柴油机增压技术在高原环境下的应用

总结了高原环境对发动机各方面性能的影响,以及研究人员针对功率下降提出的解决措施。增压系统的改进成为目前主要研究方向,介绍了两类改进措施:高原增压匹配和可调增压技术。以带放气阀的增压器、可调截面涡轮、二级增压、相继增压、电辅助增压和复合增压这几种典型的可调增压为重点,介绍了各种技术的原理、发展、应用现状,并讨论了这些技术在高原环境下的应用前景。通过研究成果的总结和方案之间的对比可知,可变截面涡轮、二级增压、转速可控复合增压方案不仅能够使柴油机获得较好的高原功率恢复效果,而且具有较强的实用价值。

Application of Supercharging Technologies for Diesel Engine at Plateau

Firstly,the adverse effects of plateaus ambient conditions on engines and the corresponding solutions are reviewed. The improvement for turbocharging system has been drawing the attention of researchers,who were dedicated to power recovery for engines running at plateau. And two types of such improvement are introduced- matching turbocharger for plateaus usage and adjustable turbocharging technologies. Secondly,the theories,history and the status quo of typical adjustable turbocharging tech-nologies are presented individually,such as： Turbo Waste-gate technology,variable geometry turbocharger （VGT）,two stage turbo-charger（TST）,sequential turbocharging system（STC）,electrically assisted turbocharger （EAT）and Combined Supercharging Sys-tem （CSC）. What＆#39;s more,the prospect of every technology applying at plateau was also discussed. Eventually,after the discussion and comparison,VGT, TST and Speed-Controllable Combined Supercharging were considered to be capable to enhance the power of diesel engines at plateau and also easy to be carried out.