Current Status and Tendency of Development in Vehicle In-Arm Suspension

In-arm hydro-pneumatic suspension unit (ISU) is a kind of hydro-pneumatic suspension, it has been researched for 30 years. Nowadays, there are three companies in mass production of ISU. In this paper, the growth and ISU products of these companies are introduced, the main characteristics of ISU are discussed, and the main application of the hydro-pneumatic suspensions are presented.