Active tractor suspension system

Motor vehicles – Bodies – Tractor and similar vehicle cabs

Patent

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Details

280711, 267 6424, 296190, B62D 2404, B62D 3310

Patent

active

057250669

ABSTRACT:
An active vehicle suspension employs a multi-point support system between a vehicle's chassis and cab. Each support point has an isolator which includes a linear hydraulic actuator that is connected at its quiet end to the payload by a passive vibration isolator and is connected at its vibrating end to the chassis. Each isolator also has a support spring to off-load the majority of the weight of the cab from the hydraulic actuator. An accelerometer is mounted to sense movement at a point between the linear hydraulic actuator and the passive vibration isolator. An electrical signal produce by the accelerometer is processed to operate a hydraulic valve that controls movements of the hydraulic actuator so that transmission of vibrations from the chassis to the cab is attenuated.

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patent: 5255935 (1993-10-01), Imani
patent: 5299651 (1994-04-01), Wilson
patent: 5322321 (1994-06-01), Yopp

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