Hydraulic suspension system for automotive vehicles

Abstract

Abstract THE CYLINDER (3) OF A DASHPOT ASSEMBLY, HAVING A PISTON (5) SECURED TO A SURROUNDING (2), FORMS WITH THAT SLEEVE A PRESSURE ACCUMULATOR SUBDIVIDED BY A FLEXIBLE MEMBRANE INTO AN AIR COMPARTMENT (16), AND AN OIL COMPARTMENT (17), THE LATTER COMPARTMENT COMMUNICATING THROUGH A FIRST CHECK VALVE WITH A PUMPING CHAMBER (10) WHICH IN TURN COMMUNICATES THROUGH A SECOND CHECK VALVE WITH AN OIL RESERVOIR, THE SECOND CHECK VALVE IS SHUNTED BY A SPRING-LOADED REGULATING VALVE. THE PUMPING CHAMBER HAS END WALLS RESPECTIVELY RIGID WITH THE SLEEVE AND WITH THE DASHPOT CYLINDER WHEREBY RELATIVE MOTIONS OF THIS CYLINDER AND ITS PISTON TEND TO DRAW HYDRAULIC LIQUID FROM THE RESERVOIR TO THE OIL COMPARTMENT TO IN- CREASE THE GAS PRESSURE RESISTING CONTRACTION OF THE DASHPOT ASSEMBLY. IN A NORMAL POSITION OF THE ASSEMBLY, THIS PUMPING ACTION IS SUPPRESSED BY A CAM (28), HOLDING EITHER THE SECOND CHECK VALVE (20, FIG.1) OR THE REGULATING VALVE (24, FIG.2) PERMANENTLY OPEN, THE LATTER VALVE BEING ALSO HELD OPEN IN AN EXTENDED POSITION OF THE DASHPOT ASSEMBLY TO FACILITATE THE RETURN OF EXCESS LIQUID FROM THE OIL COMPARTMENT TO THE RESERVOIR, IN THE LASTMENTIONED POSITION THE FIRST CHECK VALVE (20 OR 30) IS CONCURRENTLY HELD OPEN BY A CAM (28, FIG. 1) OR A SPRING (32, FIG.2) TO COMPLETE THE FLUID PATH.

Inventors

• 👤 Herbert Jean Willich

Bibliographic Details