Abstract: A brake fluid pressure control apparatus for a vehicle includes a parameter calculation unit configured to calculate a rollover detection parameter; and a steering maneuver determination unit configured to determine whether an abrupt steering maneuver is made. The parameter calculation unit is configured to calculate a first composition roll angle as the rollover detection parameter, by combining at a predetermined weight assignment ratio a first roll angle equivalent to an actual roll angle with a second roll angle obtained using a parameter which changes with a phase earlier than the first roll angle, and to calculate the first composition roll angle by changing the weight assignment ratio such that a weight of the second roll angle is higher when the steering maneuver determination unit determines that an abrupt steering maneuver is made than when the steering maneuver determination unit determines that the abrupt steering maneuver is not made.

Abstract: A brake fluid pressure control apparatus for a vehicle includes a parameter calculation unit configured to calculate a rollover detection parameter; and a steering maneuver determination unit configured to determine whether an abrupt steering maneuver is made. The parameter calculation unit is configured to calculate a first composition roll angle as the rollover detection parameter, by combining at a predetermined weight assignment ratio a first roll angle equivalent to an actual roll angle with a second roll angle obtained using a parameter which changes with a phase earlier than the first roll angle, and to calculate the first composition roll angle by changing the weight assignment ratio such that a weight of the second roll angle is higher when the steering maneuver determination unit determines that an abrupt steering maneuver is made than when the steering maneuver determination unit determines that the abrupt steering maneuver is not made.

Abstract: A brake fluid pressure control apparatus for a vehicle includes a parameter calculation unit configured to calculate a rollover detection parameter; and a steering maneuver determination unit configured to determine whether an abrupt steering maneuver is made. The parameter calculation unit is configured to calculate a first composition roll angle as the rollover detection parameter, by combining at a predetermined weight assignment ratio a first roll angle equivalent to an actual roll angle with a second roll angle obtained using a parameter which changes with a phase earlier than the first roll angle, and to calculate the first composition roll angle by changing the weight assignment ratio such that a weight of the second roll angle is higher when the steering maneuver determination unit determines that an abrupt steering maneuver is made than when the steering maneuver determination unit determines that the abrupt steering maneuver is not made.

Abstract: In a vehicle braking system for stabilizing vehicle behavior: a motor control unit determines whether or not the motor control unit receives a drive forbid signal from a yaw-moment control unit, when the motor control unit receives a drive instruction signal from a vehicle-behavior stabilization control unit. The motor control unit receives the drive forbid signal when the yaw-moment control unit performs yaw-moment control. The motor control unit forbids prepressurization using a slave cylinder, when the motor control unit receives the drive forbid signal.

Abstract: An object of the present invention is to provide a vehicle turning control system capable of maintaining stability of a vehicle, even in a case where a mode of output characteristics of a power plant for the vehicle is switched by a driver's operation. In a running mode in which output characteristics of an engine is higher, the vehicle turning control system increases a control gain of a feedforward control unit for performing yaw moment control of the vehicle by feedforward control, and decreases a control gain of a feedback control unit for performing yaw moment control of the vehicle by feedback control. A control gain of vehicle behavior stabilization control performed by the vehicle behavior stabilization control unit is controlled commonly regardless of the running mode.

Abstract: A brake fluid pressure control apparatus for a vehicle includes a parameter calculation unit configured to calculate a rollover detection parameter; and a steering maneuver determination unit configured to determine whether an abrupt steering maneuver is made. The parameter calculation unit is configured to calculate a first composition roll angle as the rollover detection parameter, by combining at a predetermined weight assignment ratio a first roll angle equivalent to an actual roll angle with a second roll angle obtained using a parameter which changes with a phase earlier than the first roll angle, and to calculate the first composition roll angle by changing the weight assignment ratio such that a weight of the second roll angle is higher when the steering maneuver determination unit determines that an abrupt steering maneuver is made than when the steering maneuver determination unit determines that the abrupt steering maneuver is not made.

Abstract: A vehicle turn control system including: a running-condition-information acquisition unit which acquires running-condition information for a vehicle; a brake-manipulation-information acquisition unit which acquires information on manipulation for braking by a driver of the vehicle; and a brake control unit which performs brake control of the vehicle based on the information on manipulation for braking which is acquired by the brake-manipulation-information acquisition unit, and performs brake control for generation of a yaw moment in a body of the vehicle by use of a hydraulic system on the basis of the running-condition information which is acquired by the running-condition-information acquisition unit. The brake control unit imposes a limit on an amount of the brake control for generation of the yaw moment when the brake-manipulation-information acquisition unit acquires the information on manipulation for braking during execution of the brake control for generation of the yaw moment.

Abstract: A brake fluid pressure control apparatus for a vehicle includes a parameter calculation unit configured to calculate a rollover detection parameter; and a steering maneuver determination unit configured to determine whether an abrupt steering maneuver is made. The parameter calculation unit is configured to calculate a first composition roll angle as the rollover detection parameter, by combining at a predetermined weight assignment ratio a first roll angle equivalent to an actual roll angle with a second roll angle obtained using a parameter which changes with a phase earlier than the first roll angle, and to calculate the first composition roll angle by changing the weight assignment ratio such that a weight of the second roll angle is higher when the steering maneuver determination unit determines that an abrupt steering maneuver is made than when the steering maneuver determination unit determines that the abrupt steering maneuver is not made.

Abstract: A turning control device for a vehicle includes: a first standard yaw rate calculation unit that calculates a first standard yaw rate on the basis of detection signals of the lateral acceleration detection unit and the vehicle speed detection unit, a correction unit that corrects the first standard yaw rate, in an increasing direction on the basis of detection signals of a steering amount detection unit and the vehicle speed detection unit, and calculates a second standard yaw rate, a braking force control amount calculation unit that calculates a yaw rate deviation that is a deviation between the second standard yaw rate and an actual yaw rate, which is detected by the yaw rate detection unit, and determines a braking force control amount so as to cancel out the yaw rate deviation, and a braking control unit that controls the braking force on the basis of the braking force control amount determined by the braking force control amount calculation unit.

Abstract: In a pendular motion determination unit of a motion stabilizer for a tractor, a parameter computation unit computes a determination parameter PA indicative of a quantity of change in an actual yaw rate Y, a threshold value setting unit computes a threshold value PAth for the parameter PA, and a determination unit determines that a pendular motion caused by swaying motion of a trailer is imparted, if the parameter PA is greater than the threshold value PAth. Based upon at least one of a value related to the actual yaw rate Y and a value related to the standard yaw rate Ys, an evaluation value computation unit computes a steering-back maneuver evaluation value TS (indicative of a possibility of making periodical steering-back maneuvers), based upon which at least one of the threshold value PAth and the parameter PA is changed.

Abstract: An object of the present invention is to provide a vehicle turning control system capable of maintaining stability of a vehicle, even in a case where a mode of output characteristics of a power plant for the vehicle is switched by a driver's operation. In a running mode in which output characteristics of an engine is higher, the vehicle turning control system increases a control gain of a feedforward control unit for performing yaw moment control of the vehicle by feedforward control, and decreases a control gain of a feedback control unit for performing yaw moment control of the vehicle by feedback control. A control gain of vehicle behavior stabilization control performed by the vehicle behavior stabilization control unit is controlled commonly regardless of the running mode.

Abstract: In a vehicle braking system for stabilizing vehicle behavior: a motor control unit determines whether or not the motor control unit receives a drive forbid signal from a yaw-moment control unit, when the motor control unit receives a drive instruction signal from a vehicle-behavior stabilization control unit. The motor control unit receives the drive forbid signal when the yaw-moment control unit performs yaw-moment control. The motor control unit forbids prepressurization using a slave cylinder, when the motor control unit receives the drive forbid signal.

Abstract: A vehicle turn control system including: a running-condition-information acquisition unit which acquires running-condition information for a vehicle; a brake-manipulation-information acquisition unit which acquires information on manipulation for braking by a driver of the vehicle; and a brake control unit which performs brake control of the vehicle based on the information on manipulation for braking which is acquired by the brake-manipulation-information acquisition unit, and performs brake control for generation of a yaw moment in a body of the vehicle by use of a hydraulic system on the basis of the running-condition information which is acquired by the running-condition-information acquisition unit. The brake control unit imposes a limit on an amount of the brake control for generation of the yaw moment when the brake-manipulation-information acquisition unit acquires the information on manipulation for braking during execution of the brake control for generation of the yaw moment.

Abstract: A pendular motion determination unit of a motion stabilizer for a tractor includes a parameter computation unit configured to compute a determination parameter PA indicative of a quantity of change in an actual yaw rate Y, a threshold value setting unit configured to compute a threshold value PAth for the determination parameter PA, and a determination unit configured to determine that a pendular motion caused by swaying motion of a trailer is imparted, if the determination parameter PA is greater than the threshold value PAth. At least one of PAth and PA is changed based upon a correlation of a value related to a lateral acceleration based yaw rate Yg with a value related to the standard yaw rate Ys and a correlation of a value related to the actual yaw rate Y with a value related to the standard yaw rate Ys.

Abstract: A turning control device for a vehicle which generates a yaw moment in the body of a vehicle includes: a steering wheel turning amount detection device which detects a steering wheel turning amount of the vehicle; a vehicle speed detection device which detects a vehicle speed of the vehicle; a feedforward control amount calculation unit which calculates a feedforward control amount based on at least the steering wheel turning amount; a braking force control amount calculation unit which determines a braking force control amount based on the feedforward control amount; a braking control device which controls the braking force based on the braking force control amount; and a steering direction determination device which determines whether a steering direction is an incremental steering direction or a returning-steering direction. The feedforward control amount calculation unit includes a feedforward control amount correction unit which corrects the feedforward control amount.

Abstract: In a pendular motion determination unit of a motion stabilizer for a tractor, a parameter computation unit computes a determination parameter PA indicative of a quantity of change in an actual yaw rate Y, a threshold value setting unit computes a threshold value PAth for the parameter PA, and a determination unit determines that a pendular motion caused by swaying motion of a trailer is imparted, if the parameter PA is greater than the threshold value PAth. Based upon at least one of a value related to the actual yaw rate Y and a value related to the standard yaw rate Ys, an evaluation value computation unit computes a steering-back maneuver evaluation value TS (indicative of a possibility of making periodical steering-back maneuvers), based upon which at least one of the threshold value PAth and the parameter PA is changed.

Abstract: A pendular motion determination unit of a motion stabilizer for a tractor includes a parameter computation unit configured to compute a determination parameter PA indicative of a quantity of change in an actual yaw rate Y, a threshold value setting unit configured to compute a threshold value PAth for the determination parameter PA, and a determination unit configured to determine that a pendular motion caused by swaying motion of a trailer is imparted, if the determination parameter PA is greater than the threshold value PAth. At least one of PAth and PA is changed based upon a correlation of a value related to a lateral acceleration based yaw rate Yg with a value related to the standard yaw rate Ys and a correlation of a value related to the actual yaw rate Y with a value related to the standard yaw rate Ys.

Abstract: A turning control device for a vehicle includes: a first braking force control amount calculation unit that determines a first braking force control amount on the basis of detection signals of a steering amount detection unit and a detection unit, a second braking force control amount calculation unit that calculates a yaw rate deviation between a standard yaw rate and an actual yaw rate detected by the yaw rate detection unit and determines a second braking force control amount so as to cancel out the yaw rate deviation, and a braking control unit that controls the braking force on the basis of a total braking force control amount acquired by either adding or multiplying the first braking force control amount and the second braking force control amount.

Abstract: A turning control device for a vehicle which generates a yaw moment in the body of a vehicle includes: a steering wheel turning amount detection device which detects a steering wheel turning amount of the vehicle; a vehicle speed detection device which detects a vehicle speed of the vehicle; a feedforward control amount calculation unit which calculates a feedforward control amount based on at least the steering wheel turning amount; a braking force control amount calculation unit which determines a braking force control amount based on the feedforward control amount; a braking control device which controls the braking force based on the braking force control amount; and a steering direction determination device which determines whether a steering direction is an incremental steering direction or a returning-steering direction. The feedforward control amount calculation unit includes a feedforward control amount correction unit which corrects the feedforward control amount.

Abstract: A turning control device for a vehicle includes: a first standard yaw rate calculation unit that calculates a first standard yaw rate on the basis of detection signals of the lateral acceleration detection unit and the vehicle speed detection unit, a correction unit that corrects the first standard yaw rate, in an increasing direction on the basis of detection signals of a steering amount detection unit and the vehicle speed detection unit, and calculates a second standard yaw rate, a braking force control amount calculation unit that calculates a yaw rate deviation that is a deviation between the second standard yaw rate and an actual yaw rate, which is detected by the yaw rate detection unit, and determines a braking force control amount so as to cancel out the yaw rate deviation, and a braking control unit that controls the braking force on the basis of the braking force control amount determined by the braking force control amount calculation unit.