Hydraulic systems and methods for powering auxiliary circuits

• Main Authors: LOMAX, David J, JURICAK, Steven J, ROUSSEAU, Paul A
• Format: Patent
• Language: English
• Published: 20.10.2019
• Subjects: BLASTING; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR; DREDGING; FIXED CONSTRUCTIONS; FLUID-PRESSURE ACTUATORS; FLUID-PRESSURE ACTUATORS, e.g. SERVO-MOTORS; FOUNDATIONS; HEATING; HYDRAULIC ENGINEERING; HYDRAULICS OR PNEUMATICS IN GENERAL; LIGHTING; MECHANICAL ENGINEERING; SOIL SHIFTING; SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; WEAPONS

A hydraulic system for a machine includes a first pump (112), an implement pump (118), a control valve (108), and an auxiliary circuit. The first pump (112) is configured to supply a first fluid flow to a first circuit (102), such as a steering circuit. The implement pump (118) is configured to supply a second fluid flow to an implement circuit to actuate a primary implement function. The auxiliary circuit is configured to deliver fluid flow to actuate an auxiliary implement function (124). The auxiliary circuit is fluidly coupled to the implement circuit. The auxiliary circuit is also coupled to the first circuit by the control valve (108). The control valve (108) is located downstream, in the direction of fluid flow, of the implement pump (118) and the first pump (112). The control valve (108) is configured to allow at least a portion of the first fluid flow to enter the auxiliary circuit and be delivered to the auxiliary implement function (124).