双阀电控单体泵系统的喷射特性研究
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摘要
在AMESim环境下建立双阀电控单体泵系统的仿真模型,通过试验对比验证模型的准确性。研究压力峰值、喷油量及平均喷油速率等在低转速范围内随控制角度差和转速的变化规律,并探索双阀系统的三次喷射特性。试验结果表明,在低转速下,增加控制角度差能明显改善喷油特性,控制角度差小于4°(一定角度)时,喷油压力、平均喷油速率等随控制角度差的增加变化不明显,而喷油量增量随控制角度差的增加变化相对稳定。采用变速率凸轮型线能有效降低后喷射的喷射压力,有利于灵活控制后喷射的喷油量。
The paper established a simulation model for the double-valve electronically controlled fuel injection system using AMESim and the accuracy of the model was proved by comparing to experimental results. The paper studied, in the low speed range, the variation of peak pressure, the fuel injection quantity and the average injection rate with respect to rotational speed and the difference in the controlled angle, and explored the three injections characteristics of double valve system. It is found that, at low speeds, increasing the angle difference can significantly improve the injection characteristics.When the angle difference is smaller than 4°(a certain angle), the injection pressure and the average injection rate do not change significantly. The increment in the fuel injection quantity remains relatively stable with the increasing angle difference.The use of a variable-speed cam profile can effectively reduce the injection pressure in post injection, allowing more flexible control of fuel injection quantity in post injection.
The paper established a simulation model for the double-valve electronically controlled fuel injection system using AMESim and the accuracy of the model was proved by comparing to experimental results. The paper studied, in the low speed range, the variation of peak pressure, the fuel injection quantity and the average injection rate with respect to rotational speed and the difference in the controlled angle, and explored the three injections characteristics of double valve system. It is found that, at low speeds, increasing the angle difference can significantly improve the injection characteristics.When the angle difference is smaller than 4°(a certain angle), the injection pressure and the average injection rate do not change significantly. The increment in the fuel injection quantity remains relatively stable with the increasing angle difference.The use of a variable-speed cam profile can effectively reduce the injection pressure in post injection, allowing more flexible control of fuel injection quantity in post injection.
引文
[1]仇滔,刘兴华,刘福水,等.高压双电磁阀燃油系统特性分析[J].农业机械学报,2008,39(11):6-10.Qiu Tao,Liu Xinghua,Liu Fushui,et al.Characteristics Analysis of Double Valves Fuel System with High Pressure[J].Transactions of the Chinese Society for Agricultural Machinery,2008,39(11):6-10.(in Chinese)
[2]郝守刚,周明,夏胜枝,等.电控单体泵电磁阀动态响应特性数值仿真[J].内燃机工程,2003,24(2):10-13.Hao Shougang,Zhou Ming,Xia Shengzhi,et al.Numerical Simulation of Dynamic Response Characteristics of Solenoid Valve for Electronically Controlled Unit Injection Pump[J].Chinese Internal Combustion Engine Engineering,2003,24(2):10-13.
[3]PANESAR L.国际重型柴油机技术发展趋势以及电控泵喷嘴、电控单体泵和共轨技术的应用[R].北京:中国内燃机协会,2011.PANESAR L.The International Development Trend of the Heavy Diesel Engine Technology and Electric Pump Nozzle,Electronic Control Unit Pump and Common Rail Technology[R].Beijing:China Internal Combustion Engine Industry Association,2011.(in Chinese)
[4]袁永先,尹天佐,马维忍.柴油机喷油装置及喷油技术的发展动态[J].小型内燃机与摩托车,2006,35(6):52-55.Yuan Yongxian,Yin Tianzuo,Ma Weiren.Developing of the Injection Device and the Injection Technology[J].Small Internal Combustion Engine and Motorcycle,2006,35(6):52-55.(in Chinese)
[5]WOLVERTON M A,KISS T.Analytic Comparison of 2and 3 Way Digital Valves for Use on Direct Needle Control Fuel Injectors[C]//SAE Paper 2004-01-0032.
[6]CATANIA A E,FERRARI A.Advanced Mathematical Modeling of Electronic Unit-Injector Systems for Heavy Duty Diesel Engine Application[C]//SAE Paper 2008-01-1195.
[7]GREEVES G,TULLIS S,BARKER B.Advanced TwoActuator EUI and Emission Reduction for Heavy-Duty Diesel Engines[C]//SAE Paper 2003-01-0698.
[8]王裕鹏,刘兴华,刘福水,等.高压双电磁阀控制燃油喷射系统特性的试验研究[J].汽车工程,2012,34(1):13-18.Wang Yupeng,Liu Xinghua,Liu Fushui,et al.An Experimental Study on the Characteristics of Fuel Injection System with Dual High-Pressure Actuator Control[J].Automotive Engineering,2012,34(1):13-18.(in Chinese)
[9]仇滔,刘兴华,刘福水,等.一种新型的双电磁阀燃油系统[J].北京理工大学学报,2008,28(8):674-677.Qiu Tao,Liu Xinghua,Liu Fushui,et al.Design for a New Fuel System[J].Transaction of Beijng Institute of Technology,2008,28(8):674-677.(in Chinese)
[10]CHAUFOUR P,MILLET G,HEDNA M,et a1.Advanced Modeling of a Heavy-Truck Unit-Injector System and Its Applications in the Engine Design Process[C]//SAE Paper 2004-01-0020.
[11]杨时威,吴长水,冒晓建,等.电控单体泵燃油喷射系统仿真[J].系统仿真学报,2009,21(6):1743-1747.Yang Shiwei,Wu Changshui,Mao Xiaojian,et al.Simulation of Electronic Unit Pump Fuel Injection System[J].Journal of System Simulation,2009,21(6):1743-1747.(in Chinese)
[12]王凤丽.电控单体泵燃油喷射系统耦合仿真[J].中国工程机械学报,2008,6(2):214-216.Wang Fengli.Coupling Simulation on Fuel Injection System for Single-Unit Electronic-Control Pump[J].Chinese Journal of Construction Machinery,2008,6(2):214-216.(in Chinese)
[13]ROELS P,SLEDSENS Y,VERHELST S.Reducing Engine-Out Emissions for Medium High Speed Diesel Engines:Influence of Injection Parameters[C]//SAE Paper 2009-01-1437.
[14]Huang Yiqun,LEET J.Investigation of In-cylinder NOx and PM Reduction with Delphi E3 Flexible Unit Injectors on a Heavy-Duty Diesel Engine[C]//SAE Paper 2008-01-1792.
[15]冷先银,隆武强,冯立岩,等.喷射率对柴油机性能和排放影响数值模拟研究[J].大连理工大学学报,2011,51(2):181-187.Leng Xianyin,Long Wuqiang,Feng Liyan,et al.Injection Rate on Diesel Engine Performance and Emissions Impact Numerical Simulation Research[J].Journal of Dalian University of Technology,2011,51(2):181-187.(in Chinese)
[2]郝守刚,周明,夏胜枝,等.电控单体泵电磁阀动态响应特性数值仿真[J].内燃机工程,2003,24(2):10-13.Hao Shougang,Zhou Ming,Xia Shengzhi,et al.Numerical Simulation of Dynamic Response Characteristics of Solenoid Valve for Electronically Controlled Unit Injection Pump[J].Chinese Internal Combustion Engine Engineering,2003,24(2):10-13.
[3]PANESAR L.国际重型柴油机技术发展趋势以及电控泵喷嘴、电控单体泵和共轨技术的应用[R].北京:中国内燃机协会,2011.PANESAR L.The International Development Trend of the Heavy Diesel Engine Technology and Electric Pump Nozzle,Electronic Control Unit Pump and Common Rail Technology[R].Beijing:China Internal Combustion Engine Industry Association,2011.(in Chinese)
[4]袁永先,尹天佐,马维忍.柴油机喷油装置及喷油技术的发展动态[J].小型内燃机与摩托车,2006,35(6):52-55.Yuan Yongxian,Yin Tianzuo,Ma Weiren.Developing of the Injection Device and the Injection Technology[J].Small Internal Combustion Engine and Motorcycle,2006,35(6):52-55.(in Chinese)
[5]WOLVERTON M A,KISS T.Analytic Comparison of 2and 3 Way Digital Valves for Use on Direct Needle Control Fuel Injectors[C]//SAE Paper 2004-01-0032.
[6]CATANIA A E,FERRARI A.Advanced Mathematical Modeling of Electronic Unit-Injector Systems for Heavy Duty Diesel Engine Application[C]//SAE Paper 2008-01-1195.
[7]GREEVES G,TULLIS S,BARKER B.Advanced TwoActuator EUI and Emission Reduction for Heavy-Duty Diesel Engines[C]//SAE Paper 2003-01-0698.
[8]王裕鹏,刘兴华,刘福水,等.高压双电磁阀控制燃油喷射系统特性的试验研究[J].汽车工程,2012,34(1):13-18.Wang Yupeng,Liu Xinghua,Liu Fushui,et al.An Experimental Study on the Characteristics of Fuel Injection System with Dual High-Pressure Actuator Control[J].Automotive Engineering,2012,34(1):13-18.(in Chinese)
[9]仇滔,刘兴华,刘福水,等.一种新型的双电磁阀燃油系统[J].北京理工大学学报,2008,28(8):674-677.Qiu Tao,Liu Xinghua,Liu Fushui,et al.Design for a New Fuel System[J].Transaction of Beijng Institute of Technology,2008,28(8):674-677.(in Chinese)
[10]CHAUFOUR P,MILLET G,HEDNA M,et a1.Advanced Modeling of a Heavy-Truck Unit-Injector System and Its Applications in the Engine Design Process[C]//SAE Paper 2004-01-0020.
[11]杨时威,吴长水,冒晓建,等.电控单体泵燃油喷射系统仿真[J].系统仿真学报,2009,21(6):1743-1747.Yang Shiwei,Wu Changshui,Mao Xiaojian,et al.Simulation of Electronic Unit Pump Fuel Injection System[J].Journal of System Simulation,2009,21(6):1743-1747.(in Chinese)
[12]王凤丽.电控单体泵燃油喷射系统耦合仿真[J].中国工程机械学报,2008,6(2):214-216.Wang Fengli.Coupling Simulation on Fuel Injection System for Single-Unit Electronic-Control Pump[J].Chinese Journal of Construction Machinery,2008,6(2):214-216.(in Chinese)
[13]ROELS P,SLEDSENS Y,VERHELST S.Reducing Engine-Out Emissions for Medium High Speed Diesel Engines:Influence of Injection Parameters[C]//SAE Paper 2009-01-1437.
[14]Huang Yiqun,LEET J.Investigation of In-cylinder NOx and PM Reduction with Delphi E3 Flexible Unit Injectors on a Heavy-Duty Diesel Engine[C]//SAE Paper 2008-01-1792.
[15]冷先银,隆武强,冯立岩,等.喷射率对柴油机性能和排放影响数值模拟研究[J].大连理工大学学报,2011,51(2):181-187.Leng Xianyin,Long Wuqiang,Feng Liyan,et al.Injection Rate on Diesel Engine Performance and Emissions Impact Numerical Simulation Research[J].Journal of Dalian University of Technology,2011,51(2):181-187.(in Chinese)