A hydraulic excavator includes a traveling body, a slewing body, a working front having a boom, an arm, and a bucket, an operation amount detector, a posture detector, a load detector, a drive controller, and a drive unit. The drive controller calculates a target operation speed of the actuator based on the operation amount, the posture of the working front, and the target surface distance so that the bucket excavates along the construction target surface, and determines soil hardness of a place to be excavated based on a result detected by the load detector, corrects the target operation speed based on the soil hardness, and generates a motion command value. The drive controller determines a target jack-up speed when the hydraulic excavator jacks up based on the target surface distance, and corrects the target operation speed based on the determined target jack-up speed.

A shovel includes a plurality of driven elements, a plurality of actuators configured to drive the plurality of driven elements, and a hardware processor configured to, in response to detecting that two or more actuators of the plurality of actuators are synchronously moved, prohibit a motion of another actuator of the plurality of actuators that is different from the two or more actuators of the plurality of actuators.

A hydraulic system for operating a circle drive gear of a grading machine includes a pump configured to output pressurized fluid, a directional control valve fluidly coupled to the pump, a bidirectional hydraulic motor located downstream of the directional control valve and fluidly coupled to the directional control valve via hydraulic lines. The hydraulic motor has an output shaft that is configured to be rotationally driven by pressurized fluid output by the pump. Dual counterbalance valves may be disposed within the hydraulic circuit of the directional control valve and hydraulic motor such that any gearbox driven by the hydraulic motor is protected from external opposing forces. Accordingly, motion in the circle drive system is hydraulically locked at the beginning and release of a circle rotation command with the help of fluid pressure in the hydraulic lines.

A hydraulic machine. A high pressure line allows working fluid to flow into a hydraulic motor. A low pressure line allows working fluid to flow out of the hydraulic motor. High pressure line valves open and close the high pressure line. Low pressure line valves open and close the low pressure line. An operator input device inputs a command to control movement of the hydraulic motor. A control unit controls the high pressure line valves and the low pressure line valves to be opened and closed by receiving the command from the operator input device. The control unit controls the high pressure line valves to have a normalized flow factor K.sub.vHP, and controls the low pressure line valves to have a normalized flow factor K.sub.vLP, where K.sub.vLP<K.sub.vHP when a normalized flow factor K.sub.vcmd corresponding to the command is 0<K.sub.vcmd<1.

An excavator includes a rotatable house and a bucket operably coupled to the rotatable house. The excavator also includes one or more swing sensors configured to provide at least one rotation sensor signal indicative of rotation of the rotatable house and one or more controllers coupled to the sensor. The one or more controllers being configured to implement inertia determination logic that determines the inertia of a portion of the excavator and control signal generator logic that generates a control signal to control the excavator, based on the inertia of the portion of the excavator.

A control system for controlling a tool of a machine includes at least one controller and detecting means. The detecting means includes at least one range finder device for at least partly detecting and positioning an object with regards to the tool in 3D space. An operation mode of the at least one controller depends at least in part on the object. A machine and a method for controlling a tool of the machine are also disclosed.

An excavator including a lower traveling body; an upper turning body turnably mounted to the lower traveling body; a hydraulic actuator configured to drive a driven part including the lower traveling body and the upper turning body; a hydraulic pump configured to supply hydraulic oil to the hydraulic actuator; a motor configured to drive the hydraulic pump; and a power storage device configured to supply power to the motor. The power storage device is mounted at a right front portion of the upper turning body. The hydraulic pump and the motor are mounted at a rear portion of the upper turning body.

An excavator includes a lower traveling body; an upper turning body turnably mounted to the lower traveling body; an actuator configured to drive a driven part including the lower traveling body and the upper turning body; and a power storage device mounted in the upper turning body and configured to serve as an energy source for driving the actuator. The power storage device includes a plurality of power storage modules stacked in a vertical direction, each of the plurality of power storage modules including a power storage part and a housing configured to house the power storage part. The housings of power storage modules among the plurality of power storage modules that are adjacent to each other in the vertical direction, are coupled to each other.

An operation control device for a working vehicle comprises a hydraulic actuator to drive the hydraulic working device, operating oil supply source for driving the hydraulic actuator, an operating oil supply control device that performs control to supply operating oil to the hydraulic actuator, an operating device to be operated to make the hydraulic actuator work and a working gain setting device that sets a gain of working speed of the hydraulic actuator corresponding to the operation of the operating device. The operating oil supply control device controls operating oil supply from the operating oil supply source to the hydraulic actuator based on the operation output signal from the operating device and the working speed gain set by the working gain setting device.

A type of an object is determined and the movement direction of the object is predicted on the basis of a sensing result of the object sensed by an on-machine obstacle sensor. Information relating to the object that is the object sensed by the on-machine obstacle sensor and has been determined to have moved to the outside of a sensing range of the on-machine obstacle sensor is immediately deleted from an environment map on the basis of the type and the movement direction of the object. This can properly process information on the object that has gotten out of the sensing range, according to the cause of the object getting out of the sensing range.