A new concept of dual fuelled SI engines run on gasoline and alcohol

Zdzisław Stelmasiak

doi:10.2478/v10174-011-0014-9

Authors

Zdzisław Stelmasiak University of Bielsko Biala, Bielsko Biala, Poland Author

DOI:

https://doi.org/10.2478/v10174-011-0014-9

Keywords:

SI engine, dual fuel, thermal efficiency, toxicity, alcohol share

Abstract

The paper discusses tests results of dual-fuel spark ignition engine with multipoint injection of alcohol and gasoline, injected in area of inlet valve. Fuelling of the engine was accomplished via prototype inlet system comprising duplex injectors controlled electronically. Implemented system enables feeding of the engine with gasoline only or alcohol only, and simultaneous combustion of a mixture of the both fuels with any fraction of alcohol. The tests were performed on four cylinders, spark ignition engine of Fiat 1100 MPI type. The paper presents comparative results of dual-fuel engine test when the engine runs on changing fraction of methyl alcohol. The tests have demonstrated an advantageous effect of alcohol additive on efficiency and TCH and NOx emission of the engine, especially in case of bigger shares of the alcohol and higher engine loads.

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