JPH02135615U - - Google Patents

Description

[Brief explanation of drawings]

Fig. 1 is a schematic longitudinal sectional view of the main parts of an engine showing an embodiment of the present invention, Figs. 2 A and B are diagrams explaining the operating principle of a heat pipe with a temperature switch function, and Fig. 3 is a diagram of the heat pipe. A perspective view, Fig. 4 is a temperature characteristic diagram of engine cooling water and lubricating oil used in an engine with a water-cooled oil cooler, and a lubricating oil used in an engine without an oil cooler as a function of engine speed, and Fig. 5 is a diagram showing the heat pipe of the present invention. FIG. 2 is a temperature characteristic diagram of lubricating oil used in an engine with respect to engine rotation speed. 8... Oil pan, 2... Cylinder, 1... Cylinder block, 17... Water jacket,
16...Oil circulation path, 19...Heat pipe.

Claims (1)

[Scope of utility model registration request] a cylinder block having an oil pan for collecting lubricating oil in its lower part and a cylinder in its upper part; a water jacket provided along the outer circumference of the cylinder of this cylinder block;
An oil circulation path that sucks up the lubricating oil in the oil pan, supplies it to each sliding part of the engine, and sequentially returns it to the oil pan; one end of the path is inside the water jacket, and the other end is connected to the oil circulation path. They are inserted in the middle of each circulation path, and only when the lubricating oil in the oil circulation path reaches a predetermined temperature or higher, the heat pipe function operates to guide the heat of the lubricating oil in the oil circulation path to the water jacket, discharging the lubricating oil. A lubricating oil cooling structure for an engine, comprising a heat pipe with a temperature switch function that cools the oil and always maintains the oil temperature at a substantially predetermined temperature.