CAJ | 학술논문

对配置在1台重型车用柴油机上的二级增压系统进行了性能研究.结果表明 :放气阀开启的二级增压系统存在进气能力不足、压气机效率低的问题 ;关闭二级增压放气阀后 ,在中、低转速低负荷工况仅采用高压级增压器 ,而其余工况借助高压级涡轮旁通阀实现进气压力可调 ,增压系统压气机效率均可超过60% ,且最大进气压力可达334 kPa;针对不同工况采用不同增压形式 ,通过控制涡轮旁通阀开度使二级增压系统进气压力及压比分配得到有效调节 ,可以改善压气机效率及燃油经济性 ,为二级增压系统与重型柴油机的性能匹配提供技术参考.
대배치재1태중형차용시유궤상적이급증압계통진행료성능연구.결과표명 :방기벌개계적이급증압계통존재진기능력불족、압기궤효솔저적문제 ;관폐이급증압방기벌후 ,재중、저전속저부하공황부채용고압급증압기 ,이기여공황차조고압급와륜방통벌실현진기압력가조 ,증압계통압기궤효솔균가초과60% ,차최대진기압력가체334 kPa;침대불동공황채용불동증압형식 ,통과공제와륜방통벌개도사이급증압계통진기압력급압비분배득도유효조절 ,가이개선압기궤효솔급연유경제성 ,위이급증압계통여중형시유궤적성능필배제공기술삼고.
The performance of a two-stage turbocharging system equipped on a heavy-duty diesel engine was studied .The re-sults show that the two-stage turbocharging system opened by air bleed valve has the problems of pressure boost deficiency and low compressor efficiency . The compressor efficiency can surpass 60% and the maximum intake pressure may increase to 334 kPa by using the high pressure stage compressor in low load at medium and low speed and adjusting the intake pressure with high pressure stage turbine bypass valve in the remaining conditions after closing the air bleed valve .According to differ-ent supercharging forms under different working conditions ,the intake pressure and pressure ratio distribution of two-stage turbocharging system is effectively adjusted by controlling the opening of turbine bypass valve .Accordingly ,the compressor ef-ficiency and fuel economy improved ,which provided the reference for performance matching between heavy-duty diesel engine and two-stage turbocharging system .