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原文传递 Octane Requirement Increase of 1988 and 1989 Model Vehicles

题名：	Octane Requirement Increase of 1988 and 1989 Model Vehicles
关键词：	octa；crea；ncre；ease；model；emission；standards；announce；contin；change
摘要：	The need to study octane requirement increase (ORI) with unleaded gasolines became evident in 1970 when manufacturers announced that future cars would require catalytic converters to meet 1975 emissions standards and these vehicles would use an unleaded fuel of at least 91 RON. The Coordinating Research Council, INC. (CRC) initiated a series of ORI programs in 1971 to study the effects of these vehicle, fuel, and emissions changes. Since that time, manufacturers have made many engine and vehicle changes to meet both emissions and fuel economy standards. Because of these continuing changes and the exclusive use of unleaded gasoline in new vehicles, the ORI programs have been discontinued. The ORI data from 1971 and 1973 through 1984 models have been reported in previous CRC publications. CRC sponsored a Society of Automotive Engineers (SAE) paper which reported 1985-1988 model data.
报告类型：	科技报告