内燃机工程2017，Vol.38Issue(1)：12-17,6.DOI:10.13949/j.cnki.nrjgc.2017.01.003
喷气对相继增压柴油机切换过程碳烟排放的影响
Effects of Air Injection on Smoke Emissions of a Sequential-Turbocharged Diesel Engine During Switching Process
摘要
Abstract
In order to reduce the smoke of a sequential-turbocharged diesel engine during the switching process, a real-time controlling and measuring system of compressed air assist was established for a TBD234 diesel engine.An experimental study was performed to investigate the reduction of smoke emissions during the switching process by air injection.The results show that an optimal strategy is to start the air injection at the opening of exhaust valve with injection duration of 3 s.Earlier air injection or longer injection duration is ineffective to reduce engine smoke.Delaying injection or shortening injection duration weakens the benefit of the air injection.Compared with the performance of the base engine, the air injection with the optimal strategy improves the air to fuel ratio and combustion process during the switching process, with smoke reduced by 50.5%.关键词
内燃机/柴油机/相继增压/喷气/碳烟排放Key words
IC engine/diesel engine/sequential air-charging/air injection/smoke emissions分类
能源科技引用本文复制引用
孙永瑞,王银燕,王贺春,胡松,何清林..喷气对相继增压柴油机切换过程碳烟排放的影响[J].内燃机工程,2017,38(1):12-17,6.基金项目
国家"八六三"高技术研究发展计划项目(2012BAF01B00) （2012BAF01B00）
