SU1239383A1 - Air-cooled engine cylinder head - Google Patents

Description

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The invention relates to mechanical engineering, namely engine building, and can be used in internal combustion engines with air cooling from a centrifugal fan located on the engine crankshaft.

The purpose of the invention is to reduce the thermal stress of the head by reducing the cooling efficiency.

FIG. 1 shows the cylinder head of an internal combustion engine, the section in FIG. 2 - the same, bottom view.

The head contains the bottom plate 1 with a notch under the combustion chamber 2, in vertical ribs 3, the top plate 4, made in the form of a casing mounted on the bottom plate and covering the cooling fins along the entire outer contour, channels in the bottom plate for inlet 5 and air outlet 6 . Channels 5 and 6 in the bottom plate 1 smoothly pass into the intercostal canals of the head, while in the cooling air inlet section, the ribs 3 are directed to the top of the ribs.

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and at the exit site - in the direction of the flow of the cooling air.

When the engine is operating, the cooling air is supplied by the fan to the channels 5 5 made in H1 of the upper plate 1, and then to the interlocking channels, where they turn smoothly through 90 °, then passes the main section where the combustion chamber with

10 spark plugs, and at the exit portion it is turned downward and then out of the channels 6 of the lower plate. When air passes through the head channels, its speed at the inlet area gradually increases, as the channels in this section smoothly narrow. In the main section, the air velocity is constant, except for the location of the candle.

20, where it increases, and at the exit section, the air speed decreases due to the expansion of the channels, due to which smooth energy is extinguished at the outlet of the head and air resistance to air is reduced.

Compiled by P. Moskaltsov Editor A. Shishkin Tehred N. Bonkalo Proofreader M. Demchik

Order 3374/33 Circulation 523 Subscription VNIIPI USSR State Committee

for inventions and discoveries 113.035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, st. Project, 4

Claims (1)

AIR-COOLED ENGINE CYLINDER HEAD, comprising a lower plate with a recess for the combustion chamber, an upper plate and vertically arranged cooling fins between them, characterized in that, in order to reduce heat stress by increasing cooling efficiency, channels are made in the lower plate for supplying and discharging cooling air, and the upper plate is made in the form of a casing mounted on the lower plate and covering the ribs throughout the outer casing. s (Oh Figure 1 K) 03 s © 03 00 СО