采用铝热喷涂反刺薄壁铸铁缸套的全新1.4 L发动机开发

为了实现发动机气缸体的紧凑性与轻量化,开发了外侧带反刺的全新铸铁缸套。同时对外壁喷涂铝,以增强导热性,并提高缸套与气缸体之间的结合力。无须重新设计气缸体和曲轴,仅通过采用新的缸套,发动机的排量可由1.25 L增大到1.4 L。新缸套增加了排量,但在外形尺寸和生产设施方面均无重大变更。     

多弹性支撑设备的同步定相振动控制研究（英文）

This paper describes an analytical investigation into synchrophasing, a vibration control strategy on a machinery installation in which two rotational machines are attached to a beam-like raft by discrete resilient isolators. Forces and moments introduced by sources are considered, which effectively represent a practical engineering system. Adjusting the relative phase angle between the machines has been theoretically demonstrated to greatly reduce the cost function, which is defined as the sum of velocity squares of attaching points on the raft at each frequency of interest. The effect of the position of the machine is also investigated. Results show that altering the position of the secondary source may cause a slight change to the mode shape of the composite system and therefore change the optimum phase between the two machines. Although the analysis is based on a one-dimensional Euler–Bernoulli beam and each machine is considered as a rigid-body, a key principle can be derived from the results. However, the factors that can influence the synchrophasing control performance would become coupled and highly complicated. This condition has to be considered in practice.     

海运教育与培训以及操船模拟器的国际展望

着重对操船模拟器的作用、技术条件、质量保证进行了专业分析,同时阐述了其在海运教育与培训中的作用,以及这两个领域的国际协作前景。     

美妙生涯 奥迪全新A6

毋庸置疑，今日的奥迪理应被认为是在世界各地享有盛誉的轿车制造商。然而这一切是怎样开始的呢？人们通过查阅现有的历史版本，就会不可避免的把目光聚焦到1968年。当时，这个来自因戈尔拖塔特（Ingolstadt）的年轻品牌将内部结构系列描述为C1的第一辆奥迪1OO轿车推向市场。在同一时代，来自斯图加特的南部之星一般被看作是公认的轿车领跑者，走在行业前列，还有有着蓝白螺旋桨标志的慕尼黑品牌，也在轿车市场占有一席之地。     

抓住关键

Chris Hrabalek 从一辆抛锚的法拉利Dino 246 GT 旁边驶过。他停下来和法拉利司机 Michael Stoschek 交流了起来。两个人一边修车，一边交谈着，很快这两位汽车爱好者就展开了新的计划，这次他们不想再仅仅只是收藏老爷车那么简单啦。Stoschek——国际化汽车零配件供应商博泽（Brose）的创始人和股东的孙子，他也是一位狂热的老爷车赛车手。     

喷油系统——满足未来排放目标的关键部件

无论是对于柴油机还是汽油机来说,尽可能优化混合气形成都是减少原始排放的重要前提条件。Volkswagen公司的研究成果表明,创新的直接喷射技术在这方面还有许多潜力可挖掘。     

重新审视砂再生

过去10年,美国环境保护机构已经对铸造工厂施加了更大的压力,以迫使他们减少废弃物的排出. 在金属铸造业,废砂占到整个铸造业废弃物总量的近70%.每生产1 t铸件,大约平均要用363kg砂,这就意味美国铸造工业每年大概要产出700～800万t废砂.