Honda Motor Co., Ltd.

Hiroto Takeichi

Nozomi Okada

Naoya Matsunaga

Isao Azumagakito

Koichi Tsutsumi

Shigeyuki Hara

Kazuma Tanaka

Akihiro Iida

Masaji Narushima

Tsugio Ikeda

In an internal combustion engine for a saddle-ride type vehicle, in which a generator and a clutch are distributed and arranged on opposite sides in an axial direction of a crankshaft, a starting power transmission mechanism is arranged between a cylinder bore and the generator in a direction along an axis of the crankshaft, the starting power transmission mechanism transmitting starting power from a starter motor to the crankshaft, the starter motor being mounted on an outer surface of a crankcase. A crankcase cover covering the generator and the starting power transmission mechanism is mounted on the crankcase on a side opposite to the clutch. A release rod of a clutch release lever switching transmission and cutoff of power of the clutch is turnably supported to the crankcase cover at a side position of the generator.

Internal combustion engine for saddle-ride type vehicle

In an internal combustion engine including a driving-sprocket cam chain guidefor guiding a cam chainalong a driving sprocket, as viewed in a crankshaft axial direction, a guide bodyof the driving-sprocket cam chain guideextends beyond a winding termination point P of the cam chainon the driving sprocketto a position adjacent to a chain moving surfaceof a cam chain tensioner, on which the cam chainslides. The engine provides a cam-chain dropout preventing function to the cam chain guide, thus reducing load on the cam chain tensioner and improving durability of the tensioner lifter.

Internal combustion engine

In an oil filter attaching structure for a vehicle-mounted internal combustion engine, an oil filter of the engine is installed in a filter case integrally formed with a crankcase cover of a crankcase. The crankcase cover is mounted on a side surface of the crankcase so as to cover an end of a crankshaft supported by the crankcase to extend in vehicle widthwise directions. An internal combustion engine accessory and a transmission clutch device are disposed inside of the crankcase cover in respective positions forward and rearward of the crankshaft. The oil filter and an oil supply port are disposed inside of the crankcase cover in respective positions upward and downward of the crankshaft. The oil filter attaching structure efficiently utilizes the space for making itself smaller in size and for better maintainability.

Oil filter attaching structure for vehicle-mounted internal combustion engine

A device is provided for reducing first cylinder vibratory force Fand second cylinder vibratory force Fwhich are generated when a crankshaft is rotated, in a parallel twin cylinder internal combustion engine in which a crankshaft is provided with a first crankpin and a second crankpin at a predetermined phase angle and a cylinder block is formed with a first cylinder and a second cylinder.

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Wako, Japan

Hiroto Takeichi