Comparative Study of Hybrid Vehicle Powertrains with Respect to Energy Efficiency

Kulikov, Ilia; Lezhnev, L. Yu.; Bakhmutov, S V

doi:10.3103/s1052618819010102

Cited by 7 publications

(4 citation statements)

References 6 publications

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“…Delaying the closing time of the intake valves causes the temperature of the mixture to be reduced as well as the load mixture fraction. Consequently, the indicated effective average pressure and net cyclic work is reduced [58]. To solve this issue, a variable valve timing mechanism could be used to increase the efficiency of the Miller cycle [59,60].…”

Section: Miller Cyclementioning

confidence: 99%

Hybrid Electric Vehicles: A Review of Existing Configurations and Thermodynamic Cycles

Japa

Montaleza

Maldonado

et al. 2021

Thermo

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The mobility industry has experienced a fast evolution towards electric-based transport in recent years. Recently, hybrid electric vehicles, which combine electric and conventional combustion systems, have become the most popular alternative by far. This is due to longer autonomy and more extended refueling networks in comparison with the recharging points system, which is still quite limited in some countries. This paper aims to conduct a literature review on thermodynamic models of heat engines used in hybrid electric vehicles and their respective configurations for series, parallel and mixed powertrain. It will discuss the most important models of thermal energy in combustion engines such as the Otto, Atkinson and Miller cycles which are widely used in commercial hybrid electric vehicle models. In short, this work aims at serving as an illustrative but descriptive document, which may be valuable for multiple research and academic purposes.

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Section: Miller Cyclementioning

confidence: 99%

Hybrid Electric Vehicles: A Review of Existing Configurations and Thermodynamic Cycles

Japa

Montaleza

Maldonado

et al. 2021

Thermo

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“…Taking into account the above considerations and the previous studies performed by the authors (see, for example [18]) and other researchers [13,14], it was decided that for this study, the parallel topology would be selected for the analysis of powertrain hybridization.…”

Section: Selection Of the Hybrid Powertrain Topologymentioning

confidence: 99%

Comparative Study of Powertrain Hybridization for Heavy-Duty Vehicles Equipped with Diesel and Gas Engines

et al. 2020

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This article describes a study that aimed to estimate the fuel-saving potential possessed by the hybridization of conventional powertrains intended for heavy-duty vehicles based on diesel and natural gas fueled engines. The tools used for this analysis constitute mathematical models of vehicle dynamics and the powertrain, including its components, i.e., the engine, electric drive, transmission, and energy storage system (ESS). The model of the latter, accompanied by experimental data, allowed for an analysis of employing a supercapacitor regarding the selection of its energy content and the interface between the traction electric drive and the ESS (in light of the wide voltage operating range of supercapacitors). The results revealed the influence of these factors on both the supercapacitor efficiency (during its operation within a powertrain) and the vehicle fuel economy. After implementation of the optimized ESS design within the experimentally validated vehicle model, simulations were conducted in several driving cycles. The results allowed us to compare the fuel economy provided by the hybridization for diesel and gas powertrains in different driving conditions, with different vehicle masses, taking into account the onboard auxiliary power consumption.The complicating aspect of replacing diesel engines with gas engines is the necessity of having an onboard storage for the compressed or liquefied gas, which constitutes a complex system that has its own cost, service, safety, and other issues. Therefore, whether to choose a gas-based vehicle or stay conservative with a diesel-based option becomes a trade-off decision.During the past few years, the National Research Center "NAMI" has been conducting an R&D project in cooperation with one of the country's major producers of heavy-duty vehicles. The project was aimed toward developing a gas-fueled engine family derived from the diesel engine that was newly developed by the aforementioned HD vehicle manufacturer. One can find the details on the project and its results in References [7][8][9]. The main outcomes of the project were the gas-fueled engines (see example in Figure 1) operating with the Otto and Miller thermodynamic cycles. The engines were installed in vehicles intended for long-haul operations (also shown in Figure 1) and tested in road conditions.

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“…Lithium-Ion Batteries with Forced Air Cooling: Simulation and Laboratory Tests developed vehicle with sequential flowchart of hybrid power unit [9], [10] determined the required cumulative capacity of batteries to be about 20 kW*h. While developing high capacity lithium-ion batteries comprised of numerous cells, one of the most important issues is provision of uniformity and sufficiency of their cooling. In the case of excessive heating of single cell, it can fail due to temperature overrun which is extremely dangerous for the battery.…”

Section: Simulation Of Thementioning

confidence: 99%

Lithium-Ion Batteries with Forced Air Cooling: Simulation and Laboratory Tests

Ivanov*,

Velikoretskiy,

Nekrasov

et al. 2019

IJEAT

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Sales and total population of electric vehicles are continuously increasing. Their production and maintenance should be supported by high amount of powerful and reliable battery cells. Various lithium-ion batteries comprise the major part of battery units for vehicles. This article is devoted to development of forced air cooling of battery module for hybrid tractor unit. Cooling of overall module has been significantly improved and temperature fields in all cells have been equalized by means of mathematical simulation. The model adequacy has been verified by laboratory tests of battery module of modified design. Temperature drop between single cells has been decreased more than by four times which reduces significantly probability of local overheating and thermal runaway. In the future the developed battery modules will be used in field tests of tractor unit with hybrid power unit.

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Comparative Study of Hybrid Vehicle Powertrains with Respect to Energy Efficiency

Cited by 7 publications

References 6 publications

Hybrid Electric Vehicles: A Review of Existing Configurations and Thermodynamic Cycles

Hybrid Electric Vehicles: A Review of Existing Configurations and Thermodynamic Cycles

Comparative Study of Powertrain Hybridization for Heavy-Duty Vehicles Equipped with Diesel and Gas Engines

Lithium-Ion Batteries with Forced Air Cooling: Simulation and Laboratory Tests

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