Low Carbon Renewable Fuels for Future Sustainable Propulsion

低碳或零碳足迹的可再生燃料有望减少运输部门的温室气体排放，实现碳中和的未来。该合作研究项目的目标是最大限度地提高动力系统的能源效率，采用高性能可再生燃料，碳足迹超低至零。研究低碳可再生燃料的分子结构、燃料性质和性能之间的关系，以及先进的燃烧方案和喷射策略，以寻求汽车和电力生产行业低碳推进的未来发展方向。可再生燃料研究联盟有以下目标：1）。研究低碳可再生燃料的化学反应性，以实现高效燃烧模式，包括提前压缩点火，稀薄分层火花点火和混合控制压缩点火2）。提高对可再生燃料特性在各种燃烧模式下对燃料喷雾、混合历史、充量稀释和点火特性的影响的理解3）。为可再生燃料开发合适的燃烧策略，适用于所有负载下的轻型/重型应用，并通过自定义控制喷射正时、多次喷射事件和火花辅助4）进一步减少标准排放。开发具有对燃料特性敏感的缸内燃烧诊断机构的有效点火系统，用于稀燃SI和先进的压缩点火燃烧控制。工程学科预期的益处包括：a）产生新的理论知识和经验数据，这些知识和经验数据对于更准确和全面地理解低碳汽车发动机燃烧过程中的各种类型的可再生燃料是有价值的; B）制定燃料供应策略和燃烧方案，为工业平稳过渡到可再生燃料做好准备。

Renewable fuels with low or zero carbon footprint show promises to reduce greenhouse gas emissions in the transportation sector towards a carbon neutral future. The goal of this collaborative research project is to maximize energy efficiency of powertrains utilizing high performance renewable fuels with ultralow-to-zero carbon footprint. Relationships between molecular structure, fuel properties and performances of various types of low-carbon renewable fuels will be investigated, together with advanced combustion schemes and injection strategies to seek future development directions of low carbon propulsion for the automotive and power production industry. The renewable fuel research consortium has the following objectives: 1). To study the chemical reactivity of low carbon renewable fuels for high efficiency combustion modes enabling, including advance compression ignition, lean-stratified spark ignition, and mixing controlled compression ignition 2). To improve the understanding on the impacts of renewable fuel properties on fuel spray, mixing history, charge dilution, and ignition characteristics under various combustion modes3). To develop suitable combustion strategy for renewable fuels suitable for light duty/heavy duty applications at all loads with further reduction of criteria emissions via custom control of injection timing, multiple injection events, and spark assistance4). To develop effective ignition system with in-cylinder combustion diagnostic mechanism sensitive to fuel properties for lean burn SI and advanced compression ignition combustion control Benefits expected to the engineering disciplines include: a) The generation of new theoretical knowledge and empirical data valuable for creating a more accurate and comprehensive understanding of various types of renewable fuels in combustion processes for low carbon automotive engines; b) The development of fueling strategies and combustion schemes ready for industry for a smooth transition to renewable fuels.