| 摘要 |
PROBLEM TO BE SOLVED: To provide an electrically-driven braking device that can accurately determine a reference position as a position where a friction member (for example, a brake pad) begins to come into contact with a rotary member (for example, a brake disk).SOLUTION: When a braking manipulated variable is decreased, a position data group (Mka(t)) as to an actual position (Mka) of an electric motor and a pressing force data group (Fba(t)) as to actual pressing force are stored in sequence from "a start point as one end point of a storage section including an ineffective displacement section where the actual position decreases, but the actual pressing force (Fba) does not decreases" to "an end position as the other end point of the storage section". On the basis of the position data group and the pressing force data group, a reference position (pzr) where a friction member and a rotary member begin to come into contact with each other is determined. On the basis of the reference position, a target amount of electric power supply to the electric motor is computed. |
