共查询到20条相似文献,搜索用时 171 毫秒
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秦大同杨官龙刘永刚林毓培 《汽车工程》2015,(12):1366-1370
基于插电式混合动力汽车(PHEV)可以通过外网充电的特性,选取发动机消耗燃油的成本与电机消耗电能的成本之和作为优化目标函数,采用庞特里亚金极小值原理进行优化仿真;研究了PHEV不同工作模式(电量消耗-电量维持模式和混合模式)对能耗经济性的影响;分析了行驶里程、电池荷电状态(SOC)初始值和能量价格比对能量分配控制策略的影响;最终制定了实时优化控制策略并与门限值控制策略进行对比仿真,结果表明,与门限值控制策略相比,采用制定的实时优化控制策略能耗经济性在不同的SOC初始值下都有大幅度的提高。 相似文献
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并联式混合动力电动汽车动力总成控制器硬件在环仿真 总被引:3,自引:1,他引:3
通过对EQ6110并联式混合动力城市客车的动力总成系统结构和控制系统的分析,研制开发了用于并联式混合动力电动汽车(PHEV)的动力总成控制器设计开发的硬件在环仿真系统;详细介绍了动力总成各个部件仿真模型的建立,包括发动机模型、电机模型、动力电池模型以及传动系统模型等;通过Matlab/Simulink的建模,运用dSPACE实时计算系统成功地构建了PHEV多能源动力总成控制器的硬件在环仿真系统;最后进行了PHEV动力总成控制器硬件在环仿真的测试试验研究。 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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In this study, a control strategy for a dual mode power split-type hybrid electric vehicle (HEV) is developed based on the powertrain efficiency. To evaluate the transmission characteristics of the dual mode power split transmission (PST), a mechanical loss model of the transmission (TM loss) is constructed. The transmission efficiency, including the TM loss, is evaluated for the dual mode PST. Two control strategies for the dual mode PST are proposed. An optimal operation line (OOL) control strategy is developed to maintain a high engine thermal efficiency by controlling the engine operation point on the OOL. A speed ratio (SR) control strategy is proposed to obtain a greater transmission efficiency by shifting the engine operation point when the dual mode PST operates near the mechanical points. Using the TM loss and the proposed control strategies, a vehicle performance simulation is conducted to evaluate the performance of the two control strategies for dual mode PST. The simulation results demonstrate that, for the SR control strategy, the engine efficiency decreases because the engine operates beyond the OOL. However, the transmission efficiency of the dual mode PST increases because the PST operates near the mechanical point where the PST shows the greatest transmission efficiency. Consequently, the fuel economy of the SR control strategy is improved by 3.8% compared with the OOL control strategy. 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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《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2012,50(2):199-227
An energy management control strategy for a parallel hybrid electric vehicle based on the extremum-seeking method for splitting torque between the internal combustion engine and electric motor is proposed in this paper. The control strategy has two levels of operation: the upper and lower levels. The upper level decision-making controller chooses the vehicle operation mode such as the simultaneous use of the internal combustion engine and electric motor, use of only the electric motor, use of only the internal combustion engine, or regenerative braking. In the simultaneous use of the internal combustion engine and electric motor, the optimum energy distribution between these two sources of energy is determined via the extremum-seeking algorithm that searches for maximum drivetrain efficiency. A dynamic programming solution is also obtained and used to form a benchmark for performance evaluation of the proposed method based on extremum seeking. Detailed simulations using a realistic model are presented to illustrate the effectiveness of the methodology. 相似文献
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汽车发动机与传动系联合操纵的研究 总被引:1,自引:0,他引:1
为实现电控机械式自动变速系统的统一控制,本文展开了以下三个方面的研究:首先,为该系统建立了一种最佳变速特性曲线;其次,为其加速踏板设计了一种稳定实用的踏板工作曲线;最后,通过动力分析,确定了在换档过程中,系统各总成应采取的控制策略。 相似文献
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建立了电动汽车增程器系统的模块化控制仿真平台。将GT-Power中的接口模块与Simulink模块建立耦合模型,进一步通过Matlab/Simulink建立转速控制和空燃比控制模型,研究了增程发动机冷起动及稳定运行时转速和空燃比的控制策略,对比了传统 PID控制方法以及模糊 PID控制方法。结果表明,模糊 PID控制在目标转速以及空燃比的响应速度和误差方面均优于传统 PID 控制;稳定运行时,增程发动机转速保持在最佳工况点 3 000 r/min 附近,实现发动机高效节能。 相似文献
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