Method to adjust wheel friction force for vehicle on tubes-tires

FIELD: transport.

SUBSTANCE: method to adjust friction force for a vehicle on tubes-tires enclosed by rim and protective belts is performed by means of tube-tire and at least one intermediate bandage strain change and their equal or different displacements, by means of change of protective belts tension force, by means of rim rotation acceleration or vehicle centre of gravity acceleration increasing wheel hold-down to surface. During vehicle movement due to tube-tire pressure change to inflated condition or deflated condition of wheel, coefficient of tube-tire or at least one intermediate bandage friction with surface is adjusted.

EFFECT: reduced slippage of wheels on various surfaces.

2 cl, 2 dwg

 

The invention relates to transport machinery, mainly motor vehicles, and more particularly to methods and means for increasing the force of adhesion of the wheels with the road surface.

Known method of controlling the friction forces (cohesion) in the contact patch of the road with a wheel of the vehicle (see patent RU No. 2335419, IPC VT 8/18, VT 1/08), which by means of a hydraulic or pneumatic mechanism to the center of the wheel attach and adjust the acceleration relative to the center of gravity of the vehicle in the direction normal to the wheel contact patch with the road.

The disadvantage of this method is the complexity of the regulation of the friction force with the road wheels using the hydraulic or hydro-pneumatic mechanism. In addition, it's effective for a certain design of the wheels and ineffective for coupling with various road surface.

Known method of controlling the friction forces of the wheels of the vehicle on camera-tire (see patent RU No. 2478483, IPC B60B 39/00, B60B 15/00) governance arrangements in the area of supporting contact of the wheels with the surface and the inseparable girth camera-tire rim and longitudinal tread belts connected by cross tread belts with changeable angle of tension, shifting the camera-bus, with a change in direction and/or� the magnitude of the displacement in the longitudinal direction of the reaction force of the surface of the wheel, to the square of the reference wheel contact with the surface, the pressure change in the chamber-the bus from high to low, due to the additional coating of the camera-bus to the centre of its inner diameter, at least one removable brace.

A disadvantage of the known method, taken as a prototype, is that it does not account for all changes in direction and/or magnitude of the forces and moments of regulation of the friction wheels with a variety of surfaces with the pressure in the wheel.

The technical task of the present invention is the ability to control the frictional force during the movement of the wheels of vehicles on the cameras-the tire around the rim and the tread belt, and a pressure change in the chamber-the bus from inflated to deflated state to increase the speed of the vehicle without slipping of the wheels on different surfaces.

The stated technical problem is achieved in that in the method of controlling the friction force of the wheels of the vehicle on camera-tire management mechanisms in the area of contact of the wheels with the surface and the inseparable girth camera-tire rim and longitudinal tread belts connected by cross tread belts with changeable angle of tension, due to the additional coating of the camera-bus to the centre of her BH�internal diameter, at least one intermediate brace, getting the camera offset-tires and intermediate brace a change of direction and/or magnitude of displacement in the longitudinal direction of the reaction force of the surface with the wheel and the supporting wheel contact with the surface, the pressure change in the chamber-the bus from high to low, in the process of beginning motion, change the speed, the bumps, skidding or braking of the rotation of the wheel rim boost relative to the center of the wheel and the center of its contact against longitudinal reaction force of the surface of the wheel with reference to the area of contact of the wheel with the surface, or get the acceleration of the center of gravity of the vehicle relative to the wheel center and contact center, against the normal reaction force of the surface of the wheel with reference to the area of wheel contact with the surface.

In addition, to increase the speed of the vehicle and avoid slippage of the wheels on different surfaces of the pressure change in the chamber-inflated tire to the deflated state or to the state of the wheels get different value of acceleration of rotation of the rim relative to the wheel center and the center contact against longitudinal reaction force of the surface of the wheel with reference to the area of contact of the wheel with the surface, or get a different value of acceleration TSE�tra of gravity of the vehicle relative to the wheel center and contact center, against the normal reaction force of the surface of the wheel with reference to the area of wheel contact with the surface.

Due to the acceleration of rotation of the rim against longitudinal reaction force of the surface with the wheel or the acceleration of the center of gravity of the vehicle against the normal force of reaction of the surface with the wheel increases downforce and grip of the wheels with the surface and the pressure change in the chamber-tire (inflated to deflated state or to) eliminate wheel spin on a variety of surfaces.

The proposed method of regulation of the friction force of the vehicle on camera-tire is illustrated by drawings.

Fig.1 is a perspective view of the wheel on the tire during rotation torque.

Fig.2 is a perspective view of the wheel on the tire during rotation of its longitudinal strength.

The wheel consists of a camera-bus 1, rim 2, longitudinal tread belts, not shown in the drawing, and a cross-belt 3 shown in the drawing as in the position of the rotation torque, and at a fixed 4 wheel position. The angle of pull 5 transverse belt 3 relative to the wheel contact with the surface and the angle of pull 6 side straps 3 outside of the wheel contact with the surface shown as the wheel rotates. In addition, in Fig.1 shows the acceleration 7 of rotation of the rim 2 torque M.

Fig. shows the 8 acceleration of the center of gravity of the vehicle longitudinal power P x.

In addition, the drawings show the following symbols:

M - torque of the wheel;

Pz- normal wheel load;

Px- longitudinal force;

Vx- portable speed;

With the direction of displacement of the camera-bus and at least one intermediate brace;

R is the normal direction of the reaction force of the surface of the wheel with reference to the area of wheel contact with the surface;

Rxthe longitudinal direction of the reaction force of the surface of the wheel with reference to the area of wheel contact with the surface;

S - area of the bearing contact.

Regulation of the friction force of the vehicle on camera-tire 1 is in the process of beginning motion, change the speed, the bumps, slipping, or braking, by changing the deformation chamber-bus and at least one intermediate brace between the rim and the surface, and by changing the tension of the tread belt, with changing direction and magnitude of the transverse angle of 5 belt 3 relative to the contact wheel, and the angle 6, out of contact of the wheel against or in the longitudinal direction of the reaction force Rx. Thus between the rim 2 and the surface occur in equal or unequal displacement of the camera-bus 1 and at least one intermediate brace, with respect to part of the circumference of the rim and about 2�vectorial belts in the direction of the longitudinal force R x. Before the start of rotation of the wheel torque M receive acceleration 7 of rotation of the rim 2 relative to the center of the wheel and the center of his contact, against the longitudinal forces Rx. And before the start of rotation of the wheel longitudinal force Pxget the 8 acceleration of the center of gravity of the vehicle relative to the wheel center and contact center, against the normal force R.

The proposed method of regulation of the friction force of the vehicle on camera-tire around the rim and the tread belts is due to the change of strain camera-bus and at least one intermediate brace and equal or unequal offsets, by changing the tension of the tread belt, due to the acceleration of rotation of the rim or the acceleration of the center of gravity of the vehicle, increasing the clamping force of the wheel with the surface. During the movement of the vehicle due to the change in pressure in the chamber-inflated tire to the deflated state or to the state of the wheel is governed by the coefficient of friction of tires or at least one intermediate brace with the surface.

All this increases the grip of the vehicle with a variety of soils and surfaces of roads and on off-road and non-cohesive surfaces without disturbing their structure and ecological safety�.

1. A method of controlling the friction force of the wheels of the vehicle on camera-tire management mechanisms in the area of contact of the wheels with the surface and the inseparable girth camera-tire rim and longitudinal tread belts connected by cross tread belts with changeable angle of tension, due to the additional coating of the camera-bus to the centre of its inner diameter, at least one intermediate brace, getting the camera offset-tires and intermediate brace a change of direction and/or magnitude of displacement in the longitudinal direction of the reaction force of the surface with the wheel and the supporting wheel contact with the surface, the pressure change in the chamber-the bus from high to low, due to the additional coating of the camera-bus to the centre of its inner diameter, at least one intermediate brace, characterized in that in the process of beginning motion, change the speed, the bumps, skidding or braking of the rotation of the wheel rim boost relative to the center of the wheel and the center of its contact against longitudinal reaction force of the surface of the wheel with reference to the area of contact of the wheel with the surface, or obtains the acceleration of the center of gravity of the vehicle relative to the wheel center and contact center, against the normal force Rea�tion of the surface of the wheel with reference to the area of wheel contact with the surface.

2. A method of controlling the friction force according to claim 1, characterized in that to increase the speed of the vehicle and avoid slippage of the wheels on different surfaces of the pressure change in the chamber-inflated tire to the deflated state or to the state of the wheels get different value of acceleration of rotation of the rim relative to the wheel center and the center contact against longitudinal reaction force of the surface of the wheel with reference to the area of contact of the wheel with the surface, or get a different value of acceleration of the center of gravity of the vehicle relative to the wheel center and contact center, against the normal reaction force of the surface of the wheel with reference to the area of wheel contact with the surface.



 

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