A novel coaxial multi-mode hybrid transmission system for mining trucks

2018 ◽  
Vol 233 (10) ◽  
pp. 2492-2501
Author(s):  
Weiwei Yang ◽  
Jue Yang ◽  
Nong Zhang
Keyword(s):  
Fuel Consumption ◽  
Hybrid System ◽  
High Speed ◽  
High Efficiency ◽  
Planetary Gear ◽  
Transmission System ◽  
Energy Management Strategy ◽  
Parallel Transmission ◽  
Transmission Structure ◽  
Multi Mode

Given that hybrid electric vehicles could significantly reduce fuel consumption, and mining trucks are much more sensitive to energy conversion efficiency, it is essential to develop a hybrid system, which could meet both the specific requirements of the structure of mining trucks and the needs for overall efficiency improvements. In this paper, a novel multi-mode transmission system, which is composed of an engine, two motors, one planetary gear set, and a parallel transmission structure, is proposed. The planetary gear set serves as a power-split device, and the parallel transmission structure can make the engine and motor work in the high-efficiency area both in low-speed and high-speed conditions. Due to the flexibility of the proposed system, five power-flow modes can be implemented, and they are illustrated with a specially designed rule-based energy management strategy. To validate the effectiveness of the multi-mode transmission system, dynamic programming is used to assess the fuel consumption during the given driving cycle without considering drivability. The simulation results reveal that the proposed multi-mode transmission system owns better fuel efficiency for mining trucks compared with highly regarded Toyota Hybrid System and conventional automated manual transmission system.

Investigation of Hybrid Fuel Cell (HFC) Technology Applications on the Future Passenger Railroad Transportation

Joint Rail ◽  
2003 ◽  
Author(s):  
H. Moghbelli ◽  
Y. Gao ◽  
R. Langari ◽  
M. Ehsani
Keyword(s):  
Fuel Consumption ◽  
Fuel Economy ◽  
High Speed ◽  
High Efficiency ◽  
New Technologies ◽  
Positive Impact ◽  
Weak Link ◽  
Transportation System ◽  
Production Costs ◽  
Passenger Railroad

Due to the consideration of fragile security, and longer check-in times and inconveniences due to increased air travel security examination since September 11th 2001, more and more people have turn to ground transportation. Unfortunately, the inefficient, environment-unfriendly and unsafe passenger cars and buses are the only choices available for middle distance trips. Development of high efficiency, clean and high speed railroad passenger transportation system has become more necessary to overcome this weak link. In this paper, the applicability of hybrid drive train technologies for middle-distance passenger train locomotives will be investigated. A systematic design of the diesel based hybrid locomotive helps to increase efficiency, improve fuel economy, reduce emissions and also reduce mass production costs. Furthermore, professional management and maintenance of railroad train locomotives make such new technologies more practical than for road vehicles. The success of such transportation system will have a great positive impact on our social activities, quality of life, energy supply, environment and economy. A diesel based hybrid electric locomotive (HEL) with batteries or an ultracapacitor is an option to reduce fuel consumption and emissions and provide better performance and fuel economy. The reduced fuel consumption helps reduce the amount of pollutants released. Engineering estimation indicate that emissions will be reduced by 70% and fuel efficiency will be increased by at least 30% in hybrid locomotives.

The Gear Bearing Drive: A Novel Compact Actuator for Robotic Joints

2013 ◽  
Author(s):  
Elias Brassitos ◽  
Constantinos Mavroidis ◽  
Brian Weinberg
Keyword(s):  
High Speed ◽  
High Efficiency ◽  
Low Cost ◽  
Planetary Gear ◽  
Mechanical Efficiency ◽  
Torsional Stiffness ◽  
Maximum Output ◽  
Torque Density ◽  
Robotic Joints ◽  
Advanced Robotics

Advanced robotics requires a new generation of actuators able to exhibit a number of desirable characteristics ranging from high power density and high efficiency, high positioning resolution, high torque capacity and torsional stiffness, lightweight designs and low-cost packages. In this paper, we present the development and the experimental evaluation of a new actuator, aimed at improving the torque density and mechanical efficiency of actuated robotic joints, and enhancing the portability and effectiveness of robotic systems engaged in biomechanical applications such as rehabilitation robots and wearable exoskeletons. The new actuator, called the Gear Bearing Drive (GBD), consists of a two-stage planetary gear arrangement coupled through the planets and driven by an external rotor brushless motor that is inscribed within the input stage sun gear. This planetary configuration enables for incredible high-speed reductions and allows for embedding the motor directly within the gearbox saving significant space on the actuator length. Our initial experimental prototypes have demonstrated impressive performance with the potential to deliver more than 30Nm of continuous torque with 85% mechanical efficiency and 0.0005 degree of backlash, and up to 200 rpm maximum output speed in a highly compact and robust package.

Property study of power transmission system for rotary ultrasonic application

2016 ◽  
Vol 232 (2) ◽  
pp. 305-315
Author(s):  
Wu Chenjun ◽  
Chen Shijin ◽  
Cheng Kai ◽  
Ding Hui
Keyword(s):  
High Speed ◽  
High Efficiency ◽  
Power Transmission ◽  
Transmission System ◽  
Ultrasonic Power ◽  
Power Transmission System ◽  
Compensation Methods ◽  
Transmission Part ◽  
Hard And Brittle Materials ◽  
Hollow Copper

Rotary ultrasonic applications are being widely used in machining hard and brittle materials. Conventional conducting ring used as power transmission part limits the ultrasonic applications from rotating at high speed. A high efficiency power transmission system is defined in this article to solve this problem. It consists of a contactless transformer, which was made up of two hollow copper coils, ultrasonic power supply and compensation capacitors. Four compensation methods are proposed and their properties are analyzed through simulations and experiments. The simulations show that S-S compensation is superior to others on the performance of transient and steady circuit parameters and the max transmit efficiency can reach about 97.2% when appropriate compensation method and capacitance are used. Rotary experiments show that speed has little effect on the property of the system.

scholarly journals The Use Of Microturbines as an Energy Converter For Motor Transport

2019 ◽  
Vol 8 (10) ◽  
pp. 2700-2703
Keyword(s):  
Fuel Consumption ◽  
High Speed ◽  
Internal Combustion Engines ◽  
High Efficiency ◽  
Mechanical Energy ◽  
Electrical Energy ◽  
Motor Vehicles ◽  
Turbine Engine ◽  
Range Extender ◽  
Traction Motors

At this stage of the development of vehicles with a combined power plant, one of the areas of development is the study of the introduction of a low-power gas turbine engine, the so-called microturbine, as a converter of thermal energy into mechanical. This solution has numerous positive aspects related to its fuel consumption, small dimensions, high efficiency, as well as a number of performance indicators. In this case, the vehicle is also equipped with a high-speed generator with the goal of converting the mechanical energy of the microturbine into electrical energy. This ensures the microturbine operation in a given range on the characteristic of optimal fuel consumption. The article contains an analysis of the use of microturbine generators in vehicles; some constructive solutions are considered as well. An overview of vehicles with microturbine generators and their comparison with traditional internal combustion engines is given. The movement of the vehicle is carried out by one or several traction motors. More than ten developments of motor vehicles using the microturbine as an additional source of energy for vehicles with traction electric drive are already known in the world, including MiTRE (Microturbine Range Extender). Among such vehicles, one can name the Trolza "Ecobus" buses, Delta Hypercar supercar, Isuzu NPR trucks, Mack Truck, Kenworth.

scholarly journals Developing Equivalent Consumption Minimization Strategy for Advanced Hybrid System-II Electric Vehicles

Energies ◽  
2020 ◽  
Vol 13 (8) ◽  
pp. 2033
Author(s):  
Hsiu-Ying Hwang
Keyword(s):  
Fuel Consumption ◽  
Electric Vehicles ◽  
Hybrid System ◽  
Fuel Economy ◽  
High Energy ◽  
Energy Management Strategy ◽  
Engine Operation ◽  
Rule Based ◽  
Simulation Results ◽  
Equivalent Consumption Minimization Strategy

Compared with conventional vehicles, hybrid electric vehicles (HEVs) have the advantage of high-energy conversion efficiency, which can have better fuel economy and lower emissions. The main issue of HEVs is how to develop an energy management strategy to achieve significantly better fuel efficiency. In this research, the Equivalent Consumption Minimization Strategy (ECMS) was applied to optimize the performance of fuel consumption in the Advanced Hybrid System-II (AHS-II). Based on FTP-75 Test Procedure defined by the U.S. Environmental Protection Agency (EPA), a backward simulation module was established. The baseline simulation module with the rule-based control strategy was validated with the original fuel consumption data. Then, the module with ECMS followed the same control rules of engine on/off and mode selection, and the fuel consumption of ECMS was compared with the simulation results of the baseline model. The fuel economy improvements of ECMS in urban, highway driving pattern, and composite fuel economy were up to 8.5%, 7.7%, and 8.1%, respectively. The simulation results showed that the difference of motors’ working efficiency was only 1.2% between ECMS and baseline rule-based control strategies. The main reason of fuel consumption improvement was the engine operation chosen by ECMS, which provided better power distribution.

Flywheel Based Mechanical Hybrid System: Simulation of the Fuel Consumption Benefits of Various Transmission Arrangements and Control Strategies

2010 ◽  
Author(s):  
Chris Brockbank ◽  
Will Body
Keyword(s):  
Fuel Consumption ◽  
Hybrid System ◽  
High Speed ◽  
Control Strategies ◽  
Drive System ◽  
Advanced Technology ◽  
Direct Drive ◽  
Consumption Benefits ◽  
Final Drive ◽  
The Impact

Flywheel based mechanical hybrid technology is under development for Motorsport, Automotive and Commercial Vehicle applications. Originally a European development, North American mechanical hybrid applications are now underway. The mechanical hybrid system recovers kinetic energy from the vehicle during braking to a high-speed, rotating flywheel via a variable drive system. When compared to an electric motor / battery arrangement, the mechanical hybrid system offers benefits in cost, weight, package, efficiency and ultimately fuel consumption. A number of UK Government funded projects applying flywheel based mechanical hybrid systems are ongoing, developing the technology and building mechanical hybrid equipped demonstrator vehicles. Participants include OEM’s Jaguar Land Rover, Ford, JCB and Optare using advanced technology from Allison Transmission Inc, Flybrid Systems, Ricardo, SKF and Torotrak. The Torotrak torque controlled, variable drive technology is a key component within the mechanical hybrid system. As part of the development process, all aspects of the mechanical hybrid system are under investigation (such as the required energy storage, rates of energy recovery, etc) including the variety of different physical architectures for the variable drive system. Multiple configuration options are available including direct drive, epicyclic shunted, range extended CVT and epicyclic shunted IVT arrangements. In addition, the flywheel and variable drive system can be connected to the powertrain in a variety of different locations from engine to transmission to final drive. This paper describes the simulation of the mechanical hybrid system with focus on the impact on the fuel consumption benefit, over multiple drive cycles, of the variable drive configuration, the location of the variable drive & flywheel system and the control strategy options.

scholarly journals Saving Hydrogen Fuel Consumption and Operating at High Efficiency of Fuel Cell in Hybrid System to Power UAV

2021 ◽  
Vol 10 (1) ◽  
pp. 32-42
Author(s):  
Baba Omar ◽  
Al Savvaris ◽  
Rahil O ◽  
Abdulhadi ◽  
Muhammad Khairul Afdhol ◽  
...  
Keyword(s):  
Fuzzy Logic ◽  
Fuel Cell ◽  
Fuel Consumption ◽  
Hybrid System ◽  
Fuzzy Logic Controller ◽  
High Efficiency ◽  
Propulsion System ◽  
Hydrogen Fuel ◽  
Optimal Point ◽  
Hybrid Propulsion

The present fuel cell technology is under considerations as a potential power source for Unmanned Aerial Vehicles. Fuel cells are an electrochemical power plant that takes hydrogen and oxygen as inputs and produces electricity, water and heat as outputs.  Most of the global hydrogen production is from non-renewable fossil fuels. Therefore, this paper investigates how to save hydrogen fuel consumption and operate at high efficiency in the fuel cell/battery hybrid system to power a small Aircraft. We achieved that by working on the power management of the fuel cell/battery hybrid propulsion system for small UAV by using the fuzzy logic controller and charging up the batteries. The hybrid propulsion system consists of a 1.2kW PEM fuel cell, three 12V batteries, DC/DC converters, and an electric engine. The fuzzy logic controls the batteries' output powers through the bidirectional DC/DC converter. It will help maintain the fuel cell operates at an optimal point with high efficiency as the main power supply for different flight phases to achieve the desired power.

Optimal parameters design method for power reflux hydro-mechanical transmission system

2018 ◽  
Vol 233 (3) ◽  
pp. 585-594 ◽  
Author(s):  
Qiao Zhang ◽  
Dongye Sun ◽  
Datong Qin
Keyword(s):  
High Efficiency ◽  
Automatic Transmission ◽  
Planetary Gear ◽  
Torque Converter ◽  
Transmission System ◽  
Speed Ratio ◽  
Structural Parameter ◽  
Mechanical Transmission ◽  
Power Performance ◽  
Starting Torque

To ensure the starting torque ratio while improving the efficiency of the automatic transmission system, a power reflux hydro-mechanical transmission system which consists of a torque converter, a planetary gear, and two gearboxes is proposed. First, the properties of the speed ratio, torque ratio, efficiency, and capacity in the power reflux hydro-mechanical transmission system are modeled. Then, the non-dominated sorting genetic algorithm II is used to optimize the structural parameter of the planetary gear and the speed ratio of the gearbox T1, with the speed ratio width in the high-efficiency area, efficiency, and power performance acting as target functions. Moreover, the method of selecting the specific torque converter for the power reflux hydro-mechanical transmission system is proposed. Results show that the starting torque ratio of the power reflux hydro-mechanical transmission system increases to 4.87 and the equivalent efficiency in high-efficiency area of the power reflux hydro-mechanical transmission system reaches to 90.87%. Therefore, the power reflux hydro-mechanical transmission system can reach higher efficiency while ensuring the starting torque ratio compared with hydro-mechanical power split transmission, which can significantly reduce fuel consumption once applied to the construction vehicle.

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