Engine and double-jet combustion method thereof

Abstract

The invention relates to an engine. The engine comprises an air cylinder, a cylinder cover, a piston, a first spark plug, a second spark plug and a fuel injector which is used for injecting fuel intothe air cylinder; the cylinder cover is arranged on the air cylinder; the piston is movably arranged in the air cylinder; a spiral air incoming channel and a tangential air incoming channel are formedin the cylinder cover; the spiral air incoming channel is used for inputting vortex air into the air cylinder; the tangential air incoming channel is used for inputting air into the air cylinder; a first combustion groove, a second combustion groove and a third combustion groove are formed in the end surface, close to the cylinder cover, of the piston; the first combustion groove is communicatedwith the third combustion groove through a first jet flow channel; the second combustion groove is communicated with the third combustion groove through a second jet flow channel; the first spark plug, the second spark plug and the oil injector are arranged on the cylinder cover; the first spark plug corresponds to the first combustion groove; and the second spark plug corresponds to the second combustion groove. The reliable and stable ignition of the engine of the invention in an overall lean-burn mode can be achieved, and combustion heat efficiency is effectively improved. The invention further relates to a double-jet combustion method of the engine.

Description

technical field [0001] The invention relates to the technical field of engine combustion, in particular to an engine and a double-jet combustion method thereof. Background technique [0002] With the continuous emphasis on energy saving and emission reduction and low-carbon economy worldwide, it is an important challenge for the future development of traditional internal combustion engines to explore efficient and clean combustion technologies for internal combustion engines to achieve energy saving and emission reduction of internal combustion engines. For a long time, gasoline engines have developed from carburetor type to in-cylinder direct injection, and even high-pressure in-cylinder direct injection. The application of a large number of new technologies has significantly increased the thermal efficiency of gasoline engines. However, from a theoretical perspective, the compression ratio and the adiabatic index of the mixture Without further improvement, it is increasing...

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Problems solved by technology

[0003] For existing lean-burn engines, the ignition process is an important factor affecting their combustion stability. Due to the limitation of the ignition lean limit of the gasoline/air mixture, the leaner the mixture concentration, the

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