Performance and energy management of a novel full hybrid electric powertrain system

Chung, Cheng Ta; Hung, Yi Hsuan

doi:10.1016/j.energy.2015.05.151

Cited by 29 publications

(9 citation statements)

References 20 publications

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“…PHEV and hybrid electric vehicles (HEV) have basically the same powertrain system architectures. According to the coupling relationship between electrical and mechanical energy, the architectures can be divided into three basic types: Series, parallel and compound, which include various specific deformation structures, as mentioned above [2,[4][5][6]12,14,17,[24][25][26][27][28][29][30][31][32][33][34][35]37,[39][40][41][42][43][44][45][46]51,52]. In order to accurately describe the specific architecture forms, analyze the performance characteristics of the hybrid system, and accurately plan the products' processes for the enterprise, BorgWarner proposed a method based on motor position in the powertrain for representing their product planning, which is widely accepted by the industry and is commonly used to express the detailed architectures of hybrid powertrain systems.…”

Section: Classification Methodsmentioning

confidence: 99%

Comparative Analysis of Technical Route and Market Development for Light-Duty PHEV in China and the US

et al. 2019

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China and the US have become the world's largest plug-in hybrid electric vehicle (PHEV) markets. Powertrain architecture is the framework of PHEV technology which represents its technical route. The research on the market development and technical route of Chinese and American PHEV is helpful to grasp the internal law of the global PHEV market and technology situation, and thus is significant to lay out a development strategy and technical route but has not been sufficiently studied. Therefore, an evaluation method of three dimensions combining market sales, powertrain architectures and performance indexes was proposed for comparative analysis, and PHEV mainstream architectures were put forward. Besides, qualitative evaluation levels from nine dimensions were built for architecture analysis, and fuel consumption to curb weight (FC2CW) as an indicator was introduced for economy evaluation. Some conclusions can be drawn: (a) The most mainstream architecture in sales volume is four-wheel drive (4WD) Bridge, and that in models’ amount is P2 in China, while those respectively are PS and P2 in the US. This reflects that a difference exists between the choice of the consumers and that of the automakers, and another difference also exists between the two countries. (b) With the phasing down of subsidies, the single-motor parallel architecture may become the first choice of China's next technical route, while the 4WD Bridge will still be the main architecture for sports utility vehicles (SUVs) or sports car. (c) Among the models of the top five sales, the types and sales of SUVs in China are significantly more, however, the fuel economy rankings of theirs in the US are relatively better. (d) It is difficult to distinguish which architecture has the absolute best economy, but the fuel economy of the series type in the two markets is not very good.

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Section: Classification Methodsmentioning

confidence: 99%

Comparative Analysis of Technical Route and Market Development for Light-Duty PHEV in China and the US

et al. 2019

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“…The transmission's total speed reduction ratio (i) is the product of the inverse differential gear power splitter speed reduction ratio 2, CVT speed reduction ratio 1.3, and the final transmission speed reduction ratio 3.5, expressed as Equation (11). i = 2 × 1.3 × 3.5 = 9.1 (11) Finally, the theoretical maximum vehicle speed was 103.89 km/h after calculation, which was higher than the measured maximum speed of 94.8 km/h. Thus, the transmission efficiency loss of our HEM was 8.75%, which was caused by the slip loss of the CVT transmission belt.…”

Section: The Response Of the Motorcycle Power Systemmentioning

confidence: 99%

“…UDDS refers to a United States Environmental Protection Agency mandated dynamometer test on fuel economy that represents city driving conditions which is used for light duty vehicle testing. Cheng and Hung [11] proposed a planetary gear set and dual clutch hybrid electric system, and then compared the performance and energy management with a traditional power-split hybrid system. A maximum of 17% fuel economy improvement was obtained/achieved from their findings.…”

Section: Introductionmentioning

confidence: 99%

Development of a Hybrid Electric Motorcycle that Accords Energy Efficiency and Controllability via an Inverse Differential Gear and Power Mode Switching Control

et al. 2019

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In this study, inverse differential gear and power mode switching control were used to develop a hybrid electric motorcycle (HEM). An inverse differential gear power splitter was installed to integrate or distribute the power of an internal combustion engine (ICE), thus achieving single/dual power output. In addition, the transmission system was configured with continuously variable transmission to adjust the transmission speed reduction ratio and stabilize the power output. As a result, three power modes (i.e., the motor drive mode, ICE drive/generator mode, and dual power drive mode) could be switched between each other smoothly. Finally, our HEM was tested by a chassis power gauge. The test results showed that the HEM consumed 41.1% less fuel and produced 58.6% less exhaust emissions compared with conventional ICE motorcycles. In terms of controllability, the acceleration time for 0–100 m was 2.4 s less than the Taiwan E-scooter Standard (TES). The fastest highest vehicle speed was 2.1 times greater than the test of the TES.

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“…One is THS (Toyota Hybrid System) that is widely known and successively implemented in passenger car. The other is PDC (Planetary Gearset and Dual Clutch) that is a novel hybrid proposed in the work of Chung and Hung [20].…”

Section: Classification Of Power Split E-cvtmentioning

confidence: 99%

Effects of Electric Circulation on the Energy Efficiency of the Power Split e-CVT Hybrid Systems

Chung

Hung

2018

Energies

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This paper aims at investigating the fundamental characteristics of energy efficiency for power split electronic-continuously-variable-transmission (e-CVT) hybrid systems under the operation of electric circulation, i.e., circulating part of the engine power through the generator and motor in form of electric energy to improve system efficiency as well as perform the continuously-variable-transmission (CVT) functionality. The relations of kinematics and energy conservation for each power component are constructed and analyzed to classify how the operating points of the engine in term of torque and rotational speed may vary under different degrees of electric circulation indicated by a parameter called ratio of circulating power. Thereby, power split e-CVT hybrid systems can be classified into three types: upward circulation, downward circulation, and neutral circulation. Accordingly, two power split e-CVT hybrid systems, one of input split type and the other of output split type, are selected to be analyzed regarding their operating characteristics and simulated on their performances of energy efficiency. As a result, the former is a type of downward circulation in favor of driving at low speed and high driving load, while the latter is a type of upward circulation with an advantage of driving at high speed and low driving load. Thereby, applying this analysis to investigate the effects of electric circulation on power split e-CVT systems may help the developers implement suitable energy management and control strategy in accordance with their corresponding operating characteristics of energy efficiency.

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Performance and energy management of a novel full hybrid electric powertrain system

Cited by 29 publications

References 20 publications

Comparative Analysis of Technical Route and Market Development for Light-Duty PHEV in China and the US

Comparative Analysis of Technical Route and Market Development for Light-Duty PHEV in China and the US

Development of a Hybrid Electric Motorcycle that Accords Energy Efficiency and Controllability via an Inverse Differential Gear and Power Mode Switching Control

Effects of Electric Circulation on the Energy Efficiency of the Power Split e-CVT Hybrid Systems

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