可变几何排气管增压系统的模拟试验研究  

Simulated Experimental Study on Variable Geometry Exhaust Manifold Turbocharging System

作　　者：王绍明[1] 邓康耀[1] 崔毅[1] 邢卫东[2] 

机构地区：[1]上海交通大学动力机械及工程教育部重点试验室,上海200030 [2]中国北方发动机研究所,大同037036

出　　处：《内燃机工程》2011年第1期64-69,共6页Chinese Internal Combustion Engine Engineering

基　　金：柴油机高增压技术国防科技重点实验室基金项目(9140C3307080802);国防预研项目(4010103010403)

摘　　要：针对可变几何排气管增压系统在6缸机上的应用效果进行了模拟试验研究,利用原机脉冲增压系统排气管模拟阀门关,用新加工的准定压增压系统排气管模拟阀门开。试验结果表明:在标定工况下准定压增压系统的油耗比脉冲增压系统的油耗降低4.7 g/(kW.h)。原因是当增压方式为准定压增压系统时,在强制排气过程中,排气管内排气平均压力减小,使泵气负功减小,油耗下降。The effect of the variable geometry exhaust manifold turbocharging system used in six-cylinder diesel engine was investigated. The controlled valve opened and closed modes were represented respectively by using the original exhaust manifold and the newly made exhaust manifold of semi-constant pressure. The experimental results indicate that the specific fuel consumption （SFC） of semi-constant pressure turbocharging mode reduces by 4.7 g/（kW,h） than pulse turbocharging mode in rated conditions. It is learnt from further analysis that in the semi-constant pressure turbocharging mode the SFC reduction is caused by less negative pumping work, and it in turn is attributed to the reduced average pressure in the exhaust manifold during forced exhaust.

关 键 词：内燃机 柴油机 可变几何排气管 涡轮增压 排气压力波 泵气功 

分 类 号：TK421.8[动力工程及工程热物理—动力机械及工程]