Abstract: Provided is a brake control device which reliably generates wheel cylinder fluid pressure in all the wheels FR to RR even at the time of failure of the brake control device, can reliably decelerate or stop a vehicle, has a simplified system configuration, and has high reliability for automatic driving. A brake device 101 of the present invention includes a first fluid pressure unit 102p which supplies brake fluid to first wheel cylinders 118a and 118d, a second fluid pressure unit 102s which supplies brake fluid to second wheel cylinders 118b and 118c, and a connection pipe 119 which connects the first fluid pressure unit and the second fluid pressure unit to allow the brake fluid to flow. The first fluid pressure unit and the second fluid pressure unit open a first shut-off valve 104p and a second shut-off valve 104s, respectively, in a case where a failure is detected in at least one of the first fluid pressure unit and the second fluid pressure unit.

Abstract: When another pump is actuated while a pump is de-actuated, a pressure adjustment valve is brought into a valve-opened state after a shut-off valve is actuated in a valve-opening direction and the another pump is actuated.

Abstract: A second control unit controls a pump of a P system and a pump of an S system according to a stroke of a brake pedal that is detected by a stroke sensor in a state that a fluid level of brake fluid in a reservoir tank falls below a predetermined fluid surface level.

Abstract: An object of the invention is to provide a motor control device capable of realizing a redundancy while suppressing an increase in the number of parts and the number of connection signal lines. The invention includes angle sensors 102 and 103 for detecting a rotation angle of a motor, MPU 107 for controlling the motor based on a stroke sensor 117 and receiving the detected value of the angle sensor 102, MPU 108 for controlling the motor based on the stroke sensor 117 and receiving the detected value of the angle sensor 103, and communication units 115 and 116 for transmitting and receiving signals between the MPUs 107 and 108. The MPU 107 includes an angle sensor failure detecting unit 114 for detecting a failure of the angle sensors 102 and 103, according to the detected value of the angle sensor 102, the detected value of the angle sensor 103 received through the communication unit 115, and a control angle of the motor created in response to the stroke sensor 117.

Abstract: There are provided a brake device that enhances the detection accuracy of a system with fluid leakage, regardless of the degree of fluid leakage, and a fluid leakage detection method of the brake device. The brake device includes a hydraulic unit and a control unit.

Abstract: A system comprises: pump (hydraulic pressure source) that uses brake fluid supplied from reservoir tank (reservoir) to generate hydraulic pressure in first hydraulic line, thereby generating hydraulic pressure in wheel cylinder; piston configured to move axially in cylinder under the action of hydraulic fluid supplied from master cylinder, piston dividing cylinder into at least two chambers (positive pressure chamber and backpressure chamber); stroke simulator for generating reaction force to a driver's brake operation by moving piston; second hydraulic line provided between positive pressure chamber in stroke simulator and master cylinder; and third hydraulic chamber provided between backpressure chamber and first hydraulic chamber to transmit brake fluid from backpressure chamber to first hydraulic chamber.

Abstract: It is an object of the invention to provide a brake device capable of detecting a failure in each of components, by which booster control is performed, at an early stage even during vehicle running. The brake device is configured to discharge brake fluid into a communicating fluid path that connects a fluid path of a primary system and a fluid path of a secondary system, and to control a first communicating valve for restricting a flow of brake fluid from the communicating fluid path to the fluid path of the primary system and a second communicating valve for restricting a flow of brake fluid from the communicating fluid path to the fluid path of the secondary system in respective valve-closing directions, so as to check at least a state of the pump.

Abstract: Provided is a brake apparatus capable of securing a braking force on a vehicle even at the time of a fluid leak. The brake apparatus performs control so as to continue generation of a brake hydraulic pressure to be supplied to a wheel cylinder with use of a second hydraulic source if a fluid leak of brake fluid is determined based on a preset relationship between a hydraulic pressure of a first hydraulic source and a stroke of a brake pedal.

Abstract: A brake apparatus includes a master cylinder, a hydraulic source, a reservoir tank, a fluid pool, a fluid level detection unit, and an electronic control unit. The electronic control unit is configured to switch brake control according to the fluid level detected by the fluid level detection unit. The brake fluid is transmitted from the first chamber to the wheel cylinder with use of the master cylinder to increase a pressure in the wheel cylinder. The brake fluid in the second chamber is transmitted to the wheel cylinder with use of the hydraulic source to increase a pressure in the wheel cylinder.

Abstract: An object of the present invention is to provide a brake apparatus capable of acquiring a stable brake performance. A brake apparatus includes a master cylinder configured to be activated according to a brake operation performed by a driver, a reservoir tank divided into at least a first chamber connected to a wheel cylinder via the master cylinder and a second chamber connected to a hydraulic source configured to increase a pressure of brake fluid and transmit the brake fluid to the wheel cylinder, a brake control unit configured to perform brake control of transmitting the brake fluid to the wheel cylinder, and a fluid level detection unit configured to detect a fluid level of the brake fluid in the reservoir tank.

Abstract: Provided is a brake control apparatus and a brake system capable of improving reliability of a performance of holding a hydraulic pressure in a wheel cylinder. A brake control apparatus includes a first valve provided in a first oil passage connecting a hydraulic source configured to supply brake fluid to a wheel cylinder and the wheel cylinder to each other, a return flow oil passage connected to the first oil passage between the hydraulic source and the first valve and configured to return the brake fluid supplied from the hydraulic source to a low-pressure portion, a pressure adjustment valve provided in the return flow oil passage and configured to adjust a brake hydraulic pressure in the first oil passage, and a hydraulic holding portion configured to hold a hydraulic pressure in the wheel cylinder set by a brake hydraulic pressure supplied from the hydraulic source to the wheel cylinder by activating the pressure adjustment valve and the first valve in respective valve-closing directions.

Abstract: A brake apparatus activates a stroke simulator OUT valve in a valve-closing direction to increase a pressure in a wheel cylinder with use of brake fluid flowing out of the stroke simulator according to a state of an operation performed by a driver on a brake pedal. Further, when the hydraulic pressure in the wheel cylinder or a first oil passage is brought into a predetermined state, the brake apparatus activates the stroke simulator OUT valve in a valve-opening direction to cause the brake fluid in the stroke simulator to flow out to a low-pressure portion while restricting the brake fluid in the stroke simulator to a predetermined flow amount.

Abstract: An object of the present invention is to provide a brake apparatus capable of acquiring a sufficient braking force when an abnormality has occurred. The brake apparatus includes a stroke simulator. The stroke simulator is connected to a portion of an oil passage between a master cylinder and a valve. The oil passage connects the master cylinder and a wheel cylinder therebetween. The stroke simulator is configured to generate a brake operation reaction force due to an increase and a reduction in a volume of a positive pressure chamber formed inside the stroke simulator. Brake fluid contained in a first chamber of the master cylinder flows into the positive pressure chamber at the time of control by a by-wire control unit. A fluid amount that can be supplied from the first chamber is larger than a fluid amount that the positive pressure can absorb therein.

Abstract: To provide a brake control apparatus that brings a brake operating member to a proper position during antilock control. At least during operation of an antilock controller 105, valves 23 and 24 are actuated to impart a stroke to a piston 52P with hydraulic pressure generated by the pump 7.

Abstract: A brake apparatus activates a stroke simulator OUT valve in a valve-closing direction to increase a pressure in a wheel cylinder with use of brake fluid flowing out of the stroke simulator according to a state of an operation performed by a driver on a brake pedal. Further, when the hydraulic pressure in the wheel cylinder or a first oil passage is brought into a predetermined state, the brake apparatus activates the stroke simulator OUT valve in a valve-opening direction to cause the brake fluid in the stroke simulator to flow out to a low-pressure portion while restricting the brake fluid in the stroke simulator to a predetermined flow amount.

Abstract: It is an object of the invention to provide a brake device capable of detecting a failure in each of components, by which booster control is performed, at an early stage even during vehicle running. The brake device is configured to discharge brake fluid into a communicating fluid path that connects a fluid path of a primary system and a fluid path of a secondary system, and to control a first communicating valve for restricting a flow of brake fluid from the communicating fluid path to the fluid path of the primary system and a second communicating valve for restricting a flow of brake fluid from the communicating fluid path to the fluid path of the secondary system in respective valve-closing directions, so as to check at least a state of the pump.

Abstract: A system comprises: pump (hydraulic pressure source) that uses brake fluid supplied from reservoir tank (reservoir) to generate hydraulic pressure in first hydraulic line, thereby generating hydraulic pressure in wheel cylinder; piston configured to move axially in cylinder under the action of hydraulic fluid supplied from master cylinder, piston dividing cylinder into at least two chambers (positive pressure chamber and backpressure chamber); stroke simulator for generating reaction force to a driver's brake operation by moving piston; second hydraulic line provided between positive pressure chamber in stroke simulator and master cylinder; and third hydraulic chamber provided between backpressure chamber and first hydraulic chamber to transmit brake fluid from backpressure chamber to first hydraulic chamber.

Abstract: An object of the present invention is to provide a brake apparatus capable of acquiring a stable brake performance. A brake apparatus includes a master cylinder configured to be activated according to a brake operation performed by a driver, a reservoir tank divided into at least a first chamber connected to a wheel cylinder via the master cylinder and a second chamber connected to a hydraulic source configured to increase a pressure of brake fluid and transmit the brake fluid to the wheel cylinder, a brake control unit configured to perform brake control of transmitting the brake fluid to the wheel cylinder, and a fluid level detection unit configured to detect a fluid level of the brake fluid in the reservoir tank.

Abstract: The present invention provides a brake device that can improve the pressure-increasing response of wheel cylinder hydraulic pressure. The invention is provided with: a master cylinder (5) actuated by the driver operating the brake, the master cylinder (5) being connected to a wheel cylinder (8) via a first oil channel (11), and capable of increasing the wheel cylinder hydraulic pressure; and an auxiliary pressure-increasing part (auxiliary pressure-increasing part (106) and stroke simulator (27)) for assisting in the increasing of the wheel cylinder hydraulic pressure by the master cylinder (5) of the pump (7).

Abstract: There is provided a brake apparatus configured to identify a fluid leak spot while generating a braking force. The brake apparatus is configured to drive pump 7 to supply a brake fluid to a first fluid passage (fluid passage 11P, discharge passage 13P) and a second fluid passage (fluid passage 11S, discharge passage 13S), switch communicating valves 23P and 23S alternately between open and closed positions more than once, and detect a brake-fluid leakage in the first or second fluid passage on the basis of magnitudes of detection values detected by hydraulic-pressure sensors 92P and 92S during the open-close switching.