同步碎石封层车增程电驱动混合动力系统设计研究

通过分析传统同步碎石封层车的整车结构、工作原理、作业流程,提出了同步碎石封层车串联混合动力系统结构;基于某型号同步碎石封层车基本参数及动力性能指标,对同步碎石封层车混合动力系统中主要动力元件进行参数匹配研究及选型;结合混动同步碎石封层车4种工作模式下能量流动特点和转场、作业两种工况下的能量需求,研究系统能源管理系统,制定增程式车辆发动机和辅助能量源间的能源管理策略。运用Cruise仿真软件搭建同步碎石封层车混合动力系统仿真模型,将所提能源管理策略导入Cruise仿真平台,基于Cruise和MATLAB联合仿真来研究混动同步碎石封层车动力性能。仿真结果表明：混合动力同步碎石封层车各部分参数匹配都能很好地满足工作要求,发动机可以一直工作在最佳范围内,波动较小,混动同步碎石封层车节油率为24.7%,能量回收率为20.34%,燃油经济性能得到较大提高。     

基于AMEsim-Simulink/Stateflow联合仿真平台的控制策略建模和车辆性能仿真

基于AMESim-Simulink/Stateflow联合仿真平台,对混联式液压混合动力车辆的传动系统与车辆控制器进行建模。根据车辆的预期行驶状况、蓄能器的压力情况与需求扭矩的变化,实时切换车辆不同的液压混合动力工作模式,采用CYC_1015车辆循环工况对其进行模拟分析。仿真结果表明,采用混联式液压混合动力驱动系统可明显提高车辆的燃油经济性,同时满足车辆的制动效果和动力性能。     

基于中型柴油机的电动增压技术研究

基于发动机一维性能仿真模型,在某中型柴油机平台及其衍生的混动平台上开展了电动增压系统匹配方案对于整机性能影响的研究.基于柴油机平台研究了不同电动压气机布置形式对发动机性能的影响,并在基于同一柴油机升级的混合动力平台上研究了应用电动压气机的效果.结果表明:柴油机平台上,电动压气机串联布置形式优于并联式.串联前置时低速转矩...     

车用柴油串联式混合动力系统经济性试验研究

为评估柴油串联式混合动力客车动力系统的性能,特别是燃油经济性,建立了串联式混合动力系统测试平台.在详细描述串联式混合动力系统能量管理策略和辅助动力单元(APU)控制的基础上,通过中国城区公交道路循环测试,对影响串联式混合动力系统燃油经济性的几个要素进行了分析.研究结果表明:在既定能量管理策略的基础上,制动能量回馈、电驱动子附件功率和发动机怠速是影响燃油经济性的三个显著因素.     

增程式燃料电池混合动力有轨电车电源系统优化配置

为实现燃料电池混合动力有轨电车的经济运行,提出以燃料电池为增程式动力源的运行模式,并通过步进式枚举法对电源系统进行优化配置.首先,定义燃料电池混合动力有轨电车的运行模式及电源系统混合度,构建各电源系统模型;然后,建立电源系统全寿命周期综合成本函数,并考虑约束条件对电源系统进行优化配置;最后,以全寿命周期经济性、充电桩容...     

串联混合动力摩托车动力系统设计及仿真

根据我国两轮机动车市场的未来发展需求和城市行驶工况特点,在对比分析了两种混合动力系统结构之后,选择了串联式驱动形式作为摩托车混合动力系统结构,介绍了串联式混合动力摩托车动力系统主要动力部件的选型和参数匹配,并对串联式混合动力摩托车和传统驱动结构摩托车在燃油经济性和排放上进行了基于AVL_CRUISE软件的仿真对比.     

一种混合内燃机动力系统控制研究

介绍了以内燃机工作特性为基础的某混合动力系统的控制算法.利用CRIUSE建立了该混合动力系统和整车动力学模型,控制策略模型則在Matlab/Simulink环境下实现.通过仿真计算,在满足动力性的前提下,该系统和控制算法对车辆的燃油经济性提高显著,在电能自平衡工况下,城市循环工况油耗为7.3 L/100 km,节油循达33%;外部充电时,综合节油率可达50%.     

内河干线船舶混合动力系统匹配设计

针对内河船舶动力系统匹配设计粗糙,且河道工况复杂,对动力系统的功率需求多变等情况,提出一种并联式混合动力系统匹配设计方法。根据任务剖面分析、混动模式功率划分、动力系统指标分解、关键设备选型等环节实现系统设计。在航行试验阶段验证各模式的航速性能,全模式螺旋桨转速误差在5%以内,全模式航速误差在3%以内,可以满足实际的工程使用需求。     

复合翼垂直起降无人机直驱混合动力系统验证设计与试验建模方法

为了提升垂起固定翼无人机垂直机动时间,在简化油电混合动力系统研究与应用难度的同时提高油电混合动力垂起固定翼无人机能量利用率与动力冗余度,提出了一种油电混合动力垂起无人机动力系统拓扑结构方案。基于此拓扑结构选择与开发适配于起飞重量为15-20kg的垂起固定翼无人机动力系统软硬件,以此搭建了油电混合动力垂起无人机动力系统一体化验证平台,该验证平台能够在地面模拟油电混合动力垂起无人机不同工况与工作模式,同时具有较强的人机交互性,能够实现对动力系统不同工况下的典型输出参数采集。基于此验证平台,设计了动力系统稳态特性与动态特性试验方案,采用试验建模法建立了动力系统稳态与动态数学仿真模型,通过仿真与实物对比试验分析法,验证试验方案可行性与模型准确性。动力系统配装垂起无人机完成飞行试验,全系统工作正常,验证了实际工况下动力系统的可靠性。     

船舶柴电混合动力系统在电力助推模式下的性能仿真研究

应用AMESim软件对船舶柴电混合动力系统建模并进行试验验证。试验验证表明:所建立的模型稳态误差≤5%,满足精度要求。采用所建立的模型仿真分析了Booster模式下系统在不同工况下的匹配特性;并研究了柴油机与轴带电机稳定运行的控制策略。     

Drive cycle simulation of light duty mild hybrid vehicles powered by hydrogen engine

In the ongoing efforts to reduce CO2 and pollutant emissions, hydrogen combustion engine can provide immediately available mature technology for carbon-free transportation. Hydrogen combustion does not produce on-site CO2 emissions, the principal pollutant is NOx (which can be minimized using appropriate combustion control and aftertreatment), and the available ICE technology can be readily modified to accommodate for hydrogen use. The paper provides a prediction of the performance of a hydrogen combustion engine in passenger vehicles, aiming at extending or updating the available research with the current powertrain trends, namely downsizing, turbocharging, and hybridization. Data gathered from a single-cylinder engine fueled by a lean hydrogen mixture are used as input into a mild hybrid vehicle model, which is used for quasi-static drive cycle simulations. The results show NOx emission around the EURO VI limit without the use of any aftertreatment and fuel consumption as low as 1.1 kgH2/100 km in WLTC.     

A comprehensive review on choice of hybrid vehicles and power converters,control strategies for hybrid electric vehicles

A worldwide shift headed for a greener and low emissions will necessitate remarkable advancement in the way in which the energy is being produced and used. The factors such as climate changes induced by pollution, progressively more strict emissions norms for vehicles, depletion of petrol/diesel along with instability in their prices for transportation systems, play a vital role in the improvisation of technology involved in conventional vehicles. The hybrid electric vehicles (HEVs) are on the peak of the list of choices available for clean vehicle technologies. The various architectures of HEV, different methodologies of hybrid vehicle, are focused in this paper. The design criteria and optimization techniques with reference to the driving cycle is also elucidated. The various electric drives used for HEV are discussed in this paper. Also, the different electric propulsion systems are explained. To improve the fuel economy and emission of hybrid power system, control strategies are very significant. Researchers concentrate in optimizing the performance of HEV.     

Simulation for the analysis of a hybrid electric scooter powertrain

This paper describes the mathematical modelling, analysis and simulation of a novel hybrid powertrain used in a scooter. The primary feature of the proposed hybrid powertrain is the use of a split power-system that consists of a one-degree-of-freedom (dof) planetary gear-train (PGT) and a two-dof PGT to combine the power of two sources, a gasoline engine and an electric motor. Detailed component level models for the hybrid electric scooter are established using the Matlab/Simulink environment. A simple rule-based power control strategy is then established with the primary objective to optimize the fuel economy of the hybrid electric scooter. The performance of the proposed hybrid powertrain is studied using the developed model under four driving cycles. The simulation results verify the operational capabilities of the proposed hybrid system and show both the engine and the electric motor work in an optimal state under various operating conditions.     

Operating strategy for a hydrogen engine for improved drive-cycle efficiency and emissions behavior

Due to their advanced state of development and almost immediate availability, hydrogen internal combustion engines could act as a bridging technology toward a wide-spread hydrogen infrastructure. Extensive research, development and steady-state testing of hydrogen internal combustion engines has been conducted to improve efficiency, emissions behavior and performance. This paper summarizes the steady-state test results of the supercharged hydrogen-powered four-cylinder engine operated on an engine dynamometer. Based on these results a shift strategy for optimized fuel economy is established and engine control strategies for various levels of hybridization are being discussed. The strategies are evaluated on the Urban drive cycle, differences in engine behavior are investigated and the estimated fuel economy and NO_x emissions are calculated. Future work will include dynamic testing of these strategies and powertrain configurations as well as individual powertrain components on a vehicle platform, called ‘Mobile Advanced Technology Testbed’ (MATT), that was developed and built at Argonne National Laboratory.     

基于整车性能的重型车用发动机优化配置

以一款载重卡车动力总成选配为例,根据国家标准和实际使用状况,以动力性和经济性为评价目标,通过模拟计算和试验对可供选配的三款发动机进行匹配计算和分析。结果表明：样车配置A款发动机的性能优于B款发动机,而配置经改进后的B款发动机(C款)其性能有了明显的提高;若实现整车和发动机的同步开发,可以大幅提高整车的动力性、经济性。为整车动力总成优化和车用发动机的特性优化提供了可行的技术路线。     

Systemic tradeoff analysis of fuel cell mobility systems

The development of electric mobility systems with fuel cells is associated with a special constellation of circumstances. The definition of powertrain systems on board electric vehicles is dependent on the refueling infrastructure. At the same time, the development of a hydrogen infrastructure is dependent on vehicle definition and introduction. The joint development of powertrain and infrastructure is a unique opportunity to optimize both the systems. In this paper, we select a number of tradeoffs between the powertrain design and the infrastructure design and calculate technical and financial effects. By way of example we show an optimization of the fuel cell, battery and tank size subject to user behavior and infrastructure constraints. Using powertrain simulations we calculate hybridization ratio and tank size. We then show an exemplary infrastructure layout consisting of transmission and distribution networks. In this paper we consider the infrastructure in Germany by 2030. We then proceed to show the implications of the mutual dependencies between vehicle and infrastructure and to analyze technical potentials and overall system costs. Our main conclusions show ways that could be beneficial for the introduction of electric mobility with fuel cells and a hydrogen infrastructure.     

Hybrid polymer electrolyte membrane fuel cell–lithium‐ion battery powertrain testing platform – hybrid fuel cell electric vehicle emulator

A testing and validation platform for hybrid fuel cell (FC)–lithium‐ion battery (LIB) powertrain systems is investigated. The hybrid FC electric vehicle emulator enables testing of hybrid system components and complete hybrid power modules up to 25 kW for application in electric light‐duty vehicles, light electric vehicles and so forth. A hybrid system comprising a 10‐kW_el low‐temperature polymer electrolyte membrane FC stack and an 11.5‐kWh LIB pack is installed. The system supplies power to a 20‐kW permanent magnet synchronous motor and a 25‐kW alternating current asynchronous, electrically programmable dynamometer is used to simulate the vehicle load during testing at dynamic drive cycle. The steady‐state performance tests of the direct current (DC) motor, DC/DC converter, low‐temperature polymer electrolyte membrane FC stack and LIB are performed as well as dynamic tests of the complete hybrid system. The Economic Commission for Europe driving cycle is selected as a reference cycle to validate the investigated hybrid FC–LIB powertrain. An efficiency of 83% and 95% is measured for electric motor and DC/DC converter, respectively. An average stack efficiency of 50% is achieved. An average hydrogen consumption of 3.9 g * km^?1 is reached during the Economic Commission for Europe driving cycle test. Copyright © 2017 John Wiley & Sons, Ltd.     

混合动力电动汽车方案设计与仿真研究

提出了一种新的混合动力电动汽车的设计方案,并对系统的主要部件进行了选型和参数设计,建立了整车、制动控制策略和永磁同步电动机Simulink模型,并在CYC_UDDS循环工况下进行了仿真研究。结果表明:燃油经济性和排放性能明显改善,设计方案合理。     

Well-to-wheel analysis of hydrogen fuel-cell electric vehicle in Korea

This study provides methodologies, data collection and results of well-to-wheel greenhouse gas analysis of various H₂ production pathways for fuel-cell electric vehicle (FCEV) in Korea; naphtha cracking, steam methane reforming, electrolysis and coke oven gas purification. The well-to-wheel (WTW) greenhouse gas emissions of FCEV are calculated as 32,571 to 249,332 g-CO₂ eq./GJ or 50.7 to 388.0 g-CO₂ eq./km depending on the H₂ production pathway. The landfill gas (on-site) pathway has the lowest GHG emissions because the carbon credit owing to use landfill gas. The electrolysis with Korean grid mix (on-site) pathway has the highest GHG emissions due to its high emission factor of the power generation process. Furthermore, the results are compared with other powertrain vehicles in Korea such as internal combustion engine vehicle (ICEV), hybrid electric vehicle (HEV) and electric vehicle (EV). The averaged WTW result of FCEV is 35% of ICEV, is 47% of HEV, and is 63% of EV.