A High-Efficiency Energy Harvesting By Using Hydraulic Electromagnetic 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.

Combustion Parametric Investigations of Methanol-Based RCCI Internal Combustion Engine and Comparison with the Conventional Dual Fuel Mode

“…Kokjohn et al, (2011) showed that ignition timing and combustion rate can be controlled by varying the proportions of each fuel and was able to achieve an indicated thermal efficiency of 53% with negligible NOx and soot. It was also reported that flame propagation did not play a significant role due to presence of very lean mixtures during the start of combustion and that the combustion rate is controlled through chemical kinetics like in HCCI (Zhao, et al, 2020;Iqbal, et al, 2020;Li, et al, 2022;Wu, et al, 2019;Adzuan, & Yusop, 2022;Rangasamy, et al, 2020). Comparatively, Figure 2 shows the various LRF delivery methods; conventional premixed port injection, dual direct injection, and the proposed port injection at the valve for this research.…”