Hydraulic damper and vehicle

A vehicle, comprising a hydraulic damper, wherein the hydraulic damper comprises:

• a cylinder barrel;
• a piston valve, arranged inside the cylinder barrel and slidable relative to the cylinder barrel with damping, and dividing a chamber of the cylinder barrel into a compression chamber and a recovery chamber, wherein the compression chamber and the recovery chamber are filled with oil fluid;
• a piston rod, having a first end threaded through the recovery chamber and coupled with the piston valve, and a second end extending outside the cylinder barrel, wherein a bypass flow channel having a first end and a second end is arranged inside the piston rod, and the first end of the bypass flow channel is in communication with the compression chamber;
• and
• a frequency selection valve, arranged inside the recovery chamber, arranged on the piston rod and spaced a preset distance from the piston valve along an axial direction of the piston rod, wherein the frequency selection valve is in communication with the second end of the bypass flow channel;
• wherein in a case where an excitation frequency borne by the hydraulic damper is higher than a preset frequency, the frequency selection valve is opened to enable the bypass flow channel to be in communication with the recovery chamber;
• and
• in a case where an excitation frequency borne by the hydraulic damper is lower than the preset frequency, the frequency selection valve is closed to block the bypass flow channel from communicating with the recovery chamber.