The Influence of Engine Downsizing in Hybrid Powertrains on the Energy Flow Indicators under Actual Traffic Conditions

Szałek, Andrzej; Pielecha, Ireneusz

doi:10.3390/en14102872

Cited by 10 publications

(9 citation statements)

References 24 publications

(24 reference statements)

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“…The research presented in this paper omits the analysis of exhaust emissions (which, in a fuel cell vehicle, is zero), focusing on the analysis of the energy consumption of a modern propulsion system based on RDE test standards. With this in mind, the authors refer to this test by the acronym RDC (Real Driving Conditions) [39,40]. Due to increasing electrification of vehicles, comparative work on the energy consumption of propulsion is extremely important for the development of the transportation field.…”

Section: Driving Test Evaluationmentioning

confidence: 99%

Fuel Cell Electric Vehicle (FCEV) Energy Flow Analysis in Real Driving Conditions (RDC)

Szałek¹,

Pielecha

Cieślik

2021

Energies

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The search for fossil fuels substitutes forces the use of new propulsion technologies applied to means of transportation. Already widespread, hybrid vehicles are beginning to share the market with hydrogen-powered propulsion systems. These systems are fuel cells or internal combustion engines powered by hydrogen fuel. In this context, road tests of a hydrogen fuel cell drive were conducted under typical traffic conditions according to the requirements of the RDE test. As a result of the carried-out work, energy flow conditions were presented for three driving phases (urban, rural and motorway). The different contributions to the vehicle propulsion of the hydrogen system and the electric system in each phase of the driving route are indicated. The characteristic interaction of power train components during varying driving conditions was presented. A wide variation in the contribution of the fuel cell and the battery to the vehicle’s propulsion was identified. In urban conditions, the share of the fuel cell in the vehicle’s propulsion is more than three times that contributed by the battery, suburban—7 times, highway—28 times. In the entire test, the ratio of FC/BATT use was more than seven, while the energy consumption was more than 22 kWh/100 km. The amounts of battery energy used and recovered were found to be very close to each other under RDE test conditions.

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Section: Driving Test Evaluationmentioning

confidence: 99%

Fuel Cell Electric Vehicle (FCEV) Energy Flow Analysis in Real Driving Conditions (RDC)

Szałek¹,

Pielecha

Cieślik

2021

Energies

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“…The propulsion system of the Toyota Yaris 1.5 Hybrid Dynamic Force e-CVT can be assigned to the group of hybrid series-parallel systems. It is equipped with two electric machines marked with the symbols MG1 and MG2, a 3-cylinder spark ignition engine working according to the Atkinson cycle and a planetary continuously variable transmission [10]. The analysis of energy flow in the hybrid drive system of this vehicle was carried out on the basis of measurements of electric energy received and transmitted by the traction battery and both MG1 and MG2 electric machines.…”

Section: Analysis Of the Operation Of The Hybrid Drive System During Road Testsmentioning

confidence: 99%

Analysis of the operation of the hybrid drive system in the light of the proposed Euro 7 standard

Szramowiat¹,

Szałek²

2021

Combustion Engines

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The article presents the issues of energy recovery in the hybrid drive system of a vehicle Toyota Yaris 1,5 Hybrid. Road tests of a vehicle equipped with a hybrid drive system were carried out in accordance with the recommendations of the RDE test. In these studies, measurements of braking energy recovery were carried out in urban, rural and motorway traffic conditions. The analysis of the obtained test results may constitute a premise for the creation of an appropriate strategy for the operation of the hybrid drive system in terms of meeting the requirements of the currently prepared Euro 7 standard.

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“…The rapid development of battery technology and automobile technology has become a starting point. In addition, the success of the electric vehicle market has been accelerated, as major car manufacturers have reorganized their production around electric vehicles since the "diesel gate" in 2015, when the emission control scandal broke out [1][2][3][4]. According to the International Energy Agency, the number of electric vehicles sold in 2017 was around 1.1 million units, an increase of 54% from the previous year, and as of 2017, the number of global electric vehicles was close to 3.1 million.…”

Section: Introductionmentioning

confidence: 99%

The Structure and Optimal Gear Tooth Profile Design of Two-Speed Transmission for Electric Vehicles

et al. 2021

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As environmental regulations have been strengthened worldwide since the Paris Climate Agreement, the automobile industry is shifting its production paradigm to focus on eco-friendly vehicles such as electric vehicles and hydrogen-battery vehicles. Governments are banning fossil fuel vehicles by law and expanding the introduction of green vehicles. The energy efficiency of electric vehicles that use a limited power source called batteries depends on the driving environment. Applying a two-speed transmission to an electric vehicle can optimize average speed and performance efficiency at low speeds, and achieve maximum speed with minimal torque at high speeds. In this study, a two-speed transmission for an electric vehicle has been developed, to be used in a compact electric vehicle. This utilizes a planetary gear of a total of three pairs, made of a single module which was intended to enable two-speed. The ring gear was removed, and the carrier was used in common. When shifting, the energy used for the speed change is small, due to the use of the simple method of fixing the sun gear of each stage. Each gear was designed by calculating bending strength and surface durability, using JGMA standards, to secure stability. The safety factor of the gears used in the transmission is as follows: all gears have been verified for safety with a bending strength of 1.2 or higher and a surface pressure strength of 1.1 or higher. The design validity of the transmission was verified by calculating the gear meshing ratio and the reference efficiency of the gear. The transmission to be developed through the research results of this paper has a simple and compact structure optimized for electric vehicles, and has reduced shift shock. In addition, energy can be used more efficiently, which will help improve fuel economy and increase drive range.

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The Influence of Engine Downsizing in Hybrid Powertrains on the Energy Flow Indicators under Actual Traffic Conditions

Cited by 10 publications

References 24 publications

Fuel Cell Electric Vehicle (FCEV) Energy Flow Analysis in Real Driving Conditions (RDC)

Fuel Cell Electric Vehicle (FCEV) Energy Flow Analysis in Real Driving Conditions (RDC)

Analysis of the operation of the hybrid drive system in the light of the proposed Euro 7 standard

The Structure and Optimal Gear Tooth Profile Design of Two-Speed Transmission for Electric Vehicles

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