Abstract: It is an object of the present invention to control unstable behavior of a vehicle body that arises when braking during turning.

Abstract: A brake control method for a hydraulic brake device equipped with an actuator that automatically regulates braking liquid pressure in a wheel cylinder of a vehicle without driver intervention. The method includes: (a) calculating a time period in which holding or decreasing brake hydraulic pressure is continuously performed to the wheel cylinder; and (b) controlling the actuator such that, an increasing pressure and decreasing pressure to the wheel cylinder after the calculated time period has reached a predetermined time, the amount of the pressure increase and the amount of the pressure decrease are the same.

Abstract: 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.

Abstract: A brake control device for a brake system. The control device can perform both an interlocking brake control and an antilock brake control. The brake system includes a front-wheel hydraulic circuit, a front-wheel-side braking part; a rear-wheel hydraulic circuit, a rear-wheel-side braking part; and an electrically-operated pump which pressurizes the brake fluid. The brake control device includes a usual voltage mode where the interlocking brake control or the anti-lock brake control is performed when the supply voltage is a first voltage or more, and a low voltage mode where at least one of the interlocking brake control and the anti-lock brake control is performed in a limited manner when the supplied voltage is a second, lower voltage. An operation mode is changed from the usual voltage mode to the low voltage mode when it is determined that the supply voltage becomes lower than the first voltage.

Abstract: To reliably prevent re-lifting of a rear wheel immediately after landing of the rear wheel. When it is determined that output of a detection signal corresponding to detection of lifting of a rear wheel has ended (S102), brake pressure—and specifically a pressure increase gradient of a wheel cylinder pressure of a front wheel—is reduced, and the pressure increase gradient that has been reduced is maintained until it is determined that vehicle body deceleration has fallen below a predetermined value K1 (S108, S110), whereby re-lifting of the rear wheel caused by an increase in brake pressure at a high pressure increase gradient after landing of the rear wheel can be reliably prevented.

Abstract: A motorcycle comprises an electricity accumulator configured to supply electric power to driving devices required for driving of the motorcycle and to non-driving devices; a voltage detector configured to detect a voltage of the electricity accumulator; and a power supply controller configured to control supply of the electric power; the non-driving devices including electric motor devices in an electric motor braking system configured to be electrically driven to assist braking and non-driving electric motor devices other than the electric motor devices in the electric motor braking system; and the power supply controller being configured to inhibit the electric power from being supplied to at least one specified non-driving electric motor device of the non-driving electric motor devices, when the voltage of the electricity accumulator which is detected by the voltage detector is not more than a first predetermined voltage.

Abstract: To provide an ABS control system and software with an automatic parameter calibration function. An ABS control system according to the present invention includes an electronic control unit (ECU), a wheel speed sensor, and a brake pressure sensor. The wheel speed sensor and the brake pressure sensor measure wheel speed and brake pressure during ABS braking, and the ABS control system automatically calibrates an internal parameter used in ABS control in response to the wheel speed and brake pressure measurement results.

Abstract: To reliably prevent re-lifting of a rear wheel immediately after landing of the rear wheel. When it is determined that output of a detection signal corresponding to detection of lifting of a rear wheel has ended (S102), brake pressure—and specifically a pressure increase gradient of a wheel cylinder pressure of a front wheel—is reduced, and the pressure increase gradient that has been reduced is maintained until it is determined that vehicle body deceleration has fallen below a predetermined value K1 (S108, S110), whereby re-lifting of the rear wheel caused by an increase in brake pressure at a high pressure increase gradient after landing of the rear wheel can be reliably prevented.