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Development of Atmospheric Air-level Emission Vehicle Technology for Gasoline Engines
Technical Paper
2009-01-1076
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Exhaust emissions of a test gasoline engine were successfully reduced to 1/30 of the SULEV standards with the aim of minimizing the impact on the atmospheric environment. This reduction was achieved by reducing engine-out emissions from engine startup and by reconciling faster catalyst light-off with suppression of catalyst thermal degradation to avoid a decline in conversion efficiency. Specifically, a new intake gas flow control device and a low heat mass spark plug with high ignitability were developed for promoting post-oxidation of unburned HCs in the combustion chamber thus markedly reducing engine-out emissions, while ensuring acceptable drivability. The conflicting requirements for quicker catalyst light-off and avoidance of catalyst thermal degradation have been achieved at unprecedented levels by developing a new bypass-type exhaust manifold. Moreover, the adoption of an HC trap catalyst developed in-house at Nissan also contributed to the attainment of cleaner emissions at levels equal to 1/30 of the SULEV standards. The levels achieved are comparable to the atmospheric concentrations of the measured species in urban areas.
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Citation
Inoue, K. and Mitsuishi, S., "Development of Atmospheric Air-level Emission Vehicle Technology for Gasoline Engines," SAE Technical Paper 2009-01-1076, 2009, https://doi.org/10.4271/2009-01-1076.Also In
References
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- Nishizawa Kimiyoshi Momoshima Sukenori Koga Masaki Tsuchida Hirofumi “Development of New Technologies Targeting Zero Emissions for Gasoline Engines” SAE Paper 2000-01-0890
- Yamamoto Shinji Matsushita Kenjirou Etoh Satomi Takaya Masahiro “In-line Hydrocarbon(HC) Adsorber System for Reducing Cold-Start Emission” SAE Paper 2000-01-0892
- Mitsuishi Shunichi Mori Kouichi Nishizawa Kimiyoshi Yamamoto Shinji “Emission Reduction Technologies for Turbocharged Engines” SAE Paper 1999-01-3629
- SAE International “Technologies for Near-Zero-Emission Gasoline-Powered Vehicles” 27