Abstract: In the brake control device, a wheel-cylinder hydraulic pressure (Pw) obtained by adding the linear-valve pressure difference to a master-cylinder hydraulic pressure (Pm) is applied to the wheel cylinder while the vehicle is running. When an operation of a brake pedal is started while the vehicle is running (t1), the driving of the hydraulic pump is started. Thereafter, when the vehicle is stopped (t2), the driving of the hydraulic pump is stopped. When the start of movement of the vehicle is detected during an operation of returning the brake pedal (t4) and an operation of re-depressing the brake pedal is detected (t5) in this state (specifically, while the vehicle is in a stopped state, the hydraulic pump is in a stopped state, and the brake pedal is being operated), the driving of the hydraulic pump is started (t5).

Abstract: A diaphragm device comprising: a supporting member; a flexible membrane that is supported by the supporting member; and a housing that accommodates the flexible membrane and the supporting member, and wherein the flexible membrane air-tightly separates a first chamber and a second chamber connected to the outside through a through-hole formed in a membrane supporting portion of the supporting member, inside the housing, wherein an avoidance recessed portion to avoid interference with an opening edge of the through-hole is formed at a position corresponding to the through-hole in the flexible membrane, wherein the avoidance recessed portion is provided at a thick portion thicker than the other portion of the flexible membrane, and the thick portion protrudes toward the first chamber.

Abstract: Vehicle brake device comprises a master cylinder including a master chamber connected to a wheel cylinder, a drive pressure chamber in which a drive pressure is generated for driving a master piston and a fluid pressure chamber in which a fluid pressure is generated in response to a stroke position of the master piston and an operating characteristics setting device for setting operating characteristics of an electromagnetic valve. The operating characteristics include a relationship of the pressure differential in the fluid conduit between the master cylinder side and the wheel cylinder side with respect to the electromagnetic valve based on the supply amount of the electric power detected by the supplied electric power detecting device.

Abstract: There is provided a brake control device for a brake device including a basic fluid pressure generating unit which generates a basic fluid pressure according to an operation to a brake operating member, a hydraulic pump which generates a fluid pressure to generate a differential pressure, a pressure regulating valve which regulates the differential pressure, and a friction brake mechanism which applies a fluid pressure obtained by adding the differential pressure to the basic fluid pressure, to a wheel cylinder. The control device includes a regulating unit which regulates the differential pressure according to an operating amount correlated value and which decreases the differential pressure according to an increase of the basic fluid pressure due to an increase of the operating amount correlated value when the vehicle is stopped and the differential pressure is regulated to a value larger than 0 by an operation to the brake operating member.

Abstract: A valve member having a valve part and a piston part is accommodated in a piston accommodation cylinder part of a case reciprocatably, and a damper chamber that is substantially a sealed space is formed in an anti-valve seat side in the valve member so that fluid flows without flowing via the damper chamber. Accordingly, since the fluid does not pass through the damper chamber, a fluid force that occurs in the piston part due to a fluid flow does not change easily, thus it becomes difficult to increase hunting at the valve members. Moreover, in a vibrational component in the valve member reciprocating direction of the valve members, amplitude of the vibration can be decreased by a damping force generated in the damper chamber.

Abstract: A brake control device for a vehicle includes: a hydraulic brake device including a master cylinder, a wheel cylinder, a differential pressure control valve, and a pump; and a differential pressure control unit that operates the pump and transmits a differential pressure instructing output to the differential pressure control valve to perform a differential pressure control such that a differential pressure is generated; wherein the differential pressure control unit includes a correcting unit, wherein the correcting unit calculates a differential pressure instructing correction amount, based on an increased amount of the differential pressure which is generated by the differential pressure control valve when the increased amount of the differential pressure during the differential pressure control and then corrects the differential pressure instructing output based on the differential pressure instructing correction amount such that the differential pressure instructing output becomes larger than the increas

Abstract: In a check valve in which a valve part is disposed in a valve part accommodating recess movably relative to a piston part, among the valve part accommodating recess, an anti-valve seat side accommodation space formed between a surface of the valve part accommodating recess in an anti-valve seat side of the valve part and a wall surface of the valve part accommodating recess are communicated to exit side fluid passages.

Abstract: There is provided a vehicle mass estimating apparatus including an acceleration detecting unit which detects an acceleration of a vehicle, a driving-force calculating unit which calculates a driving force of the vehicle corresponding to the acceleration, a steering-angle associated value detecting unit which detects a steering-angle associated value which is associated with a steering angle of the vehicle at a detection time of the acceleration, and a mass estimating unit which estimates a vehicle mass at the detection time of the acceleration based on the acceleration and the driving force on a condition that the steering angle associated value satisfies a predetermined condition.

Abstract: A braking device comprises: a master cylinder; an electrical pressure adjusting unit; a reaction force generating unit, which forms a reaction force chamber and which generate a reaction hydraulic pressure in the reaction force chamber; a reservoir for brake fluid; an inter-chamber brake fluid path; a reservoir path that connects the reservoir and the inter-chamber brake fluid path; and a normally-closed control valve, wherein the electrical pressure adjusting unit includes an electrical pump which is directly connected with the driving hydraulic pressure chamber to supply the brake fluid to the driving hydraulic pressure chamber, and wherein at least one of electromagnetic valves provided in the electrical pressure adjusting unit and the reaction force generating unit is a normally-opened electromagnetic valve, which is provided in the inter-chamber brake fluid path and is configured to communicate the inter-chamber brake fluid path in a non-conduction state.

Abstract: A hydraulic pressure control device includes: a hydraulic pressure unit, in which a solenoid valve for hydraulic pressure control is assembled with a hydraulic pressure block; and an electronic control unit, which includes a circuit board having a drive control circuit of the solenoid valve and stored inside a resin case, wherein a solenoid coil is fit onto the main body of the solenoid valve fixed to the hydraulic pressure block of hydraulic pressure unit, and wherein the solenoid coil is elastically pressed against and fixed to the hydraulic pressure block by a coil pressing arm integrally formed with the resin case.

Abstract: An electric connecting structure between a substrate and an electric component includes a substrate mounted in a case, an electric component assembled to a member which the case is mounted, a bus bar fixed to the case and connected to an electric circuit on the substrate at its one end and a spring disposed in compressed state between the bus bar and an electrode formed on the electric component. The substrate is electrically connected to the electric component through the bus bar and the spring and a held portion formed on the spring is held by a spring holding portion integrally formed on the bus bar.

Abstract: The rotating machine includes a rotating shaft, a case surrounding the rotating shaft, the case being provided with a fluid storing chamber and formed with a housing section. The rotating machine further includes a bearing disposed in the housing section and supporting the rotating shaft, and a ring-like seal member disposed between the fluid storing chamber and the bearing for suppressing the fluid from flowing through a clearance between the rotating shaft and the case. The case is formed with a drain hole for making communication between atmosphere and a space surrounded by the seal member and the bearing within the case and discharging the fluid leaking from the fluid storing chamber and passing the seal member to enter the space, and an atmosphere introducing hole for introducing outside air into the space to keep the space at atmospheric pressure.

Abstract: A vehicle brake device is provided with a master piston which is driven to generate a master cylinder pressure. The device includes a pressure accumulation portion that accumulates the brake fluid under pressure; a servo pressure generation portion that is configured to be able to generate the servo pressure using the brake fluid in the pressure accumulation portion regardless of the operation of the brake operation member; brake fluid consumption correlative value detection means for detecting a brake fluid consumption correlative value relating to a consumption of the brake fluid in the pressure accumulation portion; and failure detection means for driving the master pistons only by the servo pressure using the servo pressure generation portion in a state where the brake operation member is not operated, and detecting a failure of a master system, based on a brake fluid consumption correlative value detected by the brake fluid consumption correlative value detection means at that time.

Abstract: A vehicle brake device includes a failure detection means for driving the master piston only by the operation force of the brake operation member along with the operation of the brake operation member, thereby to detect a failure of a master system, when a master cylinder pressure correlation value correlated to the master cylinder pressure is less than a predetermined value, in a case where an operation amount of the brake operation member is a predetermined amount or in a case where the operation force of the brake operation member is a predetermined force; and a driving control means for driving the master piston by force corresponding to the servo pressure in the servo chamber generated by the servo pressure generation portion, when the operation amount of the brake operation member is greater than a predetermined amount, or when the operation force of the brake operation member is greater than a predetermined force, in the operation of the brake operation member in which the failure detection means detec

Abstract: A vehicle brake device includes a master cylinder having a master piston moved by servo pressure in a servo chamber and master pressure of a master chamber is changed by movement of the master piston. A mechanical servo pressure generating unit is connected to a high pressure source and the servo chamber, and generates a servo pressure within the servo chamber according to pilot pressure within a pilot chamber based on brake fluid pressure of the high pressure source. An electrical pilot pressure generating unit is connected to the pilot chamber and generates desired pilot pressure within the pilot chamber, and a master chamber-to-pilot chamber brake fluid line connects the master chamber with the pilot chamber so pilot pressure is generated by the pilot pressure generating unit during normal operation of a power supply system, and the master pressure is used as pilot pressure when the power supply system fails.

Abstract: A vacuum brake booster includes a movable wall forming a vacuum chamber and a variable pressure chamber in a housing and a valve body connected to the movable wall. A valve mechanism having a vacuum valve for establishing or interrupting the communication between both chambers corresponding to the movement of a plunger and having an air valve for establishing or interrupting the communication between the variable pressure chamber and atmosphere are disposed in an axial hole of the valve body. Atmosphere after the air valve passed flows into the variable pressure chamber through an axial passage and a radial passage formed in the valve body. The axial passage is constituted by a cylindrical inner passage formed at the outer circumference of the plunger by an arc-like flow regulating wall and an arc-like inner circumferential wall portion and an outer passage formed at the outer circumference of the inner passage.

Abstract: A rotary machine includes a rotary shaft having two driving reactive force receiving parts that are displaced in an axial direction and are applied with diametrical reactive forces having different rotation phases from driving targets as normal loads; and bearings that rotatably support the rotary shaft wherein the rotary shaft is rotated at a state where the rotary shaft is supported by the bearings to drive the driving targets via the driving reactive force receiving parts, wherein the bearings are respectively provided at both axial sides of one of the two driving reactive force receiving parts, which receives a higher normal load, and wherein a leading end side of the rotary shaft more than the other of the two driving reactive force receiving part, which receive a lower normal load lower than the higher normal load, is configured as a free end.

Abstract: There is provided a torque transmission device which connects two rotary shafts having shaft ends opposing each other, such that torque is transmitted through a torque transmission mechanism provided to a shaft end surface of each of the two rotary shafts. A first rotary shaft of the two rotary shafts has a double-supported structure where both end portions of the first rotary shaft are supported by bearings, respectively. A second rotary shaft of the two rotary shafts has a cantilever structure where only one end portion of the second rotary shaft opposite to the torque transmission mechanism is supported by a bearing, and the second rotary shaft is spaced from one bearing of the bearings supporting the first rotary shaft, the one bearing being provided at a side of the torque transmission mechanism.

Abstract: A shaft seal device includes: a rotary shaft; a seal member that is arranged on an outer periphery of the rotary shaft; a liquid chamber; and a seal member accommodation chamber that accommodates the seal member therein, wherein the liquid chamber and the seal member accommodation chamber is separated by a partition wall, wherein the rotary shaft passes through a shaft hole formed in the partition wall and an outer periphery of the rotary shaft is sealed by the seal member, wherein the partition wall is formed with a through-hole penetrating the partition wall, a hollow member is mounted in the through-hole, a protrusion part of the hollow member protrudes toward the seal member accommodation chamber to engage with the seal member, and wherein the liquid chamber and the seal member accommodation chamber communicate with each other through a hole of the hollow member.