| 摘要 |
<p>A brake control device for generating brake fluid pressure using an electric motor, wherein, in order to control changes in the vehicle deceleration relative to the amount by which a brake pedal is operated during a fluid pressure sensor abnormality, a controller (6) sets a target fluid pressure for a master cylinder (2) on the basis of the amount by which a brake pedal (11) is operated as detected by a stroke sensor (36), and controls the action of an electric motor (14) such that the master cylinder fluid pressure detected by the fluid pressure sensor (10) reaches the target fluid pressure. At such a time, a brake property indicative of the relationship between the motor rotational position as detected by a resolver (37) and the master cylinder fluid pressure as detected by the fluid pressure sensor (10) is stored and updated. During an abnormality from the fluid pressure sensor (10), a target motor rotational position corresponding to the target fluid pressure is set using the updated brake property, and the action of the electric motor (14) is controlled. Because the electric motor (14) is controlled on the basis of the updated brake property, fluctuations in the vehicle deceleration relative to the brake operation can be suppressed and a sense of discomfort for the driver can be alleviated.</p> |
