Honda Giken Kogyo Kabushiki Kaisha

Yukimasa Nishimoto

Kanau Iwashita

Tetsuo Tsuchida

Takao Yoshida

Kazuaki Fukami

Masaru Sasaguchi

Nakano Yasuo

A brake apparatus for motorcycles with a master cylinder connected directly to a front wheel brake cylinder and connected through pressure control valves to a rear wheel brake cylinder. An adjustment varies the ratios of application of pressures to front and rear brakes through variation in valve spring settings to accommodate variations in load. A sensing system may be employed to determine application of braking force to the front wheel. This system may take the form of a mechanical servo mounting the front brake calipers, a direct pressure application in the master cylinder or a transducer measuring brake pressure to the front wheel. When braking to the front wheel is sensed above a selected threshold, the ratio of brake pressure of the front to rear wheels is reduced. A orifice restriction associated with the pressure control valves reduces sensitivity to variation in braking due to valve action.

Motorcycle brake system having dual master cylinder proportioning

To prevent local abrasion of a lining of a brake pad when one of a plurality of pistons for pressing the lining against a disk plate is rendered operative, a lining 16b mounted on a back plate 16a of a brake pad 16 is separated into two, and a recessed portion 26 or a gap is formed between the two linings 16b in a corresponding relationship to the position of a central one 21 of three pistons 20, 21 and 22. When the central piston 21 is rendered operative, the operating force of the piston 21 is dispersed to the left and right by the recessed portion 26 or the gap to act upon a disk plate 18, and consequently, local abrasion of the lining 16b is prevented.

Disk brake apparatus for vehicle

A primary brake system operated by either one of a hand operated means and a foot operated system is mounted on one of the front and rear wheels, and a secondary brake system operated in response to the operation of the primary brake system is mounted on the other wheel. Consequently, it is possible to provide a braking-force distribution for the front and rear wheels with a predetermined common characteristic, leading to an improved brake feel. A braking-force control is provided for controlling the braking-force distribution to the front and rear wheels in accordance with the operating forces of a first input operated by the hand operated element and a second input operated by the foot operated element, so that an ideal distribution characteristic falls within a region between a first braking-force distribution characteristic for the front and rear wheels by the hand operated element and a second braking-force distribution characteristic for the wheels by the foot operated element, such region being a braking-force distribution characteristic region at a time when the hand and foot operated elements are operated simultaneously.

Braking system for motorcycle having apportioning control

A disk brake system employing a caliper support bracket pivotally mounted about the axis of a first disk which is coupled with a hydraulic cylinder. The hydraulic cylinder in turn drives a second caliper assembly on a second disk. The hydraulic cylinder driven by the caliper support bracket is aligned with the plane of the disk. A bell crank may be employed in alignment with the disk to couple the caliper support bracket and the hydraulic cylinder together.

Growing community of inventors

Tokyo, Japan

Yukimasa Nishimoto