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减振器是车辆悬架的主要阻尼元件。减振器的外特性由示功图p=f(s)和速度特性p=f(υ)表示。正常示功图应当完整、圆滑、丰满、无畸变;复原阻尼力大于压缩阻尼力;最大阻尼力要符合设计目标,才能满足车辆行驶安全性和平顺性的要求。双筒液压减振器存在临界速度低和易产生气泡的缺点,导致发生外特性畸变。双筒充气液压减振器由于在贮油腔内有预充气,在工作过程中有一定的背压,从而能有效地消除外特性畸变。对所研制的双筒充气液压减振器的测试结果表明,具有良好的性能,其制造要求有准确的充气和严格的密封工艺。
Shock absorbers are the main damping elements of a vehicle suspension. The external characteristics of the shock absorber by the dynamometer p = f (s) and velocity characteristics p = f (υ) said. The normal dynamometer should be complete, smooth, plump, and undistorted; the recovery damping force is greater than the compression damping force; and the maximum damping force should meet the design objectives in order to meet the requirements of vehicle running safety and ride comfort. Binocular hydraulic shock absorber has the disadvantage of low critical speed and easy to produce bubbles, resulting in the occurrence of external distortion. Due to the pre-charge in the oil storage chamber, the double-cylinder inflatable hydraulic shock absorber has certain back pressure during the working process so as to effectively eliminate the external characteristic distortion. The test results of the developed double cylinder inflatable hydraulic shock absorber show that it has good performance and its manufacture requires accurate inflation and strict sealing process.