RU2318678C1 - Vehicle lateral stabilizer hydraulic system - Google Patents

Abstract

FIELD: transport engineering.

SUBSTANCE: invention relates to vehicle lateral stabilizers. Proposed lateral stabilizer hydraulic system contains front and rear stabilizers hinge-mounted by end sections of front and rear axles and made in form of U-shaped torsion bars. System includes two hydraulic posts made in form of cylinder accommodating piston with rod and forming upper and lower hydraulic spaces, upper and lower hydraulic lines connecting corresponding spaces. Stabilizers are connected by middle part with unsprung part of vehicle by means of tie-rod and hydraulic post.

EFFECT: provision of lateral stabilization system of simple design with stable characteristics.

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Description

The invention relates to the field of transport engineering, and in particular to means for stabilizing the lateral stability of vehicles.

A stabilizer is known, consisting of a U-shaped rod, the middle part of which is located in the body supports, and the end sections are in bushings with an external spherical surface, movably located in brackets, rigidly fixed to the steering wheel suspension arms, while the end sections are rigidly fixed bevel gears interacting with gear sectors fixedly mounted on the vehicle body (RF patent No. 2240931, IPC ⁷ B60G 21/00, bull. No. 33, 11/27/2004).

This so-called rigid stabilizer has a number of disadvantages that occur when the vehicle moves on a surface with multidirectional irregularities. Shocks from the left side will be transmitted to the right side and vice versa. When moving along the road surface, when there is a crossing relative displacement of the bridges, the transmission of torque from the anti-roll bar to the car frame reduces its resource, and also reduces the average speed of the car when the wheels detach on opposite sides of the car (diagonal hanging), in which the car can just stop.

There is an active vehicle suspension stabilization system, selected as the closest analogue, containing two linearly acting differential hydraulic cylinders connected between hydraulic suspensions installed between wheel suspensions and anti-roll bars, an electro-hydraulic controller that monitors and corrects the pressure and direction of fluid flow in hydraulic cylinders and receives the necessary information from sensors of rotation angle, speed, lateral acceleration and degree of yaw Nya, a reservoir with a liquid and a hydraulic pump driven by an engine (journal "Automotive Engineering Abroad", No. 10, p.13-15, 2004).

This stabilizer allows you to save the car from longitudinal and lateral vibrations without sacrificing comfort and controllability, but a complex system of control and information processing reduces the reliability of its operation, significantly increases the cost of the design.

Problem to be solved: creation of a stabilizer of lateral stability of a simple design having stable characteristics.

This problem is solved in that the hydraulic system for stabilizing the lateral stability of the vehicle contains pivotally mounted end sections on the front and rear axles made in the form of U-shaped torsion bars front and rear stabilizers, two hydraulic struts made in the form of a cylinder and a piston with a rod located inside it with the formation of upper and lower hydraulic cavities, the upper and lower hydraulic lines connecting the corresponding cavities, while the stabilizers are connected with the middle part Nena using traction and hydraulic rack with the unsprung part of the vehicle.

The stabilizers are connected by the middle part with the help of the rod and the hydraulic strut to the unsprung part of the vehicle, and also, when the cavity of one hydraulic strut is connected to the cavity of another hydraulic strut, either fluid flow or its locking in the case when the direction of movement of the pistons is carried out in one side, allows to achieve high stabilization characteristics of lateral stability with a fairly simple design.

The proposed hydraulic system for stabilizing the lateral stability of the vehicle is illustrated by the following drawings:

Figure 1 - hydraulic stabilization system of lateral stability of the vehicle, General view;

Figure 2 - hydraulic strut of the hydraulic system for stabilizing the lateral stability of the vehicle;

Figure 3 - hydraulic stabilization system of lateral stability of the vehicle when the vehicle is moving on a flat surface;

Figure 4 - hydraulic stabilization system of lateral stability of the vehicle when the vehicle is moving on an uneven surface.

The proposed hydraulic system for stabilizing the lateral stability of the vehicle contains front and rear stabilizers 1 and 2, pivotally mounted by end sections respectively on the front 3 and rear 4 axles, two hydraulic struts 5 and 6. The stabilizers 1 and 2 are made in the form of U-shaped torsions. Hydraulic struts 5 and 6 are made in the form of a cylinder 7 and a piston 8 placed inside it with a rod with the formation of upper and lower hydraulic cavities. The upper and lower hydraulic cavities are interconnected by the upper and lower hydraulic lines, respectively 9 and 10. The stabilizers 1, 2 are connected with the middle part using rods 11 and hydraulic struts 5, 6 with the unsprung part 12 of the vehicle (frame).

The work of the proposed hydraulic system for stabilizing the lateral stability of the vehicle is based on reducing the roll of the car when driving on a winding road, where side accelerations prevail, as well as with a large load on one side of the car.

Due to the fact that the anti-roll bars 1 and 2 installed on the front and rear axles of the vehicle are interconnected via hydraulic racks 5 and 6 and hydraulic lines 9 and 10, when the vehicle is moving, fluid flows from the cavity of one hydraulic rack into the cavity another, or blocking the flow when the pistons press on the fluid in one direction.

When driving in a turn, unidirectional movements of the pistons 8 occur (vehicle roll to the outside of the turn, Fig. 3), but the pistons do not have the ability to move, because there is a compression of the liquid in the upper cavities or in the lower cavities of the hydraulic struts 5, 6, due to which the roll of the car in the corner is reduced.

When moving on irregularities, multidirectional movements A arise (Fig. 4), during which the same movement of the pistons 8 with stabilizers occurs and free flow of fluid through hydraulic lines 9, 10 from the cavity of the hydraulic strut 5 to the cavity of the hydraulic strut 6 and vice versa. Due to this, the dynamic loads on the driver, the frame and the car as a whole are reduced.

The fastening according to the claimed scheme of cylinders 7 of hydraulic racks to the vehicle frame allows to reduce their movement during operation, and this, in turn, allows hydraulic pipelines of larger cross section to be made, increasing work efficiency, and reducing unsprung masses, since the entire hydraulic line is attached to the frame, to increase the reliability of the hydraulic system as a whole due to the fact that the movements of the hydraulic struts and hydraulic lines are small, and all movements are made by pistons with rods and stabilizers that are attached to the bridges of the car.

The hydraulic stabilization system of the vehicle lateral stability can be performed on standard equipment using modern materials and technologies.

Claims (1)

The hydraulic system for stabilizing the lateral stability of the vehicle contains pivotally mounted end sections on the front and rear axles made in the form of a U-shaped torsion bar front and rear stabilizers, two hydraulic struts made in the form of a cylinder and a piston with a rod placed inside it with the formation of upper and lower hydraulic cavities, upper and lower hydraulic lines connecting the corresponding cavities, while the stabilizers are connected by the middle part with the help of traction and hydraulic a rack with an unsprung part of the vehicle.

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