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Simulation studies of hybrid powertrain for urban vehicles

Lechowicz A., Augustynowicz A.

Journal of KONES

2017

Vol. 24, No. 4

149--156

The powertrain of an urban vehicle was subjected to detailed simulations. This study was conducted with the aim of getting to know the operating principle, verification of assumptions adopted during its design and determination of most effective control procedures to be applied with regard to its powertrain. However, the most important aspect involved the aspect of the power distribution between the engines, electrical machine and vehicle wheels in the particular operating modes of the powertrain. A study was conducted in the MATLAB/Simulink environment with the purpose of finding a configuration of an electrical machine coupling with a combustion engine that offers the greatest advantages in terms of the range of the speed ratio, demanded performance of the electrical machine and maximum power output. The simulations indicated that control of the speed ratio of the vehicle could be gained by application of an electrically controlled planetary gear. The range of the transmission ratio is relative to the ratio of the planetary gear, speed range of the combustion engine as well as electrical machine. The efficiency of the battery charging in the hybrid mode is mostly relative to the operating point of the engine. The optimization of the process of power generation by the electrical machine requires that the operating point of the engine be maintained at a range at which its high performance is guaranteed.

Research of Integrated Control Methods and its Simulation for Freeway Mainline and Related Ramp

Chen F., Jia Y., Li J.

Przegląd Elektrotechniczny

2012

R. 88, nr 1b

119-122

To relieve traffic congestion during peak hours on freeways, various ramp metering models have been attempted for regulation of the inputs to freeway from entry ramps. Integrated control is a new development to find the combination of control measures for the best road performance and control effectiveness. In consideration of some weaknesses of current intelligent metering, this study proposes an innovative concept and associated local ramp metering approach. From results of a comparative case study with real world traffic flow data in Beijing, the new Intelligent control approach of freeway mainline and related ramp that is proven to significantly output from traditional models, particularly in regards to its effectiveness in minimizing the waiting time of multiple cycles.

W artykule przeanalizowano słabości obecnie stosowanych metod do kontroli przepełnienia w czasie ruchu drogowego i zaproponowano nowa metodę oceny zwalniania tego ruchu. Zaproponowano też inteligentne metody kontroli tego ruchu w tym wjazdu na autostrady.