RU2348914C1 - Device for continuous automatic control of vehicle controllable wheels concurrence in motion - Google Patents

Abstract

FIELD: physics, measuring.

SUBSTANCE: invention concerns vehicles and can be applied to automatic control of a concurrence of controllable wheels in the course of a motion. The device contains controllable wheels with bearings, data units of lateral responses of road, electrically joined on a full-wave circuit, an axis of controllable wheels, power supplies radiant, the electromagnetic reel, the switching centre, capacity with a hydraulic medium, the pump, traversal traction with the reversive mechanism. The device is supplied planted on axes of controllable wheels by plugs on which bearings of controllable wheels are erected. As data units of lateral responses of road use outside and interior cone washers mounted on axes of controllable wheels, with the strain-gauge indicators anchored on lateral surfaces of these washers. Between a diagonal of the bridge and the electromagnetic reel which core is related to a switching centre spool, the amplifier of an electrical signal is erected.

EFFECT: increase of sensitivity and accuracy of guidance, and also reliability of the device.

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Description

The proposed device relates to vehicles and can be used to provide automatic regulation of the convergence of the steered wheels in the process of movement.

A device is known for automatically controlling the convergence of steered wheels of a vehicle, comprising lateral force sensors acting on steered wheels, relays whose movable contact is connected to a corresponding gauge of lateral forces, a reversing mechanism for changing the working length of the transverse steering link, and a control system for said mechanism connected with the fixed relay contacts (AS USSR No. 453604, 12/15/1974, Bull. No. 46).

The disadvantage of this device is the unreliability of operation caused by the presence of relays with movable and fixed contacts, which can be triggered by vibrations of the steered wheels.

Closest to the proposed device is a device for automatically controlling the convergence of the steered wheels during the movement, containing sensors of the side reaction of the road acting on the steered wheels, which are piezoelectric sensors in the form of washers mounted on the axles of the steered wheels and electrically connected via a bridge circuit, a reversing mechanism of change the working length of the tie rod and the control system of the specified mechanism, electrically connected with the sensors of the side reaction of the road (Paten RF № 49257, 10.11.2005, Bul. № 31).

The device can work well with a significant deviation of the convergence of the steered wheels, however, its disadvantage is low sensitivity, accuracy and reliability, because sensors of the side reaction of the road also respond to axial forces arising in the cages of the tapered wheel bearings from vertical loads, which can exceed the side reactions of the road, and with a small deviation in the convergence of the steered wheels, which are predominant in the process of movement, and, therefore, a small imbalance in bridge circuit, the magnetic flux of the coil is insufficient to move the core and spool of the switchgear and practically does not eliminate the convergence deviation, which leads to increased about tire wear and fuel consumption.

The technical result of the proposed device for continuous automatic control of the convergence of the steered wheels in motion is to increase the sensitivity with a small imbalance in the bridge circuit, as well as accuracy and reliability.

The specified technical result is achieved in that the device for continuous automatic control of the convergence of the steered wheels in motion, containing steered wheels with bearings, axles, power supply, electromagnetic coil, switchgear, a container with working fluid, a pump, a transverse link with a reversing mechanism, is equipped with fitted on the axles of the steered wheels with bushings on which the bearings of the steered wheels are mounted, as well as the outer and inner conical washers installed steerable wheels on the axles, with strain gauges, fixed on side surfaces of the washers and non-road side reactions sensors connected by an electrical bridge circuit, and between the diagonal of the bridge and the electromagnetic coil, the core of which is bonded to the spool switchgear installed power of the electric signal.

Figure 1 shows a General diagram of the proposed device, figure 2 - the axis of the steered wheel assembly.

The proposed device includes steered wheels 1 mounted through bearings and bushings 2 on the axles 3, on which external and conical washers 4 with load cells 5 are also installed, which are sensors of the side reactions of the road. The load cells 5 are mounted on the side surfaces of these washers, have the same electrical resistance and are connected according to the bridge circuit 6. Points A and B of the electric bridge 6 are connected to a power source 7, and points C and D are connected to an electromagnetic coil 8, the core of which is rigidly connected to the spool 9 of a distribution device 10 of a flow of a working fluid. The device also contains a tank 11, a pump 12, a reversing mechanism for changing the working length of the transverse steering rod (hydraulic cylinder) 13 and an electric signal amplifier 14. Washers 4 with strain gauges, an electric bridge 6, a power supply 7, an electromagnetic coil 8 and a distributor 10 of the working fluid flow and an electric signal amplifier 14 form a control system for the reversing mechanism 13 for changing the working length of the transverse steering rod. The clearance in the bearings (inner race 15, rollers 16, outer race not shown) of the steered wheels is regulated by a nut 17 with a washer 18. The sleeve 2, the inner and outer washers 4 are fixed on the axle 3 of the steered wheels with a nut 19 with a washer 20.

The device operates as follows.

With the rectilinear movement of the car and the correct convergence of the steered wheels, there are no lateral reactions of the road to these wheels, and the resistance of the load cells of the rings are equal to each other, so the voltage supplied from points C and D of the electric bridge 6 to the electromagnetic coil 8 is zero, and the spool 9 of the switchgear 10 is in the central (neutral) position.

If the convergence to the positive or negative side deviates, the steered wheels 1 due to lateral road reactions through the bushings 2 and the washers 4 will act on the load cells and change their electrical resistance. In this case, between points C and D of the bridge 6, a voltage occurs, a current will flow through the electromagnetic coil 8, and a magnetic flux will occur. The core of the coil 8 will move the spool 9 of the switchgear 10 left or right, providing a supply of working fluid from the pump 12 to the corresponding cavity of the hydraulic cylinder 13 (reversible mechanism for changing the working length of the transverse steering rod 21), thereby changing its length and providing the required toe-in 1 .

Thus, the proposed device for continuous automatic regulation of the convergence of the steered wheels in motion allows for the correct toe-in of the steered wheels even with a slight imbalance on the diagonal of the electric bridge, which increases reliability and ensures, with the necessary accuracy, the parallelness of the planes of rotation of the wheels under different driving modes (acceleration, coasting, braking), which helps to reduce resistance to movement, tire wear and fuel consumption.

Claims (1)

A device for continuous automatic regulation of the convergence of the vehicle’s steered wheels in motion, comprising steered wheels with bearings, road side reaction sensors electrically connected via a bridge circuit, steered wheel axes, power supply, electromagnetic coil, switchgear, working fluid reservoir, pump, transverse thrust with a reversing mechanism, characterized in that it is equipped with bushings planted on the axles of the steered wheels on which the bearings are mounted steering wheels, and as the sensors of the side reactions of the road, external and internal conical washers mounted on the axles of the steered wheels are used, with load cells mounted on the side surfaces of these washers, and between the diagonal of the bridge and the electromagnetic coil, the core of which is connected to the spool of the switchgear, an electric signal amplifier is installed.

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