越野汽车动力总成匹配仿真研究

提出了越野汽车驱动轴（主减速比）、变速器的最大传动比、最小传动比和中间各挡的传动比等速比选配原则。应用选配原则,对某四轮驱动的越野汽车进行仿真分析,并根据该分析方法,得出了较好的结果。     

Development of a twin-accumulator hydro-pneumatic suspension

A twin-accumulator hydro-pneumatic suspension has been developed based on the off-road vehicle in order to meet the requirements of ride comfort. The working principle and elements construct of the developed suspension are studied. And then,a mathematical model of the developed suspension is built. The influence of twin-accumulator hydro-pneumatic suspension parameters on the vehicle body vertical acceleration,suspension travel and dynamic tyre load is studied by simulation based on a quarter off-road vehic...     

越野赛车前碰撞特性仿真分析

针对越野赛车车架的强度和刚度的合理匹配问题,利用ANSYS软件建立了美国某Mini-Baja越野赛车前碰撞的有限元模型,模拟该车在乡村路面上以48km／h的速度撞树的情况,得到了碰撞过程中前横梁的位移、速度随时间变化曲线及整车应力分布图．模拟结果表明：该车车架材料的强度和刚度达到了美国FMVSS203安全法规的要求;采用有限元软件ANSYS对小型越野赛车进行碰撞分析,为材料强度和刚度的选择提供了有效的手段．     

浅谈某型重载越野底盘设计特点分析

根据使用环境特点,针对性设计某车型越野底盘的结构,对该越野底盘的主要性能、结构、特点进行分析,使底盘性能具备良好的动力性、承载性能、路况适应性,结构上满足改装要求,适应使用环境等特点,分析保证底盘的各项部件的匹配,具备相应的系统设计特点。     

Influence of the transmission configuration of a multiple axle vehicle on the obstacle surmounting capacity

Conventional wheeled vehicles have serious mobility limitations in rough terrain while walking vehicles have inherent drawbacks such as a high number of DOF and actuators, control complexity and low-energy efficiency. Vehicles that passively adapt the position of multiple wheels to maintain contact with the ground can be a good compromise between both conventional wheeled and walking vehicles. One way to increase the number of wheels in contact with the ground is using bogies. However, the kinematics of a multiple axle vehicle moving on irregular terrain is quite complex since every wheel can require different angular speed to avoid slippage. The present work aims to quantify the obstacle surmounting capacity of a four axle, double-bogie vehicle depending on the transmission configuration, since it can provoke the slippage of some of its wheels.

Some results are presented corresponding to the vehicle moving on a straight upward slope of different angles and facing variable obstacles in any of its axles.

It can be observed that as more restricted the transmission is, more wheels are forced to slip and less traction the vehicle has, and, as a consequence, less obstacle surmounting capacity.     

Ride dynamic evaluations and design optimisation of a torsio-elastic off-road vehicle suspension

The ride dynamic characteristics of a novel torsio-elastic suspension for off-road vehicle applications are investigated through field measurements and simulations. A prototype suspension was realised and integrated within the rear axle of a forestry skidder for field evaluations. Field measurements were performed on forestry terrains at a constant forward speed of 5 km/h under the loaded and unloaded conditions, and the ride responses were acquired in terms of accelerations along the vertical, lateral, roll, longitudinal and pitch axes. The measurements were also performed on a conventional skidder to investigate the relative ride performance potentials of the proposed suspension. The results revealed that the proposed suspension could yield significant reductions in magnitudes of transmitted vibration to the operator seat. Compared with the unsuspended vehicle, the prototype suspended vehicle resulted in nearly 35%, 43% and 57% reductions in the frequency-weighted rms accelerations along the x-, y- and z-axis, respectively. A 13-degree-of-freedom ride dynamic model of the vehicle with rear-axle torsio-elastic suspension was subsequently derived and validated in order to study the sensitivity of the ride responses to suspension parameters. Optimal suspension parameters were identified using the Pareto technique based on the genetic algorithm to obtain minimal un-weighted and frequency-weighted rms acceleration responses. The optimal solutions resulted in further reduction in the pitch acceleration in the order of 20%, while the reductions in roll and vertical accelerations ranged from 3.5 to 6%.     

一种新型重型越野汽车的可活动上车踏板结构设计

重型越野汽车通常需要将第一阶上车踏板设计成活动的。由于重型越野汽车的使用环境非常复杂,因此活动上车踏板需要性能可靠耐用。本文所描述了这样一种新结构上车踏板。     

程序控制的分动箱高低档切换方法研究

传统的分动箱高低档切换是靠驾驶员主观经验进行,势必造成分动箱在切换过程中的损坏。本文介绍一种以车辆控制器为核心,车辆行驶数据为判断依据,由车辆控制器进行逻辑运算,控制低档电磁阀使分动箱在安全的条件下完成高低档切换的方法。     

某轻型越野车间歇刮水及喷洗器控制电路抗电磁干扰改进设计

某轻型越野车刮水电动机受大功率电台电磁干扰产生误动作。本文通过对该问题现象和间歇刮水及喷洗器控制电路进行分析,确定了产生问题的原因,然后对该车的间歇刮水及喷洗器控制电路进行改进,并进行了试验验证。结果表明：本改进设计实施容易、成本低、可靠性高,节约了时间和费用。     

越野车驾驶室电器用检测器

介绍对越野车驾驶室电器进行预先检测的重要性,详细论述一种新型越野车驾驶室电器用检测器的设计思想、基本结构、工作原理和使用方法。应用该检测器对驾驶室的电器进行检测,操作简单、方便,减轻了产品检验的工作难度和劳动强度,提高了工作效率。