摘要
柴油公交车在起步加速时,由于涡轮增压器响应滞后及机械与气体的惯性影响,造成进气量不足,排气烟度急剧升高。作者试图通过公交车上压缩空气系统,对涡轮增压器实施提前补气的途径来进一步改善柴油公交车起步加速冒黑烟的问题。探讨了在公交车上采用提前补气方案的设计思路,设计了控制系统,提出了具有自学习功能的补气起始时刻控制模式和基于发动机转速的补气终止时刻控制方法。通过在CA6DL1柴油机上分别作不补气、根据油门变化率补气和提前补气对柴油机烟度排放影响的实验。实验证明:该系统能缩短进气管建立压力的时间,进一步增加进气管增压压力;同时,与不补气和根据油门变化率补气相比,碳烟排放显著降低。
When public traffic bus equipped with the turbocharged is going to start or accelerate, because of effects of the lag of a turbocharger, the inertial of machinery and gas, which results that the inlet air flow of a diesel engine is insufficient and then exhaust smoke increases quickly. In order to further reduce the exhaust of the smoke of a diesel engine, the compressed air system of a bus is utilized to inject additional air into the compressor in advance for acceleration. The design idea of the advanced injecting additional air in a bus is discussed, the control system is designed, and thus the control strategy that can automatically adjust with the starting time of the air injection and the control method that is a sign of the end of the injection air based on the engine speed are proposed. The test is conducted on the CA6DL1 diesel engine to study the effects of non-air injection, delay and advanced air injection. The experiment results show that this system can shorten the time of the inlet pipe pressure build-up, further increase the inlet pipe supercharging pressure; what＇s more, compared with non-air and delayed air injection, exhaust soot emissions are efficiently reduced.
出处
《控制工程》
CSCD
北大核心
2017年第4期804-809,共6页
Control Engineering of China
基金
江苏省交通厅交通科学研究计划项目“公交柴油车节能减排技术研究与应用”(2011N08)
关键词
提前补气
控制策略
柴油公交车
起步加速
碳烟排放
Advanced air injection
control strategy
diesel bus
start acceleration condition
smoke emission
