Cylinder-driving two-stroke engine

Abstract

The invention discloses a cylinder-driving two-stroke engine which comprises a cylinder body, a crankcase and a cylinder head, wherein a crankshaft and a connecting rod are arranged in the crankcase; a fixed cylinder sleeve is mounted in the cylinder body; a movable cylinder capable of moving in a reciprocating manner along the fixed cylinder sleeve is arranged in the fixed cylinder sleeve; the center at the outer end of the baseplate of the movable cylinder is hinged to the connecting rod, so as to drive the crankshaft to rotate; a piston which can extend into the cylinder body and is fixed, is arranged on the cylinder head; a piston head at the front end of the piston is mounted in the movable cylinder; the movable cylinder conducts reciprocating movement relative to the piston; a combustion chamber and an exhaust passage are formed in the piston head. The cylinder-driving two-stroke engine adopting the design has the advantages that the single cylinder power can be improved; the size as well as the production cost can be reduced; energy conservation is further realized; harmful emission is reduced.

Description

technical field [0001] The invention relates to the technical field of piston internal combustion engines, in particular to a cylinder-driven two-stroke engine. Background technique [0002] The piston engines currently in use all have pistons reciprocating in the cylinders. There are four-stroke and two-stroke cycle types, which are applied according to different needs. The four-stroke working method is that the crankshaft rotates 720°, and the air intake, compression, deflagration work, and exhaust procedures are completed in one cylinder. The two-stroke working mode is that the crankshaft rotates 360°, and the intake, compression, deflagration work, and exhaust procedures are completed in one cylinder. This traditional working method has a common disadvantage, that is, the cylinder needs enhanced cooling, most of the heat energy is taken away by the exhaust gas and cooling water, only a small part is converted into mechanical work, the thermal efficiency is very low, and...

AI Technical Summary

Problems solved by technology

However, these improved technologies did not get rid of the constraints of the traditional structure of the engine, so there is still no breakthrough in application

[0003] For the traditional piston engine, there have been various technical solutions for a long time around the problem of fuel saving, but they have not brought significant results

Cylinder adiabatic technology has also been used to achieve fuel saving. The method is to build a hot wall high-temperature environment in the cylinder similar to a boiler furnace to promote rapid and complete combustion of fuel. Keeping high temperature in the cylinder also helps the gas to expand and continue to work, but this There are still many technical obstacles in the first method. How to solve the problems of air sealing, oil lubrication and air intake rejection in high temperature environment has not been solved so far.

[0004] In fact, the structure of the traditional engine is the key to the problem. The working procedures of a typical four-stroke cycle are all completed in one cylinder. Due to various technical requirements, it is impossible to achieve a satisfactory balance in the design. For example, the high-temperature environment can Improve the combustion method, but the reciprocating movement of the piston in the cylinder must be supported by the cylinder wall, and the friction problem must be solved by lubricating oil. The increase in the temperature in the cylinder will destroy the oil film and cannot work normally, etc.

[0005] Incomplete combustion of engine fuel, in addition to the problem of not saving energy, will also affect the exhaust emission standards and cause serious pollution to the environment and space

[0006] Existing high-power marine diesel engines, in order to improve reliability and save fuel, mostly adopt the low-speed two-stroke method, but the disadvantage is that the piston stroke is too long, and a crosshead support should be added under the piston to ensure the normal operation of the piston and connecting rod. The mechanism takes up a lot of space, making the low-speed diesel engine look very bulky

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