Abstract: A motor grader including a main frame, an operational frame movable relative to the main frame in three directions, and a linkage system coupling the operational frame to the main frame. The linkage system includes a plurality of hydraulic cylinders each movable between an extended position and a retracted position to adjust the length thereof. The plurality of cylinders is operationally connected such that movement of one cylinder of the plurality of cylinders causes movement of at least another cylinder of the plurality of cylinders. A processor is configured to receive a signal related to the length of at least one cylinder of the plurality of cylinders, and estimate, based in part on the signal, a position of the operational frame relative to the main frame in the three directions.

Abstract: A system for controlling the speed of a hybrid work machine that has an engine assembly, an electric drive system mechanically coupled to the engine assembly, a drive mechanism configured to be driven by the electric drive system, and a controller in communication with the engine assembly, the electric drive system, and the drive mechanism. Wherein, the controller selectively engages the engine assembly, the electric drive system, and the drive mechanism to execute a braking function.

Abstract: An open loop electrohydraulic bucket position control system for a work vehicle having a positionable bucket coupled to a movable boom. The bucket control system maintains a position of the bucket with respect to a frame of the vehicle as the movable boom is raised or lowered. A bucket command, determined by an operator of the vehicle, is modified based on a pre-determined relationship of the work vehicle's hardware and known and constant properties of a linkage design of the work machine. The control system includes a processor and one or more look-up tables that include data identifying implement velocities with respect to boom commands and implement velocities with respect to bucket commands. Bucket commands are modified based on a relationship between the commanded velocity of the boom and a level orientation of the bucket during the commanded heights of the boom. Modified bucket commands and boom commands adjust the position of a bucket hydraulic cylinder and a boom hydraulic cylinder.

Abstract: A system for controllably moving a work implement of a work vehicle having a hydraulic fluid pump for providing fluid to the work implement, the system comprising: at least one operator command tool to produce an operator command signal to move the implement of the work vehicle; at least one sensor to sense a cylinder speed signal indicative of a speed of a hydraulic cylinder coupled to the implement; at least one valve to modulate the fluid flow of the hydraulic cylinder; and a controller.

Abstract: An idle state determination system and method are disclosed for a work vehicle having an engine and at least one movable work implement. The movable work implement includes a load bin. The idle state determination system includes a source of work vehicle data that indicates one or more operational parameters of the work vehicle, including at least a speed, a state of an engine and a position of the load bin. The idle state determination system including a source of idle state classifications that include a plurality of idle states associated with the work vehicle, and the plurality of idle states including at least a waiting idle state and a loading idle state. The idle state determination system includes a controller that processes the work vehicle data to determine an idle state of the work vehicle. The controller classifies the idle state as one of the plurality of idle states.

Abstract: A method and apparatus for controlling traction of a vehicle with independent drives or motors connected to the wheels or other ground engaging apparatuses. Nominal torque allocations can be determined for a set of motors, the motors connected to ground engaging elements and including a front set of motors and a rear set of motors. The nominal torque allocations can be modified based on a lateral differential correction and a fore-aft differential correction to produce modified torque commands and the modified torque commands can be applied to the set of motors.

Abstract: A control system for moving an end effector of a work machine may include sensors for determining current orientations of components of a boom assembly connected to the work machine. A controller may be configured to receive, via an input interface, signals corresponding to a velocity input command for a desired movement of the end effector. The controller may determine, based upon the velocity input command and signals from the sensors, at least one target velocity for one or more actuators for the boom assembly. Commanding the actuators to move with the at least one target velocity may cause the end effector to move with an aggregate velocity corresponding to the desired movement of the end effector, as indicated by the velocity input command.

Abstract: An idle state determination system and method are disclosed for a work vehicle having an engine and at least one movable work implement. The movable work implement includes a load bin. The idle state determination system includes a source of work vehicle data that indicates one or more operational parameters of the work vehicle, including at least a speed, a state of an engine and a position of the load bin. The idle state determination system including a source of idle state classifications that include a plurality of idle states associated with the work vehicle, and the plurality of idle states including at least a waiting idle state and a loading idle state. The idle state determination system includes a controller that processes the work vehicle data to determine an idle state of the work vehicle. The controller classifies the idle state as one of the plurality of idle states.

Abstract: A control system for moving an end effector of a work machine may include sensors for determining current orientations of components of a boom assembly connected to the work machine. A controller may be configured to receive, via an input interface, signals corresponding to a velocity input command for a desired movement of the end effector. The controller may determine, based upon the velocity input command and signals from the sensors, at least one target velocity for one or more actuators for the boom assembly. Commanding the actuators to move with the at least one target velocity may cause the end effector to move with an aggregate velocity corresponding to the desired movement of the end effector, as indicated by the velocity input command.

Abstract: A method and apparatus for controlling traction of a vehicle with independent drives or motors connected to the wheels or other ground engaging apparatuses. Nominal torque allocations can be determined for a set of motors, the motors connected to ground engaging elements and including a front set of motors and a rear set of motors. The nominal torque allocations can be modified based on a lateral differential correction and a fore-aft differential correction to produce modified torque commands and the modified torque commands can be applied to the set of motors.

Abstract: The present disclosure provides a method for selectively controlling a work machine according to a current power device load response. The work machine includes a power device having a rotary output, a traction element, a transmission configured to provide a transmission ratio between the power device and traction element, an operator input device having a plurality of positions, and a control system. The method includes receiving selected range and a position of the operator input device, determining a no-load ground speed target as a function of selected range and input device position, and determining a desired ground speed load response as a function of the selected range. A desired transmission ratio is determined as a function of current machine ground speed and machine load.

Abstract: The present disclosure provides a method for selectively controlling a work machine according to a current power device load response. The work machine includes a power device having a rotary output, a traction element, a transmission configured to provide a transmission ratio between the power device and traction element, an operator input device having a plurality of positions, and a control system. The method includes receiving selected range and a position of the operator input device, determining a no-load ground speed target as a function of selected range and input device position, and determining a desired ground speed load response as a function of the selected range. A desired transmission ratio is determined as a function of current machine ground speed and machine load.

Abstract: A loader vehicle including a frame system, a plurality of wheels, a plurality of drive units and a controller. The plurality of wheels are subject to rapidly changing loads and are associated with the frame system. The plurality of drive units are each associated with a corresponding subset of at least one of the plurality of wheels. The controller is configured to compute a slip error for one of the plurality of wheels dependent on an integral term derived from a wheel speed of at least one other of the plurality of wheels. The controller computes a slip target value for the one wheel. The controller further uses the slip error and the slip target value to arrive at a command that is applied to the drive unit corresponding to the one wheel.

Abstract: A loader vehicle including a frame system, a plurality of wheels, a plurality of drive units and a controller. The plurality of wheels are subject to rapidly changing loads and are associated with the frame system. The plurality of drive units are each associated with a corresponding subset of at least one of the plurality of wheels. The controller is configured to compute a slip error for one of the plurality of wheels dependent on an integral term derived from a wheel speed of at least one other of the plurality of wheels. The controller computes a slip target value for the one wheel. The controller further uses the slip error and the slip target value to arrive at a command that is applied to the drive unit corresponding to the one wheel.