In a steering device of the present invention, an electric motor rotates a steering shaft through a reduction mechanism, and the reduction mechanism and a torque sensor are accommodated in an integrally-structured housing. With this, the present invention can provide a steering device that is capable of suppressing increase in size of the electric motor.

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.

A brake system for providing tactile feedback in a vehicle steering system. The brake system includes an input shaft, and a rotor responsive to the shaft to rotate in response to input steering wheel inputs. A friction element imparts a base load to the rotor, and an electromagnetic coil imparts a variable load to the rotor. A housing of the brake system includes a fixed component and an intermediate component threaded together to set the base load. An adjustable component of the housing is threaded to the intermediate component to calibrate the variable load. The friction element is disposed between, and engages, both the rotor and the intermediate housing to impart the feedback loads.

The present invention reduces motor size in a steering device. To this end, this steering device (1) to be installed in a vehicle has: a power steering unit (12) positioned below the floor section (7) of the vehicle compartment (2); and a coaxial motor (20) which is provided directly above the power steering unit (12) and in a manner such that the output shaft thereof is coaxial with the input shaft of the power steering unit (12).

A method for operating a steering system for a motor vehicle, wherein the steering system has at least one steering lever and at least one electric motor for shifting the steering lever so as to cause a steering movement in the presence of a steering input, and wherein the electric motor is electrically connected to a current source via cabling. In doing so, it is provided that the electric motor is actuated and an electric current flowing between the current source and the electric motor is measured in order to check an electrical connection between the current source and the electric motor under the condition that there is no steering input present.

The present invention reduces motor size in a steering device. To this end, this steering device (1) to be installed in a vehicle has: a power steering unit (12) positioned below the floor section (7) of the vehicle compartment (2); and a coaxial motor (20) which is provided directly above the power steering unit (12) and in a manner such that the output shaft thereof is coaxial with the input shaft of the power steering unit (12).

In a steering device of the present invention, an electric motor rotates a steering shaft through a reduction mechanism, and the reduction mechanism and a torque sensor are accommodated in an integrally-structured housing. With this, the present invention can provide a steering device that is capable of suppressing increase in size of the electric motor.

A steering gear assembly, which utilizes a manually-drive first rotatable input shaft coupled with a rotatable valve member to control flow of hydraulic fluid to different downstream passages, includes a torsion tube and a transfer shaft extending within the interior of the torsion tube, with the transfer shaft being configured to receive rotational force from a second rotatable input shaft coupled to a motor or another mechanical torque-supplying element. The torsion tube applies a rotational restoring force to the rotatable valve member. A removable end cover for a steering gear assembly housing includes a rotary seal permitting rotation of the transfer shaft and/or second rotatable input shaft, with the first and second rotatable input shafts opposing one another. A remanufacturing kit for a steering gear assembly includes a torsion tube, a transfer shaft, and an end cover as mentioned. A method for remanufacturing a steering gear assembly is further provided.

A brake system for providing tactile feedback in a vehicle steering system. The brake system includes an input shaft, and a rotor responsive to the shaft to rotate in response to input steering wheel inputs. A friction element imparts a base load to the rotor, and an electromagnetic coil imparts a variable load to the rotor. A housing of the brake system includes a fixed component and an intermediate component threaded together to set the base load. An adjustable component of the housing is threaded to the intermediate component to calibrate the variable load. The friction element is disposed between, and engages, both the rotor and the intermediate housing to impart the feedback loads.

A method for operating a hydrostatic vehicle steering system includes rotationally operating an input shaft via a steering handle, rotary operating a steering dosing valve via an output shaft, the steering dosing valve used for hydraulic actuation of a steering cylinder interacting with steerable vehicle wheels, establishing a releasable rotary connection between the input shaft and the output shaft via a clutch, applying a predefinable steering torque to the output shaft via an actuating drive, automatically assuming a closed clutch position of the clutch under the effect of a restoring spring force in a first operating mode intended for manual steering operation, and bringing the clutch into an open clutch position counter to the effect of the restoring spring force via a controller in a second operating mode intended for autonomous steering operation.