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Distribution of the Fuel Flow in a Cold Start System Using an Electronic Fuel Injector
Technical Paper
2007-01-2706
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Cold start systems provide the introduction of gasoline inside the engine intake system during cold start and warm-up acceleration, as ethanol fuel shows engine operation difficulties at low temperatures. Despite the technological evolution, traditional cold start systems may present problems mainly related to flow control and gasoline distribution to the engine cylinders hindering cold start and warm-up operation with the increasing of emissions levels and fuel consumption. The cold start system used allows for simultaneous gasoline introduction through calibrated orifices in the four conduits of the intake system. Adjustment of gasoline flow is made by an electronic fuel injector. The objective of this work is to analyze numerically and experimentally the gasoline flow in an auxiliary cold start system for vehicles with engines using ethanol or ethanol-gasoline blends (flex fuel). Computational fluid dynamics made possible to determine the calibrated hole diameters for more efficient pulverization and uniform distribution of gasoline to the engine cylinders.
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Authors
- Luís Carlos Monteiro Sales - FIAT POWERTRAIN TECHNOLOGIES, Product Improvement Division, Betim, Brasil
- Rudolf Huebner - Universidade Federal de Minas Gerais, Departamento de Engenharia Mecânica, Belo Horizonte, Brasil.
- Cristiana Brasil Maia - Pontifícia Universidade Católica de Minas Gerais, Departamento de Engenharia Mecânica, Belo Horizonte, Brasil.
- José Ricardo Sodré - Pontifícia Universidade Católica de Minas Gerais, Departamento de Engenharia Mecânica, Belo Horizonte, Brasil.
Citation
Sales, L., Huebner, R., Maia, C., and Sodré, J., "Distribution of the Fuel Flow in a Cold Start System Using an Electronic Fuel Injector," SAE Technical Paper 2007-01-2706, 2007, https://doi.org/10.4271/2007-01-2706.Also In
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