基于周向随动转向的汽车前照灯垂向随动转向规律研究

在前人关于汽车周向随动转向研究成果的基础上,进一步考虑前照灯远光落地照明有效区域问题,提出解决远光落地照明区域有效化的具体方案,并进行分析比较,选出解决远光照明区域有效化的方案,在此基础上建立前照灯垂向随动转向数学模型。     

雪铁龙C5各电控系统电路图解析(五)——随动转向前照灯系统电路

<正>(接2015年第2期)一、转向前照灯的作用在东风雪铁龙C5轿车上,装备有随动转向前照灯。图1是没有随动转向功能的前照灯照明情况,图2是有随动转向功能的前照灯照明情况。随动转向前照灯的光束具有根据转向盘的转动角度自动调整光束角度的功能,在近光灯或远光灯开启的状态下,汽车转弯时随动转向,使光束紧随行驶道路方向,为转向车辆行进的前方区域提供照明,其可提供双倍的视野照明宽度,大大提高汽     

凯美瑞轿车自适应前照明系统解析

随着社会的发展和技术的进步,汽车行驶的环境变得越来越复杂。道路限速不同、路面照明不同、行人密度不同、天气条件不同,使得传统上只具有近光和远光两种照明模式的前照灯,已无法满足人们日益增长的行驶安全需要。     

"汽车眼睛"的学问

汽车上装有各种照明设备和信号灯装置。各种信号灯装置作为“汽车眼睛”,直接反映了汽车的行驶方向、驾驶员的动机和意图。 前照灯 前照灯是汽车行驶时用以照亮前方道路的信号灯,其形状有圆形及矩形等,造型随车型而异。前照灯的装车形式有2灯制和4灯制两种。前照灯的作用是保证汽车前方100米以内的路面得到明亮而均匀的照明,使驾驶员能     

汽车前照灯的使用及检测

正1对汽车前照灯照明的基本要求为确保夜间行车安全,各国交通部门一般都以法规的形式对汽车前照灯提出如下基本要求:前照灯在夜间应保证车前有明亮而均匀的光照,使驾驶员能辨明车前100m以内路面上的任何障碍物,这个数据是根据汽车的行驶速度而定的。随着汽车速度的提高,要求汽车前照灯的照明距离也必须相应增长。目前汽车前照灯的照明距离已达200~250m。     

谈汽车前照灯的检修

夜间行车,驾驶员要看清路面情况,就必须开灯照明、而且需要足够的光源来照清前进的路面,以提高汽车在夜间行驶的能力和确保安全,因此前照灯是汽车不可缺少的电器设备。特别是在当前道路状况得到很大改善、高速公路越来越长、汽车行驶速度越来越高的情况下,更应重视汽车前照灯的技术状况。 汽车前照灯应保证夜间在车前有明亮而均匀的照明,使驾驶员能辨明车前100m左右道路上的任何障碍物;应具有防眩目装置、以免夜间两车交会时,使对方驾驶员目眩而发生事故。 对于前照灯光束照射位置不当,可采用屏幕检验的     

东风雪铁龙C5轿车随动转向前照灯工作原理

1随动转向前照灯简介1.1随动转向前照灯的作用东风雪铁龙C5轿车的发动机型号为ES9A,发动机ECU的型号为BOSCH ME7.4.7,装备有随动转向前照灯。图1是没有随动转向功能的前照灯照明情况,图2是有随动转向功能的前照灯照明情况。     

对汽车前照灯防眩目问题的探讨

汽车前照灯的照明性能要素,就是在会车时,在照亮自己的路面的同时,不给对方车辆驾驶者造成眩目;夜间在道路上行驶时,同时照亮道路的前方和两边.因此,前照灯是由交会时使用的近光和不会车时照亮前方路面用的远光构成的.随着车速的提高,前照灯的性能已成为保证汽车夜间安全行驶最重要的因素,它不仅要求设计结构先进,性能优异,还必须便于维护和调整,以确保其正确的工作状态.     

摩托车前照灯灯光试验方法的探讨

摩托车前照灯作为保护摩托车安全行驶的部件之一,它应该能够保证车辆既有夜间行驶的正常照明,又能避免会车时对对方驾驶员产生眩目,从而保证行车安全.我国现已制定了GB 5948<摩托车白炽丝光源前照灯配光性能>和GB 7454<机动车前照灯使用和光束调整技术规定>两个有关摩托车前照灯试验方法和检验规则的标准,同时在GB7258<机动车运行安全技术条件>中对前照灯照明装置也作了规定.但是,摩托车的夜间安全行驶不仅与前照灯部件的配光性能及前照灯在车辆上的安装位置、调整方式有关,还与摩托车的照明系统,即磁电机的功率有着直接关系.     

车迷热线

MTC先生:您好,我有一辆大阳DY125型摩托车,晚上直路行驶时前照灯工作正常,转弯时前照灯便会自动熄灭。我检查了前照灯供用电电路也没有发现任何问题,请问故障原因何在?平南平南:你好,摩托车照明系统的作用非常重要,摩托车在晚间行驶或通过隧道时,前照灯出故障将危及摩托车的行驶安全。大阳DY125型摩托车前照灯为全直流供用电方式,即磁电机发出的交流电经全直流整流器调节器整流,为蓄电池充电的同时以并联方式为前照灯提供照明电源。经前照灯开关的控制,照明正极电源输送至前照灯的近光灯丝及前照灯变光开关,变光开关控制远光灯丝正极电源的通断。然后必需通过接地线才能构成供用电回路。DY125摩托车前照灯供用电回路的接地线不是通过车架完成,它以接地导线作为接地回路线。     

Effect of Traction Force Distribution Control on Vehicle Dynamics

The purpose of this study is to clarify vehicle dynamics effected by traction force distribution, not only between the front and rear wheels but also between the left and right wheels. Contribution of traction force distribution to vehicle turning performance was investigated using a mathematical simulation and an experimental vehicle. The results indicates that the control of traction control distribution between the left and right wheels greatly influences vehicle turning characteristics and improve the performance even in a marginal turning condition.     

车辆动力转向系统非线性仿真研究

车辆液压动力转向系统通过伺服阀控制压力油的方向和流量,把转向盘输入的转角信号转变为车轮的偏转角度输出。在车轮偏转过程中,影响车轮偏转的力主要是地面摩擦力和轮胎的弹性变形力,因而动力转向系统所受干扰力的基本特性是非线性的,文中结合液压系统理论和Simulink控制系统仿真软件,计算并仿真了在非线性干扰力作用下的液压式动力转向系统的动态特性。     

Effect of Traction Force Distribution Control on Vehicle Dynamics

SUMMARY

The purpose of this study is to clarify vehicle dynamics effected by traction force distribution, not only between the front and rear wheels but also between the left and right wheels. Contribution of traction force distribution to vehicle turning performance was investigated using a mathematical simulation and an experimental vehicle. The results indicates that the control of traction control distribution between the left and right wheels greatly influences vehicle turning characteristics and improve the performance even in a marginal turning condition.     

汽车整体式转向梯形机构优化设计

以MATLAB软件为优化工具,通过对汽车整体式转向梯形进行合理设计,尽可能地保证汽车在转向过程中全部车轮均绕同一个瞬时转向中心行驶,使在不同圆周上运动的车轮,作无滑动的纯滚动运动。     

重型车双前轴转向梯形及杆系的设计与计算

转向梯形机构的几何参数决定汽车转向时内、外转向轮转角的几何关系,在汽车转向时,各车轮的转向必须保证纯滚动而无滑动,使各车轮的转角必须保证有统一的瞬时转向中心。本文主要概述了重型车双前轴转向梯形及杆系的设计与计算。     

SL6400A轻型客车驻车制动传动机构的改进

SL6400A轻型客车驻车制动器采用后桥车轮鼓式制动器，该车原驻车制动机构存在传动环节多、支座刚性差及拉索走向不合理等因素，致使左、右后轮制动力不平衡或不足，通过分析与对比，自行设计了一种新型驻车制动传动机构，该结构可通过平衡器的转动保证左、右后轮制动力不平衡或不足，通过分析与对比，自行设计了一种新型驻车制动传动机构，该结构可通过平衡器的转动保证左、右后拉索拉力相等。试验证明，驻车制动效果良好。     

Effect of the Controller Parameters on the Steerability of the Four Wheel Steered Car

The four-wheel-steering systems of the cars are becoming more and more wide-spread. In addition to the conventional 4WS systems (e.g. the steering-wheel-angle dependent four-wheel-steering and the speed dependent 4WS) there already exist some so called active 4WS systems. The front wheels and rear wheels are steered autonomously by the feedback compensation and in this manner the behaviour of the car during high-speed turning manoeuvre and under the side wind gust is improved. But what happens if some of the parameters of the car are changed? In the present paper, the author will analyze the system's response when the internal tyre pressure in the rear wheels is lower than the normal. Due to this the under-steered car becomes over-steered and the question is whether the control system is able to stabilize the motion of the vehicle.     

混凝土搅拌运输车行驶稳定性分析

针对混凝土搅拌运输车在行驶过程中,由混凝土偏心力矩引起整车重心位置变化,从而对车辆的行驶稳定性、车辆两侧轮胎所受载荷及拐弯行驶侧翻临界速度造成的影响进行分析,得到车辆在各种行驶状况下左右轮的承载百分比、车辆在拐弯状况下的侧翻临界速度和安全车速。结果表明：在行驶过程中,右旋搅拌车左右轮胎负荷较均匀;在拐弯半径一定的条件下,左旋车左拐弯最易翻车,右旋车右拐弯次之,拐弯时应在安全车速范围内行驶。     

Stationar- und Ubergangsverhalten von Sattel- und Lasttugen bei der Kreisfahrt: Lineare Berechnungen

ABSTRACT

Steady and Transient Turning of Tractor-Semitrailer and Truck-Trailer Combinations: A Linear Analysis

A simplified analysis is made of the yaw stability and control of the two types of the commercial vehicle combinations (tractor-semitrailer, truck-trailer) at a constant forward velocity during steady and transient turning. The combined vehicle is treated as a linear dynamic system (Fig. 2). The steer angle at the front wheels of the tractor (or truck) and the steady-state responses if the road verhicle train (yaw rate, articulation angles and sideslip angle) are calculated (Equations 18 to 25). Exploratory calculations are performed to determine the influence of the cornering stiffness of the tires for the two types of the vehicle combinations upon the steady-state responses (Figs. 7 to 10). For a linear simplified model of articulated vehicle the steady-state turning behaviour is stable also under conditions of rather high driving speed (70 km/h). A simplified analysis of the transient turning behaviour of the two types of road trains has shown the tractor-semitrailer to preserve stability even under driving speeds exceeding 70 km/h (Fig. 13), whereas the truck-trailer combinations appear to become oscillatory unstable if the driving speed rises above the 60 km/h margin (Fig. 14).     

Stationar- und Ubergangsverhalten von Sattel- und Lasttugen bei der Kreisfahrt: Lineare Berechnungen

Steady and Transient Turning of Tractor-Semitrailer and Truck-Trailer Combinations: A Linear Analysis

A simplified analysis is made of the yaw stability and control of the two types of the commercial vehicle combinations (tractor-semitrailer, truck-trailer) at a constant forward velocity during steady and transient turning. The combined vehicle is treated as a linear dynamic system (Fig. 2). The steer angle at the front wheels of the tractor (or truck) and the steady-state responses if the road verhicle train (yaw rate, articulation angles and sideslip angle) are calculated (Equations 18 to 25). Exploratory calculations are performed to determine the influence of the cornering stiffness of the tires for the two types of the vehicle combinations upon the steady-state responses (Figs. 7 to 10). For a linear simplified model of articulated vehicle the steady-state turning behaviour is stable also under conditions of rather high driving speed (70 km/h). A simplified analysis of the transient turning behaviour of the two types of road trains has shown the tractor-semitrailer to preserve stability even under driving speeds exceeding 70 km/h (Fig. 13), whereas the truck-trailer combinations appear to become oscillatory unstable if the driving speed rises above the 60 km/h margin (Fig. 14).