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Performance evaluation and optimization of a novel plug‐in power‐reflux hybrid electric vehicle powertrain
International Journal of Energy Research ( IF 4.3 ) Pub Date : 2020-02-05 , DOI: 10.1002/er.4959
Guanlong Sun 1 , Dongye Sun 1 , Junlong Liu 1 , Ke Ma 1
Affiliation  

In order to improve the fuel economy of hybrid electric vehicles, a novel plug‐in power‐reflux hybrid electric vehicle powertrain equipped with an electromechanical control continuously variable transmission (EMCVT) is proposed in this study. The proposed structure, which combines the dynamic property of the planetary mechanism and regulating characteristics of the continuous speed ratio with EMCVT, can transmit power in two modes, namely power‐reflux mode and pure‐CVT mode, thus realizing the multistage design of the overall transmission system. Hence, it demonstrates a wider speed ratio variation range and higher transmission efficiency than the “Pathfinder‐like” parallel configuration with traditional electro‐hydraulic CVT (EHCVT). To take full advantage of its potential for fuel economy, the highest transmission efficiency of the system is taken as the optimization objective for the target speed ratio of the system. The optimization results are incorporated in the control strategy based on Pontryagin's minimum principle to simulate fuel consumption under the new European driving cycle (NEDC), highway fuel economy test (HWFET), and urban dynamometer driving schedule (UDDS). Compared with the simulation of the “THS II‐like” configuration with similar vehicular parameters, the results show that the novel configuration has better fuel economy.

中文翻译:

新型插电式混合动力混合动力电动汽车动力总成的性能评估和优化

为了提高混合动力汽车的燃油经济性,本研究提出了一种新型的插电式动力回流混合动力电动汽车动力总成,该动力总成配备了机电控制无级变速器(EMCVT)。所提出的结构结合了行星机构的动态特性和使用EMCVT的连续速比调节特性,可以以两种模式传输功率,即功率回流模式和纯CVT模式,从而实现了整体的多级设计。传输系统。因此,与传统的电动液压CVT(EHCVT)相比,“ Pathfinder-like”并联配置具有更宽的速比变化范围和更高的传动效率。为了充分利用其节省燃油的潜力,以系统的最高传动效率为目标速度比的优化目标。优化结果被纳入基于Pontryagin最小原理的控制策略中,以模拟新欧洲行驶周期(NEDC),高速公路燃油经济性测试(HWFET)和城市测功机行驶时间表(UDDS)下的燃油消耗。与具有类似车辆参数的“ THS II-like”配置的仿真相比,结果表明该新型配置具有更好的燃油经济性。和城市测功机驾驶时间表(UDDS)。与具有类似车辆参数的“ THS II-like”配置的仿真相比,结果表明该新型配置具有更好的燃油经济性。和城市测功机驾驶时间表(UDDS)。与具有类似车辆参数的“ THS II-like”配置的仿真相比,结果表明该新型配置具有更好的燃油经济性。
更新日期:2020-02-05
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