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首页> 外文期刊>Proceedings of the Institution of Mechanical Engineers, Part D. Journal of Automobile Engineering >Improvement in fuel economy for a parallel hybrid electric vehicle by continuously variable transmission ratio control
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Improvement in fuel economy for a parallel hybrid electric vehicle by continuously variable transmission ratio control

机译：通过无级变速比控制提高并联混合动力电动汽车的燃油经济性

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摘要

A continuously variable transmission (CVT) ratio control algorithm is proposed to achieve the improved fuel economy of the parallel hybrid electric vehicle (HEV) by considering the HEV powertrain response lag. In this algorithm, the target CVT ratio is modified by the vehicle velocity that is estimated after the powertrain response lag. To estimate the vehicle velocity after the response lag, an acceleration map is suggested. The CVT ratio control algorithm is validated by the HEV bench tester. From experimental results, it is found that the engine operation trajectory by the modified ratio control algorithm is shifted to a more efficient region compared with those by the conventional CVT ratio control for the mild acceleration mode, which gives better fuel economy. In addition, performance simulations for the federal urban driving schedule are carried out to evaluate the effect of the response lag on the HEV fuel economy using the HEV powertrain model. The simulation results show that a better fuel economy can be achieved as the response lag used in the modified CVT ratio increases. However, in actual applications, a compromise between the fuel economy and the acceleration performance would be required.
机译：提出了一种无级变速器（CVT）比率控制算法，通过考虑HEV动力总成响应滞后来提高并联混合动力电动汽车（HEV）的燃油经济性。在该算法中，目标CVT比率由动力总成响应滞后后估算的车速修改。为了估计响应滞后后的车速，建议使用加速度图。 CVT比率控制算法已通过HEV台式测试仪进行了验证。从实验结果可以看出，与常规CVT比率控制相比，改进的比率控制算法将发动机运行轨迹转移到更有效的区域，从而实现了更好的燃油经济性。此外，针对联邦城市驾驶时间表进行了性能模拟，以使用HEV动力总成模型评估响应滞后对HEV燃油经济性的影响。仿真结果表明，随着改进的CVT比率中使用的响应滞后的增加，可以实现更好的燃油经济性。然而，在实际应用中，将需要在燃料经济性和加速性能之间折衷。

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