Lateral-swirl combustion chamber

Abstract

The invention relates to a combustion chamber structure reconstructed on a basis of a common omega-shaped diesel engine combustion chamber. A top shunt model is processed and manufactured on the outer margin of an original omega-shaped combustion chamber without changing the matching relationship among the geometric size, the fuel injection included angle and the fuel injection characteristic of a fuel injector of the original reference omega-shaped combustion chamber. When fuel knocks the top shunt model in a right moment, the fuel turns into a lateral swirl to improve the far-end air utilization rate of the combustion chamber, expand a fuel distribution area of the combustion chamber in a radial direction and accelerate the mixing and the combusting of oil and air of the diesel engine so that the requirement for an intake swirl is relatively lowered. In the invention which is reconstructed on a basis of the original common omega-shaped combustion chamber, the top shunt model is easy and practical to process.

Description

technical field [0001] The invention relates to a specially designed and processed diesel engine combustion chamber, which can be equipped with a suitable number of tip splitter shapes on the basis of the ordinary ω-shaped combustor, and the fuel sprayed from the nozzle hole of the fuel injector hits the tip splitter shape And it diffuses to both sides of the tip shape to form a lateral plume, which improves the air utilization rate at the far end of the combustion chamber and accelerates the mixing rate of oil and gas, so as to achieve the purpose of optimizing the combustion performance and emission of the diesel engine. Background technique [0002] The fuel fragmentation and oil-air mixing process of modern diesel engines directly affect the combustion performance and emission characteristics. Therefore, atomizing the fuel as early as possible, distributing it more widely in the combustion chamber space, increasing the mixing speed with the air, and reducing the extremel...

AI Technical Summary

Problems solved by technology

The high-pressure fuel injection technology can quickly atomize the fuel in zone 2 after injection, which can better solve the problem of fuel-air mixing speed. However, there is only a small amount of fuel in zones 3 and 4 at the far end of the combustion chamber and zone 1 below the oil beam. The air utilization rate is low, even if the fuel penetration is increased by increasing the diameter of the nozzle hole, it will only increase the air utilization rate in zones 3 and 4; although the combustion chamber and swirl optimization matching technology can comprehensively optimize the However, the fuel in zone 1 can hardly reach the top dead center, and the air in this zone cannot be fully utilized only by the diffusion of fuel during the downward movement of the piston; while the turbocharged intercooling technology actually Relying on increasing intake air density and fuel supply system to increase circulating fuel injection volume to achieve the purpose of increasing power and reducing fuel consumption rate, etc., the increase of air density will lead to the decrease of fuel penetration, so that the middle and far ends of the combustion chamber and the squeeze area 3 , The air utilization rate in Zone 4 is reduced. Similarly, in Zone 1, due to the small amount of fuel arriving and the poor mixing of oil and gas

To sum up, at present, these technical means only focus on the distribution of fuel in the axial direction of the combustion chamber, and generally adopt the way of intake swirl to expand the distribution of fuel in the radial direction of the combustion chamber.

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