Combined type combustion chamber for two-stroke aviation heavy oil plunger engine

A piston engine and combined technology, applied to internal combustion piston engines, engine sealing devices, engine components, etc., can solve problems such as low combustion rate, high explosion pressure, and poor exhaust quality, and achieve soft combustion and blowing The effect of increasing the effect and improving the sealing performance

CN107060986AInactive Publication Date: 2017-08-18BEIHANG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2017-08-18
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a combined type combustion chamber for a two-stroke high-power cross-ratio aviation heavy oil plunger engine. The combined type combustion chamber comprises a cylinder body, a cylinder sleeve, a cylinder head, a plunger and a mono-block pump; the cylinder head is fixed to the top of the cylinder body, the cylinder sleeve is fixed in the cylinder body, and the plunger is arranged inside the cylinder sleeve; a concave pit A is designed in the middle of the top surface of the plunger, a concave pit B is designed in the middle of the bottom surface of the cylinder head, and the concave pit A and the concave pit B are all shallow pits; the concave pit A, the concave pit B and the cylinder sleeve are combined together to form the combined type combustion chamber; and the mono-block pump is fixed to the cylinder head, a nozzle of the mono-block pump extends into the combined type combustion chamber, and nozzle holes of the nozzle are located in the concave pit B. Two air inlets and one air outlet which are opposite to each other are designed and formed in the side wall of the lower portion of the cylinder body. According to the combined type combustion chamber, the structure is compact, the power to weight ratio is big, the combustion speed is high, and the maximum combustion pressure is small; the combustion temperature is low, and the air-exhausting quality is good; and the scavenging form is rotational flow scavenging, the charging loss is effectively lowered, and the volume efficiency is improved.
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Description

technical field

[0001] The invention relates to the field of aviation piston engines, in particular to a combined combustion chamber of a lightweight two-stroke high power-to-weight ratio aviation heavy oil piston engine. Background technique

[0002] The engine is the power output device of the aircraft, and the small piston aeroengine is the main power device used by the military and civilian low-speed aircraft. In recent years, with the development of small aircraft and unmanned aerial vehicles, aviation heavy oil piston 4 engine will become the first choice for low-speed aircraft power plant. Aviation heavy oil refers to the heavy oil left after crude oil is extracted from gasoline and diesel oil. The heavy oil piston engine has attracted the attention of developed countries in the world for its low fuel consumption, high power-to-weight ratio and easy availability. It is an inevitable trend of aviation piston engines in the future. .

[0003] At present, the mainstrea...

Examples

Embodiment Construction

[0035] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0036] The present invention is used for the combined type combustion chamber of two-stroke aviation heavy oil piston engine, comprises cylinder body 1, cylinder liner 2, cylinder head 3, piston 4, monomer pump 5, as figure 1 shown.

[0037] The cylinder block 1 has a cylindrical structure, and the top inner wall is designed with internal threads; the cylindrical cylinder liner 2 is coaxially installed inside the cylinder block 1, and the outer wall and the inner wall of the cylinder block 1 are assembled into one body with a small interference fit. The top of the cylinder liner 2 is designed with an annular shoulder, which cooperates with the annular positioning platform designed on the top of the inner wall of the cylinder block 1 to realize the axial positioning between the cylinder liner 2 and the cylinder block 1; in order to ensure the assembly accuracy...