超高增压柴油机全工况性能的研究

Study on the WholeLoadRange Performance of Superturbocharged Diesel

以一超高增压舰船柴油机为例，研究了顾氏系统及其对柴油机性能的改善．通过与相继增压系统、高工况放气系统及几种常规增压系统的性能对比，分析了其运行范围，提出了最低调节工况概念．实践证明，采用顾氏系统能降低柴油机机械负荷、热负荷、油耗及ＮＯｘ，改善低工况性能．文中还确立了顾氏系统设计方法，并就系统动力学效应及其对柴油机换气特性的影响进行了讨论．

The Gusystem is introduced to superturbocharged diesel. Based on the performance comparisons of the Gusystem with the sequential turbocharging system (STC), waste gate system and other several ordinary systems, a new concept of the lowest adjusted load point is suggested. It is proved that the Gusystem has advantage of reducing mechanical and thermal load, be and NOx, and improving partial load performance. The effects on diesel dynamics and airexchanging have been investigated, and a method to design the Gusystem is established, whose adaptability and efficiency have been turned out by practice.