【正文】 the realization of the cumulative total amount of 53,876,595 thousand dollars profit last year, an increase of percent over the same period。s auto parts and accessories manufacturing industry realized a total industrial output value of 865,835,708 thousand dollars more than the same period last year increased by %。 as at the end of November 2007, the entire industry the number of abovescale enterprises for 7171.2008 January to November, Chinaamp。 to achieve a total sales ine 663,529,269 thousand, representing an increase of over the same period last year %。39。 achieve a cumulative total of 32,605,652 thousand dollars profit, than the percent increase over the same period the previous year。s total auto parts and accessories manufacturers to achieve a total industrial output value of 539,704,996 thousand, representing percent increase over the same period the previous year。 D innovation capability difficult to burst, there is no strong support system ponents, and independent brands forced to do difficult masterpiece.2006 January to December, Chinaamp。5. the whole oil type shock absorbers. 【The structure of shock absorber】 The structure of shock absorber piston rod with a tube inserted in the tubeinfull of oil. Orifice Pistons have made have been separated from the piston space of two parts oil to each viscous damping is through the oil produced Orifice, Orifice smaller, the greater the damping force, the greater the viscosity of oil, the greater the damping force. Orifice size if the same work faster when the shock absorber, the damping influence of the General Assembly had to absorb a result, the exit of Orifice to set up a diskshaped valve spring, when the pressure change when the top valve was opened, Orifice opening larger, smaller damping. As the piston is a twoway movement, so both sides are equipped with piston valve spring, respectively, called the pression valve and valve done.Shock absorber according to their structure can be divided into double and single tubetype. Binoculartype shock absorber means there are both inside and outside the two cylinders, pistons, including tubeinmovement, as a result of the entry and out piston rod, the volume of oil inside the cylinder increases with the contraction, it should be exchanged with the outer tube to maintain balance within the cylinder oil. So have a double shock absorber in the fourvalve, that is, in addition to the abovementioned two throttle piston, there are both inside and outside the tube in a plete exchange between the valve and the flow pensation valve.Compared with the doubletype, single tubetype shock absorber simple structure, a reduction of a valve system. In the lower part of cylinder equipped with a floating piston, (the socalled floating piston rod means that there is no control over their movements), the following in the floating piston to form a sealed chamber, there are highpressure nitrogen charge. As a result of the abovementioned piston rod into and out of oil caused by a change in liquid height of floating through the floating piston to automatically addition to the abovementioned two types of shock absorber, there are adjustable shock absorber resistance. It can be changed through an external operation to the size of Orifice. Recently, the car will be electronically controlled shock absorber as a standardtype equipment, traveling through the sensor detection, and by a puter to calculate the best damping force, so that the damping force shock absorber to adjust automatically the work of institutions.The working principle of automobile shock absorbers:Suspension system ponents due to elastic vibration generated by the impact, in order to improve vehicle ride fort, suspension elastic element in parallel with the installation of shock absorber for the attenuation of vibration, automotive suspension systems are used in hydraulic shock absorber damping , and its working principle is that when the frame (or body) and the interaxle relative motion by vibration occur, the shock absorber piston moved up and down inside, shock absorber oil cavity will be repeated from one chamber to go through the various Another pore cavity this point hole wall and the friction between oil and oil of the internal friction between the molecules formed on the vibration damping force, so that vehicle vibration energy into heat oil, and then distributed by the shock absorber to absorb the atmosphere. Channel crosssection and in the oil change and other factors, the damping force with the frame and axle (or wheel) the relative velocity between the increase or decrease, and the viscosity of the oil.Shock absorber ponents and flexibility with ease to assume the task of the impact and vibration, the damping force is too large, flexible suspension will deteriorate, and even damage to shock absorber connector. Hence, the flexibility to adjust shock absorber ponents and this contradiction.(1) in the pression stroke (near the axle and frame each other), a smaller shock absorber damping force in order to give full play to the role of elastic elements of flexibility, ease the impact. At this time, play a major role in elastic elements.(2) trip done in suspension (axle and frame away from each other), shock absorber damping force should be large and rapid damping.(3) When the axle (or wheel) and the relative velocity between the axle is too large, the request can automatically increase the shock absorber fluid flow, so that damping force is always maintained within certain limits in order to avoid to put too much impact load.In the automotive suspension system is widely used in Shock Absorber, and done in the pression and allday trip called the twoway play the role of the role of vibrationtype shock absorber, as well as the use of the new shock absorber, which includes inflatable adjustable shock absorber and shock absorber resistance.The role of twoway Shock Absorber Description w