Vortex chamber combustion system utilizing umbrella-shaped spray

Abstract

The invention relates to a vortex chamber combustion system utilizing umbrella-shaped spraying, which belongs to the fields of formation and combustion of engine mixing gases. The vortex chamber combustion system utilizing an oil nozzle with an umbrella-shaped spraying has the structural characteristics that the center line of the oil nozzle with an umbrella-shaped spraying way is superposed withthe center line of a main passage so that the air which flows into a vortex chamber from a compression stroke via the main passage turns back along the wall surface of the vortex chamber to form vortex after reaching the vicinity of the head part of the oil nozzle; the direction of the vortex is just along the diffused direction of the umbrella-shaped spraying so as to accelerate oil and gas mixture and improve the combustion. Because the characteristics of short penetrating distance, even circumferential distribution and high granulation of the umbrella-shaped spraying are reasonably utilized, the favorable mixture and combustion can be obtained at lower vortex strength, thereby reducing heat dissipation loss and throttling loss and further improving the heat efficiency of an engine. Experiments on a single-cylinder 195 diesel engine indicate that the power is improved by 10 percent, the oil consumption is reduced by 8 percent, the discharge of NOx is reduced by 10 percent and the discharge of soot is reduced by 20 percent after the vortex chamber combustion system utilizing the oil nozzle with a umbrella-shaped spraying way is adopted.

Description

technical field [0001] The invention relates to a vortex chamber combustion system using an umbrella-shaped spray, belonging to the field of engine mixture gas formation and combustion. Background technique [0002] The vortex chamber diesel engine has the advantages of low cost, soft operation, low noise, high reliability and low emission, but its economy and cold start performance are worse than those of the direct injection diesel engine. The loss is large, and the heat release of the main combustion chamber is slow. Increasing the vortex intensity of the vortex chamber can improve the formation of the mixture and improve the combustion efficiency, but at the same time it will inevitably increase the flow loss of the channel and the heat dissipation loss of the wall of the vortex chamber, resulting in poor cold start performance and not necessarily increasing the thermal efficiency. Therefore, if a good mixture can be obtained at a lower swirl intensity, it will produce ...

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Problems solved by technology

[0002] The vortex chamber diesel engine has the advantages of low cost, soft operation, low noise, high reliability and low emission, but its economy and cold start performance are worse than those of the direct injection diesel engine. Large loss, slow heat release in the main combustion chamber

Increasing the vortex intensity of the vortex chamber can improve the formation of the mixture and improve the combustion efficiency, but at the same time it will inevitably increase the flow loss of the channel and the heat dissipation loss of the wall of the vortex chamber, resulting in poor cold start performance and not necessarily increasing the thermal efficiency

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