N-butanol and isobutanol as alternatives to gasoline: Comparison of port fuel injector characteristics
1 Technical University of Liberec, Department of Power Engineering Equipment, Studentská 1402/2, Liberec I, Czech Republic
2 Technical University of Liberec, Department of Vehicles and Engines, Studentská 1402/2, Liberec I, Czech Republic
3 Czech Technical University in Prague, Center for Sustainable Mobility, Prilepska 1920, Roztoky u Prahy, Czech Republic
a Corresponding author: firstname.lastname@example.org
Published online: 28 March 2016
The paper reports on an experimental investigation of the relationship between the pulse width of a gasoline engine port fuel injector and the quantity of the fuel injected when butanol is used as a fuel. Two isomers of butanol, n-butanol and isobutanol, are considered as potential candidates for renewable, locally produced fuels capable of serving as a drop-in replacement fuel for gasoline, as an alternative to ethanol which poses material compatibility and other drawbacks. While the injected quantity of fuel is typically a linear function of the time the injector coil is energized, the flow through the port fuel injector is complex, non ideal, and not necessarily laminar, and considering that butanol has much higher viscosity than gasoline, an experimental investigation was conducted. A production injector, coupled to a production fueling system, and driven by a pulse width generator was operated at various pulse lengths and frequencies, covering the range of engine rpm and loads on a car engine. The results suggest that at least at room temperature, the fueling rate remains to be a linear function of the pulse width for both n-butanol and isobutanol, and the volumes of fuel injected are comparable for gasoline and both butanol isomers.
© Owned by the authors, published by EDP Sciences, 2016
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