Abstract: An excavator includes at least one gyro sensor for sensing the incline of equipment; a swing motor for rotating an upper body of the excavator; a first pressure sensor for sensing an operating pressure value applied to the swing motor; a swing joystick for driving the swing motor; a second pressure sensor for sensing a manipulation value inputted into the swing joystick; and a controller, wherein the controller receives pieces of information sensed by the gyro sensors, the first pressure sensor, and the second pressure sensor, and detects the operating pressure value of the swing motor, sensed through the first pressure sensor, so as to notify a worker of the time at which lubricating oil is added if a maximum manipulation value is inputted into the swing joystick for a minimum measuring time or more in a swing friction force measurement mode.

Abstract: A suspension arrangement for a bogie beam for a vehicle includes a connector having an arrangement for pivotally connecting the connector to a vehicle main body for pivoting around a substantially horizontal bogie pivot axis. The suspension arrangement includes a resilient arrangement for connecting the connector and the bogie beam to each other.

Abstract: A control method includes the steps of: providing an excavator including: several movable members configured to move parts of the excavator, one actuating set comprising several actuators, among which at least one electric actuator, one or more static brakes movable between: i) a locking position and ii) an unlocking position, a command device to receive commands from an operator, a control unit to control the actuators and the static brakes based on command signals. The control method further includes: a reception step for receiving a command signal, an actuation check step to check whether the command signal requires the control unit to actuate an actuator of the actuating set, and if yes, an unlocking step wherein the control unit releases the static brakes of the actuating set.

Abstract: An engine idling control method for a construction machine includes setting, by an E-ECU, an initial engine RPM as a starting mode (S mode) by receiving a signal from a V-ECU at the time of an engine startup; receiving, by the E-ECU, a first instruction via an engine speed control switch in a state other than an automatic idle mode; activating the automatic idle mode when the first instruction is not input to a machine during a certain time period, and setting the engine RPM as the starting mode (S mode); deactivating the automatic idle mode when a second instruction is input to the machine via the engine speed control switch while the automatic idle mode is activated; and calculating, by the V-ECU, an actual torque required for a pump for starting the machine according to the second instruction when the automatic idle mode is deactivated, and sending the actual torque to the E-ECU.

Abstract: A flow rate control apparatus for construction equipment includes: a boom cylinder driven by hydraulic fluid; a first control valve for controlling a hydraulic fluid flow supplied to the boom cylinder; an option actuator driven by hydraulic fluid; a second control valve for controlling a hydraulic fluid flow supplied to the option actuator; a boom cylinder manipulation lever and an option actuator manipulation lever; a confluence line selectively confluence the hydraulic fluid supplied to the boom cylinder with the hydraulic fluid of the option actuator; a center bypass switching valve provided at the furthest downstream side of a fluid supply path of the first hydraulic pump; a confluence switching valve selectively opening and closing the confluence line; a confluence selection valve applying a pilot pressure to the confluence switching valve; and a controller for controlling the confluence selection valve.

Abstract: A method for controlling gear shifting of a working machine includes determining a representation of a first total tractive force of the working machine for the entire set of drive units; initiating a procedure for redistributing the tractive force while maintaining the first total tractive force, including decreasing, at least partly towards a level suitable for shifting gear, the torque and tractive force of at least the first drive unit down, and increasing, in a compensational manner, the torque and tractive force of at least one of the other drive units not subject to gear shifting; monitoring, during the redistribution procedure, a representation of a second total tractive force of the working machine for the other drive units not subject to gear shifting, and, provided that the second total tractive force exceeds a threshold limit that forms a function of the first total tractive force: decreasing the torque and tractive force of at least the first drive unit down to the level suitable for shifting gea

Abstract: A control valve is provided for construction equipment having a holding valve which prevents the natural lowering of an operation apparatus due to the dead weight of the operation apparatus when an actuator is in a neutral position. The control valve includes a valve body, a spool, a holding valve, a control valve, and a pilot pressure control valve. The control valve can save manufacturing cost as well as allow better use of space for construction equipment.

Abstract: A hydraulic system for a working machine is a load sensing (LS) system and includes a first hydraulic actuator and a first control valve for controlling the flow of hydraulic fluid from a pump to the first hydraulic actuator and for draining hydraulic fluid from the first hydraulic actuator, respectively, and a second hydraulic actuator and a second control valve for controlling the flow of hydraulic fluid from the pump to the second hydraulic actuator and for draining hydraulic fluid from the second hydraulic actuator, respectively. The hydraulic system further includes a first hydraulic circuit for providing an LS pressure for the first actuator and a second hydraulic circuit for providing an LS pressure for the second actuator. At least one of the first and second hydraulic circuits includes an offset valve for changing the LS pressure before providing the LS pressure to the pump.

Abstract: A working machine that includes an internal combustion engine, a generator, an energy storage and an electric motor for driving one or more wheels of the working machine is provided. The internal combustion engine is arranged to drive the generator and the generator is arranged to supply power to the electric motor via the energy storage. The working machine further includes an accelerator for controlling the electric motor, and a hydraulic pump for driving a hydraulic actuator. The hydraulic pump has a drive source different from the electric motor and the accelerator is arranged for controlling the speed of the hydraulic pump.

Abstract: A method is provided for controlling the torque of an engine when a DPF is regenerated and includes detecting outputs of a gear pump and a main hydraulic pump as parameters for correcting a DPF regeneration condition, increasing the flow rate of the gear pump or main hydraulic pump, controlling the torque of an engine so as to reach a predetermined target engine torque value as the flow rate of the gear pump or main hydraulic pump is increased, starting DPF regeneration when the torque of the engine reaches the predetermined target engine torque value, allowing the number of revolutions of the engine to be increased on the basis of the target engine torque value during the DPF regeneration, and performing the DPF regeneration until the temperature of exhaust gas reaches a predetermined target DPF regeneration temperature.

Abstract: A power connection device is provided for transmitting electric power from an external power source to a working machine). The working machine has an undercarriage and a superstructure, and the undercarriage and the superstructure are pivotable relative to each other about a substantially vertical pivot axis. The power connection device includes a first power conductor member which is adapted to be pivotally arranged relative to the undercarriage and the superstructure about the substantially vertical pivot axis.

Abstract: A hydraulic suspension system is provided for a vehicle, the system including at least a first hydraulic cylinder and a second hydraulic cylinder, each of the hydraulic cylinders including a first chamber and a second chamber, at least four hydraulic accumulators, and at least a first and a second fluid communication path.

Abstract: A hydraulic control system includes a flow rate control valve; a variable displacement hydraulic pump which is connected to the flow rate control valve and discharges hydraulic pressure to the flow rate control valve; a pump discharge pressure detector which is installed in a section where the flow rate control valve and the variable displacement hydraulic pump are connected, and detects the discharge pressure of the hydraulic pressure discharged from the variable displacement hydraulic pump to the flow rate control valve; and a hydraulic controller including a detection unit which is connected to the pump discharge pressure detector, detects the discharge pressure of the variable displacement hydraulic pump and converts the discharge pressure to a pump discharge pressure value, a comparison unit which receives the pump discharge pressure value from the detection unit, compares the pump discharge pressure value with a pre-stored lowest recognition pressure value, and determines whether the pump discharge pres

Abstract: A device for cooling and heating a urea solution to be injected into exhaust gas discharged from an engine in order to reduce nitrogen oxides in the exhaust gas includes an engine including a cooling fan, a coolant pump, and a main cooler; a urea solution tank storing the urea solution and having an embedded heat exchange pipe through which first coolant and second coolant circulates; an additional coolant tank storing the second coolant; a water pump supplying the second coolant from the additional coolant tank to the heat exchange pipe; a valve configured to be opened or closed in order to supply the first coolant and the second coolant to the heat exchange pipe through a supply line, and to move the first coolant and the second coolant, which are discharged from the heat exchange pipe through a discharge line, to rise coolant pump and the additional coolant tank, respectively and a controller for supplying the second coolant to the heat exchange pipe through the supply line when the urea solution temperatu

Abstract: A straight traveling apparatus for a construction machine and a control method thereof are provided which can allow a curved travel when the working device is operated during the curved travel.

Abstract: A method is provided for determining whether or not ground contact loss is imminent for a wheel of a vehicle, the vehicle including a vehicle body having a vertical extension in a vertical direction, the wheel being allowed to be subjected to a relative vertical displacement, in the vertical direction, in relation to the vehicle body, the vehicle further being such that a maximum value of a vertical displacement of the wheel relative to the vehicle body is limited to a relative vertical displacement limit, the method including determining an actual relative vertical displacement of the wheel relative to the vehicle body, determining a limit margin as the difference between the actual relative vertical displacement and the relative vertical position limit, and determining that ground contact loss is imminent for a wheel if the limit margin is within a predetermined vertical threshold range.

Abstract: A tooth for attachment to the lip of a bucket of a working machine via an adaptor, having a cavity for receiving a portion of the adaptor, the cavity extending between first and second opposed outer working surfaces (12, 14) from an open end (104) to a bottom end (105); the cavity (103) delimited by an inner wall (102) having first and second facing inner walls (106, 107), and opposing side walls (108), interconnecting the first and second inner walls (106, 107). The cavity defines a back portion (BP) along the Y axis and between the plane spanned by the X and Z axes and the open end of the cavity, a front portion (FP) along the Y axis and between the plane spanned by the X and Z axes and the bottom end of the cavity; and a stepped portion (SP), interconnecting the back portion and the front portion.

Abstract: A hydraulic system is provided for a working machine that includes a hydraulic cylinder for raising and lowering an implement. The hydraulic system includes a sensor for measuring a pressure in the hydraulic cylinder; and a control unit for controlling the movement of the hydraulic cylinder; wherein the control unit is configured to compare a pressure value measured by the sensor with a preset target pressure level range and to control the pressure in the hydraulic cylinder to be within the preset target pressure level range by adding or draining hydraulic fluid to/from a pressure side of the hydraulic cylinder for maintaining a substantially constant ground contact force between the implement and the ground.

Abstract: A climate system for providing air to a cab of a vehicle includes a first conduit, an outlet end of the first conduit being adapted to be arranged inside of the cab, a pressurized air source, an inlet end of the first conduit being connected to the pressurized air source for supplying compressed air into the cab by the first conduit.