This study compared fuel economy and emissions between heavy-duty hybrid electric vehicles (HEVs) and equivalent conventional diesel vehicles. In-use field data were collected from daily fleet operations carried out at a FedEx facility in California on six HEV and six conventional 2010 Freightliner M2-106 straight box trucks. Field data collection primarily focused on route assessment and vehicle fuel consumption over a six-month period. Chassis dynamometer testing was also carried out on one conventional vehicle and one HEV to determine differences in fuel consumption and emissions. Route data from the field study was analyzed to determine the selection of dynamometer test cycles. From this analysis, the New York Composite (NYComp), Hybrid Truck Users Forum Class 6 (HTUF 6), and California Air Resource Board (CARB) Heavy Heavy-Duty Diesel Truck (HHDDT) drive cycles were chosen. The HEV showed 31better fuel economy on the NYComp cycle, 25better on the HTUF 6 cycle and 4worse on the CARB HHDDT cycle when compared to the conventional vehicle. The in-use field data indicates that the HEVs had around 16better fuel economy than the conventional vehicles. Dynamometer testing also showed that the HEV generally emitted higher levels of nitric oxides than the conventional vehicle over the drive cycles, up to 77higher on the NYComp cycle (though this may at least in part be attributed to the different engine certification levels in the vehicles tested). The conventional vehicle was found to accelerate up to freeway speeds over ten seconds faster than the HEV.

关键词：电动车辆；测功机；柴油机；卡车；排放

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Integrating large-scale renewable energy sources and electric vehicles into the power grid, Smart Charging and Vehicle-to-Grid of the electric vehicles play an important role for supply and demand matching in the power grid. The integrated control schemes considering the vehicle user's convenience, battery condition during the idle time, and grid-friendly contribution, have been designed. It is also important to implement the control schemes into the commercial electric vehicle and its supply equipment. This paper describes a laboratory test system of Smart Grid and E-Mobility consisted by an electric vehicle battery test bed, a bi-directional controllable charger, an interface controller with flexibility in communication and control, and a real-time digital simulator. Communication and control functions of each component are confirmed through fundamental experiments, and the load frequency control schemes are implemented to the system.

关键词：电动车；供水设备；负荷频率控制；通信和控制接口；智能电网

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关键词：智能推荐系统；汽车零部件；汽车

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The objective of the study was to assess the impact of a Saflex1 S Series solar control PVB (polyvinyl butyral) windshield on conventional vehicle fuel economy and electric vehicle (EV) range. The approach included outdoor vehicle thermal soak testing, RadTherm cooldown analysis, and vehicle simulations. Thermal soak tests were conducted at the National Renewable Energy Laboratory's Vehicle Testing and Integration Facility in Golden, Colorado. The test results quantified interior temperature reductions and were used to generate initial conditions for the RadTherm cooldownanalysis. The RadTherm model determined the potential reduction in air-conditioning (A/C) capacity, which was used to calculate the A/C load for the vehicle simulations. The vehicle simulation tool identified the potential reduction in fuel consumption or improvement in EV range between a baseline and solar control PVB configurations for the city and highway drive cycles. The thermal analysis determined a potential 4.0% reduction in A/C power for the solar control PVB configuration. The reduction in A/C power improved the vehicle range of EVs and fuel economy of conventional vehicles and plug-in hybrid electric vehicles.

关键词：电动汽车；太阳能；PVB玻璃

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The structure design and pressure control of electro-hydraulic braking system (EHB) is essential for electric vehicles,which is critical to the braking energy recovery and vehicle stability control.In this paper,the overall structure of the electro-hydraulic braking system is analyzed,and classification method according to how the braking pedal is decoupled with the braking pressure is proposed.Through the PID control method to achieve pressure following control,it lays the foundation for electric vehicle stability control.

关键词：电动汽车；电液制动；压力控制系统

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In the design of CAN network system,as CAN bus topology will affect network performance and cost,it is important to optimize the network topology.This paper analyzes the CAN busload based on CAN protocol,calculates the upper limit of transmission message frames in a single CAN bus.As the amount of information on the bus is increasing,a single CAN bus cannot meet the communication requirements,we put forward dividing the network into multiple homogeneous segments via multi-objective optimization method,developing a genetic algorithm strategy and solving the problem in a MATLAB platform.Finally utilize the method to design a pure electric vehicle network topology.

关键词：电动汽车；拓扑结构；优化

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This report focuses on the light-duty vehicle sector in the United States and restricts its discussion of electric vehicles to plug-in electric vehicles (PEVs), which include battery electric vehicles (BEVs)1 and plug-in hybrid electric vehicles (PHEVs). The common feature of these vehicles is that their batteries are charged by being plugged into the electric grid. BEVs differ from PHEVs because they operate solely on electricity stored in a battery (that is, there is no other power source); PHEVs have internal combustion engines that can supplement the electric power train. The electric vehicle offers many promisesincreasing U.S. energy security by reducing petroleum dependence, contributing to climate-change initiatives by decreasing greenhouse gas (GHG) emissions, stimulating long-term economic growth through the development of new technologies and industries, and improving public health by improving local air quality. There are, however, substantial technical, social, and economic barriers to widespread adoption of electric vehicles, including vehicle cost, small driving range, long charging times, and the need for a charging infrastructure. In addition, people are unfamiliar with electric vehicles, are uncertain about their costs and benefits, and have diverse needs that current electric vehicles might not meet. Although a person might derive some personal benefits from ownership, the costs of achieving the social benefits, such as reduced GHG emissions, are borne largely by the people who purchase the vehicles. Given the recognized barriers to electric-vehicle adoption, Congress asked the Department of Energy (DOE) to commission a study by the National Academies to address market barriers that are slowing the purchase of electric vehicles and hindering the deployment of supporting 

关键词：电动汽车；部署障碍；中期报告

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Controller area network (CAN) is one of the popular networks with the international standard,and adopted mostly on the vehicle.SAE J1939 is designed to allow electronic devices from different vendors to communicate with each other through a standard architecture.CAN communication length have some relationship with CAN bus rate,which may influence the rate choice and network topology.We design a CAN network with distributed control systems for a pure electric vehicle.The identification bit implementation of data for vehicle controllers is present in accordance with J1939 protocol.The vehicle network topology is considered based on controlling functions and CAN bus harness arrangement.The communication process for them is given based on CANoe platform and finally tested in real electric vehicle environment.

关键词：电动汽车；分布式控制系统；通信网络

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关键词：电动汽车；EV项目；SAE世界大会

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Electric vehicles will longitudinally vibrate obviously under acceleration and regenerative braking conditions (because of torsional vibration of the electric vehicle powertrain).This paper includes models of motor rotor,gear reducer and differential assembly,half shafts,tire and body and nonlinear powertrain dynamic model in consideration of gear backlash and frictional characteristics between tire and ground.Real car tests confirm that it is correct under acceleration conditions.Then a two mass-spring damper linear model which is simplified from the nonlinear powertrain dynamic model is proposed to design torsional vibration control algorithm based on state feedback.The simulation results show that the algorithm can actively eliminate torsional vibration.

关键词：电动汽车；动力系统；状态反馈；扭转振动；

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