Patent ID: 8676409
Filing Date: 2014-03-18
Classification: B60T,F16D

Abstract:
1. An electric brake apparatus, comprising: a caliper main body including a pressing member configured to press a brake pad against a disk rotor; an electric motor disposed in the caliper main body and configured to thrust the pressing member; a rotational position detector configured to detect a rotational position of the electric motor; and a controller configured to calculate a supply electric current value used in control of the electric motor from data related to a rigidity characteristic of the caliper based on a pressing force instruction value for a pressing force applied from the pressing member to the brake pad according to a brake instruction signal, the controller comprising a thrust force information calculation unit configured to calculate thrust force information for a thrust force applied to the pressing member based on a supply electric current value supplied to the electric motor, an update unit configured to update the data related to the rigidity characteristic of the caliper based on the thrust force information and the rotational position of the electric motor, when the thrust force calculation unit calculates the thrust force information while the pressing member is pressing the brake pad during one brake operation, and an instruction value change unit configured to change an instruction value converted from the pressing force instruction value to calculate the supply electric current value based on the updated data related to the rigidity characteristic, when the update unit updates the data related to the rigidity characteristic of the caliper.