VEHICLE SUSPENSION PNEUMOHYDRAULIC SPRING Russian patent published in 2007 - IPC B60G11/26 F16F5/00 

FIELD: transport engineering.

SUBSTANCE: invention relates to pneumohydraulic springs with self-adjusted hydraulic resistance depending on amplitude and direction of oscillations. Proposed pneumohydraulic spring of vehicle suspension has cylinder with piston and rod forming piston and ring spaces in cylinder, and hydraulic accumulator connected with cylinder space through valve self-adjusted in amplitude and direction of oscillations. Valve is made in form of ring piston installed in cylinder for axial displacement along valve rod. One end of valve rod is connected with support secured on end face of cylinder. Ring piston travel limiter is installed on other end of rod, forming with cylinder a ring space of valve communicating with hydraulic accumulator through holes made in support and forming additional throttling channel and communicating with piston space through main throttling channel made in ring piston and through check valve installed at one of side of ring piston. Blind axial hole is made in piston with rod into which limiter gets at end of spring compression stroke, thus forming inner space of maximum vibration damper communicating with piston space. Invention reduces dynamic loads and increases free travel of spring rod at reduced damping without increasing overall dimensions, provides asymmetrical damping characteristics at compressing and rebound strokes and increased rigidity at end of compression stroke which simplified design, improves reliability and reduces heating of spring, provides smooth running on any road with small irregularities whose probable height does not exceed travel of spring rod corrected to wheel with reduced damping.

EFFECT: reduced dynamic loads, simplified design, improved reliability of vehicle running of roads of any type.

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