Brake charge valve with set minimum fixed hydro-mechanical pressure by-pass function

摘要

A hydraulic circuit includes: a priority valve including a first position and a second position where: the first position includes a first fluid passage and a fixed bypass orifice connected to the first fluid passage; the second position includes a second fluid passage and a variable bypass orifice connected to the second fluid passage. The hydraulic circuit further includes: a first fluid line fluidly connecting the priority valve and a first machine component; a second fluid line fluidly connecting the priority valve and a second machine component; a check valve placed between the priority valve and the second machine component and fluidly connecting the priority valve and the second machine component; an oil passage on the priority valve fluidly connected to one or more machine components other than the first and second machine components; one or more actuators connected to the priority valve; and a control valve communicatively connected to the one or more actuators connected to the priority valve.

主权项

1. A hydraulic circuit for a machine, comprising:
a priority valve; a first fluid line fluidly connecting the priority valve and a first machine component; a second fluid line fluidly connecting the priority valve and a second machine component; an oil passage fluidly connecting the priority valve and one or more machine components other than the first and second machine components; a check valve placed between the priority valve and the second machine component and fluidly connecting the priority valve and the second machine component; the priority valve including a valve spool configured to shift between a first position and a second position of the priority valve; the first position of the priority valve including a first fluid passage and a fixed bypass orifice connected to the first fluid passage, the first fluid passage fluidly connecting the first fluid line and the second fluid line and configured to establish a fluid connection between the first machine component and the second machine component when the priority valve is in the first position, and the fixed bypass orifice connected to the oil passage and configured to direct fluid to the one or more machine components other than the first and second machine components when the priority valve is in the first position; the second position of the priority valve including a second fluid passage and a variable bypass orifice, the variable bypass orifice having a first end connected to the second fluid passage and a second end, the second fluid passage fluidly connecting the first fluid line and the second fluid line when the priority valve is in the second position, and the second end of the variable bypass orifice connected to the oil passage such that the variable bypass orifice is configured to direct fluid to the one or more machine components other than the first and second machine components when the priority valve is in the second position; wherein the variable bypass orifice is configured to adjustably control the flow of fluid to one or more of increasing, decreasing, and preventing fluid flow to the one or more machine components other than the first and second machine components when the priority valve is in the second position; one or more actuators connected to the priority valve and configured to shift the priority valve between the first position and the second position; and a control valve communicatively connected to the one or more actuators connected to the priority valve.