Aviation diesel engine piston combustion chamber and combustion system

Abstract

The invention discloses an aviation diesel engine piston combustion chamber and a combustion system. The aviation diesel engine piston combustion chamber comprises a cylinder cover and a cylinder barrel, wherein a piston is arranged in the cylinder barrel; a cavity of the combustion chamber is formed between the top of the piston and the cylinder cover; a combustion chamber concave pit is formed in the top of the piston; a groove is formed in the top of the piston and is located around the combustion chamber; and the groove is located on the outer side of the combustion chamber pit. The requirements of high power per liter, relatively low explosion pressure, engine weight and low effective brake specific fuel consumption during high-speed high-load operation of an aviation diesel engine can be met.

Description

technical field [0001] The invention relates to the technical field of engines, in particular to a piston combustion chamber and a combustion system of an aviation diesel engine. Background technique [0002] With the announcement of the country's "Opinions on Deepening the Reform of the Low-altitude Airspace Management System" and "Regulations on the Approval and Management of General Aviation Aviation Flight Missions", the scale of the domestic general aviation industry has gradually formed. An important strategic opportunity, vigorously develop the entire industry chain of general aviation, and cultivate and expand the airport industry. Among them, aero-engine, one of the core industries of general aviation, has also received increasing attention. [0003] At present, most of the small aviation piston engines are gasoline engines, and the research and development of small aviation heavy oil piston engines is only in the demonstration stage; while foreign countries have a...

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Problems solved by technology

[0004] Due to the pursuit of power-to-weight ratio of small aviation diesel engines, at high speeds such as 3500-4000r / min, the fuel injection time measured by the crank angle is significantly prolonged, and the fuel injection duration is above 35°CA; in order to reduce the quality of the diesel engine and limit the maximum explosion pressure, As a result, the fuel injection advance angle is limited, which causes the aviation diesel engine to still inject a large amount of fuel at 15°CA after it is launched. At this time, the piston has obviously moved downward. The upper side wall of the piston and the top surface of the clearance piston will increase the effective fuel consumption rate, which in turn will affect the flight mileage

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