Small two-stroke four-cylinder horizontally-opposed aero-engine

Abstract

The invention relates to a small two-stroke four-cylinder horizontally-opposed aero-engine compact and simple in structure, high in mechanical strength, wide in environment applicability, small in weight, high in efficiency and reliably, good in manufacturability and high in adaptability. According to the small two-stroke four-cylinder horizontally-opposed aero-engine, the manufacturing and debugging difficulty of an air door control system is simplified, the lubrication condition of a two-stroke engine crankshaft mechanism is effectively improved, and the problem about cooling during runningof a crank connecting rod motion pair is solved. The small two-stroke four-cylinder horizontally-opposed aero-engine meets the aviation high-strength flight requirement through a crankshaft, a connecting rod, a piston, a cylinder and a crankshaft box structure, and continuous cruising running for 10 h can be achieved at the altitude of 3,500 m or above under the work condition of 5,000 r/min.

Description

technical field [0001] The invention relates to the technical field of aero-engines, in particular to a small two-stroke four-cylinder horizontally opposed aero-engine. Background technique [0002] Due to its unique structural characteristics, the two-stroke piston engine can obtain higher mechanical efficiency and combustion efficiency than traditional in-line engines, as well as high energy density and power-to-weight ratio, and is widely used in small and medium-sized drones. The traditional two-stroke multi-cylinder small aero-engines have two-cylinder and four-cylinder structures as typical structures. Although the technology is mature, there are problems such as large volume, poor fuel economy, and complex synchronous control of multiple intake and fuel supply mechanisms. [0003] The Chinese patent of notification number CN104343566B has announced " a kind of electric injection type aviation gasoline engine ", is a kind of two-stroke four-cylinder engine, comprises c...

AI Technical Summary

Problems solved by technology

However, the engines provided by the first two patents have obvious crankcase lubrication problems because their carburetor mechanism or EFI mechanism have the same structural position, that is, they are placed at the cylinder intake port, especially the crankshaft and crank mechanism cannot be well Lubrication, there is a risk of overheating of the crank bearing due to insufficient lubrication and cooling, which will affect the engine power output or even fail, and the control of the dampers of the four intake and oil supply mechanisms is complicated, and synchronous adjustment is time-consuming and laborious

The third patent is to change the single cylinder to four cylinders in order to prevent the sudden stop of the drone caused by the cylinder failure during flight. The inevitable result of the cylinder failure in the actual flight is the engine stop and flight stop and forced landing. The multi-cylinder engine The result of cylinder block failure is the same as that of a single-cylinder engine. Increasing the number of cylinder blocks can only increase the probability of failure

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