A vehicle brake system comprises an input device (21) attached to a bulkhead (15) separating a power unit room and a passenger compartment of the vehicle from each other, and including a part extending into the power unit room. A free end of the part of the input device extending into the power unit room is fitted with a protective member (70) defining a slanted surface (70a) opposing the power unit and slanting rearward as one moves in a prescribed lateral direction so that the input device is protected from a frontal impact. In particular, the slanted surface aligns with a corner part (83a) of the power unit (83).

An ABS disposition structure of a saddle riding vehicle includes a head pipe, a main frame, a pair of left and right center frames extending downward from a rear section of the main frame and having a pivot section by which a front end portion of a swing arm is pivotably supported, a cushion disposed at a center in a vehicle width direction, and an ABS modulator configured to perform ABS control, wherein, when seen in a side view, a central axis of the cushion is disposed to be offset from a center frame in a forward and rearward direction, and the ABS modulator is disposed between the cushion and the center frame in a vehicle width direction.

One embodiment provides a saddle-ride type vehicle. The vehicle includes a main frame; a drive source supported by a lower side of the main frame; an energy storing part supported by an upper side of the main frame; a front wheel steerably supported via a front fork mounted on a front side of the main frame; a rear wheel supported via a swing arm mounted on a rear side of the main frame and configured to be driven by the drive source; and seat frames disposed on the rear side of the main frame to support a riding seat. A braking control device is disposed within a lateral width between the seat frames, and is supported by a rear fender supported by the seat frame via a vibration control member. And, an inertia measuring device is supported by the braking control device.

A brake apparatus is provided which has applicability to a wide range of vehicles. The brake apparatus includes a master cylinder provided in such a manner that a piston is axially operable in a master cylinder housing, and a stroke simulator including a reaction force piston axially operable by brake fluid introduced into a stroke simulator housing. The master cylinder housing is fixed to the stroke simulator housing. The stroke simulator housing is positioned between the master cylinder housing and a fixation piece structured to fix the stroke simulator housing to the vehicle. The fixation piece is spaced from the master cylinder housing.

An off-road vehicle has two front wheels and two rear wheels, the rear wheels being connected to a spool gear driven by a motor. The vehicle also has a left front brake, a right front brake and a single rear brake. Speeds of left and right front wheels are respectively monitored by left and right front speed sensors. A single sensor monitors a common speed of left and right rear wheels. Two user actuated braking input devices, for example a hand lever and a foot lever, may be used independently or concurrently to provide a braking command. An anti-lock braking system may use speed measurements from the various speed sensors to control selective application of pressure on the left front brake, the right front brake and the rear brake.

A vehicle has a frame, a straddle seat, front right and left wheels, a rear wheel, a steering assembly, a motor, front right and left brakes, a rear brake, and an electronic brake control unit. The electronic brake control unit has a pump, a valve box, a first pressure sensor disposed in the valve box and an electronic controller. The electronic controller is electronically connected to the pump, and valves of the valve box for controlling their operation. A hand brake lever actuates a first master cylinder and thereby actuates the front brakes through the valve box. A foot brake lever actuates a second master cylinder and thereby actuates the rear brake through the valve box. A second pressure sensor is disposed externally of the valve box. The first and second pressure sensors sensing fluid pressure applied by the first and second master cylinders respectively.

A motorcycle includes: a front frame configured by connecting a head pipe, frame, down frame, and lower frame in a loop shape; rear frame; engine disposed inside the front frame; an air cleaner disposed inside the rear frame; suction pipe and fuel supply device connected to the air cleaner and supply gas to the engine; an ABS module controlling locking of wheels at the time of braking; and cross member bridged between the right and left main frames at the rear portion of the front frame, wherein the suction pipe and the fuel supply device are provided to pass on the upper side of the cross member; and the ABS module is disposed below the suction pipe and the fuel supply device, behind a cylinder assembly of the engine, and above the rear portion of the crankcase.

A brake fluid pressure control unit that can improve cost performance of a brake system is obtained. A brake system that includes such a brake fluid pressure control unit and a motorcycle are also obtained.

A brake fluid pressure control unit 50 includes: an inlet valve 21 provided in a primary channel 14; an outlet valve 22 provided in a secondary channel 15; a pressurizing/transferring mechanism 25 provided on a downstream side of the outlet valve 22 in the secondary channel 15 and pressurizing and transferring a brake fluid in the secondary channel 15; and a controller 51 for executing a fluid pressure control operation of the brake fluid in a wheel cylinder 13, and a power source of the pressurizing/transferring mechanism 25 is a drive mechanism 103 of the motorcycle 100, the drive mechanism 103 being driven in a state where the fluid pressure control operation by the controller 51 is not executed.

A brake apparatus improved in mountability on a vehicle is provided. The apparatus includes a master cylinder 4 that generates hydraulic brake pressure by a driver's brake operation, and a stroke simulator 5 that creates an artificial operation reaction force of a brake operation member when the brake fluid flown out of the master cylinder 4 enters the stroke simulator 5. The master cylinder 4 and the stroke simulator 5 are integrally arranged to overlap each other in a perpendicular direction (as viewed from the perpendicular direction) when installed in the vehicle.

Disclosed is a solenoid valve for a brake system. The solenoid valve comprises an armature disposed inside a sleeve to open and close an orifice formed in a seat by moving up and down along an axial direction together with a plunger; an elastic member for providing an elastic force to the armature; a magnet core accommodating the seat therein and providing a driving force to the armature in a direction opposite to the elastic force of the elastic member; a seal stopper coupled to a lower side of the magnet core so as to communicate with the orifice and having a slot on an outer circumferential surface thereof to allow the flow of a fluid through the slot; an outlet filter forming an outer flow passage with the seal stopper; an inlet filter coupled to a lower side of the seal stopper; a lip seal fitted between the seal stopper and the inlet filter and having an inclined protruding portion to allow only one-way flow of the fluid; an orifice flow passage opened and closed by the up and down movement of the armature; and a one-way flow passage formed to include a mesh portion of the outlet filter, a gap formed between a modulator block and the lip seal due to a deformation of the lip seal, and a mesh portion of the inlet filter, wherein the inlet filter includes a protruding portion inclined outwardly so as to have a chamber therein, and the lip seal is provided so that the inside thereof can be inserted into the chamber.