Abstract: One embodiment provides a solenoid valve. The solenoid valve includes a fixed core, a movable core and a coil. A first valve seat member and a second valve seat member are fixed in the fixed core, and a valve body member is disposed therebetween. A spring member is interposed between the valve body member and the second valve seat member such that the valve body member is normally seated on the first valve seat member. The valve body member can move away from the first valve seat member to be seated on the second valve seat member, by being pushed by the movable core. And, a guide member holds the valve body member and the spring member to the second valve seat member so as not to move away from the second valve seat member.

Abstract: A brake fluid pressure control system for a vehicle is provided with: a master cylinder activated by the operation of a brake pedal; a motor cylinder device that generates brake hydraulic pressure in response to an operation amount of the brake pedal; first brake fluid flow lines that allow the master cylinder to communicate with wheel cylinders; two-position three-way valves arranged at connection points between the first brake fluid lines and second brake fluid lines. The two-position three-way valves switch between a state in which the master cylinder communicates with the wheel cylinder and a state in which the motor cylinder device communicates with the wheel cylinder.

Abstract: A hydraulic pressure generating device includes a base body having a master cylinder configured to generate a brake hydraulic pressure and a slave cylinder configured to generate a brake hydraulic pressure. The base body is provided with a motor configured as a driving source for the slave cylinder and a control device configured to control the motor. A motor shaft of the motor, a cylinder axis of the master cylinder, and a cylinder axis of the slave cylinder are disposed in parallel with each other. Then a virtual plane including the cylinder axis of the master cylinder is set as a reference plane, a housing of the control device is disposed on one side of the reference plane and the motor is disposed on the other side of the reference plane.

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 brake control device includes a wheel deceleration calculating unit configured to calculate a wheel deceleration of each of wheels of a vehicle, and a front and rear wheel braking distribution controlling unit configured to execute a front and rear wheel braking distribution control for distributing a braking force on front and rear wheels. The front and rear wheel braking distribution controlling unit is configured to start the front and rear wheel braking distribution control on front and rear wheels of one of left and right sides if an absolute value of a wheel deceleration of the front wheel is equal to or larger than a first threshold and an absolute value of a wheel deceleration of the rear wheel is equal to or larger than a second threshold.

Abstract: A hydraulic pressure generating device includes a base body having a master cylinder configured to generate a brake hydraulic pressure and a slave cylinder configured to generate a brake hydraulic pressure. The base body is provided with a motor configured as a driving source for the slave cylinder and a control device configured to control the motor. A motor shaft of the motor, a cylinder axis of the master cylinder, and a cylinder axis of the slave cylinder are disposed in parallel with each other. Then a virtual plane including the cylinder axis of the master cylinder is set as a reference plane, a housing of the control device is disposed on one side of the reference plane and the motor is disposed on the other side of the reference plane.

Abstract: A vehicle brake hydraulic pressure control apparatus includes a base body and a solenoid valve. The solenoid valve is attached to an attachment hole which opens on one surface of the base body. A plurality of press-fitting portions that are press-fitted to an inner peripheral surface of the attachment hole are provided on an outer peripheral surface of the solenoid valve at an interval in a hole axis direction. Contact lengths, in the hole axis direction, between the inner peripheral surface of the attachment hole and two of the press-fitting portions are different from each other.

Abstract: One embodiment provides a hydraulic pressure generation apparatus. In the hydraulic pressure generation apparatus, a motor attached to a base body. The base body includes: a first cylinder hole having a closed bottom in which a first piston is inserted to thereby form a master cylinder; and a second cylinder hole having a closed bottom in which a second piston is inserted to thereby form a slave cylinder. The first cylinder hole and the second cylinder hole have respective openings in a surface of the base body located on one side thereof. Axial lines of the first cylinder hole, the second cylinder hole and an output shaft of the motor are arranged approximately parallel with each other.

Abstract: One embodiment provides a hydraulic pressure generating apparatus including: a base body; a master cylinder; and a stroke sensor, wherein a rear surface of the base body faces a brake operator, a bottomed-cylindrical-shaped first cylinder bore accommodating a first piston of the master cylinder is opened to the rear surface of the base body, and an input member connected to the brake operator is inserted in the first cylinder bore. The stroke sensor, plural solenoid valves and a control unit are attached to one surface of the base body, such that the stroke sensor and the solenoid valves are accommodated within a housing of the control unit. On the one surface, the stroke sensor is disposed adjacent to the rear surface of the base body, and the solenoid valves are disposed adjacent to a front surface of the base body.

Abstract: The hydraulic pressure controlling unit is capable of execute a first control, a second control, and a third control. The third control is configured to be started under condition that during the second control, an anti-lock brake control on the wheel brake on the high-? road side is started, the acceptable differential pressure is equal to or larger than a first threshold, or a steering angle of a steering is equal to or larger than a second threshold. During the third control, the hydraulic pressure controlling unit is configured to decrease the hydraulic pressure of the wheel brake on the high-? road side if the vehicle state deciding unit decides that the vehicle is in an unstable state.

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 choke coil for a brake control device, includes: lead wires; a magnetic core; and a case housing the core. The case includes: a cylindrical core part around which the lead wires are wound; and a base part provided on an outer peripheral surface of the core part. End portions of the lead wires extend laterally from the core part, and holding portions configured to hold the end portions of the lead wires are formed on an outer surface of the base part on the opposite side to the core part side.

Abstract: An input device includes an input rod, a piston, and a cylindrical member. The cylindrical member includes a rod, a locking part, and a slit. The rod receiving part is provided on one end side in an axial direction and configured to receive the end part of the input rod. The locking part is formed on the other end side in the axial direction so as to lock an engaging part of the piston, thereby preventing the input rod from falling off the piston. The slit is formed over the length of the whole of the cylindrical member in the axial direction. The cylindrical member can be elastically deformed in a radial direction due to the slit.

Abstract: A hydraulic pressure generating device includes a base body, a master cylinder provided on the base body and configured to generate a brake hydraulic pressure by a first piston connected to a brake operating element, a housing attached to the base body, a control board contained in the housing, a stroke sensor configured to detect an amount of movement of the first piston; and a detection object member which is detected by the stroke sensor. The housing has a facing wall portion provided so as to face the base body. The stroke sensor is provided inside the housing on the opposite side of the facing wall portion to the base body, and is electrically connected to the control board.

Abstract: One embodiment provides a vehicle brake hydraulic controller including: an antilock braking controlling module configured to perform an antilock braking control in which a brake hydraulic pressure applied to wheel brakes is reduced under the condition that a slip-related amount has reached a pressure reduction threshold value; and a turning judging module configured to judge whether a vehicle is turning based on a steering angle, wherein, when the antilock braking control is performed and in the case that the turning judging module judges that the vehicle is turning, the antilock braking controlling module performs a turning pressure reduction control so as to: change the pressure reduction threshold values to be more easily reached by the slip-related amount than at the time of straight running; and change the pressure reduction amounts to be larger than that at the time of straight running.

Abstract: One embodiment provides a hydraulic pressure generation apparatus including: a base body; a motor; a reservoir tank; a master cylinder which generates a brake hydraulic pressure by a brake manipulator; and a slave cylinder which generates a brake hydraulic pressure the motor. The base body includes: a first cylinder hole which is a bottomed cylinder hole, and in which the first piston is inserted; a second cylinder hole which is a bottomed cylinder hole, and in which the second piston is inserted; and a supply passage which leads from the reservoir tank to a hydraulic chamber of the slave cylinder. The supply passage is provided with a check valve which permits only inflow of brake fluid from the reservoir tank to a side of the slave cylinder, near a brake fluid discharge port of the second cylinder hole.

Abstract: One embodiment provides a vehicle brake hydraulic pressure control apparatus. The apparatus includes an inlet valve; an outlet valve; a pump; a motor and a control unit. The control unit executes an antilock brake control and a control to return a brake fluid accumulated in a reservoir due to a pressure decreasing control in the antilock brake control to a hydraulic pressure source by driving the motor. The control unit includes: a target delivery amount calculator configured to calculate a target delivery amount which corresponds to an amount of brake fluid discharged from the reservoir per a predetermined time; a temperature information fetcher configured to acquire a temperature of the brake fluid; and a drive signal determinator configured to determine a drive signal of the motor based on the target delivery amount and the temperature of the brake fluid.

Abstract: In one embodiment of the brake system, the control unit executes a fluid suction control to suck in the brake fluid from the supply line. The control unit determines whether or not the fluid suction control needs to be executed, and in the event that the control unit determines that the fluid suction control needs to be executed, the control unit is configured to close the cutoff valve and control the electric actuator to drive the slave cylinder in a depressurizing direction.

Abstract: An electronic control unit includes: a sensor board on which a sensor is mounted; a control board configured to control an operation of each electric component, based on a physical quantity detected by the sensor; and a housing configured to accommodate the sensor board and the control board, wherein: in an internal space of the housing, a first accommodation chamber in which the electric component is accommodated, a second accommodation chamber in which the sensor board and the control board are accommodated in a hierarchical state, and a partitioning portion which partitions between the first accommodation chamber and the second accommodation chamber are formed; and the sensor board and the control board are supported by the partitioning portion, and a rib is protrudingly provided on the partitioning portion.

Abstract: One embodiment relates to a vehicle control unit. The vehicle control unit includes a metallic base body and an electronic control unit which is attached to the base body. The electronic control unit includes a housing which is attached to an attaching surface of the base body and a control circuit board which is housed in the housing. A heat radiation portion is provided on the attaching surface so as to be inserted into the housing. The heat radiation portion is brought into abutment with the control circuit board via a heat conducting member. And, a heat conducting member holding portion is formed in the housing so as to hold the heat conducting member with respect to the heat radiation portion.