scholarly journals Experimental Research on Braking Feedback and Taxiing Feedback System of New Energy Vehicles

2021 ◽  
Vol 11 (23) ◽  
pp. 11093
Author(s):  
Ning Li ◽  
Yingshuai Liu ◽  
Siyuan Tan
Keyword(s):  
Control Strategy ◽  
Energy Recovery ◽  
Feedback System ◽  
Energy Feedback ◽  
Feedback Mode ◽  
Electric Bus ◽  
New Energy ◽  
New Energy Vehicle ◽  
The Impact ◽  
Braking Energy Recovery

This paper took a new energy vehicle feedback system as the research object, aiming to study the energy recovery law of the new energy vehicle under braking feedback and taxiing feedback conditions. Firstly, the braking energy feedback control strategy and different forms of taxiing energy feedback were studied. Then the integration and application of braking energy recovery system were carried out on a pure electric bus and a hybrid electric bus, with each vehicle model corresponding to different integration and test schemes, which provided a guarantee for the relevant test of real vehicle environments. Finally, relevant vehicle experiments were carried out to test the impact of superposition and coordination strategies on the contribution rate of braking energy recovery under a typical Chinese city bus circle and compared the difference in vehicle energy consumption with and without taxi feedback strategy. The test results showed that the coordinated braking energy recovery control strategy can make more effective use of the maximum torque that can be fed back by the motor, and the fuel consumption of the taxiing feedback mode was lower than that of the no taxiing feedback mode under different driving conditions.

scholarly journals System Dynamics Model for the Evolutionary Behaviour of Government Enterprises and Consumers in China’s New Energy Vehicle Market

2020 ◽  
Vol 12 (4) ◽  
pp. 1578 ◽  
Author(s):  
Hongxia Sun ◽  
Yao Wan ◽  
Huirong Lv
Keyword(s):  
System Dynamics ◽  
Motor Vehicle ◽  
Replicator Dynamics ◽  
Evolutionary Game ◽  
Practical Significance ◽  
Subsidy Policy ◽  
New Energy ◽  
New Energy Vehicle ◽  
The Impact ◽  
Vehicle Market

Exhaust pollution and energy crises are worsening worldwide. China has become the largest motor vehicle producer; thus, promoting the use of new energy vehicles (NEVs) in China has important practical significance. In this paper, considering the limited rationality of governments, NEV enterprises and consumers, we study the subsidy policy of the China NEV market using the evolutionary game and system dynamics (SD) methods. First, a tripartite evolutionary game model is developed and the replicator dynamics equations and Jacobian matrix are obtained. A SD simulation of the model was conducted to further clarify the impact of the initial market proportion and three variables used in the model. The results show that the initial market proportion affects the evolution speed but does not affect the evolution result when the three group players all choose a mixed strategy. For governments, they should not hastily cancel price subsidies provided to consumers; rather, they should dynamically adjust the rate of the subsidy decrease and increase the consumers’ extra cost for purchasing fuel vehicles (FVs). NEV enterprises should appropriately increase their investments in the research and development (R&D) of NEVs.

scholarly journals The impact of the reduction of consumption subsidies on the industrial chain of new energy vehicles

2021 ◽  
Vol 235 ◽  
pp. 01002
Author(s):  
Xiaohua Mao
Keyword(s):  
Chinese Government ◽  
Industry Chain ◽  
Industrial Chain ◽  
New Energy ◽  
New Energy Vehicle ◽  
Using Data ◽  
The Impact ◽  
D Investment ◽  
Vehicle Market ◽  
New Energy Vehicles

In recent years, in order to promote the independent development of the new energy vehicle industry, Chinese government has decided to reduce the consumption subsidies for new energy vehicles until the subsidies are completely withdrawn. The reduction of consumption subsidy has a great impact on the production and sales of new energy vehicles in the whole vehicle market. However, does the reduction of this subsidy also have an impact on other enterprises in the new energy vehicles industry chain? This paper tests this problem using data from 2016 to 2018, and finds, through empirical analysis, that during the period of subsidy decline, the profitability of component enterprises is significantly positively correlated with this subsidies, while the r&d investment of enterprises is significantly negatively correlated with this subsidies. The results show that in terms of profitability, the reduction of consumer subsidies not only has an impact on the whole vehicle industry of new energy vehicles, but also has an adverse impact on the core component companies in the industrial chain. However, in terms of r&d, the reduction of subsidies has more negatively strengthened the input and attention of R&D in component companies.

scholarly journals Research on braking energy recovery strategy of electric vehicle based on ECE regulation and I curve

2019 ◽  
Vol 103 (1) ◽  
pp. 003685041987776 ◽  
Author(s):  
Shengqin Li ◽  
Bo Yu ◽  
Xinyuan Feng
Keyword(s):  
Electric Vehicle ◽  
Control Strategy ◽  
Energy Recovery ◽  
State Of Charge ◽  
Regenerative Braking ◽  
Force Distribution ◽  
Battery State Of Charge ◽  
Braking Force ◽  
Braking Control ◽  
Braking Energy Recovery

Electric vehicles can convert the kinetic energy of the vehicle into electric energy for recycling. A reasonable braking force distribution strategy is the key to ensure braking stability and the energy recovery rate. For an electric vehicle, based on the ECE regulation curve and ideal braking force distribution (I curve), the braking force distribution strategy of the front and rear axles is designed to study the braking energy recovery control strategy. The fuzzy control method is adopted while the charging power limit of the battery is considered to correct the regenerative braking torque of the motor, the ratio of the regenerative braking force of the motor to the front axle braking force is designed according to different braking strengths, then the braking force distribution and braking energy recovery control strategies for regenerative braking and friction braking are developed. The simulation model of combined vehicle and energy recovery control strategy is established by Simulink and Cruise software. The braking energy recovery control strategy of this article is verified under different braking conditions and New European Driving Cycle conditions. The results show that the control strategy proposed in this article meets the requirements of braking stability. Under the condition of initial state of charge of 75%, the variation of state of charge of braking control strategy in this article is reduced by 8.22%, and the state of charge of braking strategy based on I curve reduces by 9.12%. The braking force distribution curves of the front and rear axle are in line with the braking characteristics, can effectively recover the braking energy, and improve the battery state of charge. Taking the using range of 95%–5% of battery state of charge as calculation target, the cruising range of vehicle with braking control strategy of this article increases to 136.64 km, which showed that the braking control strategy in this article could increase the cruising range of the electric vehicle.

scholarly journals Research on the Development of New Energy Vehicle Sharing in China Based on the Concept of Green Travel

2020 ◽  
Vol 165 ◽  
pp. 01024
Author(s):  
Anqi Lv ◽  
Zhiqiang Zhu ◽  
Guohua Cheng ◽  
Yi Jia ◽  
Ling Shi
Keyword(s):  
Pollution Prevention ◽  
Development Trend ◽  
Urban Traffic ◽  
Low Carbon ◽  
Transport Service ◽  
Transportation Equipment ◽  
New Energy ◽  
Urbanization In China ◽  
New Energy Vehicle ◽  
The Impact

As the urbanization in China is accelerating, “urban diseases” such as city congestion and environmental pollution arise. Traffic is one of the important factors leading to such urban problems. Therefore, in order to succeed in pollution prevention and control, overcome the shortcomings in urban traffic, and realize high-quality development of transport service, we should promote the development of green transport based on low carbon and environmental protection, and intensively implement green travel. First of all, we should accelerate the upgrading of transportation equipment technology, speed up the promotion and application of new energy vehicles in the field of car sharing, and promote the green and low-carbon development of transport service. Based on it, this paper first defines the green travel, new energy vehicle sharing and other related concepts, and analyzes the impact of new energy vehicle sharing, and then sorts out the development process of new energy vehicle sharing in China and analyzes the development trend and problems being confronted with in this field, and finally puts forward the development policy suggestions on domestic new energy vehicle sharing.

scholarly journals The Impact of Financial Support on Innovation Efficiency of Government Subsidies From the Perspective of DEA-Tobit——An Empirical Study Based on Chinese New Energy Vehicle Enterprises

2021 ◽  
Author(s):  
Sha Zhang ◽  
Fang Chen
Keyword(s):  
Financial Support ◽  
Negative Impact ◽  
Positive Impact ◽  
Reference Value ◽  
Chinese Government ◽  
Operating Cycle ◽  
Government Subsidies ◽  
New Energy ◽  
New Energy Vehicle ◽  
The Impact

Abstract The new energy vehicle enterprises is a strategic emerging industry in China, so more and more government subsidies to promote innovative development are being accepted by new energy vehicle enterprises. What is the innovation efficiency of new energy vehicle enterprises receiving government subsidies? With the acceleration of the process of global economic financialization, whether financial support can promote the innovation efficiency of government subsidies and how enterprises should allocate financial assets have become issues that need to be deeply considered. Based on the annual report data of China's domestic listed new energy vehicle enterprises from 2015 to 2020, the relationship between government subsidies and enterprise innovation efficiency is empirically tested, and the impact of financial support on enterprise R&D innovation efficiency is investigated. The empirical results show that government subsidies are wasteful and fail to effectively promote R&D innovation, and the innovation efficiency of government subsidies is positively influenced by firm nature and firm age, while the total asset turnover ratio, operating cycle and firm size have a negative impact on innovation efficiency. Further research found that there is an inverted U-shaped relationship between financial support and the innovation efficiency of government subsidies. A certain degree of financial support has a positive impact on the innovation efficiency of government subsidies, but excessive financial support has a negative impact on the innovation efficiency of government subsidies. The conclusion provides empirical evidence for the Chinese government to improve the subsidy policy and standardize the development of new energy vehicle enterprises, and has a certain reference value for guiding new energy vehicle enterprises to reasonably allocate financial support.

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