E02F3/84

MOTOR GRADER AND METHOD OF CONTROLLING MOTOR GRADER
20230060128 · 2023-03-02 · ·

A motor grader includes an operation apparatus, a swing circle, a blade supported on the swing circle, a first actuator arranged along a longitudinal direction of the blade, the first actuator moving the blade in a lateral direction with respect to the swing circle, and a controller that causes the first actuator to operate. The controller receives an operation signal from the operation apparatus and causes the first actuator to operate based on the received operation signal such that a position of the blade with respect to the swing circle comes closer to a neutral position of the blade with respect to the swing circle.

CONTROL SYSTEM, METHOD OF CONTROLLING WORK VEHICLE, AND WORK VEHICLE
20220325499 · 2022-10-13 · ·

A motor grader representing a work vehicle includes a steering mechanism and a control unit. The control unit generates a travel path of the motor grader based on a position and an azimuth of the motor grader and a direction of travel of the motor grader and controls the steering mechanism such that the motor grader travels along the generated travel path.

Grader and blade control method

A grader and a blade control method wherein the grader includes: a blade mechanism including a blade; a blade adjusting mechanism including a plurality of adjusting means respectively corresponding to at least two degrees of freedom of the blade, and configured to adjust a spatial position and/or angle of the blade; a blade position detecting mechanism configured to detect a slope parameter for characterizing a spatial position of the blade; a motion trajectory library configured to store motion functions of the plurality of adjusting means respectively when different operation conditions and/or different grades are switched; a controller configured to call a corresponding motion function in the motion trajectory library according to a set operation condition and a required slope, and control at least one of the plurality of adjusting means according to a position parameter of the blade and the motion function.

Self-propelled work vehicle and control method for blade stabilization accounting for chassis movement
11629477 · 2023-04-18 · ·

Systems and methods are disclosed herein for controlling a work implement (e.g., front-mounted blade) relative to a work vehicle to produce a desired profile in a ground surface. Chassis-mounted sensor(s) detect an actual pitch velocity and an actual pitch angle of the chassis relative to the ground. Further sensor(s) detect an actual lift position of the blade relative to the chassis. A desired profile to be produced by the blade with respect to the ground surface is determined, for example via an automated grade control system, via manually-initiated trigger(s), and/or via time-based rolling averages of detected values. A position of the implement is automatically controlled as a function of each of the actual pitch velocity, the actual pitch angle of the chassis relative to the ground, and the actual lift position of the work implement relative to the chassis, corresponding to the desired profile with respect to the ground surface.

SYSTEM AND METHOD FOR CONTROLLING WORK MACHINE, AND WORK MACHINE
20230160184 · 2023-05-25 ·

A controller acquires a target soil amount in one work path with respect to an actual topography. The controller determines a target profile in the one work path based on the target soil amount. The controller performs work in the one work path by operating a work implement according to the target profile. The controller acquires a maximum traction force of the work machine during the one work path. The controller determines whether the maximum traction force is smaller than a reference traction force. The controller increases the target soil amount in a next work path when the maximum traction force is smaller than the reference traction force. The controller determines the target profile in the next work path based on the increased target soil amount.

Motor, power unit, and bulldozer

A motor includes a rotor including a rotating shaft extending along a center axis, a cylindrical rotor core provided outside the rotating shaft in a radial direction, and two discoid weight plates provided at two ends of the cylindrical rotor core in an axial direction, and a stator opposing the rotor in the radial direction. A radius of each weight plate is smaller than a radius of the rotor core, and a difference between the radius of the rotor core and the radius of each weight plate is larger than an air gap between an outside of the rotor core in the radial direction and an inside of the stator in the radial direction.

Motor, power unit, and bulldozer

A motor includes a rotor including a rotating shaft extending along a center axis, a cylindrical rotor core provided outside the rotating shaft in a radial direction, and two discoid weight plates provided at two ends of the cylindrical rotor core in an axial direction, and a stator opposing the rotor in the radial direction. A radius of each weight plate is smaller than a radius of the rotor core, and a difference between the radius of the rotor core and the radius of each weight plate is larger than an air gap between an outside of the rotor core in the radial direction and an inside of the stator in the radial direction.

APPARATUS AND METHOD FOR INTELLIGENT GRADE CONTROL ON A GRADING MACHINE

A grading machine and method for grading a ground surface including a machine body, a drawbar frame coupled to the machine body, a movable grading device coupled to the drawbar frame, a drive arrangement coupled to the drawbar frame and a circle member, a pitch frame coupled to the circle member, a movable grading device coupled to the pitch frame, a right lift linkage arrangement, a left lift linkage arrangement, a circle member side shift linkage arrangement, a grading device side shift linkage, a pitch actuator, a user interface, and a control system. The control system is configured to receive an input command from the user interface for a target grading device movement and adjust one or more of the right lift actuator, the left lift actuator, the side shift actuator, and the drive arrangement to achieve the target grading device movement using a first control pattern or a second control pattern.

Control system for a grading machine
11466427 · 2022-10-11 · ·

A grading machine include a machine body, a grading blade, at least one grading blade sensor configured to sense a position and orientation of the grading blade, a drawbar connecting the grading blade to the machine body, a drawbar centershift cylinder, a user interface, and a control system. The control system is configured to receive an input from the user interface and position and orient the grading blade and the drawbar to one of a plurality of predetermined maintenance positions based on the input.

Material moving machines and pilot hydraulic switching systems for use therein

In accordance with one embodiment of the present disclosure, a material moving machine comprises a pilot hydraulic switching system. The pilot hydraulic switching system comprises a control unit, a first directional valve, and a second directional valve. The control unit is configured to operate the first and second directional valves to shift a variable position actuator valve between a static state, a retract state, and an extend state. The actuator valve comprises a first and second control element. In the retract and extend states, the first and second directional valves control fluid flow to the variable position actuator valve with a positive net pressure on either the first or second control elements and a negative net pressure on the other control element to move the material moving implement. In the static state, the first and second directional valves control fluid flow equally on the first and second control elements.