An articulated/swivel joint for the articulated connection between a rear section and a front section of a construction machine includes a joint mechanism assigned to a swivel-stop arrangement for limiting the swivel movement of a front joint part in relation to a rear joint part. The swivel-stop arrangement includes a first swivel stop for predetermining a maximum amount of swivel deflection during deflection of the front joint part in relation to the rear joint part in a first swivel-movement direction and a second swivel stop for predetermining a second maximum amount of swivel deflection during deflection of the front joint part in relation to the rear joint part in a second swivel-movement direction. When an articulated movement is performed, the maximum swivel-deflection range decreases as the amount of articulated deflection increases, starting from a neutral position of articulation of the front joint part in relation to the rear joint part.

An articulated/swivel joint for the articulated connection between a rear section and a front section of a construction machine includes a joint mechanism assigned to a swivel-stop arrangement for limiting the swivel movement of a front joint part in relation to a rear joint part. The swivel-stop arrangement includes a first swivel stop for predetermining a maximum amount of swivel deflection during deflection of the front joint part in relation to the rear joint part in a first swivel-movement direction and a second swivel stop for predetermining a second maximum amount of swivel deflection during deflection of the front joint part in relation to the rear joint part in a second swivel-movement direction. When an articulated movement is performed, the maximum swivel-deflection range decreases as the amount of articulated deflection increases, starting from a neutral position of articulation of the front joint part in relation to the rear joint part.

A controller controls a first drive source and a second drive source based on a moving speed of a motor grader measured by a speed sensor and a turning angular velocity of the motor grader measured by an IMU, to thereby independently control a rotation speed of each of a right front wheel and a left front wheel.

A controller controls a first drive source and a second drive source based on a moving speed of a motor grader measured by a speed sensor and a turning angular velocity of the motor grader measured by an IMU, to thereby independently control a rotation speed of each of a right front wheel and a left front wheel.

Provided is a working vehicle capable of increasing lifting operation speed of a working device without increasing cost, even when provided with a circuit configuration that prioritizes a steering operation over a working device operation.

A wheel loader 1 comprises a priority valve 451 configured to allow hydraulic oil discharged from a hydraulic pump 41 to flow into a steering drive circuit 43 preferentially over a working device drive circuit 44, and further comprises: an electric steering lever 30; a pair of solenoid control valves 34A, 34B configured to control a steering directional control valve 33; and a controller 5. The controller 5 is configured to control the pair of solenoid control valves 34A, 34B so as to limit operation speed of a steering 3 when determining that an engine 40 is in a low idle state and a lift arm 21 is performing a lifting operation.

A display system of a wheel loader includes an obtaining unit that obtains work machine motion information including an articulation angle, a motion image generator that generates a motion image including an articulated state of the wheel loader based on the work machine motion information obtained by the obtaining unit, and a display that shows the motion image.

Steering a vehicle in an electronic steering mode of operation that includes a front axle steering system, a rear axle steering system, one or more vehicle environment sensors, and a controller operatively coupled with the front axle steering system, the rear axle steering system, and the vehicle environment sensors. Commanding the vehicle to operate at a desired vehicle speed, detecting a lateral force acting on the vehicle in response to input from the vehicle environment sensors, and determining an actual lateral acceleration of the vehicle and a predicted lateral acceleration of the vehicle from the desired vehicle speed. Determining a lateral acceleration error by comparing the predicted lateral acceleration to the actual lateral acceleration, and determining if the lateral acceleration error exceeds a lateral acceleration limit, then turning both of the front axle steering system and the rear axle steering system to a crab steering correction angle.

An automatic steering system and method for an articulated work vehicle having a front wheel steering system supported by front wheels at a front frame and a rear frame supported by rear wheels rotatably coupled to the front frame at an articulator. A controller operatively connected to the front wheel steering system and to the articulator adjusts wheels of the front wheel steering system along a path and moves the articulator to direct the rear frame in response to a steering signal. The steering signal directs the vehicle in a minimum turn radius mode or a controlled traffic control mode. In the minimum turn radius mode, the rear wheels do not follow the tracks of the front wheels when making a turn. In the controlled traffic mode the rear wheels follow in same tracks as the front wheels.

An automatic steering system and method for an articulated work vehicle having a front wheel steering system supported by front wheels at a front frame and a rear frame supported by rear wheels rotatably coupled to the front frame at an articulator. A controller operatively connected to the front wheel steering system and to the articulator adjusts wheels of the front wheel steering system along a path and moves the articulator to direct the rear frame in response to a steering signal. The steering signal directs the vehicle in a minimum turn radius mode or a controlled traffic control mode. In the minimum turn radius mode, the rear wheels do not follow the tracks of the front wheels when making a turn. In the controlled traffic mode the rear wheels follow in same tracks as the front wheels.

Operating a vehicle in an automated steering control mode wherein the vehicle includes a controller operatively coupled with an articulated steering system and a front axle steering system. The controller is configured to identify a desired path of curvature of the vehicle and determine a front axle steering angle of the front axle steering system and command the front axle steering system to operate at the front axle steering angle and also determine an articulation steering angle of the articulated steering system and command the articulated steering system to operate at the articulation steering angle. A further form includes operating front and rear ground engaging means at a designated speed, and thereafter operating the articulated steering system and the front axle steering system based on the designated speed being greater than a transport speed threshold, less than a field speed threshold or between the two.