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Improving Cold Start Emissions from an Ethanol-Fuelled Engine through an Electronic Gasoline Injector
ISSN: 0148-7191, e-ISSN: 2688-3627
Published October 25, 2010 by SAE International in United States
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This work describes an updated cold start system for ethanol fuelled engines using an electronic gasoline injector. The new system is a substitute to the conventional cold start system that employs a calibrated hole for gasoline introduction in the intake pipe. The new system is constituted by a gasoline reservoir, electrical fuel pump, fuel injector, fuel filter, and solenoid valve frequency controller. Experiments have been carried out in a production 1.0-liter, four-cylinder, ethanol-fuelled engine, submitted to transient emissions tests after cold start. The results show that the updated system reduces the cold start period by 31% in comparison to the conventional system. Acceleration after cold start was also improved, with gasoline consumption reduction of 67%. Submitting a vehicle powered by the engine equipped with the new cold start system to the cold phase of the US FTP-75 emissions test cycle (first 505 s) in order to evaluate emissions before the catalytic converter, total hydrocarbons and carbon monoxide emissions were reduced by 8.6 and 17.2%, respectively. Aldehydes (formaldehyde and acetaldehyde) and oxides of nitrogen emissions levels did not show significant change when comparing both cold start systems.
CitationSales, L., Carvalho, M., Oliveira, F., and Sodre, J., "Improving Cold Start Emissions from an Ethanol-Fuelled Engine through an Electronic Gasoline Injector," SAE Technical Paper 2010-01-2131, 2010, https://doi.org/10.4271/2010-01-2131.
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