Frequency-sensitive shock absorber and method of operating same

A method of operating a frequency-sensitive shock absorber including a piston rod that reciprocates inside a cylinder, a piston valve mounted on the piston rod and configured to divide the cylinder into a compression chamber and a tension chamber, and a valve assembly mounted on the piston rod and configured to generate a damping force that changes according to a frequency during a tension stroke,

• wherein, in the case of a tension stroke at a low frequency region,
• a working fluid flows into the valve assembly along a connection flow path provided inside the piston rod,
• the working fluid flowing into the valve assembly flows to a main chamber provided in a main retainer and a first pilot chamber provided in a housing, and
• a pilot valve disposed between the housing and the main retainer achieves pressure equilibrium so that the working fluid flowing into the valve assembly flows to with only the first pilot chamber.

A method of operating a frequency-sensitive shock absorber including a piston rod that reciprocates inside a cylinder, a piston valve mounted on the piston rod and configured to divide the cylinder into a compression chamber and a tension chamber, and a valve assembly mounted on the piston rod and configured to generate a damping force that changes according to a frequency during a tension stroke,

• wherein, in the case of a tension stroke at a high frequency region,
• a working fluid flows into the valve assembly along a connection flow path provided inside the piston rod,
• the working fluid flowing into the valve assembly flows to a main chamber provided in a main retainer and a first pilot chamber provided in a housing, and
• a pilot valve disposed between the housing and the main retainer is elastically deformed upward so that the working fluid flowing into the main chamber flows out to the compression chamber.