Piston for two-stroke engine

Abstract

The invention relates to the technical field of engines, and discloses a piston for a two-stroke engine. The piston comprises an air cylinder, and a crankcase is integrally formed below the air cylinder. According to the piston for the two-stroke engine, the piston is movably sleeved with a sliding groove, and the sliding groove is matched with a first downward one-way valve and an upward one-way valve for mounting, so that in the process that the piston moves from a lower stop point to an upper stop point, air is sucked into the sliding groove from an air hole to be stored through the first downward one-way valve under the suction action of the piston in the sliding groove; in the process that the piston moves from the upper stop point to the lower stop point, the piston compresses gas in the sliding groove and injects the gas into a scavenging hole from the upward one-way valve, combusted air in the air cylinder is extruded out, the temperature in the air cylinder is reduced, the gas which is compressed and heated in the crankcase enters the air cylinder, is higher than the air in temperature and rises in the air cylinder, mixed gas of the air and the combusted gas is extruded and exhausted from the upper part, less gas is exhausted from an exhaust hole, the combusted gas is exhausted completely, and sufficient combustion of the gas is guaranteed.

Description

technical field [0001] The invention relates to the technical field of engines, in particular to a piston for a two-stroke engine. Background technique [0002] When fighting a fire in the grassland, it is necessary to clear a isolation zone to prevent the expansion of the fire field. This requires the use of a brush cutter to work. The brush cutter uses a two-stroke engine as a power source to drive the cutting belt to rotate to cut the grass and form Divider. [0003] In a two-stroke engine, when the piston moves upward from the bottom dead center, the ventilation hole and the exhaust hole are closed sequentially, the air intake hole is opened, and the gas entering the cylinder is compressed. When the air intake hole is exposed, the combustible gas flow enters the crankcase. , when the piston rises to the top dead center, the spark plug ignites the combustible gas, and the gas expands to push the piston down to do work to reach the bottom dead center. The air hole is dis...

AI Technical Summary

Problems solved by technology

[0005] The invention provides a piston for a two-stroke engine, which has the advantages of clean gas discharge after combustion, increased oxygen content in the gas, sufficient combustion, and less carbon deposition, and solves the problem that the temperature of the gas is lower than that of the gas after combustion and injected into the cylinder The gas cannot squeeze out the combusted gas at the top of the cylinder, and the combusted gas reacts with the oxygen in the gas, causing the gas to be unable to fully burn when ignited and combusted, and carbon deposits are easy to occur

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