Research on the Influence of Throttle Valve Stiffness on Damping Characteristics of Shock Absorber

On the basis of the structure characteristics of the seperated manually adjustable damper and its working principles, establish the shock absorber mathematical model, at the same time, get test data and curves of seperated manually adjustable shock absorber damping characteristics by bench test. Use MATLAB to simulate the characteristic curve of the speed of the shock absorber based on the mathematical model. The simulation curves and experimental curves were compared to verify the correctness and accuracy of the model. Further simulation and analysis affect of parts of structural changes on the damping characteristics. In order to provide a theoretical basis to structural parameters designing and vehicle damping matching.

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A High-Efficiency Energy Harvesting By Using Hydraulic Electromagnetic Regenerative Shock Absorber

10.21203/rs.3.rs-34207/v1 ◽

2020 ◽

Author(s):

Muhammad Yousaf Iqbal ◽

Zhifei Wu ◽

Khalid Mahmood

Keyword(s):

Mathematical Model ◽

Energy Harvesting ◽

Shock Absorber ◽

Mechanical Energy ◽

Excitation Frequency ◽

National Standard ◽

Damping Force ◽

Damping Characteristics ◽

Simulation Results ◽

Regenerative Shock Absorber

Abstract This article intends a hybrid energy harvesting shock absorber design which comprehends energy harvesting of automobile suspension vibration dissipation. A mathematical model of the energy harvesting prototype is established, and simulation results show that the dissipation energy can be recovered by varying the feed module, thereby got the damping forces ratio at different compression and extension stroke. The energy conversion from hydraulic energy to mechanical energy mainly then mechanical energy converted into electrical energy furthermore we can rechange our battery from this recovered energy. The advanced mathematical model and prototype proposed maximum ride comfort meanwhile recovered the suspension energy and fuel saving. This article shows the simulation results verifying it with prototype test results. The damping force of expansion stroke is higher than the damping force of compression stroke. The damping characteristics curves and speed characteristics curves verify the validity by simulation and prototyping damper at different amplitudes of off-road vehicles. The Hydraulic Electromagnetic Regenerative Shock Absorber (HESA) prototype characteristic is tested in which 65 watts recovered energy at 1.67 Hz excitation frequency. So, 14.65% maximum energy recovery efficiency got at 20 mm rod diameter and 8 cc/rev motor displacement. The damping characteristics of the HESA prototype examined and it has ideal performance as the standard requirements of the National Standard QC/T 491–1999.

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Analysis of Damping Characteristics of a Hydraulic Shock Absorber

Shock and Vibration ◽

10.1155/2021/8883024 ◽

2021 ◽

Vol 2021 ◽

pp. 1-10

Author(s):

Zhifei Wu ◽

Guangzhao Xu ◽

Hongwei Yang ◽

Mingjie Li

Keyword(s):

Shock Absorber ◽

Check Valve ◽

Line Length ◽

Hydraulic Shock ◽

Hydraulic Motor ◽

Damping Force ◽

Unidirectional Flow ◽

Damping Characteristics ◽

Hydraulic Shock Absorber ◽

Inner Diameter

In the present study, a hydraulic shock absorber is proposed. Since the damper is mainly used in suspension energy recovery system, the damping characteristics of the damper under no-load state are studied in this paper. Structural design is conducted so that the unidirectional flow of the oil drives the hydraulic motor to generate electricity. Meanwhile, an asymmetrical extension/compression damping force is obtained. A mathematical model of the shock absorber is established, and the main characteristics of the inherent damping force are obtained. Based on the established model, effects of the accumulator volume, accumulator preinflation pressure, hydraulic motor displacement, check valve inner diameter, and spring stiffness, hydraulic line length and inner diameter on the indicator characteristics are analyzed. Moreover, a series of experiments are conducted on the designed damper to evaluate the characteristics of the inherent damping force and analyze the effect of the accumulator volume and preinflation pressure on the damping characteristics.

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