Provided is a power steering device capable of causing control that uses a pump device and control that uses an electric motor on an input shaft to cooperate with each other. The power steering device includes a power cylinder including a pair of hydraulic chambers partitioned by a piston and configured to generate a steering assist force for a steered wheel, a pump device configured to be driven through control by a first electric motor and configured to discharge working fluid, a rotary valve configured to selectively supply the working fluid supplied from the pump device to the pair of hydraulic chambers in accordance with relative rotation between the input shaft and the output shaft, a second electric motor provided so as to surround at least a part in an axial direction of the input shaft and configured to control the rotation of the input shaft, and a second electric motor control part installed in a control device and configured to output a control signal for controlling driving of the second electric motor based on a revolution number signal of the first electric motor.

A motor control device includes a frame including a metal material, a substrate disposed on an upper side of the frame with a gap between the substrate and the upper side of the frame member, the substrate including a hole penetrating an upper surface and a lower surface, a wiring that is inserted into the hole from a side of the upper surface of the substrate, and a tip portion connected to the substrate, and an insulating spacer interposed between the frame and the substrate. The spacer includes a side wall portion that surrounds the tip portion of the wiring in a plan view.

A motor oil pump assembly includes: a motor component; an oil pump component, where the oil pump component is supported on an end cover of the motor component; an inner sound insulation enclosure, where the inner sound insulation enclosure encloses the oil pump component, and the inner sound insulation enclosure and the oil pump component define an inner sound insulation cavity filled with low-pressure oil; and a pre-tightening buffering component, where the pre-tightening buffering component is pressed between an upper end cover of the oil pump component and the inner sound insulation enclosure, and the pre-tightening buffering component is in communication with a high-pressure cavity of the oil pump component.

A fluid container, in particular a hydraulic tank for a motor pump unit, has an equalizing chamber that is adapted to contain a supply of fluid and air, and at least one return chamber into which a return flow of the fluid can flow, a fluid communication being provided between the return chamber and the equalizing chamber. The return chamber is provided with a suction port for a pump, in particular of the motor pump unit.

A valve assembly for use with a main pump, a reserve pump, a steering valve with a second load signaling connector, and a first pressure switch includes an adjustable first orifice and a flow control valve. The valve assembly further includes a fluid flow path running from a first high pressure connector via the first orifice, further via a control point, further via the flow control valve, to a first low pressure connector. The first orifice is loaded in the opening direction by the pressure at the first high pressure connector, and the first orifice is loaded in the closing direction by a spring and by the pressure at the first load signaling connector. The control point is connected permanently to the first measuring connector.

A hydraulic unit for supplying pressure to a hydraulic steering system is provided having at least two hydraulic cylinders and at least one hydraulic pump (9, 10, 32, 33). It is essential that the hydraulic cylinders are of interacting configuration, by an annular space (6a, 6a, 28a, 28b) of the first hydraulic cylinder being connected via at least one hydraulic line to an annular space (6a, 6a, 28a, 28b) of the second hydraulic cylinder, and a piston space (5a, 5b, 29a, 29b) of the first hydraulic cylinder being connected via at least one hydraulic line to a piston space (5a, 5b, 29a, 29b) of the second hydraulic cylinder, and a hydraulic pump (9, 10, 32, 33) being arranged at least in a hydraulic line (7, 8, 30, 31) between the two annular spaces (6a, 6a, 28a, 28b) or in a hydraulic line (7, 8, 30, 31) between the two piston spaces (5a, 5b, 29a, 29b). Furthermore, the invention relates to methods for operating a hydraulic unit for supplying pressure to a hydraulic steering system, and to a steering system.

A method is provided for actuating an electric motor of a pump device of a steering device, having a step of reading the current rotational angle of the electric motor of the pump device and a correction value which represents a relationship between an output pressure of the pump device and/or the rotational speed of the electric motor of the pump device on the basis of the rotational angle of the electric motor, and a step of outputting an actuation signal to the electric motor using the correction value.

A power steering system for a vehicle, the power steering system comprising a power steering pump, an electrical machine unit, a clutch arrangement and a power steering control system configured to control the power steering system, wherein the electrical machine unit is configured to drive the power steering pump and to be operatively connected to and powered by an energy storage of the vehicle, and the power steering pump is configured to be connected to a torque output source arranged downstream of a transmission system of the vehicle, the power steering pump being configured to be driven by means of torque provided by the torque output source.

A pump apparatus for an electrohydraulic power steering mechanism for a vehicle includes a hydraulic pump, a working line, a pressure generator, a first control line, a preliminary pressure line, a compensation tank, a shut-off valve having a control inlet, and a second control line. The hydraulic pump is designed to pump a hydraulic oil out of a pump chamber to a pump outlet of the hydraulic pump. The pressure generator has a pressure generation inlet and a pressure generation outlet, and the pressure generator is designed to generate, using an inlet pressure present at the pressure generation inlet, an outlet pressure which can be provided at the pressure generation outlet and is lower than the inlet pressure. As a result, a preliminary pressure can be generated in the pump chamber.

Provided herein is an auxiliary hybrid system (AHS) that may be configured to provide electrical propulsion to an e.g., internal combustion-powered vehicle through the use of a battery and electric motor. Alternatively, the AHS may be configured to increase range to electric vehicles through the use of an internal combustion-powered generator. In either embodiment, the AHS is added to a vehicle without altering the operation of the vehicles standard drivetrain, allowing the vehicle to operate conventionally when the AHS is not engaged. The AHS is compatible with a wide range of vehicles with a minimum of vehicle-specific parts.