Abstract: The cushion chamber system’s energy of high-speed cylinder is theoretically analysised, “two hypothesis of linear relationship” and cushioning principle with self-adaptation capacity based on “two hypothesis” is presented. The energy for high-speed cylinder is emulation and experimental studied when base speed of piston is 3 m/s and varies 10%. The result shows that the “two hypothesis of linear relationship” and the cushioning principle with self-adaptation capacity are accurate. The necessary theoretical base of cushioning for high-speed cylinder is established when working condition varies.

Key words: Cushion principle, High-speed cylinder, Pressure feedback, System energy