Ultrasonic Doppler velocity sensing within a hydraulic actuator

Land vehicles – Wheeled – Running gear

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

B60G 1708

Patent

active

049956353

ABSTRACT:
A direct acting hydraulic damper comprising an internal, non-contact sensing means for the direct measurement of relative velocity between the piston and the cylinder of the damper. The damper comprising a cylinder forming a working chamber operable to store damping fluid. A piston is disposed within the cylinder defining an upper and lower portion of the working chamber. The damper further comprises a first transducer for emitting ultrasonic waves within the lower portion of the working chamber. The ultrasonic waves emitted by said first transducer are reflected by a base valve or end surface of the cylinder facing the transducers and are received by a second transducer. A frequency detection circuit determines the difference in frequency between the emitted and reflected ultrasonic waves and generates an output in response thereto. A computer then calculates the relative velocity of the piston with respect to the base valve or end surface, based on the Doppler principle. The velocity signal is then used for automatic control of suspension parameters according to predefined algorithm.

REFERENCES:
patent: 496195 (1990-03-01), Kerastas
patent: 4090407 (1978-05-01), Shuler 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.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Ultrasonic Doppler velocity sensing within a hydraulic actuator does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Ultrasonic Doppler velocity sensing within a hydraulic actuator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ultrasonic Doppler velocity sensing within a hydraulic actuator will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-289751

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.