Abstract: A hydraulic pressure generation device includes: an electric motor that generates first rotational power; a reduction gear that decelerates the first rotational power and outputs second rotational power; a conversion mechanism that includes a rotating member for performing rotational motion and a linear motion member for performing linear motion, and converts the second rotational power into linear power of the linear motion member; a piston that is inserted into a cylinder formed in a housing holding the reduction gear, and adjusts hydraulic pressure in the cylinder by the linear power; and a disc spring disposed on the side opposite to the cylinder with respect to the linear motion member in the direction of a rotation axis of the rotating member. The disc spring generates a spring force that inhibits movement of the linear motion member caused by the hydraulic pressure when the electric motor cannot generate the first rotational power.

Abstract: A braking control device is made to function as a stop-related value acquisition unit that acquires a stop-related value so that the value decreases as a vehicle approaches a predetermined stop position, a control unit that starts stop-time braking control for stopping the vehicle in a state in which the braking force applied to the vehicle is smaller than a requested braking force when the stop-related value is equal to or less than a threshold value, and a threshold value setting unit that sets the threshold value to a smaller value as the stop-related value decreases before the stop-time braking control is started.

Abstract: A hydraulic pressure generation device includes: an electric motor that generates first rotational power; a reduction gear that decelerates the first rotational power and outputs second rotational power; a conversion mechanism that includes a rotating member for performing rotational motion and a linear motion member for performing linear motion, and converts the second rotational power into linear power of the linear motion member; a piston inserted into a cylinder to adjust hydraulic pressure of the cylinder by the linear power; and a buffer member that, when the electric motor cannot generate the first rotational power, absorbs kinetic energy of a moved member moved in a direction along a rotation axis of the rotating member by the hydraulic pressure. The buffer member is on a side opposite to the cylinder with respect to the moved member in the rotation axis direction, and absorbs kinetic energy by colliding with the moved member.

Abstract: A motion manager for a vehicle includes one or more processors, and the one or more processors are configured to: receive acceleration request values from a plurality of applications and driver assistance levels associated with the respective acceleration request values; select the smallest acceleration request value of the plurality of acceleration request values received; select the highest driver assistance level of the plurality of driver assistance levels received; and while outputting a specified value according to the selected acceleration request value to an actuator of the vehicle, stop the output of the specified value under a condition according to the selected driver assistance level.

Abstract: An actuator supplies a front wheel brake fluid pressure and a rear wheel brake fluid pressure equal to generate front and rear wheel frictional braking forces. A controller calculates a braking force required as a whole of a vehicle, and calculates front and rear wheel required braking forces so that a sum of the front and rear wheel required braking force matches a target vehicle body braking force and the ratio of the rear wheel required braking force to the front wheel required braking force is a constant value. A rear wheel restricted regenerative braking force is calculated by multiplying the maximum front wheel regenerative braking force by a constant value, and the smaller one of maximum rear wheel regenerative braking force and the rear wheel restricted regenerative braking force is determined as the rear wheel reference regenerative braking force.

Abstract: In an electric cylinder device including a third gear that rotates by receiving rotation of an electric motor and a linear motion conversion mechanism that converts the rotation of the third gear into linear motion of a piston inside a cylinder, a nut, which is a linear motion portion of the linear motion conversion mechanism, and the piston are connected in a state in which relative displacement in a radial direction is allowed.

Abstract: A control device 50 includes a control unit M19 that implements an ABS control for suppressing both the left and right wheels of a vehicle from being locked by adjusting the braking forces of both the left and right wheels. In the ABS control, the control unit M19 executes a cross processing of alternately switching between a right-wheel period in which the right wheel, of the left and right wheels, is the first wheel for increasing the braking force and the left wheel is the second wheel for adjusting the braking force in a range of less than the braking force of the first wheel, and a left-wheel period in which the left wheel is the first wheel and the right wheel is the second wheel, and executes a cross processing of increasing the braking force of the second wheel in both the left-wheel period and the right-wheel period.

Abstract: A controller for a four-wheel steering vehicle sets a command front wheel steering angle, which is a commanded value of a front wheel steering angle, and a command rear wheel steering angle, which is a commanded value of a rear wheel steering angle. The controller acquires the front wheel steering angle and the rear wheel steering angle. The controller calculates an ideal yaw rate based on the command front wheel steering angle and the command rear wheel steering angle as input variables. The controller calculates an estimated yaw rate based on the front wheel steering angle and the rear wheel steering angle as input variables. The controller calculates a deviation of the estimated yaw rate from the ideal yaw rate. The controller corrects at least one of the command front wheel steering angle and the command rear wheel steering angle based on the deviation as an input variable.

Abstract: A brake control device includes: an acquisition section that acquires a steering angle and a first steering angular velocity passed through a first low-pass filter; a braking processing section that decides to apply braking force to a wheel by a brake device when the absolute value of steering angle is not less than a predetermined angle and the absolute value of first steering angular velocity is not less than a predetermined velocity; and a control section that drives the brake device according to the braking processing section's decision. The acquisition section acquires a second steering angular velocity including higher frequency components than the first steering angular velocity, the braking processing section decides to execute predetermined preload control when the absolute value of second steering angular velocity is not less than the predetermined velocity, and the control section executes preload control on the brake device to improve the brake device's responsiveness.

Abstract: An electric braking device generates a braking force by pressing a friction member against a rotating member that rotates integrally with a wheel of a vehicle, and includes a rotating unit that is part of a transmission path of power from an electric motor to the friction member, and rotates in synchronization with the electric motor, and a rotation angle detecting unit that detects a rotation angle of the electric motor by detecting rotation of a detected portion provided at the rotating unit.

Abstract: When operating a braking operation member to stop a vehicle, a processing circuit of a braking control device executes a reduction correction control for applying an instruction braking force that is smaller than a required braking force to the vehicle to prevent an attitude change of the vehicle accompanying the stopping. The processing circuit functions as: an operation amount increase determination unit configured to determine whether the operation amount is increasing while the reduction correction control is being executed; and an instruction value increase unit configured to, when the operation amount increase determination unit determines that the operation amount is increasing, increase the instruction braking force so that a difference between the instruction braking force and the required braking force decreases.

Abstract: As an example, an electric cylinder device according to an embodiment includes a housing provided with a cylinder, a piston disposed inside the cylinder, a rotating member that rotates about a rotational axis, a linear motion member attached to the rotating member so as to move in a first direction along the rotational axis or a second direction opposite to the first direction according to rotation of the rotating member, the linear motion member pushing the piston so as to reduce a volume of a liquid chamber of the cylinder by moving in the first direction, and a first engaging portion provided at the piston, a second engaging portion that is provided at the linear motion member and contacts the first engaging portion to restrict a separation of the linear motion member from the piston in the second direction.

Abstract: A braking control device includes an upper braking unit that outputs a supply pressure by matching a servo pressure generated by a hydraulic pressure generation unit with a target servo pressure calculated based on an operation amount of a braking operation member, and a lower braking unit disposed between the upper braking unit and a wheel cylinder. The upper braking unit stops the hydraulic pressure generation unit in a case of a first abnormality in which the servo pressure is insufficient, and continues an operation of the hydraulic pressure generation unit in a case of a second abnormality in which the servo pressure is sufficient but the supply pressure is insufficient. In the case of the first and second abnormalities, the lower braking unit increases the supply pressure and outputs the increased supply pressure to the wheel cylinder.

Abstract: A vehicle braking device includes a first braking portion including an electric cylinder using a first electric motor as a drive source, and a second braking portion including a differential pressure adjustment valve provided in a flow path connected to the wheel cylinder. Hydraulic pressure generated by the electric cylinder is a first braking pressure, and differential pressure adjusted by the differential pressure adjustment valve is a second braking pressure. With a target value of wheel cylinder hydraulic pressure as a target pressure, a control device executes overheat restriction processing of repeating forward and reverse rotation of the first electric motor to hold the first braking pressure at a value below the target pressure and adjusting a valve closing force of the differential pressure adjustment valve to generate the first and second braking pressures to satisfy the target pressure by a sum of the first and second braking pressures.

Abstract: A braking device includes: a rotation member, a linear motion member movable in first and second directions when the rotation member is rotated in first and second rotational directions respectively, a piston capable of pressing a brake pad in the first direction by being pressed in the first direction by the linear motion member; and a protrusion protruding from the brake pad, accommodated in a recess in the piston, and having an inclined surface inclined obliquely with respect to a rotational axis. When the piston is rotated in the second rotational direction, the piston contacts the inclined surface of the brake pad at a recess first end surface, and presses the brake pad in the first direction, and when the protrusion is viewed in the first direction, a projected area of the inclined surface is greater than half of a projected area of the protrusion.

Abstract: An electric cylinder device includes an electric cylinder and a control device. The electric cylinder includes an elastic body that applies, to a piston, a force to press the piston in a forward direction when the piston is located at an end-point position. The control device executes a process of moving the piston to the end-point position. In this process, the electric motor is driven such that the electric motor rotation speed becomes a target rotation speed to move the piston backward, and when a value of current flowing through the electric motor increases more than a determination value, it is determined that the piston reaches the end-point position, and electric motor driving is ended. The determination value is a value obtained by increasing the value of the current flowing through the electric motor when the electric motor rotation speed follows the target rotation speed.

Abstract: A control device is applied to a friction brake device of a vehicle. The friction brake device produces a friction brake force in the vehicle by starting driving of an electric motor. The control device includes a motor control unit configured to control the electric motor. The control device includes an acquisition unit configured to acquire an index value corresponding to a magnitude of a target value of the friction brake force. A value for determining a magnitude of the index value is set as a limit determination value. The motor control unit limits an increase speed of the number of rotations of the electric motor if the index value is equal to or less than the limit determination value, and releases the limit if the index value exceeds the limit determination value.

Abstract: This hydraulic pressure generation device includes: an electric cylinder that is powered by an electric motor; a fifth flow path through which brake fluid in a cylinder of the electric cylinder flows toward a wheel cylinder when the brake fluid is discharged from an output port; and a resistance generation part provided in the fifth flow path. The resistance generation part is configured such that the flow resistance of the brake fluid flowing in a depressurization direction through the fifth flow path is greater than the flow resistance of the brake fluid flowing in a pressurization direction through the fifth flow path.

Abstract: A processing circuit of an electric braking device includes a base-value derivation unit configured to derive a value corresponding to a target braking force as a piston-thrust base value, a first adder configured to calibrate the piston-thrust base value so that a computational result between the calibration value and the piston-thrust base value in a case where the target braking force decreases and the target braking force becomes a prescribed braking force will be greater than a computational result between the calibration value and the piston-thrust base value in a case where the target braking force increases and the target braking force becomes a prescribed braking force, and a motor control unit configured to control the electric motor by supplying power based on the computational result by the first adder to the electric motor.

Abstract: When a deviation in an output of a control pressure sensor is confirmed, a control unit executes output calibration for the control pressure sensor in a state where a piston of an electric cylinder is moved in retreat direction Zb from a standby position.