Disclosed herein is a system for recognizing a tilt angle through detection of torque variation in a vehicle. The system includes a steering unit including a steering wheel steered by a driver and a steering shaft connected to the steering wheel, a torque detection unit configured to detect a torque variation according to a change in tilt angle of the steering shaft, and a control unit configured to calculate a torque variation using pre-stored data for a joint angle of the steering shaft and a plane angle of the steering shaft according to the change in tilt angle of the steering shaft, and to derive data for a tilt angle of the steering shaft by matching the calculated torque variation with the torque variation detected by the torque detection unit.

An adjustable steering column assembly includes a support bracket, a jacket assembly, and a locking assembly. The support bracket is configured to connect to a vehicle. The jacket assembly is connected to the support bracket. The locking assembly is connected to and disposed between the support bracket and an adjustment lever. The locking assembly includes an inner cam connected to the support bracket and an outer cam rotatably connected to the inner cam and connected to the adjustment lever. The adjustment lever and the outer cam are movable between an unlock position and a lock position.

A steering column assembly includes a jacket assembly connected to a support bracket and a locking assembly. The locking assembly has a first cam member, a second cam member, and a lever. The first cam member is connected to the support bracket and has a first locking pattern. The second cam member has a second cam member body that extends between a second cam member body first end and a second cam member body second end. The second cam member body second end defines a second locking pattern configured to selectively engage the first locking pattern. The lever is disposed about the second cam member body.

A steering system includes a movable member and a tooth member. The movable member includes first tooth arrangements. The movable member is movable together with a column jacket in a tilt direction. The movable member is movable in a right-left direction. The tooth member is supported by a lateral plate of an upper bracket so that the tooth member is located between the movable member and the lateral plate in the right-left direction. The tooth member includes: second tooth arrangements engageable with the first tooth arrangements; and curved elastic portions supporting the second tooth arrangements, with the second tooth arrangements inclined toward the upper bracket such that the second tooth arrangements are away from the first tooth arrangements. When the elastic portions are sandwiched between the movable member and the lateral plate and elastically deformed, the second tooth arrangements come into engagement with the first tooth arrangements.

A steering system includes a movable member and a tooth member. The movable member includes first tooth arrangements. The movable member is movable together with a column jacket in a tilt direction. The movable member is movable in a right-left direction. The tooth member is supported by a lateral plate of an upper bracket so that the tooth member is located between the movable member and the lateral plate in the right-left direction. The tooth member includes: second tooth arrangements engageable with the first tooth arrangements; and curved elastic portions supporting the second tooth arrangements, with the second tooth arrangements inclined toward the upper bracket such that the second tooth arrangements are away from the first tooth arrangements. When the elastic portions are sandwiched between the movable member and the lateral plate and elastically deformed, the second tooth arrangements come into engagement with the first tooth arrangements.

In a steering device according to an aspect of the present disclosure, a holding portion of a driven cam that is held in a tilt guide hole includes a lock contact portion that faces one side in a bolt circumferential direction and comes into contact with an inner peripheral edge of the tilt guide hole in a locked state to restrict the driven cam from rotating toward the one side in the bolt circumferential direction with respect to a rear side plate portion and a release contact portion that faces the other side in the bolt circumferential direction and comes into contact with the inner peripheral edge of the tilt guide hole in an unlocked state to restrict the driven cam from rotating toward the other side in the bolt circumferential direction with respect to the rear side plate portion.

In a steering device according to an aspect of the present disclosure, a holding portion of a driven cam that is held in a tilt guide hole includes a lock contact portion that faces one side in a bolt circumferential direction and comes into contact with an inner peripheral edge of the tilt guide hole in a locked state to restrict the driven cam from rotating toward the one side in the bolt circumferential direction with respect to a rear side plate portion and a release contact portion that faces the other side in the bolt circumferential direction and comes into contact with the inner peripheral edge of the tilt guide hole in an unlocked state to restrict the driven cam from rotating toward the other side in the bolt circumferential direction with respect to the rear side plate portion.

In a steering device according to an aspect of the present disclosure, a driven cam includes a lock position restriction surface with which a cam portion of a drive cam engages in a locked state and a release position restriction surface that is provided to be separated front the lock position restriction surface in a bolt circumferential direction and that engages with the drive cam in the bolt circumferential direction in an unlocked state. The cam portion includes a sliding surface that faces the driven cam in the unlocked state and a flank surface that faces the release position restriction surface in the bolt circumferential direction. The angle of the flank surface with respect to the bolt circumferential direction is smaller than the angle of the release position restriction surface with respect to the bolt circumferential direction.

In a steering device according to an aspect of the present disclosure, a driven cam includes a lock position restriction surface with which a cam portion of a drive cam engages in a locked state and a release position restriction surface that is provided to be separated front the lock position restriction surface in a bolt circumferential direction and that engages with the drive cam in the bolt circumferential direction in an unlocked state. The cam portion includes a sliding surface that faces the driven cam in the unlocked state and a flank surface that faces the release position restriction surface in the bolt circumferential direction. The angle of the flank surface with respect to the bolt circumferential direction is smaller than the angle of the release position restriction surface with respect to the bolt circumferential direction.

A steering column may include a first adjustment drive for adjustments in a length adjustment direction and a second adjustment drive for adjustments in a height adjustment direction. The adjustment drives each have a drive motor. A joint control unit for the drive motors comprises three half bridges arranged in parallel and connected between two voltage potentials. Each half bridge has a high-side switch and a low-side switch connected in series via a connection point. The connection point of the first half bridge is electrically conductively connected to a first connection of a first drive motor. The connection point of a second half bridge is electrically conductively connected to a second connection of the first drive motor and to a first connection of the second drive motor. The connection point of a third half bridge is electrically conductively connected to a second connection of the second drive motor.