Abstract: Capable of setting a vehicle characteristic effectively depending on a taste of a vehicle driver, expanding a pleasure of driving with that characteristic setting, including a vehicle characteristic selecting/setting portion for setting the vehicle characteristic to a free arbitrary characteristic in order to intensify the positioning of a vehicle as a tasteful product, so that a vehicle is enabled to travel under a characteristic set up by the vehicle characteristic selecting/setting portion.

Abstract: To provide a controller for an electric power steering system capable of balancing a steering assist force by correcting an offset and improving the steering feeling. A controller for an electric power steering system having motor driving means for driving a motor for electric power steering and motor current detecting means for detecting a current running through the motor is used in which the motor-driving means realizes a motor stop state in which no current runs through the motor under a non-energized state, uses a motor current detection signal under the motor stop state as the offset value of the motor current detecting means, and automatically corrects the offset of the motor current detecting means in accordance with the offset value.

Abstract: An electric power steering device enabled to surely detect a fault of its motor current detector circuit by avoiding the disturbance by an electrically insulated oxide film formed on the contact surface between the commutator and the brush of the motor. An ignition key is turned on, then the motor applied voltage is increased with time to break the oxide film so that the motor current flows normally. The estimated motor current is then compared with the detected motor current. When the absolute value of the difference between those estimated motor current and detected motor currents is over a predetermined limit value, it is determined that the motor current detection circuit is defective. It is also possible to break the oxide film by integrating each difference between the motor current command value and the detected motor current value, thereby increasing the current control value step by step and increase voltage applied to the motor.

Abstract: An electric power steering device enabled to surely detect a fault of its motor current detector circuit by avoiding the disturbance by an electrically insulated oxide film formed on the contact surface between the commutator and the brush of the motor. An ignition key is turned on, then the motor applied voltage is increased with time to break the oxide film so that the motor current flows normally. The estimated motor current is then compared with the detected motor current. When the absolute value of the difference between those estimated motor current and detected motor currents is over a predetermined limit value, it is determined that the motor current detection circuit is defective. It is also possible to break the oxide film by integrating each difference between the motor current command value and the detected motor current value, thereby increasing the current control value step by step and increase voltage applied to the motor.

Abstract: An electric power steering device enabled to surely detect a fault of its motor current detector circuit by avoiding the disturbance by an electrically insulated oxide film formed on the contact surface between the commutator and the brush of the motor. An ignition key is turned on, then the motor applied voltage is increased with time to break the oxide film so that the motor current flows normally. The estimated motor current is then compared with the detected motor current. When the absolute value of the difference between those estimated motor current and detected motor currents is over a predetermined limit value, it is determined that the motor current detection circuit is defective. It is also possible to break the oxide film by integrating each difference between the motor current command value and the detected motor current value, thereby increasing the current control value step by step and increase voltage applied to the motor.

Abstract: In an electric power steering apparatus provided with a steering state detecting means for detecting a steering state of a steering system, a motor control signal generating means for determining and outputting a motor control signal on the basis of a steering state detecting signal outputted from the steering state detecting means, a motor driving means for driving a motor on the basis of a motor control signal outputted from the motor control signal generating means, and a motor control signal monitoring means for monitoring the motor control signal generating means on the basis of the signals outputted from the steering state detecting means and the motor driving means, there are provided with an operation stop detecting means for detecting an operation stop command of the motor control signal generating means, and a steering state signal correcting means disposed between the steering state detecting means and the motor control signal generating means, and the steering state signal correcting means correct

Abstract: A control apparatus of power steering device having functions of monitoring intermediate troubles such as offset or drift out of signal troubles of torque sensor, and limiting the current for limiting the assist function is presented.

Abstract: In an electric power steering apparatus provided with a steering state detecting means for detecting a steering state of a steering system, a motor control signal generating means for determining and outputting a motor control signal on the basis of a steering state detecting signal outputted from the steering state detecting means, a motor driving means for driving a motor on the basis of a motor control signal outputted from the motor control signal generating means, and a motor control signal monitoring means for monitoring the motor control signal generating means on the basis of the signals outputted from the steering state detecting means and the motor driving means, there are provided with an operation stop detecting means for detecting an operation stop command of the motor control signal generating means, and a steering state signal correcting means disposed between the steering state detecting means and the motor control signal generating means, and the steering state signal correcting means correct

Abstract: In an electric power steering apparatus provided with a steering state detecting means for detecting a steering state of a steering system, a motor control signal generating means for determining and outputting a motor control signal on the basis of a steering state detecting signal outputted from the steering state detecting means, a motor driving means for driving a motor on the basis of a motor control signal outputted from the motor control signal generating means, and a motor control signal monitoring means for monitoring the motor control signal generating means on the basis of the signals outputted from the steering state detecting means and-the motor driving means, there are provided with an operation stop detecting means for detecting an operation stop command of the motor control signal generating means, and a steering state signal correcting means disposed between the steering state detecting means and the motor control signal generating means, and the steering state signal correcting means correct

Abstract: In an electric power steering apparatus provided with a steering state detecting means for detecting a steering state of a steering system, a motor control signal generating means for determining and outputting a motor control signal on the basis of a steering state detecting signal outputted from the steering state detecting means, a motor driving means for driving a motor on the basis of a motor control signal outputted from the motor control signal generating means, and a motor control signal monitoring means for monitoring the motor control signal generating means on the basis of the signals outputted from the steering state detecting means and-the motor driving means, there are provided with an operation stop detecting means for detecting an operation stop command of the motor control signal generating means, and a steering state signal correcting means disposed between the steering state detecting means and the motor control signal generating means, and the steering state signal correcting means correct

Abstract: In an electric power steering apparatus provided with a steering state detecting means for detecting a steering state of a steering system, a motor control signal generating means for determining and outputting a motor control signal on the basis of a steering state detecting signal outputted from the steering state detecting means, a motor driving means for driving a motor on the basis of a motor control signal outputted from the motor control signal generating means, and a motor control signal monitoring means for monitoring the motor control signal generating means on the basis of the signals outputted from the steering state detecting means and the motor driving means, there are provided with an operation stop detecting means for detecting an operation stop command of the motor control signal generating means, and a steering state signal correcting means disposed between the steering state detecting means and the motor control signal generating means, and the steering state signal correcting means correct

Abstract: In an electric power steering apparatus provided with a steering state detecting means for detecting a steering state of a steering system, a motor control signal generating means for determining and outputting a motor control signal on the basis of a steering state detecting signal outputted from the steering state detecting means, a motor driving means for driving a motor on the basis of a motor control signal outputted from the motor control signal generating means, and a motor control signal monitoring means for monitoring the motor control signal generating means on the basis of the signals outputted from the steering state detecting means and the motor driving means, there are provided with an operation stop detecting means for detecting an operation stop command of the motor control signal generating means, and a steering state signal correcting means disposed between the steering state detecting means and the motor control signal generating means, and the steering state signal correcting means correct

Abstract: In an electric power steering apparatus provided with a steering state detecting means for detecting a steering state of a steering system, a motor control signal generating means for determining and outputting a motor control signal on the basis of a steering state detecting signal outputted from the steering state detecting means, a motor driving means for driving a motor on the basis of a motor control signal outputted from the motor control signal generating means, and a motor control signal monitoring means for monitoring the motor control signal generating means on the basis of the signals outputted from the steering state detecting means and the motor driving means, there are provided with an operation stop detecting means for detecting an operation stop command of the motor control signal generating means, and a steering state signal correcting means disposed between the steering state detecting means and the motor control signal generating means, and the steering state signal correcting means correct

Abstract: An electric power steering device enabled to surely detect a fault of its motor current detector circuit by avoiding the disturbance by an electrically insulated oxide film formed on the contact surface between the commutator and the brush of the motor. An ignition key is turned on, then the motor applied voltage is increased with time to break the oxide film so that the motor current flows normally. The estimated motor current is then compared with the detected motor current. When the absolute value of the difference between those estimated motor current and detected motor currents is over a predetermined limit value, it is determined that the motor current detection circuit is defective. It is also possible to break the oxide film by integrating each difference between the motor current command value and the detected motor current value, thereby increasing the current control value step by step and increase voltage applied to the motor.

Abstract: In an electric power steering apparatus adapted to control, a motor which provides a steering mechanism with a steering assist on the basis of a steering assist command value operated, by operating means, based on a steering torque and vehicle speed and a current control value operated from a motor current value, a function is provided to apply a limitation to the assist and continue the assist in the event of a minor trouble not requiring to shut down a system. Upon the trouble, a characteristic gain of the current control value to the steering torque is limited by 1/n, and a limitation target value is provided to the 1/n of limitation characteristic.

Abstract: To provide a controller for an electric power steering system capable of balancing a steering assist force by correcting an offset and improving the steering feeling. A controller for an electric power steering system having motor driving means for driving a motor for electric power steering and motor current detecting means for detecting a current running through the motor is used in which the motor-driving means realizes a motor stop state in which no current runs through the motor under a non-energized state, uses a motor current detection signal under the motor stop state as the offset value of the motor current detecting means, and automatically corrects the offset of the motor current detecting means in accordance with the offset value.

Abstract: A control apparatus of power steering device having functions of monitoring intermediate troubles such as offset or drift out of signal troubles of torque sensor, and limiting the current for limiting the assist function is presented.

Abstract: In an electric power steering apparatus provided with a steering state detecting means for detecting a steering state of a steering system, a motor control signal generating means for determining and outputting a motor control signal on the basis of a steering state detecting signal outputted from the steering state detecting means, a motor driving means for driving a motor on the basis of a motor control signal outputted from the motor control signal generating means, and a motor control signal monitoring means for monitoring the motor control signal generating means on the basis of the signals outputted from the steering state detecting means and the motor driving means, there are provided with an operation stop detecting means for detecting an operation stop command of the motor control signal generating means, and a steering state signal correcting means disposed between the steering state detecting means and the motor control signal generating means, and the steering state signal correcting means correct

Abstract: There is provided a control unit for an electric power steering apparatus that controls a motor for giving steering assist force to a steering mechanism, based on a current control value calculated from a steering assist command value calculated based on the steering torque generated in the steering shaft, and a current value of the motor. The control unit has a first controller and a second controller for controlling the motor. Based on a current command value calculated by the second controller, the second controller monitors the first controller that controls the driving of the motor based on the steering assist command value calculated by the first controller. When the first controller is in a status not controlling the steering assist command value, the function of the second controller for monitoring the first controller is limited.

Abstract: There is provided a control unit for an electric power steering apparatus that controls a motor for giving steering assist force to a steering mechanism, based on a current control value calculated from a steering assist command value calculated based on the steering torque generated in the steering shaft, and a current value of the motor. The control unit has a first controller and a second controller for controlling the motor. Based on a current command value calculated by the second controller, the second controller monitors the first controller that controls the driving of the motor based on the steering assist command value calculated by the first controller. When the first controller is in a status not controlling the steering assist command value, the function of the second controller for monitoring the first controller is limited.