DEER 2008, Dearborn MI, 4-7° August 2008 1 14th Diesel Engine 14th Diesel Engine- Efficiency and Emissions Research (DEER) Efficiency and Emissions Research (DEER) Conference Conference Carlo Beatrice and Chiara Guido Carlo Beatrice and Chiara Guido Istituto Motori, Consiglio Nazionale delle Ricerche Istituto Motori, Consiglio Nazionale delle Ricerche Naples Naples , ITALY , ITALY Contacts Contacts: c.beatrice@im.cnr.it c.beatrice@im.cnr.it c.guido@im.cnr.it c.guido@im.cnr.it Benefits and drawbacks of compression ratio Benefits and drawbacks of compression ratio reduction in PCCI combustion application in an reduction in PCCI combustion application in an advanced LD diesel engine advanced LD diesel engine