PNEUMATIC HYDRAULIC SPRING OF VEHICLE SUSPENSION Russian patent published in 2019 - IPC B60G11/26 

FIELD: transportation.

SUBSTANCE: invention relates to automotive suspensions. Pneumohydraulic spring comprises a cylinder with a piston and a rod and a hydraulic accumulator connected to the cylinder cavity through the valve. In the valve body perpendicular to the rod axis and parallel to each other there is a connecting channel, the first and the second stepped holes. Channel is communicated with the piston cavity through the upper hole, and with the hydraulic accumulator through the main and additional throttling channels, the transverse channel, the first and the second stepped holes. In the holes there installed are the spring-loaded stepped plungers of the maximum stroke of compression and rebound, respectively, which form above-plunger cavities interconnected with atmosphere, sub-plunger and annular cavities in them. Annular cavity is communicated with the connecting channel and with the second opening through the transverse channel covered by the higher stage of the compression plunger in the extreme upper position. Sub-plunger cavity is communicated with the hydraulic accumulator cavity through the additional throttling channel shut off by the greater step of the clearing plunger in the extreme lower position. Compression springs are installed in annular cavities. Check valves and throttles are installed in large stages of plungers and communicate annular cavities with sub-plunger ones.

EFFECT: higher damping properties of the spring.

1 cl, 2 dwg