Combustion system applied in direct injection diesel

Abstract

The invention discloses a combustion system applied in a direct injection diesel, comprising a W-shaped combustion chamber and an oil atomizer that is used for injecting high-pressure fuel oil into the combustion chamber. A plurality of arc concave pits which have the same number with oil beams of the oil atomizer and correspond to the injecting direction thereof are uniformly arranged on the inner wall of the W-shaped combustion chamber along the peripheral direction, the lower edge of every arc concave pit is connected with the inner wall of the combustion chamber in a first change structure way by the transition of small round corners, and the two side edges of every arc concave pit are connected with the intersection of the inner wall surfaces of the combustion chamber in a second change structure by the transition of the small round corners. By adopting the structure of the invention, separation between the fuel oil and the wall surface of the combustion chamber is realized in two directions, therefore, the fuel oil precipitated on the wall surface of the combustion chamber is greatly reduced, meanwhile, two spraying jets expand the range for the fuel oil to be mixed in the combustion chamber and the air is more fully utilized, thus being beneficial to reducing harmful emission.

Description

technical field [0001] The invention relates to a combustion system, which belongs to the field of engine mixture gas formation and combustion, and particularly relates to a combustion system applied to a direct-injection diesel engine. Background technique [0002] The demand for both energy conservation and environmental protection has prompted the development of engine technology in the direction of efficient and clean combustion. Particulates and NOx are the two most important harmful emissions of diesel engines, and there is a trade-off relationship between the two emissions, that is, measures to reduce one kind of emissions often bring about another. An increase in emissions. In the traditional diesel engine combustion system, the inhomogeneity of the mixed gas is relatively large during the spray mixing process, and there are likely to be more areas where the mixed gas is too rich, resulting in more particulates, and the trade-off relationship between particulates an...

AI Technical Summary

Problems solved by technology

In the traditional diesel engine combustion system, the inhomogeneity of the mixed gas is relatively large during the spray mixing process, and there are likely to be more areas where the mixed gas is too rich, resulting in more particulates, and the trade-off relationship between particulates and NOx Difficult to improve, making simultaneous reduction of both emissions a technical challenge

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