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Viewing 1 to 30 of 2099
Event
2014-11-25
Event
2014-11-19
Event
2014-11-19
Event
2014-11-19
Event
2014-11-19
For a widespread adoption of Electric and Hybrid vehicles, a robust and convenient charging method is necessary. Economic cars in the near future will have limited electric driving range, and therefore will need frequent charging. Therefore, wireless automated charging will be most suitable for the widespread acceptance of electric and plug-in hybrid cars.
Event
2014-10-28
Event
2014-10-21
This session covers powertrain control processes related to achieving stringent market fuel economy, emissions, performance, reliability, and quality demands of hybrid and electric powertrains. Topics include the control, calibration, and diagnostics of the engine, powertrain, and supporting electromechanical subsystems related to energy management.
Event
2014-10-21
Power electronics and electric motors are essential for improving vehicle efficiency through drivetrain electrification. Technologies that support high efficiency, high power density, and low cost motors and power modules are required for the success of vehicle electrification
Event
2014-10-20
This session covers new production and near-production hybrid powertrains, hybrid architecture, and testing.
Technical Paper
2014-10-13
Rajasekhar MV
In the recent times importance of environmental changes and energy efficiency are the key considerations for any vehicle manufacturer. With the surge in vehicle population exceeding 40 million in India and their adverse effects on environment, government agencies are in a process of implementing stringent norms to curb vehicle pollutions. In these scenarios with fierce competition from around the world, local Vehicle manufactures have to pose a greater challenge on product design aspects of energy efficiency, fuel economy along with low capital cost. In the context of developing countries choosing the right technology such as clean diesels, parallel hybrid, series hybrid, EVs, B-ISG systems etc for the right segment of vehicle can play a major role in making a vehicle a big success. In all these considerations the manufacturer has to meet the requirements along with not exceeding the cost targets. This paper details the approach and strategy for vehicle manufactures to implement different technologies based on the class, segment and cost of the vehicle for achieving the desired results to achieve energy efficiency, environmental efficiency and fuel economy benefits for cost conscious markets of developing countries.
Technical Paper
2014-10-13
Gerhard Kokalj, Patrick Schatz, Christoph Zach
The automotive industry is racing to introduce some degree of hybridization into their product ranges. Since the term “hybrid vehicle” can cover a wide range of differing technologies and drivetrain topologies, this has led to a plethora of vehicles that call themselves “hybrid”. This poses an interesting challenge for marketers to differentiate these vehicles from the incumbents. However, it is not just the marketers who are faced with challenges, the developers of such hybrid drivetrains are faced with a rise in technical complexity due to the wide range of operating modes hybridization introduces. As propulsive torque is being generated in more than one place in a hybrid vehicle, the transitions from conventional drive to electrically supported drive bring with them complex aspects of multi-dimensional system control. The challenge is to be able to implement hybrid technology in an existing drivetrain, while adapting the existing components as required. The functional variability of hybrid technology, however, permits a range of possible implementations and the control calibration tasks themselves need to be well structured concerning hand-over, traceability and robustness.
Technical Paper
2014-10-13
Raja Mazuir Bin Raja Ahsan Shah, Andrew McGordon, Mark Amor-Segan, Paul Jennings
Several studies have shown that a Micro Gas Turbine (MGT) can potentially be used as a range extender for an electric vehicle or a series hybrid electric vehicle. The continuous process of combustion provides advantages in terms of noise, vibration and gaseous emission such as hydro carbon (HC), carbon monoxide (CO) and nitrogen oxides (NOx). Most MGTs have the capability to run on multi fuel without the need to change hardware configuration. The power density of the MGT is much higher than an internal combustion engine due to its less complex design, e.g. no cooling and lubrication systems are required within its architecture. However, not much research has been done to investigate in detail the technical requirements of the MGT from an automotive perspective, particularly the effect of intake temperature (engine bay temperature) on the performance and the tailpipe emissions. Previous work has shown that the engine bay temperature can be significantly higher than the ambient temperature during vehicle hot soak.
Technical Paper
2014-10-13
Stefan Geng, Thomas Schulte
Hybrid electric powertrains are developed for reducing the fuel consumption and the emission of carbon dioxide. In order to achieve a reduction in comparison to conventional vehicles, an improved efficiency of the overall system is required. It depends on the powertrain topology, its components and the applied control strategy. For testing and improving the control strategy in terms of the overall system efficiency, Hardware-in-the-Loop (HIL) simulation can be applied. Thereby, a real-time simulation of the powertrain is used to emulate the behavior of the actuator and sensor signals in order to operate the corresponding electronic control units in a virtual test environment [1], [2]. The development of real-time capable powertrain models is a time-consuming task, due to high dynamics and switching frequencies of the electrical subsystem, comprising the electric drive, inverter and battery and due to the immense diversity of powertrain configurations, comprising the transmission, the combustion engine, the electric drives, etc.
Technical Paper
2014-10-13
Michal Geca, Lukasz Grabowski, Miroslaw Wendeker
The bus technology development caused by the travelling comfort requirements of passengers, audiovisual communication with the transport organizer, interior lightening and electronics-aided urban traffic management entails an increasing electrical load of bus network. Electric energy consumption in contemporary city bus is an important stream of energy within the overall energy output balance. Alternator driven by the bus combustion engine is the source of bus electricity. The input energy source is the chemical energy contained in the diesel fuel. Nowadays, a great attention is devoted to the application of Photovoltaic (PV) systems to some urban contexts and to sustainable mobility. The generation of electricity through the solar cells installed on the roof of a vehicle could replace or complement the energy normally produced by the alternator, with consequent savings in fuel consumption and pollutant emissions. The article examines the possible electric energy collected by the photovoltaic panels installed on the roof of the bus.
Technical Paper
2014-10-13
Fuyuan Yang, Lei DU, Changsheng Yao, Jiaen Du, Ping Yu
The efficiency of traction motor affects the overall efficiency of city buses which most of time creep among jammed city traffic. The low speed and torque operating condition deviate from the high-efficiency region of electric motor. This paper discusses whether it is possible to improve the motor efficiency by a two-speed transmission and if so, to what extent. In this paper, based on the China Bus Urban Cycle, an 8-meter electric bus is studied, and the comparison of motor efficiency between two different configurations is made: direct drive and drive through a two-speed transmission. In the ‘direct drive’ configuration, the traction motor drives the main reducer directly, while in the other configuration installed a two-speed transmission between. Apart from that, all other specifications are the same. The study is conducted via modeling and simulation in Matlab/Simulink environment. In the simulation of both configurations, models of driver, traction motor, two-speed transmission, the I-curve of braking forces distribution and vehicle controller are built.
Technical Paper
2014-10-13
Boru Jia, Zhengxing Zuo, Huihua Feng, Guohong Tian, A.P. Roskilly
Free-piston engine generator (FPEG) is a novel type of energy conversion device, which integrates a linear combustion engine and a linear electrical machine into a single unit. As an alternative to conventional engines, FPEG is a promising power generation system due to its simplicity and high thermal efficiency and has attracted considerable research interests recently. This paper presents the development for a spark-ignited free-piston engine generator prototype which was rated to 3kW power output, and the designation of major sub-systems is introduced. The electrical linear machine is operated as a linear motor to start the engine and switched to a generator after successful ignition. Closed-loop control strategy was investigated and implemented for the starting process with a constant force provide by the linear machine. Ignition is one of the most crucial problems for the generating process, thus a unique control sub-system to generate ignition signals at the correct ignition timing based on the piston position was completed.
Technical Paper
2014-10-13
Lukasz Grabowski
City buses are equipped with an increasing number of electrical devices that are designed to improve the driver work and increase the passengers comfort. Among them may be mentioned: monitors displaying routes, monitors displaying advertisements, ticket machines, fans of air conditioning and heating systems, safety monitoring systems or interior lighting. The purpose of the bus engine is thus not only provide mechanical energy required to overcome the resistance to motion, but also the production of large amounts of electricity. Direct source of this energy comes from the fuel contained in the tank, which is burned in a combustion engine. The engine provides mechanical energy to the alternator via a belt transmission, to generate electricity. Due to the high power consumption by electrical equipment, in the city buses there are several alternators connected parallel, and their combined power can be more than 10 kW. Maximum efficiency can reach 70%, but due to changing operating conditions defined by engine rotational speed and load current, the average efficiency of the alternator is much lower than the maximum.
Technical Paper
2014-10-13
W.S. Zidan, H. Metered
Hybrid electric vehicles are the most promising alternatives to conventional internal combustion engine vehicles which satisfy increasing customer requirements such as fuel economy, ordinary road performance and drive-ability at minimum cost. The performance of Hybrid electric vehicle depends on the design of its electric motor. This paper introduces a mathematical model of a permanent magnet synchronous motor for the hybrid electric vehicles. The model is validated against a previous published work and implemented using MATLAB/Simulink software for a complete system of hybrid electric vehicles during both theoretical and actual driving cycles to show its practicality. Finally, the validation results clearly show that the proposed mathematical model can reliably represent the behavior and performance of the permanent magnet synchronous motor for the hybrid electric vehicles in the real-time implementation.
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