摘要
分析了大功率柴油机喷油流量要求,提出了压电喷油器主要部件的设计参数。结合实际发动机,确定了大流量压电式喷油器的设计方案,计算了两种压电堆和液力放大机构的输出参数,确定了双排不同喷孔直径的布置方案;通过试验分析压电执行器的响应速度,确定了喷油器最小喷射间隔时间为0.6 ms,经喷油器喷油效果验证表明:压电执行器、液力放大机构和双排喷孔的方案能满足大流量喷油的要求。
Demand on fuel injection quantity in heavy duty diesel engine was analyzed,and design method and sketch for piezoelectric injector were presented.Based on the structural size requirement of fuel injector,output character of two piezoelectricity was calculated and compared,response time of piezoelectricity was measured in given displacement,response character of hydraulic driven mechanism was measured by the experiment,dual row orifice arrange was made in nozzle couple.Combined the experimental data,injection fuel quantity for designed injector was measured and it showed that linearity of fuel injection quantity was good in some scope,minimal dwell time 0.6ms of main injection and pre-injection was measured,and injection fuel effect for this injector was observed.Results show that this sketch of piezoelectric actuator,hydraulic amplifying driven and dual row orifice can meet the demand on large flow rate injection.
出处
《农业机械学报》
EI
CAS
CSCD
北大核心
2011年第11期10-14,共5页
Transactions of the Chinese Society for Agricultural Machinery
基金
国家自然科学基金资助项目(51076014)
关键词
柴油机
喷油器
压电晶体
设计
试验
Diesel engine
Fuel injector
Piezoelectric crystal
Design
Experiment
