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动力总成运动空间对动力总成布置的合理性有着重要影响,获取正确的动力总成运动空间,为工程师合理布置发动机舱提供了参考.借助MSC.Adams/View软件建立某轿车动力总成多体动力学模型.考虑到动力总成激励、约束条件和运行工况的影响,实现了对动力总成运动空间的模拟,提供了一种动力总成运动空间的获取方法,并提出了3种动力总成运动空间的描述方式,对比了这3种方法的优缺点,为表达动力总成运动空间提供了建议. 相似文献
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提出了一种基于设定电池组充电曲线的串联式混合动力汽车动力总成滑模控制策略,动力总成控制系统中设置了两个鲁棒性强的固定边界层滑模控制器,分别控制发动机转速和转矩,使发动机工作点处于效率最优区域;同时设计了适当的电池组充电曲线以利于延长电池组寿命.采用ADVISOR软件的仿真结果,验证了提出策略的有效性和相对传统策略的优越性. 相似文献
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<正>对于整车企业来说,形成核心竞争力的第一要素是拥有自己的动力总成,东风商用车公司把动力总成战略视为攸关企业存亡的重要问题。如今,dCi11和4H发动机已经形成稳定上升的销量,作为动力总成重要部分的车桥和变速器纳入东风商用车体系后正在进行系统开发,一个全新的动力总成平台 相似文献
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以某一微型车动力总成3点悬置系统为例,针对汽车的28种载荷工况,对动力总成的质心位移和各悬置点的位移与反力进行了计算,并论述了动力总成悬置系统非线性刚度的设计思想和计算方法. 相似文献
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本文介绍了别克轿车动力总成(即发动机和变速器)及其主要零部件的设计构造、材料、工艺特点、性能和可靠指标,以及动力总成管理系统的工作原理、控制功能和系统配置;阐述了为使发动机适用于中国特定的使用环境而进行的改进设计和匹配工作,尤其是对动力总成控制模块进行的重新标定和试验验证;论述了整车及动力总成60%国产化率的台架试验和整车道路试验论证的技术要求。 相似文献
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以车型系列中动力总成悬置系统的固有特性优化和位移控制为设计要求,以悬置的静刚度和安装位置作为优化变量,提出了在共用一套结构相同的悬置基础上的车型系列动力总成悬置系统固有特性的优化方法.论述了车型系列中动力总成悬置系统的位移控制设计思想,以车型系列中质量最大的动力总成作为基准,设计各个悬置的力-位移特性曲线,然后对其它动力总成悬置的位移进行核算.最后给出了一计算实例,结果表明优化后的同一套结构的悬置在车型系列中各动力总成上均能获得良好的固有频率分布,同时能满足在不同行驶工况下,各个动力总成的位移控制要求. 相似文献
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J. Kim N. Kim S. Hwang Y. Hori H. Kim 《International Journal of Automotive Technology》2009,10(6):733-742
A motor control strategy for an input-split hybrid electric vehicle (HEV) is proposed. From a power characteristic analysis,
it is found that the powertrain efficiency decreases for speed ratios at which power circulation occurs. Using dynamic models
of an input-split HEV powertrain, a motor-generator control algorithm for obtaining high system efficiency is designed by
inversion-based control. The performance of the control algorithm is evaluated by the simulator which is developed based on
PSAT, and simulation results are compared with the test results. It is found that, even if the engine thermal efficiency is
sacrificed by moving the engine operation point from the OOL for the control strategy, improved overall powertrain system
efficiency can be achieved by the engine operation that gives a relatively high efficiency from the viewpoint of the overall
powertrain efficiency. The control algorithm developed can be used in design of future electric vehicles. 相似文献
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D. B. Jung S. W. Cho S. J. Park K. D. Min 《International Journal of Automotive Technology》2016,17(2):339-346
A modified thermostatic control strategy is applied to the powertrain control of a parallel mild hybrid electric vehicle (HEV) to improve fuel economy. This strategy can improve the fuel economy of a parallel mild HEV by operating internal combustion engine (ICE) in a high-efficiency region. Thus, in this study, experiments of a parallel mild HEV were conducted to analyze the characteristics of the hybrid electric powertrain and a numerical model is developed for the vehicle. Based on the results, the thermostatic control strategy was modified and applied to the vehicle model. Also, battery protection logic by using electrochemical battery model is applied because the active usage of battery by thermostatic control strategy can damage the battery. The simulation results of the vehicle under urban driving conditions show that the thermostatic control strategy can improve the vehicle’s fuel economy by 3.7 % compared with that of the conventional strategy. The results also suggest that the trade-off between the fuel economy improvement by efficient ICE operation and the battery life reduction by active battery usage should be carefully investigated when a thermostatic control strategy is applied to a parallel mild HEV. 相似文献
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影响并联混合动力电动汽车发动机在高效区工作的因素 总被引:7,自引:1,他引:7
通过对并联混合动力电动汽车(PHEV)的仿真和对发动机工作点在发动机效率map图中分布情况的分析,研究了影响PHEV的发动机在高效区工作的因素。研究表明:驱动系统能量管理和控制策略对PHEV的发动机在高效区工作的影响最为显著,其次是换挡策略、循环工况以及发动机高效区的位置和分布的影响。 相似文献
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为实现国家"十一五"863重大科研项目——燃料电池城市客车专项的燃料电池城市客车动力性能指标,建立了燃料电池城市客车的整车动力系统结构形式,进而完成新样车的概念设计。对实际目标样车动力驱动系统不同部件(包括电机、变速器、燃料电池、蓄电池)性能参数的合理匹配理论和过程进行了详尽的研究。建立了基于电压控制策略的动力驱动系统仿真模型。仿真结果达到目标样车的动力性能指标,同时建立的仿真模型对进一步深入研究整车控制策略的优化具有重要指导意义。匹配理论和仿真模型对其他类型的电动汽车研究具有一定的参考价值。 相似文献
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四轮驱动燃料电池汽车动力系统参数匹配与优化 总被引:3,自引:0,他引:3
针对某多电机双能源四轮驱动燃料电池汽车动力参数匹配进行了研究。根据其整车结构、行驶工况以及控制策略,对动力系统参数进行初步选择,并以动力系统各部件尺寸最小为目标函数、相应参数为设计变量、整车动力性能为约束条件进行优化计算,得出动力传动系统合理的参数匹配,不仅动力性完全满足设计要求,而且经济性得到提高。 相似文献
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Wet multi-plate friction clutches are used in automotive drivelines to transfer torque, change gears, and prevent motion by
locking-up components in the transmission. The control strategy of starting is a crucial technology for the application of
a wet multi-plate friction clutch in the automotive industry. In this paper, a multi-state fuzzy control strategy for starting
is presented and applied to a continuously variably transmission (CVT) powertrain for the validation of this strategy. The
operation of the clutch was divided into four states: parking, starting, riding and emergency. The starting state was investigated
in detail. A fuzzy algorithm was employed to control the pressure of the hydraulic cylinder acting on the clutch. A distinguishing
feature is that the pressure does not increase but decreases to implement smooth starting during the initial period of starting.
The rapid-control prototype (RCP) of the wet friction clutch was developed to validate the new control strategy onboard a
test vehicle. Based on the experimental results, the multi-state control strategy for a wet friction clutch is a viable candidate
for engineering applications. 相似文献
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为充分发挥一款双电机耦合驱动系统电动汽车(DMCP-EV)多驱动模式的节能优势,制定了基于系统效率最优的驱动模式控制策略。根据该双电机耦合驱动系统的结构特点,定义了电机4种驱动模式并分别建立其动力学驱动模型和系统效率模型。在满足动力性要求的前提下,分析并划分了各驱动模式的工作范围,以系统效率为优化目标,采用粒子群优化算法进行优化,获得最佳的驱动模式切换控制和转矩分配策略。开展了Matlab/Simulink仿真和硬件在环试验验证。结果表明,经系统效率优化的驱动模式在满足动力性要求的前提下,有效提高了双电机耦合驱动系统的经济性,能耗降低11%。 相似文献