Kawasaki Jukogyo Kabushiki Kaisha

Kawasaki Jukogyo Kaubshiki Kaisha

Yoshinobu Tanaka

Hisatoyo Arima

Yoshimoto Matsuda

Shohei Naruoka

Hiroyuki Watanabe

Satoaki Ichi

Yoshiharu Matsuda

Kozo Arai

Toshio Araki

Atsufumi Ozaki

Yasuo Okada

Masato Kinoshita

Hideaki Ebisui

Masaaki Miyoshi

Atsushi Senda

Shinji Shuto

Hironori Tomari

A planetary gear device for a motorcycle transmits a power of a reciprocating combustion engine to a supercharger. The supercharger pressurizes intake air for the combustion engine. The supercharger includes a supercharger rotation shaft and an impeller supported by the supercharger rotation shaft. A planetary gear and an internal gear of the planetary gear device are each composed of a helical gear, and the planetary gear and the internal gear form a helical gear pair. The planetary gear device includes a pressing unit that applies a pressing force in an axial direction to the planetary gear.

Motive-power transmission device for supercharger

A supercharger-equipped combustion engine includes a crankshaft extending in a widthwise direction of a vehicle supported by a crankcase and a supercharger disposed above the crankcase. Power from the crankshaft is transmitted through a supercharger transmission to the supercharger. A crankcase body has an opening formed to be opened at the right side in the widthwise direction, and at least a part of the opening is covered with a holder detachably mounted on the crankcase body. The supercharger transmission includes input and output shafts extending in the widthwise direction of the vehicle, and the input and output shafts are rotatably supported at first end portions thereof at the right side by first bearing portions formed in the holder and are rotatably supported at second end portions thereof at the left side by second bearing portions formed in a side wall of the crankcase body.

Engine with supercharger

A supercharging system for a combustion engine of a motorcycle includes a supercharger which pressurizes intake air and supplies the intake air to the combustion engine, an air intake chamber which is connected to downstream of the supercharger, a relief passage which relieves the high-pressure intake air within the air intake chamber, and a relief valve which is provided on the relief passage. The air intake chamber is disposed above the combustion engine, and the relief passage is disposed below an upper end of the air intake chamber. The relief passage is connected to a front surface of the air intake chamber.

Supercharging system for engine

A combustion engine for a motorcycle includes a supercharger which pressurizes intake air. The supercharger is driven by power of the combustion engine. A first cushioning body which suppresses rotation fluctuation of power is provided on a power transmission path leading from the combustion engine to the supercharger. The first cushioning body has a damper structure to transmit power from an upstream side to a downstream side thereof through an elastic body.

A motorcycle includes a supercharger to pressurize an intake air and supplying it to a combustion engine and an air intake chamber disposed downstream of the supercharger. The air intake chamber is made of a metallic material and has a capacity of an interior space thereof which is within the range of three to eight times the displacement of the combustion engine. The dimension from an upstream end portion on an inlet side of the interior space of the air intake chamber to a downstream end portion on an outlet side of the interior space of such air intake chamber is chosen to be three or more times the inner diameter of an outlet.

Air intake chamber for saddled vehicle

An air intake chamber is disposed at a location downstream of a supercharger and upstream of a throttle body. The air intake chamber serves to accumulate an intake air pressurized by the supercharger. This air intake chamber includes a confronting portion, which has an outlet and overlaps the throttle body, and a connecting portion that connects between the confronting portion and a discharge port of the supercharger. The connecting portion has an outlet side opening set to be larger than an inlet side opening thereof.

An air intake duct of a motorcycle extends rearwardly from a front portion of a motorcycle body so as to pass laterally of the left side of a motorcycle frame structure, and incoming wind is supplied as an intake air through the air intake duct to a combustion engine. The air intake duct is divided in a widthwise direction of the motorcycle. An upper dividing face of the air intake duct is disposed inward of an intermediate position, in a motorcycle widthwise direction, of the air intake duct.

Air intake duct of saddle-ridden vehicle

A combustion engine of a motorcycle has an engine rotary shaft extending in a vehicle widthwise direction. Incoming wind taken in from a front of a steering handle that is positioned in front of the combustion engine, is introduced through an air intake duct to the combustion engine. The air intake duct extends from the front of the steering handle to a rearward of a cylinder block so as to pass above a radiator and pass laterally of one side of the cylinder block.

Saddle-ridden vehicle engine

An air intake duct, of a saddle-riding type vehicle, in which a flow velocity of an intake air is less likely to be reduced to enable prevention of reduction of an efficiency of a supercharger, is provided. The air intake duct of a motorcycle serves to supply incoming wind as the intake air to the supercharger for a combustion engine. The air intake duct has a passage area that is gradually reduced from an air intake port at a front portion toward a downstream portion connected to the supercharger at a rear portion.

A gear changer of a power transmitting device includes an input shaft to which a rotational force is inputted from an engine, an output shaft for outputting the rotational force to a rear wheel, and a plurality of speed change gear pairs for transmitting the rotational force from the input shaft to the output shaft. A slider member for selecting one of the speed change gear pairs to transmit the rotational force from the input shaft to the output shaft is supported by the output shaft. Selection of one of the speed change gear pairs is accomplished by moving the slider member in an axial direction by means of a shifter mechanism. A pump rotary shaft, to which the rotation is transmitted from the input shaft, is disposed at a location between the input shaft and the shifter mechanism in a circumferential direction of the output shaft.

Power transmitting device

An air intake chamber for a motorcycle is disposed downstream of a supercharger, for pressurizing and supplying an intake air to an engine, and upstream of a throttle body, for controlling the amount of the intake air to be supplied to an air intake port of the engine. The air intake chamber serves to accumulate the high pressure intake air discharged from the supercharger. The air intake chamber is provided with an injector, which has a fuel injecting port positioned at a location displaced from an axis of an outlet of the air intake chamber.

An air intake duct of a motorcycle forms an air intake passage for supplying an intake air to a supercharger. The air intake duct forms a curve portion and is connected to the supercharger. The air intake passage has a transverse cross-section which is shaped such that a dimension in an orthogonal direction that is orthogonal to a radial direction of the curve portion is gradually reduced from the center of the curve portion toward an outer side, in the radial direction, of the curve portion.

A combustion engine (E) for a motorcycle includes a crankshaft () extending in a widthwise direction of the motorcycle and a supercharger () which pressurizes intake air (I). A clutch gear () to which a clutch is connected is provided at the right side of the crankshaft (), and a supercharger gear () which drives the supercharger () is provided at the left side of the clutch gear (). The supercharger gear () is formed on a crank web () disposed such that a journal () is located between the clutch gear () and the crank web ().

The present invention provides an air intake structure of an engine capable of cooling intake air compressed by a supercharger by reducing pressure loss. An air intake structure of an engine () having a supercharger () supercharging air and an air intake chamber () receiving the air supercharged by the supercharger () and sending the supercharged air to the engine, wherein a throttle body () is connected to the air intake downstream side of the air intake chamber (), wherein an air intake port () of a cylinder head () of the engine () is connected to the air intake downstream side of the throttle body (), wherein a liquid cooling type intercooler () is provided in the air intake chamber ().

Air intake structure of engine and motorcycle having the same

A transmission lubricating structure which lubricates a transmission using a lubricating fluid, the transmission including a plurality of gear pairs each including a drive gear and a driven gear, includes a lubricating fluid feeding unit for feeding the lubricating fluid to the gears of the gear pairs; wherein the lubricating fluid feeding unit includes a plurality of injection nozzles, each of which directly injects the lubricating fluid to a tooth of the drive gear and a tooth of the driven gear, which teeth start to engage with each other.

Growing community of inventors

Hyogo, Japan

Yoshinobu Tanaka