Brake apparatus
AssigneeJidosha Kiki Co., Ltd.
InventorsRyuji Ohta, Michio Kobayashi
Life of this patent
Estimating the term…
Abstract
A brake apparatus has an actuator mechanism for bringing a friction member into tight contact with a braking member to generate a braking force, the actuator mechanism comprising: a main actuating unit for moving the friction member to a position where the friction member is in contact with the braking member; a subactuating unit for further urging the friction member which is in contact with the braking member so as to generate the braking force, the subactuating unit being constituted by a piezoceramic element; and a controller for operating the main actuating unit first and then the subactuating unit in accordance with a brake command from a first sensor.
Claims17
A brake apparatus comprising an actuator mechanism for bringing a friction member into tight contact with a braking member to generate a braking force, said actuator mechanism comprising:
- a main actuating unit for moving said friction member to a position where said friction member is in contact with said braking member;
- a subactuating unit for further urging said friction member which is in contact with said braking member so as to generate the braking force, said subactuating unit being constituted by a piezoceramic element;
- and
- a controller for operating said main actuating unit first and then said subactuating unit in accordance with a brake command from a first sensor.
A braking apparatus comprising an actuator mechanism for bringing a friction member into tight contact with a braking member to generate a braking force, said actuator mechanism having a hydraulic cylinder which is operated by a fluid pressure generated upon depression of a brake pedal and which applies a force to said friction member, and a braking piezoceramic element which is arranged in parallel with said hydraulic cylinder and which applies a force to said friction member, said braking piezoceramic element having a rear end held by a holder biased in a direction where said friction member is urged toward said braking member, said holder being provided with locking piezoceramic elements for stopping said holder at a predetermined position.
Dependencies are inferred from the claim text.