Global Perspective on Electric Vehicle 2020

Agrawal, Manas; Rajapatel, Mohammad Sufiyan

doi:10.17577/ijertv9is010005

Cited by 18 publications

(5 citation statements)

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“…Electric car makers are eagerly awaiting a battery breakthrough that will improve vehicle range as well as the battery life itself. The start-up company Innolith was developing a high-density lithium-ion battery (1000 Wh/kg) that could solve both of these problems [58].…”

Section: Discussionmentioning

confidence: 99%

Tendencies in development of energy assistance systems in an electric car

Augustynowicz¹

2022

Combustion Engines

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As awareness regarding ecology increases among drivers, some characteristics of electric vehicles mean that they attract a greater interest. The basic factors determining the demand for electric cars include their pricing, access to charging stations and the cost per 1 kWh. Considering the above, the aim of this paper is to review the current areas of research into renewable energy sources, such as wind and solar energy and energy derived from vertical displacements of the car body associated with road roughness. The use of such solutions will allow the battery to be charged while the vehicle is in motion and extend the time of travel without stopping the vehicle for charging. The publication forms an overview of findings in the area and the scope of the research reported here relate to the most recent research. For this purpose, reviews of academic and industrial literature were carried out.

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Section: Discussionmentioning

confidence: 99%

Tendencies in development of energy assistance systems in an electric car

Augustynowicz¹

2022

Combustion Engines

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“…Indeed, environmental issues and energy consumption are at the heart of our news. This is why a clean means of transport that does not emit greenhouse gases is at stake worldwide [1].…”

Section: Introductionmentioning

confidence: 99%

“…The complementary nature of traditional and all-electric vehicles emphasizes the need for a compromise that would benefit from their advantages while attempting to eliminate their disadvantages. Vehicles attempting this compromise are called hybrids [1].…”

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confidence: 99%

Development of Electrothermal Models for Electrical Traction

Hanini

Mahfoudhi

Ayadi

2022

WEVJ

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In this paper, improved electrothermal models of the power diode and IGBT have been developed. The main local physical effects have been considered. The proposed models are able to deal with electrical and thermal effects. The models were confirmed by comparison with other models having similar characteristics for different circuits and different temperatures. The developed models are implemented in a traction unit to study the electrothermal performance in an electric vehicle system. The models were implemented in the Pspice circuit simulation platform using standard Pspice components and analog behavior modeling (ABM) blocks. The switching performance of the diode and the IGBT have been studied under the influence of different circuit elements in order to study and estimate the on-state and switching losses pre-required for the design of various topologies of converters and inverters. The comparison shows that these models are simple, configurable with the electrical circuit simulator software. They are better able to predict the main circuit parameters needed for power electronics design. Transient thermal responses have been demonstrated for single pulse and repetition modes. The obtained results show that our model is suitable for a fully electrothermal use of power electronic circuit simulations.

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“…Over the last decades, the internal combustion engine (ICE) research community and manufacturers have been investing very large amount of resources in order to reduce emission levels and increase thermal efficiency of internal combustion engines. 1 But, recently, also hybrid (HEV) or electric vehicles (EV) 2,3 have drawn much attention and resources. The competing technologies will contribute to keep pushing the boundaries of all available technologies, considering the fact that even the more optimistic scenarios for decarbonizing the transportation sector still foresee dominance of energy coming from liquid fuels worldwide up to 2040.…”

Section: Introductionmentioning

confidence: 99%

LES investigation of cycle-to-cycle variation in a SI optical access engine using TFM-AMR combustion model

Zembi

Battistoni

Nambully³

et al. 2021

International Journal of Engine Research

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Multi-cycle large-eddy simulations (LES) are performed to investigate combustion cycle-to-cycle variability (CCV) in a gasoline spark ignited optical access engine operating under homogeneous stoichiometric conditions. Combustion is addressed with the Thickened Flame Model (TFM) and finite rate chemistry is accounted for through a reduced oxidation reaction mechanism. In view of the fact that computational costs of LES engine simulations are still very high today, this work investigates the use of adaptive mesh refinement (AMR) in the flame zone in conjunction with the artificial flame thickening applied by the TFM model. The paper discusses how the resulting coupled TFM-AMR combustion model allows good resolution of the flame, maintaining accuracy at acceptable costs. First, the details of the coupled model are presented and the effects of the parameters are explored, highlighting their impact on the combustion prediction. Then, computational fluid dynamics (CFD) simulation results are validated against experimental data collected in a low-speed low-load engine point, by comparing 20 LES cycles and 100 measured cycles, for mass fraction burned, combustion phasing, flame images and CCV indices. Lastly, a detailed investigation on the fastest and slowest numerical cycles is presented, analyzing instantaneous flame structures, ignition behaviors, propagation speeds, and probability density function (PDF) of the instantaneous velocity fluctuation around the spark region. The results show that combustion variability is highly correlated to the resolved velocity field and the resolved turbulence intensity, which is found to be the main cause of CCV and affects the early flame kernel growth. This work is an early attempt to use TFM-AMR combustion model for LES simulations of internal combustion engines.

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Global Perspective on Electric Vehicle 2020

Cited by 18 publications

References 0 publications

Tendencies in development of energy assistance systems in an electric car

Tendencies in development of energy assistance systems in an electric car

Development of Electrothermal Models for Electrical Traction

LES investigation of cycle-to-cycle variation in a SI optical access engine using TFM-AMR combustion model

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