Vehicle braking force control
First Claim
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1. A vehicle brake control apparatus, comprising:
- a controller configured 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;
wherein the controller is configured;
to calculate the command braking force so that the command braking force remains greater than or equal to the target braking force in the brake control mode in the predetermined vehicle running state, andto increase the command braking force at an increase rate determined by the time rate of change of the demand braking force if the demand braking force is in an increasing state, and the increase rate determined by the time rate of change of the demand braking force is greater than an increase rate determined by 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
12 Claims
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1. A vehicle brake control apparatus, comprising:
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a controller configured 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; wherein the controller is configured; to calculate the command braking force so that the command braking force remains greater than or equal to the target braking force in the brake control mode in the predetermined vehicle running state, and to increase the command braking force at an increase rate determined by the time rate of change of the demand braking force if the demand braking force is in an increasing state, and the increase rate determined by the time rate of change of the demand braking force is greater than an increase rate determined by the time rate of change of the target braking force. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A vehicle brake control apparatus, comprising:
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a controller configured 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; wherein the controller is configured to increase the command braking force at an increase rate which is calculated from the time rate of change of the demand braking force and which is greater than the time rate of change of the target braking force when the demand braking force is increased. - View Dependent Claims (8, 9, 10, 11)
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12. 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; 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; calculating the command braking force so that the command braking force remains greater than or equal to the target braking force in a brake control mode in the predetermined vehicle running state, and increasing the command braking force at an increase rate determined by the time rate of change of the demand braking force if the demand braking force is in an increasing state, and the increase rate determined by the time rate of change of the demand braking force is greater than an increase rate determined by the time rate of change of the target braking force.
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Specification