Abstract: A steering column assembly includes a lower jacket. The steering column assembly also includes an upper jacket in telescoping engagement with the lower jacket. The steering column assembly further includes an energy absorbing strap assembly operatively coupled to the upper jacket. The energy absorbing strap assembly includes a strap having a stationary leg and a moveable leg, the moveable leg extending from a first strap end region to a curved portion, the stationary leg extending from the curved portion to a second strap end region, wherein the second strap end region forms a U-shape defined by a radially outer segment, a radially inner segment and a connecting segment to join the radially outer segment and the radially inner segment. The energy absorbing strap assembly also includes a pin extending through the radially inner segment of the stationary leg and the moveable leg.

Abstract: A system and method of mu estimation may include the steps of collecting vehicle travel data on a road surface via a plurality of a sensors including at least one of an accelerometer or microphone; collecting external source data over a network; and aggregating the vehicle travel data and external source data to form an aggregated data set. The method may include performing feature extraction processing of the aggregated data set to transform the aggregated data set and into a processed aggregated data set; communicating the processed aggregated data set to a machine learning model; and generating at least one of an estimated mu value of the road surface or road surface classification via the machine learning model.

Abstract: A steering column assembly includes a jacket extending longitudinally about a jacket axis, the jacket defining an opening extending radially completely through the jacket. The steering column assembly also includes an end stop assembly disposed in the opening and protruding radially inwardly. The steering column assembly further includes a steering shaft, at least a portion of the steering shaft disposed within the jacket and extending longitudinally about the jacket axis. The steering column assembly yet further includes a stop ring mounted to the steering shaft, the stop ring positioned to contact the end stop assembly at an end of rotational travel position of the steering shaft.

Abstract: An electric motor assembly comprising a stator having a plurality of stator lamination sheets. Each of the stator lamination sheets includes an annular body and a plurality of stator teeth extending radially inwardly from the annular body to an opening. A rotor is located in the opening. Each of the stator teeth defining a pocket with a dampening element located in the pocket. The dampening element comprises a material that is viscoelastic. The pocket and dampening element are located in a location of the stator tooth that has less magnetic flux than an adjacent area of the stator tooth.

Abstract: A method to determine, in real time, a use-life of a steering system includes tracking an attribute signal associated with the steering system. The method further includes, based on a determination that the attribute signal rises above an upper threshold and subsequently falls below a lower threshold, selecting a subset of categories based on a frequency content of the attribute signal. The method further includes selecting a category from the subset of categories based on a peak load occurring in sequence to the attribute signal via a secondary attribute signal. The method further includes incrementing a counter for the selected category. The method further includes computing the use-life based on a ratio of the counter for the selected category and a predetermined count for said selected category.

Abstract: A method for estimating torsion bar torque includes receiving, from a first sensor, a handwheel position value indicating a position of a handwheel of a steering system and receiving, from a second sensor, a motor position value indicating a position of a motor of the steering system. The method also includes estimating a torsion bar torque value using the handwheel position value and the motor position value.

Abstract: A number of illustrative variations may include a method of communication between a driver and an autonomous steering system.

Abstract: The present disclosure related to a travel stop assembly for preventing rotation, and undesired locking, of a shaft. The travel stop assembly may comprise a shaft that extends along an axis and is rotatable about the axis. A lead screw may extend along the axis and be operatively engaged, and rotatable, with the shaft about the axis. A nut may be in threaded engagement with the lead screw and axially movable along a length of the lead screw upon rotation of the lead screw. At least one stop pin may operatively engaged the lead screw and the at least one stop pin may extend from the lead screw perpendicularly relative to the axis. The stop pin may be positioned on the lead screw to stop rotation of the lead screw and the stop pin may prevent locking of the nut to the lead screw.

Abstract: A steering column assembly includes an upper jacket. The steering column assembly also includes a lower jacket that the upper jacket is telescopingly coupled to. The steering column assembly further includes an energy absorbing strap operatively coupled to the upper jacket and the lower jacket, the energy absorbing strap having a first leg, a second leg and a U-shaped portion connecting the first leg and the second leg. The steering column assembly yet further includes a pin located within a slot defined by the first leg and the second leg of the energy absorbing strap.

Abstract: A locking mechanism for a telescoping steering column includes an energy absorption strap having a plurality of teeth disposed therealong. Also included is a clamp bolt rotatably driven by an adjustment lever. Further included is an actuator body coupled to the clamp bolt and rotated therewith. Yet further included is a first lock cam coupled to the actuator body and engageable with the teeth of the energy absorption strap to lock the telescoping steering column in a first direction. Also included is a second lock cam coupled to the actuator body and engageable with the teeth of the energy absorption strap to lock the telescoping steering column in a second direction different than the first direction.

Abstract: A steering column assembly includes a jacket extending along an axis and including a pair of jacket mounting plates on opposite sides of the axis. The steering column assembly also includes a mounting bracket including a pair of mounting bracket plates spaced by a bridge, wherein each of the mounting bracket plates is operably connected to a jacket mounting plate. The steering column assembly further includes at least one of the mounting bracket plates including a mating aperture defined by a pivot portion that is circular and an insertion slot extending outwardly from the pivot portion. The steering column assembly yet further includes at least one of the jacket mounting plates including a mating projection that includes at least one tab interfacing with opposite sides of the pivot portion. The insertion slot is sized to allow the at least one tab to be inserted therein during assembly.

Abstract: A method of controlling operation of an electric machine includes: determining a voltage-based torque limit based on a voltage constraint of a direct current (DC) bus supplying power to an inverter for powering the electric machine; determining a motor current-based torque limit based on a motor current limit; determining a final torque limit based on the voltage-based torque limit and the motor current-based torque limit; determining a limited command torque based on a torque command and the final torque limit; determining an initial current command corresponding to the inverter satisfying a regenerative current limit of the DC bus; and calculating a final current command based on, at least, the limited command torque and the initial current command. The method includes the final current command exceeding the initial current command to cause the electric machine to produce a torque corresponding to the limited torque command.

Abstract: A locking mechanism for an axially adjustable steering column includes a lock cam including a cam portion and a hub portion, wherein the cam portion and the hub portion are independent, separately formed components. The locking mechanism also includes a pin extending through the cam portion to permit the cam portion to pivot. The locking mechanism further includes a toothed portion formed on the cam portion for pivoting into engagement with teeth associated with the axially adjustable steering column in a locked position and out of engagement with the teeth in an unlocked position. The locking mechanism yet further includes an interface surface on the hub portion that includes at least one angled surface that interfaces with an adjustable lever and biases the cam portion from the locked position to the unlocked position.

Abstract: A number of illustrative variations may include a method or product for sensing driver intervention in an autonomous steering system.

Abstract: A motion control assembly for a steering column assembly includes a rake bracket having a first leg and a second leg. Also included is a clamping mechanism intersecting the upper jacket and positioned on the first leg of the rake bracket, the on-center, single-sided clamping mechanism moveable between a clamped condition and an unclamped condition, the clamped condition securing a lower jacket against telescoping movement relative to an upper jacket. Further included is a mechanical fastener extending through the second leg of the rake bracket and at least partially through the lower jacket and operatively coupled to the lower jacket.

Abstract: Embodiments for assisting steering of a vehicle responsive to detecting an object in a proximity of a vehicle are described. Embodiments described include: receiving an image of a lane indicator corresponding to a lane of travel of the vehicle from an image capturing device; determining, based on the image, reference values corresponding to a position of the lane indicator relative to the vehicle; associating each of the reference values to values used to locate a point within a reference frame related to a direction the vehicle is traveling; receiving position information of an object in an environment external to the vehicle from a radar sensor; determining, based on the values and the position information, an assigned lane of the object; detecting an impending change of the lane of travel of the vehicle to the assigned lane of the object; generating a steering control value based on the impending change.

Abstract: A friction plate for a vehicle steering system is provided. The friction plate includes a plate body defining a slot for receiving a rake bolt therethrough, the plate body having a planar side. The friction plate also includes a plurality of protrusions extending from the plate body to define a non-planar region of the friction plate.

Abstract: A hand-wheel actuator for preventing over rotation of a hand-wheel shaft. The hand-wheel actuator comprises a housing that defines an opening aligned about an axis. The hand-wheel shaft extends along and is rotatable about the axis. A drive gear is rotationally coupled to the hand-wheel shaft, wherein the drive gear is at least partially disposed in the opening and includes a drive gear tooth. A stop gear is coupled to the housing and includes a plurality of stop gear teeth for engagement with the drive gear tooth and prevents rotation of the drive gear over a predetermined threshold.

Abstract: A control system for a steering wheel includes a steering wheel switchable between a rotational condition and a non-rotational condition. The control system also includes a steering gear operatively coupled to a plurality of road wheels of a vehicle, the steering wheel and the steering gear electrically coupled to each other. The control system further includes a controller in operative communication with the steering wheel and the steering gear, the controller configured to control the steering gear independent of the steering wheel when the vehicle is in an autonomous vehicle driving condition, the steering wheel being in a retracted position during the autonomous vehicle driving condition.

Abstract: Technical solutions are described for controlling operation of an electric machine such as a permanent magnet synchronous motor (PMSM) drive or motor control system to protect against excessive machine current or voltage in a PMSM drive. Systems and methods employ a torque control algorithm for PMSMs that uses the constraints of both machine current and voltage capability in PMSM drives, and online torque command modification according to the maximum allowed torque under these machine current and voltage constraints.