Measuring and testing – Tire – tread or roadway – Tire inflation testing installation
Patent
1996-11-20
1998-10-06
Oen, William L.
Measuring and testing
Tire, tread or roadway
Tire inflation testing installation
G01M 1702
Patent
active
058179356
ABSTRACT:
An apparatus for testing a test wheel, provided with a tire and a rim, by passing the wheel over an obstacle. The apparatus including a road-wheel, a steering knuckle capable of rotatably supporting a hub and the test wheel, and two suspension arms supporting the steering knuckle. The apparatus also comprises a first, second, third and fourth leaf spring connected to the suspension arms and to a supporting frame, a fifth leaf spring connected to the steering knuckle and to the supporting frame, and a pneumatic spring in engagement with the steering knuckle and with the supporting frame. First and second acceleration transducers associated with the hub provide measurements of natural frequencies and dampenings of the tire in a radial and in a longitudinal direction. The apparatus can be used both in a movable-hub mode and in a fixed-hub mode.
REFERENCES:
patent: 3599486 (1971-08-01), Pernau et al.
patent: 5003819 (1991-04-01), Koopmann
P.W.A. Zegelaar et a, "Tyre Models for the Study of In-Plane Dynamics" The Dynamics of Vehicle on Roads and on Tracks, Supplement to Vehicle System Dynamics, vol. 23, pp. 578-590 (1994), (no month).
Di Bernardo Carlo
Mancosu Federico
Matrascia Giuseppe
Oen William L.
Pirelli Coordinamento Pneuatici S.P.A.
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