A steering seal diagnostic system includes a steering linkage that is operatively connectable to a pair of road wheels. The steering seal diagnostic system also includes a sealed compartment containing at least a portion of the steering linkage. The steering seal diagnostic system further includes a pressure sensor positioned to detect an internal pressure within the sealed compartment over a range of travel of the steering linkage, wherein a pressure change lower than a pressure change threshold indicates a leak condition of the sealed compartment.

The present embodiments relate to a steering assist device and method, and a steering system. The steering assist device comprises: first and second input-side steering control modules for controlling an input-side steering motor so that an input-side instrument connected to a steering wheel is assisted; and first and second output-side steering control modules for controlling an output-side steering motor so that an output-side instrument mechanically separated from the input-side instrument and connected to a wheel is assisted, wherein the first and second input-side steering control modules and the first and second output-side steering control modules arbitrate a role assignment and can control a corresponding steering motor from among the input-side steering motor and the output-side steering motor according to the role assignment arbitration result.

The present embodiments relate to a steering assist device and method, and a steering system. The steering assist device comprises: first and second input-side steering control modules for controlling an input-side steering motor so that an input-side instrument connected to a steering wheel is assisted; and first and second output-side steering control modules for controlling an output-side steering motor so that an output-side instrument mechanically separated from the input-side instrument and connected to a wheel is assisted, wherein the first and second input-side steering control modules and the first and second output-side steering control modules arbitrate a role assignment and can control a corresponding steering motor from among the input-side steering motor and the output-side steering motor according to the role assignment arbitration result.

An electric power steering device 100 includes: an electric motor 110 configured to apply a driving force to steer a wheel in response to operation of a steering wheel; and a control device 10 configured to perform control of drive of the electric motor by estimating a degree of sloping in a transverse direction of a roadway on which a vehicle travels, determining, based on the estimated degree of sloping, a correction current for correcting a target current required for the electric motor to generate the driving force, and correcting the target current with the correction current.

An electric power steering device 100 includes: an electric motor 110 configured to apply a driving force to steer a wheel in response to operation of a steering wheel; and a control device 10 configured to perform control of drive of the electric motor by estimating a degree of sloping in a transverse direction of a roadway on which a vehicle travels, determining, based on the estimated degree of sloping, a correction current for correcting a target current required for the electric motor to generate the driving force, and correcting the target current with the correction current.

A vehicle power steering assembly has a pinion housing comprised of first, second, and third housings. The first housing is a drawn tube formed from a first material. The second housing is a casting formed from a second material. The third housing is a stamping formed from a third material. The second housing is press fit into the first housing. The third housing is press fit and welded to the first housing. The second material has a lesser unit weight than each of the first and third materials. The first, second, and third housings together form the pinion housing.

A vehicle power steering assembly has a pinion housing comprised of first, second, and third housings. The first housing is a drawn tube formed from a first material. The second housing is a casting formed from a second material. The third housing is a stamping formed from a third material. The second housing is press fit into the first housing. The third housing is press fit and welded to the first housing. The second material has a lesser unit weight than each of the first and third materials. The first, second, and third housings together form the pinion housing.

A rack assembly for a rack and pinion gear system may comprise: a rack housing; and a rack disposed within the rack housing, the rack and the rack housing at least partially defining a first hydraulic chamber disposed between a first side of the rack and the rack housing, a second hydraulic chamber disposed between a second side of the rack and the rack housing, a third hydraulic chamber disposed within the rack proximal the first hydraulic chamber, and a fourth hydraulic chamber disposed within the rack proximal the second hydraulic chamber.

A rack assembly for a rack and pinion gear system may comprise: a rack housing; and a rack disposed within the rack housing, the rack and the rack housing at least partially defining a first hydraulic chamber disposed between a first side of the rack and the rack housing, a second hydraulic chamber disposed between a second side of the rack and the rack housing, a third hydraulic chamber disposed within the rack proximal the first hydraulic chamber, and a fourth hydraulic chamber disposed within the rack proximal the second hydraulic chamber.

A rack and pinion steering system includes a housing, a rack, a pinion gear, and a radially preloaded rack bearing. The rack is supported by the housing, and the pinion gear is meshed to the rack. The radially preloaded rack bearing is supported and preloaded to the housing and is preloaded to the rack.