基于Cruise-Isight联合仿真的乘用车变速器速比优化
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摘要
为了在动力性满足目标的前提下进一步提升经济性,建立了Cruise和Isight的联合仿真模型,应用多岛遗传优化方法,在确定的动力性和结构设计约束条件下对变速器的各挡位速比参数进行优化,得出满足性能指标要求的基础优化方案。依据驾驶平顺性和齿轮结构的要求对基础优化方案从工程化的角度进行调整,最终得出满足动力性和工程化要求的工程化可行方案。工程化后的最终方案动力性刚好满足目标要求,NEDC(New European Driving Cycle)循环工况综合油耗比原方案降低0.26 L/100km,经济性改善了3.86%,并且等转速换挡的平顺性较原始方案有所改善。
In order to improve fuel economy further within traction ability target,a Cruise-Isight Co-simulation model is established. By using multi-island genetic algorithm,the transmission gear ratio is optimized separately under certain traction ability and structural design constraints,a basic optimized scheme which can meets performance target is gotten. The gear ratio result from optimization model is adjusted according to drive comfort and structural requirements from the engineering point of view. Finally,the gear ratio is recommended which can meets traction and engineering requirements. After optimization,the traction performance reaches target closely and the integrated fuel consumption of NEDC cycle is reduced by 0. 23 L/100 km,3. 86%lower than the original scheme,and the ride comfort of the constant speed shift is improved also.
In order to improve fuel economy further within traction ability target,a Cruise-Isight Co-simulation model is established. By using multi-island genetic algorithm,the transmission gear ratio is optimized separately under certain traction ability and structural design constraints,a basic optimized scheme which can meets performance target is gotten. The gear ratio result from optimization model is adjusted according to drive comfort and structural requirements from the engineering point of view. Finally,the gear ratio is recommended which can meets traction and engineering requirements. After optimization,the traction performance reaches target closely and the integrated fuel consumption of NEDC cycle is reduced by 0. 23 L/100 km,3. 86%lower than the original scheme,and the ride comfort of the constant speed shift is improved also.
引文
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[2]杜子学,颜溯,刘记君.某重型汽车动力性与燃油经济性仿真与匹配优化[J].汽车技术,2011(10):10-13.
[3]刘宾,孙跃东.基于GT_DRIVE软件的汽车传动系参数对经济性和排放性的影响[J].上海理工大学学报,2014,36(6):571-577.
[4]郝汝林,孙伯.排放试验室动力—传动系匹配试验研究[J].汽车技术,2008(2):46-49.
[5]黄粉莲,纪威,申立中.基于行驶工况的货车动力传动系统优化[J].公路交通科技,2016,33(4):142-147.
[6]钱立军,吴伟岸,赵韩,等.混合动力汽车传动系优化匹配[J].农业机械学报,2005,36(9):5-8.
[7]刘道东,王铁,高昱,等.基于Cruise的某轿车动力传动系统匹配优化与整车性能仿真[J].汽车与配件,2010(40):42-43.
[8]赵艳涛,梵文欣,刘陪杰.Isight在发动机性能参数优化中的应用[J].机械制造与自动化,2009,38(5):26-28.
[9]谢骋,王蠡,任凯.一种面向整车性能分解技术的多目标系统优化设计方法[J].汽车技术,2012(8):24-28.
[10]赖宇阳.Isight参数优化理论与实例详解[M].北京:北京航空航天大学出版社,2012:187-202.
[11]詹樟松,杨正军,刘兴春.汽车动力传动系统参数优化设计和匹配研究[J].汽车技术,2007(3):17-20.
[12]余志生.汽车理论[M].北京:机械工业出版社,2009:78-88.
[13]张俊祥,陈勇,罗大国,等.DCT车辆升挡过程中的扭矩控制[J].汽车技术,2013(8):7-9.