The exhaust emissions from a gasoline direct injection (GDI) engine were sampled using the bottle in bag method and analysed using gas chromatography/mass spectrometry (GC/MS). The GDI engine was run two times using two specially mixed fuels: a typical European base fuel containing additive and a fuel representing worst-case of European gasolines, which is a standardized European fuel, CEC RF 86-A-96, prone to form deposits. The engine was run 60 h for each fuel simulating city driving. Emissions were taken at times 0 h (at the start of the engine), 30 h and 60 h.As a complement, particulate emissions derived from the additized base fuel were sampled on a glass filter during the first 30 h engine run. The extractable organics contained in the filter were analysed using GC/MS analysis.Generally, the emissions were dominated by gasoline components with similar relations as in the gasoline. However, for additized base fuel at 30 and 60 h the emissions were less similar to the gasoline used. The worst-case fuel produced significantly higher levels of the measured major components compared to the additized base fuel. These higher levels may be due to a less efficient combustion producing significant amounts of unburned gasoline.In the filter we found higher alkanes and similar oxygenated compounds originating from more and less degraded engine oil components.
Chemical Analysis of Exhaust Emissions from a Gasoline Direct Injection SI Engine
Sae Technical Papers
SAE 2004 World Congress & Exhibition ; 2004
2004-03-08
Conference paper
English
Chemical Analysis of Exhaust Emissions from a Gasoline Direct Injection SI Engine
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