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US 8,464,526 B2Granted
Hydraulic pump control system
AssigneeIllinois Tool Works Inc.
InventorRoss Renner
Life of this patent
Estimating the term…
Abstract
A hydraulic load ramping system, in certain aspects, may utilize load sensing feedback from an engine, thereby reducing the possibility of overloading the engine as well as smoothing the transition between hydraulic load levels. In particular, by ramping between hydraulic load levels, unwanted movement of hydraulically-driven equipment may be minimized. In addition, by efficiently monitoring the load sensing feedback and ramping between hydraulic load levels, the hydraulic output may be maximized.
Claims20
A service pack, comprising:
- a hydraulic pump configured to drive a hydraulic system;
- an engine configured to drive the hydraulic pump;
- and
- a controller configured to sense an engine load and to ramp output of the hydraulic pump up or down based at least partially on the engine load.
1 more element
A system, comprising:
- a load ramping controller configured to sense engine load associated with an engine based on load sense feedback, wherein the load sense feedback comprises an engine load measured directly from the engine, a hydraulic load associated with a hydraulic pump coupled to the engine, a pneumatic load associated with a compressor coupled to the engine, an electrical load associated with a generator coupled to the engine, or a combination thereof;
- wherein the load ramping controller is configured to ramp output of the hydraulic pump up or down in response to the load sense feedback and a ramping control scheme.
A method of managing output of a hydraulic pump, comprising:
- obtaining load feedback associated with an engine and/or a load driven by the engine, wherein the load comprises a hydraulic pump, a compressor, a generator, or a combination thereof and
- ramping the power output of the hydraulic pump in response to the load feedback.
Dependencies are inferred from the claim text.