The Shock Absorber Handbook

“…They have observed the similar sinusoidal pressure fluctuations for three measured points including 1-3 while point 4 demonstrated a slightly higher value than zero with relatively stable fluctuations. It has been reported that even tiny pressure fluctuations in hydraulic systems could readily turn the oil bubble into liquid, which cause to produce unwanted noises and give damages to the internal parts of damper [29]. Therefore, pressure fluctuations in hydraulic circuits have to be regularly checked.…”

Section: Introductionmentioning

confidence: 99%

Design of the Hybrid Regenerative Shock Absorber and Energy Harvesting from Linear Movement

Demetgül¹,

Guney²

2017

JOCET

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Abstract-Shock absorbers or dampers are used to maintain the contact between the vehicle's tires and road surface, to absorb the vibrations generated from the road disturbances and recently they are used in energy harvesting. In this study, a hybrid regenerative shock absorber system containing hydraulic and electromagnetic (EM) damper mechanisms was designed to generate electricity. The energy harvesting was applied from the hybrid regenerative shock absorber using excited linear movement. A total of 0.25W for 0.004 m/s, 0.4W for 0.0045 m/s and 0.66W for 0.005 m/s was harvested using 80Ω and 2Ω external resistors for hydraulic part and for EM part, respectively, at 15 mm amplitude in response to the specified excitation. The mean power for 0.005 m/s was calculated as 0.003W for coil and as 0.56W for generator. The harvested energy was measured as low for measured velocities, however, the amount of harvestable energy rate or efficiency has increased with increasing velocity.Index Terms-Electromagnetic damper, energy harvesting, shock absorber, hydraulic damper, regenerative damper.

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“…As one of the most fundamental contributors to a vehicle"s handling, dampers have been studied at great length. This began with the introduction of internal combustion engine driven vehicles in the late nineteenth century [3], when the increased speed available due to these engines made an undamped vehicle inherently unsafe. Since this time, dampers have undergone a number of significant transformations.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Modeling of Vehicles and Damper

Mehmood¹

2014

IOSRJEN

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-The effect that the choice of suspension dampers has on a car"s performance is an often misunderstood area. The increasing competitiveness of car category and the reduced opportunities for testing mean that the team that can optimise their damper setup the quickest is likely to have a large advantage across the entire usage. In the past the selection of dampers was done empirically. The increasing availability of computational power means that numerical simulation is now a viable method of optimising a vehicle before it arrives at the track. This paper outlines the development of the equations of motion for some simple vehicle models. It then demonstrates how these equations can be solved to estimate the road holding performance of a race car. Although results for one particular vehicle have been studied, the focus throughout is to demonstrate numerical and computational techniques that can be used to optimise car"s dampers. A degree of generality has been maintained while analysing these techniques so that they can be applied to a variety of different categories of car models.

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The Shock Absorber Handbook

Cited by 161 publications

References 0 publications

Design of Double Wishbone Suspension System of BAJA Vehicle

Design of Double Wishbone Suspension System of BAJA Vehicle

Design of the Hybrid Regenerative Shock Absorber and Energy Harvesting from Linear Movement

Dynamic Modeling of Vehicles and Damper

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