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Improving Flow Tolerances of Mass Produced Carburetors through Pilot System Design
Technical Paper
2009-01-1055
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Carburetors are widely used for two wheeler applications in India as well as countries like Taiwan, Indonesia and China. These carburetors are characterized by simple design and low cost. As the emission norms are becoming more and more stringent, matching the carburetors for vehicle application becomes very challenging. Earlier it was widely believed that, for meeting the Euro-3 regulations, even two wheelers with small engine capacity had to employ electronic fuel injection. However, many vehicle manufacturers have successfully developed carburetors for meeting Euro-3 norms by employing catalytic converters without any electronic control. This development has been essentially motivated by the need for low cost.
Flow variation is inherent in mass produced carburetors because there are many parts, which contribute to the air-fuel ratio delivered by the carburetor. Carburetors with the mixture control pilot systems were mass-produced and compared for results with air control system. Results indicate that mixture control system for pilot circuit gives consistently good performance resulting in reduced rejection at manufacturing stage and consistent performance in the vehicle.
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Citation
Murugan, M., Venumadhav, S., Srinivasan, B., and Govindarajan, S., "Improving Flow Tolerances of Mass Produced Carburetors through Pilot System Design," SAE Technical Paper 2009-01-1055, 2009, https://doi.org/10.4271/2009-01-1055.Also In
References
- Hendricks Terry “Numerical and Theoretical fuel Flow Analysis of Small Engine carburetor Idle Circuits” SAE paper No. 2006-32-0111
- Arias. Diego A. “Numerical and Experimental Study of Fuel and Air Flow in Carburetors for Small Engines” SAE paper No. 2004-32-0053