An electric vehicle electromagnetic integrated energy-feeding suspension actuator and its control method

Abstract

The invention discloses an electric vehicle electromagnetic integrated energy-feeding suspension actuator and a control method thereof. The suspension actuator includes a magnetorheological shock absorber, a linear motor and an actuator monitoring device. The magnetorheological The shock absorber includes cylinder body, magneto-rheological fluid, inner cavity upper partition and inner cavity lower partition, linear motor includes linear motor housing, secondary and primary, actuator monitoring device includes actuator controller; its control The method includes the steps: 1. data collection and transmission; 2. the actuator controller controls the suspension actuator according to its sampling data in four modes: energy sharing mode, primary damping mode, secondary damping mode and active mode. control. The invention has a reasonable design, and can switch the suspension system in multiple modes according to the different road conditions of the vehicle to improve the comfort and stability of the vehicle, and at the same time recover the energy generated by the suspension system in time, reducing the energy waste of the electric vehicle , and can extend the cruising range of electric vehicles, and has high promotion and application value.

Description

technical field [0001] The invention belongs to the technical field of suspension actuators for electric vehicles, and in particular relates to an electromagnetically integrated energy-feeding suspension actuator for electric vehicles and a control method thereof. Background technique [0002] On the one hand, extending the cruising range of electric vehicles is a major research direction of modern electric vehicle technology. At present, increasing the energy density of batteries is an effective means to improve the cruising range of electric vehicles. But it is difficult to get an effective solution. Therefore, if the thermal energy dissipated in various forms during the driving of the car can be recovered and stored in the battery of the electric car, it will be beneficial to extend the cruising range of the electric car. [0003] On the other hand, at present, electric vehicles mostly use passive suspension systems to achieve the purpose of reducing vibration and improv...

AI Technical Summary

Problems solved by technology

The advantage of the semi-active suspension is that it can provide the suspension with a change in the damping force and can also recover energy, but the semi-active suspension can only change one parameter of the suspension damping or stiffness, making the semi-active suspension unable to adapt to all electric vehicles Driving conditions, to a certain extent, limit the further improvement of the stability and smoothness of electric vehicles

The active suspension can adjust the vibration damping performance of the suspension in real time according to the excitation of the unevenness of the road surface and the driving conditions of the electric vehicle, and the active suspension can adapt to all road excitations and the driving conditions of the electric vehicle, but when the active suspension is working , the actuator is always in the active output state, and the mode switching cannot be performed according to the driving conditions of the car, and the active suspension has the disadvantage of high energy consumption, which greatly limits its development prospects

Moreover, traditional automobile suspension components mostly use high-density steel materials, which increase the curb weight of the electric vehicle, improve the rolling damping force of the tires during the running of the electric vehicle, and increase the output torque of the electric vehicle drive motor. And increase the energy output of the battery pack, affecting the cruising range of electric vehicles

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