The power steering device is configured to: apply a required assist force only from a first electric motor until a predetermined period elapses, which is a period from a time point at which a driver starts steering to a time point at which a second-electric-motor drive start condition, which is a condition for starting drive of a second electric motor, is satisfied; when the predetermined period has elapsed, apply the required assist force from the first electric motor and a hydraulic actuator; and adjust an assist force by the first electric motor so that the assist force by the first electric motor is a value obtained by subtracting an assist force by the hydraulic actuator from the required assist force. As a result, the device can be downsized, and a sufficient required assist force can be generated from an initial stage of the steering.

A power steering system for a motorcycle, such as a motorcycle trike. The power steering system includes a piston having a piston rod disposed within a cylinder. A distal end of the piston rod is pivotably coupled to a fork tube of a motorcycle fork. A power source drives the piston rod away from the cylinder and retracts the piston rod within the cylinder. A control switch controls the piston between a neutral position, a first turn position, and a second turn position. The neutral position includes the piston rod partially extended from the cylinder. The first turn position includes the piston rod extending further from the cylinder than the neutral position. The second turn position includes the piston rod retracted further within the cylinder than the neutral position.

A power steering electrohydraulic system is provided for an electric vehicle, including: at least one reservoir of hydraulic fluid; and at least one hydraulic actuator for actuating a steering rack shaft of the vehicle; at least two electric motor pump units in parallel for supplying the actuator with hydraulic fluid from the reservoir and adjusting the flow rate of the hydraulic fluid supplied to the actuator, and each electric motor pump unit is a motor pump unit operating at a voltage of 24V. A vehicle equipped with such a system is also provided.

A motor includes a shaft to rotate about a central axis extending in a vertical direction, a metal heat sink including a through-hole through which the shaft extends, a substrate disposed at an upper side of the heat sink through a gap, a sensor magnet fixed to an upper end of the shaft, a rotation sensor located at an upper side of the sensor magnet, and a heat dissipating material located in a gap between the substrate and the heat sink. The heat sink includes a heat sink main body portion and a wall portion located between the substrate and the heat sink main body portion and between the heat dissipating material and the through-hole when viewed from the vertical direction.

A method (300) and control arrangement (210) for controlling a vehicle (100) to freewheel with engine off. The vehicle (100) has an engine (260) for propelling the vehicle (100) and a hydraulic power steering system (400). The hydraulic power steering system (400) comprises a primary power steering pump (270a) arranged to be driven by the engine (260) and a secondary power steering pump (270b). The method (300) includes: determining (301) when to start freewheeling the vehicle (100) with its engine off; and prior to starting the freewheeling of the vehicle (100) with engine off, determining (302) to start the secondary power steering pump (270b).

A motor oil pump assembly includes: an oil pump component is supported on an end cover of a motor component, and an upper end cover of the oil pump component has an end cover cavity that runs through the upper end cover and in communication with a high-pressure cavity of the oil pump component; an inner sound insulation enclosure encloses the oil pump component and is in communication with a low-pressure cavity of 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 includes a piston and an elastic member, the piston fits in with the end cover cavity to isolate the high-pressure cavity from the inner sound insulation cavity, and the elastic member is elastically sandwiched between the piston and the inner sound insulation enclosure.

A motor oil pump assembly includes: an inner sound insulation enclosure encloses an 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, the inner sound insulation cavity is in communication with a low-pressure cavity of the oil pump component, and the inner sound insulation enclosure is provided with a sound insulation enclosure cavity; and a pre-tightening buffering component, where the pre-tightening buffering component includes a piston and an elastic member, the piston fits in with the sound insulation enclosure cavity, the piston and an upper end cover of the oil pump component are integrally formed, and the elastic member is elastically sandwiched between a top wall of the sound insulation enclosure cavity and the piston, where the sound insulation enclosure cavity is in communication with a high-pressure cavity of the oil pump component.

The present disclosure relates to a steering system for a vehicle, and a steering system according to an embodiment of the present disclosure includes a motor configured to assist a steering force by rotating a steering shaft, a first bevel gear coupled to a motor shaft of the motor, a first lock nut configured to fix the first bevel gear to the motor shaft, a second bevel gear configured to engage with the first bevel gear, a housing coupled to the motor and configured to accommodate the first bevel gear and the second bevel gear, the housing having a motor shaft support configured to support an end of the motor shaft, and a first bearing interposed between the motor shaft and the motor shaft support.

A steering system for a vehicle, in particular a utility vehicle, has at least one steering transmission, in particular a ball nut hydraulic steering transmission; at least one steering mechanism for steering at least one first vehicle wheel and for steering at least one second vehicle wheel, wherein the steering transmission is coupled to the steering mechanism; at least one hydraulic pump for supplying the steering transmission with hydraulic fluid; and at least one drive motor which is provided independently and/or separately from the traction drive of the vehicle and which is coupled to the hydraulic pump in order to drive same. In the assembled state, the steering transmission, the hydraulic pump, and the drive motor are designed as a unit.

A vehicle-mounted apparatus includes: first and second voltage conversion circuits configured to convert voltages of electric powers supplied from first and second electric power supply circuits, to first and second predetermined voltages; first and second control circuits configured to be operated by the electric powers of the first and second predetermined voltages supplied from the first and second voltage conversion circuits, and to output first and second actuator command signals; first and second actuators configured to be actuated based on the first and second actuator command signals.