A device for determining a temperature of a semiconductor power switch with a built-in temperature-dependent gate resistor may include a non-inverting amplifier circuit comprising an operational amplifier and a feedback resistor. Inverting input of the operational amplifier may be connected to the semiconductor power switch such that a gain of the non-inverting amplifier circuit in a predefined frequency range of an input signal depends on the built-in temperature-dependent gate resistor and the feedback resistor and is a measure of the temperature of the semiconductor power switch. The feedback resistor may be disposed between a negative input and an output of the operational amplifier.

A parking assist system parks a vehicle at a target parking position by automatically steering an EPS. The parking assist system includes a acquiring unit configured to acquire the position of the vehicle, a position determining unit configured to determine the target parking position, a generating unit configured to generate a path from the position of the vehicle to the target parking position, a detecting unit configured to detect the temperature of the EPS, and a assist unit configured to automatically steer the vehicle so as to move along the path generated by the generating unit. The generating unit generates a path in which a degree of stationary steering by which the vehicle is steered in a state where the vehicle stops is small when the temperature of the EPS is high, compared with when the temperature of the EPS is low.

A torque compensation apparatus for an electric power steering system may include: a temperature sensor configured to sense the initial temperature around the electric power steering system when a vehicle is started; a motor position sensor configured to sense a motor angle of the electric power steering system; a timer configured to detect an operation time of the started vehicle; and a controller configured to calculate a compensation gain when the initial temperature corresponds to a preset low-temperature state, the compensation gain reflects the increasing ambient temperature, and is based on the motor angles accumulated during steering and the accumulative operation time detected through the timer after the start of the vehicle; and the controller outputs the compensation gain to compensate for a motor output torque of the electric power steering system.

The present disclosure relates to a steering assistance system, a steering control device, and a steering control method. Specifically, the steering control device according to the present invention calculates a target rack stroke on the basis of steering information input by a driver and calculates a target instruction current according to the target rack stroke, wherein different instruction currents are calculated depending on whether other steering control devices fail, and are applied to a steering motor according to predetermined application patterns.

Disclosed are a motor control apparatus and method in an electric power steering (EPS) system for a vehicle. The motor control apparatus of an EPS system for a vehicle includes a temperature sensing unit configured to sense a temperature of a motor controller for controlling the motor in the EPS system and an output control module configured to adjust a motor current, applied from a steering control module of the EPS system to the motor, based on the motor current and the temperature of the motor controller sensed by the temperature sensing unit.

A system includes a steering-system motor, a first electronic control unit (ECU) and a second ECU each electrically connected to the steering-system motor, a communication line directly communicatively connecting the first ECU and the second ECU, and a gateway module communicatively connecting the first ECU to a controller area network (CAN) bus and communicatively connecting the second ECU to the CAN bus. The first ECU is programmed to, upon detecting a fault, transmit a fault code to the second ECU via the communication line and via the gateway module. The second ECU is programmed to, upon detecting a fault, transmit a fault code to the first ECU via the communication line and via the gateway module.

A steer-by-wire steering system for a vehicle, including: an operating device including a steering operating member, a counterforce applying mechanism configured to apply, to the steering operating member, an operation counterforce by a counterforce motor, and an operating controller configured to control the operation counterforce; a steering device including a steering actuator configured to steer a wheel by a steering motor and a steering controller configured to control an amount of steering of the wheel by the steering actuator; and a communication line communicably connecting the operating controller and the steering controller, wherein the steering controller is configured to: determine a status code based on a status of the steering device; and transmit the status code to the operating controller via the communication line; and wherein the operating controller is configured to change a magnitude of the operation counterforce in accordance with the status code received by the operating controller.

Disclosed is an electric power steering system for a vehicle, the power steering system including: an electric motor configured to provide mechanical power to a steering mechanism of the vehicle for steering the vehicle; a housing in which the electric motor is disposed, wherein the housing comprises an inner housing in which the electric motor is disposed, and an outer housing disposed around the inner housing, and wherein an air flow path is defined within the housing, the air flow path being defined at least in part by a gap between the inner housing and the outer housing; and an air flow source arranged to generate an air flow along the air flow path to cool the electric motor, wherein the air flow source is independent from the electric motor.

The present disclosure is directed to a cooling system for a system, such as an electric power assisted steering (EPAS) system and the components of such system, such as a motor. The cooling system includes a temperature sensor coupled to an electric motor of the EPAS system, one or more fluid reservoirs, and a fluid transfer device coupled to the motor and to the first fluid reservoirs. The fluid transfer device extends along a length of the motor. The cooling system further includes a pump coupled to the fluid reservoir and the fluid transfer device, a control unit coupled to the sensor and the pump. The control unit is configured to activate the pump in response to temperature detected by the sensor being greater than or equal to a first threshold motor temperature. The pump transfers the fluid in the fluid reservoirs to the fluid transfer device for absorbing the heat of the motor. The fluid transfer device is configured to contain the transferred fluid.

A steering apparatus includes: a mechanism that turns a turning wheel; a first motor that generates a driving force that is given to the mechanism; and a control device. The control device includes: a first computation circuit that computes a first limiting value to which an electric current to be supplied to the first motor is limited in a particular situation; a determination circuit that determines whether the turning wheel is in touch with an obstacle; a second computation circuit that computes a second limiting value to which the electric current to be supplied to the first motor is limited when the determination circuit determines that the turning wheel is in touch with the obstacle; and a third computation circuit that computes the threshold to be used by the determination circuit, based on a smaller limiting value of the first limiting value and the second limiting value.