Abstract: An earthwork target model generation system comprises a processor. The processor of the earthwork target model generation system stores a three-dimensional topography shape model and drill boring data in the target model generation system, generates a three-dimensional ground model using the three-dimensional topography shape model and the drill boring data, generates three-dimensional normal surface information in consideration of a design condition for each rock quality using the three-dimensional ground model, and sets the design condition.

Abstract: A control system for construction machinery, includes a hydraulic pump, first and second actuators connected to the hydraulic pump through first and second parallel lines respectively, first and second control valves installed in the first and second parallel lines respectively and configured to control operations of the first and second actuators, first and second spool displacement adjusting valves configured to control displacement amounts of the spools of the first and second control valves, and a control valve control portion configured to output the control signal, and configured to limit a maximum allowable value of the manipulation signal for the first actuator to a value selected by the operator and limit a spool displacement amount of the second control valve according to the limited manipulation signal for the first actuator when the manipulation signal for a multiple operation of the first and second actuators is received.

Abstract: A smart door apparatus may include an actuator and a harness. The actuator may be installed at a door rotatably connected with a cabin of the construction machine via a hinge mechanism. The actuator may be configured to operate a locking apparatus of the door by signals of a smart key. The harness may be arranged in an axial direction of the hinge mechanism to supply electricity to the actuator. Thus, only torsion may be applied to the harness regardless of rotation angles of the door to increase a lifespan of the harness.

Abstract: A control system for construction machinery, includes a hydraulic pump, at least one control valve installed in a center bypass line connected to the hydraulic pump and configured to control a flow direction of a working oil discharged from the hydraulic pump to selectively supply the working oil to an actuator, a bypass control valve installed downstream from the control valve in the center bypass line to variably control an amount of the working oil draining to a drain tank through the center bypass line, and a controller configured to control operations of the hydraulic pump and the bypass control valve according to a manipulation signal of an operator and to open the bypass control valve according to pump peak occurrence to reduce a pump peak.

Abstract: An exhaust gas post-processing system according to an embodiment of the present invention includes: an exhaust flow path for moving an exhaust gas discharged from an engine; at least one aftertreatment device installed on the exhaust flow path and purifying the exhaust gas; a burner installed on the exhaust flow path and heating the exhaust gas upstream of the at least one aftertreatment device; a fuel supplier for supplying a fuel to the burner; and an air supply flow path for supplying an air to the burner. The air supply flow path supplies a part of the exhaust gas discharged from the engine as the air to the burner.

Abstract: The present specification relates to a system and a method for preventing overheating of an axle in a construction equipment. A system for preventing overheating of an axle in a construction equipment is mounted in the construction equipment and transmits driving power of an engine to a wheel, and the system includes: a brake pedal; a brake sensor which detects displacement of the brake pedal when the brake pedal is manipulated by an operator; an exhaust brake which is mounted in the engine and operates and controls an opening degree of an exhaust gas discharge passageway of the engine; and a control unit which adjusts the opening degree of the exhaust gas discharge passageway by controlling the exhaust brake corresponding to the displacement of the brake pedal when manipulation of the brake pedal is detected by the brake sensor.

Abstract: A hydraulic system of construction machinery includes: a boom cylinder divided; a first boom hydraulic line serving to supply a hydraulic oil to the boom cylinder during an ascending operation of a boom; a second boom hydraulic line serving to supply the hydraulic oil to the boom cylinder during a descending operation of the boom; a regeneration line serving so that the hydraulic oil discharged from the head side of the boom cylinder flows during the descending operation of the boom; a circulation line connected to the second boom hydraulic line; an accumulator connected to the regeneration line and serving to accumulate the hydraulic oil discharged from the boom cylinder; a boom regeneration valve including a first regeneration spool and a second regeneration spool; and a control unit serving to adjust opening areas of the first regeneration spool and the second regeneration spool during the descending operation of the boom.

Abstract: A control system for construction machinery, includes a hydraulic pump, first and second actuators connected to the hydraulic pump through first and second parallel lines respectively, first and second control valves installed in the first and second parallel lines respectively and configured to control operations of the first and second actuators, first and second spool displacement adjusting valves configured to control displacement amounts of the spools of the first and second control valves, and a controller configured to output a control signal to the first and second spool displacement adjusting valves corresponding to a manipulation signal of an operator, and configured to limit a spool displacement amount of the second control valve according to the manipulation signal for the first actuator when the manipulation signal for a multiple operation of the first and second actuators is received.

Abstract: An adapter for a roller tappet of an engine may include a body and a support. The body may be combined with a cylinder block of the engine. The body may include oil inlet connected to main gallery of the cylinder block to receive an oil from the main gallery. The support may be extended from one end of the body to support the roller tappet. The support may include a first oil passageway connected to the oil inlet. The first oil passageway is formed through the body and the support to supply the oil supplied from the oil inlet to the roller tappet. Thus, the oil may be supplied from the main gallery to the roller tappet through the oil passageway so that it may not be required to form an additional oil passageway, which may supply the oil to the roller tappet, in the cylinder block.

Abstract: A canopy assembly includes a lower canopy installed fixedly in a side of a driver's seat and including a pair of first and second lower pipes that extend upwardly respectively, a pair of fastening blocks inserted and fixed into the first and second lower pipes respectively, each of the fastening blocks having a receiving hole therein that extends from an upper surface into the inside thereof, and an upper canopy including a pair of first and second upper pipes that are inserted and fixed into the receiving holes of the fastening blocks respectively.

Abstract: Disclosed are a construction machine and a method of controlling a construction machine. The construction machine includes: a first pump and a second pump; an engine which provides available torque to the first pump and the second pump; a first joystick and a second joystick which control actuators operated by a working fluid discharged from the first pump and the second pump; a joystick operation amount acquiring unit which acquires operation amounts of the first joystick and the second joystick; and a control unit which adjusts a torque distribution ratio with respect to the first pump and the second pump in accordance with the operation amounts of the first joystick and the second joystick when a sum of required torque of the first pump and required torque of the second pump is higher than the available torque.

Abstract: A construction machine includes: one or more hydraulic pumps discharging a working fluid; an engine supplying a rotational power to the hydraulic pumps; a hydraulic line through which the working fluid discharged by the hydraulic pumps moves; a main control valve provided on the hydraulic line and controlling supply of the working fluid to a traveling device or one or more of various working devices, which require the working fluid; a bypass cut valve provided on the hydraulic line at a lower side thereof than the main control valve to open and close the hydraulic line; an automatic warm-up switch generating a warm-up operation signal for raising a temperature of the working fluid before an operation starts; and a control device performing a warm-up operation for increasing the number of revolutions of the engine and opening the bypass cut valve to increase a flow rate along the hydraulic line, when the warm-up operation signal is received from the automatic warm-up switch.

Abstract: The present disclosure relates to a method for controlling a swing motor in a hydraulic system and a hydraulic system. The method for controlling the swing motor in the hydraulic system and the hydraulic system according to the exemplary embodiment of the present disclosure may ensure the sufficient amount of hydraulic oil in a make-up line in a situation in which the hydraulic oil needs to be supplementarily supplied to the swing motor in the hydraulic system. Therefore, it is possible to prevent the occurrence of cavitation in the swing motor by stably supplying the amount of hydraulic oil at the point in time where the hydraulic oil needs to be supplementarily supplied to the swing motor. In addition, it is possible to prevent the occurrence of abnormal noise which is harsh to the ear when the cavitation occurs.

Abstract: A travel control system for construction machinery includes first and second hydraulic pumps, a first travel motor and a second travel motor operable by a working oil discharged from the first hydraulic pump or the second hydraulic pump, at least one actuator operable by the working oil discharged from the first hydraulic pump or the second hydraulic pump, a straight travel valve to be switched between a first position and a second position, first and second travel motor control valves configured to control amounts of the working oil supplied to the first and second travel motors, first and second spool displacement adjusting valves supplying pilot signal pressures to the spools of the first and second travel motor control valves respectively, and a controller configured to output a control signal to each of the first and second spool displacement adjusting valves corresponding to a manipulation signal of an operator.

Abstract: An exhaust gas guiding device includes an exhaust passageway, an exhaust pipe and an exhaust cover. The exhaust passageway is formed in a bonnet of the construction machine to connect an engine room with an exterior of the construction machine. The exhaust pipe is connected to the exhaust passageway. The exhaust cover is installed at the exhaust passageway to protrude from the bonnet to guide the exhaust gas to the exterior. The exhaust cover having a cylindrical shape connected to the exhaust passageway includes a cover body and an exhaust portion. The exhaust portion is slantly connected to the cover body to guide the exhaust gas in an extending direction of the exhaust portion. The exhaust pipe is positioned adjacent to an inner surface of the cover body. The exhaust pipe has a central axis away from a central axis of the exhaust cover.

Abstract: A screen display system of construction equipment includes a plurality of cameras configured to generate camera image data, an AVM controller configured to generate an AVM (Around View Monitor) image data based on the camera image data and select at least one of the AVM image data and the camera image data as a first image data based on a first failure flag, an additional information synthesizer configured to output second image data based on the first image data, and a main display configured to display an image corresponding to one of the first image data and the second image date based on a second failure flag representing whether or not a failure occurs in the additional information synthesizer.