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Electronic Control of Air-Fuel Ratios in a Carburator for Two-Wheeler Application
Technical Paper
2009-01-1429
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
The simple design and low cost of the carburator makes it an attractive proposition to be used for two-wheeler applications in India and other countries. However, stringent emission standards pose greater challenge in carburator matching for different vehicle applications. The use of electronics for controlling the air-fuel ratio in a carburator with closed-loop control to meet Euro-III standards is the driving force to undertake this project. The goal is to achieve the best catalytic converter efficiency when the air-fuel-ratio is maintained at stoichiometric within a close band.
Inherent variations in manufacturing of carburators can cause the air-fuel ratio to drift from stoichiometric and have an adverse effect on catalytic converter efficiency.
The most efficient method of maintaining air-fuel ratio within a close band near stoichiometric is through closed-loop control. This method is widely used in passenger cars with fuel injection. However, the need for a low cost system for two-wheeler is well known. Electronic closed-loop control system has been developed for carburator used in a 90cc 4-stroke two-wheeler for meeting the Euro-III emission norms.
This paper illustrates some of the research done to adapt electronic carburetion with closed-loop control to meet the Euro-III emission standards.
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Citation
Sundar, D., VenuMadhav, S., Srinivasan, B., Govindarajan, S. et al., "Electronic Control of Air-Fuel Ratios in a Carburator for Two-Wheeler Application," SAE Technical Paper 2009-01-1429, 2009, https://doi.org/10.4271/2009-01-1429.Also In
References
- Govindarajan S. Carburetors using electronic controls-Motor India September 2002
- Mudgal R.R. et al. Development of Electronic Feedback Carburetor to meet year 2000 Indian emission norms-SAE Paper 990034 - SIAT 1999 - ARAI Pune-India
- Ujjwala et al - Development of Electronic Carburetor for 4 stroke two wheeler vehicles-SAE Paper 2003-26-0025 -SIAT 2003, ARAI Pune-India
- Sundar et al. Electronic control of air-fuel ratio in a Carburetor for two-wheeler application-SAE Paper No: 2008-028-0057 - International Mobility Conference-SIIMC 2008 New Delhi, India