Two-stage piston type two-stroke engine

Abstract

The invention provides a two-stage piston type two-stroke engine which comprises an air cylinder, a piston, a crankshaft box and a lubricating system. Air exhausting valves and spark plugs are arranged at the top of the air cylinder; the piston is arranged in the air cylinder; the crankshaft box is arranged on the lower portion of the air cylinder; the piston is connected with a crankshaft in the crankshaft box through a connecting rod; the piston is a two-stage piston; the shape of the air cylinder is matched with that of the piston; the air cylinder further comprises an upper-stage air cylinder body and a lower-stage air cylinder body; a plurality of scavenging holes are annularly formed in the upper-stage air cylinder body; an air inlet pipe communicating with the bottom end of the air cylinder is arranged outside the air cylinder; and the upper end of the air inlet pipe is connected with one of the scavenging holes, and an oil jetting device is arranged in the connecting position. According to the two-stroke engine, the two-stage type piston and the air cylinder connected with the two-stage type piston in a matched mode are arranged, the effects that air inlet and air exhausting do not interfere with each other, and stirring and burning are thorough are achieved, energy is saved, exhaust emission is effectively reduced, meanwhile, pressurization and cooling are achieved, the lubricating system is further arranged, thus the lubrication effect is good, engine oil mixed combustion is effectively avoided, and the service life of all parts is effectively prolonged.

Description

technical field [0001] The invention relates to a two-stroke engine, in particular to a two-stage piston two-stroke engine. Background technique [0002] The working cycle of the two-stroke internal combustion engine is completed in two piston strokes, that is, the crankshaft rotates one week. In a four-stroke internal combustion engine, the exhaust process and the intake process are often collectively referred to as the ventilation process. In a two-stroke internal combustion engine, the ventilation process refers to the process in which exhaust gas is swept away and replaced by new air from the cylinder. The working cycles of the two internal combustion engines differ mainly in the gas exchange process. [0003] Existing engines include two-stroke engines and four-stroke engines. Two-stroke engines are simple in structure and light in weight. They only need to rotate once to complete a work. Part of the unburned fresh combustible gas is discharged together with the exha...

AI Technical Summary

Problems solved by technology

[0003] Existing engines include two-stroke engines and four-stroke engines. Two-stroke engines are simple in structure and light in weight. They only need to rotate once to complete a work. Part of the unburned fresh combustible gas is discharged together with the exhaust gas after combustion, causing waste; the gas for combustion is a mixture of engine oil and gasoline, the combustion is not complete, and the exhaust gas pollution is serious

In addition, due to the high working efficiency of the two-stroke engine, the internal temperature is high, and the lubrication is poor, and the parts are severely worn, which is easy to cause the phenomenon of cylinder scuffing and reduce the service life of the cylinder.

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