【正文】 trol and manipulation of better and more convenient. First, the status of technology development at home and abroad 1. Humanization Further improve vehicle safety, vehicle safety, including performance, braking performance is further enhanced convenience and driver control, fort is the car at home and abroad reflect the requirements of human development, which is reflected in the body, chassis and other aspects . 1. Suspension System Foreign highend Dump Truck, such as SCANIA, VOLVO, 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。 environmental requirements of the majority of the lower soft cover, seal less, but the cost is low. Second, the main structure and function Dump Truck chassis and coat by the two major ponents, two types of chassis they use a stereotypical car chassis. Dump Truck as a shorter wheelbase than the average, the prices require higher strength and stiffness, so characteristic for the Dump Truck, Dump Truck chassis are often designed to be specific. Tipper tops, including cars, subframe, hydraulic lift dump bodies, electrical are systems. Dump Truck lifting mechanism is the core of the Dump Truck judge the merits of the primary indicators. Lifting mechanism of the type currently mon are: Ftype lifting mechanism to enlarge tripod, Tstyle tripod zoom lifting mechanism, lift cylinder, front roof lift and double roll. Dump Truck engine, chassis and cab of the truck are the same structure and general. Points after Dump Truck of the car to rollover and side tipping two, by manipulating the system control rod movement, the more mon after the tipping, tipping push rod to make car, a small number of twoway is tipping. Distribution of highpressure oil through the valve, tubing into the lift cylinder, frontend with the cab car is safety board. The engine through the transmission, PTO driven hydraulic pump unit, hydraulic tipping body partments from the fuel tank, hydraulic pumps, distribution valves, lifting hydraulic cylinders, control valves and tubing and other ponents. Hydraulic tipping body is partments from the fuel tank, hydraulic pumps, distribution valves, lifting hydraulic cylinders, control valves and tubing and other ponents. The engine through the transmission, PTO driven hydraulic pump unit, distribution valves for high pressure