Vehicle braking force control
First Claim
Patent Images
1. A vehicle brake control apparatus comprising:
- a controller to control an actual braking force of a vehicle to achieve a command braking force, the controller being configured, to determine a driver'"'"'s demand braking force corresponding to a driver'"'"'s braking operation of the vehicle;
to calculate a target braking force independent of the driver'"'"'s braking operation, to control the actual braking force of the vehicle in a brake control mode in a predetermined vehicle running state;
to calculate a time rate of change of the target braking force;
to calculate a time rate of change of the demand braking force; and
to calculate the command braking force in the control mode in accordance with the time rate of change of the demand braking force and the time rate of change of the target braking force.
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Abstract
A vehicle brake control apparatus controls an actual braking force of a vehicle to achieve a command braking force in accordance with a driver'"'"'s demand braking force corresponding to a driver'"'"'s braking operation, and a target braking force. A controller is configured to calculate a time rate of change of the target braking force; to calculate a time rate of change of the demand braking force; and to calculate the command braking force in the control mode in accordance with the time rate of change of the demand braking force and the time rate of change of the target braking force.
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Citations
16 Claims
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1. A vehicle brake control apparatus comprising:
a controller to control an actual braking force of a vehicle to achieve a command braking force, the controller being configured, to determine a driver'"'"'s demand braking force corresponding to a driver'"'"'s braking operation of the vehicle;
to calculate a target braking force independent of the driver'"'"'s braking operation, to control the actual braking force of the vehicle in a brake control mode in a predetermined vehicle running state;
to calculate a time rate of change of the target braking force;
to calculate a time rate of change of the demand braking force; and
to calculate the command braking force in the control mode in accordance with the time rate of change of the demand braking force and the time rate of change of the target braking force. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A vehicle brake control process of controlling an actual braking force of a vehicle, the vehicle brake control process comprising:
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controlling the actual braking force of the vehicle to achieve a command braking force;
calculating a driver'"'"'s demand braking force in accordance with a sensed driver'"'"'s brake operation quantity;
calculating a target braking force for an automatic brake control when a predetermined running state is present;
calculating a time rate of change of the demand braking force;
calculating a time rate of change of the target braking force; and
calculating the command braking force in accordance with the time rate of change of the demand braking force, and the time rate of change of the target braking force.
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16. A vehicle brake control apparatus for controlling an actual braking force of a vehicle, the vehicle brake control apparatus comprising:
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means for controlling the actual braking force of the vehicle to achieve a command braking force;
means for calculating a driver'"'"'s demand braking force in accordance with a driver'"'"'s brake operation;
means for calculating a desired target braking force independent of the driver'"'"'s brake operation, to control the actual braking force in a control mode when a predetermined vehicle running state is detected; and
means for calculating the command braking force so that the command braking force is not made smaller than the target braking force, by using a previous value of the command braking force and an increase rate of the demand braking force so as to increase a deceleration of the vehicle in response to an increase of the driver'"'"'s brake operation in the control mode.
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Specification