SU1254190A1 - I.c.engine provided with air and liquid cooling - Google Patents

Description

The invention relates to mechanical engineering and relates to devices for air and liquid cooling of reciprocating internal combustion engines, in particular cylinder cooling.

The purpose of the invention is to increase the cooling efficiency by redistributing the flow of cooling air.

FIG. 1 shows a cylinder-piston group of an engine, a section; in fig. 2 - engine with a cavity in the cylinder cooling, cut; in fig. 3 - engine with cooling cavities in the head and cylinder, section; in fig. 4 shows section A-A in FIG. one.

The engine has an annular coolant cavity 1 in the upper zone of cylinder 2 (Fig. 2 and 3) a cavity (channels) 3 in the cylinder head 4 (Fig. 1 and 3) and a gallery cavity 5 in the bottom of the piston 6. Tube 7 cavity and parts channels are connected at the inlet with a pressure line 8 of the engine lubrication system, at the outlet with a tube 9 through the gallery cavity 5 of the piston 6 with the crankcase cavity 10. FIG. 4, the arrows 11 show the direction of movement of the cooling air flow when blowing cylinders. The tubes 7 and 9 are installed in the holes 12 (Fig. 1-3) and the recesses 13 (Fig. 4)

giving ribs 14 cylinder. Tubes 7 and 9 are made of copper, which has a greater thermal conductivity than the material of the cylinder - cast iron.

When the engine is operating, the oil enters from the line 8 through the inlet tube 7 into the cooling cavity 1 of the cylinder and the cavity (channel) 3 of the cylinder head (Fig. 3). The oil then passes through the discharge tube 9, the crankcase channels and the piston into the gallery cavity 5 of the bottom and merges into the crankcase cavity 10. In other embodiments, the oil is drained into the crankcase cavity after passing through the annular cavity 1 in the cylinder (Fig. 2) or cavity (channel) 3 heads (Fig. 1). When blowing the cylinder, the flow of cooling air passes through the channels between the cooling fins, while washing the tubes 7 and 9.

The use of tubes installed in the cylinder fin zone instead of tides in the wall of the cylinder, allows redistributing the cooling air flow and eliminating the "shaded areas" (Fig. 4). Between the outer wall of the tube and the wall of the cylinder, throttling of the air flow occurs, increasing the turbulence of the flow and pressing it to the walls of the cylinder.

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Compiled by P. Pokrovsky

Editor E. KopchaTehred I. VeresKorrektor S. Cherni

Order 4701/38 Circulation

VNIIPI USSR State Committee

for inventions and discoveries

113035, Moscow, Zh-35, Raushsk nab. 4/5

Branch PPP "Patent, Uzhgorod, st. Project, 4

Claims (2)

1. INTERNAL COMBUSTION ENGINE WITH AIR AND LIQUID COOLING, comprising a head and a cylinder with fins and liquid cooling cavities, a pressure liquid line with inlet and outlet channels made in the cylinder and connected to the liquid cooling cavities of the head and cylinder. characterized in that, in order to improve cooling efficiency by redistributing the flow of cooling air, the ribs of the cylinder are provided with through holes, and at least one of the inlet and outlet channels is formed by a tube installed in the through holes of the ribs. 2. The engine according to and. 1, characterized in that the tube is made of a material whose thermal conductivity is greater than the thermal conductivity of the material of the ribs. h s SU „1254190