Volvo Construction Equipment

Provided herein is a computer system (180) for reducing vertical oscillations of a bucket (120) and/or body (110) of a piece of heavy machinery such as a wheel loader (100). The computer system includes processing circuitry configured to obtain an indication of a first vertical speed (vbucket) of the bucket; obtain an indication of a second vertical speed (vbody) of the body or a relative vertical speed between the bucket and the body, and control a force applied by at least one actuator (140) configured to lift/lower the bucket, such that the applied force is proportional to a weighted sum of the first vertical speed and the second vertical speed. Provided is also a corresponding method, piece of heavy machinery, computer program and computer program product.

A method and a computer system comprising processing circuitry configured to: monitor a first property indicative of an instantaneous normal force between each one of a plurality of driven wheels (18, 19, 28, 29, 30, 31) of a vehicle (10), such as an articulated hauler, and a ground surface (2) below the driven wheels, detect that the monitored first property indicates a decrease in the instantaneous normal force between a first subset of the driven wheels and the ground surface, and in response thereto control an electric powertrain arrangement of the vehicle to reduce a torque delivered to the first subset of driven wheels, and to optionally increase a torque delivered to a second subset of the driven wheels for which the monitored first property is not indicative of the decrease in the instantaneous normal force.

The disclosed technology is a construction machine (1) able to translate according to a longitudinal axis (X1) with respect to a reference plane (P1), comprising a base (9), an active member (11) and a first rotary actuator (110) having two ends, a first end being rigidly fixed to the base (9) and a second end being rigidly fixed to the active member (11), the second end being mobile in rotation about a first rotation axis parallel to the longitudinal axis (X1) with respect to the first end, wherein the first rotary actuator is an electrical rotary actuator comprising an electric motor intended to be supplied in electrical power and deliver a rotational force to the active member (11) in a first rotational direction and a second, opposite the first, rotational direction, about the first rotation axis depending on a command provided by a control unit to the first rotary actuator.

According to one embodiment, there is disclosed a method comprising a receiving unit obtaining a plurality of video information corresponding to a plurality of directions and provided from a plurality of video devices; the receiving unit obtaining a user input for controlling a vehicle; a processor determining a direction priority for at least one of the plurality of directions based on the user input; the processor determining a video priority for at least one of the plurality of video information based on the direction priority; the processor determining a quality level for the plurality of video information based on the video priority; and the processor providing all or part of the plurality of video information according to the quality level, and a device and a recording medium for implementing the method.

An aspect of the present disclosure is a real-time weight compensation method for automatic swing control of a construction machine, wherein the construction machine comprises a lower traveling body and an upper structure swingably supported on the lower traveling body, the upper structure including an upper rotating body, a boom connected to the upper rotating body, an arm connected to the boom, and an attachment connected to the arm, the method comprising: measuring a current arm joint angle (θ<c>) using one or more detection means, measuring a current boom cylinder pressure (P<c>) at the current arm joint angle (θ<c>) using a pressure measuring means, calculating a pressure difference (ΔP) between the measured current boom cylinder pressure (P<c>) at the current arm joint angle (θ<c>) and a preset reference boom cylinder pressure (P<r>) at the corresponding arm joint angle (θ<c>), converting the calculated pressure difference (ΔP) into a preset reference additional weight (W<r>) at the corresponding pressure difference (ΔP), and updating a swing moment or inertia of the upper structure in real time by reflecting the reference additional weight (W<r>).

A working machine (1) having a dump body (3) configured to carry material (50). The working machine comprises: an electric drive line (8) comprising an electric traction machine (10) powered by a battery pack (12) or a fuel cell (14); a fuel supply system (110) including a fuel tank (112) configured to store gaseous or liquid fuel, the fuel supply system being separate and independent of the electric drive line; a catalytic heater (120) configured to produce heated gases using the fuel from the fuel tank; a dump body heating system (130) configured to receive the heated gases from the catalytic heater to heat the dump body. The working machine (1) further comprises a control system (17) comprising processing circuitry (18) configured to: in response to identifying a predefined condition, activate the catalytic heater by supplying fuel from the fuel tank.

A fuel cell system (120) for a vehicle (1) equipped with a regenerative braking system (5), the fuel cell system comprising: an electric traction machine (10); a fuel cell (14) configured to power the electric traction machine, the power output from the fuel cell being controlled by a throttle (15) introducing a lag time between operation of the throttle and the power output of the fuel cell; an energy storage system (12) comprising a first energy storage device (12a) being a first battery pack or a first super capacitor, and a second energy storage device (12b) being a second battery pack or a second super capacitor; a control and relay unit (16) electrically connecting the fuel cell, the energy storage system and the electric traction machine to each other; a control system (17) comprising a processing circuitry (18) configured to: in response to identifying an operation of the throttle indicating an intended reduction in the power output from the fuel cell, control the control and relay unit to direct electricity from the fuel cell to the first energy storage device at least during a time corresponding to said lag time, and control the control and relay unit to direct electricity received from the regenerative braking system to the second energy storage device.

Disclosed are a hybrid power system, a control method, a computer system, a program product, and a vehicle. The hybrid power system includes: an engine (1), a motor generator (2), a gearbox (3), a variable displacement hydraulic pump (4), and a battery (5) electrically connected to the motor generator (2), where the gearbox (3) includes a first transmission shaft (6), a second transmission shaft (7), a first gear (8) disposed on the first transmission shaft (6), and a second gear (9) disposed on the second transmission shaft (7), where the first gear (8) is coupled to the second gear (9); a rotation shaft of the motor generator (2) is coupled to one end of the second transmission shaft (7); and the engine (1) is connected to the variable displacement hydraulic pump (4) via the first transmission shaft (6) through 1:1 transmission. The present disclosure can simplify the structure and control of the hybrid power system, improve fuel economy, and reduce costs.

A method for controlling vehicle power, a computer system, and a vehicle are disclosed. The vehicle includes a fuel cell, a power battery, a hydraulic system, an accessory system, and a visual sensor. The method is performed by a processing circuit of a computer system. The method includes obtaining an image of a construction earthwork by the visual sensor; identifying a type of the construction earthwork by an earthwork classification model based on the image of the construction earthwork; obtaining a power demand load spectrum of the vehicle within a first time duration; correcting the type of the construction earthwork based on the power demand load spectrum; inputting the power demand load spectrum and the corrected type of the construction earthwork into a pre-trained neural network prediction model, and predicting a power load spectrum of the vehicle within a second time duration by the neural network prediction model; and determining optimal power allocation between the fuel cell and the power battery based on the predicted power load spectrum, so as to minimize an operating cost objective function within the second time duration.

A working machine may comprise a tank; a working device including an actuator; an accumulator; a recovery path connecting the actuator and the accumulator; a return valve installed between the recovery path and the tank to control the flow rate of fluid discharged from the recovery path to the tank; a command generating device that generates a command; and a control unit that receives the command from the command generating device and controls the return valve so that the return valve has an opening amount corresponding to the command according to a preset relationship, thereby adjusting the operating speed of the actuator and the charging speed of the accumulator. The command generating device may be a first operator input device that receives a request from an operator for one of the operating speed of the actuator, the charging speed of the accumulator, and the opening amount of the return valve. As the requested operating speed input to the first operator input device becomes faster, the control unit may control the return valve to have a larger opening amount. The command generating device may be a sensor that detects the position of a predetermined portion of the working device. As the position of the predetermined portion of the working device detected by the sensor becomes lower, the control unit may control the return valve so that the return valve has a larger opening amount.