摘要
针对柴油机超高增压后存在的机械负荷、热负荷过高及低工况供气不足等问题，本文以一超高增压舰船用柴油机为例，进行了顾氏系统、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。结果表明，顾氏系统能降低柴油机机械负荷、热负荷、燃油消耗率及NOx排放量，改善低工况性能，与相继增压结合可进一步降低NOx排放量，提高Pme，拓宽柴油机运行范围。文中通过性能优化确定了顾氏系统正时规律，从中还得出了其控制中的最低调节工况概念，据此完成了顾氏系统控制机构的优化设计，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。
By approaching such problems as insufficient air supply as well as excessively high mechanical and thermal loads lying in superturbocharged diesel engines, and taking for example a superturbocharged marine diesel engine, a performance comparison has been conducted among Gu-system, sequential turbocharging system, waste-gate system and several conventional supercharging systems. The result has shown that Gu-system can be used to reduce mechanical load, thermal load, SFC and NOx, to improve engine performance at low load and, if combined with a sequential turbocharging, to provide further reduction of NOx, improvement of Pme and extention of engine operating range. The timing law of Gu-system has been determined through optimization, whereby to leach the concept of the necessarily adjusted minimum load in its control process, and to accomplish the optimal design of Gu-system's control mechanism accordingly. The influence of the system's dynamic effect on engine scavenging characteristic has also been discussed.
出处
《柴油机》
1998年第4期18-22,40,共6页
Diesel Engine
关键词
增压
柴油机
顾氏系统
船舶
Supercharged diesel engine Gu-system Design Performance
