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US 9,759,212 B2Granted
Electronic load sense control with electronic variable load sense relief, variable working margin, and electronic torque limiting
AssigneeDanfoss Power Solutions Inc.
InventorsKevin R. Lingenfelter, Alex Bruns, Christian Daley, Vince Ewald, Danny Wakefield
Life of this patent
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Abstract
An electrical pressure control load sense system having a pump connected inline to an operator control spool valve and a compensation circuit. The system also has a plurality of sensors, at least one pressure transducer, a micro-processor, a fixed orifice, a proportional pressure relief valve, and a swashplate angle sensor.
Claims10
An electronic load sense control system, comprising;
- a pump connected in line to an operator control spool valve, a pressure compensation spool valve, and a load sense spool valve;
- a first sensor connected between the pump and the operator control spool valve for measuring pump outlet pressure;
- a second sensor connected between an actuator and the operator control spool valve for measuring pressure at load;
- a load sense port of the pump is routed through a fixed orifice to a proportional pressure relief valve;
- and
- a micro-processor connected to the first sensor, the second sensor and the proportional pressure relief valve.
3 more elements
Dependencies are inferred from the claim text.