Parameters Analysis of Hydraulic-Electrical Energy Regenerative Absorber on Suspension Performance

Abstract

To recycle the vibration energy of vehicles over rough roads, a hydraulic-electricity energy regenerative suspension (HEERS) was designed in the present work, and simulations were performed with focus on its performance. On the basis of the system principle, the mathematical model of hydraulic-electrical energy regenerative absorber (HEERA) and two degrees of freedom (DOF) suspension dynamic model were constructed. Using the model of HEERA, simulations on force-displacement and forcevelocity characteristics were performed with a 1.67 Hz frequency and a sinusoidal input adopted. And then in combination with HEERA model and two DOF suspension models, simulations on the performance of HEERS also were carried out. Finally, the influences of charging pressure and volume of the accumulator, hydraulic motor displacement, orifice area of check valve, and inner diameter of hydraulic pipelines on the performance of HEERA and HEERS were investigated in depth. The simulation results indicated that (i) the damping characteristic of HEERA was coincident with the damping characteristics of traditional absorber; (ii) the most remarkable influencing factor on the performance of HEERS was the hydraulic motor displacement, followed by orifice area of check valve, inner diameter of pipelines, and charging pressure of accumulator, while the effects of charging volume of accumulator were quite limited.

Energy Regeneration From Suspension Dynamic Modes and Self-Powered Actuation

“…A hydraulic pumping regenerative suspension can harvest energy from vibration while providing variable damping by controlling the electrical load of the energy recovery system [25]. Hydraulic-Electrical Energy Regenerative Suspension (HEERS) systems can provide similar characteristics as traditional shock absorbers where the parameters influencing on the performance of HEERS are found to be the hydraulic motor displacement, orifice area of check valve, inner diameter of pipelines, and charging pressure of accumulator [26]. Gain-scheduling control of electromagnetic regenerative shock absorbers can provide a solution where the parameters can be calibrated and directly related to the energy harvesting specifications [27].…”

Research Review of a Vehicle Energy-Regenerative Suspension System

“…The designed energy regenerative suspension can keep the rotation of the motor in one direction all the time, which not only improves the energy recovery characteristics but also has a high reliability [35]. Zhang [36] designed a hydraulic energy recovery shock absorber and analyzed its suspension performance. Wang [37] determined that under the sinusoidal excitation of 1 Hz and 25 mm, the recoverable power is 26 W, and the efficiency is 40%.…”

Dynamic characteristics of coupling model of valve-controlled cylinder parallel accumulator

“…where C e denotes the external leakage coefficient, m 5 /(N • s); and V 2 denotes the total volume of the rod chamber (containing the connecting pipe and the inside of the cylinder), m 3 . By combining equations (6) and (13), equation 14can be obtained.…”

“…Additionally, Yang and coworkers [5] show that the accumulator can suppress the water hammer phenomena of hydraulic steering systems and prove that the suppression effect on the water hammer is optimized when the inherent frequency of the water accumulator is equal to or close to the frequency of the water hammer. In references [6][7][8][9][10][11][12], hydraulic potential energy regenerative vehicles are designed to reduce the vibration amplitude of vehicles on rough roads and decrease the structural noise. The motor location, the hole area of the valve, the inner diameter of pipelines, and the accumulator pressure are key factors contributing to suspension performance.…”