Provided is an electric work vehicle having a simple configuration, yet allowing a hydraulic cylinder to function appropriately even in a low-temperature environment. An electric work vehicle includes a first hydraulic cylinder, a second hydraulic cylinder and a third hydraulic cylinder and includes also a hydraulic system for feeding work oil to these hydraulic cylinders and a traveling motor. The hydraulic system includes an oil heating circuit for heating the work oil using heat generated from the traveling motor.

Provided is an electric work vehicle having a simple configuration, yet allowing a hydraulic cylinder to function appropriately even in a low-temperature environment. An electric work vehicle includes a first hydraulic cylinder, a second hydraulic cylinder and a third hydraulic cylinder and includes also a hydraulic system for feeding work oil to these hydraulic cylinders and a traveling motor. The hydraulic system includes an oil heating circuit for heating the work oil using heat generated from the traveling motor.

A hydraulic block for redundancy of an electronic braking device may include: a block body having a motor mounting part to which a motor is coupled and a controller mounting part to which an ECU is coupled; hydraulic control ports formed on the block body, and connected to a first output line of a main braking device and a first hydraulic braking line, in order to perform hydraulic braking on ones of front wheels and rear wheels; drain ports formed on the block body, and connected to a second output line of the main braking device and a second hydraulic braking line, in order to reduce the pressure of the others; and a hydraulic circuit configured to form a flow path of operating fluid in the block body, and control the flow rates and pressures of operating fluids passing through the hydraulic control ports and the drain ports.

A housing block includes channels formed in an interior of the housing block with at least one of the channels having a slot or flat-channel geometry at least in portions. A method is disclosed for producing the housing block. A sand core is disclosed to be used with the method for producing the housing block.

A valve module (1) for mounting on a valve module carrier (2), the valve module (1) being of plate-shaped design, extending in a longitudinal direction (x), and being subdivided into a plurality of longitudinal sections adjoining one another in the longitudinal direction (x), the valve module having, as a first longitudinal section, a main valve section (8) with a first main valve (9), and, as a second longitudinal section adjoining the main valve section (8) in the longitudinal direction (x), a pilot section (10) with a pilot valve (11) for actuating the first main valve (9), the valve module (1) further having, as a third longitudinal section adjoining the pilot section (10) in the longitudinal direction (x), a pressure sensor section (12) with a pressure sensor (13) for detecting a fluid pressure of the valve module (1).

A lift device and a method of controlling the lift device are provided. The lift device has an electric motor drivingly coupled to a traction device, and a traction battery. A hydraulic circuit has a pump with a pump motor, and a valve. In response to a voltage being above a threshold voltage while the electric motor is outputting a braking torque and providing electrical power to the battery, flow of the pump is increased and the valve is controlled to reduce a size of the valve opening and increase pressure in the pressure galley thereby reducing electrical power to the traction battery. The flow of the pump and the valve position are therefore controlled in response to a braking power output being greater than a threshold to dissipate braking power output into the hydraulic circuit and charge the traction battery with the remaining braking power output.

A lift device and a method of controlling the lift device are provided. The lift device has an electric motor drivingly coupled to a traction device, and a traction battery. A hydraulic circuit has a pump with a pump motor, and a valve. In response to a voltage being above a threshold voltage while the electric motor is outputting a braking torque and providing electrical power to the battery, flow of the pump is increased and the valve is controlled to reduce a size of the valve opening and increase pressure in the pressure galley thereby reducing electrical power to the traction battery. The flow of the pump and the valve position are therefore controlled in response to a braking power output being greater than a threshold to dissipate braking power output into the hydraulic circuit and charge the traction battery with the remaining braking power output.

The present disclosure relates to a valve assembly including a valve moveable between an open position where hydraulic fluid flow is permitted between first and second ports of the valve and a closed position where hydraulic fluid flow is blocked between the first and second ports. A characteristic vibration is generated by turbulent hydraulic fluid flow within the valve when hydraulic fluid flow is first initiated between the first and second ports as the valve moves from the closed position toward the open position. The valve assembly also includes a controller for providing electrical current to control movement of the valve via a solenoid. The controller includes an accelerometer for sensing the characteristic vibration. The controller identifies an electrical current value of the electrical current at a time when the characteristic vibration is detected.

The present disclosure relates to a valve assembly including a valve moveable between an open position where hydraulic fluid flow is permitted between first and second ports of the valve and a closed position where hydraulic fluid flow is blocked between the first and second ports. A characteristic vibration is generated by turbulent hydraulic fluid flow within the valve when hydraulic fluid flow is first initiated between the first and second ports as the valve moves from the closed position toward the open position. The valve assembly also includes a controller for providing electrical current to control movement of the valve via a solenoid. The controller includes an accelerometer for sensing the characteristic vibration. The controller identifies an electrical current value of the electrical current at a time when the characteristic vibration is detected.

A rotary manifold includes a manifold assembly outer body assembly with a generally toroid outer body, a number of manifold assembly outer body assembly bearing assemblies, a number of seals, and a number of fluid couplings. The manifold assembly outer body assembly body defines a number of radial passages. A generally toroid manifold assembly inner body defines a number of right angle passages. The manifold assembly inner body is rotatably disposed within the manifold assembly outer body assembly body. Each manifold assembly inner body passage inlet is discontinuously in fluid communication with the manifold assembly outer body assembly body passage outlets. Each manifold assembly inner body passage outlet is discontinuously in fluid communication with the process shaft assembly body passages inlets.