SU408835A1 - DEVICE FOR STABILIZATION OF TRANSVERSE STABILITY OF VEHICLES - Google Patents

Description

one

The invention relates to the stabilization of the crossbar stability of vehicles, e.g., trucks, trailers or semi-trailers with a balanced suspension of a two-axle rear carriage, and is intended to increase their stability during lateral roll, running over unevenness or cornering.

Devices are known comprising cylinders mounted between the sprung and unsprung parts of a car. The cavities above the pistons of one side of the cylinders are interconnected and through a hydropneumatic element with interconnected cavities under the pistons of the cylinders of the other side. A change in the load on one wheel of a car is transmitted to all wheels, which prevents the occurrence of lateral roll.

However, when using such devices on vehicles, as a result of an increase in the stiffness of the suspension, even when driving on minor irregularities, their smoothness deteriorates.

The aim of the invention is to provide improved smoothness of the vehicle and effective counteraction to lateral roll.

This goal is achieved by the fact that in each cylinder there is additionally installed a floating

a piston forming an air cavity in the interpiston space communicated with the atmosphere through a channel made in the main piston and its rod.

The drawing shows the connection scheme of the hydraulic cylinders.

The device comprises cylinders 1, 2 on the left side and 3, 4 on the right side of the vehicle, pivotally connected to the sprung and unsprung parts. The cavity 5 above the main piston 6 of the cylinder 1 and the cavity 7 above the main piston 8 of the cylinder 2 are connected by pipeline 9 to each other

and with a cavity 10 under the floating piston I of the cylinder 3 and with a cavity 12 under the floating piston 13 of the cylinder 4. The cavity 14 under the floating piston 15 of the cylinder 1 and the cavity 16 under the floating piston 17 of the cylinder 2 are connected by pipeline 18 to each other and to the cavity 19 above the main piston 20 cylinders 3 and with a cavity 21 above the main piston 22 of the cylinder 4. All cavities above the main and under the floating pistons are filled

working fluid. The air cavity 23 in the interpiston space of each cylinder communicates with the atmosphere through the channel 24, which is made in the main piston and its rod 25.

The device works as follows.

When the vehicle rolls, for example, on the left side, the piston 6 of cylinder 1 and the piston 8 of cylinder 2 of its left side move downwards, as a result of which air from the cavities 23 of cylinders 1 and 2 escapes to atmosphere through channels 24 in the main pistons and rods 25. Upon reaching the critical value of the transverse roll, the main pistons 6, 8 are in contact with the floating pistons 15, 17, respectively, acting on them. In this case, the working fluid is expelled from the cavities 14, 16 through the pipeline 18 in the cavity 19, 21 of the cylinders 3, 4 of the right side.

Increasing the pressure in the cavity 19, 21 causes the pistons 20, 22 of cylinders 3, 4 to move downwards. Moving the elements 20, 22 is larger than the joint movement of pistons 6, 15 and 8, 17, since part of the volume of cavities 19, 21 is occupied by rods 25. The increase in the volume of the cavities 5, 7 of cylinders 1, 2 is compensated by the flow of fluid from the cavities 10, 12 through the pipeline 9.

Thus, by shortening the distance between the sprung and unsprung parts of the left side (cross roll to the left side), the distance between them and the right side of the vehicle decreases, resulting in its alignment. Stabilization, as was shown above, occurs with increasing intensity in the most dangerous zone for lateral stability.

Similarly, the process of stabilization is carried out with a roll on the right side.

When driving, for example, with the left front wheel on the obstacle and simultaneously lowering the left rear wheel by the same amount

the wheel fluid from cavity 7 is forced out into the vacant volume of cavity 5. In this case, the adaptability of the suspension to road roughness is not impaired. When the vehicle is moving along small irregularities, the movement of the main pistons takes place within the limits of the air cavity 23, due to which the stabilizing device does not affect the rigidity of the suspension.

and smoothness is not degraded.

When simultaneously changing the load on each of the four wheels of the vehicle, the main pistons of all cylinders of the device move in one direction, for example

vputr cylinders, while the air from the cavities 23 is released into the atmosphere, and the liquid from the cavities 10, 12, 14, 16 is sucked into the vacant cavities 5, 7, 19 and 21. In this case, in the absence of roll, stabilizing

the effect is also absent.

Subject invention

A device for stabilizing the lateral stability of vehicles, comprising cylinders mounted between the sprung and unsprung parts, the cavities above the pistons of which each side of the vehicle communicate with each other and with the cavities under the pistons of the other side, providing improved smoothness and effective counteraction to the roll, in each cylinder there is additionally installed a floating piston forming an air cavity in the interpiston space, with communicated with the atmosphere through the channel, made in the main piston and its rod.