A regenerative hydraulic vibration damper 1 is provided. The vibration damper 1 comprises: a hydraulic fluid retaining volume including a piston 6 and cylinder 4 and optionally one or more further tubes 12,14, the cylinder or further tubes have a plurality of axially spaced strips of piezoelectric material 32 extending circumferentially in or on a wall of the respective tube to generate electricity from shock waves in the hydraulic fluid. An electrical circuit (see Figures 5 & 7 ) rectifies, combines and outputs current from the strips of piezoelectric material 32 to the vehicle battery or other load. As the strips of piezoelectric material 32 are axially spaced, they may generate electricity with different phases, which is combined and smoothed via a low pass filter (42 in Figures 5 & 7) to produce a DC output. A rotatable shaft 28 connected to an electrical generator may be rotated by linear motion of the piston 6 within the cylinder 4 to thereby regenerate energy from shocks.
Regenerative hydraulic vibration damper
2015-05-27
Patent
Electronic Resource
English
IPC: | F16F SPRINGS , Federn / B60G VEHICLE SUSPENSION ARRANGEMENTS , Radaufhängungen und Federungen für Fahrzeuge / F03G Feder-, Gewichts-, Trägheits- oder ähnliche Kraftmaschinen , SPRING, WEIGHT, INERTIA, OR LIKE MOTORS / H01L Halbleiterbauelemente , SEMICONDUCTOR DEVICES / H02N Elektrische Maschinen, soweit nicht anderweitig vorgesehen , ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR |
Active and regenerative control of electrodynamic vibration damper
Tema Archive | 1995
|Vehicle wheel suspension with a hydraulic vibration damper
European Patent Office | 2015
|