Vehicle brake control system and method therefor

A brake control system 1 for a vehicle, comprising:

• a first detector that detects a force applied to a braking member of the vehicle by an operator of the vehicle;
• a second detector that detects a displacement amount of the braking member of the vehicle upon application of the force to the braking member;
• and
• a controller that:
• calculates a first target brake control amount on the basis of a first value detected by the first detector;
• calculates a second target brake control amount on the basis of a second value detected by the second detector;
• and
• calculates a final target brake control amount on the basis of the first target brake control amount and the second target brake control amount,
• wherein when one of the values detected by the first detector and the second detector is abnormal, and the other one of values detected by the first detector and the second detector is normal, the controller:
• decreases a degree of contribution of one of the first target brake control amount and the second target brake control amount, which is calculated on the basis of the abnormal value, to the final target brake control amount;
• and
• changes a mode for calculating the other one of the first target brake control amount and the second target brake control amount, which is calculated on the basis of the normal value, so as to reduce an influence of the decrease of the degree of contribution on the final target brake control amount, and the controller changes the mode for calculating the other one of the first and the second target brake control amount calculated on the basis of the normal value such that the decrease in the degree of contribution of one of the first target brake control amount and the second target brake control amount has a reduced influence on a relationship between the force applied to the braking member of the vehicle by the operator of the vehicle and the final target brake control amount.

A method for controlling braking of a vehicle, comprising:

• detecting a force applied to a braking member of the vehicle by an operator;
• detecting a displacement amount of the braking member;
• and
• calculating a first target brake control amount on the basis of a first value corresponding to the detected force applied to the braking member;
• calculating a second target brake control amount on the basis of a second value corresponding to the detected displacement amount of the braking member;
• and
• calculating a final target brake control amount on the basis of the first target brake control amount and the calculated second target brake control amount,
• wherein when one of the detected first and second values is abnormal, and the other one of the detected first and second values is normal, the method further comprising:
• decreasing a degree of contribution of one of the first target brake control amount and the second target brake control amount, which is calculated on the basis of the abnormal value, to the final target brake control amount;
• and
• changing a mode for calculating the other one of the first target brake control amount and the second target brake control amount, which is calculated on the basis of the normal value, so as to reduce an influence of the decrease of the degree of contribution on the final target brake control amount, and
• changing the mode for calculating the other one of the first and the second target brake control amount calculated on the basis of the normal value such that the decrease in the degree of contribution has a reduced influence on a relationship between the force applied to the braking member and the final target brake control amount.