Spring devices – Vehicle – Comprising compressible fluid
Patent
1987-11-03
1989-01-17
Butler, Douglas C.
Spring devices
Vehicle
Comprising compressible fluid
73632, 73658, 188299, 267 6427, 267 6428, 267122, 280707, 280711, 340 52R, 340605, 367 96, 367 99, B60G 1704, B60G 1708
Patent
active
047983698
ABSTRACT:
An ultrasonic air spring system adapted to be mounted on a vehicle for absorbing road shocks exerted on the vehicle and for maintaining the vehicle body level with respect to the axles. An air spring includes an end plate and a piston sealingly connected to the open ends of the flexible elastomeric sleeve to form a pressurized fluid chamber therebetween. A transducer is mounted on the end plate within the fluid chamber and transmits ultrasonic signals through the fluid chamber toward the piston and picks up reflected signals therefrom. A signal is generated by the transducer in response to the reflected signals and fed to a microprocessor based control module. The control module determines whether the air requires fluid feed or exhaustion and will then implement control of inlet or exhaust valves to achieve a desired axial separation between the end plate and piston.
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Geno Wayne H.
Weitzenhof David A.
Brietkrenz Ronald
Butler Douglas C.
The Firestone Tire & Rubber & Company
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