US 11,719,262 B2
Hydraulic actuator control system
Joshua Zimmerman, Willow Springs, IL (US); and Navneet Gulati, Naperville, IL (US)
Assigned to CNH Industrial America LLC, New Holland, PA (US)
Filed by CNH Industrial America LLC, New Holland, PA (US)
Filed on Dec. 20, 2021, as Appl. No. 17/555,579.
Application 17/555,579 is a continuation of application No. 16/737,324, filed on Jan. 8, 2020, granted, now 11,204,044.
Prior Publication US 2022/0112907 A1, Apr. 14, 2022
Int. Cl. F15B 11/042 (2006.01)
CPC F15B 11/0426 (2013.01) [F15B 2211/40592 (2013.01); F15B 2211/455 (2013.01); F15B 2211/6346 (2013.01); F15B 2211/665 (2013.01); F15B 2211/6654 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A hydraulic actuator control system, comprising:
a controller comprising a processor and a memory, wherein the controller is configured to control a first control valve and a second control valve based on a selected mode of operation of a plurality of modes of operation;
wherein the first control valve is configured to provide a first hydraulic fluid flow to an actuator, a maximum first hydraulic fluid flow through the first control valve is less than a maximum actuator hydraulic fluid flow of the actuator, the second control valve is configured to provide a second hydraulic fluid flow to the actuator, a maximum second hydraulic fluid flow through the second control valve is less than the maximum actuator hydraulic fluid flow of the actuator, and the maximum first hydraulic fluid flow through the first control valve is greater than the maximum second hydraulic fluid flow through the second control valve; and
wherein the plurality of modes of operation comprises:
a first mode of operation, wherein the controller, while operating in the first mode of operation, is configured to open the first control valve, and before maximizing the first hydraulic fluid flow through the first control valve, the controller is configured to open the second control valve to provide the actuator with the second hydraulic fluid flow; and
a second mode of operation, wherein the controller, while operating in the second mode of operation, is configured to open the second control valve, and before maximizing the second hydraulic fluid flow through the second control valve, the controller is configured to open the first control valve to provide the actuator with the first hydraulic fluid flow.