Barrier-Free Boarding 无障碍上下车
Prototype car of CTA 7000 manufactured by CRRC Sifang
由中车四方生产的CTA 7000车辆
由中车四方生产的CTA 7000车辆
The new light rail vehicles manufactured by CRRC Sifang for the Chicago Transit Authority (CTA) will offer barrier free boarding and exiting, as they will be fitted with an intelligent hydraulic level control system from Liebherr.
中国中车四方为芝加哥交通管理局(CTA)生产的新型轻轨车辆提供无障碍的上下车服务，利勃海尔将为配备智能的液压控制系统。
Recently, the commissioning of the CTA 7000 trains have started and the Liebherr team is working closely together with its customer CRRC Sifang, providing the train manufacturer with the best possible on-site service in order to enable a successful introduction of the new CTA 7000 fleet in Chicago, Illinois (USA).
最近，CTA 7000列车已经开始调试，利勃海尔团队正与客户中国中车四方紧密合作，为列车制造商提供尽可能最好的就地服务，以确保在美国伊利诺伊州芝加哥市成功引进新的CTA 7000机组。
The responsible Liebherr system engineer on site, Dr. Ernst Hoffmann, is working with CRRC in Qingdao and points out the special benefit of this activity: “Taking part in the commission work on site allows me to see our hydraulic level control system operating properly, which provides both, CRRC and the Liebherr Team real pleasure and satisfaction.”
负责利勃海尔系统的工程师Ernst Hoffman博士,与中车青岛在现场一起工作。并且他指出了这个项目的特别之处:“当我真正参与到这个项目的实地现场时，使我看到我们的液压控制系统正准确地操作, 利勃海尔团队与中国中车的合作收获了真正的快乐和满足。”
How it works 操作原理
The intelligent hydraulic level control system made by Liebherr adjusts the level of the vehicle floor to the level of the station’s platform.
利勃海尔公司研制的智能液压控制系统，可根据站台高度调整车辆地板的高度。
Liebherr’s hydraulic level control system for CTA’s modernized 7000 series urban rail vehicles is able to adjust the level of the vehicle floor to exactly that of the platform. No easy task for the system, considering that a full vehicle can carry a total weight of up to 36 tonnes on the tracks. In addition, the platform heights differ from station to station. The vehicle load can also have a spreading width of up to ten tons. This loading condition has the effect of compressing the vehicle springs - designed as steel compression springs - more or less, i.e. the carriage is higher or lower.
利勃海尔公司为现代化CTA 7000系列城市轨道车辆设计的液压控制系统，能够将车辆地板的液位精确调整到站台的液位。考虑到一辆整车在轨道上的总重量可达36吨，这对该系统来说并非易事。此外，站台的高度因站而异。车辆负载也可以有高达10吨的扩展宽度。这种加载条件会对车辆弹簧产生或多或少的压缩作用，即导致车厢或高或低。
In order to be able to adjust precisely the floor height to that of the platform, not only it is important to know the height position of the vehicle, but also it is important to determine the different heights of the platforms. For this purpose, position sensors are installed on the vehicle. When the carriage arrives at the train station, the sensors detect the platform height. Based on this height measurement, Liebherr’s level control system activates four hydraulic actuators per carriage, each of which pulls six tons of steel springs together between the carriage body and chassis to lower the vehicle until the exit edge exactly matches the height of the platform.
为了能够精确地根据站台的高度调整地板高度，不仅需要知道车辆的高度位置，还需要确定站台的不同高度。为此，车辆上安装了位置传感器。当车厢到达列车站时，传感器会检测站台的高度。基于这种高度测量，利勃海尔的液压控制系统激活了每节车厢的四个液压致动器，每个致动器将六吨重的钢弹簧拉到车身和底盘之间，使车辆下降，直到车辆出口边缘与站台高度完全匹配。
After all passengers have got on or off barrier-free and thus comfortably, the doors then close and the hydraulic cylinders release the steel springs. The springs move the carriage back to its starting position and the train can leave the station.
当所有的乘客都能够无障碍地舒适地上下车后，车门关闭，液压缸释放钢弹簧。弹簧使车厢回到它的起始位置，车辆就可以离开车站了。
Similar systems from Liebherr-Transportation Systems have already been operating reliably for many years in various cities in North America and make the life easier for many passengers.
更多类似系统利勃海尔运输已经在北美多个城市可靠运行多年，使乘客们的生活更加方便。
