浅析新能源汽车发展现状及发展趋势

以新能源汽车发展现状和发展趋势为主线,详细介绍了当前各类新能源汽车的技术特点,并在此基础上系统地分析了未来新能源汽车的发展前景。最后,在权衡目前的技术状态和未来新技术的可行性后,分析了汽车工业发展的趋势。     

Mitigating the effect of impact loading on a vehicle using an essentially nonlinear absorber

The aim of this study is to investigate the ability of an essentially nonlinear vibration absorber to mitigate the large accelerations transmitted to a passenger compartment of a vehicle which is subjected to shock-type transient loading at the chassis. For such problems, the induced vibration typically attains its maximum value shortly after the application of the loading; thus, it may be impossible to dissipate a major portion of the input energy prior to the occurrence of the peak response. Here, a class of absorbers possessing a form of discontinuous essential stiffness nonlinearity is employed to achieve the desired mitigation. In this paper, we apply a single vibro-impact (VI) absorber to the chassis and examine whether the resulting energy transfer mechanism is an effective way to reduce the peak value of the inertial force measured at the passenger compartment. The influence of the absorber parameters is first studied based on a practical impulsive force, and the optimal design of the absorber is then obtained. Next, an asymmetric clearance arrangement of the absorber is suggested to facilitate the mitigation. Finally, an impulsive acceleration excitation is applied to the system to examine the robustness and efficacy of the optimised absorber. Results of numerical simulations demonstrate that a properly designed VI absorber can significantly decrease the maximum inertial force at the passenger compartment, generated by external impulsive excitations.     

Stability enhancement and fuel economy of the 4-wheel-drive hybrid electric vehicles by optimal tyre force distribution

In this paper, vehicle stability control and fuel economy for a 4-wheel-drive hybrid vehicle are investigated. The integrated controller is designed within three layers. The first layer determines the total yaw moment and total lateral force made by using an optimal controller method to follow the desired dynamic behaviour of a vehicle. The second layer determines optimum tyre force distribution in order to optimise tyre usage and find out how the tyres should share longitudinal and lateral forces to achieve a target vehicle response under the assumption that all four wheels can be independently steered, driven, and braked. In the third layer, the active steering, wheel slip, and electrical motor torque controllers are designed. In the front axle, internal combustion engine (ICE) is coupled to an electric motor (EM). The control strategy has to determine the power distribution between ICE and EM to minimise fuel consumption and allowing the vehicle to be charge sustaining. Finally, simulations performed in MATLAB/SIMULINK environment show that the proposed structure could enhance the vehicle stability and fuel economy in different manoeuvres.     

水库附近矿山法隧道抗水压衬砌结构研究

目前我国出现了大量的城市下穿隧道,但由于各城市间水文地质条件的差异性较大,既有的工程设计与施工经验不能生搬硬套,而应结合项目自身及周边环境的特点有针对性的展开研究,如何有效平衡地下水的适量排放与衬砌结构安全性、经济性的合理统一,对隧道设计至关重要.但是目前的防排水系统及防水衬砌设计等关键技术在城市地下空间建设过程中研究...     

“1+X”证书制度下的汽车检测与维修专业“三教”存在问题研究

在教学过程中,师资,教材,教法是基本内容,教学质量指标也受到影响。本文以新能汽车检验维修专业为例,对职教二十条进行了分析。职业教育三教一体化改革的重要性,同时,针对教师,教材和教学方法等问题提出了切实可行的改革思路,仅供相关人员参考。     

纯电动汽车故障诊断案例分析

纯电动汽车作为市场上最普遍的新能源汽车,厂家大量生产,深受消费者的喜爱,要推动纯电动汽车的持续发展,必须要提高纯电动汽车的售后维修服务质量.维修人员要掌握纯电动汽车好的结构原理、检测维修技术,从而提升售后服务质量.本文从纯电动汽车故障诊断案例入手,分析纯电动汽车的维修检测方法,以供纯电动汽车维修人员参考.     

新能源汽车维修中电子诊断技术的应用

新能源汽车属于新型汽车,近几年开始进入到我国汽车行业中并不断发展。为此,本文首先分析了电子诊断技术在新能源汽车维修中的应用优势,其次分析了电子诊断技术在新能源汽车维修中的应用类型及方式,旨在为电子诊断技术在新能源汽车维修中的应用提供参考,以此来提高新能源汽车维修质量和效率。     

探索新能源汽车充电设施的电气设计

现如今,新能源电动汽车充电装置电气设计,得要顺应现代化实际需求与发展趋势.在后期发展阶段之中,新能源汽车会引领着整个汽车行业的发展,当然也可以凸显出节能减排、绿色出行的优势.因此在新能源项目发展阶段之中,针对新能源汽车充电设施实施电气设计至关重要.鉴于此,本文主要分析新能源汽车充电设施的电气设计.     

基于用户认知的新能源汽车内饰研究

在体验经济时代(在消费过程中追求顾客满意、注重自我体验),新能源汽车作为汽车行业的新兴产业,不断受到人们的追捧,其内饰比外观更为重要.在新能源汽车的内饰中,许多零部件具有不可替代的互动性,这也是用户了解新能源汽车内饰的关键因素之一.在智能化时代的背景下,大多数新能源汽车制造商单纯地将智能技术应用到新能源汽车上,其内饰造...     

新形势下我国新能源汽车政策现状与发展趋势研究

汽车产业作为我国重要的经济支柱产业,在我国的经济发展和国家发展中发挥了重要的作用,为了寻求产业发展和能源消耗之间的平衡,新能源汽车的概念应时而生.特别是在当前我国各方面建设都进入新常态的形势下,推进新能源汽车的进一步发展,是现在我们必须要认清的一个很迫切的问题,也是一个很现实的问题.