Self-pumping struts for vehicle suspension systems

Details Self-pumping struts for vehicle suspension systems Self-pumping struts for vehicle suspension systems

1982-06-23

1984-09-04

Stoner, Jr., Bruce H.

Spring devices

Vehicle

Comprising compressible fluid

188299, 267 6419, 280707, F16F 946, F16F 500

Patent

active

044693150

ABSTRACT:
A self-pumping strut comprises radially inner and outer cylinders extending between closure members to define a reservoir space between the cylinders which is partitioned by a cylindrical elastomeric membrane into an hydraulic reservoir space and a gas space.
A piston connected by a piston rod to a wheel slides in the inner cylinder to define a pump chamber and a first working chamber within the inner cylinder. Each chamber communicates with the hydraulic reservoir space by means of a respective solenoid-operated valve. A pump outlet valve incorporated into the piston controls flow of hydraulic fluid between the chambers. The first working chamber is in communication with a second working chamber by means of flap valves, the second working chamber being separated from a gas spring chamber by a diaphragm.
An electronic control unit operates the solenoid-operated valves to adjust the height of the strut, which is detected by a sensor.

REFERENCES:
patent: 2802664 (1957-08-01), Jackson
patent: 3194547 (1965-07-01), Avner
patent: 3603576 (1971-09-01), Hahn
patent: 3720425 (1973-03-01), Asano et al.
patent: 4270771 (1981-06-01), Fujii
patent: 4293139 (1981-10-01), Brown
patent: 4361346 (1982-11-01), Harris
patent: 4368878 (1983-01-01), Meller et al.

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