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Hydraulic Integrated Interconnected Regenerative Suspension: Modeling and Characteristics Analysis.

Sijing Guo^1,2, Liang Chen^1,2, Xikai Wang^1,2

¹School of Automotive Engineering, Wuhan University of Technology, Wuhan 430070, China.

|July 2, 2021

Summary

A new hydraulic suspension system (HIIRS) improves vehicle stability and harvests energy. This regenerative suspension significantly reduces vibrations and enhances off-road vehicle dynamics while simultaneously generating power.

Keywords:

energy harvesting hydraulic energy-harvesting shock absorber hydraulic interconnected suspension vehicle dynamics vibration characteristics

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Area of Science:

Mechanical Engineering
Automotive Engineering
Vibration Analysis

Background:

Traditional vehicle suspensions face limitations in vibration damping and energy recovery.
Developing advanced suspension systems is crucial for improving vehicle performance and efficiency.

Purpose of the Study:

To investigate the vibration characteristics and energy harvesting capabilities of a novel hydraulic integrated interconnected regenerative suspension (HIIRS).
To evaluate the effectiveness of the HIIRS system in enhancing vehicle dynamics compared to traditional suspensions.

Main Methods:

Modeling the HIIRS using coupled, frequency-dependent equations based on the hydraulic impedance method.
Simulating vibration and energy harvesting performance by integrating the HIIRS model into a half-car model.
Comparing the HIIRS performance with a traditional suspension system for off-road vehicles.

Main Results:

The HIIRS-equipped vehicle exhibits natural frequencies and damping ratios suitable for off-road applications.
Significant reductions in bounce (64.62%) and roll (11.21%) acceleration were observed compared to traditional suspensions.
Average energy harvesting power reached up to 655.90 W at 108 km/h on a Class-C road.

Conclusions:

The HIIRS system effectively enhances vehicle dynamics by reducing vibrations.
The HIIRS demonstrates significant potential for simultaneous vibration energy harvesting in off-road vehicles.
This novel suspension technology offers a dual benefit of improved ride comfort and energy generation.