Brake device

A brake device, comprising:

• brake mechanisms respectively provided to wheels of a vehicle to perform braking based on an operation of a brake pedal;
• braked-state retention mechanisms provided to at least one pair of right and left brake mechanisms of the brake mechanisms, for bringing the wheels into a braked state by driving electric motors and for retaining the braked state;
• and
• control means for performing switching between allowance and inhibition of control of the electric motors in response to an actuation request signal to store one of a retained state and a released state achieved by each of the braked-state retention mechanisms and to detect a failure of at least one of the braked-state retention mechanisms,
• wherein, when the braked-state retention mechanism of one of at least the pair of the brake mechanisms is faulty and a state of the braked-state retention mechanism of the faulty brake mechanism is stored as the released state, the control means achieves a state in which braked-state release actuation of the corresponding electric motor in response to a release actuation request signal to the braked-state retention mechanism of another brake mechanism of at least the pair of brake mechanisms is allowed to be controlled.

A brake device, comprising:

• at least a pair of brake mechanisms for each thrusting a friction member with use of a pressing member based on an operation of a brake pedal, the friction members being provided so as to be abuttable against rotary members which rotate with at least a pair of wheels of a vehicle;
• pressing-member retention mechanisms for thrusting the pressing members of the respective brake mechanisms by electric motors to retain the thrust pressing members;
• and
• control means for performing switching between allowance and inhibition of control of the electric motors in response to an actuation request signal to store one of a retained state and a released state of the pressing members by the respective pressing-member retention mechanisms and to detect a failure of at least one of the pressing-member retention mechanisms,
• wherein, when the pressing-member retention mechanism of one of at least the pair of brake mechanisms is faulty and a state of the pressing-member retention mechanism of the faulty brake mechanism is stored as the released state, the control means achieves a state in which pressing-member release actuation by the corresponding electric motor in response to a release actuation request signal to the pressing-member retention mechanism of another brake mechanism of at least the pair of brake mechanisms is allowed to be controlled, and
• wherein, when the state of the pressing-member retention mechanism of the faulty brake mechanism is stored as the retained state, the control means achieves a state in which the control for the pressing-member release actuation by the corresponding electric motor in response to the release actuation request signal to the pressing-member retention mechanism of the another brake mechanism of at least the pair of brake mechanisms is inhibited.