초록 ▼

A brake control method. During ABS control, a control sequence, other than the conventional control sequence, based on the slip ratio and so forth resulting from the measurement value of a wheel speed sensor, and a minimum amount of pressure increase or a minimum amount of pressure decrease is ensur

A brake control method. During ABS control, a control sequence, other than the conventional control sequence, based on the slip ratio and so forth resulting from the measurement value of a wheel speed sensor, and a minimum amount of pressure increase or a minimum amount of pressure decrease is ensured. In another embodiment, a control sequence independent from a control sequence based on the measurement value of a wheel speed sensor, sets allowable ranges relating to amounts of change in the pressure of a wheel cylinder, monitors the actual pressure value with a pressure sensor at the time of brake control, and, at a time when the pressure inside the wheel cylinder has deviated from these allowable ranges, drives an actuator such as an electromagnetic valve and controls in such a way that the pressure inside the wheel cylinder falls within an allowable range.

대표청구항 ▼

1. A vehicle brake control method, the method comprising: measuring a pressure P01 inside the wheel cylinder at a time when the wheel lock tendency has been detected,measuring a pressure Pt1 inside a wheel cylinder at a time when a predetermined amount of time t1 has elapsed after a time when a whee

1. A vehicle brake control method, the method comprising: measuring a pressure P01 inside the wheel cylinder at a time when the wheel lock tendency has been detected,measuring a pressure Pt1 inside a wheel cylinder at a time when a predetermined amount of time t1 has elapsed after a time when a wheel lock tendency has been detected;determining a value Pmax_t1, expressed by Pmax_t1=P01−ΔPt1, with ΔPt1 being a value that is decided beforehand in accordance with the amount of time t1;comparing, by a controller, Pt1 with the predetermined value Pmax_t1; andin a case where a condition of Pt1>Pmax_t1 is met in comparing Pt1 with the predetermined value Pmax_t1, the controller driving by a predetermined amount an actuator for decreasing the pressure in the wheel cylinder so as to decrease the pressure inside the wheel cylinder. 2. The method according to claim 1 wherein the predetermined drive amount of the actuator is a fixed amount that is not changed during driving of the vehicle. 3. A vehicle brake control method, the method comprising: measuring a pressure P01 inside the wheel cylinder at a time when a wheel lock tendency has been detected;measuring a pressure P02 inside the wheel cylinder at a time when the wheel lock tendency has been eliminated by decreasing the pressure inside the wheel cylinder;measuring a pressure Pt2 inside a wheel cylinder at a time when a predetermined amount of time t2 has elapsed after a time when a wheel lock tendency has been detected and the wheel lock tendency has been eliminated as a result of decreasing the pressure inside the wheel cylinder;comparing, by a controller, Pt2 with a predetermined value Pmin_t2; andin a case where a condition of Pt2Pmax_t1 is satisfied, drives the actuator by a predetermined amount so as to decrease the pressure inside the wheel cylinder,wherein Pmax_t1 is expressed by Pmax_t1=P01−ΔPt1, with ΔPt1 being a value that is decided beforehand in accordance with the amount of time t1. 6. The vehicle brake control device according to claim 5, wherein the predetermined drive amount of the actuator is a fixed amount that is not changed during driving of the vehicle. 7. A vehicle brake control device comprising: a pressure sensor for measuring pressure that has been applied to a wheel cylinder;a wheel speed sensor that is used for detecting a wheel lock tendency;an actuator for controlling the pressure inside the wheel cylinder; anda controller electrically connected to the pressure sensor, the wheel speed sensor, and the actuator,wherein the controller receives from the pressure sensor a pressure P01 inside the wheel cylinder at a time when a wheel lock tendency has been detected by the wheel speed sensor,the controller further receives from the pressure sensor a pressure P02 inside the wheel cylinder at a time when the wheel lock tendency has been eliminated by decreasing the pressure inside the wheel cylinder, andthe controller further receives from the pressure sensor a pressure Pt2 inside the wheel cylinder at a time when a predetermined amount of time t2 has elapsed after a time when a wheel lock tendency has been detected by the wheel speed sensor and the wheel lock tendency has been eliminated as a result of decreasing the pressure inside the wheel cylinder, compares Pt2 with a predetermined value Pmin_t2, and, in a case where a condition of Pt2