Brake control device for vehicle

A brake control device for a vehicle applied to a brake device configured to adjust a front-wheel braking force that is a braking force applied to a front wheel of the vehicle and a rear-wheel braking force that is a braking force applied to a rear wheel of the vehicle, the brake control device for the vehicle comprising:

• a ratio calculation circuit that calculates a target front and rear braking force distribution ratio that is a target value of a front and rear braking force distribution ratio based on a target pitch angle, the front and rear braking force distribution ratio is a ratio of the rear-wheel braking force with respect to the front-wheel braking force, and the target pitch angle is a target value of a pitch angle of the vehicle during braking;
• and,
• a brake control circuit that performs a stability control by operating the brake device based on front and rear braking force distribution ratio during braking, wherein
• in the stability control, the brake control circuit operates the brake device to hold the front and rear braking force distribution ratio at the target front and rear braking force distribution ratio even when a vehicle body deceleration of the vehicle changes,
• the brake control circuit performs a stable control that lowers the front and rear braking force distribution ratio less than the target front and rear braking force distribution ratio by operating the brake device if the vehicle body deceleration of the vehicle is larger than a switching deceleration during braking, and
• an ideal front and rear braking force distribution ratio that is the front and rear braking force distribution ratio at which the front wheel and the rear wheel are simultaneously locked,
• in a graph in which one of a vertical axis and a horizontal axis indicates the front-wheel braking force and the other indicates the rear-wheel braking force, the switching deceleration is set to a value corresponding to a vehicle body deceleration of the vehicle when a line representing a relationship between the target front and rear braking force distribution ratio and the vehicle body deceleration of the vehicle, and a line representing a relationship between the ideal front and rear braking force distribution ratio and the vehicle body deceleration of the vehicle intersect.