RU2405706C1 - Device for continuous automatic toe-in control - Google Patents

Abstract

FIELD: transport.

SUBSTANCE: invention relates to automotive industry and can be used for automatic toe-in control in motion. Proposed device comprises controlled wheels with bearings, axles with rotary cams, sleeves, and sleeve and ring fastening nuts, strain gage, power supplies, electromagnetic coil, distributor, working fluid vessel, pump and transverse tie rod with reversing mechanism. Strain gages secured on wheel face surface represents transducers of rods lateral reaction and are connected in bridge circuit with power supply and electromagnetic coil. Electromagnetic oil core is coupled with working fluid control valve spool communicated with working fluid vessel and hydraulic cylinder of reversing mechanism intended for adjusting transverse steering link length. Rings on face surfaces has two parallel through cutouts limited by ring collars.

EFFECT: higher sensitivity and accuracy of automatic toe-in adjustment in motion.

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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 of the car during movement.

A device for automatically controlling the convergence of steered wheels in the process of driving, comprising road side reaction sensors acting on steered wheels, which are piezosensors in the form of washers mounted on the axles of steered wheels and electrically connected via a bridge circuit, a reversible mechanism for changing the working length of the transverse steering rod and a control system for the specified mechanism, electrically connected with the sensors of the side reaction of the road (RF Patent No. 49257, November 10, 2005, Bull. No. 31).

The disadvantage of this device is the low sensitivity, accuracy and reliability, because The lateral reaction sensors of the road also respond to axial forces arising in the cages of the tapered wheel bearings from vertical loads.

Closest to the proposed device is a device for continuous automatic regulation of the convergence of the steered wheels in motion, containing sensors of lateral reactions of the road, which are strain gauges electrically connected according to the bridge circuit, mounted on the end surfaces of the rings, mounted on the axes of the rotary trunnions, on which bearings are mounted on the bushings steering wheels, and an electric signal amplifier, a reversing mechanism for changing the working length of the transverse steering rod and the system board the specified mechanism, electrically connected to the sensors of the side reaction of the road (RF Patent No. 2348913, 03/10/2009, Bull. No. 7).

The disadvantages of this device are the lack of sensitivity and accuracy without amplification of the electric signal from the sensors of the side reactions of the road, and with the amplifier - the complexity of the design, reduced reliability and the cost of electric energy for the operation of the amplifier.

The technical result of the proposed device for continuous automatic regulation of the toe of the steered wheels of the car during movement is to increase the sensitivity and accuracy, simplify the design, reduce the cost and operating costs, increase reliability.

The specified technical result is achieved by the fact that in the device for continuous automatic regulation of the convergence of the steered wheels of the car during movement, containing steered wheels with bearings, axles with knuckles, bushings, rings and washers with nuts on their axles, strain gauges connected to an electric bridge , which are sensors of side reactions of the road, power supply, electromagnetic coil, switchgear, reservoir with working fluid, pump, transverse thrust with reverse By means of the mechanism, the rings on the end surfaces have two parallel end-to-end, bounded by grooves of the rings of the slot, which increases the design sensitivity, accuracy and eliminates the electric signal amplifier.

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 mounted on bushings 2, rings 3 with two parallel through, bounded rings of rings with slots 4 on the axles 5. Strain gauges (electric sensors of side reactions of the road) 6 are mounted on the end surfaces of the rings 3, have the same electrical resistances and are connected according to the bridge circuit 7. Points A and B of the electric bridge 7 are connected to the power supply 8, and points C and D to the electromagnetic coil 9, the core of which is rigidly connected en with a spool 10 of the switchgear 11 of the fluid flow. The device also contains a tank 12, a pump 13 and a reverse mechanism for changing the working length of the transverse steering rod (hydraulic cylinder) 14. Strain gauges 6, an electric bridge 7, a power supply 8, an electromagnetic coil 9 and a switchgear 11 form a control system for a reversing mechanism 14 for changing the working length of the transverse tie rod 15.

The clearance in the bearings (inner race 16, rollers 17, outer race not shown) of the steered wheels is regulated by a nut 18 with a washer 19. The sleeve 2 is fixed to the axle 5 of the steered wheels by a nut 20 with a washer 21.

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 load cell resistances are equal to each other, so the voltage supplied from points C and D of the electric bridge 7 to the electromagnetic coil 9 is zero and the spool 10 of the switchgear 11 is in the central (neutral) position.

When the convergence to the positive or negative side is deviated, the steered wheels 1 due to side reactions of the road through the bushings 2 and rings 3 will act on the load cells 6 and change their electrical resistance. In this case, a voltage is applied between points C and D of the bridge 7 to the electromagnetic coil 9. The current in the coil 9 will cause a magnetic flux moving the core of the coil 9 and the spool 10 of the switchgear 11 left or right, providing a supply of working fluid from the pump 13 to either another cavity of the hydraulic cylinder (reversing mechanism) 14 changing the working length of the transverse steering rod 15, thereby changing its length and providing the required toe-in of the wheels 1.

Thus, the proposed device for continuous automatic control of the convergence of the steered wheels of the car during movement increases the sensitivity and accuracy, simplifies the design, increases reliability, reduces the cost and operating costs of the device, ensures the correct position of the steered wheels under various driving conditions (acceleration, reel, 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 steered wheels of the car during movement, containing steered wheels mounted through bearings, mounted on bushes, rings and washers with nuts for fixing bushes and rings on axles with rotary knuckles, strain gauges, which are sensors of the side reaction of the road, mounted on end surfaces of the rings and connected via a bridge circuit to a power source and to an electromagnetic coil, the core of which is connected to the distribution valve a device for the flow of a working fluid in communication with a reservoir for a working fluid, a pump and a hydraulic cylinder of a reversing mechanism for changing the working length of the steering tie rod, characterized in that the rings on the end surfaces have two parallel through-cuts limited by the beads of the rings.

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