基于底盘测功机的某车型油耗试验分析

为了精确的测量汽车的燃油消耗量,利用底盘测功机模拟汽车在实际道路运行,严格按照汽车国家标准进行等速油耗试验,经过统计分析,得出底盘测功机模拟道路试验可以精确的测量汽车的百公里油耗。     

Mazda 6轿车底盘结构设计分析

对Mazda6轿车底盘系统结构特点进行了介绍。其前悬架系统采用A型高支点双横臂独立悬架，不同于传统机构之处在于其下控制臂为双铰点结构；后悬架采用独特的E型多连杆结构；后副车架在不增加质量的前提下提高了刚度与强度；采用的侵入最小的制动踏板机构系统能有效地减缓对驾驶员身体下部的冲击力；所装备的与行驶稳定性有关的控制系统能有效地提高整车性能。     

汽车底盘全自动集中加脂润滑系统

汽车底盘润滑脂全自动集中润滑系统，通过控制器润滑脂油泵工作将润脂提高压力，经分油器磅至各润滑点。它具有自动供油，能根据润滑点摩擦副的负荷和相对速度的大小自动定时定量加脂的优点，免去了人工加脂的诸多缺点。     

Design of Integrated Chassis Control logics for AFS and ESP

The performance of most electronic chassis control systems in the past has been optimized individually. Recently, a great research effort has been dedicated to the integration of chassis control systems in an effort to improve the vehicle performance. This involves orchestration of individual control modules so that they can jointly contribute to the enhancement of their control effect. In this research, two integrated control logics for AFS (Active Front Steering) and ESP (Electronic Stability Program) have been developed. Of the two logics, one uses a supervisor that rules over the individual modules. The other logic uses a CL (Characteristic Locus) method, which is a frequency-domain multivariable control technique. The two logics have been tested under various driving conditions to investigate their control effects. The results indicate that the proposed integrated control logics can yield vehicle performance that is superior to that of the individual control modules without any integration scheme.     

虚拟试车场技术预报载货汽车底盘耐久性研究

针对载货汽车开发过程中传统耐久性试验周期长、费用高的缺点,以某耐久性试车场道路为输入条件,应用虚拟试车场技术(VPG)建立了整车虚拟仿真模型.模拟分析载货汽车底盘动应力响应,并与相同路况下的实车试验测试结果进行了对比研究.结果表明,测试结果与VPG模拟结果在时域与频域上的趋势基本一致.在此基础上,运用疲劳分析软件FEMFAT4.7实现了对载货汽车底盘耐久性的有效预报.     

Vehicular emissions prediction with CART-BMARS hybrid models

Vehicular emission models play a key role in the development of reliable air quality modeling systems. To minimize uncertainties associated with these models, it is essential to match the high-resolution requirements of emission models with up-to-date information. However, these models are usually based on average trip speed, not on environmental parameters like ambient temperature, and vehicle’s motion characteristics, such as speed, acceleration, load and power. This contributes to the degradation of its predictive performance. In this paper, we propose to use the non-parametric Classification and Regression Trees (CART), the Boosting Multivariate Adaptive Regression Splines (BMARS) algorithm and a combination of them in hybrid models to improve the accuracy of vehicular emission prediction using on-board measurements and the chassis dynamometer testing. The experimental comparison between the proposed CART-BMARS hybrid model with the BMARS and artificial neural networks (ANNs) algorithms demonstrates its effectiveness and efficiency in estimating vehicular emissions.     

Chassis integrated control for active suspension,active front steering and direct yaw moment systems using hierarchical strategy

This paper proposes a novel integrated controller with three-layer hierarchical structure to coordinate the interactions among active suspension system (ASS), active front steering (AFS) and direct yaw moment control (DYC). First of all, a 14-degree-of-freedom nonlinear vehicle dynamic model is constructed. Then, an upper layer is designed to calculate the total corrected moment for ASS and intermediate layer based on linear moment distribution. By considering the working regions of the AFS and DYC, the intermediate layer is functionalised to determine the trigger signal for the lower layer with corresponding weights. The lower layer is utilised to separately trace the desired value of each local controller and achieve the local control objectives of each subsystem. Simulation results show that the proposed three-layer hierarchical structure is effective in handling the working region of the AFS and DYC, while the quasi-experimental result shows that the proposed integrated controller is able to improve the lateral and vertical dynamics of the vehicle effectively as compared with a conventional electronic stability controller.     

基于UG的客车底盘三维参数化总布置设计系统

介绍了在建立零部件图形库，底盘参数数据库，底盘设计标准库的基础上，通过UG软件进行二次开发建立的集成于UG环境下的客车底盘参数化三维总布置设计系统，该系统的研制在一定程度上实现了客车底盘的虚拟设计与虚拟开发，详细阐述了系统开发的基本原理和主要方法。     

一种实用新型底盘装配支撑结构的开发

底盘装配支撑应用于商用汽车底盘装配与工程机械车辆底盘装配,属于装配线附属工装设施。底盘装配支撑结构的适用性、可靠性、耐久性关系到底盘装配线的运行安全与运行效率。文章结合公司在建底盘装配线工艺验证问题整改,对底盘装配支撑结构进行优化,开发出一种适用于驱动桥桥包支撑的实用新型支撑结构。     

底盘测功机摩擦功率测试方法研究

在分析美国BAR 97和我国在用车工况法排放检测有关标准中关于底盘测功机摩擦功率测试方法优缺点的基础上,提出适用于ASM稳态加载工况和IG195瞬态加载工况加载测试、恒加载滑行测试和变载荷滑行测试的摩擦功率测试的新方法,给出了计算公式。在某底盘测功机上的多次测试表明,该方法方便可行,摩擦功率计算更准确。