摘要:
A vehicle steering control apparatus includes a steering wheel to be operated by a driver, a steering mechanism for turning the front wheels in accordance with an operating torque of the steering wheel, and a clutch for mechanically connecting the steering wheel to the steering mechanism. A clutch engagement command issuing section is provided for issuing an engagement command to the clutch when the clutch is disengaged and a condition for engaging the clutch is satisfied. A clutch engagement determining section is provided for determining that the clutch is in an engaged state when an increase in torque is detected at the steering wheel after the engagement command has been issued to the clutch.
摘要:
In vehicular motion control apparatus and method, a vehicle speed variation rate limiter is provided to place a vehicle speed variation rate limitation on a detection value (V) of a vehicle speed and varying a vehicle speed variation rate limiter value in accordance with the detection value (θ) of the vehicular steering angle, at the vehicular motion target value calculation, using an output of the vehicular speed variation rate limiter for a map reference vehicle speed (Vmap) and, at the control command value calculation, using the output of the vehicular speed variation rate limiter to the detection value of the vehicle speed for a control command value calculation purpose.
摘要:
A steering control device in which a steering portion including an electric steering reaction force actuator and a steered portion including an electric steered portion actuator are mechanically disconnectable and connectable via backup means. A steer-by-wire control means is provided for disconnecting the backup means and performing steer-by-wire control using control of the steered portion actuator to set a steered angle corresponding to the steering condition and using control of the steering reaction force actuator to add a steering reaction force corresponding to the steered condition. A steering assistance control means is also provided for connecting the backup means and performing steering assistance control by adding a steering aid force using at least one of the steering reaction force actuator and the steered portion actuator. The power supply capacity of a steered vehicle is selectively estimated and if the estimated power supply capacity reaches a predetermined value or below during the steer-by-wire control, steering is switched to the steering assistance control.
摘要:
A braking force control apparatus for use with an automotive vehicle supported on road wheels each of which has a wheel cylinder for applying a braking force to the corresponding road wheel in response to a fluid pressure introduced thereto. The fluid pressure is controlled by a solenoid valve which is movable between open and closed positions in response to a control signal having a variable duty ratio. The duty ratio of the control signal is changed at predetermined intervals of time to move the solenoid valve in a plurality of steps toward the closed position.
摘要:
A vehicle steering device and method for preventing steering wheel pull. A selectively engageable clutch is positioned between a steering wheel and a turning mechanism for turning at least one steered wheel. The clutch includes an engaging piece and has an engaged position where the steering wheel is mechanically connected to the turning mechanism and a disengaged position where the steering wheel is mechanically separated from the turning mechanism and steer-by-wire controls the at least one steered wheel. When the clutch is moved from the engaged position to the disengaged position, clutch release control is performed that provides a rotational angle of deviation between a steering wheel shaft connected to the steering wheel and the turning mechanism, the rotational angle of deviation provided in the direction of disengagement.
摘要:
A vehicle steering device and method for controlling steering of a steer-by-wire vehicle. A steering instrument receives input from a driver and a turning device turns the wheel(s). A selectively engageable backup clutch is positioned between the steering instrument and the turning device. Whether or not the backup clutch is engaged is based a steering state signal from the steering instrument and a turning state signal from the turning device.
摘要:
In system and method for an automotive vehicle equipped with the system and defined as a system vehicle, a target value of a driving-and-braking force applied to the system vehicle to make a detected value of a system vehicle velocity coincident with a target value of the velocity of the system vehicle is determined, a prime mover of the system vehicle and a transmission thereof in accordance with the target value of the driving-and-braking force is determined, a maximum deceleration force according to the target value of the velocity of the system vehicle and a shift position of the transmission of the system vehicle is estimated, a relative velocity of the system vehicle to the preceding vehicle on the basis of the detected value of the inter-vehicle distance is determined, and the shift position of the transmission is determined on the basis of the target value of the driving-and-braking force, the estimated maximum deceleration force, and the relative velocity.