Machine having hydraulically actuated implement system with combined ride control and downforce control system
First Claim
1. A machine comprising:
- a frame;
ground engaging propulsion elements coupled with the frame;
a hydraulically actuated implement system coupled with the frame, and including a linkage configured to couple with an implement, a hydraulic actuator coupled with the linkage and the frame, and a combined ride control and downforce control circuit configured to implement a ride control mode and a downforce control mode, the combined ride control and downforce control circuit including a switching valve, the switching valve configured to actuate the ride control and downforce control circuit between the ride control mode and downforce control mode;
the ride control mode configured to maintain a pressure of hydraulic fluid in the hydraulic actuator at a ride control pressure; and
the downforce control mode configured to maintain the pressure of hydraulic fluid in the hydraulic actuator at a downforce control pressure to oppose the weight of the linkage and the implement such that the implement is controllably rested upon and engages a substrate positioned under the implement with a predetermined down force pressure which is proportionate to the downforce control pressure,wherein a downforce control position of the switching valve is configured to actuate the combined ride control and downforce control circuit to the downforce control mode and adjust the pressure of hydraulic fluid in the hydraulic actuator to the downforce control pressure.
1 Assignment
0 Petitions
Accused Products
Abstract
A machine is disclosed. The machine can include a frame and ground engaging propulsion elements coupled with the frame. A hydraulically actuated implement system can be coupled with the frame, and can include a linkage configured to couple with an implement, a hydraulic actuator coupled with the linkage and the frame, and a ride control and downforce control circuit configured to implement a ride control mode and a downforce control mode. The ride control mode can be configured to maintain a pressure of hydraulic fluid in the hydraulic actuator at a ride control pressure, and the downforce control mode can be configured to maintain the pressure of hydraulic fluid in the hydraulic actuator at a downforce control pressure to oppose the weight of the linkage and the implement such that the implement engages a substrate with a predetermined down force pressure which is proportionate to the downforce control pressure.
19 Citations
12 Claims
-
1. A machine comprising:
-
a frame; ground engaging propulsion elements coupled with the frame; a hydraulically actuated implement system coupled with the frame, and including a linkage configured to couple with an implement, a hydraulic actuator coupled with the linkage and the frame, and a combined ride control and downforce control circuit configured to implement a ride control mode and a downforce control mode, the combined ride control and downforce control circuit including a switching valve, the switching valve configured to actuate the ride control and downforce control circuit between the ride control mode and downforce control mode; the ride control mode configured to maintain a pressure of hydraulic fluid in the hydraulic actuator at a ride control pressure; and the downforce control mode configured to maintain the pressure of hydraulic fluid in the hydraulic actuator at a downforce control pressure to oppose the weight of the linkage and the implement such that the implement is controllably rested upon and engages a substrate positioned under the implement with a predetermined down force pressure which is proportionate to the downforce control pressure, wherein a downforce control position of the switching valve is configured to actuate the combined ride control and downforce control circuit to the downforce control mode and adjust the pressure of hydraulic fluid in the hydraulic actuator to the downforce control pressure. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. A control system for a hydraulically actuated implement system in a machine comprising:
-
an electronic control unit in electronic communication with a combined ride control and downforce control circuit, the combined ride control and downforce control circuit connected in fluid communication between a hydraulic pump and a hydraulic actuator, the combined ride control and downforce control circuit including a switching valve configured to actuate the ride control and downforce control circuit between the ride control mode and downforce control mode; the electronic control unit configured to receive a ride control activation command, and responsively actuate the combined ride control and downforce control circuit to a ride control mode, the ride control mode maintaining a pressure of hydraulic fluid in the hydraulic actuator at a ride control pressure; the electronic control unit configured to receive a downforce control activation command, and responsively actuate a downforce control position of the switching valve that is configured to actuate the combined ride control and downforce control circuit to a downforce control mode, the downforce control mode maintaining the pressure of hydraulic fluid in the hydraulic actuator at a downforce control pressure to oppose the weight of a linkage and an implement such that the implement engages a substrate positioned under the implement with a down force pressure which is proportionate to the downforce control pressure. - View Dependent Claims (9, 10, 11, 12)
-
Specification