Presentation of the Performance and Emissions of a Stratified Torch Ignition Prototype Engine Fuelled by a Blend of Ethanol and Gasoline

In a torch ignition engine system the combustion starts in a prechamber, where the pressure increase pushes the combustion jet flames through calibrated nozzles to be precisely targeted into the main combustion chamber.

The paper presents the layout of the prototype engine and the developed fuel injection system. It continues with a detailed description of the performance of the torch ignition engine running on a gasoline/ethanol blend for different mixture stratification levels as well as engine speeds and loads. Also detailed analyses of specific fuel consumption, thermal and combustion efficiency, specific emissions of CO₂ and the main combustion parameters are carried out. A supplementary decrease in NO_X emissions was obtained by use of Brazilian pure hydrated fuel.

The paper concludes presenting the main results obtained in this work, which show significant increase of the torch ignition engine performance in comparison with the commercial baseline engine.