Pneumatic radial tire for passenger vehicle with specified carca

Details Pneumatic radial tire for passenger vehicle with specified carca Pneumatic radial tire for passenger vehicle with specified carca

1990-12-05

1993-01-12

Ball, Michael W.

Resilient tires and wheels

Tires, resilient

Pneumatic tire or inner tube

152538, B60C 300, B60C 304

Patent

active

051787164

ABSTRACT:
A pneumatic radial tire for a passenger vehicle, characterized in that at least a portion of a carcass line extending radially outwardly from the maximum width position in a carcass line of a tire fitted to a normal rim and inflated up to its normal internal pressure is configured so as to substantially conform to an equilibrium carcass line expressed by the following equations (1) and (2) calculated by using an internal pressure allotment ratio g(y) of a carcass layer at the tread portion that is obtained by setting the distributional configuration index .alpha. of the following equation (3) at 4 or more, and that the width of the belt layer extending radially outwardly of the tire is made to range from 105 to 120% of the ground-contacting width of the tread portion when loaded with a designed normal load, wherein: ##EQU1## wherein, provided that a line drawn vertically downwardly from the center of the tread portion to the axle of the tire is y axis of coordinates with the axle of the tire being z axis of coordinates, yA, yD, yC, yB and .eta. denote as follows:

REFERENCES:
patent: 4527606 (1985-07-01), Kita et al.
patent: 4932452 (1990-06-01), Kawabata et al.
patent: 4947915 (1990-08-01), Panikkar et al.
"Bohn, Zur Statik und Dynamik des Gurtelreifens", pp. 255-261 ATZ 69 (1967) 8.

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