Working mode design and tests for hydraulically interconnected energy-feeding suspension

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Journal of Vibration and Shock ›› 2020, Vol. 39 ›› Issue (5) : 112-117.

WANG Ruochen, SUN Dong, DING Renkai, MENG Xiangpeng, YU Feng

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Abstract

Aiming at the problem of a hydraulically interconnected suspension being not able to realize vehicle’s global working condition optimal under a single integrated mode, a hydraulically interconnected energy-feeding suspension with three modes of comfort, safety and energy-feeding was designed to feedback vibration energy when improving vehicle ride comfort and handling stability.Road excitation frequencies were taken as the suspension’s mode switching thresholds.A multi-mode control system was designed based on the constant current control method, and the optimal current value under each mode was calculated.Taking a sinusoidal road surface and a random one as examples, the suspension performance under designed three working modes was simulated and analyzed, respectively.The results showed that compared with single integrated mode, vehicle body’s acceleration decreases by 10.77% under suspension’s comfort mode; vehicle tire’s dynamic load under suspension’s safety mode drops by 17.43%; theoretical energy-feeding power under suspension’s energy-feeding mode increases by 19.48%.To verify the effectiveness of simulation, a suspension principle prototype was fabricated for bench scale tests.The test results showed that the proposed suspension’s 3 working modes can balance vehicle’s ride comfort, handling stability and energy-feeding characteristics.

Key words

hydraulically interconnected suspension / energy-feeding / multi-mode design / switching threshold / optimal current value

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WANG Ruochen, SUN Dong, DING Renkai, MENG Xiangpeng, YU Feng. Working mode design and tests for hydraulically interconnected energy-feeding suspension[J]. Journal of Vibration and Shock, 2020, 39(5): 112-117

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