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

Energies ◽  
2018 ◽  
Vol 11 (9) ◽  
pp. 2342 ◽  
Author(s):  
Cheng-Ta Chung ◽  
Chien-Hsun Wu ◽  
Yi-Hsuan Hung
Keyword(s):  
Energy Efficiency ◽  
Hybrid Systems ◽  
High Speed ◽  
Electric Energy ◽  
Continuously Variable Transmission ◽  
Operating Characteristics ◽  
Power Split ◽  
Variable Transmission ◽  
And Control ◽  
Operating Points

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.

Система дистанційного моніторингу та керування кліматичними параметрами приміщень в процесі промислового виробництва

2020 ◽  
pp. 19-23
Author(s):  
Ігор Бережний ◽  
◽  
Адріан Наконечний ◽  
Keyword(s):  
Energy Efficiency ◽  
Comparative Analysis ◽  
Technological Process ◽  
Remote Monitoring ◽  
High Speed ◽  
Monitoring And Control ◽  
Remote Monitoring And Control ◽  
The Cost ◽  
And Control ◽  
Communication Lines

Based on the research and comparative analysis of existing systems, an algorithm for remote monitoring and control of the technological process using IoT technologies is proposed and developed. We consider a system with flexible algorithms, which combines different data protocols using Wi-Fi technology, which allows you to use this type of system in any industry safely with high speed, energy efficiency and without the cost of communication lines.

A Model-Based Approach to the Estimation and Control of a Continuously Variable Transmission

2020 ◽  
Vol 28 (5) ◽  
pp. 1940-1947 ◽  
Author(s):  
William Dunham ◽  
Jinwoo Seok ◽  
Anouck Girard ◽  
Ilya Kolmanovsky ◽  
Weitian Chen ◽  
...  
Keyword(s):  
Continuously Variable Transmission ◽  
Model Based ◽  
Variable Transmission ◽  
Estimation And Control ◽  
And Control

Power split continuously variable transmission systems with high efficiency

2001 ◽  
Vol 215 (3) ◽  
pp. 357-358 ◽  
Author(s):  
G. Mantriota
Keyword(s):  
Power Flow ◽  
High Efficiency ◽  
Continuously Variable Transmission ◽  
Operating Conditions ◽  
Kinetic Characteristics ◽  
The Past ◽  
Power Split ◽  
Continuously Variable Transmissions ◽  
Variable Transmission ◽  
Functional Solution

Continuously variable transmissions (CVTs) have developed notably in different applications over the past years. This is especially true in the automobile field because of advantages in terms of car handling and efficiency on urban roads. In this work an original functional solution of a power split CVT system is described. The proposed solution allows the generation of a power flow without recirculation. Kinetic characteristics of single-component devices are obtained and the power split CVT system's efficiency is determined by considering how the efficiency of the component devices changes as a function of operating conditions. The advantages for the power split CVT system are therefore shown in terms of power and efficiency in comparison with the single CVT.

scholarly journals Proposing a Method for Assessing Fuel Consumption and Pollutants Emissions with the Use of Continuously Variable Transmission in Town Cars

2021 ◽  
Vol 4 (4) ◽  
pp. 134-140
Author(s):  
Leonardo Serfert Junior ◽  
Thiago B. Muraria ◽  
Lilian Lefol Nani Guarieiro
Keyword(s):  
Energy Efficiency ◽  
Fuel Consumption ◽  
Sustainable Development Goals ◽  
Automatic Transmission ◽  
Continuously Variable Transmission ◽  
The Sustainable Development ◽  
General Government ◽  
Variable Transmission ◽  
Consumption Energy ◽  
Development Goals

The 21st century brings countless social, economic, environmental, and technological challenges to humanity and, to face them, the United Nations (UN) created the Sustainable Development Goals (SDGs). The auto industry, which is part of the private sector, aims to reach them. In this context, this study aims to evaluate the consumption and emissions of pollutants by using an automatic transmission of the CVT (Continuously Variable Transmission) type concerning the automatic transmission of the "Planetary" type. This study will be based on the Consumption/Energy Efficiency tables, published annually by INMETRO (National Institute of Metrology, Quality, and Technology) and whose data will be processed and evaluated using the Quik Sense Software. Thus, the work aims to appraise the advantages of vehicles with automatic transmission of the CVT type about fuel consumption, energy efficiency and emissions, in markets such as Brazil, where these vehicles use ethanol or a mixture of gasoline with up to 27 as fuel % Ethanol. This research can contribute to studies of emission control and approval, benefiting the automotive industry in general, government agencies, the environment, the economy, and society, contributing to the UN's SDGs achievement.

scholarly journals Power Split Based Dual Hemispherical Continuously Variable Transmission

Actuators ◽  
2017 ◽  
Vol 6 (2) ◽  
pp. 15 ◽  
Author(s):  
Douwe Dresscher ◽  
Mark Naves ◽  
Theo de Vries ◽  
Martijn Buijze ◽  
Stefano Stramigioli
Keyword(s):  
Continuously Variable Transmission ◽  
Power Split ◽  
Variable Transmission

Dynamics Analysis and Control of a Holonomic Vehicle With a Continuously Variable Transmission

2000 ◽  
Vol 124 (1) ◽  
pp. 118-126 ◽  
Author(s):  
Karim A. Tahboub ◽  
Harry H. Asada
Keyword(s):  
Dynamic Characteristics ◽  
Impedance Matching ◽  
Gear Ratio ◽  
Continuously Variable Transmission ◽  
Friction Compensation ◽  
Vehicle Stability ◽  
Dynamics Analysis ◽  
Dc Motors ◽  
Variable Transmission ◽  
And Control

This paper presents kinematic and dynamic analysis of a holonomic vehicle with continuously-variable transmission. Four ball wheels, independently actuated by DC motors, enable for moving the vehicle in any direction within the plane and rotating it around its center. The angle between the two beams holding the balls can be changed to alter the gear ratio and other dynamic characteristics of the vehicle. This feature is exploited in augmenting the vehicle stability, optimizing output power, selecting an appropriate gear ratio, and in impedance matching. A simple adaptive friction-compensation-based controller is proposed to handle the complex friction properties.

scholarly journals Convex modeling for optimal battery sizing and control of an electric variable transmission powertrain

2019 ◽  
Vol 74 ◽  
pp. 25 ◽  
Author(s):  
Zetao Ma ◽  
Nikolce Murgovski ◽  
Bo Egardt ◽  
Shumei Cui
Keyword(s):  
Energy Management ◽  
Hybrid Electric Vehicle ◽  
Electric Machines ◽  
Bilevel Program ◽  
Model Control ◽  
Power Split ◽  
Variable Transmission ◽  
Optimal Energy Management ◽  
And Control ◽  
Electric Mode

This paper provides convex modeling steps for the problem of optimal battery sizing and energy management of a plug-in hybrid electric vehicle with an electric variable transmission. Optimal energy management is achieved by a switched model control, with driving modes identified by the engine on/off state. In pure electric mode, convex optimization is used to find the optimal torque split between two electric machines, in order to maximize powertrain efficiency. In hybrid mode, optimization is performed in a bilevel program. One level optimizes speed of a compound unit that includes the engine and electric machines. Another level optimizes the power split between the compound unit and the battery. The proposed method is used to minimize the total cost of ownership of a passenger vehicle for a daily commuter, including costs for battery, fossil fuel and electricity.

scholarly journals Analysis of continuously variable transmission for flywheel energy storage systems in vehicular application

2014 ◽  
Vol 229 (2) ◽  
pp. 273-290 ◽  
Author(s):  
Aditya Dhand ◽  
Keith Pullen
Keyword(s):  
Energy Storage ◽  
High Speed ◽  
Power Flow ◽  
Mechanical Energy ◽  
Storage System ◽  
Continuously Variable Transmission ◽  
Speed Ratio ◽  
Flywheel Energy Storage ◽  
Energy Storage Devices ◽  
Variable Transmission

Energy storage devices are an essential part of hybrid and electric vehicles. The most commonly used ones are batteries, ultra capacitors and high speed flywheels. Among these, the flywheel is the only device that keeps the energy stored in the same form as the moving vehicle, i.e. mechanical energy. In order to connect the flywheel with the vehicle drive line, a suitable means is needed which would allow the flywheel to vary its speed continuously, in other words a continuously variable transmission (CVT) is needed. To improve the efficiency and speed ratio range of the variators, a power spilt CVT (PSCVT) can be employed. This paper discusses the kinematics of PSCVT used to connect the flywheel to the driveline. A methodology describing the characteristic equations of speed ratio, power flow and efficiency of the PSCVT for various types including power recirculating and multi regime in both directions of power flow has been presented. An example of a PSCVT for a flywheel energy storage system (FESS) is computed using the derived equations and the results compared.

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