发动机缸体深孔加工的分析应用

发动机缸体的冷却在整个发动机工作中是非常重要的,由于设计需要,发动机缸体常设计有深孔,深孔加工困难。对柳州五菱柳机动力有限公司设计制造的LJ469缸体顶面深孔加工过程中的解决方法及工艺进行分析,得出使用高精度强力刀柄并加深引孔钻的方式可以解决深孔加工问题。     

发动机气缸盖气门座圈和导管孔加工实践及存在问题的改进方法

分析和论述了柳州五菱柳机动力有限公司采用加工中心作为主要加工设备,使用精密复合刀具来加工座圈与导管的工艺方法的实践过程,并记录在实践过程中所面临的问题,并提出解决的措施。经过生产实践论述证明:精密复合刀具的加工工艺生产效率高、生产成本低,适合于大批量生产要求,值得进行大范围的推广。     

LJ265MQ摩托车发动机的研制开发

主要介绍了LJ265MQ摩托车发动机的研制过程,及该产品在开发中如何结合柳州机械厂现有的LJ276M及LJ465Q汽油机的生产设备技术,充分发挥厂内存量资产的作用,保证工艺继承性及零部件的通用性,并对化油器进行台架匹配试验和整车匹配试验,对发动机动力性进行了标定。     

LJ265MQ摩托车发动机的研制开发

主要介绍了LJ265MQ摩托车发动机的研制过程，及该产品在开发中如何结合柳州机械厂现有的LJ276M及LJ465Q汽油机的生产设备技术，充分发挥厂内存量资产的作用，保证工艺继承性及零部件的通用性，并对化油器进行台架匹配试验和整车匹配试验，对发动机动力性进行了标定。     

LJ465QE1、LJ462QE1电喷发动机电脑控制系统电路分析

介绍了配置柳州五菱微型车的 LJ465 QE1、LJ462 QE1发动机电脑控制系统的控制内容 ,并对各项内容的控制电路的工作原理进行分析。     

五菱柳机

正公司简介ABOUT柳州五菱柳机动力有限公司(简称:五菱柳机)是广西汽车集团核心子公司,始建于1928年,是广西第一家机械制造企业,被誉为"广西机械工业摇篮"。目前公司产品涵盖6大平台汽油发动机、新能源动力总成及其零部件。主要产品有1.0L-2.0L黄金排量国六汽油发动机、电机控制器、驱动电机、插电式混动系统、48V微混系统、增程器等,是国内产品品种丰富、型谱完整齐全的动力总成供应商。     

电网谐波与无功功率的综合治理分析

针对柳州五菱柳机动力公司目前的两台中频炉的两路10 kV进线侧功率因数不达标、谐波污染严重的现象,为确保电网和电气设备的安全经济运行,采用由有源电力滤波器和高通滤波器组成的动态谐波治理和无功补偿综合解决的方法,与负载并联使用;从而对谐波和无功同时进行动态跟踪补偿。此次实践,实现了高电压、大电流的混合式有源滤波,提高了能源利用率,确保了电网和电气设备的安全经济运行。     

LJ166F汽油机应对排放法规的化油器优化方案

为应对欧美市场关于排放法规的要求,从技术可行性、成本及时间方面考虑,对LJ166F通用小型汽油机进行化油器的优化调整,在不影响动力性能的前提下,可使发动机满足美国环保署(EPA)所要求的排放限值。     

LJ465Q-2AE1汽油机满足欧Ⅲ排放标准的研究

LJ465Q-2AE1发动机是新研制开发达到欧Ⅲ排放要求的汽油机,它具有结构紧凑、升功率大、油耗低、转速高、噪声小等特点。笔者介绍了如何对该汽油机的燃烧系统、进气系统、点火系统及排气催化转化系统进行的优化设计。     

LJ469Q汽油机气门烧蚀故障分析

对汽油机LJ469Q在试验中发生气门烧蚀的相关故障件进行分析,找出了故障原因,希望对同类型汽油机的维护与保养提供参考建议。     

LJ465Q气缸盖凸轮轴孔精镗加工新工艺

介绍了利用工厂闲置设备，将CM6150精密车床改制成加工LJ465Q气缸盖精镗凸轮轴孔的半自动专用镗床及其所使用的夹具和刀具，解决了该工序的加工技术要求。充分达到节约成本，提高生产率目的。     

基于混合模式的汽车磁流变减振器阻尼特性分析与测试

根据牛顿流体模型和滨汉塑性流体模型 ,分别对混合工作模式的汽车磁流变减振器进行了理论分析研究。按照长安微型汽车的技术要求 ,设计和制作了汽车磁流变减振器 ,并对此进行了试验测试。试验结果表明 ,应用所提出的理论分析模型是可行的 ,对设计特殊阻尼特性的磁流变减振器有一定的指导意义。     

LJ491QE1汽油机提升性能的前期研究

通过对现生产的LJ491QE1汽油机的结构进行剖析,结合其特点,经过研究,拟通过增加气门数量、提高压缩比、提高汽油机的额定转速等方法,来达到提升LJ491QE1汽油机性能指标的目的。     

谐振箱对LJ465Q发动机进气系统影响的仿真研究

以LJ465Q发动机为基础,讨论了谐振箱容积的变化对发动机进气性能的影响,利用CFD软件对不同容积的谐振箱进行了仿真分析,得到了针对LJ465Q发动机的最佳谐振箱结构形式。     

汽车磁流变减振器设计原理与实验测试

根据磁流变体的滨汉塑性模型描述，提出了混合工作模式的汽车磁流变减振器的设计原理，按照长安微型汽车的技术和磁流变体的性能设计和制作了微型汽车磁流变减振器，并根据长安微型汽车前悬架减振器的技术条件对此进行了实验测试。实验结果表明，提出的设计原理是可行的，对设计特殊阻尼特性的磁流变减振器有一定的指导意义。     

Application of smart passive damping system using MR damper to highway bridge structure

Magnetorheological (i.e., MR) dampers are one of the most prospective semiactive control devices for civil engineering applications to earthquake hazard mitigation, because they have many advantages such as small power requirement, reliability, and low price to manufacture. A smart passive system based on an MR damper system without including a power supply, controller, and sensors consists of an MR damper and an electromagnetic induction (i.e., EMI) system that uses a permanent magnet and a coil. The electromotive force induced by movement of a structure can control MR damper effectively without any external power supply and control algorithm. This smart passive control system is implemented to verify the effectiveness for seismic protection of benchmark structural control problem for the seismically excited highway bridge, which is based on the newly constructed 91/5 highway over-crossing in Southern California. The results of the numerical simulations show that the presented control system can be beneficial in reducing seismic responses of benchmark bridge structure.     

Design and testing of an MR steering damper for motorcycles

This paper presents the design, fabrication and testing of a Magnetorheological (MR) steering damper for motorcycles. After exploring many possible configurations of the MR valve, the proposed design makes sure that the damper is test- and research- friendly in that the damper can be easily assembled and disassembled with simple tools and procedures. The structural and functional integrity of the damper was maintained even with the simple layout of the damper. The dimensions of the MR valve are optimally determined by using finite element analysis. The damper performance under steady shear is experimentally evaluated with an INSTRON test machine. The test results showed that the prototype had fulfilled the basic requirements of the desired MR fluid steering damper.     

Design considerations and experimental studies on semi-active smart pin joint

Hostile dynamic loadings such as severe wind storms, earthquakes, and sudden impacts can cause severe damage to many civil engineering structures. An intelligent structural system equipped with smart structural members that are controllable in real-time is an effective solution to structural damage and failure during such situations. Civil intelligent structures with controllable properties to adapt to any changes due to dynamic loadings can lead to effective protection of structures and their occupants. In this paper, design and testing of a semi-active magnetorheological (MR) pin joint, in which the moment resistance can be controlled in real-time by altering the magnetic field, is reported with the view of using it as a potential candidate for smart members in the development of intelligent structures. Design of prototype smart pin joints includes theoretical analysis related to the radius of the rotary plate, the property of MR fluids and the gap between the rotary plate and the casing based on the requirements of the dynamics of MR pin joints. FEM analysis was deployed to study the distribution of the magnetic field along the gap. It is found, from the theoretical analysis and experimental verification, that the MR pin joint with a diameter of 180 mm can produce a torque of up to 30 Nm, which meets requirements for semi-active members in a multi-storey prototype building model in the next stage of research and development.