【正文】 , etc., air suspension with automatic adjustment, and basic domestic or leaf spring, a better use of the rubber suspension. 1. Transmission System Main Foreign is automatic transmission. China mainly with manual gearbox, there are some manufacturers began to try to configure the chassis automatic transmission. 1. Braking Systems Electric control system mainly foreign (ECBS) and air disc brakes and ABS electronic control system installed. China mainly uses drum brakes, ABS, electronic brake system installed in the smaller, but also began developing the disc brake manufacturers. (4)Body Systems Dump Truck body of domestic fort than the gap in Europe is still a great car. But highend cab, driving and ride fort has been greatly improved than before. 2. Specialization Exclusive of foreign Dump Truck classification is increasingly apparent. In addition to general engineering of Dump Truck, but also according to the needs and purposes century, the development of a dedicated is Dump Truck. (1)Road salt cleaning truck Of snow, snow days will be transported to the road salt, snow o n the road sweeping, snow spraying of salt. (2) Class of fluid transport truck pollution Achieve pollution class fluid collection, transportation and dumping, can better protect the vehicle chassis, suitable for road paving and construction of the gravel material transport. China Dump Truck of professional classification is not very clear that the Dump Truck currently mainly used in construction, mining, coal transportation, and its degree of specialization than the foreign classification there a larger gap. 3. Structure Optimization European highstrength steel materials often used Dump Truck or a Ushaped carriage frame structure, the advantages are: light weight, great load, more payload can be loaded indirectly increase the loading efficiency。 reduc e fuel consumption, low center of gravity, good stability , lifting more goods at the time the play, easy to discharge。 more modern design, the outer surface of a large flat, easy to paste advertisements, or other patterns. Europe is very special car made extensive use of plastic toolbox fender cover. Plastic material has certain of toughness, resistance to low temperature and impact resistance, easy to rattle, and light weight, attractive appearance, lightweight is process in playing an important role. There are also a part of the manufacturers of high technical level, through changes in the structure reduces weight and do not reduce the cars performance, the main frame is the use of the car structure. For cost and processing considerations, the domestic truck still ordinary steel, steel plate as the main material. 4. Environmental protection As the world39。s industrial level. Developed countries in Europe to Euro V vehicle emissions standards, and requirements of the domestic truck is currently the country Ⅲ standard, domestic and foreign well as very large gap, and reduce vehicle emissions of key technologies are only few the hands of countries, China still has great technical follow up and development process. Further enhance the environmental protection requirements, sealing requirements of the Dump Truck also mentioned the agenda, both at home and abroad using a variety of methods to prevent the Dump Truck39。s way. Dump Truck of the closures are mainly two: one for soft tar paulin cover and a metal hard cover. Therefore, foreign vehicles generally do not overload, the basic goods does not exceed the car along. The Dump Truck is the domestic have both, the majority of urban environmental requirements of the high metal cover, seal better, but the cost is high。 drawback to the main frame on the floor inside is the closed height of the larger plane. Most of lift cylinder form of Dump Truck used in the 6X4 on the bridge in front of each side of the second installation of a multicylinder (generally 3 to 4), the hydraulic cylinder directly on the pivot point on the partment floor. Twin advantages of lifting the main frame for the partment floor and a high degree of closure on the smaller plane。 but more plex hydr