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US 10,851,816 B1Granted
Apparatus and method for active vehicle suspension
AssigneeClearMotion, Inc.
InventorsClive Tucker, Johannes Schneider, John Giarratana, William G. Near, Colin Patrick O'Shea, Tyson David Sawyer, Richard Anthony Zuckerman, Zackary Martin Anderson, Marco Giovanardi, Jack A. Ekchian
Life of this patent
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Abstract
Method and apparatus for improving the performance, response, and durability of an electro-hydraulic active suspension system. The noise caused by hydraulic flow ripple is reduced and system response is improved.
Claims19
A method of operating a hydraulic motor pump, comprising;
- determining an angular speed of the hydraulic motor pump;
- receiving a command torque request;
- determining that the command torque request is within an unacceptable range of torque for the angular speed;
- and
- in response to the determination that the command torque request is within the unacceptable range of torque for the angular speed, applying an applied torque to the hydraulic motor pump that is within an acceptable range of torque for the angular speed.
2 more elements
A hydraulic system, comprising:
- a hydraulic motor pump;
- an electric motor/generator operatively coupled to the hydraulic motor pump;
- a data storage that includes a map with at least one unacceptable range of torque for an angular speed;
- and
- a controller configured to respond to a request for a torque in the at least one unacceptable range for a given speed by commanding the electric motor/generator to apply a torque to the hydraulic motor pump that is in an acceptable range at the angular speed.
2 more elements
A method of operating a hydraulic motor pump, comprising:
- determining an angular speed of the hydraulic motor pump;
- receiving a first command torque request;
- determining that the first command torque would excite a first level of resonance if applied to the hydraulic motor pump;
- and
- in response to determining that the first command torque would excite the first level of resonance if applied to the hydraulic motor pump:
- determining a second command torque that would excite a second level of resonance if applied to the hydraulic motor pump, wherein the second level of resonance is less than the first level of resonance;
- and
- applying the second command torque to the hydraulic motor pump.
5 more elements
Dependencies are inferred from the claim text.