Abstract
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.
Highlights
Conventional dampers, commonly called shock absorbers, are mainly applied to reduce the vehicle body fluctuation
E hydraulic shock absorber uses the oil system to convert the vibration energy of the piston into the hydraulic energy of the damping oil, which drives the hydraulic motor in the system to rotate and drive the generator to generate the electricity [3, 4]
Its design principle and mathematical model are described in detail. e principle prototype is constructed to verify the damping characteristics of the proposed shock absorber. e main conclusions are as follows: (1) e hydraulic shock absorber can obtain an asymmetrical extension/compression damping force. e damping force depends on the excitation speed
Summary
Conventional dampers, commonly called shock absorbers, are mainly applied to reduce the vehicle body fluctuation During this operation, the kinetic energy originating from the body fluctuation is converted into the heat, so that the oil temperature increases. Abdelkareem et al conducted a comprehensive simulation on different types of vehicles (passenger, bus, trucks, and off-road vehicles) to estimate the amount of wasted energy in the vehicle suspension system. They quantified the potential collection power of different standard driving cycles (NEDC, WLTP, HWFET, and FTP) [11, 12]. Peng proposed a new type of hydraulic electromagnetic energy regenerative shock absorber and
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