A unit pump test bench is developed on an in-line pump test platform. The bench is composed of pump adapting assembly, fuel supply subsystem, lubricating subsystem and a control unit. A crank angle domain injection co...A unit pump test bench is developed on an in-line pump test platform. The bench is composed of pump adapting assembly, fuel supply subsystem, lubricating subsystem and a control unit. A crank angle domain injection control method is given out and the control accuracy can be 0.1° crank degree. The bench can test both mechanical unit pump and electronic unit pump. A test model-PLD12 electronic unit pump is tested. Full pump delivery map and some influence factors test is done. Experimental results show that the injection quantity is linear with the delivery angle. The quantity change rate is 15% when fuel temperature increases 30 ℃. The delivery quantity per cycle increases 30 mg at 28 V drive voltage. The average delivery difference for two same type pumps is 5 %. Test results show that the bench can be used for unit pump verification.展开更多
为开发具有完全自主知识产权并满足现行排放标准要求的柴油机电控系统,实现高压共轨柴油机控制系统的完全国产化,基于国产芯片开发并优化小功率非道路国四高压共轨柴油机电控喷油系统控制策略。燃油喷射模块依据发动机转速和内部需求转...为开发具有完全自主知识产权并满足现行排放标准要求的柴油机电控系统,实现高压共轨柴油机控制系统的完全国产化,基于国产芯片开发并优化小功率非道路国四高压共轨柴油机电控喷油系统控制策略。燃油喷射模块依据发动机转速和内部需求转矩得到基本喷油量,并根据喷射控制器得到多次喷射的喷射组合、脉宽以及喷油正时;调速模块通过设置高、低怠速限值将发动机转速控制在目标怠速区间内,并采用主动阻尼控制策略抑制发动机转速波动;轨压控制模块采用前馈和双比例积分微分(proportional integral derivative,PID)闭环控制相结合的控制策略;将控制程序下载到自主开发的电子控制单元中,并在1台4缸高压共轨柴油机上进行台架试验。试验结果表明:设计的控制策略能够满足功率不超过37 kW的非道路用柴油机的控制需求;发动机在2.2 s内顺利起动,并从起动状态平稳运行至怠速状态;各工况下,发动机轨压和转速波动较小;外界负荷突变过程中,发动机转速能够在较短时间内恢复至目标转速并稳定;各污染物的比排放均满足非道路柴油机国四排放标准要求。展开更多
基金the Ministerial Level Advanced Research Foundation (404050301 .4)
文摘A unit pump test bench is developed on an in-line pump test platform. The bench is composed of pump adapting assembly, fuel supply subsystem, lubricating subsystem and a control unit. A crank angle domain injection control method is given out and the control accuracy can be 0.1° crank degree. The bench can test both mechanical unit pump and electronic unit pump. A test model-PLD12 electronic unit pump is tested. Full pump delivery map and some influence factors test is done. Experimental results show that the injection quantity is linear with the delivery angle. The quantity change rate is 15% when fuel temperature increases 30 ℃. The delivery quantity per cycle increases 30 mg at 28 V drive voltage. The average delivery difference for two same type pumps is 5 %. Test results show that the bench can be used for unit pump verification.
文摘为开发具有完全自主知识产权并满足现行排放标准要求的柴油机电控系统,实现高压共轨柴油机控制系统的完全国产化,基于国产芯片开发并优化小功率非道路国四高压共轨柴油机电控喷油系统控制策略。燃油喷射模块依据发动机转速和内部需求转矩得到基本喷油量,并根据喷射控制器得到多次喷射的喷射组合、脉宽以及喷油正时;调速模块通过设置高、低怠速限值将发动机转速控制在目标怠速区间内,并采用主动阻尼控制策略抑制发动机转速波动;轨压控制模块采用前馈和双比例积分微分(proportional integral derivative,PID)闭环控制相结合的控制策略;将控制程序下载到自主开发的电子控制单元中,并在1台4缸高压共轨柴油机上进行台架试验。试验结果表明:设计的控制策略能够满足功率不超过37 kW的非道路用柴油机的控制需求;发动机在2.2 s内顺利起动,并从起动状态平稳运行至怠速状态;各工况下,发动机轨压和转速波动较小;外界负荷突变过程中,发动机转速能够在较短时间内恢复至目标转速并稳定;各污染物的比排放均满足非道路柴油机国四排放标准要求。
