Shock absorber with sonar position sensor

Details Shock absorber with sonar position sensor Shock absorber with sonar position sensor

1990-09-25

1992-04-14

Marmor, Charles A.

Land vehicles

Wheeled

Running gear

B60G 1126

Patent

active

051041448

ABSTRACT:
A damping device operable to change a suspension characteristic of a vehicle in response to changes in a relative relationship between the piston and the cylinder of the damping device. The damping device comprising a pressure cylinder forming a working chamber operable to store damping fluid. A piston is disposed within the pressure cylinder defining an upper and lower portion of the working chamber. The damping device further comprises a transducer for emitting and receiving sound waves within the lower portion of the working chamber. The sound waves emitted by said transducer are reflected by the end surface of the cylinder or a base valve mounted at the end of the cylinder and are received by said transducer. A timing circuit determines the difference in time between the emitted and reflected sound waves and generates an output in response thereto. A central processor calculates the desired relative relationship, such as the relative distance between the piston and the base valve, from the output of the timing circuit.

REFERENCES:
patent: 4090407 (1978-05-01), Schuler et al.
patent: 4550286 (1985-10-01), Holland et al.
patent: 4595072 (1986-06-01), Barnea
patent: 4650042 (1987-03-01), Knecht et al.
patent: 4674768 (1987-06-01), Morra
patent: 4722547 (1988-02-01), Kishi et al.
patent: 4883150 (1989-11-01), Arai
patent: 4995635 (1991-02-01), Guy
patent: 5000478 (1991-03-01), Kerastas

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