Semi-active energy regenerative suspension shock absorber based on mixed excitation and size determining method of shock absorber

Abstract

The invention discloses a semi-active energy regenerative suspension shock absorber based on mixed excitation and a size determining method of the shock absorber. The shock absorber comprises an upper hoisting lug, a dust cover, a lower hoisting lug, a hydraulic shock absorber body and a mixed excitation mechanism. The hydraulic shock absorber body provides the constant viscous damping coefficient. The mixed excitation mechanism provides the adjustable electromagnetic damping force and converts vibration energy into electric energy for storage. Meanwhile, the invention provides the size determining method. The model selection of the hydraulic shock absorber body is determined according to the rating requirements, an electromagnetic damping force expression is derived, the primary size of the mixed excitation mechanism is determined through a particle swarm optimization algorithm, finite element analysis is conducted, the gas length is optimized, and the final size is determined. According to the shock absorber and the size determining method, the hydraulic shock absorber body and a mixed excitation cylindrical linear motor are integrated, the damping force is adjustable, energy is recovered in the working process, the structure is simple, the shock isolation performance and the energy regenerative performance of a vehicle suspension are coordinated, and the Fail-safe function is also achieved; and in addition, the size determining method is clear in step, easy to implement and obvious in optimization result, and has high practicalness.

Description

technical field [0001] The invention belongs to the field of automobile suspension, and in particular relates to a hybrid excitation-based semi-active energy-feeding suspension shock absorber and a method for determining its size. Background technique [0002] At present, the suspension part of most vehicles still uses the traditional double-tube shock absorber, and its damping coefficient cannot be adjusted according to the driving conditions. The design can only guarantee good vibration reduction conditions under certain specific driving conditions. It is difficult to adapt to different road conditions, so the vibration damping performance is limited. In addition, once most traditional shock absorbers fail, they will completely lose their vibration isolation ability, which will greatly affect the ride comfort and handling stability of the car. [0003] On the other hand, global environmental issues and energy issues are becoming more and more prominent. As far as traditio...

AI Technical Summary

Problems solved by technology

Bose has developed a linear motor energy-feed active suspension, which can partially recover vehicle vibration energy while improving vehicle dynamic performance. However, when the linear motor outputs active power, vibration energy cannot be recovered and energy consumption is high.

In addition, Chinese patent CN201310105535.0 discloses a semi-active suspension energy feeder for a hybrid vehicle, which integrates a cylinder-type linear generator into a traditional passive shock absorber, and opens a throttle port on the piston rod so that The damping force of the shock absorber is adjustable, but the adjustment method is complicated and the stability is not high. The linear motor is only used to recover energy, and the utilization rate is not high

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