Honda Motor Co., Ltd.

Akihiro Iida

Hiroto Takeichi

Masaya Kurokawa

Yoshihiro Kitada

Yuichi Mori

A compact water cooled internal combustion engine for a vehicle wherein a water pump operated by a pump driving shaft is arranged on a crankcase cover for covering a lateral side of a crankcase, such that an axis of rotation of the water pump is coaxial with the pump driving shaft. A case member that forms a pump case of a water pump, together with a crankcase cover, and that rotatably supports a pump shaft of the water pump, is attached on an inner surface side of the crankcase cover.

Water cooled internal combustion engine for vehicle

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.

Balancer device for parallel twin cylinder internal combustion engine

A support structure for a water-cooled internal combustion engine supported by a body frame of a motorcycleincludes a cooling device that circulates cooling water through an inside and an outside of at least a cylinder head of the engine, a thermo-valve that controls the cooling water circulating in the cooling device, and a thermo-valve case that accommodates the thermo-valve and that is integrally molded with the cylinder head such that a part thereof bulges from a side surface of the cylinder head. A support portion formed on the cylinder head is fixed to the body frame and is integrally molded so as to stride between the cylinder head and the thermo-valve case, whereby the support portion is solidly formed and an area around a thermo-valve case can be reinforced by the support portion.

Support structure for water-cooled internal combustion engine

This invention relates to a cam mechanism with a decompression device formed by integrating a centrifugal weight and a decompression cam lobe. The decompression device is formed by preparing a cylindrical shaft having a decompression cam lobe at one end of the shaft and a centrifugal weight at the other end. The device is constructed to be disposed on a camshaft by inserting the decompression cam lobe into a grove portion of a second cam, and pivotally supporting the shaft receiving hole on the camshaft.

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Wako, Japan

Akihiro Iida