JP2008081101A5 - - Google Patents

Claims (10)

A pair of pads disposed on both sides of the disk and a piston slidably disposed in the bottomed cylinder are propelled by hydraulic pressure supply accompanying the operation of the brake pedal, and the pair of pads are used as the disk. A caliper that generates a braking force when pressed and an electric actuator act as a drive source, and the piston propelled by supplying hydraulic pressure from the hydraulic means into the caliper is mechanically held in the braking position even after the hydraulic pressure is released. A parking brake mechanism to be operated, and a control means for operating the parking brake mechanism to operate the hydraulic pressure means in response to a parking brake instruction signal to supply a predetermined hydraulic pressure to the caliper and hold the piston in a braking position. And the control means, when a parking brake instruction signal is input, When is operated, after the operation of the brake pedal has been completed, the disk brake device, characterized in that actuating said parking brake mechanism hydraulic pressure in the caliper in a state of predetermined pressure. When the parking brake instruction signal is input and the hydraulic pressure in the caliper exceeds a predetermined pressure, the control means holds the predetermined pressure after the hydraulic pressure drops to the predetermined pressure. 2. The disc brake device according to claim 1, wherein the hydraulic pressure means is controlled as described above. A pressure reducing means for reducing the hydraulic pressure in the caliper; and when the parking brake instruction signal is input, the control means reduces the pressure reducing means when the hydraulic pressure in the caliper exceeds a predetermined pressure. 2. The disc brake device according to claim 1, wherein the hydraulic pressure means is controlled so that the predetermined pressure is maintained after the hydraulic pressure is reduced to a predetermined pressure by operating. The controller has a pressure reducing means for reducing the hydraulic pressure in the caliper, and when the parking brake instruction signal is inputted, the control means After controlling the hydraulic pressure means so that the current hydraulic pressure at the start of descent is maintained, and after the operation of the brake pedal is finished, the pressure reducing means is operated to reduce the hydraulic pressure to a predetermined pressure. 2. The disc brake device according to claim 1, wherein the hydraulic pressure means is controlled so that the predetermined pressure is maintained. 2. The control unit according to claim 1, wherein when the hydraulic pressure in the caliper is lower than a predetermined pressure, the hydraulic pressure unit is controlled to increase pressure so that a predetermined hydraulic pressure is supplied into the caliper. 4. The disc brake device according to any one of 4. A piston slidably disposed in a bottomed cylinder is propelled by hydraulic pressure supply accompanying the operation of the brake pedal, and a pair of pads disposed on both sides of the disk are pressed against the disk to apply a braking force. A generated caliper is provided on each wheel of the vehicle, and at least one of the calipers provided on each wheel of the vehicle operates with an electric actuator as a drive source, and fluid from the hydraulic means into the caliper A parking brake mechanism for mechanically holding the piston propelled by pressure supply at a braking position after releasing the hydraulic pressure is provided, and a hydraulic pressure detecting means for detecting a hydraulic pressure of a caliper having the parking brake mechanism and the brake pedal There is provided a control means to which a pedal operation detecting means for detecting the operation of the vehicle and a parking brake switch for outputting a parking brake instruction signal are connected, the control The stage operates the hydraulic pressure means in response to a parking brake instruction signal from the parking brake switch to supply a predetermined pressure of hydraulic pressure to the caliper having the parking brake mechanism and to hold the piston in the braking position. In the disc brake device for operating the parking brake mechanism, when the control means detects that the brake pedal is operated by the pedal operation detecting means when a parking brake instruction signal is input from the parking brake switch The disc brake device is characterized in that, after the pedal operation detecting means detects the end of the brake pedal operation, the parking brake mechanism is operated in a state where the hydraulic pressure detected by the hydraulic pressure detecting means is a predetermined pressure. A pair of pads disposed on both sides of the disk and a piston slidably disposed in the bottomed cylinder are propelled by hydraulic pressure supply accompanying the operation of the brake pedal, and the pair of pads are used as the disk. A caliper that generates a braking force when pressed and an electric actuator act as a drive source, and the piston propelled by supplying hydraulic pressure from the hydraulic means into the caliper is mechanically held in the braking position even after the hydraulic pressure is released. A parking brake mechanism to be operated, and a control means for operating the parking brake mechanism to operate the hydraulic pressure means in response to a parking brake instruction signal to supply a predetermined hydraulic pressure to the caliper and hold the piston in a braking position. In the disc brake device comprising: the control means, when a parking brake instruction signal is input, Pressure if it exceeds the predetermined pressure, the parking disc brake device being characterized in that Separate the retention of by the brake mechanism to the braking position of said piston. When the hydraulic pressure in the caliper exceeds the predetermined pressure, the control means reduces the hydraulic pressure to the predetermined pressure and causes the parking brake mechanism to return to the piston braking position in the state of the predetermined pressure. The disc brake device according to claim 6 or 7, wherein holding is performed. When the hydraulic pressure in the caliper exceeds the predetermined pressure, the control means operates the hydraulic pressure means to increase the pressure to the predetermined pressure after the hydraulic pressure drops to a reference pressure lower than the predetermined pressure. The disc brake device according to claim 6 or 7, wherein the parking brake mechanism holds the piston at a braking position in a state of the predetermined pressure. The control means operates the electric actuator so as to hold the piston at the braking position by the parking brake mechanism in the state of the predetermined pressure, and the hydraulic pressure in the caliper reduces the predetermined pressure. The disc brake device according to any one of claims 6 to 9, wherein when it exceeds, the operation of the electric actuator of the parking brake mechanism is stopped.