电动公交车用增程器起停及切换过程优化
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摘要
基于半实物仿真平台,对增程器起停及切换过程控制策略进行了优化.结果表明:倒拖转矩增大和倒拖终了转速提高后,增程器起动时间降至1.01s;暖机起动过程发动机颗粒排放数量浓度峰值达2.0×10~8个·cm~(-3);停机过程通过发电机加载转矩实现负载停机,转速波动得以明显抑制;采用快速起动和增大增程器输出电功率上升率限值后,整车动力性有所改善;切换过程发动机颗粒排放数量浓度峰值达2.5×10~8个·cm~(-3);发动机调速模式相对发电机调速模式,增程器电功率输出较平缓,但发动机更易偏离最佳油耗曲线.
Based on a semi-physical range extender experimental system,the control strategies of both start/stop and power following of range extender were optimized.Results show:with the increase of motor dragged torque and dragged end speed,the time of start process decreases to 1.01 s,the number of ultrafine particles for warm start is about2.0×10~8 per cm~(-3);during the engine stop with load from generator,the speed fluctuation decreases obviously;with the fast start and the increase of rise limit for range extender output electric power,the bus power performance is improved;the number of ultrafine particles is about 2.5×10~8 per cm~(-3) during swithover process;the power output of engine speed control method is smoother compared with the generator speed control method,but tends to deviate from the optimum fuel consumption curve.
Based on a semi-physical range extender experimental system,the control strategies of both start/stop and power following of range extender were optimized.Results show:with the increase of motor dragged torque and dragged end speed,the time of start process decreases to 1.01 s,the number of ultrafine particles for warm start is about2.0×10~8 per cm~(-3);during the engine stop with load from generator,the speed fluctuation decreases obviously;with the fast start and the increase of rise limit for range extender output electric power,the bus power performance is improved;the number of ultrafine particles is about 2.5×10~8 per cm~(-3) during swithover process;the power output of engine speed control method is smoother compared with the generator speed control method,but tends to deviate from the optimum fuel consumption curve.
引文
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[3]欧阳明高,李建秋,杨福源,等.汽车新型动力系统:构型、建模与控制[M].北京:清华大学出版社,2008.OUYANG Minggao,LI Jianqiu,YANG Fuyuan,et al.Automotive new powertrain:system, model and controls[M].Beijing:Tsinghua University Press,2008.
[4] GUO R,CAO C,MI Y,et al.Experimental investigation of the noise,vibration and harshness performances of a rangeextended electric vehicle[J].Proceedings of the Institution of Mechanical Engineers, Part D:Journal of Automobile Engineering,2015,20(11):13.
[5]曹桂军,闫凤军,李雪峰,等.串联混合动力客车辅助功率单元控制研究[J].汽车工程,2007,29(4):321.CAO Guijun,YAN Fengjun,LI Xuefeng,et al.A study on the control of auxiliary power unit of series hybrid electric bus[J].Automotive Engineering,2007,29(4):321.
[6]李雪峰,郭俊,汪伟,等.带前馈串联式混合动力车辅助动力单元控制方法及装置:102019927B[P].2010-12-14.LI Xuefeng,GUO Jun,WANG Wei,et al.Method and device for controlling auxiliary power unit of tandem hyibrid vehicle with feedforward:102019927B[P].2010-12-14.
[7]孙逸神,程伟.串联混合动力汽车车载供电系统的设计及验证[J].汽车工程,2013,35(3):261.SUN Yishen,CHENG Wei.Design and verification of onboard power supply system for series hybrid electric vehicles[J].Automotive Engineering,2013,35(3):261.
[8]叶冬金.增程式纯电动车动力系统参数匹配及控制策略研究[D].长春:吉林大学,2012.YE Dongjin.Study on parameters design and control strategy for powertrain system of extended-range electric vsehicle[D].Changchun:Jilin University,2012.
[9] HEYWOOD J.Internal combustion engine fundamentals[M].New York:McGraw-Hill Education,1988.
[10] KITTELSON D B.Engines and nanoparticles:a review[J].Journal of Aerosol Science,1998,29(5/6):575.