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1.
The pressing need to alleviate our urban airquality has provided the impetus for electric vehicles. Over the years, a great deal of research and development work has been carried out, and is still underway, on all aspects of electric vehicles especially on improving the power sources, namely the re-chargeable batteries, fuel cells and electrochemical supercapacitors. The developments in rechargeable batteries for electric vehicles are reflected in this part of the article while fuel cells and electrochemical supercapacitors will be described in Part 2 of the article.  相似文献   

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To solve the low power density issue of hybrid electric vehicular batteries, a combination of batteries and ultra- capacitors (UCs) could be a solution. The high power density feature of UCs can improve the performance of battery/UC hybrid energy storage systems (HESSs). This paper presents a parallel hybrid electric vehicle (HEV) equipped with an internal combus- tion engine and an HESS. An advanced energy management strategy (EMS), mainly based on fuzzy logic, is proposed to improve the fuel economy of the HEV and the endurance of the HESS. The EMS is capable of determining the ideal distribution of output power among the internal combustion engine, battery, and UC according to the propelling power or regenerative braking power of the vehicle. To validate the effectiveness of the EMS, numerical simulation and experimental validations are carried out. The results indicate that EMS can effectively control the power sources to work within their respective efficient areas. The battery load can be mitigated and prolonged battery life can be expected. The electrical energy consumption in the HESS is reduced by 3.91% compared with that in the battery only system. Fuel consumption of the HEV is reduced by 24.3% compared with that of the same class conventional vehicles under Economic Commission of Europe driving cycle.  相似文献   

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燃料电池是一种等温并直接将储存在燃料和氧化剂中的化学能高效、环境友好地转化为电能的新型发电装置.燃料电池不受热机效率的限制,能量转换效率高,无污染、无噪音,具有满足环境保护的要求.预计燃料电池系统将在洁净煤燃料电池电站、电动汽车、移动电源、不间断电源、潜艇及空间电源等方面有着广泛的应用前景和巨大的潜在市场.本文介绍了燃料电池的的优点、主要种类、工作原理、国内外发展概况以及燃料电池的前景展望。  相似文献   

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为了研究汽车能耗和汽车质量之间的关系,本文首先建立了仿真的目标,即以内燃机驱动、混合动力驱动和氢燃料驱动的车辆为研究对象,对这3种不同的研究对象又分别选取了3种类型的车辆。根据仿真目标建立了汽车仿真模型,并在MATLAB/SIMULINK环境下实现。仿真结果表明,汽车能耗随着质量减少而减少,驱动方式、车型、传动等因素对油耗也有很大的影响。  相似文献   

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基于ADVISOR电动汽车的开发和仿真   总被引:1,自引:0,他引:1  
基于电动汽车仿真软件ADVISOR,开发了双电机分散驱动轮式电动汽车ELVEC.ELVEC由车身、电动机、能量管理和能量存储(电池组)等模块组成.进行了ELVEC电动汽车的加速性能、爬坡能力、行驶车速和燃料经济性的分析.结果表明,该车具有良好的动力学性能和燃料经济性,适合在低速、频繁启动的市区内行驶.同时,对电动机特性和能量存储(电池组)及能量管理特性进行了仿真分析,得出ELVEC电动汽车的电动机、电池和驱动系统等均具有较高的效率,能源管理系统和模糊逻辑控制在能量的分配、管理上十分有效.  相似文献   

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The primary focus of this study is to investigate the control strategies of a hybrid system used in hydraulic excavators. First, the structure and evaluation target of hybrid hydraulic excavators are analyzed. Then the dynamic system model including batteries, motor and engine is built as the simulation environment to obtain control results. A so-called multi-work-point dynamic control strategy, which has both closed-loop speed PI (proportion integral) control and direct torque control, is proposed and studied in the simulation model. Simulation results indicate that the hybrid system with this strategy can meet the power demand and achieve better system stability and higher fuel efficiency.  相似文献   

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目前较先进的电动车充电站大都采用变电流间歇充电法,该法可以实现蓄电池的快速充电,但无法避免极化现象的产生,并且只能对几种固定电压和容量的蓄电池进行充电.为此,介绍了一种新型电动车充电站智能充电器的设计.系统采用波浪式变电压变电流正负零脉冲充电法;主电路主要由半桥逆变电路、放电电路和辅助电源电路组成;控制系统采用了PIC单片机,借助SG3525和霍尔传感器来实现充电控制. 该系统不仅避免了极板极化现象的产生,而且能对不同电压和容量的电池进行充电选择,还可以显示实时电量,从而更好地保护了蓄电池,提高了电动车充电站的交互性与智能性.  相似文献   

9.
柴油质量对柴油电控轿车的使用性能有重大影响.劣质燃油将会对发动机燃油系统、进气系统和排气系统的重要元件造成损害,导致发动机起动困难(或无法起动)、加速无力等故障.本文拟通过轿车故障案例的诊断,探索出油质问题引起的柴油电控轿车常见故障及其诊断和排除方法.  相似文献   

10.
汽车发动机加氢与富氧燃烧是当今节能行业研究的热点问题。通过热力学计算和对发动机排气系统改造,设计了一个化学反应系统,采集排气的高温热能,用于硫碘循环热化学水解制氢。使制取的氢气和氧气反馈到内燃机燃烧,其热效率达到43.5%,直接降低发动机油耗6.6%以上。  相似文献   

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发动机也叫引擎,是汽车启动和运行的动力装置,汽车的发动机也会随着汽车的不断老化而产生种种故障与问题,这对于汽车的安全行驶和日常稳定都会产生很大的影响。本文重点分析了汽车发动机日常出故障的原因、故障种类,以及维修措施等,倡导绿色行驶,关爱生命的理念。  相似文献   

12.
从汽车使用的角度研究节油措施。运用发动机原理、汽车理论等基础知识,通过对汽车启动、起步过程中发动机温度、负荷对燃油消耗影响的分析,规范了汽车启动、起步操作,强调电控燃油喷射发动机的启动不能踩油门,否则会加大燃油消耗;将汽车起步过程的离合器踏板控制过程规范为快-慢-快3个阶段:指出车辆低档、低速行驶比发动机无负荷高速运转更能缩短发动机热车时间,节油效果更好;明确了商务车空载二档起步可以节油,而乘用车采用一档起步才能节油的机理。  相似文献   

13.
锂离子二次电池技术近年来发展迅速。动力型锂离子二次电池是电动汽车、电动工具的电力来源,市场前景广阔。本文分析了在目前的电源技术水平下,锂离子二次电池在动力型应用上的优势和缺点,探讨了纯锂离子电池电动汽车所面临的问题以及可能的发展方向,指出在现有技术条件下,混合动力汽车是比较务实的选择。  相似文献   

14.
To fully take advantage of external charging conditions and reduce fuel consumption for extended-range electric vehicles, a charging management-based intelligent control strategy is proposed. The intelligent control strategy is applied to different driving patterns based on the various characteristics of urban roads. When the vehicle is driving on arterial roads, a constant power control strategy is applied. When the driver decides to go to a charging station, the extender-off time can be determined based on the current state of the vehicle and the distance to the charging station. When the vehicle is driving on an expressway, a power follower control strategy is applied. The range-extender engine is controlled to work over a wide variety of regions to obtain optimum fuel economy. The simulation results indicate that as the vehicle arrives at the charging station, the proposed charging management-based intelligent control strategy has made the state of charge reach the lowest permissible level after the driver made the decision to charge at the charging station. Therefore, the driver can charge the vehicle with as much clean electric energy as possible from the charging station.  相似文献   

15.
随着煤炭消耗、汽车消费、建筑消费的快速上升,我国城区大气污染严重,多数城市可入肺颗粒物PM25的年平均浓度超过35μg/m3国家二级空气标准限值。由于PM25表面积大、富集有害有毒物质、可在大气中长时间远距离漂移.对人体健康和大气环境质量影响很大。工业排放、汽车尾气和沙土扬尘是大气微细粉尘污染的3大主要来源。采用电凝并、移动电极、高频电源、脉冲电源等技术的电除尘器,能有效减少工业微细粉尘的排放。对于汽车尾气和沙土扬尘所产生的微细粉尘,必须从源头上进行综合治理。为了解决污染源较广、污染机理不清晰、治理难度较大等问题,对微细粉尘的产生过程及其危害进行了研究,并提出了针对性的预防与治理措施,为有效减少大气微细粉尘污染提供理论指导。  相似文献   

16.
煤炭洗选和火力发电是鸡西煤电基地建设中的两个重要产业项目。当前,在电力燃料紧俏的情况下,如果将滞销的煤炭洗选副产品"煤泥"加工成可用的电力燃料对两个产业均有利。阐述了开发煤泥用作电力燃料的可行性,提出了煤泥烘干技术的工艺方案并做了经济效益分析。  相似文献   

17.
桑塔纳2000Gsi轿车是现代新型的轿车,发动机采用最先进的电子燃油喷射系统。该系统的故障通过故障诊断仪读取,为彻底排除读取的故障,本文对电子燃油喷射系统的控制系统组件的检测进行了探讨。  相似文献   

18.
运动的汽车,受着地面给它的摩擦力作用,并在摩擦力作用下沿摩擦力的方向运动了一段位移。摩擦力对运动的汽车是否作功?本文从体动力角度和功的定义这一基本概念出发,分析了摩擦力对运动的汽车并不作功,但摩擦力却起到将汽车发动机中的内能转化为运动汽车的动能的作用。  相似文献   

19.
文章根据GK1c型内燃机车的特点,结合检修与运用实际,有针对性的从引起内燃机车起动困难的电气部分、燃油系统、调速器三方面原因进行技术分析,并提出处理方法,为内燃机车检修及运用中快速排除类似故障提供参考.  相似文献   

20.
采用SQLServer数据库,在.Net框架下集成开发了一种完全BS架构的电力燃料信息管理系统,该系统安全可靠且具有完备的功能及良好的用户界面。采用数据库、业务逻辑中间层、用户前端三层体系结构将传统的查询系统和业务处理系统无缝整合,适用于省级燃料管理部门及其下述电厂的分布式应用环境。  相似文献   

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