Abstract: A steering controller for an electric power steering device 110 includes a base signal computing part 51 for computing a base signal DT in accordance with at least the steering torque; a damper compensation signal computing part 52 for computing a damper compensation signal in accordance with an angular velocity of an electric motor 4 or a speed of steering wheel turn; and an inertia compensation signal computing part 53 for compensating inertia and viscosity in the steering unit. The electric motor is driven by a target signal IM1 obtained by compensating the base signal with a damper compensation signal and an inertia compensation signal, to provide a steering auxiliary force. The target signal of the auxiliary torque is compensated so that a difference between a reference self-aligning torque of front wheel in a front wheel steering vehicle and a self-aligning torque of front wheel in an all-wheel steering vehicle is provided to a driver as a responsive feeling from the steering torque.

Abstract: The main calculation section (37a) of a toe angle alteration control ECU (37) in a vehicle control system receives target toe angles ?TL and ?TR. from a steering control ECU (130) and controls a motor (31L) for changing the toe angles of a left rear wheel and a motor (31R) for changing the toe angle of a right rear wheel independently. Stroke sensors (38L, 38R) detect actual toe angles ?L and ?R and inputs to the judging portion (85) of actuations of the sub calculation section (37c). In accordance with a pre-stored judgment table (85a), the judging portion (85) of actuations calculates an allowable actuation range, which is a combination of the toe angles ?L and ?R of the left-and-right rear wheels depending on vehicle speed VS, and judges whether the actuation of the motor (31L, 31R) is suitable for the turning of a vehicle or not depending on whether the actual toe angles ?L and ?R. is within the allowable actuation range or not.

Abstract: A steering controller for an electric power steering device 110 includes a base signal computing part 51 for computing a base signal DT in accordance with at least the steering torque; a damper compensation signal computing part 52 for computing a damper compensation signal in accordance with an angular velocity of an electric motor 4 or a speed of steering wheel turn; and an inertia compensation signal computing part 53 for compensating inertia and viscosity in the steering unit. The electric motor is driven by a target signal IM1 obtained by compensating the base signal with a damper compensation signal and an inertia compensation signal, to provide a steering auxiliary force. The target signal of the auxiliary torque is compensated so that a difference between a reference self-aligning torque of front wheel in a front wheel steering vehicle and a self-aligning torque of front wheel in an all-wheel steering vehicle is provided to a driver as a responsive feeling from the steering torque.

Abstract: A steering controller for an electric power steering device 110 includes a base signal computing part 51 for computing a base signal DT in accordance with at least the steering torque; a damper compensation signal computing part 52 for computing a damper compensation signal in accordance with an angular velocity of an electric motor 4 or a speed of steering wheel turn; and an inertia compensation signal computing part 53 for compensating inertia and viscosity in the steering unit. The electric motor is driven by a target signal IM1 obtained by compensating the base signal with a damper compensation signal and an inertia compensation signal, to provide a steering auxiliary force. The target signal of the auxiliary torque is compensated so that a difference between a reference self-aligning torque of front wheel in a front wheel steering vehicle and a self-aligning torque of front wheel in an all-wheel steering vehicle is provided to a driver as a responsive feeling from the steering torque.

Abstract: A vehicle steering apparatus, which includes: a steering system connection member connecting a steering wheel and a tire; an electric generator installed in the steering system connection member so as to adjusting a steering force of the steering wheel; and a control unit for controlling a connection/disconnection of both terminals of an armature coil in the electric generator based on a vehicle speed.

Abstract: An alignment changing control device that includes: a motor drive section which adjusts electrical power supplied to a motor of the electric actuator according to an operation command and, when receiving an operation inhibiting signal, limits or stops supplying the electrical power to the motor; a motor temperature estimating section for calculating an estimated temperature of the motor from at least a current supplied to the motor, an outside air temperature and a vehicle speed, based on heat balance relationship; and a comparator which transmits the operation inhibiting signal to the motor drive section when the estimated temperature of the motor calculated by the motor temperature estimating section is higher than a predetermined temperature, which is equal to or lower than an operation allowable temperature of the motor.

Abstract: The main calculation section (37a) of a toe angle alteration control ECU (37) in a vehicle control system receives target toe angles ?TL and ?TR from a steering control ECU (130) and controls a motor (31L) for changing the toe angles of a left rear wheel and a motor (31R) for changing the toe angle of a right rear wheel independently. Stroke sensors (38L, 38R) detect actual toe angles ?L and ?R and inputs to the judging portion (85) of actuations of the sub calculation section (37c). In accordance with a pre-stored judgment table (85a), the judging portion (85) of actuations calculates an allowable actuation range, which is a combination of the toe angles ?L and ?R of the left-and-right rear wheels depending on vehicle speed VS, and judges whether the actuation of the motor (31L, 31R) is suitable for the turning of a vehicle or not depending on whether the actual toe angles ?L and ?R is within the allowable actuation range or not.

Abstract: An apparatus for steering a vehicle includes a hand steering device, a road wheel steering device, a steering motor and a connection device. The hand steering device is a device which a driver of the vehicle manipulates for steering road wheels. The road wheel steering device actuates the road wheels. The steering motor, which is attached to the road wheel steering device, produces an assist force for the road wheels. The connection device selectively connects and disconnects the hand steering device and the road wheel steering device. In the apparatus, a ratio of a displacement made by the hand steering device to a displacement generated by the road wheel steering device increases as a speed of the vehicle becomes greater while the vehicle is traveling in a predetermined range of speed, and a gradient of the ratio is adapted to be greater when the speed is lower.

Abstract: A vehicle steering apparatus, which includes: a steering system connection member connecting a steering wheel and a tire; an electric generator installed in the steering system connection member so as to adjusting a steering force of the steering wheel; and a control unit for controlling a connection/disconnection of both terminals of an armature coil in the electric generator based on a vehicle speed.

Abstract: A steering apparatus for a vehicle, includes: an operation unit; an input operation magnitude measuring unit; a turning actuator turning steerable wheels; a reaction force actuator; a turning actuator control unit; a reaction force actuator control unit; a planetary gear unit disposed between the operation unit and the turning actuator; a locking element fixing and releasing a component of the planetary gear unit; a locking element operation unit; a locking state detection unit; and a control unit executing at least one of the control operations for increasing magnitude of a control parameter for the turning actuator and for increasing magnitude of a control parameter for the reaction force actuator if it is determined by the locking state detection unit that the locking element is placed in a locked state even though the locking element operation unit is operated so as to place the locking element in the locked state from an unlocked state.

Abstract: A steering system includes a steering wheel, a steering angle sensor detecting a steering angle, a steering motor steering road-wheels, a reaction motor imparting a reaction force to the steering wheel, an ECU driving the steering motor with respect to a detected steering angle and a temperature detecting unit detecting temperatures of the steering motor, the reaction motor or a constituent member involved in the temperatures of the motors. When the temperature detected is larger than a predetermined value, the ECU performs such that a ratio of the rotating angle to the steering angle is made smaller than one that is to result when the temperature is equal to or smaller than the predetermined value, or a reaction force that is to be imparted to the steering wheel is made larger.

Abstract: A steering system for a vehicle, includes a control operated by a driver of the vehicle; a measuring device for measuring a quantity of operation of the control by the driver; a steering section including a steering actuator for steering wheels which are mechanically independent of the control; a section for setting a target steering angle in accordance with the quantity of operation measured by the measuring device; a reaction actuator for applying a steering reactive force to the control; a section for setting a virtual steering angle based on a virtual model which represents predetermined dynamic characteristics of the steering section; and a reaction control section for setting a target reactive force in accordance with a difference between the target steering angle and the virtual steering angle, and controlling the reaction actuator based on the target reactive force.

Abstract: An alignment changing control device that includes: a motor drive section which adjusts electrical power supplied to a motor of the electric actuator according to an operation command and, when receiving an operation inhibiting signal, limits or stops supplying the electrical power to the motor; a motor temperature estimating section for calculating an estimated temperature of the motor from at least a current supplied to the motor, an outside air temperature and a vehicle speed, based on heat balance relationship; and a comparators which transmits the operation inhibiting signal to the motor drive section when the estimated temperature of the motor calculated by the motor temperature estimating section is higher than a predetermined temperature, which is equal to or lower than an operation allowable temperature of the motor.

Abstract: A steering controller for an electric power steering device 110 includes a base signal computing part 51 for computing a base signal DT in accordance with at least the steering torque; a damper compensation signal computing part 52 for computing a damper compensation signal in accordance with an angular velocity of an electric motor 4 or a speed of steering wheel turn; and an inertia compensation signal computing part 53 for compensating inertia and viscosity in the steering unit. The electric motor is driven by a target signal IM1 obtained by compensating the base signal with a damper compensation signal and an inertia compensation signal, to provide a steering auxiliary force. The target signal of the auxiliary torque is compensated so that a difference between a reference self-aligning torque of front wheel in a front wheel steering vehicle and a self-aligning torque of front wheel in an all-wheel steering vehicle is provided to a driver as a responsive feeling from the steering torque.

Abstract: A steering device with a constitution in which an operation unit and steerable wheels are not mechanically connected, has a target turning angle setting device which sets a target turning angle of the steerable wheels according to an operation amount of the operation unit, a turning angle measuring device which measures an actual turning angle of the steerable wheels, and a turning actuator which turns the steerable wheels according to a deviation between the target turning angle and the actual turning angle, wherein, when an operating direction of the operation unit is reversed, the target turning angle setting device sets the target turning angle according to the actual turning angle which is measured by the turning angle measuring device at a time of reversing.

Abstract: A steering device in which a steering wheel which a driver operates and wheels which are steered are not mechanically connected has a target turning angle determination device which determines a target turning angle of the wheels according to an operation amount of the steering wheel, a turning angle sensor which measures an actual turning angle of the wheels, a steering motor which turns the wheels according to a deviation between the target turning angle and the actual turning angle, a target steering reaction force setting section which determines a steering reaction force to be applied to the steering wheel, and a steering reaction force motor which applies the steering reaction force, in which a rate of increase of the steering reaction force is raised when the actual turning angle approaches a maximum turning angle.

Abstract: A steering system for a vehicle, includes a control operated by a driver of the vehicle; a measuring device for measuring a quantity of operation of the control by the driver; a steering section including a steering actuator for steering wheels which are mechanically independent of the control; a section for setting a target steering angle in accordance with the quantity of operation measured by the measuring device; a reaction actuator for applying a steering reactive force to the control; a section for setting a virtual steering angle based on a virtual model which represents predetermined dynamic characteristics of the steering section; and a reaction control section for setting a target reactive force in accordance with a difference between the target steering angle and the virtual steering angle, and controlling the reaction actuator based on the target reactive force.

Abstract: A steering apparatus for a vehicle, includes: an operation unit; an input operation magnitude measuring unit; a turning actuator turning steerable wheels; a reaction force actuator; a turning actuator control unit; a reaction force actuator control unit; a planetary gear unit disposed between the operation unit and the turning actuator; a locking element fixing and releasing a component of the planetary gear unit; a locking element operation unit; a locking state detection unit; and a control unit executing at least one of the control operations for increasing magnitude of a control parameter for the turning actuator and for increasing magnitude of a control parameter for the reaction force actuator if it is determined by the locking state detection unit that the locking element is placed in a locked state even though the locking element operation unit is operated so as to place the locking element in the locked state from an unlocked state.

Abstract: A steering system includes a steering wheel, a steering angle sensor detecting a steering angle, a steering motor steering road-wheels, a reaction motor imparting a reaction force to the steering wheel, an ECU driving the steering motor with respect to a detected steering angle and a temperature detecting unit detecting temperatures of the steering motor, the reaction motor or a constituent member involved in the temperatures of the motors. When the temperature detected is larger than a predetermined value, the ECU performs such that a ratio of the rotating angle to the steering angle is made smaller than one that is to result when the temperature is equal to or smaller than the predetermined value, or a reaction force that is to be imparted to the steering wheel is made larger.

Abstract: A steering device with a constitution in which an operation unit and steerable wheels are not mechanically connected, has a target turning angle setting device which sets a target turning angle of the steerable wheels according to an operation amount of the operation unit, a turning angle measuring device which measures an actual turning angle of the steerable wheels, and a turning actuator which turns the steerable wheels according to a deviation between the target turning angle and the actual turning angle, wherein, when an operating direction of the operation unit is reversed, the target turning angle setting device sets the target turning angle according to the actual turning angle which is measured by the turning angle measuring device at a time of reversing.