Air inlet vortex adjusting structure of diesel engine

Abstract

The invention relates to the field of engines, in particular to an air inlet vortex adjusting structure of a diesel engine. The structure comprises an air inlet channel arranged in a cylinder cover of an engine. One side of the air inlet channel is communicated with the outer part of the cylinder cover. One side of the air inlet channel is communicated with a combustion chamber. The air inlet vortex adjusting structure is characterized in that the air inlet channel is divided into a high-vortex air inlet pipe and a low-vortex air inlet pipe; an adjustable flow valve is arranged in the low-vortex air inlet pipe; the high-vortex air inlet pipe is branched to form a plurality of high-vortex air inlet manifolds; the low-vortex air inlet pipe is branched to form a plurality of low-vortex air inlet manifolds; and each combustion chamber is communicated with one high-vortex air inlet manifold and one low-vortex air inlet manifold simultaneously. The structure disclosed by the invention is capable of adjusting vortex in the combustion chamber so that a proper vortex ratio is always kept in the combustion chamber. Both the high-vortex air inlet channel and the low-vortex air inlet channel are vortex air inlet channels so that two strands of vortexes in the combustion chamber are successfully mixed and a turbulent flow is difficult to generate.

Description

technical field [0001] The invention relates to the field of engines, in particular to an intake swirl adjustment structure of a diesel engine. technical background [0002] The particle emission of a diesel engine is directly related to the size of the vortex in the combustion chamber. When the vortex is small, the oil beam of the injector cannot be well mixed with the air, so that the local excess air coefficient is less than 0.5, resulting in particles; when the vortex is large In this case, the adjacent oil beams ejected by the injector will intersect, and the local excess air coefficient will also be small. Therefore, adjusting the moderate swirl ratio can reasonably control the combustion particles, and the formation of the swirl is closely related to the structure of the intake port. relation. However, when the engine is running, the working conditions change at any time, and the required swirl ratio also changes. Therefore, in order to adjust the appropriate swirl r...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the mixing of the above-mentioned vortex air passage and the direct air passage enters the air flow and easily forms turbulent flow resulting in abnormal local swirl ratio, and provides a diesel engine intake vortex adjustment structure with double vortex intake

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