Aviation heavy oil engine and aircraft

Abstract

The invention discloses an aviation heavy oil engine and an aircraft. A concave guiding portion which is sunken relative to the top surface of a piston is formed in the top surface of the piston, theoutermost point of the outer side face outward in the radial direction exceeds or is flush with the fuel injection direction of a fuel injection assembly, and the extension surface exceeds the ignition position of a center spark plug inwards and in the radial direction. The top surface of the piston and the concave guiding portion which is sunken relative to the top surface of the piston and corresponding to the injection direction of the fuel injection assembly guide fuel injected-into to the ignition area of the spark plug, the top surface of the piston is optimized, so that a combustion chamber is optimized, the compression ratio is changed, the risk of knock is reduced, the tumble effect is enhanced, a relatively complete atomization mixing of heavy oil is realized, uniform burning mixture is formed after good mixing, fuel can be efficient combusted, the power, economy and emission performances of an engine which the heavy oil is applied to are ensured, and energy saving, environmental protection and low cost after the heavy oil is applied to the engine are achieved.

Description

technical field [0001] The invention relates to an engine and its application, in particular to an aviation heavy oil engine 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....

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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