Control system for work vehicle
View Patent ↗A work machine includes a fluid circuit for use with an attachment configured to operate using one of a uni-directional flow and a bi-directional flow through the attachment. An operator-enabled mode selection switch operably connects to a controller. An electrical circuit includes the operator-enabled mode selection switch and a second operator-enabled switch. A first control valve is in fluid communication with the attachment. In response to the mode selection switch being operator-actuated to a bi-directional mode setting, the first control valve via the controller is actuatable to one of the bi-directional positions, electrical power being unavailable to the second operator-enabled switch of the electrical circuit. In response to the mode selection switch being operator-actuated to a uni-directional mode setting, the first control valve via the controller secures the first control valve in the uni-directional position, and electrical power is provided to the second operator-enabled switch of the electrical circuit.
1. A work machine comprising:
a fluid circuit for use with an attachment configured to operate using one of a uni-directional flow and a bi-directional flow through the attachment;
the fluid circuit including an operator-enabled mode selection switch operably connected to a controller;
an electrical circuit comprising the operator-enabled mode selection switch and a second operator-enabled switch; and
a first control valve in fluid communication with the attachment, the first control valve comprising a first bi-directional position, a uni-directional position and a second bi-directional position;
in response to the mode selection switch being actuated to a bi-directional mode setting by the operator, the first control valve via the controller, is actuatable by the operator to one of the bi-directional positions, and electrical power is unavailable to the second operator-enabled switch of the electrical circuit;
in response to the mode selection switch being actuated to a uni-directional mode setting by the operator, the first control valve via the controller, secures the first control valve in the uni-directional position, and electrical power is provided to the second operator-enabled switch of the electrical circuit.
2. The work machine of claim 1 , wherein the mode selection switch is actuated by the operator to a bi-directional mode setting in response to a bi-directional attachment being placed in fluid communication with the fluid circuit.
3. The work machine of claim 1 , wherein the mode selection switch is actuated by the operator to a uni-directional mode setting in response to a uni-directional attachment being placed in fluid communication with the fluid circuit.
4. The work machine of claim 1 , wherein the first control valve includes a solenoid to selectively secure the control valve in the uni-directional position.
5. The work machine of claim 1 , wherein the fluid circuit is configured for use with an open-center hydraulic system.
6. The work machine of claim 5 , comprising a second control valve upstream of the first control valve.
7. The work machine of claim 6 , wherein the second control valve is a variable flow control valve.
8. The work machine of claim 1 , wherein the fluid circuit is configured for use with an closed-center hydraulic system.
9. The work machine of claim 8 , comprising a second control valve arranged in parallel with the first control valve in the fluid circuit.
10. The work machine of claim 9 , wherein the second control valve is a variable flow control valve.
11. The work machine of claim 1 , wherein the work machine is a loader backhoe.
12. A work machine comprising:
a fluid circuit for use with an attachment configured to operate using one of a uni-directional flow and a bi-directional flow through the attachment;
the fluid circuit including an operator-enabled mode selection switch operably connected to a controller;
an electrical circuit comprising the operator-enabled mode selection switch and a second operator-enabled switch; and
a first control valve in fluid communication with the attachment, the first control valve comprising a first bi-directional position, a uni-directional position and a second bi-directional position, the first control valve including a solenoid to selectively secure the control valve in the uni-directional position;
in response to the mode selection switch being actuated to a bi-directional mode setting by the operator, the first control valve via the controller, is actuatable by the operator to one of the bi-directional positions, and electrical power is unavailable to the second operator-enabled switch of the electrical circuit;
in response to the mode selection switch being actuated to a uni-directional mode setting by the operator, the first control valve via the controller, secures the first control valve in the uni-directional position, and electrical power is provided to the second operator-enabled switch of the electrical circuit.
13. The work machine of claim 12 , wherein the work machine is a loader backhoe.