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Effect of gasohol blended fuels in a SI engine

Sud, Rahul (2017). Effect of gasohol blended fuels in a SI engine. Bachelor of Engineering (4th Year Project) Thesis, Charles Darwin University.

Document type: Thesis
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Author Sud, Rahul
Title Effect of gasohol blended fuels in a SI engine
Institution Charles Darwin University
Publication Date 2017-07
Thesis Type Bachelor of Engineering (4th Year Project)
Supervisor Lugg, Chris
Nguyen, Vinh Khanh
0913 - Mechanical Engineering
Abstract With an increase in greenhouse gas emissions and the ever-imminent concern of depleting fuel sources around the world, the need for a renewable source of fuel has become a highly warranted interest. With Australia currently importing approximately 91% of its fuel source, it is estimated by 2030 Australia will have no indigenous fuel refinery capacity. To prevent the need to import 100% of Australia’s fuel source, gasoline ethanol blended fuels have been considered as an alternative. Ethanol is a renewable source of fuel, as it can be made from agricultural crops within the country. The Australian Fuel Standards Quality Act of 2000 has limited the commercial production of gasoline and ethanol blended fuels (also known as gasohol), to 10% ethanol and 90% gasoline blend or better known as E10. This is because gasohol has the capability to corrode an internal combustion engine (ICE) internally. However, since the Australian Government produces and commercially sells E10 at fuel stations throughout the country there must be beneficial effects of gasohol.

The benefits of gasohol have been stated to involve a major reduction in exhaust emissions such as nitrogen oxide (𝑁𝑂π‘₯), hydro carbon (𝐻𝐢), and carbon monoxide (𝐢𝑂). However, it has not been stated whether gasohol presents any performance benefits when used to counteract possible corrosion in current ICEs, especially at higher ethanol blends. For the ability to use higher ethanol blended fuels, modifications to the current ICE is required.

This thesis looks to investigate the performance aspects of using gasohol in relation to torque and fuel consumption and whether the performance aspects and emission reduction are worth the need to modify current ICE for future vehicle developments. Literature regarding this topic was analysed and discussed. Predictions on physical testing based upon literature were made for a 6 cylinder Barra engine using E5, E10, E15, and E20 to obtain results relating to the torque and fuel consumption with in a real world operating ICE. The data is to be compared to a benchmark base result using unleaded 91fuel.
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Created: Wed, 13 Sep 2017, 11:33:34 CST by Jessie Ng