Adjustable torsion bar system and anti-roll method

An adjustable torsion bar system, comprising:

• a torsion bar, a left connecting rod and a right connecting rod;
• the torsion bar is fixed on a bogie or a vehicle body;
• both ends of the torsion bar are hinged with one end of the left connecting rod and one end of the right connecting rod respectively;
• and another end of the left connecting rod and another end of the right connecting rod are hinged with both sides of the vehicle body or the bogie respectively, wherein the left connecting rod and the right connecting rod are adjustable hydraulic connecting rods, a length of the connecting rods is capable of being transformed between a state of fixedness, a state of unidirectional follow-up elongation, or a state of unidirectional follow-up shortening so that the adjustable torsion bar system provides a bidirectional anti-rolling torque or a unidirectional anti-rolling torque.