JPH02270603A - Snow tire capable of air pressure adjustment with double tire - Google Patents

Abstract

PURPOSE:To improve the slip preventive effect due to increase in a grip force and also obtain the stabilized traveling by making the title snow tire into a double structure and also adjusting only the pneumatic pressure in an outer tire according to the traveling condition of a vehicle. CONSTITUTION:A snow tire T is formed into a double structure of inner and outer tires A, B. The pneumatic pressure in the inner tire A is held at a constant pressure. In starting or stopping of a vehicle, the pneumatic pressure in the outer tire B is reduced in such a way that the inner surface 2B of the outer tire B is brought into contact with the outer surface 1A of the inner tire A with a load, thus increasing the contact surface of the outer surface 1B of the outer tire B to the road surface C so as to improve the driving and braking performance. Besides, in traveling, the pneumatic pressure in the outer tire B is pressurized again into the usual constant pressure, to thereby stabilize a vehicular load and traveling load.

Description

[Detailed Description of the Invention] Spiked tires are one of the effective tires for use on compacted snow roads and ice-covered roads during the current winter season.
On the other hand, in 1990, public guest visits became a serious social problem.
It was recently decided that production of the product would be prohibited in April 2017, and sales would be prohibited starting in April 2013.

However, concerns about studless tires as an alternative to spiked tires, together with the problem of whether studless tires for large vehicles will be developed in time, have become extremely serious.

Kimoto offers a snow tire that is an effective and suitable alternative to spiked tires.

The details of one embodiment will be explained below with reference to FIG. 1 of the drawings.

1 indicates the normal to best driving condition with both the inner and outer Kimoto tires maintaining normal air pressure.

Since both the inner and outer tires maintain normal air pressure, the vehicle can run stably against the vehicle load and running load.

2 shows the conditions when Kimoto stops, when he starts with a slip, and when he starts and stops while running on the pitch.

The inner tire maintains a normal air pressure, but the air pressure of the outer tire is reduced via the air pressure adjustment mechanism until the outer surface of the inner tire and the inner surface of the outer tire come into contact due to the vehicle load. By reducing the pressure, the contact area of the outer tire is expanded, which increases the tire's grip on the road surface and provides braking and slip prevention effects.Even if the outer tire's air pressure is reduced to the specified level, the inner tire's grip will increase. Since the pressure is maintained, both the vehicle load and the running load can be supported by the inner tires, allowing stable driving.

It goes without saying that when transitioning to normal driving, the air pressure in the outer tires is restored to normal pressure.

[Brief explanation of drawings]

Reference numeral 1 in FIG. 1 is a longitudinal sectional view showing the relationship between the inner and outer tires and the contact state of the outer tires with the road surface during normal driving of the present invention. 2 is a longitudinal cross-sectional view showing the relationship between the outer tires and the contact state between the outer tires and the road surface when the air pressure of the outer tires is reduced to the specified level. A: Inner tire, IA: Outer surface of inner tire,
B...Outer tire, IB...Outer surface of the outer tire, 2
B: Inner surface of the outer tire, C: Road surface.

Claims (1)

[Claims] A snow tire with a dual structure, inner and outer.The inner tire's air pressure is always at normal pressure, and when starting and stopping, the outer tire's air pressure is set so that the inner surface of the outer tire and the outer surface of the inner tire come into contact due to the load. During normal driving, the air pressure in the outer tires is increased, increasing the ground contact area and increasing the braking effect.
Snow tires have a dual structure (inner and outer tires) and have an air pressure adjustment mechanism for the purpose of returning to normal pressure and stabilizing the vehicle load and running load.