A steering mechanism is used to navigate the direction of travel of a motor grader. A directional correction input device is manipulatable by an operator. A controller, during automatic control of the steering operation by the steering mechanism, controls the steering mechanism in a manner that the direction of travel is adjustable leftward or rightward through a certain angle based on an operation command inputted through the directional correction input device.

A work machine having a cab coupled to a frame, a steering system coupled to the frame, a controller configured to selectively articulate the steering system, a joystick assembly positioned in the cab and in communication with the controller, a steering wheel assembly positioned in the cab and configured to selectively articulate the steering system, and a steering wheel sensor coupled to the steering wheel assembly and in communication with the controller to identify movement of the steering wheel assembly. Wherein, the controller does not articulate the steering system responsive to movement of the joystick assembly when the steering wheel sensor identifies movement of the steering wheel.

A controller controls the steering device so as to cause a vehicle body to turn toward the left when a left steering lever is operated without a right steering lever being operated. The controller controls the steering device so as to cause the vehicle body to turn toward the right when the right steering lever is operated without the left steering lever being operated. The controller reduces the rotation speed of the engine when both the left steering lever and the right steering lever are operated and both the operation amount of the left steering lever and the operation amount of the right steering lever are equal to or greater than a first threshold.

A bulldozer includes a steering clutch, a steering brake, a hydraulic pump that discharges a lubricating oil, a first lubricating oil supply path, a second lubricating oil supply path, a third lubricating oil supply path, and a flow amount switching valve disposed on the second lubricating oil supply path. The first lubricating oil supply path supplies a portion of the lubricating oil discharged by the hydraulic pump to the steering clutch The second lubricating oil supply path supplies a portion of the lubricating oil discharged by the hydraulic pump to the steering brake. The third lubricating oil supply path supplies, to the steering brake, a portion of the lubricating oil that has passed through the steering clutch. The flow amount switching valve switches an amount of the lubricating oil supplied to the steering brake.

A construction machine comprising a chassis, a steering, and a powertrain for driving the construction machine by the chassis, an earth-moving tool for working a terrain, and a measuring system having a first measuring unit configured for generating first measuring data in a first detection range and comprising at least a first camera and a first LiDAR scanner configured for rotating a first measuring beam around a first axis and around a second axis non-parallel to the first axis with a rotating speed of at least 0.5 Hz with respect to each axis, an interface connecting the first measuring unit to a computer configured for, based on the first measuring data, at least one of generating a three-dimensional model of the terrain within the first detection range, identifying an obstacle or a person within the first detection range, and controlling the steering, the powertrain, and/or the earth-moving tool.

A method is provided for controlling a self-propelled work vehicle comprising a work attachment and at least left and right ground engaging units driven by respective first and second drivetrains. Upon determining transition from a first operating mode to a second operating mode (e.g., creep mode), the method includes selectively derating at least a portion of the drivetrain speed commands corresponding to propulsion of the work vehicle (e.g., the average of left and right track speeds), independent of a portion of the drivetrain speed commands corresponding to steering (e.g., the difference between the track speeds). The derate value may optionally be applied only to propulsion commands that produce forward motion, and not for reverse motion. Separate (non-zero) derate settings may optionally be provided for reverse and/or steering functions. Derate functionality may optionally be implemented upon detecting particular types (e.g. dozer) of attachments, or an associated work state.

A work machine includes a vehicle body, traveling wheel, steering member, actuator, operation sensor, steering angle sensor, direction sensor, and a controller. The steering member is operable between left, right, and neutral steering ranges. The actuator sets a steering angle of the traveling wheel to a neutral angle when the steering member is in the neutral range, and changes the steering angle to left or right in response to operation of the steering member. The controller acquires operation, angle, and direction signals from the sensors. The controller determines whether the steering angle has returned to the neutral angle when the steering member has been operated from the left or right steering ranges to the neutral range. The controller determines the traveling direction when the steering angle has returned to the neutral angle, as a target direction. The controller controls the actuator to hold the traveling direction in the target direction.

A hydraulic excavator includes a receiver configured to calculate a position and an azimuth angle of an upper swing structure on the basis of satellite signals received by two GNSS antennae and a controller configured to calculate a distal end position of a bucket on the basis of the position and the azimuth angle of the upper swing structure calculated by the receiver. The controller sets, on the basis of installation positions of the two GNSS antennae, a movable range of a front work device and an inclination angle and an azimuth angle of the upper swing structure, a range within which the front work device possibly becomes an obstacle to reception of satellite signals by each of the two GNSS antennae as a mask range. The receiver is configured to calculate the position and the azimuth angle of the upper swing structure on the basis of the satellite signals transmitted from the remaining satellites other than the satellites positioned in the mask range.

A method for retrofitting a high drive track-type tractor with a rear entry electric drive motor module. The method includes inserting the rear entry electric drive motor module into a frame housing. The rear entry electric drive motor module includes an electric drive planetary gear assembly, and an electric motor. The method further includes attaching a reaction member to the rear entry electric drive motor module.

A method for controlling operation of a hydraulic idle stop and go (ISG) system using an electro hydraulic power steering (EHPS) system includes measuring a pressure in an accumulator, a steering angle, and a steering angular velocity; determining whether the measured pressure in the accumulator is less than an absolute value of a first reference pressure; determining whether the measured steering angle is less than an absolute value of a reference angle when the measured pressure in the accumulator is less than the absolute value of the first reference pressure; determining whether the measured steering angular velocity is less than an absolute value of a reference angular velocity when the measured steering angle is less than the absolute value of the reference angle; and opening a solenoid valve when the measured steering angular velocity is less than the absolute value of the reference angular velocity.