RU2743470C1 - Compression ratio adjustment device for internal combustion engine - Google Patents

Abstract

FIELD: mechanical engineering.

SUBSTANCE: invention relates to mechanical engineering. The device for controlling the compression ratio of an internal combustion engine comprises a working cylinder with a working piston and an output opening, a fixed cylinder with a fixed piston and an inlet opening, a receiver, a sealing cup of the rod of a working piston, a rod with the supporting washer, a connecting pipeline, the elements are connected by a pipeline in a following sequence: an outlet opening from the working cylinder, a non-return valve, a receiver, and a pressure relief valve with a opening pressure smaller than the pressure at detonation, an inlet opening of the fixed cylinder.

EFFECT: pneumosystem device solves the problem of replacing the gear assembly in the prototype with a pressure relief valve, which is relatively simpler, cheaper and more reliable.

1 cl, 1 dwg

Description

The invention relates to mechanical engineering. The closest to the invention that is claimed is a device according to the application UA a2017 or according to PCT / UA2017 / 000045 which is taken as a prototype.

The device contains a combustion chamber, limited by a working piston, which moves in the working cylinder and a trimmer cylinder, in which the trimmer piston moves.

The prototype and the invention have the following features in common.

- the trimmer cylinder is cut into the combustion chamber;

- the trimmer piston is located inside the trimmer cylinder;

- trimmer piston rod;

- inlet of the trimming cylinder;

- outlet of the working cylinder;

- receiver;

- check valve; -pipeline;

- sealing collar.

In the prototype, air is supplied to the trimmer cylinder above the trimmer piston through a pipeline through the outlet of the working cylinder, check valve, pressure reducer, receiver and further through the inlet of the trimmer cylinder.

A pressure reducer is an expensive and unreliable device. The task was to replace the pressure reducer with a more reliable and cheaper device.

The device contains a working cylinder - 1 cm. FIG. 1, which houses the working piston - 2, the trimming cylinder - 4, which houses the trimming piston - 5, the rod - 6, the outlet - 3 from the working combustion chamber, the check valve - 7, the pipeline - 8, the receiver - 9, the inlet - 10 trim cylinder - 4, sealing collar - 11, safety valve - 12, support washer - 13.

The device works in the following order.

When starting the engine, the compressed working mixture from the combustion chamber through the outlet - 3, the check valve - 7 will enter the pipeline - 8 and then into the receiver - 9 and through the inlet - 10 into the trimming cylinder - 4 above the trimmer piston - 5. Safety valve - 12 opens at a pressure lower than the detonation pressure.

When the engine is started for the first time, working cylinder - 1 with working piston - 2 and check valve - 3 will operate in compressor mode.

The maximum value of the required pressure is set by the safety valve - 12. Through the safety valve - 12, gases will constantly come out in a very small amount, since the pressure increase above the set value on the safety valve - 12 will be insignificant due to the fact that the trimmer piston - 5 is constantly moving and equalizes the pressure on both sides.

As you know, the safety valve protects against destruction of the pneumatic system in which it is installed. In this case, the safety valve acts as a pressure regulator that limits the pressure in the combustion chamber within the limits excluding detonation, and also burns the burning mixture qualitatively, which saves fuel and improves the environmental performance of exhaust gases.

Claims (1)

A device for regulating the compression ratio of a reciprocating internal combustion engine, containing a working cylinder with a working piston and an outlet, a tuned cylinder with a tuned piston and an inlet, a receiver, a sealing collar of the working piston rod, a rod with a support washer, a connecting pipeline, characterized in that the device consists of elements connected by a pipeline in the following sequence - an outlet from the working cylinder, a check valve, a receiver, a safety valve with an opening pressure lower than the pressure during detonation, an inlet of a tuned cylinder.

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