SBIR Phase I: THE REDUCTION OF TWO STROKE ENGINE EMISSIONS BY MEANS OF ROTARY EXHAUST VALVES

这项小型企业创新研究（SBIR）项目的更广泛影响/商业潜力是在提高发动机整体效率的同时减少二冲程排放。发动机排放直接影响环境、野生动物和公众健康。动力运动和小型轻型地面交通工具中使用的小型发动机正在成为一个重要的排放源。这项技术的发展将产生一种低成本、高功率密度、低排放的发动机。运输制造商改善排放的低成本选择有限，这项技术将为实施提供商业激励；保持低成本，同时实现低排放。STTR第一阶段的项目建议开发减少发动机排放的二冲程发动机技术。二冲程发动机成本低，功率密度高，但尽管有这些优点，二冲程发动机的主要缺点是发动机产生的排放。传统的二冲程发动机设计固有的缺点是，润滑油与燃料混合，而端口设计允许未燃烧的碳氢化合物排出发动机。该项目将解决传统两缸发动机的这些缺点，开发一种排放特征与四缸发动机相似的发动机。该奖项反映了美国国家科学基金会的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。

The broader impact/commercial potential of this Small Business Innovation Research (SBIR) project is to reduce two stroke emissions while improving overall engine efficiencies. Engine emissions directly impact the environment, wildlife, and public health. Small engines used in powersports and small lightweight ground transportation are becoming a significant source of emissions. The technology developed in this effort will yield a low cost high power density engine with reduced emissions output. Transportation manufactures have limited low cost options to improve emissions and this technology will provide a commercial incentive to implement; keeping cost low while achieving lower emissions outputs.This STTR Phase I project proposes to develop two stroke engine technology that reduces engine emissions. Two stoke engines are low cost with high power density but despite these advantages, the two stroke engines' major disadvantage is the emissions produced by the engine. The disadvantages are inherent to the design of the traditional two stroke engine with the lubrication oil being mixed with the fuel and the port design allowing unburnt hydrocarbons to exit the engine. This project will address these shortcomings of the traditional two stoke developing an engine with an emissions profile similar to that of a four stoke engine.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.