两级增压流通特性对柴油机高密度-低温燃烧过程的影响机制的基础研究与进展

摘要

Based on the theory of high density - low temperature combustion,the effect of flow characteristics of Two-stage super-charged diesel on gas system related parameters,mixed process,combustion reaction and emission generation mechanism and the basis of scientific problems are evaluated. Reasonable organization of high density charge in cylinder is not uniformity in time and space distri-bution state.The atomization and distribution characteristics of diesel fuel are the key to improve the combustion characteristics and emis-sion characteristics of diesel engine. Furthermore, coordinating relations between the ultra-high supercharging technology and the fuel injection strategy, the variable valve technology and the EGR technology is the technical route of the heavy duty diesel engine to achieve efficient clean combustion in the whole working condition range.%以高密度-低温燃烧理论体系为基础,针对两级增压柴油机流通特性对气路系统相关参数、混合历程、燃烧反应和排放生成的影响机理等基础科学问题进行研究,提出合理组织缸内高密度充量在时间与空间的不均匀分布状态,以及柴油的雾化和分布特性是改善柴油机燃烧特性与排放特性的关键,而协调超高增压技术与喷油策略、可变气门技术、EGR 技术的耦合关系是重型柴油机在全工况范围内实现高效清洁燃烧的技术路线.