Kubota Corporation

Tsuyoshi Nishida

Ryoichi Ito

Koji Iwai

Kiichiro Yamada

Mitsumasa Isoda

Satoshi Tabushe

Kouichi Akeda

Junji Kimura

In a water-cooling system for a water-cooled horizontal engine, a radiator and a radiator fan are arranged at the front of a cylinder head which is mounted forwardly of a cylinder block of the engine. A radiator fan generates a cooling air flow which passes through the space over the cylinder head and toward the radiator, the height of the radiator being sized to match the width of the cylinder block measured in the upward and downward direction.

Water-cooling system for a water-cooled horizontal cylinder engine

In a water-cooling system for a water-cooled horizontal cylinder engine, a radiator and a radiator fan are arranged at the front of a cylinder head which is mounted forwardly of a cylinder block of the engine. A radiator fan generates a cooling air flow which passes through the space over the cylinder head and toward the radiator, the height of the radiator being sized to match the width of the cylinder block measured in the upward and downward direction.

In a forced air-cooled engine, a local high temperature portion is adapted to be cooled effectively so that thermal distortion and thermal breakage of a cylinder and/or a cylinder head caused by such a local high temperature can be avoided. To prevent thermal distortion of the engine, there is provided a cylinder jacket, for cooling part of an engine cylinder in a partition wall between the cylinder and its push rod chamber. As means for preventing the thermal distortion of the cylinder head, there is provided a cooling air passage in a cylinder head, and there is also provided a head jacket for oil-cooling around a divided combustion chamber so as to circulate oil through the head jacket and a radiator. Local high temperature portions in the cylinder and/or the cylinder head can thus be oil-cooled effectively.

Engine with forced air-cooling

A closed evaporative cooling system for an engine includes a water jacket having an opening formed through an upper wall of said engine, a condenser having an upper tank, a bottom plate and condenser tubes, a seat formed around said upside opening for fixing said bottom plate of said condenser thereon, a pressure regulating valve for regulating internal pressure of said upper tank, each of said tube has an upper end penetrating through the bottom wall of said upper tank and brazed or soldered thereto, and a lower end penetrating through said bottom plate and brazed or soldered thereto respectively, and the system further includes a damper pipe for damping the variation of internal pressure of said upper tank, having one end communicated with said upper tank of said condenser fixed on the upper part of said water jacket of said engine and another end communicated with said pressure regulating valve.

Closed evaporative cooling system for an engine

A horizontal type Diesel engine wherein a gear case is juxtaposed to a crankcase axially of a crank shaft, said crankcase horizontally receiving a cylinder therein and a radiator and a fuel tank are juxtaposed on top of the crankcase. The Diesel engine is characterized by a breather disposed on the upper wall of the gear case substantially at the middle between the front and rear ends thereof and an oil partition wall opposed to the breather, the arrangement being such that even if the vehicle on which this engine is mounted is tilted, the lubricating oil contained in the crankcase and gear case will not leak. Further, a governor shaft vertically pivotally supported by the gear case has its one end projecting into the breather so as to prevent the oil from leaking into the outside along the end of the governor shaft.

Growing community of inventors

Sakaishi, Japan

Tsuyoshi Nishida