An electronic control device includes a plurality of control circuit units, a signal line, and a sneak-in suppression circuit. The plurality of control circuit units are connected to separate grounds, respectively. The signal line connects a first control circuit unit and a second control circuit unit. When a system is defined as a combination of a component and a ground corresponding to a control circuit unit, the sneak-in suppression circuit suppresses a sneak-in of electric power from the ground of one system (i.e., a subject system) to the other system connected by the signal line for preventing a cascading failure.

A motor control system shorts motor windings of a motor by using junction gate field-effect transistors (JFETs) controlled bipolar junction transistors (BJTs), solid state relays (SSRs) controlled BJTs, and depletion mode metal-oxide-semiconductor field-effect transistors (MOSFETs) so that the motor generates braking torque when all or some electric control units of the motor are disabled or failed. The motor control system comprises: a motor comprising a plurality of motor phase terminals; a plurality of electric control units electrically connected with the motor and configured to control the motor, wherein the electric control units are configured to output control signals, respectively; and a shorting circuit connected to between the motor and the electric control units, the shorting circuit configured to short the motor phase terminals in response to receiving none of the control signals from the electric control units. The shorting circuit is configured not to short the motor phase terminals when receiving at least one of the control signals from at least one of the electric control units.

A shaft coupling includes a first coupling member, a second coupling member, and a cushioning member. The first coupling member includes first protrusions. The second coupling member includes second protrusions. The cushioning member includes a plurality of radiating portions. When the first coupling member and the second coupling member are arranged coaxially and the first coupling member and the second coupling member are in an unloaded state, predetermined paired facing surfaces have a minimum clearance angle present on a radially outer side with respect to a center of the radiating portion in a radiating direction. The predetermined paired facing surfaces are at least one of first paired facing surfaces and second paired facing surfaces.

A system and a method for active steering control with automatic torque compensation are disclosed with a processor that generates a targeted torque signal after receiving a steering assistance signal generated by an active driver assistance device, overlays the targeted torque signal on a driver's torque signal after receiving the driver's torque signal sensed by a torque sensor to generate a steering torque signal, and performs an assistance logic algorithm according to the steering torque signal. As the assistance logic algorithm is performed based on both the steering assistance signal and the driver's torque signal, the steering assistance effect provided by the system and the method will not resist against the way of driver's steering, allowing the driver to easily and stably control the vehicle.

In an exemplary embodiment, a test system is provided for testing a power steering system for a vehicle, the test system including a motor, one or more sensors, and a processor. The one or more sensors are configured to obtain sensor data pertaining to the motor. The processor is coupled to the one or more sensors and to the motor, and is configured to: determine, using the sensor data, a desired position of the motor for providing a desired amount of torque to the power steering system in order to reach one or more target behaviors: an inertia target, a spring target, a damper target, or a friction target for the power steering system; and provide instructions for the motor to move to the desired position for providing torque to the power steering system.

A vehicle steering system for use in turning steerable vehicle wheels includes a steering column and a steering gear operably connected with the steering column. The steering gear turns the steerable vehicle wheels upon rotation of the steering column. A first control assembly is connected to the steering column. The first control assembly has a first motor operably connected to the steering column for applying a torque to the steering column. A second control assembly is connected to the steering column. The second control assembly has a second motor operably connected to the steering column for applying a torque to the steering column. he second control assembly directly communicates with the first control assembly. A vehicle controller is configured to communicate with the first and second control assemblies to autonomously steer the vehicle.

A vehicle steering system for use in turning steerable vehicle wheels includes a steering column and a steering gear operably connected with the steering column. The steering gear turns the steerable vehicle wheels upon rotation of the steering column. A first control assembly is connected to the steering column. The first control assembly has a first motor operably connected to the steering column for applying a torque to the steering column. A second control assembly is connected to the steering column. The second control assembly has a second motor operably connected to the steering column for applying a torque to the steering column. he second control assembly directly communicates with the first control assembly. A vehicle controller is configured to communicate with the first and second control assemblies to autonomously steer the vehicle.

A drive unit for an electrical power-assisted steering system of a motor vehicle may include an electric motor with a stator housing to which a control housing, in which a control circuit board is arranged, is attached, and with a connecting unit, attached to the stator housing, which has electrical connecting elements and at least one positioning element. The connecting elements are electrically connected to the electric motor and to the control circuit board. The positioning element interacts with the control circuit board for the purpose of relative positioning. To enable simpler and more secure mounting, the positioning element interacts with the control housing for the purpose of relative positioning.

A steering control device has an electromagnetic clutch built into an electric motor. The electromagnetic clutch is provided with: an armature connected to a first closing member via a guide member, a coil holding part, and a bolt; a clutch plate connected to a rotor via a clutch plate attachment member, a key, and a motor shaft; and an excitation coil held by the coil holding part. The armature is fastened with the clutch plate when not attracted to the excitation coil during a power supply failure of the electric motor, and regulates relative rotation of the rotor with respect to a motor housing. Steering of a rack bar is thereby restricted at an optional steering position via the motor shaft, a worm shaft, and a steering shaft.

A steering system for a vehicle includes a transmission cover on a steering gear housing. The cover is arranged adjacent to a bearing part. The side surface of the bearing part facing the transmission cover forms a support surface for the transmission cover.