Bosch Corporation

Tohru Masuno

Hiroaki Atsushi

Makoto Sasaki

Yoshio Tajika

Sirichai Bannasarn

A brake fluid pressure control deviceincludes: a block-shaped housing, front and rear wheel-use flow paths, mounting holes in each side surface of the housing; a pair of front wheel-use switching valve bodiesandthat are mounted in a pair of mounting holesandthat control the pressure of a brake fluid supplied to a front wheel-use wheel cylinder; a pair of rear wheel-use switching valve bodiesandthat are mounted in a pair of mounting holesandthat control the pressure of the brake fluid supplied to a rear wheel-use wheel cylinder; a pressure sensorthat is inserted inside a mounting holein the first side surfaceof the housing; and an electronic control unitthat drives and controls the front wheel-use and rear wheel-use switching valve bodiesto

Brake fluid pressure control device

To improve brake force in front and rear combined brake control, a brake control device includes a front wheel brake caliper having at least two front wheel cylinders, and a rear wheel brake caliper having a rear wheel cylinder. A front wheel brake conduit is disposed between a front wheel master cylinder and one of the front wheel cylinders, and a rear wheel brake conduit is disposed between a rear wheel master cylinder and the rear wheel cylinder. A pressure amplification conduit branches from a first position in the rear wheel brake conduit and merges with the rear wheel brake conduit at a second position downstream of the first position. A combined brake conduit branches from a third position in the rear wheel brake conduit positioned downstream of the first position and is coupled to the other of the front wheel cylinders. A first switch control valve is disposed between the first position and the third position in the rear wheel brake conduit. A second switch control valve in disposed in the pressure amplification conduit. A hydraulic pump is provided in the pressure amplification conduit, and a controlling device is provided that controls the opening and closing of the valves and actuation of the hydraulic pump.

Brake control device for two-wheeled motor vehicle

An object of the invention is to provide a braking control system of a two-wheeled motor vehicle, by which when a front-and-rear-wheel-interlocked brake operates, operation feeling of a brake lever is improved, and consequently more natural operation feeling may be provided. A braking control system of a two-wheeled motor vehicle according to the invention performs front-and-rear-wheel-interlocked braking control that allows a front-wheel brake and a rear-wheel brake to operate in an interlocked manner. The front-wheel brake is configured of a front-wheel first brake and a front-wheel second brake. ECUcontrols a front-wheel hydraulic circuitso that the first brake operates according to the front-and-rear-wheel-interlocked braking control. Furthermore, the ECUcontrols the front-wheel hydraulic circuitso that the front-wheel second brake receives hydraulic pressure caused along with operation of a brake leverduring performing the front-and-rear-wheel-interlocked braking control. Thus, operation feeling of the brake leveris improved.

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Yokohama, Japan

Tohru Masuno