Eventos Anais de eventos
COBEM 2023
27th International Congress of Mechanical Engineering
Influence of heating a port fuel injection system on hydrous ethanol in an optically accessible spark ignition engine
Submission Author:
Frederico Weissinger , SP
Co-Authors:
Frederico Weissinger, Pedro Lacava, Alexander Penaranda, Andre Martelli, Fábio Dias, Enrico Rapetti Malheiro de Oliveira, Leila Ribeiro dos Santos, Vincent Bigliardi
Presenter: Pedro Lacava
doi://10.26678/ABCM.COBEM2023.COB2023-0625
Abstract
The increase in energy demand due to population growth and the rise in living standards is a well-established trend. Such demand for energy cannot be met solely by fossil fuels, given the associated adverse effects such as pollution, climate change, and natural disasters. Furthermore, stricter CO2 emission regulations require advanced engine technologies to comply with the progressive limits. Consequently, there has been an upsurge in interest in synthetic and renewable fuels - such as ethanol - in spark ignition engines aiming at mitigating the CO2 emissions and reducing the greenhouse impacts. However, to limit unburned hydrocarbons and other emissions during cold start phase, ethanol heating devices are required in MPI systems. In this context, this research used an optical single cylinder to study the early cold phase of a spark ignition engine with a heated multi-hole port fuel injector using hydrous ethanol (containing 5% water). A fuel temperature of 10°C and three injector tip temperatures were compared at both 1200 and 2000 rpm and stochiometric air fuel ratio. Optical measurements were taken using a quartz piston window and a quartz cylinder liner, from each flame propagation and fuel film formation analyzes were performed. The optical measurements were also compared with the thermodynamic parameters derived from cylinder pressure measurements. The results indicate a higher fuel vaporization, flame propagation speed and indicated mean effective pressure when the injector was heated, especially at 1200 rpm, where the late ignition strategy for catalyst heat up (spark at TDC) induces greater instabilities.
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