SU57485A1 - Internal combustion carburetor engine with a variable compression ratio automatically while the engine is running - Google Patents

Description

An automobile engine rarely works for a long time at full load: it works 90% of the time at a load from 3 to V2. Therefore, engines that have the maximum efficiency with V4 at full load, most of the time in operational modes are not economical. This is due to the fact that during throttling, the compression pressure, the flash pressure and the average indicated pressure drop. To avoid this disadvantage it is necessary to increase the degree of compression.

Engineered for this purpose are already known for internal combustion engines with a compression ratio automatically variable on the engine run due to the displacement of the auxiliary fluid pressure in the cylinder head, the change of this pressure produced by blocking the bypass channels by the regulator of the carburetor throttle.

In the proposed engine of this kind as an adjusting body, automatically changing

degree of compression, a crane is used, the plug of which is mounted on the axis of the throttle valve.

The drawing shows the scheme of the proposed engine.

In the engine cover / cylinder, there is a flap 2 with a spindle S attached to it, at the end of which there is a plate 4 supporting the spring 5. For supplying oil from pump 6 serves pipe 7 with a check valve 8 and fitting 9, and for draining oil - pipe 10 with nozzle 11.

The oil pumped by the oil pump (gear pump) 6 brings oil into the space 12 between the piston 2 and the lid of the device and then goes through the pipe 10 through the valve 13, which has an axis in common with the throttle valve 14 of the carburetor. Since automotive engines typically operate under loads from Vs to / 2. The engine has two pistons, which provide two additional degrees of compression.

The crane 13 is positioned so that when the throttle position corresponds to Vs (or, respectively, 2 load, it closes the oil outflow from

device (similar to the second piston for dl / 2 load). Then the oil pump 6 at the suction stroke of the working cylinder will supply oil to the device until it completely fills the space G2, setting the compression level appropriate for the load that the engine had under normal load, thereby maintaining the old (constant) pressure squeeze.

When the throttle valve 14 is opened, the valve will open a hole for the oil to exit from the space 12 under the piston, which, under the action of pressure in the working cylinder and tension of the spring 5, will rise to its upper position. Turning the throttle valve 14, at the same time changing the pressure under the piston 2 and forcing it to take the position corresponding to the throttle position, thus changing

thus, the degree of compression within the desired limits.

The oil flowing through the pipe 10 passes further through the oil filter 15 into the oil tank 16.

The subject matter of the invention.

An internal combustion carburetor engine with a variable compression ratio automatically moving the engine due to the displacement of the auxiliary piston loaded with pressure in the cylinder head, the change in the pressure of which liquid is produced by blocking its bypass channels by the regulator associated with the throttle valve of the carburetor, characterized in that regulator, which automatically changes the degree of engine compression, a crane 13 is used, the plug of which is mounted on the throttle axis 14. E fa st Author's Certificate IV JSS 57485 Berezin