HYDRAULIC SYSTEM AND METHOD FOR CONTROL
First Claim
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1. A hydraulic system comprising:
- a source configured to provide pressurized fluid at an actual flow rate;
a first hydraulic circuit configured to receive pressurized fluid from the source;
a second hydraulic circuit configured to receive pressurized fluid from the source; and
a controller configured to;
determine a requested flow for the first circuit;
determine a requested flow for the second circuit; and
apportion pressurized fluid from the source between the first circuit and the second circuit based on a predetermined assumed available flow rate, wherein the predetermined assumed available flow rate is greater than the actual flow rate of the source.
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Abstract
A hydraulic system is disclosed having at least two hydraulic circuits. The disclosed system apportions flow between the two hydraulic circuits based on an assumed flow rate that is held constant in both power-limited and non-power-limited conditions.
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Citations
20 Claims
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1. A hydraulic system comprising:
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a source configured to provide pressurized fluid at an actual flow rate; a first hydraulic circuit configured to receive pressurized fluid from the source; a second hydraulic circuit configured to receive pressurized fluid from the source; and a controller configured to; determine a requested flow for the first circuit; determine a requested flow for the second circuit; and apportion pressurized fluid from the source between the first circuit and the second circuit based on a predetermined assumed available flow rate, wherein the predetermined assumed available flow rate is greater than the actual flow rate of the source. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A machine comprising:
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a frame; an implement; a source configured to provide pressurized fluid at an actual flow rate; a first hydraulic circuit configured to receive pressurized fluid from the source and having a first valve and a first actuator disposed between the frame and the implement, the first valve being disposed between the source and the first actuator; a second hydraulic circuit configured to receive pressurized fluid from the source and having a second valve and a second actuator, the second valve being disposed between the source and the second actuator; and a controller configured to; determine a requested flow for the first circuit; determine a requested flow for the second circuit; and apportion pressurized fluid from the source between the first circuit and the second circuit based on a predetermined assumed available flow rate, wherein the predetermined assumed available flow rate is greater than the actual flow rate of the source. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A method of controlling a hydraulic system having a source of pressurized fluid, a first circuit, and a second circuit comprising the steps:
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determining a requested flow for the first circuit; determining a requested flow for the second circuit; and apportioning pressurized fluid from the source between the first circuit and the second circuit based on a predetermined assumed available flow rate, wherein the predetermined assumed available flow rate is greater than an actual flow rate of the source. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification