Yamaha Hatsudoki Kabushiki Kaisha

Nsk-warner K.k.

Hideaki Suzuki

Hiroshi Tanaka

Masahiro Kobayashi

Hideki Shirazawa

Tsuyoshi Hirayanagi

Hiroyuki Kinpara

Masaki Sakabe

Takayuki Atsumi

Hideki Matsueda

A friction plate for a wet-type multiplate clutch is provided with a core plate and friction linings bonded on opposite sides of the core plate, respectively. Each of the friction linings is composed of plural segment pieces each having at least one first oil groove and at least one second oil groove. The first oil groove opens to a radially-inner side of the friction plate and has a closed end portion located in a radially-intermediate part of the friction lining, and the second oil groove opens to a radially-outer side of the friction plate and has a closed end portion located in another radially-intermediate part of the friction lining. The second oil groove has an opening flared outwardly in a radial direction.

Friction plate for wet-type multiplate clutch

An automatic centrifugal clutch is interposed in a power transmission system between an engine and a driving wheel. A motor, which is capable of generating electricity, is supplied with electricity from a battery to generate auxiliary power. The motor is connected to a crankshaft of the engine. An acceleration data acquisition component acquires the accelerator operation amount and the accelerator operation speed. A rotational speed detection component detects the speed of the crankshaft. A rotational speed estimation component is adapted to estimate the engagement completion rotational speed, which is a rotational speed at which the automatic centrifugal clutch is completely engaged, based upon the acceleration data acquired by the acceleration data acquisition component. A motor controller supplies the motor with a magnitude of electricity in accordance with the acceleration data when the rotational speed detected by the rotational speed detection component has reached the engagement completion rotational speed estimated by the rotational speed estimation component.

Power control for hybrid motorcycle

An automatic centrifugal clutch is interposed in a power transmission system between an engine and a driving wheel. A motor, which is capable of generating electricity, is supplied with electricity from a battery to generate auxiliary power. The motor is connected to a crankshaft of the engine. An acceleration data acquisition component acquires the accelerator operation amount and the accelerator operation speed. A delay time setting component sets a delay time according to the acceleration data. A motor controller supplies the motorwith a magnitude of electricity in accordance with the acceleration operation amount after the delay time has elapsed from the moment when an accelerator grip was moved from an idle position.

The present invention provides a friction plate for a wet-type multi-plate clutch, to which a wet-type friction material is secured and in which there are provided an oil passage communicated with inner and outer peripheral edges, an oil groove opened toward the inner peripheral edge and having a terminal end disposed between the inner peripheral edge and the outer peripheral edge, and at least one circumferential groove communicated with the oil passage and extending in a circumferential direction.

Growing community of inventors

Shizuoka-ken, Japan

Hideaki Suzuki