西华大学学报（自然科学版）2011，Vol.30Issue(1)：5-8,4.
EGR率控制精度对车用增压直喷柴油机性能的影响
Effect of EGR Rate Control Precision on the Performance of Diesel Engine with Vehicle Turbocharged Direct Injection
摘要
Abstract
The author presented a set of electronic vacuum controlled EGR system and a set of step motor controlled EGR system and calibrated their EC R rate, which matched the diesel engines respectively, and moreover investigated the effect of EGR rate control precision on fuel economy and exhaust emission based on aforementioned work by using those two EGR systems.The results show that the EGR rate universal characteristics of the step motor controlled EGR system are smoother than that of the vacuum controlled EGR system, which has break points.Therefore, the control precision of step motor controlled EGR system is better than that of vacuum controlled EGR system.The brake specific fuel consumption( BSFC)of the engine that matched electronic vacuum EGR system is higher when the diesel engine runs in light load regions, but the control method of EGR nearly has no effect on BSFC when the diese1 engine runs in heavy load regions.The NOX emission of the engine that matched step motor controlled EGR system is higher when operating in high speed and heavy load regions, but lower when operating in high and middle speed and heavy load regions.关键词
动力机械及工程/真空式EGR系统/步进电机式EGR系统/EGR率控制精度/发动机性能Key words
power machinery and engineering/ vacuum EGR system/ step motor EGR system/ EGR rate control precision/ engine performance分类
能源科技引用本文复制引用
田维..EGR率控制精度对车用增压直喷柴油机性能的影响[J].西华大学学报（自然科学版）,2011,30(1):5-8,4.基金项目
四川省省属高校科研创新团队建设计划(KYTD201003) （KYTD201003）
