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Emission Reduction of a Stoichiometric Gasoline Direct Injection Engine
Technical Paper
2005-01-3687
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
During the development of conventional PFI engines, WOT (Wide Open Throttle) performance tends to be sacrificed for exhaust emission reduction in order to meet the latest emissions regulations. To satisfy both power and emissions, a new V-6 engine employing stoichiometric gasoline direct injection, the 3GR-FSE, with variable intake and exhaust valve timing systems, was developed and meets the ULEV exhaust emission standard without sacrificing WOT performance. It is generally understood that THC emissions are reduced during warm-up through quick catalyst light-off by retarding ignition timing. However, the effect of this is limited by engine torque fluctuations. Under this warm-up condition, stratified charge combustion is known to significantly improve the engine torque fluctuation and enable more retard ignition timing. Furthermore, by using the variable exhaust valve-timing system, the internal EGR gas assists fuel spray atomization, increasing the expansion ratio to promote HC combustion in the chamber. As a result, THC emissions are reduced.
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Citation
Morita, K., Sonoda, Y., Kawase, T., and Suzuki, H., "Emission Reduction of a Stoichiometric Gasoline Direct Injection Engine," SAE Technical Paper 2005-01-3687, 2005, https://doi.org/10.4271/2005-01-3687.Also In
References
- Harada, J. Tomita, T. Mizuno, H. Mashiki, Z. Ito, Y. “Development of Direct Injection Gasoline Engine” SAE 970540
- Kanda M. “Application of a New Combustion Concept to Direct Injection Gasoline Engine” SAE Paper 2000-01-0531 Kanda M. “Application of a New Combustion Concept to Direct Injection Gasoline Engine” SAE Paper 2000-01-0531
- Abe S. Sasaki K. et al. “Combustion Analysis on Piston Cavity Shape of a Gasoline Direct Injection Engine” SAE Paper 2001-01-2029
- Sadakane S. Sugiyama M. et al. “Development of a New V-6 High Performance Stoichiometric Gasoline Direct Injection Engine” SAE Paper 2005-01-1152