scholarly journals  A Comprehensive Review of the Techniques on Regenerative Shock Absorber Systems

2018 ◽  
Author(s):  
Ran Zhang ◽  
Xu Wang ◽  
Sabu John
Keyword(s):  
Shock Absorber ◽  
Ride Comfort ◽  
Electrical Circuit ◽  
Direct Drive ◽  
Drive Mode ◽  
Shock Absorbers ◽  
Indirect Drive ◽  
Regenerative Shock Absorber ◽  
And Control ◽  
Future Work

In this paper, the current technologies of the regenerative shock absorber systems have been categorized and evaluated. Three drive modes of the regenerative shock absorber systems, namely the direct drive mode, the indirect drive mode and hybrid drive mode are reviewed for their readiness to be implemented. The damping performances of the three different modes are listed and compared. Electrical circuit and control algorithms have also been evaluated to maximize the power output and to deliver the premium ride comfort and handling performance. Different types of parameterized road excitations have been applied to vehicle suspension systems to investigate the performance of the regenerative shock absorbers including that of the nonlinear regenerative shock absorber. The research gaps for comparison of the different drive modes and the nonlinearity analysis of the regenerative shock absorbers are identified and, the corresponding research questions have been proposed for future work.

Performances of Energy-Harvesting Shock Absorbers on Various Types of Vehicles

2015 ◽  
Author(s):  
Sijing Guo ◽  
Lin Xu ◽  
Yilun Liu ◽  
Xuexun Guo ◽  
Lei Zuo
Keyword(s):  
Energy Harvesting ◽  
Vehicle Dynamics ◽  
Degrees Of Freedom ◽  
Large Scale ◽  
Shock Absorber ◽  
Ride Comfort ◽  
Rotational Inertia ◽  
Shock Absorbers ◽  
Regenerative Shock Absorber ◽  
Comprehensive Study

Energy-Harvesting Shock Absorber (EHSA), as a large-scale energy-harvesting mechanism for recovering suspension vibration energy, has been studied for years. A design of the regenerative shock absorber with Mechanical Motion Rectifier (MMR) has been proved to be more reliable and efficient. This paper reports a comprehensive study of the influence of MMR-based Energy-Harvesting Shock Absorber (MMR-EHSA) on vehicle dynamics performances. Models of MMR-EHSA and vehicle with MMR-EHSA with two degrees of freedom are created. Simulations are conducted on five typical vehicles, including passenger car, bus and three types of trucks. The ride characteristics of comfort, road handling and energy recovery are evaluated on these vehicles under various MMR rotational inertia and harvesting damping. The simulation results show that MMR-EHSA is able to improve both the ride comfort and road handling simultaneously under certain conditions over the traditional shock absorbers, which broadens our knowledge of MMR-EHSA’s applicable scenarios.

Damping Characteristics of a Hydraulic Electric Rectifier Shock Absorber and its Effect on Vehicle Dynamics

2015 ◽  
Author(s):  
Lin Xu ◽  
Yilun Liu ◽  
Sijing Guo ◽  
Xuexun Guo ◽  
Lei Zuo
Keyword(s):  
Vehicle Dynamics ◽  
Shock Absorber ◽  
Ride Comfort ◽  
Dynamic Performance ◽  
Nonlinear Damping ◽  
Shock Absorbers ◽  
Damping Characteristics ◽  
Electromagnetic Shock ◽  
Oil Shock ◽  
Regenerative Shock Absorber

Many energy-harvesting shock absorbers have been proposed in recent years, the most popular design is the electromagnetic harvester including linear electromagnetic shock absorbers, rotational electromagnetic shock absorbers, the mechanical motion rectifier (MMR), and the hydraulic-electromagnetic energy-regenerative shock absorber (HESA). With different energy converting mechanisms, the complicated effects of the inertia and nonlinear damping behaviors will greatly influence the vehicle dynamic performance such as the ride comfort and road handling. In this paper, we will theoretically analyze the dynamics of the suspension system with the HESA and give a guide for the HESA design. Then a simulation model of the HESA is built in AMESim to make comparison studies on the different vehicle dynamics caused by the nonlinear damping behaviors of the HESA. The advantages of HESA in terms of ride comfort and road handling will be evaluated in comparison with the similar design without accumulators and the traditional oil shock absorbers.

Finite Element Analysis for a Certain Type of Vehicle Engine Shock Absorber Assembly Performance Based on ANSYS Workbench

2013 ◽  
Vol 365-366 ◽  
pp. 486-489
Author(s):  
Yuan Chen ◽  
Jian Jun Sun ◽  
Ya Qiao Zhu
Keyword(s):  
Shock Absorber ◽  
Ride Comfort ◽  
The Body ◽  
Body Parts ◽  
Element Analysis ◽  
Shock Absorbers ◽  
Vehicle Engine ◽  
Assembly Performance ◽  
And Control

The engine is the power source of the vehicle, it is the main and the most directly reason which causey the vehicle vibration. If you cannot control and attenuation of the vibration generated by it will make other parts of the body associated with strong vibration and noise, and also seriously affect vehicle handling stability and ride comfort, the occupant generated feel discomfort , even when serious damage to the body parts, shorten the car's life. Therefore, the role of the engine mounting system for attenuation and control of vehicle vibration is very important, the shock absorber is an important part of the engine mounting system; engine shock absorbers assembly performance will directly determine them can or cannot work to achieve the desired damping effect. In this paper, the authors propose a new, reliable assembly process; the assembly of the damper can achieve the production process requirements.

Researching on Valve System of Hydraulic Electromagnetic Energy-Regenerative Shock Absorber

2012 ◽  
Vol 157-158 ◽  
pp. 911-914 ◽  
Author(s):  
Zhi Gang Fang ◽  
Xue Xun Guo ◽  
Lin Xu ◽  
Jie Zhang
Keyword(s):  
Shock Absorber ◽  
Electromagnetic Energy ◽  
Hydraulic Motor ◽  
Additional Source ◽  
Valve System ◽  
Shock Absorbers ◽  
Oil Flow ◽  
Core Components ◽  
Flow Through ◽  
Regenerative Shock Absorber

Hydraulic electromagnetic energy-regenerative shock absorber is a new kind of shock absorbers, who can perform the function of a standard shock while acting as an additional source of power. One of the core components of this new shock absorber is the valve system. And its function is to rectify the direction of the oil flow. Then the oil can flow through the hydraulic motor from one port only no matter in expansion stroke or compression stroke. The research focused on the compactness, sensitivity and energy recovery rate of two different valve systems. And the results showed that the valve system composed of check valves better matched the hydraulic electromagnetic energy-regenerative shock absorber.

A Novel Energy-Harvesting Active Radial Bogie for Railway Vehicles: Design, Simulation and HIL Test

2015 ◽  
Vol 733 ◽  
pp. 695-698
Author(s):  
Shu Shu Wang ◽  
Xiao Meng Shen ◽  
Xiao Jian Tu
Keyword(s):  
Energy Harvesting ◽  
Shock Absorber ◽  
Vertical Vibration ◽  
Vibration Energy ◽  
Railway Transportation ◽  
Railway Vehicles ◽  
Rail Vehicles ◽  
Simulation Results ◽  
Regenerative Shock Absorber ◽  
And Control

With the increasing development of railway transportation, the wheel-rail wearing problem is becoming more and more serious while the increasing of both the operating speed and loading weight of railway vehicles. Active radial bogie is one of the hotspots for research in the area of decreasing the wheel-rail wearing issues. Meanwhile, the energy dissipation problem has been restricting its development. This paper puts forward a novel energy-harvesting active radial bogie for rail vehicles. Making use of the hydraulic electromagnetic energy-regenerative shock absorber, the vertical vibration energy could be harvested while train is traveling. Detailed study and evaluation for this active radial bogie will be presented. The tests and simulation results prove the effectiveness of the proposed bogie mechanism and control.

Design and Dynamic Simulation Research of a Bionic Three-Link Tube Shock Absorber

2020 ◽  
Vol 13 ◽  
Author(s):  
Yong Song ◽  
Yue Li ◽  
Zhanlong Li ◽  
Jinyi Lian ◽  
Qinglu Shi ◽  
...  
Keyword(s):  
Dynamic Simulation ◽  
Shock Absorber ◽  
Ride Comfort ◽  
Three Dimensional ◽  
Structure Design ◽  
The Body ◽  
Three Dimensional Modeling ◽  
Shock Absorbers ◽  
Link Mechanism ◽  
Vehicle Suspension System

Background:: Shock absorbers are the main damping component of vehicle suspension system, whose excellent passive characteristics can greatly improve and guarantee the ride comfort and handling stability of vehicles. Therefore, it is of great significance to research and develop a shock absorber with excellent passive characteristics. Objective:: The purpose of this paper is to propose and design a bionic three-link tube shock absorber with good buffering and vibration reduction performance and bionic adaptive characteristics. In addition, the passive characteristics of the purposed shock absorber are studied. Methods:: The bionics idea is applied to the development of vehicle shock absorbers. A three-link mechanism with dampers and springs is abstracted and designed according to the structure and the function of kangaroo legs. A bionic three-link tube shock absorber is constructed based on the traditional tube shock absorber structures and the three-link mechanism. Three-dimensional modeling and three-dimensional dynamic simulation of the shock absorber are carried out by CATIA and ADAMS. Results:: The body acceleration are greatly reduced relative to excitations; the dynamic displacement decreases sharply under greater excitation, but there is slight increase under smaller excitation; the motion function and joint change characteristics of the proposed shock absorber are similar to those of kangaroo legs to a certain degree. Conclusion:: The results show that the structure design of the bionic three-link tube shock absorber is reasonable and workable, the shock absorber presents good buffering and damping performance and some bionic adaptive characteristics, however, there is still room for further optimization of the structure design.

Reducing Vertical and Angular Accelerations With Nonlinear Asymmetrical Shock Absorber in Passenger Vehicles

2013 ◽  
Author(s):  
Marcos Silveira ◽  
Bento R. Pontes ◽  
José M. Balthazar
Keyword(s):  
Shock Absorber ◽  
Ride Comfort ◽  
Nonlinear Characteristics ◽  
Passenger Vehicles ◽  
Car Model ◽  
Shock Absorbers ◽  
Nonlinear Shock ◽  
Angular Oscillations ◽  
Impact Absorption ◽  
Severity Parameter

The behaviour of linear and nonlinear shock absorbers are compared to diminish vertical and angular (pitch) accelerations of passenger vehicles, improving comfort by result. A 4-dof half-car model is used with three configurations of dampers: symmetrical, asymmetrical and front asymmetrical. The analyses use three standard road inputs and include variation of the severity parameter, the asymmetry ratio and the velocity of the vehicle. The comparison shows that the asymmetrical system, with nonlinear characteristics, tends to have a smoother and more progressive behaviour. The results show that the use of the front asymmetrical system diminishes angular oscillations of the vehicle. As lower levels of acceleration are essential for improved ride comfort, the use of asymmetrical systems for vibrations and impact absorption is a superior choice for passenger vehicles.

Performance Simulation of Hydraulic Energy-Regenerative Shock Absorber

2013 ◽  
Vol 798-799 ◽  
pp. 382-385 ◽  
Author(s):  
Lin Xu ◽  
Zu Bo Li ◽  
Xue Xun Guo ◽  
Bian Gong
Keyword(s):  
Energy Recovery ◽  
Shock Absorber ◽  
Damping Force ◽  
Performance Simulation ◽  
Shock Absorbers ◽  
Regenerative Shock Absorber

This paper presents several kinds of energy-regenerative shock absorbers, which all exist some problems. Then, we put forward a novel type of shock absorber: Hydraulic Energy-regenerative Shock Absorber (HESA). In this paper, we focus on damping characteristic and energy recovery of HESA. Its feasible that damping force can be increased by adding a damping orifice in the extension stroke. The damping characteristic of HESA meets the requirements, whats more, it has great potential on energy recovery.

scholarly journals Contribution to the development of methodology for assessing the impact of bus suspension system on fuel consumption and CO2 emission

2020 ◽  
pp. 168-168
Author(s):  
Dragan Sekulic ◽  
Ivan Ivkovic ◽  
Dusan Mladenovic ◽  
Davor Vujanovic
Keyword(s):  
Fuel Consumption ◽  
Co2 Emission ◽  
Degrees Of Freedom ◽  
Shock Absorber ◽  
Ride Comfort ◽  
Suspension System ◽  
Vertical Acceleration ◽  
Shock Absorbers ◽  
Parameter Values ◽  
The Impact

This paper analyzes the effects of intercity bus suspension system oscillatory parameters on driver's ride comfort and road damage. The analysis has been carried out through simulation by means of validated in-plane bus model with six degrees of freedom excited by real road roughness signal. Low root-mean-square values of the weighted vertical acceleration (less than 0.315 m/s2) have been achieved by shock-absorbers with lower damping coefficient and softer suspension system springs. Low values of dynamic load coefficient provide low shock-absorber damping and softer springs. However, low crest factor values for both axles are accomplished for high shock-absorber damping and softer springs in bus suspension system. Results from this analysis could be used as reference for selecting proper oscillatory parameter values when designing road-friendly bus suspension system which in turn would increase vehicle energy efficiency. Presented methods, results and analyzes are the part of wider methodology for assessing the impact of bus suspension system on fuel consumption and CO2 emission.

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