An automatic terrain adjustment system automatically adjusts the forward and rearward height of a tractor-towed agricultural implement, such as a defoliator, responsive to a sensed change in the depth of terrain over which the agricultural implement traverses. The forward height of the implement is adjusted independently of the rearward height of the implement using two distinct automatic depth controlling systems. Each automatic depth controlling system utilizes a linkage in conjunction with a sensing wheel and hydraulic valve to control either a rear actuator, which adjusts a height of a rear axle of the implement, or a forward actuator, which adjusts a height of the front of the implement.

An agricultural apparatus may comprise a transversely extending main frame. The main frame may be configured to move upwards on a side when subjected to a lifting force on that side. A stabilizer apparatus may be inter-connected to the main frame and be transversely spaced outwards. and may be operable to provide support against downward acting forces. A pneumatic system may comprise at least one frame gas suspension bag and at least one stabilizer gas bag may be located proximate the stabilizer apparatus and may be in pneumatic communication with the at least one frame gas suspension bag. When the at least one gas suspension bag is filled with a pressurized gas, and the stabilizer apparatus is subjected to an upwardly directed force, the at least one stabilizer gas bag may be compressed increasing a pressure of the pressurized gas within the at least one stabilizer gas bag. Pressurized gas in the at least one stabilizer gas bag may be communicated towards the least one frame gas suspension bag, to increase the gas pressure within the at least one frame gas suspension bag, which creates a lifting force on a first side of the main frame, to cause the main frame to lift upwards.

An agricultural apparatus may comprise a transversely extending main frame. The main frame may be configured to move upwards on a side when subjected to a lifting force on that side. A stabilizer apparatus may be inter-connected to the main frame and be transversely spaced outwards. and may be operable to provide support against downward acting forces. A pneumatic system may comprise at least one frame gas suspension bag and at least one stabilizer gas bag may be located proximate the stabilizer apparatus and may be in pneumatic communication with the at least one frame gas suspension bag. When the at least one gas suspension bag is filled with a pressurized gas, and the stabilizer apparatus is subjected to an upwardly directed force, the at least one stabilizer gas bag may be compressed increasing a pressure of the pressurized gas within the at least one stabilizer gas bag. Pressurized gas in the at least one stabilizer gas bag may be communicated towards the least one frame gas suspension bag, to increase the gas pressure within the at least one frame gas suspension bag, which creates a lifting force on a first side of the main frame, to cause the main frame to lift upwards.

A tillage implement has a frame with a center section and first and second outer wing sections hingedly attached the center section such that the wing sections can be operably raised and lowered between a field-working position and a transport position. The sections each carry tillage tools for working the soil. Controlling a precharge in a secondary side of a hydraulic circuit enables the operator of the implement to adjust the downward pressure precharge provided by a plurality of hydraulic cylinders based on a desired stiffness of the implement. A pressure-reducing valve is configured such that flow from the hydraulic supply applies downward pressure precharge on the plurality of tillage tools. Once this desired precharge has been achieved, flow from the hydraulic supply is shut off and a check valve holds the pressure such that the plurality of hydraulic cylinders holds the tillage tools in position.

A tillage implement has a frame with a center section and first and second outer wing sections hingedly attached the center section such that the wing sections can be operably raised and lowered between a field-working position and a transport position. The sections each carry tillage tools for working the soil. Controlling a precharge in a secondary side of a hydraulic circuit enables the operator of the implement to adjust the downward pressure precharge provided by a plurality of hydraulic cylinders based on a desired stiffness of the implement. A pressure-reducing valve is configured such that flow from the hydraulic supply applies downward pressure precharge on the plurality of tillage tools. Once this desired precharge has been achieved, flow from the hydraulic supply is shut off and a check valve holds the pressure such that the plurality of hydraulic cylinders holds the tillage tools in position.

A system for calibrating load sensors installed on an agricultural implement. The system includes a load sensor provided in operative association with a ground engaging tool and configured to capture load data indicative of a load applied to the ground-engaging tool. The system also includes a controller communicatively coupled to the load sensor configured to determine first and second load values based on the load data received from the load sensor when the down force actuator is disposed at first and second actuator positions so as to apply first and second down forces, respectively, against the ground engaging tool. The controller is also configured to determine a relationship between the first and second load values and corresponding force values associated with the first down force and the second down force.

A system for calibrating load sensors installed on an agricultural implement. The system includes a load sensor provided in operative association with a ground engaging tool and configured to capture load data indicative of a load applied to the ground-engaging tool. The system also includes a controller communicatively coupled to the load sensor configured to determine first and second load values based on the load data received from the load sensor when the down force actuator is disposed at first and second actuator positions so as to apply first and second down forces, respectively, against the ground engaging tool. The controller is also configured to determine a relationship between the first and second load values and corresponding force values associated with the first down force and the second down force.

An agricultural implement includes a transversely extending frame forming a first, a second, and a third frame section. A first actuator is coupled to the first frame section, a second actuator coupled to the second frame section, and a third actuator coupled to the third frame section. Sensors are coupled to each frame section to detect a height of the respective frame section relative to an underlying surface. A control unit is disposed in electrical communication with the sensors and operably controls the actuators to adjust the height of each frame section.

An agricultural implement includes a transversely extending frame forming a first, a second, and a third frame section. A first actuator is coupled to the first frame section, a second actuator coupled to the second frame section, and a third actuator coupled to the third frame section. Sensors are coupled to each frame section to detect a height of the respective frame section relative to an underlying surface. A control unit is disposed in electrical communication with the sensors and operably controls the actuators to adjust the height of each frame section.

An agricultural system includes a controller having a memory and a processor. The controller is configured to determine a steering angle of a work vehicle of the agricultural system, determine a target height of a ground engaging tool of the agricultural system based on the steering angle, and output a signal to control a height of the ground engaging tool relative to a soil surface based on the target height.