Abstract: An embodiment of the present invention provides a regeneration system of energy released from a working implement, which includes an actuator configured to move up and down the working implement, an accumulator configured to communicate with the actuator, and a controller configured to receive a pressure value of the actuator and a pressure value of the accumulator to control a discharge operation of the accumulator based on a pressure difference value between the actuator and the accumulator.

Abstract: The invention relates to a support assembly for supporting a vehicle including an articulated interconnecting assembly pivotable connectable to a lower part of the working machine; a telescopic arrangement connected to said articulated interconnecting assembly and including a guiding frame and a telescopic extension member displaceable arranged relative the guiding frame; a foot connected to said telescopic extension member; an articulated linkage arrangement having a linkage arm connectable at one end to a linear actuator for effecting a movement of said articulated interconnecting arrangement and at a second end pivotable connected to one end of a connecting rod, said connecting rod being pivotable connected to the telescopic extension member at a second end, wherein said telescopic extension member includes a channel for accommodating a portion of the connecting rod.

Abstract: A method is disclosed for controlling brake forces of a working machine, the working machine including a frame and two front wheels and two rear wheels mounted to the frame, the working machine further including a front wheel brake arranged to brake at least one of the front wheels, and a rear wheel brake arranged to brake at least one of the rear wheels, the front wheel brake being controllable independently of the rear wheel brake, and vice versa, the working machine further including an implement connected to the frame so as to be movable in relation to the frame. The method includes determining a position of the implement in relation to the frame, and distributing the brake forces between the front and rear wheel brakes at least partly based on the determined implement position.

Abstract: An energy recuperation system for construction equipment includes an actuator driving upward and downward operations of a work unit; an accumulator connected to the actuator; and a controller determining a predicted downward mode associated with the downward operation of the work unit, regulating a dischargeable lowest limit pressure of the accumulator to a target pressure corresponding to the predicted downward mode, and charging the accumulator having the dischargeable lowest limit pressure regulated to the target pressure with pressurized oil discharged from the actuator during the downward operation of the work unit to recuperate energy, and an energy recuperation method.

Abstract: A surface compactor machine includes a cylindrical drum defining a cylindrical space in an interior portion of the cylindrical drum and having a central axis of rotation, and a counterweight in the cylindrical space. The compactor further includes a non-driven support wheel affixed to the counterweight and in contact with an underlying portion of an interior surface of the cylindrical drum beneath the counterweight. A drive motor is provided in the cylindrical space, and a drive wheel is mechanically rotatable by the drive motor. The drive wheel contacts an inner surface of the cylindrical drum such that rotation of the drive wheel by the drive motor urges the cylindrical drum to rotate about the central axis of rotation.

Abstract: In a hydraulic machine, first travel control valve and a first attachment control valve are in fluid communication with a second hydraulic source. A confluence control valve is in fluid communication with a first hydraulic source and, in a confluence position, directs fluid from the first hydraulic source to the first attachment control valve. A first signal line and a first pilot line are connected to the confluence control valve. When the first travel control valve is in a non-neutral position and the first attachment control valve is in a first non-neutral position, first signal pressure is generated in the first signal line to move the confluence control valve to the confluence position. First pilot pressure, when generated in the first pilot line, moves the confluence control valve to the confluence position.

Abstract: Provided are methods for controlling loading/unloading of a material (from a load-delivering unit to a load-receiving unit, wherein at least one of the load-delivering unit and the load-receiving unit is a working machine vehicle configured to transport a load of material from a first location to a second location, and wherein at least the load-delivering unit is provided with a control unit configured to control operation of the load-delivering unit. Methods include receiving a first signal indicative of the material associated with the load-delivering unit; receiving a second signal indicative of the material intended to be received by the load-receiving unit; and comparing material information related to the first signal with material information related to the second signal.

Abstract: A wheel hub arrangement for a driving wheel of a vehicle is provided. The wheel hub arrangement is provided with a planetary gear train including: a centrally arranged sun gear wheel fixed to a drive shaft that extends in an axial direction of the wheel hub arrangement; a set of planet gear wheels distributed circumferentially around and meshing with the sun gear wheel; a ring gear wheel member extending circumferentially around the planet gear wheels and being provided with a ring gear wheel meshing with the planet gear wheels; a stationary planet wheel carrier; an annular rolling-element bearing arranged between the ring gear wheel member and the planet wheel carrier, wherein the ring gear wheel member is configured to be fixed to the driving wheel of the vehicle.

Abstract: A coolant system for an electric vehicle having first and second heat generating components includes a fluid circuit that circulates a coolant therethrough and a coolant assembly. The coolant assembly decreases the temperature of a portion of the coolant to a first temperature and supplies the portion of coolant to the first heat generating component via a first supply branch of the fluid circuit, and decreases the temperature of a remaining portion of the coolant to a second temperature and supplies the remaining portion of coolant to the second heat generating component via a second supply branch of the fluid circuit. The system includes a first pump unit, arranged downstream of the coolant assembly in the first supply branch, that directs the portion of coolant to the first heat generating component, and a second pump unit that directs the remaining portion of coolant to the second heat generating component.

Abstract: An assembly for releasably engaging an upper vehicle part with a base vehicle part comprises the upper vehicle part, the base vehicle part and a securing assembly for ensuring that the upper vehicle part is secured to the base vehicle part in an operational state of the vehicle. The securing assembly comprises an inter-connecting member adapted to extend from the upper vehicle part to the base vehicle part in said operational state, said inter-connecting member having a body portion and a projecting portion defining an abutment surface. The securing assembly further comprises a releasable fixation support having a recess adapted to accommodate a part of the body portion, wherein another part of the releasable fixation support is capable of restricting displacement of said inter-connecting member in a direction towards said upper part vehicle by engaging with said abutment surface of said projecting portion in said operational state.

Abstract: A dump body for a hauler vehicle, and a hauler vehicle adapted for such a body. The dump body can be equipped to an autonomous, and electric or hybrid, working machine. The working machine includes a dump body and a working machine frame. The dump body includes at least one guide portion having a guide surface facing downwards and being arranged at the load supporting end portion, the guide portion being configured to transfer the load of the dump body, and a second end portion of the working machine frame includes at least one guiding plate arranged to receive the at least one guide portion of the dump body, whereby the guide portion and the at least one guiding plate are arranged such that the dump body is guided towards a centered position on the working machine during a pivotal downward movement towards said working machine frame of the working machine.

Abstract: A hydraulic system for a working machine includes a feeding pump; and a plurality of variable displacement hydraulic machines being connected in parallel to the feeding pump; At least one of the variable displacement hydraulic machines is adapted to drive a ground engagement element of the working machine, and at least one of the variable displacement hydraulic machines is adapted to drive a vibrator for vibrating a ground engagement element of the working machine.

Abstract: A rotary displacement piston pump is disclosed having rotatable single or dual valve/port plate(s). The valve plate, being rotatable forward and/or rearward with respect to the rotation of the piston carrier, alters the phasing of the land area of the pumping action thereby altering the phasing of piston speed inasmuch as the land area can be moved to a position to accelerate the piston(s) in a pre or decompression phase. In this way, pump noise, from colliding pressure fronts within the respective high and low pressure plenums, can be “tuned” out of the pump by adjusting the phasing and position of the valve plate(s) and raising or lowering the pre and decompression pressure(s) as necessary. Pump volume can also be controlled by advancing or retarding the valve plate(s), either in or out of synch, so as to shorten intake/exhaust piston stroke and overlap fluid flow between respective intake/exhaust plenums.

Abstract: A compaction machine may include a chassis, first and second drums rotatably mounted to the chassis, first and second vibration mechanisms, and a vibration controller. The first vibration mechanism may be configured to generate vibrations that are transmitted as impacts by the first drum to a work surface, and the second vibration mechanism may be configured to generate vibrations that are transmitted as impacts by the second drum to the work surface. The vibration controller may be configured to control at least one of the first and second vibration mechanisms so that a first pattern of impacts transmitted to the work surface by the first drum and a second pattern of impacts transmitted to the work surface by the second drum are coordinated as the compaction machine moves over the work surface. Related controllers and methods are also discussed.

Abstract: A method for evaluating a state of charge of a rechargeable battery of an electrical system. The electrical system includes one primary power source and a rechargeable battery as a secondary power source, a DC/DC converter and an electrical network comprising a primary electrical network that connects the primary power source to the DC/DC converter and a secondary electrical network that connects the rechargeable battery to at least the DC/DC converter. The DC/DC converter converts an input DC voltage supplied by the at least one primary power source into an output DC voltage supplied to the secondary electrical network. The at least one primary power source and the rechargeable battery are connected in parallel to at least one electrical load and are configured to supply, via the electrical network, DC voltage and DC current to the electrical load.

Abstract: A vibration assembly for a surface compactor machine includes a support subassembly connected to the compacting surface of the surface compactor machine. A primary eccentric shaft is disposed around a secondary eccentric shaft, with the primary and secondary eccentric shafts both rotatable about a common axis of rotation. One or more of primary bearing subassemblies is disposed between the primary eccentric shaft and the support subassembly for supporting the primary eccentric shaft during rotation of the primary eccentric shaft. One or more secondary bearing subassemblies is disposed between the secondary eccentric shaft and the primary eccentric shaft for supporting the secondary eccentric shaft during rotation of the primary eccentric shaft.

Abstract: Provided is a hydraulic circuit of construction equipment, including a boom cylinder for controlling ascending and descending movement of a boom, which includes a valve unit having a first control valve configured to control a large chamber of the boom cylinder to selectively communicate with a small chamber of the boom cylinder, a second control valve configured to control the large chamber to selectively communicate with an oil tank, a third control valve configured to control the large chamber to selectively communicate with an accumulator, and a fourth control valve configured to control a part of hydraulic oil flowing to the accumulator to selectively flow to an assist motor.

Abstract: A flow control valve includes a valve body having an inner circumferential surface defining a longitudinal bore to which first and second fluid passages are connected. A spool is slidably inserted into the bore to allow a flow of fluid from the first to second fluid passage. A valve regulates a flow rate of fluid flowing through the first fluid passage. A first seat surface is defined between an area in which the first fluid passage is connected to the bore and an area in which the second fluid passage is connected to the bore. When the flow of fluid from the first to second fluid passage is initiated, an area of a gap between the first seat surface and the spool on a plane taken in a transverse direction is 5%˜50%, preferably 10%˜20% of an area of an opening defined by the first seat surface.