SU24198A1 - Internal combustion engine with open crank chamber and blown with a stepped piston - Google Patents

Description

In the proposed internal combustion engine with an open crank chamber and with a stepped piston purging, in order to obtain an additional amount of compressed purge air, an additional annular chamber formed by a conical-cylindrical insert attached to the working cylinder, entering the lower part of the stepped piston and equipped with automatic valves.

In FIG. 1 shows a longitudinal section of the engine; FIG. 2 the same with automatic valves.

A two-stage piston sucks in its second step through an automatic or forcibly opened valve F into the annular space C. To increase the amount of air drawn in at the end of the working cylinder, a conical-cylindrical insert is inserted inside which, in the last part of the piston stroke, a sharpened internal part enters piston b, thanks to which the second stage with its external area -B, like a piston, forces air with weak pressure into the annular chamber откуда from where it is, at the very end of the stroke the channel through the channel D to the opening in the cylinder of the window D passes, equalizing the pressure, into the annular space C. The length of the turned part of the piston O is limited by tide 3 for the connecting rod finger and therefore the insert can only force air in the last part of the piston stroke length, and the rest of the piston comes out of the insert and lets a new portion of air inside it. Since the air is bypassed at a low pressure, the sliding surfaces of the piston and the insert may not have sealing devices, being only tightly attached. When the piston moves back, the air from the annulus C starts through the distribution ports I and the valve L to the receiver K for purge air. This transmission takes place all the time until the second-stage piston area overlaps the windows AND, and then the air remaining above them, after some compression, passes through valve L to the receiver M for charge air. In addition to the purge air entering the working cylinder through the windows I, the charge air from the receiver, compressed to approximately two atmospheres, flows through the forced-open valve P and the window P located on the line above the exhaust windows O.

In a modification of FIG. 2, in order to eliminate the harmful effects of pc (srayi in space G when the piston moves in the up, insert and is equipped with an automatic valve T, and in the bypass channel D is an automatic check valve F

The subject matter of the invention

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1. An internal combustion engine with an open crank chamber and with a stepped piston blowing, characterized by the use of a conical-cylindrical insert attached to the working cylinder, the upper cylindrical part of which enters the

The lower part of the stepped piston at the end of its downward movement, forms an annular chamber T, in which an additional amount of air is compressed, distilled through channel D and window D into annular space C, which serves as a purge pump.

2. Modification of the engine described in paragraph 1, characterized in that an automatic valve 2 is placed in the insert, in order to eliminate the harmful effect of the negative pressure in the space G when the piston moves up, the automatic check valve F is located in the bypass from space F