Land vehicles – Body elevation or tilt – Establishing riding or trim height
Patent
1980-12-10
1982-09-21
Song, Robert R.
Land vehicles
Body elevation or tilt
Establishing riding or trim height
280 61, 267 11R, B60G 1700
Patent
active
043503543
ABSTRACT:
A suspension system for motor vehicles of the type designed to maintain automatically the horizontal attitude of a motor vehicle with variations in loads on the front suspensions and on the rear suspensions comprises two hydraulic cylinders interposed between the springs of the rear suspensions and the suspended masses in correspondence with the rear axle of the motor vehicle. Each hydraulic cylinder incorporates a distribution valve comprising a slide valve subject at one of its ends to the pressure within the hydraulic cylinder and its opposite end to the pressure transmitted by a hydraulic pump by means of a control valve which is responsive to the subsidence of the front suspensions. The said distribution slide valve is designed to connect the hydraulic cylinder to exhaust when pressure is transmitted from the said control valve and to connect the internal chambers of the hydraulic cylinder to a pipe directly connected to the outlet of the hydraulic pump when there is pressure inside the hydraulic cylinder. A spring acting as a sensor element of variations in length of the hydraulic cylinder is designed to return the slide valve to one of its conditions of equilibrium, in which the internal chamber of the hydraulic cylinder is isolated, when the motor vehicle becomes situated in a horizontal attitude.
REFERENCES:
patent: 3028175 (1962-04-01), Eckman
patent: 3083026 (1963-03-01), Broadwell
patent: 3550992 (1970-12-01), Grancon
patent: 3556542 (1971-01-01), Capgras
Dotti Giulio
Masoero Renzo
Centro Ricerche Fiat S.p.A.
Song Robert R.
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