Hydraulic system having priority based flow control
First Claim
1. A hydraulic system, comprising:
- a tank configured to hold a supply of fluid;
a source configured to pressurize the fluid;
a plurality of fluid actuators configured to receive the pressurized fluid; and
a controller configured to;
receive an input indicative of which of the plurality of fluid actuators are a first type of fluid actuator and which of the plurality of fluid actuators are a second type of fluid actuator;
receive an input indicative of a desired flow rate for the plurality of fluid actuators;
determine a current flow rate of the source;
demand the desired flow rate for the first type of fluid actuator and demand a scaled down desired flow rate for the second type of fluid actuator when a total desired flow rate for the plurality of fluid actuators exceeds the current flow rate of the source; and
demand a scaled down desired flow rate for all of the plurality of fluid actuators when the desired flow rate for the first type of fluid actuator exceeds the current flow rate of the source.
3 Assignments
0 Petitions
Accused Products
Abstract
A hydraulic system has a source, a plurality of fluid actuators, and a controller. The controller is configured to receive an input indicative of which of the plurality of fluid actuators are a first and a second type of fluid actuator, to receive an input indicative of a desired flow rate for the plurality of fluid actuators, and to determine a current flow rate of the source. The controller is further configured to demand the desired flow rate for the first type of fluid actuator and to demand a scaled down desired flow rate for the second type of fluid actuator when a total desired flow rate exceeds the current flow rate of the source, and to demand a scaled down desired flow rate for all of the plurality of fluid actuators when the desired flow rate for the first type of fluid actuator exceeds the current flow rate of the source.
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Citations
29 Claims
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1. A hydraulic system, comprising:
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a tank configured to hold a supply of fluid; a source configured to pressurize the fluid; a plurality of fluid actuators configured to receive the pressurized fluid; and a controller configured to; receive an input indicative of which of the plurality of fluid actuators are a first type of fluid actuator and which of the plurality of fluid actuators are a second type of fluid actuator; receive an input indicative of a desired flow rate for the plurality of fluid actuators; determine a current flow rate of the source; demand the desired flow rate for the first type of fluid actuator and demand a scaled down desired flow rate for the second type of fluid actuator when a total desired flow rate for the plurality of fluid actuators exceeds the current flow rate of the source; and demand a scaled down desired flow rate for all of the plurality of fluid actuators when the desired flow rate for the first type of fluid actuator exceeds the current flow rate of the source. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of operating a hydraulic system, comprising:
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pressurizing a fluid; selectively directing the pressurized fluid to a plurality of fluid actuators; receiving an input indicative of which of the plurality of fluid actuators are a first type of fluid actuator and which of the plurality of fluid actuators are a second type of fluid actuator; receiving an input indicative of a desired flow rate for the plurality of fluid actuators; determining a current flow rate of a source in fluid communication with the plurality of fluid actuators; demanding the desired flow rate for the first type of fluid actuator and demanding a scaled down desired flow rate for the second type of fluid actuator when a total desired flow rate for the plurality of fluid actuators exceeds the current flow rate of the source; and demanding a scaled down desired flow rate for all of the plurality of fluid actuators when the desired flow rate for the first type of fluid actuator exceeds the current flow rate of the source. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A work machine, comprising:
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a power source; at least one work implement; at least one traction device; and a hydraulic system configured to actuate at least one of the at least one work implement and the at least one traction device, the hydraulic system including; a tank configured to hold a supply of fluid; a source configured to pressurize the fluid; a plurality of fluid actuators configured to receive the pressurized fluid; a controller configured to; receive an input indicative of which of the plurality of fluid actuators are a first type of fluid actuator and which of the plurality of fluid actuators are a second type of fluid actuator; receive an input indicative of a desired flow rate for the plurality of fluid actuators; determine a current flow rate of the source, demand the desired flow rate for the first type of fluid actuator and to demand a scaled down desired flow rate for the second type of fluid actuator when a total desired flow rate for the plurality of fluid actuators exceeds the current flow rate of the source; demand a scaled down desired flow rate for all of the plurality of fluid actuators when the desired flow rate for the first type of fluid actuator exceeds the current flow rate of the source; and adjust operation of the source when the current flow rate is not within a predetermined range of the desired flow rate. - View Dependent Claims (18, 19, 20, 21, 22)
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23. A hydraulic system, comprising:
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a tank configured to hold a supply of fluid; a source configured to pressurize the fluid; a plurality of fluid actuators configured to receive the pressurized fluid; and a controller configured to; receive an input indicative of which of the plurality of fluid actuators are a first type of fluid actuator and which of the plurality of fluid actuators are a second type of fluid actuator; receive an input indicative of a desired priority of the second type of fluid actuator; receive an input indicative of a desired flow rate for the plurality of fluid actuators; determine a current flow rate of the source; and demand the desired flow rate for the first type of fluid actuator and demand a scaled down desired flow rate for the second type of fluid actuator according to the desired priority when a total desired flow rate for the plurality of fluid actuators exceeds the current flow rate of the source. - View Dependent Claims (24, 25)
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26. A method of operating a hydraulic system, comprising:
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pressurizing a fluid; directing the pressurized fluid to a plurality of fluid actuators; receiving an input indicative of which of the plurality of fluid actuators are a first type of fluid actuator and which of the plurality of fluid actuators are a second type of fluid actuator; receiving an input indicative of a desired priority of the second type of fluid actuators; receiving an input indicative of a desired flow rate for the plurality of fluid actuators; determining a current flow rate of a source in fluid communication with the plurality of fluid actuators; and demanding the desired flow rate for the first type of fluid actuator and demanding a scaled down desired flow rate for the second type of fluid actuator according to the desired priority when a total desired flow rate for the plurality of fluid actuators exceeds the current flow rate of the source. - View Dependent Claims (27, 28)
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29. A work machine, comprising:
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a power source; at least one work implement; at least one traction device; and a hydraulic system configured to actuate at least one of the at least one work implement and the at least one traction device, the hydraulic system including; a tank configured to hold a supply of fluid; a source configured to pressurize the fluid; a plurality of fluid actuators configured to receive the pressurized fluid; a controller configured to; receive an input indicative of which of the plurality of fluid actuators are a first type of fluid actuator and which of the plurality of fluid actuators are a second type of fluid actuator; receive an input indicative of a desired priority for each of the second type of fluid actuators; receive an input indicative of a desired flow rate for the plurality of fluid actuators; determine a current flow rate of the source; and demand the desired flow rate for the first type of fluid actuator and demand a scaled down desired flow rate for the second type of fluid actuator according to the desired priority when a total desired flow rate for the plurality of fluid actuators exceeds the current flow rate of the source.
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Specification