Comments on Oil Seals for Gas Pressurized Shock Absorbers of Automotive Suspensions

It has recently become popular to enclose gas in shock absorbers in order to improve thier performance. The operating condition of oil seals for shock absorbers, therefore, has been changing, and some problems with frictional characteristics and sealing performance have newly been observed. This paper discusses how the problems are solved experimentally and reviews the countermeasures to prevent such problems before they actually happen.