摩擦片式防滑差速器转矩特性对汽车操纵稳定性的影响研究

进行了摩擦片式防滑差速器防滑转矩输出特性测定试验,并分别对装有摩擦片式防滑差速器和普通差速器的汽车,通过试验测定的车厢侧倾角、转弯半径比、前后轴侧偏角差值、横摆角速度及侧向加速度作为对比参数,研究了摩擦片式防滑差速器转矩特性对汽车操纵稳定性的影响。结果表明,摩擦片式防滑差速器能够显著提高汽车的动力性、通过性,改善汽车的操纵稳定性。     

马自达故障六例

一、马自达323LX轿车摩擦片式差速器无法锁止故障现象一辆马自达323LX轿车行驶在泥泞的陡坡上,出现后桥一侧车轮打滑,汽车无法行驶的现象。故障分析与排除该车装置有摩擦片式差速器。它是普通锥齿轮差速器的变型,是通过增加差速器内的摩擦力来实现差速器锁止(即防滑)目的。为了增加差速器的内摩擦力,在半轴齿轮和差速器壳之间装有主从动摩擦片和推     

转矩敏感式限滑差速器结构性能分析及其评价

介绍了限滑差速器的分类.着重对转矩敏感式限滑差速器的3种主流产品--锥盘式、轮齿式和摩擦片式差速器的结构与工作原理进行了探讨.在此基础上,提出了转矩式限滑差速器的性能评价参数和性能曲线,为对转矩式限滑差速器的进一步研究提供参考.     

非圆锥齿轮防滑差速器动力学分析

以变传动比非圆锥齿轮防滑差速器为研究对象,根据非圆锥齿轮防滑差速器的工作原理建立非圆锥齿轮防滑差速器系统的动力学模型,通过在Matlab中求解动力学模型对非圆锥齿轮防滑差速器的动力学性能进行分析,并通过ADAMS运动仿真验证所建立的动力学模型的正确性。     

国内外防滑差速器的应用分析

阐述了防滑差速器的基本功用和工作原理，介绍了防滑差速器的分类情况，列出了目前国内外几种主流防滑差速器的结构和应用情况，提出了国内防滑差速器的研究方向以及应采取的措施。     

越野汽车蜗轮蜗杆式限滑差速器的研究

蜗轮蜗杆限滑差速器克服普通锥齿轮差速器平均分配转矩防滑性能差的缺点,有效地提高了汽车的通过性和安全性。首先对限滑差速器和普通锥齿轮差速器性能进行分析比较,然后介绍了蜗轮蜗杆差速器的结构、工作原理、转矩分配原理以及性能评价指标,最后以某越野汽车为实例对其蜗轮蜗杆差速器进行设计计算。     

Question ＆ Answer

<正>Q:我想为我的车安装一套机械式LSD(防滑差速器),听说这种差速器分为三种类型,请编辑老师帮忙介绍一下各类型都有什么特点?另外,防滑差速器和中央差速器一样吗?(天津读者:孙庆丰)     

起动机单向啮合器的改进设计

一、三种单向啮合器的比较汽车起动机常用的单向啮合器为滚柱式、摩擦片式和弹簧式三种,其性能比较见表。弹簧式啮合器只宜在大型起动机上采用。摩擦片式啮合器传递扭矩虽然较大,但是成本较高,在使用中需经常调整,目前应用在中、小功率的汽油机上,但其在扭矩、可靠性等方面还存在一些问题。     

乘用车传动系统(二)

<正>离合器与轮胎、制动器一样,都属于磨损件,它们的寿命在很大程度上取决于驾驶习惯和使用条件。在操作、保养和安装时,只有按照说明小心操作并正确安装,它们才能发挥正常的功效。多片式离合器(双片式膜片弹簧离合器)高转矩的大功率发动机和运动驾车方式对离合器的耐热能力和动力传递安全性提出了极高的要求。由于摩擦面半径受到结构限制,不可能无限制地增大,使用多片式离合器可以满足使用要求并减小安装尺寸。通过增加摩擦面数量,可有效提高离合器的转矩传输能     

一汽柳特重型自卸汽车防滑转装置的使用

一辆一汽柳特重型自卸汽车，因底盘故障到我处维修，经拆检发现，该车中桥差速器行星齿轮和半轴齿轮严重损坏。通过对机件损坏情况进行分析，并了解该车的使用情况，发现该车故障是由于驾驶人员没有按照规范要领正确使用差速器防滑转装置而造成的。     

导球式限滑差速器结构及工作原理

限滑差速器可提高汽车驱动性、通过性及操纵稳定性。简述了车用限滑差速器的分类及其优、缺点。导球式限滑差速器是近年新出现的一种结构简单的转矩敏感式限滑差速器。介绍了导球式限滑差速器的结构,论述了其差速运动及限制滑动的原理。     

粘性液压联轴节特性分析与应用研究

系统地介绍了新型速度感应式限滑差速装置——粘性液压联轴节Visco-Lok，该装置存速度感应式限滑差速器基础上，在高转速差时通过加装剪切泵增大了限滑扭矩，提高了该工况下的牵引性，较好地实现了不同转速差下对车辆操纵稳定性、制动稳定性和牵引通过性的综合要求，并通过实车试验得到了验证。     

Development of a new limited slip differential

A new limited slip differential was developed by Fuji Univance Corp. in co-operation with Automotive Products plc, which has a simple structure and applied special cams.The limited slip differential has a constant torque bias ratio regardless of the input torque. This paper presents its structure, principle of operation, analysis results of design parameters on the torque bias ratio characteristic, and experimental results.     

Development of evolutionary cone type LSD for SUV/RV utilizing the axiomatic approach and the ultrasonic nano crystal surface modification technology

Surface topology, cone angle and the forces acting on the cone of the clutch type limited slip differential (LSD) are major design parameters for the bias ratio and the noise condition. Therefore much research has been dedicated to these developments but the results have been used to submit patents. A new cone type limited slip differential for sport utility vehicles and recreational vehicles, which has a very simple structure and easy compliance with the vehicle performance, has been developed by the axiomatic approach and the ultrasonic nano crystal surface modification (UNSM) technology. The design criteria and optimal value of the design parameters are determined by the axiomatic approach utilizing CAE tools. Test methodologies in a test rig and in a vehicle were also developed. Test results showed good performance of bias ratio and noise level but durability is still under testing. This study is an extension of F2006P266, FISITA 2006.     

Development of a hydraulic limited slip differential system using a pressure generator

The limited slip differential (LSD) is a device that enables the driving force to be transmitted from one slipping wheel to the other by temporarily restraining the differential function when unwanted slipping occurs on muddy or icy roads. Many types of LSD have been developed, such as mechanical lock, disk clutch, viscous coupling, torsen and multiple clutch. This study designed a new type of hydraulic LSD using a pressure generator base on a trochoid gear pump and evaluated the performance of the new design.     

转矩式限滑差速器对后轮驱动汽车操纵稳定性影响的研究

采用7自由度车辆动力学模型,对装用JA1020LSD型转矩式限滑差速器的后轮驱动汽车进行了操纵稳定性研究。通过仿真分析和道路试验研究表明:装用限滑差速器后增加了后轮驱动车辆的不足转向趋势,即改善了操纵稳定性,但转向力矩略有增加。     

Optimisation of handling and traction in a rear wheel drive vehicle by means of magneto-rheological semi-active differential

This paper presents a semi-active differential, magneto-rheological fluid limited slip differential, which allows us to bias the torque between the driving wheels. It is based on the magneto-rheological fluid employment, by which it is possible to change, in a controlled manner, the internal friction torque and, consequently, the torque bias ratio. This device is an adaptive one and allows us to obtain an asymmetric torque distribution in order to improve vehicle handling. The device modelling and the control algorithm, realised for this activity, are described. The illustrated results highlight the advantages that are attainable regarding directional behaviour, stability, and traction.     

基于主动安全的轮间电控限滑差速器控制方法研究

论述了电控限滑差速器(ELSD)改善汽车动力学特性的原理,提出了基于提高汽车主动安全性的控制方法。该方法利用前馈与误差反馈控制相结合来控制车辆运动状态。反馈系数根据最优控制的方法确定。通过对所述控制系统的仿真研究,证明该系统在各种路面条件下均可明显改善汽车的操纵稳定性与主动安全性。     

Judder analysis of electronically controlled limited slip differential

The electronically controlled limited slip differential system used on the new Skyline contributes to improvements in vehicle dynamics. One important performance parameter that is improved is the start-off acceleration when one drive wheel is on an ultra-low friction surface. There was concern, however, that larger LSD torque might cause drivetrain judder due to the negative μ-v slope of the wet multiplate clutch used in the system. An analysis based on natural mode calculations clarified the mechanism generating judder, and the results of stability calculations revealed measures for improvements. As a result, the problem of self-excited vibration was resolved.