Multiple operating condition damping self-adaption hydro-pneumatic spring and control method thereof

Abstract

The invention provides a multiple operating condition damping self-adaption hydro-pneumatic spring and a control method thereof. The multiple operating condition damping self-adaption hydro-pneumatic spring mainly comprises a cylinder barrel, a pull rod, a pull rod piston, a rod barrel, a cylinder barrel piston and a rod barrel piston. The pull rod is fixed in the cylinder barrel, the upper end of the pull rod is fixed on the top of the cylinder barrel, and the pull rod piston is fixed to the lower end of the pull rod; the pull rod piston is arranged in the rod barrel to form a first piston structure, the cylinder barrel piston is connected to the upper end of the rod barrel, and an upper end opening of the rod barrel is sealed by the lower end face of the cylinder barrel piston; and a second piston structure is formed by the cylinder barrel piston and the cylinder barrel, the rod barrel piston is further arranged on the outer wall of the rod barrel, and a third piston structure is formed by the rod barrel, the rod barrel piston and the cylinder barrel. According to the multiple operating condition damping self-adaption hydro-pneumatic spring and the control method thereof, the demand that the natural frequency of a car body is basically changeless under the condition that a car is in different loading operating conditions is met, and heeling and pitching vibration of the car body owing to the typical limiting conditions of the car such as emergency braking and corner turning at a high speed can be effectively restrained and attenuated on the basis that car riding comfort is met, so that the demand of car riding stability is met.

Description

technical field [0001] The invention relates to a multi-working-condition damping self-adaptive oil-gas spring and a control method thereof. Background technique [0002] When a car is running on an uneven road, it is subjected to the impact from the road surface and generates vibration. In order to alleviate the impact and dampen the vibration, an elastic element and a shock absorber are installed in parallel in the suspension system. Among them, the elastic element is used to absorb the impact energy to filter the vibration of the road surface, but the spring itself will have a reciprocating motion, and the shock absorber is used to suppress the spring jump. [0003] At present, coil springs are generally used as elastic elements in automobile suspension systems, and oil and gas springs are used in high-end vehicles and heavy engineering vehicles. Compared with coil springs, oil-gas springs can improve the comfort and stability of vehicles to a certain extent because of t...

AI Technical Summary

Problems solved by technology

Although the oil-gas spring has the advantage that the stiffness changes with the load, it also has certain defects: the stiffness is low when the load is not loaded, and the stiffness increases with the increase of the load, so that the stiffness may become too large when the load is full, and the Not the optimum stiffness value for the system in its operating condition

However, this structure also has the following disadvantages: 1. After the variable cross-section structure of the transition zone is determined, its damping force stroke correlation will no longer be adjustable; 2. The damping force is not adjustable at the middle point of the soft characteristic zone shown; 3. When the balance position of the shock absorber is not in the middle of the soft characteristic area (the change of the vehicle load will lead to the change of the balance position), the suspension characteristics may not meet the trend of large damping force in the stretching stroke and small damping force in the compression stroke

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