Abstract: The invention obtains a controller and a control method capable of improving operability of a straddle-type vehicle. In a controller 20 and a control method according to the invention, an execution section of the controller 20 executes a control mode in which vehicle speed control is enabled in response to a first trigger and the vehicle speed control is disabled in response to a second trigger. In the vehicle speed control, a vehicle speed of a straddle-type vehicle 1 is controlled on the basis of a target vehicle speed in the case where it is determined that the straddle-type vehicle 1 travels on a downhill road.

Abstract: The present invention obtains a controller and a control method capable of appropriately emitting an emergency braking signal in a straddle-type vehicle. A controller (60) and the control method according to the present invention control operation of a straddle-type vehicle (100) in which anti-lock brake control for a front wheel (3) and anti-lock brake control for a rear wheel (4) are executed. An acquisition section of the controller (60) acquires an anti-lock brake actuation state showing whether the anti-lock brake control is actuated for any of the wheels (3, 4). A determination section of the controller (60) determines a threshold value on the basis of the anti-lock brake actuation state. An output section of the controller (60) outputs an emergency braking signal command in the case where deceleration of the straddle-type vehicle (100) is higher than the threshold value.

Abstract: The present invention obtains a vehicle brake system capable of suppressing a cost increase. A vehicle brake system 10 according to the present invention is a vehicle brake system 10 including: a hydraulic pressure control unit 6 controlling a braking force generated to a vehicle 1; a first master chamber (first master cylinder 21a) that is a master chamber for a front wheel 2 and at least communicates with a wheel cylinder 24 of the front wheel 2 of the vehicle 1; and a second master chamber (second master cylinder 21b) that is a master chamber for a rear wheel 3 and at least communicates with a wheel cylinder 26 of the rear wheel 3 of the vehicle 1.

Abstract: A controller and a control method capable of appropriately stabilizing behavior of a rear wheel of a straddle-type vehicle. In the controller and the control method, a slip amount of a wheel of a straddle-type vehicle is controlled to be equal to or smaller than an allowable slip amount. In the case where it is determined that behavior of a rear wheel of the straddle-type vehicle is in an unstable state on the basis of a slip angle of the straddle-type vehicle, stabilization control is executed to reduce the allowable slip amount of the rear wheel to be smaller than the allowable slip amount of the rear wheel at the time when it is determined that the behavior of the rear wheel is in the stable state.

Abstract: The present invention obtains a controller and a control method capable of appropriately emitting an emergency braking signal in a straddle-type vehicle. A controller (60) and the control method according to the present invention control operation of a straddle-type vehicle (100) in which anti-lock brake control for a front wheel (3) and anti-lock brake control for a rear wheel (4) are executed. An acquisition section of the controller (60) acquires an anti-lock brake actuation state showing whether the anti-lock brake control is actuated for any of the wheels (3, 4). A determination section of the controller (60) determines a threshold value on the basis of the anti-lock brake actuation state. An output section of the controller (60) outputs an emergency braking signal command in the case where deceleration of the straddle-type vehicle (100) is higher than the threshold value.

Abstract: The present invention obtains a controller and a control method capable of appropriately stabilizing behavior of a rear wheel of a straddle-type vehicle. In the controller and the control method according to the present invention, a slip amount of a wheel of a straddle-type vehicle (100) is controlled to be equal to or smaller than an allowable slip amount. In the case where it is determined that behavior of a rear wheel (4) of the straddle-type vehicle (100) is in an unstable state on the basis of a slip angle (?1) of the straddle-type vehicle (100), stabilization control is executed to reduce the allowable slip amount of the rear wheel (4) to be smaller than the allowable slip amount of the rear wheel (4) at the time when it is determined that the behavior of the rear wheel (4) is in the stable state.

Abstract: A controller and a control method of a motorcycle brake system including a brake operator, a wheel braking assembly, and a controller. The controller is configured to perform a lean angle obtainment step during turning, and perform a positive gradient setting step. The positive gradient corresponds to the lean angle obtained. The controller is also configured to initiate a braking force suppression operation in states where the motorcycle makes a turn and increases input to the brake operator. This operation is executed to increase braking force generated by the wheel braking assembly in a smaller positive gradient of hydraulic pressure in a wheel cylinder than a positive gradient of hydraulic pressure in a master cylinder when the braking force on the wheel depends only on the input to the brake operator. The braking force suppression operation is initiated in the positive gradient when an initiation reference is satisfied.

Abstract: A controller and a control method of a brake system for a motorcycle are obtained, the controller and the control method capable of improving behavior stability of a motorcycle at a time when a road surface is a steep upward slope. The invention also obtains a brake system for a motorcycle that includes such a controller. In the controller and the control method of the brake system for a motorcycle and in the brake system for a motorcycle according to the invention, in the cases where it is determined that a user's operation of a first brake operation section 11 is present and it is determined that the motorcycle 100 is in a slip-down state where the motorcycle travels backward while a front wheel 3 is braked when the road surface is the upward slope, an emergency braking action that causes a rear-wheel brake mechanism 14 to generate a braking force that brakes a rear wheel 4 is executed.

Abstract: To provide braking-force control capable of suppressing a wheelie of a two-wheeled vehicle by changing braking-force distribution. In a method for controlling a braking force of a combined brake system for the two-wheeled vehicle, a lean angle of a two-wheeled vehicle 1 is detected or computed, and, in the case where the lean angle exceeds a specified value, braking-force distribution to front and rear brake devices 11f, 11r is changed.

Abstract: To provide braking-force control capable of suppressing a wheelie of a two-wheeled vehicle by changing braking-force distribution. In a method for controlling a braking force of a combined brake system for the two-wheeled vehicle, a lean angle of a two-wheeled vehicle 1 is detected or computed, and, in the case where the lean angle exceeds a specified value, braking-force distribution to front and rear brake devices 11f, 11r is changed.

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

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: 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 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: 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.