cgi/91010CTV.PDF?Dockey=91010CTV.PDF https://nepis.epa.gov/Exe/ZyPDF.cgi/91010CTV.PDF?Dockey=9101...