Papers by Keyword: Powertrain

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Authors: Chun Hua Xu
Abstract: The motivation for this development is to establish a new method of powertrain structural analysis and parameters matching of extended-range electric vehicle. For the main drawback of pure electric vehicle, which driving distance is short, the new powertrain will achieve efficient operation of range extender and extend the driving range effectually. The innovative technique is based on a co-simulation platform of AVL-Cruise and Simulink. A thermostat energy management strategy is adopted to verify the parameters of powertrain. Finally, the simulation results demonstrate that the system design and parameters matching of the whole vehicle powertrain are reasonable.
Authors: N.I. Schurov, A.A. Shtang, M.V. Yaroslavtsev
Abstract: The article explores possible structures of road public transit vehicles, distinguishing by energy sources. Available primary energy sources and energy storage devices are compared. The most promising structures are chosen and their main properties are estimated. Some recommended strategies then follow.
Authors: M.V. Yaroslavtsev, N.I. Schurov, E.A. Belova
Abstract: Buffer energy storage capacity and primary energy source power are considered to define the performance of a hybrid electric vehicle. Required buffer storage capacity depends on the vehicle’s driving cycle. The margin of hybrid bus buffer energy storage is estimated on the base of trolleybus driving cycle recordings. The dependence of buffer energy storage on primary energy source power has been determined. Combinations of buffer energy storage and primary energy source power corresponding to different degrees of hybridization are discussed. The described analysis sequence can be applied for designing a hybrid powertrain and adjusting it to specific working conditions.
Authors: Ilie Dumitru, Matei Vînătoru, Dragos Tutunea, Alexandru Dima
Abstract: The authors present in this paper the opportunities offered by the use of software platforms (MULTISIM) in the validation of informational systems for optimizing economical consumption. So after some research (based on identification methodology system type) a physical-mathematical model can be developed that offers the possibility to optimize fuel consumption in the economy pole depending on specific correlations of operating regimes. Resulted relationships allow designing of information systems by proposing solutions which acquire information on movement speed, engine RPM in load (by determining the actual torque through correlations of exhaust gas temperature, moment and torque).Having these relationships we can design, for example, system version with discrete components or with digital system for surveillance engine operation.
Authors: De Rong Tan, Chun Ying Dong, Wang Jing
Abstract: In this paper, according to actual power demands of the bus, its powertrain was designed. In this process, the lowest oil consumption was the goal on the foundation of meeting basic power need. The co-simulation with Plug-in vehicle model was realized in Cruise, using the control strategy model which was established by the Stateflow in Simulink. Simulation results indicated that modified Plug-in hybrid electric bus not only can reach the expectant power indictors, but also improve the fuel economy. So, this research played a leading role in the design and research of hybrid buses’ parameters
Authors: Gao Gao Shang, Meng Ting Lu
Abstract: Based on a technique of mixed programming with MATLAB and C#, the transmission parameters optimization software was developed to improve the power performance of off-road vehicle. The power loss rate and the starting acceleration time were chosen as objective function, and the requirements of the vehicle performance and the gearbox ratio interval was used as constraint conditions. The result of verification example showed that both objective function values are reduced after optimization and the effect of optimization with power loss rate is more significant.
Authors: Hong Wei Chen, Xin Zhang, Xiao Shuai Zhang
Abstract: A new type powertrain system architecture for city electric bus was introduced, which combines the function of Extended-Range Electric Vehicle (E-REV) and Plug-in Hybrid Electric Vehicle (P-HEV). Five driving modes were designed and its dynamics were analyzed. Numerical method on dynamics was proposed. The dynamic performance parameter of five drive modes were calculated and analyzed. The results indicate that the dynamic performance reaches the limit value at full drive mode and meet the requirement of city bus.
Authors: You Shan Gao, Zhi Song, Ai Hong Wang, Ze Kun Jin
Abstract: Through established the simulation model for the engine and the traction host powertrain of rolling impact compaction machine, Simulated the working load with time history with the simulation parameters of rolling impact compaction machine. The simulation accuracy was verified by compared between the test speed and the simulation speed. The speed, turbine torque, torque converter efficiency, torque converter, gear ratios, fuel consumption, engine power, torque are dynamic changes follow with the alternating load and slope load so as to adapt to the dynamic drag torque fluctuations. Traction host power must be equipped with a full host transmission of the internal combustion engine. Driveline should be hydraulic transmission fluid or hydraulic machinery.
Authors: N.I. Schurov, M.V. Yaroslavtsev, D.M. Strelnikova
Abstract: The article deals with the selection of optimal parameters of hybrid electric vehicle power sources. Construction of a hybrid electric vehicle with buffer energy storage based on double electric layer capacitors considers choosing minimal sufficient capacity of the storage.Required buffer storage capacity depends on the vehicle’s driving cycle. If it moves in cycle with the average power (the ratio of energy consumption to the duration of the cycle) higher than power of primary energy source, it means that missing energy would be drawn from the buffer storage and long-time moving in this cycle would discharge it. To avoid the case, the power of primary source and the capacity of buffer storage should be chosen in coordination.In the article the primary source power ensuring any driving cycle implementation with minimal storage capacity is calculated. It may be further reduced taking into account real driving cycles. A technique of selecting the combination of primary source power and buffer storage capacity based on numerical modeling of energy consuming process is proposed.
Authors: Cristiana Delprete, A. Galeazzi, F. Pregno
Abstract: The work is devoted to study the dynamic properties of a powertrain, performing an experimental modal analysis (EMA). The aim is to determinate structural modes and frequency response function (FRF) using an experimental approach. Two types of excitation mechanism are applied and compared for the EMA: a modal exciter (electromagnetic shaker system) and an impact hammer. Both the analyses with modal shaker and with impact hammer are carried on measuring the acceleration of the structure in the same set of eighty-one points. In both cases, the excitation is performed along three directions (vertical, lateral and longitudinal with respect to the structure). The two different modal analysis methodologies are described, and results (modal parameters such as natural frequencies, damping ratios and modal shapes are identified with commercial software) are compared. The comparison is made in term of result accuracy, reliability and testing time required.
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