Piston of heavy oil engine and aero-engine

Abstract

The invention discloses a piston of a heavy oil engine and an aero-engine. A concave guide part sunken relative to the top surface of the piston is formed on the top surface of the piston; the outwardoutermost point of the outer side face in the radial direction exceeds or is flush with a fuel injection direction of a fuel injection assembly; an export face exceeds the ignition position of a central sparking plug inward in the radial direction; and an upward protruding strip-type bump is formed between the outer side face and the export face in the bottom. An injected fuel is guided to an ignition region of the sparking plug by means of the concave guide part which corresponds to the fuel injection direction, is located on the top surface of the piston and is sunken relative to the top surface of the piston, so that the top surface of the piston is optimized, and therefore, a combustion room is optimized, the compression ratio is changed, and the detonating risk is reduced; and meanwhile, a tumbling effect is enhanced, so that heavy oil can be atomized and mixed fully to form uniform combustion mixed gas after being mixed well. Fuels can be organized to combust efficiently, too, so that the dynamic property, the economical efficiency and the emission performance of the heavy oil applied to the engine are guaranteed, and energy conservation, environment-friendliness and low cost of the heavy oil applied to the engine are achieved.

Description

technical field [0001] The invention relates to an engine and its application, in particular to a heavy oil engine piston and an aircraft engine. Background technique [0002] As the fuel for engines, heavy oil will become the power trend of small and medium-sized aircraft; however, heavy oil has high viscosity and poor low-temperature fluidity, which leads to poor atomization effect compared with ordinary light oil, which affects the combustion effect, and even causes difficulty in starting the engine and poor emission. Up to standard. [0003] In the prior art, in order to ensure good atomization and start-up of heavy fuel oil engines, there are fuel supply methods such as carburetor + auxiliary preheating technology, mechanical injection (fuel direct injection), electronically controlled fuel injection, etc. However, due to the nature of the heavy oil itself, it cannot reach the atomization level of general oil products, and it cannot be mixed evenly with the combustion ...

AI Technical Summary

Problems solved by technology

However, due to the nature of the heavy oil itself, it cannot reach the atomization level of general oil products, and it cannot be mixed evenly with the combustion air. The original EFI ignition method cannot be used when ignition is started; even if the ignition method is used for operation , it will also cause a series of engine problems due to insufficient combustion, unable to achieve reliable atomization of heavy oil and unable to organize efficient combustion of mixed fuel, which makes the power, economy and emission of heavy oil used in engines unable to meet expectations effect, so that the application of heavy oil cannot be widely popularized

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