Heavy-oil aero-engine and aircraft

Abstract

The invention discloses a heavy-oil aero-engine and an aircraft. The heavy-oil aero-engine comprises a cylinder body, a cylinder head and a piston assembly, wherein a fuel injection assembly injectinga fuel into a combustion chamber is arranged on the cylinder head; and an annular guide part annularly sunken in the circumferential direction is arranged on the top surface of a piston, the outer side surface of the annular guide part corresponds to the injection direction of the fuel injection assembly, and a guide bulge is formed at the centre of the annular guide part. According to the heavy-oil aero-engine and the aircraft, the injected fuel is guided to an ignition area of a spark plug, the top surface of the piston is optimized, and then the combustion chamber is optimized, the compression ratio is changed, and the knock risk is lowered; and meanwhile, a tumbling effect is improved, adequate atomization mixing for heavy oil can be realized, uniform combustion mixed gas is formed after good mixing, and the fuel can further be organized for efficient combustion, so that the dynamic property, the economical efficiency and the emission performance of the heavy oil applied to an engine are ensured, and the energy conservation, the environment friendliness and the low cost of the heavy oil after being applied to the engine are realized.

Description

technical field [0001] The invention relates to an engine and its application, in particular to a heavy oil aeroengine and an aircraft. 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 air. The o...

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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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