废气再循环改善均质压燃发动机高负荷爆燃的试验研究  

Experimental Study on the Improvement of Knock at High Load of a HCCI Engine By Exhaust Gas Recirculation

作　　者：何超[1] 纪常伟[1] 何洪[1] 

机构地区：[1]北京工业大学环境与能源工程学院,北京100022

出　　处：《小型内燃机与摩托车》2009年第1期5-7,共3页Small Internal Combustion Engine and Motorcycle

基　　金：国家重点基础研究发展规划项目(2001CB209201);国家自然科学基金资助项目(50522202);清洁汽车产业化关键技术研究与示范国家科技攻关项目(2005BA413B06)

摘　　要：针对均质压燃发动机高负荷易爆燃的问题,在1台均质压燃发动机上加装废气再循环装置,把燃烧废气冷却后引入到进气中,在台架上进行试验并验证其可行性。试验结果表明,采用高浓度的EGR能够有效抑制HCCI发动机的爆燃并拓宽高负荷的工况范围,发动机峰值压力升高率降低,着火时刻推迟,有效放热时间增长,缸内最大压力峰值降低。With regard to the HCCI engine knock at high load, an EGR apparatus was installed on a HCCI engine to verify the feasibility of ingesting cooled EGR into the intake to appease engine knock on an engine bench. The test results indicate that high EGR rate could effectively ease engine knock, enlarge the operating range at high load, reduce the peak pressure rise rate, delay the ignition timing, increase the combustion duration, and cut down on the peak cylinder pressure.

关 键 词：废气再循环 均质压燃 爆燃 高负荷 

分 类 号：TK421[动力工程及工程热物理—动力机械及工程]