The effects of fuel properties on the emissions of a production vehicle with a gasoline direct injection engine operating over the Federal Test Procedure (FTP) cycle were investigated. The vehicle used was a 1998 Toyota Corona passenger car with a direct injection spark ignition (DISI) engine. Engine-out and tailpipe FTP emissions for six fuels and a California Phase 2 RFG reference fuel are presented. Four of the test fuels were blended from refinery components to meet specified distillation profiles. The remaining test fuels were iso-octane and toluene, an iso-alkane and an aromatic with essentially the same boiling point (at atmospheric pressure) that is near the T50 point for the blended fuels. Statistically significant effects, at the 95% confidence level, of the fuels on tailpipe emissions were found. Correlations were sought between the properties of the five blends and the Emissions Indices for engine-out hydrocarbons and NOx and for tailpipe particulates. Correlations were also investigated for relationships between fuel properties and the efficiency of the oxidation catalyst and of the lean NOx trap/catalyst. The correlations identified are discussed.
Effects of Fuel Parameters on FTP Emissions of a 1998 Toyota with a Direct Injection Spark Ignition Engine
Sae Technical Papers
CEC/SAE Spring Fuels & Lubricants Meeting & Exposition ; 2000
2000-06-19
Aufsatz (Konferenz)
Englisch
Emissions and Fuel Economy of a 1998 Toyota with a Direct Injection Spark Ignition Engine
SAE Technical Papers | 1999
|Emissions and fuel economy of a 1998 Toyota with a direct injection spark ignition engine
Kraftfahrwesen | 1999
|SAE Technical Papers | 2000
|