Vehicular brake control apparatus and control method of vehicular brake apparatus

A vehicular brake control apparatus comprising:

• a braked member that rotates together with a wheel;
• a braking member that produces a braking torque when pressed against the braked member;
• an electric driving device that presses the braking member against the braked member to apply a braking torque to the wheel, when being supplied with electric current;
• and
• current supplying means for supplying electrical current to the electrical driving device;
• characterized by comprising
• operational state detecting means for detecting an operational state of the vehicle and providing a quantity of state representative of the operational state of the vehicle;
• current controlling means for controlling the supply of electric current to the electric driving device so that the supply of a predetermined electric current to the electric driving device is started if a, requested quantity of change in the braking torque based on the quantity of state becomes greater than a predetermined value.

A vehicular brake control apparatus comprising:

• a braked member that rotates together with a wheel;
• a braking member that produces a braking torque when pressed against the braked member;
• an electric driving device that presses the braking member against the braked member by a predetermined pressurizing force to apply a braking torque to the wheel, when being supplied with electric current;
• and
• current supplying means for supplying electrical current to the electrical driving device;
• characterized by comprising
• slip rate detecting means for detecting a slip rate of the wheel;
• wherein
• the current controlling means controls the supply of electric current to the electric driving device so that a changing rate of the pressurizing force is changed in accordance with the slip rate.

A control method of a vehicular brake apparatus having:

• a braked member that rotates together with a wheel;
• a braking member that produces a braking torque when pressed against the braked member;
• an electric driving device that presses the braking member against the braked member by driving in a predetermined direction so as to apply a braking torque to the wheel, when being supplied with electric current;
• comprising the steps of:
• detecting an operational state of the vehicle;
• providing a quantity of state representative of the operational state of the vehicle;
• determining selectively whether the braking torque is to be increased and is to be reduced, based upon the quantity of state;
• and
• controlling the supply of electrical current to the electric driving device so that the electric driving device is caused to rotate in a predetermined direction if it is determined that the braking torque is to be increased, and so that the electric driving device is caused to reduce the braking torque if it is determined that the braking torque is to be reduced.

A control method of a vehicular brake apparatus having:

• a braked member that rotates together with a wheel;
• a braking member that produces a braking torque when pressed against the braked member;
• and
• an electric driving device that presses the braking member against the braked member by a predetermined pressurizing force to apply a braking torque to the wheel, when being supplied with electric current, characterized by
• comprising the steps of:
• detecting a slip rate of the wheel;
• and
• controlling a supply of electric current to the electric driving device so that a changing rate of the pressurizing force is changed in accordance with the slip rate.

A control method of a vehicular brake apparatus having:

• a braked member that rotates together with a wheel;
• a braking member that produces a braking torque when pressed against the braked member;
• an electric driving device that presses the braking member against the braked member by a predetermined pressurizing force to apply a braking torque to the wheel, when being supplied with electric current,
• comprising the steps of:
• detecting the operational state of the vehicle includes to detect a slip rate of the wheel
• determining whether the slip rate has become greater than a predetermined value, and
• controlling the supply of electric current to the electric driving device so that the electric driving device is caused to rapidly reduce the braking torque and then gently reduce the braking torque, if the slip rate becomes greater than the predetermined value.

A vehicular brake control apparatus comprising:

• a braked member that rotates together with a wheel;
• a braking member that produces a braking torque when pressed against the braked member;
• an electric driving device that presses the braking member against the braked member by driving in a predetermined direction so as to apply a braking torque to the wheel, when being supplied with electric current;
• an operational state detector that detects an operational state of the vehicle and provides a quantity of state representative of the operational state of the vehicle;
• a braking torque change request determiner that selectively determines that the braking torque is to be increased and that the braking torque is to be reduced, based on the quantity of state;
• and
• a current controller that controls the supply of electrical current to the electric driving device so that the electric driving device is caused to drive in a predetermined direction if it is determined that the braking torque is to be increased, and so that the electric driving device does not drive in a the predetermined direction if it is determined that the braking torque is to be reduced.

A vehicular brake control apparatus comprising:

• a braked member that rotates together with a wheel;
• a braking member that produces a braking torque when pressed against the braked member;
• an electric driving device that presses the braking member against the braked member by driving in a predetermined direction so as to apply a braking torque to the wheel, when being supplied with electric current;
• an operational state detector that detects an operational state of the vehicle and provides a quantity of state representative of the operational state of the vehicle;
• a braking torque change request determiner that selectively determines that the braking torque is to be increased and that the braking torque is to be reduced, based on the quantity of state;
• and
• current controller that controls the supply of electrical current to the electric driving device so that the electric driving device is caused to drive in a predetermined direction if it is determined that the braking torque is to be increased, and so that the supply of electrical is discontinued if it is determined that the braking torque is to be reduced.

A vehicular brake control apparatus comprising:

• a braked member that rotates together with a wheel;
• a braking member that produces a braking torque when pressed against the braked member;
• an electric driving device that presses the braking member against the braked member by driving in a predetermined direction so as to apply a braking torque to the wheel, when being supplied with electric current;
• an operational state detector that detects an operational state of the vehicle and provides a quantity of state representative of the operational state of the vehicle;
• a braking torque change request determiner that selectively determines that the braking torque is to be increased and that the braking torque is to be reduced, based on the quantity of state detected;
• and
• a current controller that controls the supply of electrical current to the electric driving device so that the electric driving device is caused to drive in a predetermined direction if it is determined that the braking torque is to be increased, and so that the electric driving device is caused to drive in a direction opposite to the predetermined direction if it is determined that the braking torque is to be reduced.

A vehicular brake control apparatus comprising:

• a braked member that rotates together with a wheel;
• a braking member that produces a braking torque when pressed against the braked member;
• an electric driving device that presses the braking member against the braked member by driving in a predetermined direction so as to apply a braking torque to the wheel, when being supplied with electric current;
• a brake operation detector that detects a brake operation performed by an operating person and provides a quantity of brake operation representative of the brake operation,
• an operational state detector that detects an operational state of the vehicle other than the quantity of brake operation, and
• a current controller that controls the supply of electric current to the electric driving device so that the supply of electrical current is discontinued if it is determined that the braking torque is to be reduced based on the quantity of brake operation, and so that the electric driving device is caused to drive in a direction opposite to the predetermined direction if it is determined that the braking torque is to be reduced based on the quantity of state detected.

A vehicular brake control apparatus comprising:

• a braked member that rotates together with a wheel;
• a braking member that produces a braking torque when pressed against the braked member;
• an electric driving device that presses the braking member against the braked member by driving in a predetermined direction so as to apply a braking torque to the wheel, when being supplied with electric current;
• an operational state detector that detects an operational state of the vehicle and provides a quantity of state representative of the operational state of the vehicle;
• a braking torque change request determiner that selectively determines that the braking torque is to be increased and that the braking torque is to be reduced, based on the quantity of state;
• and
• a current controller that controls the supply of electrical current to the electric driving device so that the electric driving device is caused to drive in a predetermined direction if it is determined that the braking torque is to be increased, and so that the electrical current supplied to the electric driving device is lower than required to drive the electric driving device in a the predetermined direction if it is determined that the braking torque is to be reduced.

A vehicular brake control apparatus comprising:

• a braked member that rotates together with a wheel;
• a braking member that produces a braking torque when pressed against the braked member;
• an electric driving device that presses the braking member against the braked member by driving in a predetermined direction so as to apply a braking torque to the wheel, when being supplied with electric current;
• an operational state detector that detects an operational state of the vehicle and provides a quantity of state representative of the operational state of the vehicle;
• a braking torque change request determiner that selectively determines that the braking torque is to be increased and that the braking torque is to be reduced, based on the quantity of state;
• and
• a current controller that controls the supply of electrical current to the electric driving device so that the electric driving device is caused to drive in a predetermined direction if it is determined that the braking torque is to be increased, and so that electrical current supplied to the electric driving device is insufficient to drive the electric driving device in the predetermined direction if it is determined that the braking torque is to be reduced.

A vehicular brake control apparatus comprising:

• a braked member that rotates together with a wheel;
• a braking member that produces a braking torque when pressed against the braked member;
• an electric driving device that presses the braking member against the braked member to apply a braking torque to the wheel, when being supplied with electric current;
• an operational state detector that detects an operational state of the vehicle and providing a quantity of state representative of the operational state of the vehicle;
• a current controller that controls the supply of electric current to the electric driving device so that the supply of a predetermined electric current to the electric driving device is started if a requested quantity of change in the braking torque based on the quantity of state becomes greater-than a predetermined value.

A vehicular brake control apparatus comprising:

• a braked member that rotates together with a wheel;
• a braking member that produces a braking torque when pressed against the braked member;
• an electric driving device that presses the braking member against the braked member to apply a braking torque to the wheel, when being supplied with electric current;
• an operational state detector that detects an operational state of the vehicle and provides a quantity of state representative of the operational state of the vehicle;
• a current controller that controls the supply of electric current to the electrical driving device so that the electrical driving device is caused to maintain the braking torque if it is determined that the braking torque is to be held at a constant value on the basis of the quantity of state detected.

A vehicular brake control apparatus comprising:

• a braked member that rotates together with a wheel;
• a braking member that produces a braking torque when pressed against the braked member;
• an electric driving device that presses the braking member against the braked member by a predetermined pressurizing force to apply a braking torque to the wheel, when being supplied with electric current;
• a slip rate detector that detects a slip rate of the wheel;
• and
• a current controller that controls the supply of electric current to the electric driving device so that a changing rate of the pressurizing force is changed in accordance with the slip rate.

A vehicular brake control apparatus comprising:

• a braked member that rotates together with a wheel;
• a braking member that produces a braking torque when pressed against the braked member;
• an electric driving device that presses the braking member against the braked member by a predetermined pressurizing force to apply a braking torque to the wheel, when being supplied with electric current;
• a slip rate detector that detects a slip rate of the wheel;
• and
• a current controller that controls the supply of electric current to the electric driving device so that the pressurizing force is rapidly reduced and then is gently reduced, if the slip rate becomes greater than a predetermined value.

A vehicular brake control apparatus comprising:

• a braked member that rotates together with a wheel;
• a braking member that produces a braking torque when pressed against the braked member;
• an electric driving device that presses the braking member against the braked member by a predetermined pressurizing force to apply a braking torque to the wheel, when being supplied with electric current;
• a slip rate detector that detects a slip rate of the wheel;
• and
• a current controller that controls the supply of electric current to the electric driving device so that the pressurizing force is reduced and then is increased and a changing rate of the pressurizing force while the pressurizing force is increased decreases gradually, if the slip rate becomes greater than a predetermined value.

A vehicular brake control apparatus comprising:

• a braked member that rotates together with a wheel;
• a braking member that produces a braking torque when pressed against the braked member;
• an electric driving device that presses the braking member against the braked member by driving in a predetermined direction so as to apply a braking torque to the wheel, when being supplied with electric current;
• an operational state detector that detects an operational state of the vehicle and provides a quantity of state representative of the operational state of the vehicle;
• a braking torque change request determiner that selectively determines that the braking torque is to be increased and that the braking torque is to be reduced, based on the quantity of state;
• and
• a current controller that controls the supply of electrical current to the electric motor so that the electric motor is caused to rotate in a predetermined direction if it is determined that the braking torque is to be increased, and so that the electrical current supplied to the electric motor is lower than required to rotate the electric motor in a the predetermined direction if it is determined that the braking torque is to be reduced.