A hydraulic pressure control unit (1) for a brake system mounted to a straddle-type vehicle includes a housing (40) that accommodates a circuit board (31). The housing (40) includes: a main body (41) formed with an opening (43a) in a region opposing the circuit board (31); a lid (48) that covers the opening (43a) and adheres to the main body (41); and a lid fixing section (50) provided in a space surrounded by the main body (41) and the lid (48) and fixing the lid (48) to the main body (41). The lid fixing section (50) includes: an engaged section (51) held by one of the main body (41) and the lid (48); and an engaging section (55) that is held by the other of the main body (41) and the lid (48) and engages with the engaged section (51).

A motorcycle braking arrangement comprising a brake lever (and/or brake pedal) defining a grasping or stepping surface, respectively, whereby a rider is able to apply pressure in order to produce a first analogue signal, a force-sensitive resistor (FSR) mounted on and/or in the surface and configured to produce a second analogue signal. In this manner, pressure applied to the grasping surface results in simultaneous production of the first and second signals, whereby a controller is configured to electronically correlate the second signal with the first. The arrangement also includes at least one servomechanism, which is arranged in signal communication with the controller and is configured to actuate a brake of the motorcycle according to the correlation between the first and second signals.

A vehicle brake control device including a wheel speed acquisition section, a wheel acceleration calculation section, an anti-lock brake control section, a bad road determination section, and a bad road amount setting section. The wheel acceleration calculation section calculates a first wheel acceleration and a second wheel acceleration. The bad road determination section determines that a running road surface is a bad road when the calculated first wheel acceleration is larger than a first boundary line where the first wheel acceleration increases as the second wheel acceleration is larger in an area where the first wheel acceleration is larger than the second wheel acceleration. The bad road amount setting section increases a bad road amount as the calculated first wheel acceleration is larger when it is determined that a running road surface is a bad road.

A method to determine a roll angle (λ.sub.E) of a vehicle, wherein the roll angle (λ.sub.E) is calculated as a combination of at least a first roll angle variable (λ.sub.1) and a second roll angle variable (λ.sub.2), wherein the first roll angle variable (λ.sub.1) is determined from an acquired rolling rate ({dot over (λ)}.sub.m) of the vehicle using a first method, wherein the second roll angle variable (λ.sub.2) is determined from one or more further vehicle movement dynamics characteristic variables using a second method.

The invention obtains a controller and a control method capable of appropriately assisting with an operation by a driver while preventing a motorcycle from falling over. In the controller and the control method according to the invention, in a control mode to make the motorcycle perform an automatic cruise deceleration operation, automatic deceleration that is deceleration of the motorcycle generated by the automatic cruise deceleration operation is controlled in accordance with a lean angle of the motorcycle.

The invention obtains a controller and a control method capable of improving safety by an automatic deceleration operation while preventing a motorcycle from falling over. The invention also obtains a brake system that includes such a controller. In the controller, the control method, and the brake system according to the invention, a control mode is initiated in response to trigger information that is generated in accordance with peripheral environment of the motorcycle, and the control mode makes the motorcycle, which includes a damping device damping kinetic energy, execute the automatic deceleration operation. In the control mode, the automatic deceleration operation is executed in a state where a damping rate of the damping device is increased to be higher than that immediately before initiation of the control mode.

The invention obtains a controller and a control method capable of appropriately assisting with an operation by a driver while preventing a motorcycle from falling over. In the controller and the control method according to the invention, in a control mode to make the motorcycle perform an automatic cruise deceleration operation, automatic deceleration that is deceleration of the motorcycle generated by the automatic cruise deceleration operation is controlled in accordance with a change rate of a state amount that is related to posture of the motorcycle during turning travel.

The present invention obtains a control system and a control method capable of appropriately executing slip suppression control for a straddle-type vehicle.

In the control system and the control method according to the present invention, a damping characteristic of a suspension is controlled. In addition, a damping force to be generated to the suspension is estimated on the basis of the damping characteristic and a stroke speed of the suspension, and the slip suppression control for suppressing slippage of the straddle-type vehicle is executed by using a target amount corresponding to the estimated damping force.

A driving support system (1) for motorcycles including: an external sensor unit (2) which recognizes a road state ahead of one's own vehicle; a collision risk determination unit (62) which determines a level of collision risk between one's own vehicle and an object ahead of one's own vehicle based on a recognition result of the external sensor unit 2; an automatic braking control unit (61) which executes automatic braking to automatically operate a brake device (83) in response to the determination result by the collision risk determination unit (62); and a departure risk determination unit (64) which determines a level of departure risk of one's own vehicle to outside of one's own vehicle travel lane in a case of executing the automatic braking. The automatic braking control unit (61) ends execution of the automatic braking in a case of being determined that the departure risk is high.

Assembly (1) comprising at least one vehicle wheel (2), adapted to rotate about a vehicle wheel axis (X2) and adapted to perform a rolling movement on an advancement surface for the vehicle; at least one further rotating member (4), which can be operatively connected to said vehicle wheel (2); at least one transmission (6) adapted to transmit kinetic power between said vehicle wheel (2) and said at least one further rotating member (4); wherein said transmission (6) achieves a transmission ratio other than +1; at least one braking device (18) acting on said at least one further rotating member (4) in order to brake said vehicle wheel (2) by means of a braking action acting on said at least one further rotating member (4) which is transmitted to the vehicle wheel (2) by means of said transmission (6)