大众奥迪车系自动变速器常见故障分析（五）

一辆2006款奥迪Q7 4．2L越野车搭载使用日本AISIN AW公司生产的型号为TR-60SN（大众命名09D）型6速手／自一体式变速器。 故障现象：初始时是自动变速器油泵前油封漏油。后来是更换油封后前进挡和倒挡均不能行驶。维修后有时变速器偶尔还会锁挡。     

二灰砂砾混合料组成设计研究

采用薄弱夹层分析法对二灰稳定类材料组成特点进行分析,以揭示材料强度增长三阶段特点,并从空间组合角度阐释混合料二级分散系的结构特点,提出与混合料路用性能密切相关的材料组成参数——二灰胶砂合理富余量指标,进而提出基于使用性能的混合料组成设计方法.室内测试分析证明:基于二灰胶砂富余量的混合科使用性能与胶砂富余量密切相关.     

选择合适的电涡流缓速器，提高城市公共汽车的安全性

1电涡流缓速器工作原理 电涡流缓速器工作原理是：装于汽车传动系中的转子切割定子线圈的磁力线，在转子中产生电涡流，使转子发热，同时产生与传动轴转向相反的阻力，并完成机械动能向热能转化，使车辆减速。     

汤姆轮超常规水上保舵与舵承的修理

修船过程中，经常会碰到意外的困难，本文以实例介绍了超常规水上保舵的生产过程。     

51800DWT冰区加强型化学品/成品油船自动舵系统调试

本文介绍了51800DWT冰区加强型化学品/成品油船自动舵系统的系统组成,以及在安装调试过程中的主要问题和分析解决方法。     

Research and application of non-clay low damage temporary bridging drilling/ completion fluids system

Following the basic theory of protecting gas-reservoirs from damage with the temporary bridging technology, inert calcium carbonate (CaCO3) particles, whose diameter is consistent with the size of pores or apertures in the reservoir, were selected as the bridging agent, and modified resolvable starch was selected as filtration loss reducing particles to form the non-clay low damage temporary bridging drilling/completion fluids system (NLTDFS). Under the simulated condition of the well bottom during real drilling, NLTDFS was used to conduct dynamic and static damage experiments of cores for 48 hours, respectively, and then the experimented cores were permeated with pure nitrogen from the undamaged end to the damaged one to measure their recovery of permeability. The results showed that the permeability recovery rate of the core reached 90% or so, and the damaged depth was less than 1 cm, which demonstrates that NL TDFS has higher temporary bridging effectiveness and lower damage to the gas-reservoir than other drilling fluids system. NLTDFS has been used to drill many horizontal wells, and four of them have obtained high yield of natural gas. The yield of natural gas of LPl well reached 85 X 104 m3/day after completion with the rump pipe. The formation of the stable well wall and smooth drilling led to an API loss less than 4 mL and an HTHP loss less than 15 mL.     

新BMW 3、X5、X3荣膺美2009年度最安全车型奖

2008年11月25日，宝马北美公布．2009款BMW3系轿车、BMWX5和BMWX3在美国高速公路保险安全协会（IIHS）的碰撞测试中均达到相应车型级别的最高标准，获得该协会年度“最安全车型奖”。     

200 km/h电力机车转向架一系悬挂设计分析

介绍了200 km/h交流传动电力机车转向架一系悬挂系统的选型分析和结构设计,阐述了转向架一系悬挂系统参数的优化设计及其对机车动力学性能的影响.     

超级B级车 上海大众斯柯达昊锐2.0TSI

德国车的特色在哪里?当然是技术与性能。日系车的卖点是什么?肯定是性价比喽。若有二者兼得之车,岂不快哉?大众旗下斯柯达品牌,便是如此让人快哉的车企,而其最新国产的昊锐,更是一款极具杀伤力的"超级B级车"。     

赢创全新推出绿色环保型聚酰胺--VESTAMID~ Terra

总部位于德国埃森的赢创工业集团为其VESTAMID 家族又添新成员：基于生物原料的聚酰胺系列产品VESTAMID Terra。