The simulation results show that ga is effective for intelligent control and can judge the optimal gear shift position during vehicle running , and keep hydraulic torque converter always working in high efficient area 仿真结果表明：该算法收敛速度快，能够满足工程车辆对换档实时性的要求，可以根据车辆运行状态确定最佳档位，并能够保证液力变矩器经常工作在高效区。
The simulation results showed that the intelligent shift control could improve the powertrain efficiency of the engineering vehicle , and could overcome the low realtime behavior of neural network in the meantime 仿真结果表明，该控制方法提高了工程车辆液力机械传动系统效率，有效地克服了神经网络控制实时性差，难以在工程实际中应用的问题，实现了换挡控制的智能化。
This paper describes concept , systematic structure , prototype development procedures and key contents of virtual prototype technology in construction vehicle , and is a useful attempt in application of virtual prototype in construction vehicle 摘要论述工程车辆虚拟样机技术的概念、体系结构、样机开发流程和关键技术，对虚拟样机在工程车辆中的应用进行了有益的初探。
With a brief introduction to the proposal of home - manufactured vehicles , mechanical & electric equipment in the 1st phase of shenzhen metro construction , the author puts forward some views on the idea , the goal and the principle of home - manufactured equipment as a whole 摘要对设备国?化的思路、目标和原则提出了一些看法，并简单介绍了深圳地铁一期工程车辆及电设备的国?化方案。
Cleaning machine specially used for machineshop truck : this product is designed especially for cleaning machineshop truck with high - pressure water injection system and can go up and down and swing automatically for cleaning according to difference of car types and shape of car body 此产品为专业清洗工程车辆而设计，具有高压水喷射系统，并可根据车型的不同及车身之形状而自动升降摆动清洗。
According to the practical present development of engineering vehicles , concerning advanced technology and engineering applications of varieties of hydro - pneumatic suspension at home and abroad , the development and key technologies of hydro - pneumatic suspension is discussed and analyzed 根据工程车辆实际发展现状，结合国内外油气悬架系统先进技术及工程应用，论述了油气悬架研究的关键技术。
Cleaning machine specially used for machineshop truck : this product is designed especially for cleaning machineshop truck with high - pressure water injection system and can go up and down and swing automatically for cleaning according to difference of car types and shape of car body 工程车专用清洗机：此产品为专业清洗工程车辆而设计，具有高压水喷射系统，并可根据车型的不同及车身之形状而自动升降摆动清洗。
As the developing of human society , environment problems are increasingly drawing people ' s attention . as an environmental - protection vehicle , electric forklift plays an important role in field of modern material distribution , for its good maneuver ability and reliability 电动叉车作为一种环保型的工程车辆，以其优越的调速性能、良好的机动特性、极高的安全可靠性和良好的易用性，在现代物流领域中正发挥出日益重要的作用。
Cleaning machine specially used for machineshop truck : this product is designed especially for cleaning machineshop truck with high - pressure water injection system and can go up and down and swing automatically for cleaning according to difference of car types and shape of car body 垃圾车清洗机及工程车专用清洗机：此产品为专业清洗工程车辆而设计，具有高压水喷射系统，并可根据车型的不同及车身之形状而自动升降摆动清洗。
Jchi has cooperated with tadano ltd . of japan establishing a joint venture of bq - tadano ( beijing ) crane co . , ltd . to manufacture truck cranes and rough terrain cranes , and with singapore technologies kinetics for beijing zhonghuan kinetics heavy vehicles co . , ltd to off - road heavy dumpers and habour haulers 京城重工与世界著名起重机厂商日本株式会社多田野合资设立北起多田野（北京）起重机有限公司，生产汽车起重机和越野轮胎起重机；与新加坡科技动力设立合资企业中环动力（北京）重型汽车有限公司生产重型矿用汽车、港口牵引车等工程车辆产品。
