Heavy oil engine piston and aero-engine

Abstract

The invention discloses a heavy oil engine piston and an aero-engine. The heavy oil engine piston is characterized in that the top surface of the piston is provided with an annular guide part which issunken along an annular shape located in the circumferential direction, the outer side face of the annular guide part corresponds to the fuel injection direction, and a guide protrusion is formed inthe center of the annular guide part. According to the heavy oil engine piston and the aero-engine, the injected fuel is guided to an ignition region of a spark plug, so that the top surface of the piston is optimized, then a combustion chamber is optimized, the compression ratio is changed, the knocking risk is reduced, meanwhile the tumbling motion effect is enhanced, the heavy oil can be fullyatomized and mixed, and uniform combustion mixture gas is formed after good mixing; and furthermore, high-efficiency combustion of the fuel can be achieved, the dynamic performance, the economical efficiency and the emission performance of the heavy oil in application to the engine can be guaranteed, and the effects of being energy-saving, environment-friendly and low in cost of the heavy oil after being applied to the engine are achieved.

Description

technical field [0001] The invention relates to engine components and applications, in particular to a heavy oil engine piston. Background technique [0002] As the fuel for the engine, heavy oil will become the power trend of small and medium-sized UAVs; however, heavy oil has high viscosity and poor low-temperature fluidity, resulting in a worse atomization effect than ordinary light oil, affecting the combustion effect, and even making it difficult to start the engine and Emissions are not 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 original EFI ignitio...

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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