Tilting system and tilting control method for railway vehicle and railway vehicle

A tilting system for railway vehicle, comprising a controller, a high-pressure air cylinder, a left air spring, a right air spring, a left auxiliary air chamber, a right auxiliary air chamber, a first three-position electromagnetic proportional flow valve, a second three-position electromagnetic proportional flow valve, sensors, a differential pressure valve and a two-position switching valve, wherein

• the left air spring communicates with the left auxiliary air chamber and the right air spring communicates with the right auxiliary air chamber;
• the sensors comprise an acceleration sensor and a height detection sensor provided for a left air spring and a height detection sensor provided for a right air spring, the acceleration sensor is mounted on a side beam of a frame of the railway vehicle and configured to detect an unbalanced centrifugal acceleration of the frame and transmit the unbalanced centrifugal acceleration of the frame to the controller;
• the height detection sensor provided for the left air spring and the height detection sensor provided for the right air spring are mounted at adjacent positions of the left air spring and the right air spring and configured to detect a real-time height value of the left air spring and a real-time height value of the right air spring and transmit the real-time height value of the left air spring and the real-time height value of the right air spring to the controller;
• wherein the controller is configured to control the first three-position electromagnetic proportional flow valve and the second three-position electromagnetic proportional flow valve based on the real-time unbalanced centrifugal acceleration of the frame, the real-time height value of the left air spring and the real-time height value of the right air spring such that high-pressure air in the high-pressure air cylinder is charged into the left air spring through the first three-position electromagnetic proportional flow valve and charged into the right air spring through the second three-position electromagnetic proportional flow valve, or air inside the left air spring is discharged into atmosphere through the first three-position electromagnetic proportional flow valve and air inside the right air spring is discharged into atmosphere through the second three-position electromagnetic proportional flow valve;
• and
• the differential pressure valve is configured to communicate with the left auxiliary air chamber and the right auxiliary air chamber;
• and the two-position switching valve communicates with the left auxiliary air chamber and the right auxiliary air chamber through pipelines, respectively.