Dataset for the publication: Controlled autoignition inside an active pre-chamber using alternative fuels

The dataset covers the research data of the research paper "Controlled autoignition inside an active pre-chamber using alternative fuels" (DOI: 10.1016/j.applthermaleng.2024.125300) published in Applied Thermal Engineering. The data were measured on a thermodynamic four-stroke direct-injection spark-ignition single-cylinder engine with a compression ratio of 18.1 and equipped with an active pre-chamber. Diethoxymethane was applied as pre-chamber fuel to assess the applicability of the controlled autoignition of the pre-chamber charge. The performance of this combustion concept was compared to the application of methanol as pre-chamber fuel, which was ignited by a spark plug inside the pre-chamber. Primarily, variations of the relative air/fuel ratio in the exhaust gas were performed at an engine speed of 2000 1/min and a net indicated mean effective pressure of 12 bar. The application of diethoxymethane yielded a reliable autoignition of the pre-chamber charge, indicating no significant disadvantages in the combustion process compared to the methanol-fueled PC. The same maximum net indicated efficiency of 47% was achieved at a relative air/fuel ratio in the exhaust gas of 2.7.

本数据集涵盖发表于"Applied Thermal Engineering"（《应用热工程》）、DOI为10.1016/j.applthermaleng.2024.125300的研究论文《使用替代燃料的主动预燃烧室可控自燃》（Controlled autoignition inside an active pre-chamber using alternative fuels）的相关研究数据。实验数据采集自一台压缩比为18.1的四冲程直喷点燃式单缸热力学发动机，该发动机搭载主动预燃烧室（active pre-chamber）。研究以乙氧基甲烷（Diethoxymethane）作为预燃烧室燃料，用以评估预燃烧室混合气可控自燃的应用可行性。随后将该燃烧概念的性能，与以甲醇作为预燃烧室燃料、通过预燃烧室内部火花塞点火的方案进行了对比。核心实验变量为排气相对空燃比（relative air/fuel ratio），实验工况设定为发动机转速2000 r/min、净指示平均有效压力（net indicated mean effective pressure）12 bar。实验结果表明，使用乙氧基甲烷可实现预燃烧室混合气的可靠自燃，与甲醇驱动的预燃烧室方案相比，其燃烧过程无显著劣势；在排气相对空燃比为2.7时，两种方案均达到了47%的最高净指示热效率（net indicated efficiency）。