SU1281699A1 - Two-stroke internal combustion engine with crank-chamber scavenging - Google Patents

Abstract

FIELD OF THE INVENTION The invention relates to engine construction, in particular to internal combustion engines. The aim of the invention is to increase economic efficiency and reduce engine toxicity. The internal combustion engine with regulation of the exhaust phase contains the head I, the piston 2, the crank chamber 3, the cylinder 4 with the inlet channel, in which the regulating device 6 is installed, controlled by the diaphragm chamber 7. The latter is connected to the pipeline 8. with a crank chamber 3, and a check valve 9 is installed in the pipeline. The pressure or vacuum in the crank chamber 3 is used as a regulating signal, depending on the mode of operation of the engine. When the engine is operating, the exhaust phase is regulated, depending on both the speed and the engine load. To reduce the phase of release of the motor overflow to a lower speed or load mode in valve 9, a throttling hole with a diameter of 0.1-0.5 mm is made. I il. S (l

Description

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The invention relates to mechanical engineering, in particular to engine building, namely to two-stroke internal combustion engines with a crank-chamber purge.

The aim of the invention is to increase the economy and reduce engine toxicity.

The drawing shows the proposed engine, General view.

The engine contains a cylinder head 1, a piston 2, a crank chamber 3, a cylinder 4 with an exhaust channel 5, in which a regulating device 6 is installed, blocking the upper part of the exhaust channel 5 and controlled by a diaphragm chamber 7. The latter is connected with pipeline 8 to the crank chamber 3 , and in the pipeline there is a check valve 9 with a throttling hole.

The engine works as follows.

When the piston 2 moves downward after the intake port is closed in the crank chamber 3, the air-fuel mixture is compressed. As a result, the pressure in it increases and the non-return valve 9 opens. Gas through line 8 enters the chamber 7 of the diaphragm, in which a pressure proportional to the pressure in the crank chamber is created, and the regulating device mixes in proportion to the pressure in the chamber 7 of the diaphragm.

When the piston 2 moves upward in a curved chamber 3, a vacuum is created, while the check valve 9 closes, thereby maintaining the pressure in the chamber 7 of the diaphragm constant. Gas leaks from chamber 7 of the diaphragm through its throttling check valve device 9 are replenished into each of the next engine cycle.

The amount of mixing of the regulating device 6, and, consequently, the phase of the engine's release depends on the pressure in the crank chamber 3, which is the limit

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is the mode of operation of the engine; the higher the rotational speed of the engine, the greater the pressure in the crank chamber and the more the regulating device 6 mixes, increasing the flow area of the exhaust channel, and consequently, the exhaust phase. The same relationship exists between the throttle position and the pressure in the crank chamber; the more the throttle is open, the greater the pressure in the crank chamber 3 and the more the mixing of the regulating device 6 and, consequently, the greater the discharge phase.

When the engine is operating, these two factors act simultaneously and, consequently, the release phase is regulated both depending on the speed conditions and the engine load, thereby increasing the engine's efficiency and reducing the toxicity of the exhaust gases.

When switching the motor; 1 to 6o, ie, low speed or load, in order to reduce the release phase of the Liruyushchy device 6, the pressure in the diaphragm chamber 7 must be reduced, for which valve 9 has a throttling orifice with a diameter of 0.1-0.5 mm.

Claims (1)

Invention Formula A two-stroke internal combustion engine with a crank-pinch-chamber purge containing, but less than one cylinder, equipped with a piston and an outlet duct, in which a device for controlling the exhaust phase, controlled by a diaphragm chamber, cylinder head and a crank chamber, is installed, characterized by , in order to improve efficiency and reduce toxicity, the diaphragm chamber is connected to the crank chamber with the help of a pipeline in which a check valve with throttle bore is installed.