BRAKING FORCE CONTROL APPARATUS FOR VEHICLE

摘要

An electronic control unit of a braking force control apparatus for a vehicle activates, as a first state, in-wheel motors in a regeneration state, thereby generating motor braking torques, and causes friction brake mechanisms to generate friction braking forces. Moreover, the unit activates, as a second state, the motors in a power running state, thereby generating motor driving torques, and causes the mechanisms to generate friction braking forces. Then, when the state is caused to transition between the first state and the second state, the unit changes magnitudes of the braking torques or the driving torques generated by the motors to one of increase and decrease, and changes magnitudes of the friction braking forces generated by the mechanisms to one of increase and decrease.

主权项

1. A braking force control apparatus for a vehicle, comprising:
an electromotive force generation mechanism for generating, independently on a wheel of a vehicle, an electromagnetic driving force or an electromagnetic braking force; a braking force generation mechanism for generating a mechanical braking force on the wheel rotated by at least the electromagnetic driving force generated by the electromotive force generation mechanism; and braking control means for controlling activations of the electromotive force generation mechanism and the braking force generation mechanism so as to generate a braking force on the wheel, and for activating, when the wheel tends to be locked, the electromotive force generation mechanism in any one of a power running state and a regeneration state so as to generate the electromagnetic driving force or the electromagnetic braking force, and, simultaneously, controlling the braking force generation mechanism to generate the mechanical braking force, wherein: the braking control means controls generation of the braking force on the wheel in: a first state where the electromotive force generation mechanism is activated in the regeneration state so as to generate the electromagnetic braking force having a predetermined magnitude, and, simultaneously, the braking force generation mechanism is controlled to generate the mechanical braking force having a predetermined magnitude, thereby activating the electromotive force generation mechanism and the braking force generation mechanism in cooperation with each other; and a second state where the electromotive force generation mechanism is activated in the power running state so as to generate the electromagnetic driving force having a predetermined magnitude, and, simultaneously, the braking force generation mechanism is controlled to generate the mechanical braking force having a predetermined magnitude, thereby activating the electromotive force generation mechanism and the braking force generation mechanism in cooperation with each other; and when a state is caused to transition from one of the first state and the second state to another of the first state and the second state, a magnitude of the electromagnetic braking force or a magnitude of the electromagnetic driving force generated by the electromotive force generation mechanism is changed to one of increase and decrease, and a magnitude of the mechanical braking force generated by the braking force generation mechanism is changed to one of increase and decrease.